From 9ff0b44339c633edce13ce1a2909011edf46edd6 Mon Sep 17 00:00:00 2001 From: Nils Berglund <83530463+nilsberglund-orleans@users.noreply.github.com> Date: Tue, 26 Dec 2023 23:04:49 +0100 Subject: [PATCH] Add files via upload --- Parameters.md | 15377 ++++++++++++++++++++++-------------------------- 1 file changed, 7166 insertions(+), 8211 deletions(-) diff --git a/Parameters.md b/Parameters.md index 84b4c64..010bf61 100644 --- a/Parameters.md +++ b/Parameters.md @@ -9,7 +9,7 @@ function animation. Some simulations use variants of the published code. The lis updated gradually. -### 29 October 23 - A first attempt at simulating the Coandă effect ### +### 26 December 23 - Return of the water molecules ### **Program:** `lennardjones.c` @@ -37,15 +37,14 @@ updated gradually. #define YMAX 1.125 /* y interval for 9/16 aspect ratio */ #define INITXMIN -2.0 -#define INITXMAX 2.03 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.1 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ +#define INITXMAX 2.0 /* x interval for initial condition */ +#define INITYMIN -1.125 +#define INITYMAX 1.125 /* y interval for initial condition */ +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ #define BCXMIN -2.0 #define BCXMAX 2.0 /* x interval for boundary condition */ @@ -61,25 +60,25 @@ updated gradually. #define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ #define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ -#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 25 /* pattern of repelling segments, see list in global_ljones.c */ +#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ #define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ #define ROCKET_SHAPE_B 3 /* shape of second rocket */ #define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ #define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ #define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 2 /* choice of types, see TTC_ list in global_ljones.c */ +#define TYPE_PROPORTION 1.0 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ #define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ #define CENTER_PX 0 /* set to 1 to center horizontal momentum */ #define CENTER_PY 0 /* set to 1 to center vertical momentum */ #define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ #define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ #define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ @@ -89,9 +88,9 @@ updated gradually. #define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ #define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ -#define LAMBDA 0.3 /* parameter controlling the dimensions of domain */ -#define MU 0.014 /* parameter controlling radius of particles */ -#define MU_B 0.01 /* parameter controlling radius of particles of second type */ +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.016 /* parameter controlling radius of particles */ +#define MU_B 0.009 /* parameter controlling radius of particles of second type */ #define NPOLY 40 /* number of sides of polygon */ #define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ #define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ @@ -100,12 +99,14 @@ updated gradually. #define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ #define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ #define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 101 /* number of grid point for grid of disks */ -#define NGRIDY 47 /* number of grid point for grid of disks */ +#define NGRIDX 55 /* number of grid point for grid of disks */ +#define NGRIDY 27 /* number of grid point for grid of disks */ #define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ #define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ #define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ #define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ #define X_SHOOTER -0.2 #define Y_SHOOTER -0.6 @@ -114,14 +115,14 @@ updated gradually. /* Parameters for length and speed of simulation */ -#define NSTEPS 3200 /* number of frames of movie */ -#define NVID 15 /* number of iterations between images displayed on screen */ +#define NSTEPS 3600 /* number of frames of movie */ +#define NVID 30 /* number of iterations between images displayed on screen */ #define NSEG 25 /* number of segments of boundary of circles */ #define INITIAL_TIME 0 /* time after which to start saving frames */ #define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ #define BOUNDARY_WIDTH 1 /* width of particle boundary */ #define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ #define PAUSE 1000 /* number of frames after which to pause */ #define PSLEEP 1 /* sleep time during pause */ @@ -137,7 +138,13 @@ updated gradually. /* Plot type, see list in global_ljones.c */ #define PLOT 5 -#define PLOT_B 11 /* plot type for second movie */ +#define PLOT_B 13 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 0 /* type of background coloring, see list in global_ljones.c */ #define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ #define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ @@ -154,8 +161,9 @@ updated gradually. #define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ #define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ #define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ #define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ #define BLACK 1 /* background */ @@ -171,15 +179,17 @@ updated gradually. #define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ #define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ #define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.0 /* shift in color hue (for some cyclic palettes) */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ #define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ #define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ #define PRINT_OMEGA 0 /* set to 1 to print angular speed */ #define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ #define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ #define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define PRINT_TYPE_PROP 0 /* print type proportion */ #define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ /* particle properties */ @@ -188,41 +198,41 @@ updated gradually. #define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ #define PARTICLE_HUE_MIN 359.0 /* color of original particle */ #define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 1000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define PARTICLE_EMAX 20000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 60.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 280.0 /* hue of particles of type 1 */ #define HUE_TYPE2 140.0 /* hue of particles of type 2 */ #define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ #define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ #define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 7.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 6.5 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 0.02 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ +#define KREPEL 100.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ #define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 6.5 /* mass of particle of radius MU */ +#define PARTICLE_MASS 5.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU_B */ #define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ #define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 1000.0 /* initial velocity range */ +#define V_INITIAL -50.0 /* initial velocity range */ #define OMEGA_INITIAL 10.0 /* initial angular velocity range */ #define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ #define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ -#define V_INITIAL_TYPE 1 /* type of initial speed distribution (see VI_ in global_ljones.c) */ +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ #define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ #define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.0002 /* initial inverse temperature */ +#define BETA 0.00002 /* initial inverse temperature */ #define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ #define GRAVITY 0.0 /* gravity acting on all particles */ #define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ #define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ @@ -234,12 +244,19 @@ updated gradually. #define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ #define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ -#define ADD_EFIELD 1 /* set to 1 to add an electric field */ -#define EFIELD 10000.0 /* value of electric field */ +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 200000.0 /* value of electric field */ #define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ -#define BFIELD 1000.0 /* value of magnetic field */ -#define CHARGE 0.0 /* charge of particles of first type */ -#define CHARGE_B 1.0 /* charge of particles of second type */ +#define BFIELD 10000.0 /* value of magnetic field */ +#define CHARGE 2.0 /* charge of particles of first type */ +#define CHARGE_B -1.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 10000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ #define ROTATION 0 /* set to 1 to include rotation of particles */ #define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ @@ -250,30 +267,30 @@ updated gradually. #define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ #define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ #define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 0 /* set to 1 to draw cross on particles of second type */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ #define SPIN_RANGE 10.0 /* range of spin-spin interaction */ #define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ #define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ +#define INCREASE_BETA 1 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 5.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ #define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ #define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ #define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ #define COMPRESSION_RATIO 0.3 /* final size of container */ #define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ #define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ #define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ #define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ #define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ #define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ #define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ #define OBSTACLE_XMAX 3.0 /* final position of obstacle */ @@ -297,8 +314,8 @@ updated gradually. #define ADD_PARTICLES 0 /* set to 1 to add particles */ #define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ #define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ #define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ @@ -322,12 +339,12 @@ updated gradually. #define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ #define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ #define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 0.0 /* initial position of segments */ -#define SEGMENTS_Y0 -0.6 /* initial position of segments */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ #define SEGMENTS_VX0 0.0 /* initial velocity of segments */ #define SEGMENTS_VY0 0.0 /* initial velocity of segments */ #define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ -#define SHOW_SEGMENTS_PRESSURE 0 /* set to 1 to show (averaged) pressure acting on segments */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ #define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ #define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ @@ -382,6 +399,16 @@ updated gradually. #define WALL_VMAX 100.0 /* max speed of wall */ #define WALL_TIME 0 /* time during which to keep wall */ +#define CHANGE_TYPES 0 /* set to 1 to change type proportion in course of simulation */ +#define PROP_MIN 0.1 /* min proportion of type 1 particles */ +#define PROP_MAX 0.9 /* max proportion of type 1 particles */ + +#define PAIR_PARTICLES 1 /* set to 1 to form particles pairs */ +#define KSPRING_PAIRS 1.0e10 /* spring constant for pair interaction */ +#define NPARTNERS 2 /* number of partners of particles */ +#define PAIRING_TYPE 2 /* type of pairing, see POLY_ in global_ljones.c */ +#define PARTNER_ANGLE 104.45 /* angle (in degrees) between anions for POLY_WATER case */ + #define NXMAZE 12 /* width of maze */ #define NYMAZE 12 /* height of maze */ #define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ @@ -394,7 +421,855 @@ updated gradually. #define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ #define PMAX 1000.0 /* maximal force */ -#define HASHX 60 /* size of hashgrid in x direction */ +#define HASHX 100 /* size of hashgrid in x direction */ +#define HASHY 50 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 25 December 23 - A Christmas wave guide (short version) ### + +**Program:** `wave_billiard.c` + +**Initial condition in function `animation()`:** + +``` + init_wave_flat(phi, psi, xy_in); + + if ((ADD_OSCILLATING_SOURCE)&&(i%OSCILLATING_SOURCE_PERIOD == 1)) + { + if (ALTERNATE_OSCILLATING_SOURCE) sign = -sign; + add_circular_wave(sign, 0.0, -3.1*LAMBDA, phi, psi, xy_in); + } +``` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 0 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 1 /* set to 1 for a variable index of refraction */ +#define IOR 14 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1150 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 2300 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -1.197916667 +#define XMAX 1.197916667 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 73 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.32 /* parameter controlling the dimensions of domain */ +#define MU 0.48 /* parameter controlling the dimensions of domain */ +#define MU_B 0.42 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.666666666666 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.04 /* Courant number */ +#define COURANTB 0.12 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0001 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 1 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 15 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 2 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 1100 /* number of frames of movie */ +#define NVID 15 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 0.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.000012 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 13 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 50.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 0.5 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 1.5 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 0 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +### 25 December 23 - A Christmas wave guide ### + +**Program:** `wave_billiard.c` + +**Initial condition in function `animation()`:** + +``` + init_wave_flat(phi, psi, xy_in); + + if ((ADD_OSCILLATING_SOURCE)&&(i%OSCILLATING_SOURCE_PERIOD == 1)) + { + if (ALTERNATE_OSCILLATING_SOURCE) sign = -sign; + add_circular_wave(sign, 0.0, -3.1*LAMBDA, phi, psi, xy_in); + } +``` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 0 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 1 /* set to 1 for a variable index of refraction */ +#define IOR 14 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 73 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.32 /* parameter controlling the dimensions of domain */ +#define MU 0.48 /* parameter controlling the dimensions of domain */ +#define MU_B 0.42 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.666666666666 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.06 /* Courant number */ +#define COURANTB 0.18 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0001 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 1 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 8 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 2 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 3750 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 0.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.000012 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 5 + +#define PLOT_B 0 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 13 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 17 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 50.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 0.5 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 1.5 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 0 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +### 24 December 23 - Let it snow! (short verion) ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 0 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 900 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -1.125 +#define XMAX 1.125 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -1.125 +#define INITXMAX 1.125 /* x interval for initial condition */ +#define INITYMIN 1.125 +#define INITYMAX 2.5 /* y interval for initial condition */ + +#define ADDXMIN -1.125 +#define ADDXMAX 1.125 /* x interval for adding particles */ +#define ADDYMIN 1.2 +#define ADDYMAX 4.0 /* y interval for adding particles */ + +#define BCXMIN -1.5 +#define BCXMAX 1.5 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 4.5 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 28 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 0 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 1.0 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.07 /* parameter controlling the dimensions of domain */ +#define MU 0.006 /* parameter controlling radius of particles */ +#define MU_B 0.009 /* parameter controlling radius of particles of second type */ +#define NPOLY 3 /* number of sides of polygon */ +#define APOLY -1.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 1 /* number of grid point for grid of disks */ +#define NGRIDY 2 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ +#define NTREES 15 /* number of trees in S_TREES */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 1200 /* number of frames of movie */ +#define NVID 60 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 3 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 1 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 5 +#define PLOT_B 13 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 0 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 0 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ +#define COLOR_PALETTE_PRESSURE 11 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define PRINT_TYPE_PROP 0 /* print type proportion */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 300.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 20000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 1 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 30.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 3.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 3.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 100.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 16.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU_B */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL 0.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.00002 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 5000.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 200000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 10000.0 /* value of magnetic field */ +#define CHARGE -2.0 /* charge of particles of first type */ +#define CHARGE_B 1.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 10000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 5.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 1 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 5.0e8 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define CHANGE_TYPES 0 /* set to 1 to change type proportion in course of simulation */ +#define PROP_MIN 0.1 /* min proportion of type 1 particles */ +#define PROP_MAX 0.9 /* max proportion of type 1 particles */ + +#define PAIR_PARTICLES 0 /* set to 1 to form particles pairs */ +#define KSPRING_PAIRS 1.0e10 /* spring constant for pair interaction */ +#define NPARTNERS 2 /* number of partners of particles */ +#define PAIRING_TYPE 2 /* type of pairing, see POLY_ in global_ljones.c */ +#define PARTNER_ANGLE 90.0 /* angle (in degrees) between anions for POLY_WATER case */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 60 /* size of hashgrid in x direction */ #define HASHY 30 /* size of hashgrid in y direction */ #define HASHMAX 100 /* maximal number of particles per hashgrid cell */ #define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ @@ -408,290 +1283,13 @@ updated gradually. ``` -### 28 October 23 - An asteroid impact at point Nemo, 2D representation ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** `init_circular_wave_sphere(123.3*PI/180.0, -48.8*PI/180.0, phi, psi, xy_in, wsphere);` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 0.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.6 /* scaling for Julia sets */ -#define JULIA_ROT -20.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE 0.5 -#define JULIA_IM 0.462 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 500 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 0 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 1 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 1 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 1 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 75.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 1 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 2 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 2.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {-0.816496581, 0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {-5.0, 8.0, -7.0}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define ADD_NEGATIVE_DEM 0 /* add DEM with bathymetric data */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 0 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 10 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 27 October 23 - A plasma with Coulomb interaction in electric and magnetic fields ### +### 24 December 23 - Let it snow! ### **Program:** `lennardjones.c` ``` #define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define DOUBLE_MOVIE 0 /* set to 1 to produce movies for wave height and energy simultaneously */ #define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ #define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ @@ -704,8 +1302,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* General geometrical parameters */ -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ #define XMIN -2.0 #define XMAX 2.0 /* x interval */ @@ -713,20 +1311,19 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define YMAX 1.125 /* y interval for 9/16 aspect ratio */ #define INITXMIN -2.0 -#define INITXMAX 2.01 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.17 /* y interval for initial condition */ +#define INITXMAX 2.0 /* x interval for initial condition */ +#define INITYMIN 1.125 +#define INITYMAX 2.5 /* y interval for initial condition */ -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ +#define ADDXMIN -2.0 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN 1.2 +#define ADDYMAX 4.0 /* y interval for adding particles */ - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCXMIN -2.5 +#define BCXMAX 2.5 /* x interval for boundary condition */ #define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ +#define BCYMAX 4.5 /* y interval for boundary condition */ #define OBSXMIN -2.0 #define OBSXMAX 2.0 /* x interval for motion of obstacle */ @@ -737,24 +1334,24 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ #define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ -#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 24 /* pattern of repelling segments, see list in global_ljones.c */ +#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 28 /* pattern of repelling segments, see list in global_ljones.c */ #define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ #define ROCKET_SHAPE_B 3 /* shape of second rocket */ #define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ #define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ -#define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ +#define TWO_TYPES 0 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 1.0 /* proportion of particles of first type */ #define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ #define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ #define CENTER_PX 0 /* set to 1 to center horizontal momentum */ #define CENTER_PY 0 /* set to 1 to center vertical momentum */ #define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ -#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ #define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ #define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ #define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ @@ -765,23 +1362,26 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ #define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ -#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ -#define MU 0.008 /* parameter controlling radius of particles */ -#define MU_B 0.018 /* parameter controlling radius of particles of second type */ -#define NPOLY 40 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define LAMBDA 0.075 /* parameter controlling the dimensions of domain */ +#define MU 0.006 /* parameter controlling radius of particles */ +#define MU_B 0.009 /* parameter controlling radius of particles of second type */ +#define NPOLY 3 /* number of sides of polygon */ +#define APOLY -1.0 /* angle by which to turn polygon, in units of Pi/2 */ #define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ #define MDEPTH 4 /* depth of computation of Menger gasket */ #define MRATIO 3 /* ratio defining Menger gasket */ #define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ #define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ #define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 70 /* number of grid point for grid of disks */ -#define NGRIDY 35 /* number of grid point for grid of disks */ +#define NGRIDX 1 /* number of grid point for grid of disks */ +#define NGRIDY 2 /* number of grid point for grid of disks */ #define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ #define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ #define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ #define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ +#define NTREES 20 /* number of trees in S_TREES */ #define X_SHOOTER -0.2 #define Y_SHOOTER -0.6 @@ -790,14 +1390,14 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* Parameters for length and speed of simulation */ -#define NSTEPS 2600 /* number of frames of movie */ +#define NSTEPS 4000 /* number of frames of movie */ #define NVID 30 /* number of iterations between images displayed on screen */ #define NSEG 25 /* number of segments of boundary of circles */ #define INITIAL_TIME 0 /* time after which to start saving frames */ #define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ #define BOUNDARY_WIDTH 1 /* width of particle boundary */ #define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ +#define CONTAINER_WIDTH 3 /* width of container boundary */ #define PAUSE 1000 /* number of frames after which to pause */ #define PSLEEP 1 /* sleep time during pause */ @@ -808,12 +1408,18 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* Boundary conditions, see list in global_ljones.c */ -#define BOUNDARY_COND 3 +#define BOUNDARY_COND 1 /* Plot type, see list in global_ljones.c */ #define PLOT 5 -#define PLOT_B 14 /* plot type for second movie */ +#define PLOT_B 13 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 0 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 0 /* type of background coloring, see list in global_ljones.c */ #define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ #define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ @@ -830,8 +1436,10 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ #define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ #define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ #define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ +#define COLOR_PALETTE_PRESSURE 11 /* Color palette for different neighbours representation */ #define BLACK 1 /* background */ @@ -849,57 +1457,59 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ #define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ #define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ #define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ #define PRINT_OMEGA 0 /* set to 1 to print angular speed */ #define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ #define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ #define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define PRINT_TYPE_PROP 0 /* print type proportion */ #define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ /* particle properties */ #define ENERGY_HUE_MIN 330.0 /* color of original particle */ #define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MIN 300.0 /* color of original particle */ #define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ +#define PARTICLE_EMAX 20000.0 /* energy of particle with hottest color */ #define HUE_TYPE0 280.0 /* hue of particles of type 0 */ #define HUE_TYPE1 60.0 /* hue of particles of type 1 */ #define HUE_TYPE2 140.0 /* hue of particles of type 2 */ #define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define RANDOM_RADIUS 1 /* set to 1 for random circle radius */ #define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 50.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ +#define KREPEL 30.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 3.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 3.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 100.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ #define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS 16.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU_B */ #define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ #define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 400.0 /* initial velocity range */ +#define V_INITIAL 0.0 /* initial velocity range */ #define OMEGA_INITIAL 10.0 /* initial angular velocity range */ #define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ #define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ #define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ -#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ #define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ #define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.0002 /* initial inverse temperature */ +#define BETA 0.00002 /* initial inverse temperature */ #define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 5000.0 /* gravity acting on all particles */ #define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ #define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ #define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ @@ -910,688 +1520,19 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ #define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ -#define ADD_EFIELD 1 /* set to 1 to add an electric field */ -#define EFIELD 50000.0 /* value of electric field */ -#define ADD_BFIELD 1 /* set to 1 to add a magnetic field */ -#define BFIELD 1000.0 /* value of magnetic field */ -#define CHARGE -1.0 /* charge of particles of first type */ -#define CHARGE_B 1.0 /* charge of particles of second type */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX -2.0*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ -#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ -#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ -#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 80 /* size of hashgrid in x direction */ -#define HASHY 40 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 26 October 23 - An asteroid impact at point Nemo ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** `init_circular_wave_sphere(123.3*PI/180.0, -48.8*PI/180.0, phi, psi, xy_in, wsphere);` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 0.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.6 /* scaling for Julia sets */ -#define JULIA_ROT -20.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE 0.5 -#define JULIA_IM 0.462 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 500 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 1 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 75.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 1 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 2 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 2.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {-0.816496581, 0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {-5.0, 8.0, -7.0}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define ADD_NEGATIVE_DEM 0 /* add DEM with bathymetric data */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 0 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 10 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 25 October 23 - A plasma with Coulomb interaction in an electric field ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.0 -#define INITXMAX 2.01 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.17 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 24 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ -#define MU 0.008 /* parameter controlling radius of particles */ -#define MU_B 0.018 /* parameter controlling radius of particles of second type */ -#define NPOLY 40 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 70 /* number of grid point for grid of disks */ -#define NGRIDY 35 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2600 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 250 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 5 -#define PLOT_B 14 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 50.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 400.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ - -#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.0002 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ -#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ -#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ADD_EFIELD 1 /* set to 1 to add an electric field */ -#define EFIELD 50000.0 /* value of electric field */ +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 200000.0 /* value of electric field */ #define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ -#define BFIELD 1000.0 /* value of magnetic field */ -#define CHARGE -1.0 /* charge of particles of first type */ +#define BFIELD 10000.0 /* value of magnetic field */ +#define CHARGE -2.0 /* charge of particles of first type */ #define CHARGE_B 1.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 10000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ #define ROTATION 0 /* set to 1 to include rotation of particles */ #define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ @@ -1608,24 +1549,24 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ #define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ +#define BETA_FACTOR 5.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ #define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ #define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ #define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ #define COMPRESSION_RATIO 0.3 /* final size of container */ #define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ #define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ #define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ #define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ #define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ #define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ #define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ #define OBSTACLE_XMAX 3.0 /* final position of obstacle */ @@ -1647,10 +1588,10 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ #define NPART_BOTTOM 100 /* number of particles at the bottom */ -#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_PARTICLES 1 /* set to 1 to add particles */ #define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ #define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ #define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ @@ -1660,7 +1601,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ #define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ #define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ #define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ #define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ @@ -1680,7 +1621,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define SEGMENTS_VY0 0.0 /* initial velocity of segments */ #define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ #define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ -#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define SEGMENT_PMAX 5.0e8 /* pressure of segment with hottest color */ #define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ #define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ @@ -1734,6 +1675,16 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define WALL_VMAX 100.0 /* max speed of wall */ #define WALL_TIME 0 /* time during which to keep wall */ +#define CHANGE_TYPES 0 /* set to 1 to change type proportion in course of simulation */ +#define PROP_MIN 0.1 /* min proportion of type 1 particles */ +#define PROP_MAX 0.9 /* max proportion of type 1 particles */ + +#define PAIR_PARTICLES 0 /* set to 1 to form particles pairs */ +#define KSPRING_PAIRS 1.0e10 /* spring constant for pair interaction */ +#define NPARTNERS 2 /* number of partners of particles */ +#define PAIRING_TYPE 2 /* type of pairing, see POLY_ in global_ljones.c */ +#define PARTNER_ANGLE 90.0 /* angle (in degrees) between anions for POLY_WATER case */ + #define NXMAZE 12 /* width of maze */ #define NYMAZE 12 /* height of maze */ #define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ @@ -1746,8 +1697,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ #define PMAX 1000.0 /* maximal force */ -#define HASHX 80 /* size of hashgrid in x direction */ -#define HASHY 40 /* size of hashgrid in y direction */ +#define HASHX 60 /* size of hashgrid in x direction */ +#define HASHY 30 /* size of hashgrid in y direction */ #define HASHMAX 100 /* maximal number of particles per hashgrid cell */ #define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ @@ -1760,15 +1711,21 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO ``` -### 24 October 23 - Waves on a planet with a cubic Julia set continent, 2D representation ### +### 23 December 23 - Side by side comparison of two optical fibers ### -**Program:** `wave_sphere.c` +**Program:** `wave_billiard.c` **Initial condition in function `animation()`:** + ``` - init_circular_wave_sphere(1.0 - PI/9.0, 0.15, phi, psi, xy_in, wsphere); - add_circular_wave_sphere(1.0, 1.0 - PI/9.0 + DPI/3.0, 0.15, phi, psi, xy_in, wsphere); - add_circular_wave_sphere(1.0, 1.0 - PI/9.0 + 2.0*DPI/3.0, 0.15, phi, psi, xy_in, wsphere); + init_wave_flat(phi, psi, xy_in); + + if ((ADD_OSCILLATING_SOURCE)&&(i%OSCILLATING_SOURCE_PERIOD == 1)) + { + if (ALTERNATE_OSCILLATING_SOURCE) sign = -sign; + add_circular_wave(sign, -1.5, 0.8, phi, psi, xy_in); + add_circular_wave(sign, -1.5, -0.35, phi, psi, xy_in); + } ``` ``` @@ -1777,32 +1734,1294 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ #define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ +#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ +#define IOR 13 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + /* General geometrical parameters */ #define WINWIDTH 1920 /* window width */ #define WINHEIGHT 1150 /* window height */ -#define NX 1920 /* number of grid points on x axis */ -#define NY 1150 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 0.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ #define XMIN -2.0 #define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 521 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 1.0 /* parameter controlling the dimensions of domain */ +#define MU 0.48 /* parameter controlling the dimensions of domain */ +#define MU_B 0.42 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.666666666666 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.06 /* Courant number */ +#define COURANTB 0.18 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.007 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 1 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 8 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 2 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2700 /* number of frames of movie */ +#define NVID 20 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 0.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.000012 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 13 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 40.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.5 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 0.4 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 0 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` +### 22 December 23 - Molecular caterpillars ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.0 /* x interval for initial condition */ +#define INITYMIN -1.125 +#define INITYMAX 1.125 /* y interval for initial condition */ + +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 1 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 1.0 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.01 /* parameter controlling radius of particles */ +#define MU_B 0.012 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 30 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2400 /* number of frames of movie */ +#define NVID 30 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 3 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 5 +#define PLOT_B 13 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 0 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define PRINT_TYPE_PROP 0 /* print type proportion */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 10000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 60.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 280.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 2.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL -50.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.00004 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 200000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 10000.0 /* value of magnetic field */ +#define CHARGE 1.5 /* charge of particles of first type */ +#define CHARGE_B -1.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 10000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 1 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 5.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define CHANGE_TYPES 0 /* set to 1 to change type proportion in course of simulation */ +#define PROP_MIN 0.1 /* min proportion of type 1 particles */ +#define PROP_MAX 0.9 /* max proportion of type 1 particles */ + +#define PAIR_PARTICLES 1 /* set to 1 to form particles pairs */ +#define KSPRING_PAIRS 1.0e10 /* spring constant for pair interaction */ +#define NPARTNERS 2 /* number of partners of particles */ +#define PAIRING_TYPE 1 /* type of pairing, see POLY_ in global_ljones.c */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 100 /* size of hashgrid in x direction */ +#define HASHY 50 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 21 December 23 - Optical fibers, single-mode vs multimode ### + +**Program:** `wave_billiard.c` + +**Initial condition in function `animation()`:** + +``` + init_wave_flat(phi, psi, xy_in); + + if ((ADD_OSCILLATING_SOURCE)&&(i%OSCILLATING_SOURCE_PERIOD == 1)) + { + if (ALTERNATE_OSCILLATING_SOURCE) sign = -sign; + add_circular_wave(sign, -1.5, 0.6, phi, psi, xy_in); + } +``` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ +#define IOR 13 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 52 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 1.0 /* parameter controlling the dimensions of domain */ +#define MU 0.48 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.666666666666 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.06 /* Courant number */ +#define COURANTB 0.18 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.007 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 1 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 8 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 2 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2400 /* number of frames of movie */ +#define NVID 20 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 0.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.000012 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 13 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 60.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.5 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 0.6 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 1 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 0 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +**Part 2:** + +``` +#define MU 0.42 /* parameter controlling the dimensions of domain */ + +``` + +### 20 December 23 - Triatomic molecules under temperature cycling ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.0 /* x interval for initial condition */ +#define INITYMIN -1.125 +#define INITYMAX 1.125 /* y interval for initial condition */ + +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 1 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 1.0 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.012 /* parameter controlling radius of particles */ +#define MU_B 0.01 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 70 /* number of grid point for grid of disks */ +#define NGRIDY 35 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 4100 /* number of frames of movie */ +#define NVID 30 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 3 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 5 +#define PLOT_B 13 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 0 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define PRINT_TYPE_PROP 0 /* print type proportion */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 10000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 60.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 280.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 2.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL -50.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.00004 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 200000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 10000.0 /* value of magnetic field */ +#define CHARGE 2.0 /* charge of particles of first type */ +#define CHARGE_B -1.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 10000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 1 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 5.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define CHANGE_TYPES 0 /* set to 1 to change type proportion in course of simulation */ +#define PROP_MIN 0.1 /* min proportion of type 1 particles */ +#define PROP_MAX 0.9 /* max proportion of type 1 particles */ + +#define PAIR_PARTICLES 1 /* set to 1 to form particles pairs */ +#define KSPRING_PAIRS 1.0e10 /* spring constant for pair interaction */ +#define NPARTNERS 2 /* number of partners of particles */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 100 /* size of hashgrid in x direction */ +#define HASHY 50 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 19 December 23 - Flooding the Moon (short version) ### + +**Program:** `earth_sealevel.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 0 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +/* General geometrical parameters */ + +#define WINWIDTH 1150 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 2048 /* number of grid points on x axis */ +#define NY 2048 /* number of grid points on y axis */ + +#define DPOLE 20 /* safety distance to poles */ +#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ +#define ZERO_MERIDIAN 180.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ + +#define XMIN -1.041666667 +#define XMAX 1.041666667 /* x interval */ #define YMIN -1.041666667 #define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ #define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ -#define JULIA_SCALE 0.6 /* scaling for Julia sets */ -#define JULIA_ROT -20.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE 0.5 -#define JULIA_IM 0.462 /* parameters for Julia sets */ +#define JULIA_SCALE 0.25 /* scaling for Julia sets */ +#define JULIA_ROT 180.0 /* rotation of Julia set, in degrees */ +#define JULIA_RE -0.77145 +#define JULIA_IM -0.10295 /* parameters for Julia sets */ /* Choice of the billiard table */ -#define B_DOMAIN 85 /* choice of domain shape, see list in global_pdes.c */ +#define B_DOMAIN 87 /* choice of domain shape, see list in global_pdes.c */ #define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ @@ -1889,7 +3108,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* Parameters for length and speed of simulation */ -#define NSTEPS 3500 /* number of frames of movie */ +#define NSTEPS 1200 /* number of frames of movie */ #define NVID 4 /* number of iterations between images displayed on screen */ #define NSEG 1000 /* number of segments of boundary */ #define INITIAL_TIME 0 /* time after which to start saving frames */ @@ -1901,12 +3120,12 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define SLEEP1 1 /* initial sleeping time */ #define SLEEP2 1 /* final sleeping time */ #define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 500 /* number of still frames at end of movie */ +#define END_FRAMES 100 /* number of still frames at end of movie */ #define FADE 1 /* set to 1 to fade at end of movie */ /* Parameters of initial condition */ -#define INITIAL_AMP -0.5 /* amplitude of initial condition */ +#define INITIAL_AMP 0.5 /* amplitude of initial condition */ #define INITIAL_VARIANCE 0.001 /* variance of initial condition */ #define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ @@ -1921,8 +3140,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ #define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ #define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 0 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 1 /* set to 1 to change luminosity according to normal vector to plane */ +#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ +#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ #define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ #define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ #define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ @@ -1941,23 +3160,23 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* 3D representation */ #define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 1 /* switch to 2D representation, equirectangular projection */ +#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ #define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 0 /* set to 1 to draw waves above altitude (for Earth representations) */ +#define FLOODING 1 /* set to 1 to draw waves above altitude (for Earth representations) */ #define REP_AXO_3D 0 /* linear projection (axonometry) */ #define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ #define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 720.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 1 /* set to 1 to keep rotating viewpoint during fade */ +#define ROTATE_ANGLE 360.0 /* total angle of rotation during simulation */ +#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ -#define VIEWPOINT_TRAJ 0 /* type of viewpoint trajectory */ +#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ /* Color schemes */ -#define COLOR_PALETTE 18 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 12 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ #define BLACK 1 /* background */ #define COLOR_OUT_R 1.0 /* color outside domain */ @@ -1967,8 +3186,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ #define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 0.75 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define VSCALE_AMPLITUDE 1.0 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ #define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ #define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ #define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ @@ -1996,14 +3215,15 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ #define MAZE_WIDTH 0.02 /* half width of maze walls */ -#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 2.0 /* scale of color scheme bar */ +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ #define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 1 /* set to 1 to draw color scheme horizontally */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ #define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ #define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ #define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 0 /* set to 1 to draw wave profile vertically */ #define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ #define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ @@ -2021,20 +3241,32 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ double v_3d[2] = {-0.75, -0.45}; double w_3d[2] = {0.0, 0.015}; -double light[3] = {0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {3.0, -10.0, 5.0}; /* location of observer for REP_PROJ_3D representation */ +double light[3] = {-0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ +double observer[3] = {-7.0, -2.0, 2.5}; /* location of observer for REP_PROJ_3D representation */ int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ -#define ADD_DEM 0 /* add DEM (digital elevation model) */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 0 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 10 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ -#define RSCALE 0.05 /* scaling factor of radial component */ +#define ADD_DEM 1 /* add DEM (digital elevation model) */ +#define ADD_NEGATIVE_DEM 0 /* add DEM with bathymetric data */ +#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ +#define SMOOTH_DEM 1 /* set to 1 to smoothen DEM (to make altitude less constant) */ +#define DEM_SMOOTH_STEPS 5 /* number of smoothening steps */ +#define DEM_SMOOTH_HEIGHT 1.0 /* relative height below which to smoothen */ +#define DEM_MAXHEIGHT 15000 /* max height of DEM */ +#define DEM_MAXDEPTH -10000 /* max depth of DEM */ +#define PLANET_SEALEVEL 0.0 /* sea level for flooded planet */ +#define VENUS_NODATA_FACTOR 0.5 /* altitude to assign to DEM points without data (fraction of mean altitude) */ + +#define MAXHEIGHT 5000.0 /* max sea level height */ +#define MAXDEPTH 4000.0 /* max sea level depth */ + +#define RSCALE 0.01 /* scaling factor of radial component */ #define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ +#define RMIN 0.5 /* min value of radial component */ +#define Z_SCALING_FACTOR 0.8 /* overall scaling factor of z axis for REP_PROJ_3D representation */ +#define XY_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ +#define X_SCALING_FACTOR 1.8 /* overall scaling factor for on-screen (x,y) coordinates after projection */ +#define Y_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ #define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ #define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ #define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ @@ -2042,7 +3274,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO ``` -### 23 October 23 - Prelude to the Coandă effect – Kinetic energy and velocity ### +### 18 December 23 - Interacting polar diatomic molecules ### **Program:** `lennardjones.c` @@ -2061,23 +3293,23 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* General geometrical parameters */ -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ #define XMIN -2.0 #define XMAX 2.0 /* x interval */ #define YMIN -1.125 #define YMAX 1.125 /* y interval for 9/16 aspect ratio */ -#define INITXMIN -2.0 -#define INITXMAX 2.03 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.1 /* y interval for initial condition */ +#define INITXMIN -1.95 +#define INITXMAX 2.0 /* x interval for initial condition */ +#define INITYMIN -1.075 +#define INITYMAX 1.125 /* y interval for initial condition */ -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ #define BCXMIN -2.0 @@ -2094,25 +3326,25 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ #define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ #define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 24 /* pattern of repelling segments, see list in global_ljones.c */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ #define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ #define ROCKET_SHAPE_B 3 /* shape of second rocket */ #define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ #define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ #define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 2 /* choice of types, see TTC_ list in global_ljones.c */ +#define TYPE_PROPORTION 1.0 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ #define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ #define CENTER_PX 0 /* set to 1 to center horizontal momentum */ #define CENTER_PY 0 /* set to 1 to center vertical momentum */ #define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ #define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ #define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ @@ -2123,8 +3355,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ #define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ -#define MU 0.014 /* parameter controlling radius of particles */ -#define MU_B 0.008 /* parameter controlling radius of particles of second type */ +#define MU 0.01 /* parameter controlling radius of particles */ +#define MU_B 0.014 /* parameter controlling radius of particles of second type */ #define NPOLY 40 /* number of sides of polygon */ #define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ #define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ @@ -2133,12 +3365,14 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ #define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ #define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 101 /* number of grid point for grid of disks */ -#define NGRIDY 47 /* number of grid point for grid of disks */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 30 /* number of grid point for grid of disks */ #define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ #define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ #define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ #define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ #define X_SHOOTER -0.2 #define Y_SHOOTER -0.6 @@ -2147,14 +3381,14 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* Parameters for length and speed of simulation */ -#define NSTEPS 2200 /* number of frames of movie */ -#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSTEPS 4200 /* number of frames of movie */ +#define NVID 30 /* number of iterations between images displayed on screen */ #define NSEG 25 /* number of segments of boundary of circles */ #define INITIAL_TIME 0 /* time after which to start saving frames */ #define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ #define BOUNDARY_WIDTH 1 /* width of particle boundary */ #define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ #define PAUSE 1000 /* number of frames after which to pause */ #define PSLEEP 1 /* sleep time during pause */ @@ -2170,7 +3404,13 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* Plot type, see list in global_ljones.c */ #define PLOT 13 -#define PLOT_B 14 /* plot type for second movie */ +#define PLOT_B 5 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 0 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 4 /* type of background coloring, see list in global_ljones.c */ #define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ #define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ @@ -2187,8 +3427,9 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ #define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ #define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ #define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ #define BLACK 1 /* background */ @@ -2204,15 +3445,17 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ #define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ #define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.0 /* shift in color hue (for some cyclic palettes) */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ #define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ #define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ #define PRINT_OMEGA 0 /* set to 1 to print angular speed */ #define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ #define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ #define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define PRINT_TYPE_PROP 0 /* print type proportion */ #define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ /* particle properties */ @@ -2221,41 +3464,41 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ #define PARTICLE_HUE_MIN 359.0 /* color of original particle */ #define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ +#define PARTICLE_EMAX 10000.0 /* energy of particle with hottest color */ #define HUE_TYPE0 280.0 /* hue of particles of type 0 */ #define HUE_TYPE1 60.0 /* hue of particles of type 1 */ #define HUE_TYPE2 140.0 /* hue of particles of type 2 */ #define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ #define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ #define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.25 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 1.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 0.02 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ #define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ #define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 5.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.5 /* mass of particle of radius MU */ #define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ #define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 400.0 /* initial velocity range */ +#define V_INITIAL -50.0 /* initial velocity range */ #define OMEGA_INITIAL 10.0 /* initial angular velocity range */ #define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ #define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ -#define V_INITIAL_TYPE 1 /* type of initial speed distribution (see VI_ in global_ljones.c) */ +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ #define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ #define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.0002 /* initial inverse temperature */ +#define BETA 0.00004 /* initial inverse temperature */ #define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ #define GRAVITY 0.0 /* gravity acting on all particles */ #define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ #define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ @@ -2268,11 +3511,18 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ #define ADD_EFIELD 1 /* set to 1 to add an electric field */ -#define EFIELD 2000.0 /* value of electric field */ -#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ -#define BFIELD 1000.0 /* value of magnetic field */ -#define CHARGE 0.0 /* charge of particles of first type */ +#define EFIELD 200000.0 /* value of electric field */ +#define ADD_BFIELD 1 /* set to 1 to add a magnetic field */ +#define BFIELD 10000.0 /* value of magnetic field */ +#define CHARGE -1.0 /* charge of particles of first type */ #define CHARGE_B 1.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 10000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ #define ROTATION 0 /* set to 1 to include rotation of particles */ #define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ @@ -2283,30 +3533,30 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ #define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ #define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 0 /* set to 1 to draw cross on particles of second type */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ #define SPIN_RANGE 10.0 /* range of spin-spin interaction */ #define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ #define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ +#define INCREASE_BETA 1 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 10.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ #define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ #define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ #define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ #define COMPRESSION_RATIO 0.3 /* final size of container */ #define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ #define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ #define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ #define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ #define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ #define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ #define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ #define OBSTACLE_XMAX 3.0 /* final position of obstacle */ @@ -2330,8 +3580,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define ADD_PARTICLES 0 /* set to 1 to add particles */ #define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ #define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ #define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ @@ -2341,7 +3591,1874 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ #define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define CHANGE_TYPES 0 /* set to 1 to change type proportion in course of simulation */ +#define PROP_MIN 0.1 /* min proportion of type 1 particles */ +#define PROP_MAX 0.9 /* max proportion of type 1 particles */ + +#define PAIR_PARTICLES 1 /* set to 1 to form particles pairs */ +#define KSPRING_PAIRS 1.0e10 /* spring constant for pair interaction */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 90 /* size of hashgrid in x direction */ +#define HASHY 45 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 17 December 23 - Combining a biconcave and a convex lens ### + +**Program:** `wave_billiard.c` + +**Initial condition in function `animation()`:** `init_wave_flat(phi, psi, xy_in);` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 1 /* set to 1 for a variable index of refraction */ +#define IOR 13 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 69 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 1.8 /* parameter controlling the dimensions of domain */ +#define MU 0.915 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.666666666666 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 1 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.1 /* Courant number */ +#define COURANTB 0.04 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 20 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 3 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2600 /* number of frames of movie */ +#define NVID 7 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 300 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 1.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.00001 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.025 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 13 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 100.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 0.4 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 1 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 1 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 1 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +### 16 December 23 - Crystals or proteins? ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.01 /* x interval for initial condition */ +#define INITYMIN -1.1 +#define INITYMAX 1.17 /* y interval for initial condition */ + +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ + + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 1 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.01 /* parameter controlling radius of particles */ +#define MU_B 0.01 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 90 /* number of grid point for grid of disks */ +#define NGRIDY 45 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 4500 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 0 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 5 +#define PLOT_B 13 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 0 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define PRINT_TYPE_PROP 0 /* print type proportion */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 30000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL -50.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.0001 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 1000000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 5333.33333333333 /* value of magnetic field */ +#define CHARGE -1.0 /* charge of particles of first type */ +#define CHARGE_B 1.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 1000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 200.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define CHANGE_TYPES 0 /* set to 1 to change type proportion in course of simulation */ +#define PROP_MIN 0.1 /* min proportion of type 1 particles */ +#define PROP_MAX 0.9 /* max proportion of type 1 particles */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 80 /* size of hashgrid in x direction */ +#define HASHY 40 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 15 December 23 - A biconcave lens ### + +**Program:** `wave_billiard.c` + +**Initial condition in function `animation()`:** `init_wave_flat(phi, psi, xy_in);` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 1 /* set to 1 for a variable index of refraction */ +#define IOR 12 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 68 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 1.8 /* parameter controlling the dimensions of domain */ +#define MU 0.9 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.666666666666 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 1 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.1 /* Courant number */ +#define COURANTB 0.05 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 20 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 3 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2400 /* number of frames of movie */ +#define NVID 7 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 300 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 1.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.00001 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.025 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 18 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 13 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 100.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 0.4 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 1 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 1 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 1 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +### 14 December 23 - Changing the anion/cation proportion in a mixture ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.01 /* x interval for initial condition */ +#define INITYMIN -1.1 +#define INITYMAX 1.17 /* y interval for initial condition */ + +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 1 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 0.1 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.01 /* parameter controlling radius of particles */ +#define MU_B 0.012 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 80 /* number of grid point for grid of disks */ +#define NGRIDY 40 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2900 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 3 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 5 +#define PLOT_B 13 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 0 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define PRINT_TYPE_PROP 1 /* print type proportion */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 30000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.5 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL -50.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.0001 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 1 /* set to 1 to add an electric field */ +#define EFIELD 1000000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 5.33333333333333 /* value of magnetic field */ +#define CHARGE -1.0 /* charge of particles of first type */ +#define CHARGE_B 2.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 1000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 200.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define CHANGE_TYPES 1 /* set to 1 to change type proportion in course of simulation */ +#define PROP_MIN 0.1 /* min proportion of type 1 particles */ +#define PROP_MAX 0.9 /* max proportion of type 1 particles */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 60 /* size of hashgrid in x direction */ +#define HASHY 30 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 13 December 23 - Linear waves crossing a lens angled at 45 and 60 degrees ### + +**Program:** `wave_billiard.c` + +**Initial condition in function `animation()`:** `init_wave_flat(phi, psi, xy_in);` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ +#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 67 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 2.6 /* parameter controlling the dimensions of domain */ +#define MU 1.11 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.5 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 1 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.1 /* Courant number */ +#define COURANTB 0.058 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 20 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 3 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2500 /* number of frames of movie */ +#define NVID 7 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 300 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 1.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.00001 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.025 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 12 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 100.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 0.4 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 1 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 1 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 1 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +**Part 2:** + +``` +#define APOLY -0.666666666666 /* angle by which to turn polygon, in units of Pi/2 */ +``` + +### 12 December 23 - Ions in an increasing electric field ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.01 /* x interval for initial condition */ +#define INITYMIN -1.1 +#define INITYMAX 1.17 /* y interval for initial condition */ + +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ + + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 1 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 0.35 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.01 /* parameter controlling radius of particles */ +#define MU_B 0.015 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 80 /* number of grid point for grid of disks */ +#define NGRIDY 40 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2700 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 3 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 13 +#define PLOT_B 5 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 0 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 2 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 30000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.5 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL -50.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.0001 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 1 /* set to 1 to add an electric field */ +#define EFIELD 5.33333333333333 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 5.33333333333333 /* value of magnetic field */ +#define CHARGE -1.0 /* charge of particles of first type */ +#define CHARGE_B 2.0 /* charge of particles of second type */ +#define INCREASE_E 1 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 1000000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 1000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 200.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ #define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ #define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ #define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ @@ -2427,7 +5544,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ #define PMAX 1000.0 /* maximal force */ -#define HASHX 60 /* size of hashgrid in x direction */ +#define HASHX 60 /* size of hashgrid in x direction */ #define HASHY 30 /* size of hashgrid in y direction */ #define HASHMAX 100 /* maximal number of particles per hashgrid cell */ #define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ @@ -2441,11 +5558,1884 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO ``` -### 22 October 23 - Flooding Mars ### +### 11 December 23 - Two lenses with a high index of refraction ### -**Program:** `earth_sealevel.c` (variant of `wave_sphere.c`) +**Program:** `wave_billiard.c` -**Part 1:** +**Initial condition in function `animation()`:** + +``` + init_wave_flat(phi, psi, xy_in); + + if ((ADD_OSCILLATING_SOURCE)&&(i%OSCILLATING_SOURCE_PERIOD == 1)) + { + if (ALTERNATE_OSCILLATING_SOURCE) sign = -sign; + add_circular_wave(sign, -1.75, 0.16, phi, psi, xy_in); + add_circular_wave(sign, -1.75, -0.16, phi, psi, xy_in); + } +``` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 1 /* set to 1 for a variable index of refraction */ +#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 63 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 1.5 /* parameter controlling the dimensions of domain */ +#define MU 0.7 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.666666666666 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.1 /* Courant number */ +#define COURANTB 0.03 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 1 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 20 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 2 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 3600 /* number of frames of movie */ +#define NVID 7 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 300 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 1.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.00001 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.025 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 12 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 100.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 0.4 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 1 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 1 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 1 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +### 10 December 23 - Ions in an electric field under temperature cycling ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.01 /* x interval for initial condition */ +#define INITYMIN -1.1 +#define INITYMAX 1.17 /* y interval for initial condition */ + +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ + + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 1 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 0.33 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.012 /* parameter controlling radius of particles */ +#define MU_B 0.018 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 85 /* number of grid point for grid of disks */ +#define NGRIDY 43 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2400 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 3 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 13 +#define PLOT_B 5 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 0 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 2 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 0 /* print number of active particles */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 30000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 1.5 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL -50.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.00002 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 1 /* set to 1 to add an electric field */ +#define EFIELD 500000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 5.33333333333333 /* value of magnetic field */ +#define CHARGE -2.0 /* charge of particles of first type */ +#define CHARGE_B 3.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 100000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 1000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 1 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 200.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 2.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 0 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 60 /* size of hashgrid in x direction */ +#define HASHY 30 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 09 December 23 - Linear waves crossing an angled lens ### + +**Program:** `wave_billiard.c` + +**Initial condition in function `animation()`:** `init_wave_flat(phi, psi, xy_in);` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ +#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 67 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 2.6 /* parameter controlling the dimensions of domain */ +#define MU 1.11 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY -0.1 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 1 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.01 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.1 /* Courant number */ +#define COURANTB 0.058 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 20 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 3 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2500 /* number of frames of movie */ +#define NVID 7 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 300 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 1.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.00001 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.025 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 12 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 100.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 0.4 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 1 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 1 /* set to 1 to draw a profile of the wave */ +#define VERTICAL_WAVE_PROFILE 1 /* set to 1 to draw wave profile vertically */ +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +**Part 2:** + +``` + #define APOLY -0.2 /* angle by which to turn polygon, in units of Pi/2 */ +``` + + +### 08 December 23 - Bloopers 12: Compressing ions and electrons with mass ratio 100 ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.01 /* x interval for initial condition */ +#define INITYMIN -1.1 +#define INITYMAX 1.17 /* y interval for initial condition */ + +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ + + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 1 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.008 /* parameter controlling radius of particles */ +#define MU_B 0.018 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 85 /* number of grid point for grid of disks */ +#define NGRIDY 43 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 4500 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 1 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 13 +#define PLOT_B 5 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 0 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 2 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 1 /* print number of active particles */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 30000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 100.0 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL -50.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.000005 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e11 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 2.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 100000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 5.33333333333333 /* value of magnetic field */ +#define CHARGE -1.0 /* charge of particles of first type */ +#define CHARGE_B 2.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 100000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 1000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 200.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 1 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1200 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 60 /* size of hashgrid in x direction */ +#define HASHY 30 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 07 December 23 - A binary zone plate ### + +**Program:** `wave_billiard.c` + +**Initial condition in function `animation()`:** + +``` + init_wave_flat(phi, psi, xy_in); + + if ((ADD_OSCILLATING_SOURCE)&&(i%OSCILLATING_SOURCE_PERIOD == 1)) + { + if (ALTERNATE_OSCILLATING_SOURCE) sign = -sign; + add_circular_wave(sign, -1.75, 0.25, phi, psi, xy_in); + add_circular_wave(sign, -1.75, -0.25, phi, psi, xy_in); + } +``` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ +#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +/* General geometrical parameters */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 65 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 103 /* pattern of circles or polygons, see list in global_pdes.c */ + +#define COMPARISON 0 /* set to 1 to compare two different patterns (beta) */ +#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ +#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.0 /* parameter controlling the dimensions of domain */ +#define MU 0.075 /* parameter controlling the dimensions of domain */ +#define NPOLY 6 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 6 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 60 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -2.9 +#define ISO_XSHIFT_RIGHT 1.4 +#define ISO_YSHIFT_LEFT -0.15 +#define ISO_YSHIFT_RIGHT -0.15 +#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 0 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ +#define OSCILLATION_SCHEDULE 0 /* oscillation schedule, see list in global_pdes.c */ + +#define OMEGA 0.024 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define ACHIRP 0.25 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.1 /* Courant number */ +#define COURANTB 0.063 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +#define OSCIL_LEFT_YSHIFT -400.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 1 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 20 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ + +#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ +#define WAVE_PACKET_SOURCE_TYPE 2 /* type of wave packet sources */ +#define N_WAVE_PACKETS 2 /* number of wave packets */ +#define WAVE_PACKET_RADIUS 25 /* radius of wave packets */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 2 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2500 /* number of frames of movie */ +#define NVID 7 /* number of iterations between images displayed on screen */ +#define NSEG 1000 /* number of segments of boundary */ +#define INITIAL_TIME 300 /* time after which to start saving frames */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ +#define PRINT_SPEED 0 /* print speed of moving source */ +#define PRINT_FREQUENCY 0 /* print frequency (for phased array) */ + +#define PAUSE 200 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 1.5 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.00001 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.025 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 /* plot type for second movie */ + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 12 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 100.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 1.25 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 180.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -180.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 0.4 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 1 /* set to 1 to draw color scheme horizontally */ +#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ +#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ + +#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ + +#define NXMAZE 8 /* width of maze */ +#define NYMAZE 32 /* height of maze */ +#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 0 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.02 /* half width of maze walls */ + +/* for compatibility with sub_wave and sub_maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +/* end of constants only used by sub_wave and sub_maze */ + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 10.0 /* max value of wave amplitude */ + +``` + +### 06 December 23 - Injecting electrons in a crystal of ions ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.01 /* x interval for initial condition */ +#define INITYMIN -1.1 +#define INITYMAX 1.17 /* y interval for initial condition */ + +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 1 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 0 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 0.55 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.008 /* parameter controlling radius of particles */ +#define MU_B 0.018 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 10 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 20 /* obstacles for O_HEX obstacle pattern */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 4750 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 3 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 5 +#define PLOT_B 5 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 4 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define PRINT_NPARTICLES 1 /* print number of active particles */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 30000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ +#define BG_FORCE_SLOPE 7.5e-8 /* contant in BG_FORCE backgound color scheme*/ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL -50.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.00002 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e10 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 100000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 5.33333333333333 /* value of magnetic field */ +#define CHARGE -1.0 /* charge of particles of first type */ +#define CHARGE_B 2.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 100000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 1000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 1000.0 /* Coulomb force constant for charged obstacles */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 200.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1000 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 1 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 4 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 3 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 30 /* size of hashgrid in x direction */ +#define HASHY 20 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 05 December 23 - Flooding Mercury ### + +**Program:** `earth_sealevel.c` + +**Part 1 (3D)** ``` #define MOVIE 1 /* set to 1 to generate movie */ @@ -2457,8 +7447,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define WINWIDTH 1920 /* window width */ #define WINHEIGHT 1150 /* window height */ -#define NX 4096 /* number of grid points on x axis */ -#define NY 2048 /* number of grid points on y axis */ +#define NX 2304 /* number of grid points on x axis */ +#define NY 1152 /* number of grid points on y axis */ #define DPOLE 20 /* safety distance to poles */ #define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ @@ -2478,7 +7468,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* Choice of the billiard table */ -#define B_DOMAIN 86 /* choice of domain shape, see list in global_pdes.c */ +#define B_DOMAIN 89 /* choice of domain shape, see list in global_pdes.c */ #define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ @@ -2628,7 +7618,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define ROTATE_ANGLE 720.0 /* total angle of rotation during simulation */ #define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ -#define VIEWPOINT_TRAJ 0 /* type of viewpoint trajectory */ +#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ /* Color schemes */ @@ -2707,14 +7697,17 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define SMOOTH_DEM 1 /* set to 1 to smoothen DEM (to make altitude less constant) */ #define DEM_SMOOTH_STEPS 5 /* number of smoothening steps */ #define DEM_SMOOTH_HEIGHT 1.0 /* relative height below which to smoothen */ -#define DEM_MAXHEIGHT 28000 /* max height of DEM (estimated from Everest) */ +#define DEM_MAXHEIGHT 9860 /* max height of DEM */ #define DEM_MAXDEPTH -10000 /* max depth of DEM */ +#define PLANET_SEALEVEL 0.0 /* sea level for flooded planet */ +#define VENUS_NODATA_FACTOR 0.5 /* altitude to assign to DEM points without data (fraction of mean altitude) */ -#define MAXHEIGHT 8000.0 /* max sea level height */ +#define MAXHEIGHT 5000.0 /* max sea level height */ #define MAXDEPTH 4000.0 /* max sea level depth */ #define RSCALE 0.01 /* scaling factor of radial component */ #define RMAX 10.0 /* max value of radial component */ +#define RMIN 0.5 /* min value of radial component */ #define Z_SCALING_FACTOR 0.8 /* overall scaling factor of z axis for REP_PROJ_3D representation */ #define XY_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ #define X_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ @@ -2726,285 +7719,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO ``` -**Part 2:** - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN -75.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.6 /* scaling for Julia sets */ -#define JULIA_ROT -20.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE 0.5 -#define JULIA_IM 0.462 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 3700 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 500 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 1 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 450.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 1 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 11 /* type of viewpoint trajectory */ -#define MAX_LATITUDE -45.0 /* maximal latitude for viewpoint trajectory VP_ORBIT2 */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 2.5 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {-0.816496581, 0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {-6.0, 3.0, 0.0}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define ADD_NEGATIVE_DEM 0 /* add DEM with bathymetric data */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 0 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 10 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 1.5 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.75 /* limit on cosine of normal to shown facets */ - -``` - -### 21 October 23 - How would the Earth look like with sinking sea levels ? ### - -**Program:** `earth_sealevel.c` (variant of `wave_sphere.c`) - -**Part 1:** +**Part 2 (2D)** ``` #define MOVIE 1 /* set to 1 to generate movie */ @@ -3016,3328 +7731,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define WINWIDTH 1920 /* window width */ #define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 180.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.25 /* scaling for Julia sets */ -#define JULIA_ROT 180.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE -0.77145 -#define JULIA_IM -0.10295 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 0 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 1 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 1 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 0 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 0 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 720.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {-0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {-8.0, 2.0, 6.5}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define ADD_NEGATIVE_DEM 1 /* add DEM with bathymetric data */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 1 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 5 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ -#define DEM_MAXDEPTH -10000 /* max depth of DEM */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.75 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define X_SCALING_FACTOR 2.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define Y_SCALING_FACTOR 2.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -**Part 2:** - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 0 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 180.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.25 /* scaling for Julia sets */ -#define JULIA_ROT 180.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE -0.77145 -#define JULIA_IM -0.10295 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 0 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 360.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {-0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {-8.0, 2.0, 6.5}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define ADD_NEGATIVE_DEM 1 /* add DEM with bathymetric data */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 1 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 5 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ -#define DEM_MAXDEPTH -10000 /* max depth of DEM */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.8 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define X_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define Y_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -**Part 3:** - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 0 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 180.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.25 /* scaling for Julia sets */ -#define JULIA_ROT 180.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE -0.77145 -#define JULIA_IM -0.10295 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 0 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 360.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {0.816496581, 0.40824829, -0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {8.0, -2.0, -6.5}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define ADD_NEGATIVE_DEM 1 /* add DEM with bathymetric data */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 1 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 5 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ -#define DEM_MAXDEPTH -10000 /* max depth of DEM */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.8 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define X_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define Y_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 20 October 23 - Prelude to the Coandă effect ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.0 -#define INITXMAX 2.03 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.1 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 24 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 2 /* choice of types, see TTC_ list in global_ljones.c */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ -#define MU 0.014 /* parameter controlling radius of particles */ -#define MU_B 0.008 /* parameter controlling radius of particles of second type */ -#define NPOLY 40 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 101 /* number of grid point for grid of disks */ -#define NGRIDY 47 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2200 /* number of frames of movie */ -#define NVID 25 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 250 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 5 -#define PLOT_B 11 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.0 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 1000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.25 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 1.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 0.02 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 5.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 400.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define V_INITIAL_TYPE 1 /* type of initial speed distribution (see VI_ in global_ljones.c) */ - -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.0002 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ -#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ -#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ADD_EFIELD 1 /* set to 1 to add an electric field */ -#define EFIELD 2000.0 /* value of electric field */ -#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ -#define BFIELD 1000.0 /* value of magnetic field */ -#define CHARGE 0.0 /* charge of particles of first type */ -#define CHARGE_B 1.0 /* charge of particles of second type */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 0 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX -2.0*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ -#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ -#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ -#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 60 /* size of hashgrid in x direction */ -#define HASHY 30 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 19 October 23 - Waves with cubic symmetry on a sphere, 2D representation ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** - -``` - init_wave_flat_sphere(phi, psi, xy_in, wsphere); - - for (j=0; j<3; j++) - { - a = circ_sphere[4].x; - b = circ_sphere[4].y; - c = 1.0 + circ_sphere[4].z; - theta = acos(c/sqrt(a*a + b*b + c*c)); - add_circular_wave_sphere(1.0,(double)j*DPI/3.0, PID - theta, phi, psi, xy_in, wsphere); - add_circular_wave_sphere(1.0,(double)j*DPI/3.0 + PI/3.0, theta - PID, phi, psi, xy_in, wsphere); - - a = circ_sphere[1].x; - b = circ_sphere[1].y; - c = 1.0 + circ_sphere[1].z; - theta = acos(c/sqrt(a*a + b*b + c*c)); - add_circular_wave_sphere(-1.0,(double)j*DPI/3.0 + PI/3.0, PID - theta, phi, psi, xy_in, wsphere); - add_circular_wave_sphere(-1.0,(double)j*DPI/3.0, theta - PID, phi, psi, xy_in, wsphere); - - add_circular_wave_sphere(-1.0,(double)j*DPI/3.0 + PI/6.0, 0.0, phi, psi, xy_in, wsphere); - add_circular_wave_sphere(-1.0,(double)j*DPI/3.0 - PI/6.0, 0.0, phi, psi, xy_in, wsphere); - } -``` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2000 /* number of grid points on x axis */ -#define NY 1000 /* number of grid points on y axis */ - -#define DPOLE 15 /* safety distance to poles */ -#define SMOOTHPOLE 0.0 /* smoothing coefficient at poles */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.25 /* scaling for Julia sets */ -#define JULIA_ROT 90.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE -0.77145 -#define JULIA_IM -0.10295 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 81 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 9 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 0 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.01 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 3600 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ -#define ROTATE_VIEW_WHILE_FADE 1 /* set to 1 to keep rotating viewpoint during fade */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.25 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.0005 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 112 -#define CPLOT_B 113 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 0 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 1 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 1 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 1 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 360.0 /* total angle of rotation during simulation */ - -#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 14 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 0 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 2.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {-0.40824829, 0.40824829, 0.816496581}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {5.0, -10.0, -7.0}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 5.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 18 October 23 - Pressure distribution around an airfoil in a granular medium ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.0 -#define INITXMAX 2.0 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.1 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 24 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 0 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.012 /* parameter controlling radius of particles */ -#define MU_B 0.010 /* parameter controlling radius of particles of second type */ -#define NPOLY 40 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 130 /* number of grid point for grid of disks */ -#define NGRIDY 65 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 250 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 13 -#define PLOT_B 11 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.0 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 1 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 1 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 1 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 100.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 0.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.0002 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ -#define GRAVITY_X 5000.0 /* horizontal gravity acting on all particles */ -#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ADD_EFIELD 0 /* set to 1 to add an electric field */ -#define EFIELD 50000.0 /* value of electric field */ -#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ -#define BFIELD 1000.0 /* value of magnetic field */ -#define CHARGE -1.0 /* charge of particles of first type */ -#define CHARGE_B 1.0 /* charge of particles of second type */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX -2.0*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ -#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ -#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ -#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 120 /* size of hashgrid in x direction */ -#define HASHY 60 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 17 October 23 - How much flooding would an asteroid impact in the Indian Ocean cause? 2D representation ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** `init_circular_wave_sphere(5.0, -0.6, phi, psi, xy_in, wsphere);` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 180.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.25 /* scaling for Julia sets */ -#define JULIA_ROT 180.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE -0.77145 -#define JULIA_IM -0.10295 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 500 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 0 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 1 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 1 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 75.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 2 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {3.0, -10.0, -8.0}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 0 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 10 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 16 October 23 - A simplified model for a plasma in strong electric and magenetic fields ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.0 -#define INITXMAX 2.01 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.17 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 0 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 23 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.008 /* parameter controlling radius of particles */ -#define MU_B 0.018 /* parameter controlling radius of particles of second type */ -#define NPOLY 3 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 70 /* number of grid point for grid of disks */ -#define NGRIDY 35 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 5600 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 250 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 5 -#define PLOT_B 14 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 1 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 0 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.0 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 2000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 50.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 50.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.0002 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ -#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ -#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ADD_EFIELD 1 /* set to 1 to add an electric field */ -#define EFIELD 50000.0 /* value of electric field */ -#define ADD_BFIELD 1 /* set to 1 to add a magnetic field */ -#define BFIELD 8000.0 /* value of magnetic field */ -#define CHARGE -1.0 /* charge of particles of first type */ -#define CHARGE_B 1.0 /* charge of particles of second type */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 1 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX 8.0*PI*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 80 /* size of hashgrid in x direction */ -#define HASHY 40 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 15 October 23 - How rising sea levels would affect the seven continents ### - -**Program:** `earth_sealevel.c` (variant of `wave_sphere.c`) - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 0 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 180.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.25 /* scaling for Julia sets */ -#define JULIA_ROT 180.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE -0.77145 -#define JULIA_IM -0.10295 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 0 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 0 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 720.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {0.40824829, -0.816496581, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {1.0, -10.0, 7.5}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 1 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 20 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.75 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define X_SCALING_FACTOR 2.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define Y_SCALING_FACTOR 2.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -**Part 2 (South America):** - -``` -double light[3] = {-0.40824829, -0.816496581, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {-3.0, -5.0, -2.5}; /* location of observer for REP_PROJ_3D representation */ -#define Z_SCALING_FACTOR 0.8 /* overall scaling factor of z axis for REP_PROJ_3D representation */ - -``` - -**Part 3 (Europe):** - -``` -double light[3] = {-0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {-8.0, 2.0, 6.5}; /* location of observer for REP_PROJ_3D representation */ -#define Z_SCALING_FACTOR 0.75 /* overall scaling factor of z axis for REP_PROJ_3D representation */ - -``` - -**Part 4 (Africa):** - -``` -double light[3] = {-0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {-8.0, 2.0, 0.0}; /* location of observer for REP_PROJ_3D representation */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ - -``` - -**Part 5 (Asia):** - -``` -double light[3] = {-0.816496581, 0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {0.0, 8.0, 4.5}; /* location of observer for REP_PROJ_3D representation */ -#define Z_SCALING_FACTOR 0.8 /* overall scaling factor of z axis for REP_PROJ_3D representation */ - -``` - -**Part 6 (Australia/Oceania):** - -``` -double light[3] = {0.816496581, 0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {6.0, 6.0, -2.5}; /* location of observer for REP_PROJ_3D representation */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ - -``` - -**Part 7 (Antarctica):** - -``` -double light[3] = {0.40824829, -0.816496581, -0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {0.1, -0.2, -8.5}; /* location of observer for REP_PROJ_3D representation */ -#define Z_SCALING_FACTOR 1.0 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define X_SCALING_FACTOR 3.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define Y_SCALING_FACTOR 2.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ - -``` - -### 14 October 23 - A simplified model for a plasma in electric and magenetic fields ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.0 -#define INITXMAX 2.01 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.17 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 0 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 23 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.008 /* parameter controlling radius of particles */ -#define MU_B 0.018 /* parameter controlling radius of particles of second type */ -#define NPOLY 3 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 70 /* number of grid point for grid of disks */ -#define NGRIDY 35 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 3600 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 250 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 5 -#define PLOT_B 14 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 1 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 0 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.0 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 2000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 50.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 50.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.0002 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ -#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ -#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ADD_EFIELD 1 /* set to 1 to add an electric field */ -#define EFIELD 50000.0 /* value of electric field */ -#define ADD_BFIELD 1 /* set to 1 to add a magnetic field */ -#define BFIELD 1000.0 /* value of magnetic field */ -#define CHARGE -1.0 /* charge of particles of first type */ -#define CHARGE_B 1.0 /* charge of particles of second type */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 1 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX 8.0*PI*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 80 /* size of hashgrid in x direction */ -#define HASHY 40 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 13 October 23 - How much flooding would an asteroid impact in the Indian Ocean cause? ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** `init_circular_wave_sphere(5.0, -0.6, phi, psi, xy_in, wsphere);` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ +#define NX 2304 /* number of grid points on x axis */ +#define NY 1152 /* number of grid points on y axis */ #define DPOLE 20 /* safety distance to poles */ #define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ @@ -6357,2004 +7752,7 @@ double observer[3] = {0.1, -0.2, -8.5}; /* location of observer for REP_PROJ_ /* Choice of the billiard table */ -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 500 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 75.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 2 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {3.0, -10.0, -8.0}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 0 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 10 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 12 October 23 - A simplified model for a plasma in an electric field ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.0 -#define INITXMAX 2.01 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.17 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 0 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 23 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.008 /* parameter controlling radius of particles */ -#define MU_B 0.018 /* parameter controlling radius of particles of second type */ -#define NPOLY 3 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 70 /* number of grid point for grid of disks */ -#define NGRIDY 35 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2800 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 250 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 5 -#define PLOT_B 14 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 1 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 1.5 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 2000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 50.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 0.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.02 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ -#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ -#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ADD_EFIELD 1 /* set to 1 to add an electric field */ -#define EFIELD 100000.0 /* value of electric field */ -#define CHARGE -1.0 /* charge of particles of first type */ -#define CHARGE_B 1.0 /* charge of particles of second type */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 1 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX 8.0*PI*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 80 /* size of hashgrid in x direction */ -#define HASHY 40 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 11 October 23 - What kind of waves would a Campi Flegrei eruption cause in the Mediterranean? ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** `init_circular_wave_sphere(-14.139*PI/180.0, 40.827*PI/180.0, phi, psi, xy_in, wsphere);` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 3750 /* number of grid points on x axis */ -#define NY 1920 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 0.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.6 /* scaling for Julia sets */ -#define JULIA_ROT -20.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE 0.5 -#define JULIA_IM 0.462 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 0 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.025 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 1500 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 500 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.25 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.00005 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.002 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 0 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 1 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 0 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 0 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 720.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 1 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 0 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 0.75 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 2.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 1 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {-0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {8.0, -2.0, 5.5}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define ADD_NEGATIVE_DEM 0 /* add DEM with bathymetric data */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 0 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 10 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ - -#define RSCALE 0.05 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.75 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 3.5 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 10 October 23 - Phase separation in a granular mixture starting in a chessboard configuration ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.0 -#define INITXMAX 2.01 /* x interval for initial condition */ -#define INITYMIN -1.1 -#define INITYMAX 1.17 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 0 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 1 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 23 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 1 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define TWOTYPE_CONFIG 1 /* choice of types, see TTC_ list in global_ljones.c */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.014 /* parameter controlling radius of particles */ -#define MU_B 0.010 /* parameter controlling radius of particles of second type */ -#define NPOLY 3 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 132 /* number of grid point for grid of disks */ -#define NGRIDY 68 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 2900 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 5 -#define PLOT_B 11 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 1 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.5 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 0 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 100.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 5.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 0.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.02 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 500.0 /* gravity acting on all particles */ -#define GRAVITY_X 5000.0 /* horizontal gravity acting on all particles */ -#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 1 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX 8.0*PI*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 120 /* size of hashgrid in x direction */ -#define HASHY 60 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 9 October 23 - How much flooding would an asteroid impact in the North Atlantic cause? 2D representation ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** `init_circular_wave_sphere(0.7, 0.5, phi, psi, xy_in, wsphere);` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 180.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.25 /* scaling for Julia sets */ -#define JULIA_ROT 180.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE -0.77145 -#define JULIA_IM -0.10295 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 3000 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 0 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 1 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 1 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 0 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE -360.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {7.0, 7.0, 4.5}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 7 October 23 - A granular material in a blender with a harmonic potential ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.03 -#define INITXMAX 2.03 /* x interval for initial condition */ -#define INITYMIN -1.125 -#define INITYMAX 1.135 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 23 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 0 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.012 /* parameter controlling radius of particles */ -#define MU_B 0.012 /* parameter controlling radius of particles of second type */ -#define NPOLY 3 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 130 /* number of grid point for grid of disks */ -#define NGRIDY 65 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 3200 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 11 -#define PLOT_B 14 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 1 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 1 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.5 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 1 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 1 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 100.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 0.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.02 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 10000.0 /* gravity acting on all particles */ -#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ -#define CIRCULAR_GRAVITY 1 /* set to 1 to have gravity directed to center */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.25 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 1 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX 8.0*PI*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 120 /* size of hashgrid in x direction */ -#define HASHY 60 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 6 October 23 - Waves on a planet with a cubic Julia set continent ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** -``` - init_circular_wave_sphere(1.0, 0.4, phi, psi, xy_in, wsphere); - add_circular_wave_sphere(1.0, 1.0 + DPI/3.0, 0.4, phi, psi, xy_in, wsphere); - add_circular_wave_sphere(1.0, 1.0 + 2.0*DPI/3.0, 0.4, phi, psi, xy_in, wsphere); -``` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ -#define ZERO_MERIDIAN 0.0 /* choice of zero meridian (will be at left/right boundary of 2d plot) */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.8 /* scaling for Julia sets */ -#define JULIA_ROT 0.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE 0.5 -#define JULIA_IM 0.462 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 85 /* choice of domain shape, see list in global_pdes.c */ +#define B_DOMAIN 89 /* choice of domain shape, see list in global_pdes.c */ #define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ @@ -8448,667 +7846,6 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define BOUNDARY_WIDTH 2 /* width of billiard boundary */ #define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 500 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP -0.5 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.001 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ -#define FLOODING 0 /* set to 1 to draw waves above altitude (for Earth representations) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 720.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 1 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 0 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 18 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 12 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 0.75 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 2.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {3.0, -10.0, 5.0}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 0 /* add DEM (digital elevation model) */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ -#define SMOOTH_DEM 0 /* set to 1 to smoothen DEM (to make altitude less constant) */ -#define DEM_SMOOTH_STEPS 10 /* number of smoothening steps */ -#define DEM_MAXHEIGHT 8000 /* max height of DEM (estimated from Everest) */ - -#define RSCALE 0.05 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 5 October 23 - A blender rotating at higher speed (without gravity) ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.03 -#define INITXMAX 2.03 /* x interval for initial condition */ -#define INITYMIN -1.125 -#define INITYMAX 1.135 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 23 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 0 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.012 /* parameter controlling radius of particles */ -#define MU_B 0.012 /* parameter controlling radius of particles of second type */ -#define NPOLY 3 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 130 /* number of grid point for grid of disks */ -#define NGRIDY 65 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 4200 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 11 -#define PLOT_B 14 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 1 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 1 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.5 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 1 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 1 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 100.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 0.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.02 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ -#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.25 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 1 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX 8.0*PI*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 120 /* size of hashgrid in x direction */ -#define HASHY 60 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 4 October 23 - How much flooding would an asteroid impact in the North Atlantic cause? ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** `init_circular_wave_sphere(0.7, 0.5, phi, psi, xy_in, wsphere);` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 2560 /* number of grid points on x axis */ -#define NY 1280 /* number of grid points on y axis */ - -#define DPOLE 20 /* safety distance to poles */ -#define SMOOTHPOLE 0.1 /* smoothing coefficient at poles */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.25 /* scaling for Julia sets */ -#define JULIA_ROT 90.0 /* rotation of Julia set, in degrees */ -#define JULIA_RE -0.77145 -#define JULIA_IM -0.10295 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 84 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 33 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.002 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 3000 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - #define PAUSE 100 /* number of frames after which to pause */ #define PSLEEP 3 /* sleep time during pause */ #define SLEEP1 1 /* initial sleeping time */ @@ -9131,677 +7868,6 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define ZPLOT_B 108 #define CPLOT_B 108 /* plot type for second movie */ -#define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ -#define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ -#define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ -#define SHADE_3D 1 /* set to 1 to change luminosity according to normal vector */ -#define SHADE_2D 0 /* set to 1 to change luminosity according to normal vector to plane */ -#define SHADE_WAVE 1 /* set to 1 to have luminosity depend on wave height */ -#define NON_DIRICHLET_BC 0 /* set to 1 to draw only facets in domain, if field is not zero on boundary */ -#define FLOOR_ZCOORD 1 /* set to 1 to draw only facets with z not too negative */ -#define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ -#define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ -#define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ -#define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ -#define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ -#define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ -#define COS_LIGHT_MAX 0.8 /* controls angle-dependence of 2D shading */ - -#define PLOT_SCALE_ENERGY 0.4 /* vertical scaling in energy plot */ -#define PLOT_SCALE_LOG_ENERGY 0.5 /* vertical scaling in log energy plot */ - -/* 3D representation */ - -#define REPRESENTATION_3D 1 /* choice of 3D representation */ -#define PLOT_2D 0 /* switch to 2D representation, equirectangular projection */ -#define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ - -#define REP_AXO_3D 0 /* linear projection (axonometry) */ -#define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ - -#define ROTATE_VIEW 0 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE -360.0 /* total angle of rotation during simulation */ -#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ - -#define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ - -/* Color schemes */ - -#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ - -#define BLACK 1 /* background */ -#define COLOR_OUT_R 1.0 /* color outside domain */ -#define COLOR_OUT_G 1.0 -#define COLOR_OUT_B 1.0 - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ -#define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ -#define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ -#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ -#define E_SCALE 150.0 /* scaling factor for energy representation */ -#define LOG_SCALE 0.75 /* scaling factor for energy log representation */ -#define LOG_SHIFT 0.5 /* shift of colors on log scale */ -#define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ -#define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ -#define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ -#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 240.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -200.0 /* amplitude of variation of hue for color scheme C_HUE */ - -#define NXMAZE 8 /* width of maze */ -#define NYMAZE 32 /* height of maze */ -#define MAZE_MAX_NGBH 5 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 5 /* seed of random number generator */ -#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.02 /* half width of maze walls */ - -#define DRAW_COLOR_SCHEME 1 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ -#define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ -#define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ - -#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ -#define SAVE_TIME_SERIES 0 /* set to 1 to save wave time series at a point */ - -#define ADD_POTENTIAL 0 /* set to 1 to add potential to z coordinate */ -#define POTENTIAL 10 -#define POT_FACT 20.0 -/* end of constants only used by sub_wave and sub_maze */ - - -/* For debugging purposes only */ -#define FLOOR 1 /* set to 1 to limit wave amplitude to VMAX */ -#define VMAX 10.0 /* max value of wave amplitude */ - -/* Parameters controlling 3D projection */ - -double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ -double v_3d[2] = {-0.75, -0.45}; -double w_3d[2] = {0.0, 0.015}; -double light[3] = {0.816496581, -0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {7.0, 7.0, 4.5}; /* location of observer for REP_PROJ_3D representation */ -int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ - -#define ADD_DEM 1 /* add DEM (digital elevation model) */ -#define RSCALE_DEM 0.1 /* scaling factor of radial component for DEM */ - -#define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 10.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ -#define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ -#define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ -#define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ -#define COS_VISIBLE -0.5 /* limit on cosine of normal to shown facets */ - -``` - -### 3 October 23 - Dislocation dynamics around an irreversible blender in a granular medium ### - -**Program:** `lennardjones.c` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ - /* so far incompatible with double movie */ -#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ -#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ - -#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ - -/* General geometrical parameters */ - -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.125 -#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ - -#define INITXMIN -2.03 -#define INITXMAX 2.03 /* x interval for initial condition */ -#define INITYMIN -1.125 -#define INITYMAX 1.135 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ - - -#define BCXMIN -2.0 -#define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ - -#define OBSXMIN -2.0 -#define OBSXMAX 2.0 /* x interval for motion of obstacle */ - -#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ - -#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ -#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ - -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ - -#define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 23 /* pattern of repelling segments, see list in global_ljones.c */ -#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ -#define ROCKET_SHAPE_B 3 /* shape of second rocket */ -#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ -#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ - -#define TWO_TYPES 0 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ -#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ -#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ -#define CENTER_PY 0 /* set to 1 to center vertical momentum */ -#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ - -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ -#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ -#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ -#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ -#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.012 /* parameter controlling radius of particles */ -#define MU_B 0.012 /* parameter controlling radius of particles of second type */ -#define NPOLY 3 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ -#define MDEPTH 4 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 130 /* number of grid point for grid of disks */ -#define NGRIDY 65 /* number of grid point for grid of disks */ -#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ -#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ -#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ -#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 3300 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ -#define NSEG 25 /* number of segments of boundary of circles */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ -#define BOUNDARY_WIDTH 1 /* width of particle boundary */ -#define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ - -#define PAUSE 1000 /* number of frames after which to pause */ -#define PSLEEP 1 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ - -/* Boundary conditions, see list in global_ljones.c */ - -#define BOUNDARY_COND 3 - -/* Plot type, see list in global_ljones.c */ - -#define PLOT 1 -#define PLOT_B 15 /* plot type for second movie */ - -#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ -#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ -#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ -#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 1 /* set to 1 to collor segment groups differently */ -#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 1 /* type of initial position dependence */ -#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ -#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ - -/* Color schemes */ - -#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ -#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ -#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ -#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ - -#define BLACK 1 /* background */ - -#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ - -#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ -#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ - -#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ -#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ -#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ -#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ -#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ -#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.5 /* shift in color hue (for some cyclic palettes) */ - -#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ -#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 1 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 1 /* set to 1 to print angular speed */ -#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ -#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ -#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ -#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ - -/* particle properties */ - -#define ENERGY_HUE_MIN 330.0 /* color of original particle */ -#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ -#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ -#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ -#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ -#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ -#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ -#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ - -#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ -#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ -#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ -#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 100.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ -#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ -#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU */ -#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ -#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 0.0 /* initial velocity range */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ -#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ - -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ -#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ -#define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.02 /* initial inverse temperature */ -#define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ -#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ -#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ -#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ -#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ -#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ -#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ -#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ -#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ -#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ - -#define ROTATION 0 /* set to 1 to include rotation of particles */ -#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ -#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ -#define KTORQUE 50.0 /* force constant in angular dynamics */ -#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ -#define KTORQUE_B 10.0 /* force constant in angular dynamics */ -#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ -#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ -#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ -#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ -#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ -#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ - -#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ -#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ -#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ -#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ - -#define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ -#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ -#define COMPRESSION_RATIO 0.3 /* final size of container */ -#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ - -#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ -#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ -#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ -#define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.25 /* radius of obstacle for circle boundary conditions */ -#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ -#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ -#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ -#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ -#define N_PRESSURES 100 /* number of intervals to record pressure */ -#define N_P_AVERAGE 100 /* size of pressure averaging window */ -#define N_T_AVERAGE 1 /* size of temperature averaging window */ -#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ -#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ -#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ -#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ -#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ -#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ - -#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ -#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ - -#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ -#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ -#define NPART_BOTTOM 100 /* number of particles at the bottom */ - -#define ADD_PARTICLES 0 /* set to 1 to add particles */ -#define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ -#define N_ADD_PARTICLES 2 /* number of particles to add */ -#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ -#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ - -#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ -#define N_TRACER_PARTICLES 3 /* number of tracer particles */ -#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ -#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ -#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ - -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ -#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 1 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ -#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ -#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ -#define ROTATE_FINAL_TIME 300 /* final time without rotation */ -#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX 2.0*PI*PI /* maximal rotation speed */ - -#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ -#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ -#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ -#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ -#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ -#define SEGMENTS_X0 1.5 /* initial position of segments */ -#define SEGMENTS_Y0 0.0 /* initial position of segments */ -#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ -#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ -#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ - -#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ -#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ -#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ -#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ -#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ -#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ -#define GROUP_WIDTH 0.05 /* interaction width of groups */ -#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ -#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ -#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ -#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ - -#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ -#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ -#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ -#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ -#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ - -#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ -#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ -#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ -#define RD_INITIAL_COND 9 /* initial condition of particles */ -#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ -#define REACTION_PROB 1.0 /* probability controlling reaction term */ -#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ -#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ -#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ -#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ -#define COLLISION_TIME 15 /* time during which collisions are shown */ - -#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ -#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ - -#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ -#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ -#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ -#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ -#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ -#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ -#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ - -#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ - -#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ -#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ -#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ -#define WALL_VMAX 100.0 /* max speed of wall */ -#define WALL_TIME 0 /* time during which to keep wall */ - -#define NXMAZE 12 /* width of maze */ -#define NYMAZE 12 /* height of maze */ -#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ -#define RAND_SHIFT 4 /* seed of random number generator */ -#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ -#define MAZE_WIDTH 0.01 /* width of maze walls */ - -#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ -#define FMAX 1.0e9 /* maximal force */ -#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ -#define PMAX 1000.0 /* maximal force */ - -#define HASHX 120 /* size of hashgrid in x direction */ -#define HASHY 60 /* size of hashgrid in y direction */ -#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ -#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ - -#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ -#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ -#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ - -#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ - -``` - -### 2 October 23 - ### - -**Program:** `wave_sphere.c` - -**Initial condition in function `animation()`:** - -``` - init_wave_flat_sphere(phi, psi, xy_in, wsphere); - - theta = asin(1.0/sqrt(3.0)); - for (j=0; j<4; j++) - { - if (j%2 == 0) amp = 1.0; - else amp = -1.0; - add_circular_wave_sphere(amp,((double)j+0.5)*PID, theta, phi, psi, xy_in, wsphere); - add_circular_wave_sphere(-amp,((double)j+0.5)*PID, -theta, phi, psi, xy_in, wsphere); - } - -``` - -``` -#define MOVIE 1 /* set to 1 to generate movie */ -#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ -#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ -#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ - -/* General geometrical parameters */ - -#define WINWIDTH 1920 /* window width */ -#define WINHEIGHT 1150 /* window height */ -#define NX 1920 /* number of grid points on x axis */ -#define NY 1180 /* number of grid points on y axis */ - -#define DPOLE 15 /* safety distance to poles */ -#define SMOOTHPOLE 0.0 /* smoothing coefficient at poles */ - -#define XMIN -2.0 -#define XMAX 2.0 /* x interval */ -#define YMIN -1.041666667 -#define YMAX 1.041666667 /* y interval for 9/16 aspect ratio */ - -#define HIGHRES 0 /* set to 1 if resolution of grid is double that of displayed image */ - -#define JULIA_SCALE 0.4 /* scaling for Julia sets */ -#define JULIA_RE 0.37468 -#define JULIA_IM 0.21115 /* parameters for Julia sets */ - -/* Choice of the billiard table */ - -#define B_DOMAIN 81 /* choice of domain shape, see list in global_pdes.c */ - -#define CIRCLE_PATTERN 32 /* pattern of circles or polygons, see list in global_pdes.c */ - -#define COMPARISON 0 /* set to 1 to compare two different patterns */ -#define B_DOMAIN_B 20 /* second domain shape, for comparisons */ -#define CIRCLE_PATTERN_B 0 /* second pattern of circles or polygons */ - -#define VARIABLE_IOR 0 /* set to 1 for a variable index of refraction */ -#define IOR 9 /* choice of index of refraction, see list in global_pdes.c */ -#define IOR_TOTAL_TURNS 1.0 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ -#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ - -#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ -#define NPOISSON 1000 /* number of points for Poisson C_RAND_POISSON arrangement */ -#define RANDOM_POLY_ANGLE 1 /* set to 1 to randomize angle of polygons */ - -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.1 /* parameter controlling the dimensions of domain */ -#define NPOLY 6 /* number of sides of polygon */ -#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ -#define MDEPTH 7 /* depth of computation of Menger gasket */ -#define MRATIO 3 /* ratio defining Menger gasket */ -#define MANDELLEVEL 2000 /* iteration level for Mandelbrot set */ -#define MANDELLIMIT 20.0 /* limit value for approximation of Mandelbrot set */ -#define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 30 /* number of grid point for grid of disks */ -#define NGRIDY 18 /* number of grid point for grid of disks */ - -#define X_SHOOTER -0.2 -#define Y_SHOOTER -0.6 -#define X_TARGET 0.4 -#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ - -#define ISO_XSHIFT_LEFT -2.9 -#define ISO_XSHIFT_RIGHT 1.4 -#define ISO_YSHIFT_LEFT -0.15 -#define ISO_YSHIFT_RIGHT -0.15 -#define ISO_SCALE 0.5 /* coordinates for isospectral billiards */ - - -/* You can add more billiard tables by adapting the functions */ -/* xy_in_billiard and draw_billiard below */ - -/* Physical parameters of wave equation */ - -#define TWOSPEEDS 0 /* set to 1 to replace hardcore boundary by medium with different speed */ -#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ -#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ -#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ - -#define OMEGA 0.001 /* frequency of periodic excitation */ -#define AMPLITUDE 0.8 /* amplitude of periodic excitation */ -#define ACHIRP 0.2 /* acceleration coefficient in chirp */ -#define DAMPING 0.0 /* damping of periodic excitation */ -#define COURANT 0.05 /* Courant number */ -#define COURANTB 0.01 /* Courant number in medium B */ -#define GAMMA 0.0 /* damping factor in wave equation */ -#define GAMMAB 1.0e-6 /* damping factor in wave equation */ -#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ -#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ -#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ -#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ -#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ -#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ -/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ -/* The physical damping coefficient is given by GAMMA/(DT)^2 */ -/* Increasing COURANT speeds up the simulation, but decreases accuracy */ -/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ - -#define ADD_OSCILLATING_SOURCE 0 /* set to 1 to add an oscillating wave source */ -#define OSCILLATING_SOURCE_PERIOD 30 /* period of oscillating source */ -#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ - -#define ADD_WAVE_PACKET_SOURCES 0 /* set to 1 to add several sources emitting wave packets */ -#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ -#define N_WAVE_PACKETS 15 /* number of wave packets */ -#define WAVE_PACKET_RADIUS 20 /* radius of wave packets */ - -/* Boundary conditions, see list in global_pdes.c */ - -#define B_COND 2 - -#define PRECOMPUTE_BC 0 /* set to 1 to compute neighbours for Laplacian in advance */ - -/* Parameters for length and speed of simulation */ - -#define NSTEPS 3900 /* number of frames of movie */ -#define NVID 4 /* number of iterations between images displayed on screen */ -#define NSEG 1000 /* number of segments of boundary */ -#define INITIAL_TIME 0 /* time after which to start saving frames */ -#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ -#define PRINT_SPEED 0 /* set to 1 to print speed of moving source */ - -#define PAUSE 100 /* number of frames after which to pause */ -#define PSLEEP 3 /* sleep time during pause */ -#define SLEEP1 1 /* initial sleeping time */ -#define SLEEP2 1 /* final sleeping time */ -#define MID_FRAMES 100 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ -#define FADE 1 /* set to 1 to fade at end of movie */ -#define ROTATE_VIEW_WHILE_FADE 1 /* set to 1 to keep rotating viewpoint during fade */ - -/* Parameters of initial condition */ - -#define INITIAL_AMP 0.25 /* amplitude of initial condition */ -#define INITIAL_VARIANCE 0.0005 /* variance of initial condition */ -#define INITIAL_WAVELENGTH 0.05 /* wavelength of initial condition */ - -/* Plot type, see list in global_pdes.c */ - -#define ZPLOT 103 /* wave height */ -#define CPLOT 103 /* color scheme */ - -#define ZPLOT_B 108 -#define CPLOT_B 108 /* plot type for second movie */ - #define CHANGE_LUMINOSITY 1 /* set to 1 to let luminosity depend on energy flux intensity */ #define FLUX_WINDOW 30 /* size of averaging window of flux intensity */ #define AMPLITUDE_HIGH_RES 1 /* set to 1 to increase resolution of plot */ @@ -9813,7 +7879,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define DRAW_BILLIARD 0 /* set to 1 to draw boundary */ #define DRAW_BILLIARD_FRONT 0 /* set to 1 to draw front of boundary after drawing wave */ #define DRAW_CONSTRUCTION_LINES 0 /* set to 1 to draw construction lines of certain domains */ -#define FADE_IN_OBSTACLE 1 /* set to 1 to fade color inside obstacles */ +#define FADE_IN_OBSTACLE 0 /* set to 1 to fade color inside obstacles */ #define DRAW_OUTSIDE_GRAY 0 /* experimental, draw outside of billiard in gray */ #define SHADE_SCALE_2D 10.0 /* controls "depth" of 2D shading */ #define COS_LIGHT_MIN 0.0 /* controls angle-dependence of 2D shading */ @@ -9827,19 +7893,21 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define REPRESENTATION_3D 1 /* choice of 3D representation */ #define PLOT_2D 1 /* switch to 2D representation, equirectangular projection */ #define PHISHIFT 0.0 /* shift of phi in 2D plot (in degrees) */ +#define FLOODING 1 /* set to 1 to draw waves above altitude (for Earth representations) */ #define REP_AXO_3D 0 /* linear projection (axonometry) */ #define REP_PROJ_3D 1 /* projection on plane orthogonal to observer line of sight */ #define ROTATE_VIEW 1 /* set to 1 to rotate position of observer */ -#define ROTATE_ANGLE 360.0 /* total angle of rotation during simulation */ +#define ROTATE_ANGLE 720.0 /* total angle of rotation during simulation */ +#define ROTATE_VIEW_WHILE_FADE 0 /* set to 1 to keep rotating viewpoint during fade */ #define VIEWPOINT_TRAJ 1 /* type of viewpoint trajectory */ /* Color schemes */ -#define COLOR_PALETTE 12 /* Color palette, see list in global_pdes.c */ -#define COLOR_PALETTE_B 14 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE 11 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 16 /* Color palette, see list in global_pdes.c */ #define BLACK 1 /* background */ #define COLOR_OUT_R 1.0 /* color outside domain */ @@ -9849,8 +7917,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ #define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ -#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ -#define VSCALE_AMPLITUDE 1.5 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define VSCALE_AMPLITUDE 1.0 /* additional scaling factor for color scheme P_3D_AMPLITUDE */ #define VSCALE_ENERGY 4.0 /* additional scaling factor for color scheme P_3D_ENERGY */ #define PHASE_FACTOR 20.0 /* factor in computation of phase in color scheme P_3D_PHASE */ #define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ @@ -9860,7 +7928,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define LOG_SHIFT 0.5 /* shift of colors on log scale */ #define LOG_ENERGY_FLOOR -10.0 /* floor value for log of (total) energy */ #define LOG_MEAN_ENERGY_SHIFT 1.0 /* additional shift for log of mean energy */ -#define FLUX_SCALE 2000.0 /* scaling factor for energy flux representation */ +#define FLUX_SCALE 1200.0 /* scaling factor for energy flux representation */ #define FLUX_CSCALE 2.0 /* scaling factor for color in energy flux representation */ #define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ @@ -9880,7 +7948,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ #define COLORBAR_RANGE 3.0 /* scale of color scheme bar */ -#define COLORBAR_RANGE_B 2.0 /* scale of color scheme bar for 2nd part */ +#define COLORBAR_RANGE_B 3.0 /* scale of color scheme bar for 2nd part */ #define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ #define CIRC_COLORBAR 0 /* set to 1 to draw circular color scheme */ #define CIRC_COLORBAR_B 0 /* set to 1 to draw circular color scheme */ @@ -9903,14 +7971,31 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO double u_3d[2] = {0.75, -0.45}; /* projections of basis vectors for REP_AXO_3D representation */ double v_3d[2] = {-0.75, -0.45}; double w_3d[2] = {0.0, 0.015}; -double light[3] = {-0.40824829, 0.40824829, 0.816496581}; /* vector of "light" direction for P_3D_ANGLE color scheme */ -double observer[3] = {5.0, -10.0, -7.0}; /* location of observer for REP_PROJ_3D representation */ +double light[3] = {0.816496581, 0.40824829, 0.40824829}; /* vector of "light" direction for P_3D_ANGLE color scheme */ +double observer[3] = {0.0, 8.0, 2.5}; /* location of observer for REP_PROJ_3D representation */ int reset_view = 0; /* switch to reset 3D view parameters (for option ROTATE_VIEW) */ +#define ADD_DEM 1 /* add DEM (digital elevation model) */ +#define ADD_NEGATIVE_DEM 0 /* add DEM with bathymetric data */ +#define RSCALE_DEM 0.15 /* scaling factor of radial component for DEM */ +#define SMOOTH_DEM 1 /* set to 1 to smoothen DEM (to make altitude less constant) */ +#define DEM_SMOOTH_STEPS 5 /* number of smoothening steps */ +#define DEM_SMOOTH_HEIGHT 1.0 /* relative height below which to smoothen */ +#define DEM_MAXHEIGHT 9860 /* max height of DEM */ +#define DEM_MAXDEPTH -10000 /* max depth of DEM */ +#define PLANET_SEALEVEL 0.0 /* sea level for flooded planet */ +#define VENUS_NODATA_FACTOR 0.5 /* altitude to assign to DEM points without data (fraction of mean altitude) */ + +#define MAXHEIGHT 5000.0 /* max sea level height */ +#define MAXDEPTH 4000.0 /* max sea level depth */ + #define RSCALE 0.01 /* scaling factor of radial component */ -#define RMAX 5.0 /* max value of radial component */ -#define Z_SCALING_FACTOR 0.85 /* overall scaling factor of z axis for REP_PROJ_3D representation */ -#define XY_SCALING_FACTOR 2.0 /* overall scaling factor for on-screen (x,y) coordinates after projection */ +#define RMAX 10.0 /* max value of radial component */ +#define RMIN 0.5 /* min value of radial component */ +#define Z_SCALING_FACTOR 0.8 /* overall scaling factor of z axis for REP_PROJ_3D representation */ +#define XY_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ +#define X_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ +#define Y_SCALING_FACTOR 2.2 /* overall scaling factor for on-screen (x,y) coordinates after projection */ #define ZMAX_FACTOR 1.0 /* max value of z coordinate for REP_PROJ_3D representation */ #define XSHIFT_3D 0.0 /* overall x shift for REP_PROJ_3D representation */ #define YSHIFT_3D 0.0 /* overall y shift for REP_PROJ_3D representation */ @@ -9918,7 +8003,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO ``` -### 1 October 23 - How irreversible is the effect of a blender in a granular medium? ### +### 04 December 23 - The Hall effect in a crystal with an increasing magnetic field ### **Program:** `lennardjones.c` @@ -9937,29 +8022,28 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* General geometrical parameters */ -#define WINWIDTH 1280 /* window width */ -#define WINHEIGHT 720 /* window height */ +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ #define XMIN -2.0 #define XMAX 2.0 /* x interval */ #define YMIN -1.125 #define YMAX 1.125 /* y interval for 9/16 aspect ratio */ -#define INITXMIN -2.03 -#define INITXMAX 2.03 /* x interval for initial condition */ -#define INITYMIN -1.125 -#define INITYMAX 1.135 /* y interval for initial condition */ - -#define ADDXMIN -1.97 -#define ADDXMAX -0.8 /* x interval for adding particles */ -#define ADDYMIN -1.125 -#define ADDYMAX 1.125 /* y interval for adding particles */ +#define INITXMIN -2.0 +#define INITXMAX 2.01 /* x interval for initial condition */ +#define INITYMIN -1.1 +#define INITYMAX 1.17 /* y interval for initial condition */ +#define ADDXMIN 1.9 +#define ADDXMAX 2.0 /* x interval for adding particles */ +#define ADDYMIN -0.9 +#define ADDYMAX 0.9 /* y interval for adding particles */ #define BCXMIN -2.0 #define BCXMAX 2.0 /* x interval for boundary condition */ -#define BCYMIN -1.125 -#define BCYMAX 1.125 /* y interval for boundary condition */ +#define BCYMIN -1.25 +#define BCYMAX 1.25 /* y interval for boundary condition */ #define OBSXMIN -2.0 #define OBSXMAX 2.0 /* x interval for motion of obstacle */ @@ -9969,25 +8053,26 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ #define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ -#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ -#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ +#define ADD_FIXED_OBSTACLES 1 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 6 /* pattern of obstacles, see list in global_ljones.c */ #define ADD_FIXED_SEGMENTS 1 /* set to 1 to add fixed segments as obstacles */ -#define SEGMENT_PATTERN 23 /* pattern of repelling segments, see list in global_ljones.c */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ #define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ #define ROCKET_SHAPE_B 3 /* shape of second rocket */ #define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ #define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ #define TWO_TYPES 0 /* set to 1 to have two types of particles */ -#define TYPE_PROPORTION 0.5 /* proportion of particles of first type */ +#define TYPE_PROPORTION 0.55 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ #define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ #define CENTER_PX 0 /* set to 1 to center horizontal momentum */ #define CENTER_PY 0 /* set to 1 to center vertical momentum */ #define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ -#define INTERACTION 1 /* particle interaction, see list in global_ljones.c */ -#define INTERACTION_B 1 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ #define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ #define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ @@ -9997,10 +8082,10 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ #define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ -#define LAMBDA 0.75 /* parameter controlling the dimensions of domain */ -#define MU 0.012 /* parameter controlling radius of particles */ -#define MU_B 0.012 /* parameter controlling radius of particles of second type */ -#define NPOLY 3 /* number of sides of polygon */ +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.008 /* parameter controlling radius of particles */ +#define MU_B 0.018 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ #define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ #define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ #define MDEPTH 4 /* depth of computation of Menger gasket */ @@ -10008,12 +8093,14 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ #define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ #define FOCI 1 /* set to 1 to draw focal points of ellipse */ -#define NGRIDX 130 /* number of grid point for grid of disks */ -#define NGRIDY 65 /* number of grid point for grid of disks */ +#define NGRIDX 10 /* number of grid point for grid of disks */ +#define NGRIDY 10 /* number of grid point for grid of disks */ #define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ #define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ #define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ #define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ +#define NOBSX 30 +#define NOBSY 18 /* obstacles for O_HEX obstacle pattern */ #define X_SHOOTER -0.2 #define Y_SHOOTER -0.6 @@ -10022,21 +8109,21 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* Parameters for length and speed of simulation */ -#define NSTEPS 3300 /* number of frames of movie */ -#define NVID 30 /* number of iterations between images displayed on screen */ +#define NSTEPS 3800 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ #define NSEG 25 /* number of segments of boundary of circles */ #define INITIAL_TIME 0 /* time after which to start saving frames */ #define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ #define BOUNDARY_WIDTH 1 /* width of particle boundary */ #define LINK_WIDTH 2 /* width of links between particles */ -#define CONTAINER_WIDTH 4 /* width of container boundary */ +#define CONTAINER_WIDTH 2 /* width of container boundary */ #define PAUSE 1000 /* number of frames after which to pause */ #define PSLEEP 1 /* sleep time during pause */ #define SLEEP1 1 /* initial sleeping time */ #define SLEEP2 1 /* final sleeping time */ #define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ -#define END_FRAMES 100 /* number of still frames at end of movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ /* Boundary conditions, see list in global_ljones.c */ @@ -10044,16 +8131,22 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO /* Plot type, see list in global_ljones.c */ -#define PLOT 11 -#define PLOT_B 14 /* plot type for second movie */ +#define PLOT 5 +#define PLOT_B 5 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 0 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 2 /* type of background coloring, see list in global_ljones.c */ #define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ #define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ #define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ #define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ -#define COLOR_SEG_GROUPS 1 /* set to 1 to collor segment groups differently */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ #define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ -#define INITIAL_POS_TYPE 1 /* type of initial position dependence */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ #define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ #define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ @@ -10062,8 +8155,9 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ #define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ #define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ -#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ #define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ #define BLACK 1 /* background */ @@ -10079,12 +8173,12 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ #define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ #define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ -#define COLOR_HUESHIFT 0.5 /* shift in color hue (for some cyclic palettes) */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ #define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ #define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ -#define PRINT_ANGLE 1 /* set to 1 to print obstacle orientation */ -#define PRINT_OMEGA 1 /* set to 1 to print angular speed */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ #define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ #define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ #define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ @@ -10096,7 +8190,7 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ #define PARTICLE_HUE_MIN 359.0 /* color of original particle */ #define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ -#define PARTICLE_EMAX 5000.0 /* energy of particle with hottest color */ +#define PARTICLE_EMAX 30000.0 /* energy of particle with hottest color */ #define HUE_TYPE0 280.0 /* hue of particles of type 0 */ #define HUE_TYPE1 60.0 /* hue of particles of type 1 */ #define HUE_TYPE2 140.0 /* hue of particles of type 2 */ @@ -10104,33 +8198,35 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ #define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ -#define KREPEL 1.0 /* constant in repelling force between particles */ +#define KREPEL 50.0 /* constant in repelling force between particles */ #define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ #define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ -#define REPEL_RADIUS 15.0 /* radius in which repelling force acts (in units of particle radius) */ -#define DAMPING 100.0 /* damping coefficient of particles */ -#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ -#define INITIAL_DAMPING 5.0 /* damping coefficient of particles during initial phase */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ #define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ #define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ -#define PARTICLE_MASS_B 1.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ #define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ #define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ -#define V_INITIAL 0.0 /* initial velocity range */ +#define V_INITIAL -50.0 /* initial velocity range */ #define OMEGA_INITIAL 10.0 /* initial angular velocity range */ #define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ #define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ -#define THERMOSTAT 0 /* set to 1 to switch on thermostat */ +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ #define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ #define SIGMA 5.0 /* noise intensity in thermostat */ -#define BETA 0.02 /* initial inverse temperature */ +#define BETA 0.00002 /* initial inverse temperature */ #define MU_XI 0.01 /* friction constant in thermostat */ -#define KSPRING_BOUNDARY 1.0e7 /* confining harmonic potential outside simulation region */ +#define KSPRING_BOUNDARY 2.0e10 /* confining harmonic potential outside simulation region */ #define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ -#define NBH_DIST_FACTOR 3.8 /* radius in which to count neighbours */ -#define GRAVITY 0.0 /* gravity acting on all particles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ #define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ #define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ #define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ #define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ @@ -10139,6 +8235,20 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ #define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ +#define ADD_EFIELD 1 /* set to 1 to add an electric field */ +#define EFIELD 100000.0 /* value of electric field */ +#define ADD_BFIELD 1 /* set to 1 to add a magnetic field */ +#define BFIELD 5.33333333333333 /* value of magnetic field */ +#define CHARGE -1.0 /* charge of particles of first type */ +#define CHARGE_B 2.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 100000.0 /* factor by which to increase electric field */ +#define INCREASE_B 1 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 1000.0 /* factor by which to increase magnetic field */ +#define CHARGE_OBSTACLES 1 /* set to 1 for obstacles to be charged */ +#define OBSTACLE_CHARGE 3.0 /* charge of obstacles */ +#define KCOULOMB_OBSTACLE 100.0 /* Coulomb force constant for charged obstacles */ + #define ROTATION 0 /* set to 1 to include rotation of particles */ #define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ #define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ @@ -10154,24 +8264,24 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ #define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ -#define BETA_FACTOR 0.02 /* factor by which to change BETA during simulation */ +#define BETA_FACTOR 200.0 /* factor by which to change BETA during simulation */ #define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ #define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ -#define MIDDLE_CONSTANT_PHASE 2000 /* final phase in which temperature is constant */ -#define FINAL_DECREASE_PHASE 1300 /* final phase in which temperature decreases */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ #define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ #define DECREASE_CONTAINER_SIZE 0 /* set to 1 to decrease size of container */ #define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ #define COMPRESSION_RATIO 0.3 /* final size of container */ #define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ -#define RESTORE_TIME 700 /* time before end of sim at which to restore size */ +#define RESTORE_TIME 1000 /* time before end of sim at which to restore size */ #define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ #define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ #define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ #define NTRIALS 2000 /* number of trials when resampling */ -#define OBSTACLE_RADIUS 0.25 /* radius of obstacle for circle boundary conditions */ +#define OBSTACLE_RADIUS 0.015 /* radius of obstacle for circle boundary conditions */ #define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ #define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ #define OBSTACLE_XMAX 3.0 /* final position of obstacle */ @@ -10193,9 +8303,9 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ #define NPART_BOTTOM 100 /* number of particles at the bottom */ -#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_PARTICLES 1 /* set to 1 to add particles */ #define ADD_TIME 0 /* time at which to add first particle */ -#define ADD_PERIOD 10 /* time interval between adding further particles */ +#define ADD_PERIOD 6 /* time interval between adding further particles */ #define N_ADD_PARTICLES 2 /* number of particles to add */ #define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ #define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ @@ -10206,14 +8316,14 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ #define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ -#define ROTATE_BOUNDARY 1 /* set to 1 to rotate the repelling segments */ +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ #define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ -#define ROTATION_SCHEDULE 1 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ #define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ #define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ #define ROTATE_FINAL_TIME 300 /* final time without rotation */ #define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ -#define OMEGAMAX 2.0*PI*PI /* maximal rotation speed */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ #define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ #define SEGMENTS_MASS 40.0 /* mass of collection of segments */ @@ -10225,6 +8335,9 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define SEGMENTS_VX0 0.0 /* initial velocity of segments */ #define SEGMENTS_VY0 0.0 /* initial velocity of segments */ #define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ #define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ #define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ @@ -10289,8 +8402,8 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO #define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ #define PMAX 1000.0 /* maximal force */ -#define HASHX 120 /* size of hashgrid in x direction */ -#define HASHY 60 /* size of hashgrid in y direction */ +#define HASHX 30 /* size of hashgrid in x direction */ +#define HASHY 20 /* size of hashgrid in y direction */ #define HASHMAX 100 /* maximal number of particles per hashgrid cell */ #define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ @@ -10303,3 +8416,845 @@ int reset_view = 0; /* switch to reset 3D view parameters (for option RO ``` +### 03 December 23 - The effect of an obstruction on a two-lenses set-up ### + +**Program:** `wave_comparison.c` + +**Initial condition in function `animation()`:** + +``` + init_wave_flat_comp(phi, psi, xy_in); + + if ((ADD_OSCILLATING_SOURCE)&&(i%OSCILLATING_SOURCE_PERIOD == 1)) + { + if (ALTERNATE_OSCILLATING_SOURCE) sign = -sign; + add_circular_wave(sign, -1.75, 0.16, phi, psi, xy_in); + add_circular_wave(sign, -1.75, -0.16, phi, psi, xy_in); + } +``` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 1 /* set to 1 for a variable index of refraction */ +#define IOR 11 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ +#define TIME_LAPSE_FACTOR 4 /* factor of time-lapse movie */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ +#define YMID 1150 /* mid point of display */ +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 64 /* choice of domain shape, see list in global_pdes.c */ +#define B_DOMAIN_B 64 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 13 /* pattern of circles, see list in global_pdes.c */ +#define CIRCLE_PATTERN_B 13 /* pattern of circles, see list in global_pdes.c */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 300 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ +#define RANDOM_POLY_ANGLE_B 0 /* set to 1 to randomize angle of polygons */ + +#define XDEP_POLY_ANGLE 0 /* set to 1 to rotate polygons depending on x coordinate */ +#define XDEP_POLY_ANGLE_B 0 /* set to 1 to rotate polygons depending on x coordinate */ +#define POLY_ROTATION_ANGLE -0.645 /* rotation angle for |x|=1 in units of Pi/2 */ +#define HEX_NONUNIF_COMPRESSSION 0.15 /* compression factor for HEX_NONUNIF pattern */ +#define HEX_NONUNIF_COMPRESSSION_B -0.15 /* compression factor for HEX_NONUNIF pattern */ + +#define LAMBDA 1.5 /* parameter controlling the dimensions of domain */ +#define MU 0.0 /* parameter controlling the dimensions of domain */ +#define MUB 0.4 /* parameter controlling the dimensions of domain */ +#define NPOLY 3 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define APOLY_B 2.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 20 /* number of grid point for grid of disks */ +#define NGRIDY 20 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -1.65 +#define ISO_XSHIFT_RIGHT 0.4 +#define ISO_YSHIFT_LEFT -0.05 +#define ISO_YSHIFT_RIGHT -0.05 +#define ISO_SCALE 0.85 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ + +#define OMEGA 0.024 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.1 /* Courant number */ +#define COURANTB 0.063 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 1 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 20 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ +#define NSOURCES 48 /* number of sources */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 4 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2400 /* number of frames of movie */ +#define NVID 7 /* number of iterations between images displayed on screen */ +#define NSEG 100 /* number of segments of boundary */ +#define INITIAL_TIME 100 /* time after which to start saving frames */ +#define COMPUTE_ENERGIES 0 /* set to 1 to compute and print energies */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ + +#define PAUSE 100 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 50 /* number of still frames between movies */ +#define END_FRAMES 300 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 1.0 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.00001 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.025 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 13 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ +#define BLACK_TEXT 1 /* set to 1 to write text in black instead of white */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 100.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 2.0 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -220.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.5 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.5 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 5.0 /* max value of wave amplitude */ + +/* the following constants are only used by wave_billiard and wave_3d so far */ +#define COMPARISON 0 /* set to 1 to compare two different patterns */ +#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ +#define ACHIRP 0.2 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +/* end of constants only used by wave_billiard and wave_3d */ + +/* for compatibility with sub_wave and sub_maze */ +#define NXMAZE 7 /* width of maze */ +#define NYMAZE 7 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 24 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +#define MAZE_WIDTH 0.02 /* half width of maze walls */ +#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ +#define N_WAVE_PACKETS 15 /* number of wave packets */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ +/* end of constants only used by sub_wave and sub_maze */ + +``` + +### 02 December 23 - Compressing charged molecules: charge density and force field ### + +**Program:** `lennardjones.c` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory while saving frames */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ + /* so far incompatible with double movie */ +#define TIME_LAPSE_FACTOR 3 /* factor of time-lapse movie */ +#define TIME_LAPSE_FIRST 1 /* set to 1 to show time-lapse version first */ + +#define SAVE_TIME_SERIES 0 /* set to 1 to save time series of particle positions */ + +/* General geometrical parameters */ + +#define WINWIDTH 1600 /* window width */ +#define WINHEIGHT 900 /* window height */ + +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.125 +#define YMAX 1.125 /* y interval for 9/16 aspect ratio */ + +#define INITXMIN -2.0 +#define INITXMAX 2.01 /* x interval for initial condition */ +#define INITYMIN -1.1 +#define INITYMAX 1.17 /* y interval for initial condition */ + +#define ADDXMIN -1.97 +#define ADDXMAX -0.8 /* x interval for adding particles */ +#define ADDYMIN -1.125 +#define ADDYMAX 1.125 /* y interval for adding particles */ + + +#define BCXMIN -2.0 +#define BCXMAX 2.0 /* x interval for boundary condition */ +#define BCYMIN -1.125 +#define BCYMAX 1.125 /* y interval for boundary condition */ + +#define OBSXMIN -2.0 +#define OBSXMAX 2.0 /* x interval for motion of obstacle */ + +#define CIRCLE_PATTERN 1 /* pattern of circles, see list in global_ljones.c */ + +#define ADD_INITIAL_PARTICLES 0 /* set to 1 to add a second type of particles */ +#define CIRCLE_PATTERN_B 1 /* pattern of circles for additional particles */ + +#define ADD_FIXED_OBSTACLES 0 /* set to 1 do add fixed circular obstacles */ +#define OBSTACLE_PATTERN 4 /* pattern of obstacles, see list in global_ljones.c */ + +#define ADD_FIXED_SEGMENTS 0 /* set to 1 to add fixed segments as obstacles */ +#define SEGMENT_PATTERN 27 /* pattern of repelling segments, see list in global_ljones.c */ +#define ROCKET_SHAPE 3 /* shape of rocket combustion chamber, see list in global_ljones.c */ +#define ROCKET_SHAPE_B 3 /* shape of second rocket */ +#define NOZZLE_SHAPE 6 /* shape of nozzle, see list in global_ljones.c */ +#define NOZZLE_SHAPE_B 6 /* shape of nozzle for second rocket, see list in global_ljones.c */ + +#define TWO_TYPES 1 /* set to 1 to have two types of particles */ +#define TYPE_PROPORTION 0.55 /* proportion of particles of first type */ +#define TWOTYPE_CONFIG 0 /* choice of types, see TTC_ list in global_ljones.c */ +#define SYMMETRIZE_FORCE 1 /* set to 1 to symmetrize two-particle interaction, only needed if particles are not all the same */ +#define CENTER_PX 0 /* set to 1 to center horizontal momentum */ +#define CENTER_PY 0 /* set to 1 to center vertical momentum */ +#define CENTER_PANGLE 0 /* set to 1 to center angular momentum */ + +#define INTERACTION 12 /* particle interaction, see list in global_ljones.c */ +#define INTERACTION_B 12 /* particle interaction for second type of particle, see list in global_ljones.c */ +#define SPIN_INTER_FREQUENCY 4.0 /* angular frequency of spin-spin interaction */ +#define SPIN_INTER_FREQUENCY_B 4.0 /* angular frequency of spin-spin interaction for second particle type */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 100 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define PDISC_DISTANCE 2.8 /* minimal distance in Poisson disc process, controls density of particles */ +#define PDISC_CANDIDATES 100 /* number of candidates in construction of Poisson disc process */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ + +#define LAMBDA 0.2 /* parameter controlling the dimensions of domain */ +#define MU 0.008 /* parameter controlling radius of particles */ +#define MU_B 0.018 /* parameter controlling radius of particles of second type */ +#define NPOLY 40 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define AWEDGE 0.5 /* opening angle of wedge, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 85 /* number of grid point for grid of disks */ +#define NGRIDY 43 /* number of grid point for grid of disks */ +#define EHRENFEST_RADIUS 0.9 /* radius of container for Ehrenfest urn configuration */ +#define EHRENFEST_WIDTH 0.035 /* width of tube for Ehrenfest urn configuration */ +#define TWO_CIRCLES_RADIUS_RATIO 0.8 /* ratio of radii for S_TWO_CIRCLES_EXT segment configuration */ +#define DAM_WIDTH 0.05 /* width of dam for S_DAM segment configuration */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 4000 /* number of frames of movie */ +#define NVID 25 /* number of iterations between images displayed on screen */ +#define NSEG 25 /* number of segments of boundary of circles */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define OBSTACLE_INITIAL_TIME 150 /* time after which to start moving obstacle */ +#define BOUNDARY_WIDTH 1 /* width of particle boundary */ +#define LINK_WIDTH 2 /* width of links between particles */ +#define CONTAINER_WIDTH 4 /* width of container boundary */ + +#define PAUSE 1000 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between parts of two-part movie */ +#define END_FRAMES 250 /* number of still frames at end of movie */ + +/* Boundary conditions, see list in global_ljones.c */ + +#define BOUNDARY_COND 1 + +/* Plot type, see list in global_ljones.c */ + +#define PLOT 5 +#define PLOT_B 5 /* plot type for second movie */ + +/* Background color depending on particle properties */ + +#define COLOR_BACKGROUND 1 /* set to 1 to color background */ +#define BG_COLOR 2 /* type of background coloring, see list in global_ljones.c */ +#define BG_COLOR_B 4 /* type of background coloring, see list in global_ljones.c */ + +#define DRAW_BONDS 1 /* set to 1 to draw bonds between neighbours */ +#define COLOR_BONDS 1 /* set to 1 to color bonds according to length */ +#define FILL_TRIANGLES 0 /* set to 1 to fill triangles between neighbours */ +#define ALTITUDE_LINES 0 /* set to 1 to add horizontal lines to show altitude */ +#define COLOR_SEG_GROUPS 0 /* set to 1 to collor segment groups differently */ +#define N_PARTICLE_COLORS 200 /* number of colors for P_NUMBER color scheme */ +#define INITIAL_POS_TYPE 0 /* type of initial position dependence */ +#define ERATIO 0.995 /* ratio for time-averaging in P_EMEAN color scheme */ +#define DRATIO 0.995 /* ratio for time-averaging in P_DIRECT_EMEAN color scheme */ + +/* Color schemes */ + +#define COLOR_PALETTE 10 /* Color palette, see list in global_ljones.c */ +#define COLOR_PALETTE_EKIN 10 /* Color palette for kinetic energy */ +#define COLOR_PALETTE_ANGLE 10 /* Color palette for angle representation */ +#define COLOR_PALETTE_DIRECTION 17 /* Color palette for direction representation */ +#define COLOR_PALETTE_INITIAL_POS 0 /* Color palette for initial position representation */ +#define COLOR_PALETTE_DIFFNEIGH 10 /* Color palette for different neighbours representation */ + +#define BLACK 1 /* background */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_ljones.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 0.5 /* sensitivity of color on wave amplitude */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -50.0 /* amplitude of variation of hue for color scheme C_HUE */ +#define COLOR_HUESHIFT -0.5 /* shift in color hue (for some cyclic palettes) */ + +#define PRINT_PARAMETERS 1 /* set to 1 to print certain parameters */ +#define PRINT_TEMPERATURE 0 /* set to 1 to print current temperature */ +#define PRINT_ANGLE 0 /* set to 1 to print obstacle orientation */ +#define PRINT_OMEGA 0 /* set to 1 to print angular speed */ +#define PRINT_PARTICLE_SPEEDS 0 /* set to 1 to print average speeds/momenta of particles */ +#define PRINT_SEGMENTS_SPEEDS 0 /* set to 1 to print velocity of moving segments */ +#define PRINT_SEGMENTS_FORCE 0 /* set to 1 to print force on segments */ +#define FORCE_FACTOR 0.1 /* factor controlling length of force vector */ + +/* particle properties */ + +#define ENERGY_HUE_MIN 330.0 /* color of original particle */ +#define ENERGY_HUE_MAX 50.0 /* color of saturated particle */ +#define PARTICLE_HUE_MIN 359.0 /* color of original particle */ +#define PARTICLE_HUE_MAX 0.0 /* color of saturated particle */ +#define PARTICLE_EMAX 3000.0 /* energy of particle with hottest color */ +#define HUE_TYPE0 280.0 /* hue of particles of type 0 */ +#define HUE_TYPE1 60.0 /* hue of particles of type 1 */ +#define HUE_TYPE2 140.0 /* hue of particles of type 2 */ +#define HUE_TYPE3 200.0 /* hue of particles of type 3 */ + +#define RANDOM_RADIUS 0 /* set to 1 for random circle radius */ +#define DT_PARTICLE 3.0e-6 /* time step for particle displacement */ +#define KREPEL 50.0 /* constant in repelling force between particles */ +#define EQUILIBRIUM_DIST 5.0 /* Lennard-Jones equilibrium distance */ +#define EQUILIBRIUM_DIST_B 5.0 /* Lennard-Jones equilibrium distance for second type of particle */ +#define REPEL_RADIUS 20.0 /* radius in which repelling force acts (in units of particle radius) */ +#define DAMPING 3000.0 /* damping coefficient of particles */ +#define INITIAL_DAMPING 5000.0 /* damping coefficient of particles during initial phase */ +#define DAMPING_ROT 100.0 /* dampint coefficient for rotation of particles */ +#define PARTICLE_MASS 1.0 /* mass of particle of radius MU */ +#define PARTICLE_MASS_B 25.0 /* mass of particle of radius MU */ +#define PARTICLE_INERTIA_MOMENT 0.2 /* moment of inertia of particle */ +#define PARTICLE_INERTIA_MOMENT_B 0.02 /* moment of inertia of second type of particle */ +#define V_INITIAL 0.0 /* initial velocity range */ +#define OMEGA_INITIAL 10.0 /* initial angular velocity range */ +#define VICSEK_VMIN 1.0 /* minimal speed of particles in Vicsek model */ +#define VICSEK_VMAX 40.0 /* minimal speed of particles in Vicsek model */ + +#define V_INITIAL_TYPE 0 /* type of initial speed distribution (see VI_ in global_ljones.c) */ + +#define THERMOSTAT 1 /* set to 1 to switch on thermostat */ +#define VARY_THERMOSTAT 0 /* set to 1 for time-dependent thermostat schedule */ +#define SIGMA 5.0 /* noise intensity in thermostat */ +#define BETA 0.00004 /* initial inverse temperature */ +#define MU_XI 0.01 /* friction constant in thermostat */ +#define KSPRING_BOUNDARY 2.0e10 /* confining harmonic potential outside simulation region */ +#define KSPRING_OBSTACLE 1.0e11 /* harmonic potential of obstacles */ +#define NBH_DIST_FACTOR 3.2 /* radius in which to count neighbours */ +#define GRAVITY 0.0 /* gravity acting on all particles */ +#define GRAVITY_X 0.0 /* horizontal gravity acting on all particles */ +#define CIRCULAR_GRAVITY 0 /* set to 1 to have gravity directed to center */ +#define INCREASE_GRAVITY 0 /* set to 1 to increase gravity during the simulation */ +#define GRAVITY_SCHEDULE 2 /* type of gravity schedule, see list in global_ljones.c */ +#define GRAVITY_FACTOR 100.0 /* factor by which to increase gravity */ +#define GRAVITY_INITIAL_TIME 200 /* time at start of simulation with constant gravity */ +#define GRAVITY_RESTORE_TIME 700 /* time at end of simulation with gravity restored to initial value */ +#define KSPRING_VICSEK 0.2 /* spring constant for I_VICSEK_SPEED interaction */ +#define VICSEK_REPULSION 10.0 /* repulsion between particles in Vicsek model */ + +#define ADD_EFIELD 0 /* set to 1 to add an electric field */ +#define EFIELD 50000.0 /* value of electric field */ +#define ADD_BFIELD 0 /* set to 1 to add a magnetic field */ +#define BFIELD 5.33333333333333 /* value of magnetic field */ +#define CHARGE -1.0 /* charge of particles of first type */ +#define CHARGE_B 3.0 /* charge of particles of second type */ +#define INCREASE_E 0 /* set to 1 to increase electric field */ +#define EFIELD_FACTOR 100000.0 /* factor by which to increase electric field */ +#define INCREASE_B 0 /* set to 1 to increase magnetic field */ +#define BFIELD_FACTOR 1000.0 /* factor by which to increase magnetic field */ + +#define ROTATION 0 /* set to 1 to include rotation of particles */ +#define COUPLE_ANGLE_TO_THERMOSTAT 1 /* set to 1 to couple angular degrees of freedom to thermostat */ +#define DIMENSION_FACTOR 1.0 /* scaling factor taking into account number of degrees of freedom */ +#define KTORQUE 50.0 /* force constant in angular dynamics */ +#define KTORQUE_BOUNDARY 1.0e6 /* constant in torque from the boundary */ +#define KTORQUE_B 10.0 /* force constant in angular dynamics */ +#define KTORQUE_DIFF 150.0 /* force constant in angular dynamics for different particles */ +#define DRAW_SPIN 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_SPIN_B 0 /* set to 1 to draw spin vectors of particles */ +#define DRAW_CROSS 1 /* set to 1 to draw cross on particles of second type */ +#define SPIN_RANGE 10.0 /* range of spin-spin interaction */ +#define SPIN_RANGE_B 5.0 /* range of spin-spin interaction for second type of particle */ +#define QUADRUPOLE_RATIO 0.6 /* anisotropy in quadrupole potential */ + +#define INCREASE_BETA 0 /* set to 1 to increase BETA during simulation */ +#define BETA_FACTOR 200.0 /* factor by which to change BETA during simulation */ +#define N_TOSCILLATIONS 1.5 /* number of temperature oscillations in BETA schedule */ +#define NO_OSCILLATION 1 /* set to 1 to have exponential BETA change only */ +#define MIDDLE_CONSTANT_PHASE 0 /* final phase in which temperature is constant */ +#define FINAL_DECREASE_PHASE 0 /* final phase in which temperature decreases */ +#define FINAL_CONSTANT_PHASE -1 /* final phase in which temperature is constant */ + +#define DECREASE_CONTAINER_SIZE 1 /* set to 1 to decrease size of container */ +#define SYMMETRIC_DECREASE 0 /* set tp 1 to decrease container symmetrically */ +#define COMPRESSION_RATIO 0.3 /* final size of container */ +#define RESTORE_CONTAINER_SIZE 1 /* set to 1 to restore container to initial size at end of simulation */ +#define RESTORE_TIME 1000 /* time before end of sim at which to restore size */ + +#define MOVE_OBSTACLE 0 /* set to 1 to have a moving obstacle */ +#define CENTER_VIEW_ON_OBSTACLE 0 /* set to 1 to center display on moving obstacle */ +#define RESAMPLE_Y 0 /* set to 1 to resample y coordinate of moved particles (for shock waves) */ +#define NTRIALS 2000 /* number of trials when resampling */ +#define OBSTACLE_RADIUS 0.15 /* radius of obstacle for circle boundary conditions */ +#define FUNNEL_WIDTH 0.25 /* funnel width for funnel boundary conditions */ +#define OBSTACLE_XMIN 0.0 /* initial position of obstacle */ +#define OBSTACLE_XMAX 3.0 /* final position of obstacle */ +#define RECORD_PRESSURES 0 /* set to 1 to record pressures on obstacle */ +#define N_PRESSURES 100 /* number of intervals to record pressure */ +#define N_P_AVERAGE 100 /* size of pressure averaging window */ +#define N_T_AVERAGE 1 /* size of temperature averaging window */ +#define MAX_PRESSURE 3.0e10 /* pressure shown in "hottest" color */ +#define PARTIAL_THERMO_COUPLING 0 /* set to 1 to couple only some particles to thermostat */ +#define PARTIAL_THERMO_REGION 1 /* region for partial thermostat coupling (see list in global_ljones.c) */ +#define PARTIAL_THERMO_SHIFT 0.2 /* distance from obstacle at the right of which particles are coupled to thermostat */ +#define PARTIAL_THERMO_WIDTH 0.5 /* vertical size of partial thermostat coupling */ +#define PARTIAL_THERMO_HEIGHT 0.25 /* vertical size of partial thermostat coupling */ + +#define INCREASE_KREPEL 0 /* set to 1 to increase KREPEL during simulation */ +#define KREPEL_FACTOR 1000.0 /* factor by which to change KREPEL during simulation */ + +#define PART_AT_BOTTOM 0 /* set to 1 to include "seed" particles at bottom */ +#define MASS_PART_BOTTOM 10000.0 /* mass of particles at bottom */ +#define NPART_BOTTOM 100 /* number of particles at the bottom */ + +#define ADD_PARTICLES 0 /* set to 1 to add particles */ +#define ADD_TIME 0 /* time at which to add first particle */ +#define ADD_PERIOD 10 /* time interval between adding further particles */ +#define N_ADD_PARTICLES 2 /* number of particles to add */ +#define FINAL_NOADD_PERIOD 0 /* final period where no particles are added */ +#define SAFETY_FACTOR 2.0 /* no particles are added at distance less than MU*SAFETY_FACTOR of other particles */ + +#define TRACER_PARTICLE 0 /* set to 1 to have a tracer particle */ +#define N_TRACER_PARTICLES 3 /* number of tracer particles */ +#define TRAJECTORY_LENGTH 8000 /* length of recorded trajectory */ +#define TRACER_PARTICLE_MASS 4.0 /* relative mass of tracer particle */ +#define TRAJECTORY_WIDTH 3 /* width of tracer particle trajectory */ + +#define ROTATE_BOUNDARY 0 /* set to 1 to rotate the repelling segments */ +#define SMOOTH_ROTATION 1 /* set to 1 to update segments at each time step (rather than at each movie frame) */ +#define ROTATION_SCHEDULE 0 /* time-dependence of rotation angle, see ROT_* in global_ljones.c */ +#define PERIOD_ROTATE_BOUNDARY 1000 /* period of rotating boundary */ +#define ROTATE_INITIAL_TIME 300 /* initial time without rotation */ +#define ROTATE_FINAL_TIME 300 /* final time without rotation */ +#define ROTATE_CHANGE_TIME 0.5 /* relative duration of acceleration/deceleration phases */ +#define OMEGAMAX -2.0*PI /* maximal rotation speed */ + +#define MOVE_BOUNDARY 0 /* set to 1 to move repelling segments, due to force from particles */ +#define SEGMENTS_MASS 40.0 /* mass of collection of segments */ +#define DEACTIVATE_SEGMENT 1 /* set to 1 to deactivate last segment after a certain time */ +#define SEGMENT_DEACTIVATION_TIME 20 /* time at which to deactivate last segment */ +#define RELEASE_ROCKET_AT_DEACTIVATION 0 /* set to 1 to limit segments velocity before segment release */ +#define SEGMENTS_X0 1.5 /* initial position of segments */ +#define SEGMENTS_Y0 0.0 /* initial position of segments */ +#define SEGMENTS_VX0 0.0 /* initial velocity of segments */ +#define SEGMENTS_VY0 0.0 /* initial velocity of segments */ +#define DAMP_SEGS_AT_NEGATIVE_Y 0 /* set to 1 to dampen segments when y coordinate is negative */ +#define SHOW_SEGMENTS_PRESSURE 1 /* set to 1 to show (averaged) pressure acting on segments */ +#define SEGMENT_PMAX 7.5e7 /* pressure of segment with hottest color */ +#define P_AVRG_FACTOR 0.02 /* factor in computation of mean pressure */ + +#define MOVE_SEGMENT_GROUPS 0 /* set to 1 to group segments into moving units */ +#define SEGMENT_GROUP_MASS 500.0 /* mass of segment group */ +#define SEGMENT_GROUP_I 1000.0 /* moment of inertia of segment group */ +#define SEGMENT_GROUP_DAMPING 0.0 /* damping of segment groups */ +#define GROUP_REPULSION 0 /* set to 1 for groups of segments to repel each other */ +#define KSPRING_GROUPS 5.0e11 /* harmonic potential between segment groups */ +#define GROUP_WIDTH 0.05 /* interaction width of groups */ +#define GROUP_G_REPEL 0 /* set to 1 to add repulsion between centers of mass of groups */ +#define GROUP_G_REPEL_RADIUS 1.2 /* radius within which centers of mass of groups repel each other */ +#define TRACK_SEGMENT_GROUPS 0 /* set to 1 for view to track group of segments */ +#define TRACK_X_PADDING 2.0 /* distance from x boundary where tracking starts */ + +#define POSITION_DEPENDENT_TYPE 0 /* set to 1 to make particle type depend on initial position */ +#define POSITION_Y_DEPENDENCE 0 /* set to 1 for the separation between particles to be horizontal */ +#define POSITION_DEP_SIGN -1.0 /* sign in position dependence condition */ +#define POSITION_DEP_X -0.625 /* threshold value for position-dependent type */ +#define PRINT_ENTROPY 0 /* set to 1 to compute entropy */ + +#define REACTION_DIFFUSION 0 /* set to 1 to simulate a chemical reaction (particles may change type) */ +#define RD_REACTION 16 /* type of reaction, see list in global_ljones.c */ +#define RD_TYPES 5 /* number of types in reaction-diffusion equation */ +#define RD_INITIAL_COND 9 /* initial condition of particles */ +#define REACTION_DIST 4.0 /* maximal distance for reaction to occur */ +#define REACTION_PROB 1.0 /* probability controlling reaction term */ +#define DISSOCIATION_PROB 0.002 /* probability controlling dissociation reaction */ +#define CENTER_COLLIDED_PARTICLES 0 /* set to 1 to recenter particles upon reaction (may interfere with thermostat) */ +#define EXOTHERMIC 1 /* set to 1 to make reaction exo/endothermic */ +#define DELTA_EKIN 2000.0 /* change of kinetic energy in reaction */ +#define COLLISION_TIME 15 /* time during which collisions are shown */ + +#define CHANGE_RADIUS 0 /* set to 1 to change particle radius during simulation */ +#define MU_RATIO 0.666666667 /* ratio by which to increase radius */ + +#define PRINT_PARTICLE_NUMBER 0 /* set to 1 to print total number of particles */ +#define PLOT_PARTICLE_NUMBER 0 /* set to 1 to make of plot of particle number over time */ +#define PARTICLE_NB_PLOT_FACTOR 0.5 /* expected final number of particles over initial number */ +#define PRINT_LEFT 0 /* set to 1 to print certain parameters at the top left instead of right */ +#define PLOT_SPEEDS 0 /* set to 1 to add a plot of obstacle speeds (e.g. for rockets) */ +#define PLOT_TRAJECTORIES 0 /* set to 1 to add a plot of obstacle trajectories (e.g. for rockets) */ +#define VMAX_PLOT_SPEEDS 0.25 /* vertical scale of plot of obstacle speeds */ + +#define EHRENFEST_COPY 0 /* set to 1 to add equal number of larger particles (for Ehrenfest model) */ + +#define LID_MASS 1000.0 /* mass of lid for BC_RECTANGLE_LID b.c. */ +#define LID_WIDTH 0.1 /* width of lid for BC_RECTANGLE_LID b.c. */ +#define WALL_MASS 2000.0 /* mass of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_FRICTION 0.0 /* friction on wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_WIDTH 0.1 /* width of wall for BC_RECTANGLE_WALL b.c. */ +#define WALL_VMAX 100.0 /* max speed of wall */ +#define WALL_TIME 0 /* time during which to keep wall */ + +#define NXMAZE 12 /* width of maze */ +#define NYMAZE 12 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 4 /* seed of random number generator */ +#define MAZE_XSHIFT 0.5 /* horizontal shift of maze */ +#define MAZE_WIDTH 0.01 /* width of maze walls */ + +#define FLOOR_FORCE 1 /* set to 1 to limit force on particle to FMAX */ +#define FMAX 1.0e9 /* maximal force */ +#define FLOOR_OMEGA 0 /* set to 1 to limit particle momentum to PMAX */ +#define PMAX 1000.0 /* maximal force */ + +#define HASHX 60 /* size of hashgrid in x direction */ +#define HASHY 30 /* size of hashgrid in y direction */ +#define HASHMAX 100 /* maximal number of particles per hashgrid cell */ +#define HASHGRID_PADDING 0.1 /* padding of hashgrid outside simulation window */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 8.0 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.0 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + +#define LIMIT_ENERGY 0 /* set to 1 to limit energy, when there is no thermostat */ + +``` + +### 01 December 23 - Comparison of two-lenses set-ups with different numerical apertures ### + +**Program:** `wave_comparison.c` + +**Initial condition in function `animation()`:** +``` + init_wave_flat_comp(phi, psi, xy_in); + + if ((ADD_OSCILLATING_SOURCE)&&(i%OSCILLATING_SOURCE_PERIOD == 1)) + { + if (ALTERNATE_OSCILLATING_SOURCE) sign = -sign; + add_circular_wave(sign, -1.75, 0.16, phi, psi, xy_in); + add_circular_wave(sign, -1.75, -0.16, phi, psi, xy_in); + } +``` + +``` +#define MOVIE 1 /* set to 1 to generate movie */ +#define DOUBLE_MOVIE 1 /* set to 1 to produce movies for wave height and energy simultaneously */ +#define SAVE_MEMORY 1 /* set to 1 to save memory when writing tiff images */ +#define NO_EXTRA_BUFFER_SWAP 1 /* some OS require one less buffer swap when recording images */ + +#define VARIABLE_IOR 1 /* set to 1 for a variable index of refraction */ +#define IOR 10 /* choice of index of refraction, see list in global_pdes.c */ +#define IOR_TOTAL_TURNS 1.5 /* total angle of rotation for IOR_PERIODIC_WELLS_ROTATING */ +#define MANDEL_IOR_SCALE -0.05 /* parameter controlling dependence of IoR on Mandelbrot escape speed */ + +#define TIME_LAPSE 0 /* set to 1 to add a time-lapse movie at the end */ +#define TIME_LAPSE_FACTOR 4 /* factor of time-lapse movie */ + +#define WINWIDTH 1920 /* window width */ +#define WINHEIGHT 1150 /* window height */ +#define NX 3840 /* number of grid points on x axis */ +#define NY 2300 /* number of grid points on y axis */ +#define YMID 1150 /* mid point of display */ +#define XMIN -2.0 +#define XMAX 2.0 /* x interval */ +#define YMIN -1.197916667 +#define YMAX 1.197916667 /* y interval for 9/16 aspect ratio */ + +#define HIGHRES 1 /* set to 1 if resolution of grid is double that of displayed image */ + +#define JULIA_SCALE 1.0 /* scaling for Julia sets */ + +/* Choice of the billiard table */ + +#define B_DOMAIN 63 /* choice of domain shape, see list in global_pdes.c */ +#define B_DOMAIN_B 63 /* choice of domain shape, see list in global_pdes.c */ + +#define CIRCLE_PATTERN 13 /* pattern of circles, see list in global_pdes.c */ +#define CIRCLE_PATTERN_B 13 /* pattern of circles, see list in global_pdes.c */ + +#define P_PERCOL 0.25 /* probability of having a circle in C_RAND_PERCOL arrangement */ +#define NPOISSON 300 /* number of points for Poisson C_RAND_POISSON arrangement */ +#define RANDOM_POLY_ANGLE 0 /* set to 1 to randomize angle of polygons */ +#define RANDOM_POLY_ANGLE_B 0 /* set to 1 to randomize angle of polygons */ + +#define XDEP_POLY_ANGLE 0 /* set to 1 to rotate polygons depending on x coordinate */ +#define XDEP_POLY_ANGLE_B 0 /* set to 1 to rotate polygons depending on x coordinate */ +#define POLY_ROTATION_ANGLE -0.645 /* rotation angle for |x|=1 in units of Pi/2 */ +#define HEX_NONUNIF_COMPRESSSION 0.15 /* compression factor for HEX_NONUNIF pattern */ +#define HEX_NONUNIF_COMPRESSSION_B -0.15 /* compression factor for HEX_NONUNIF pattern */ + +#define LAMBDA 1.5 /* parameter controlling the dimensions of domain */ +#define MU 0.7 /* parameter controlling the dimensions of domain */ +#define MUB 0.2 /* parameter controlling the dimensions of domain */ +#define NPOLY 3 /* number of sides of polygon */ +#define APOLY 0.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define APOLY_B 2.0 /* angle by which to turn polygon, in units of Pi/2 */ +#define MDEPTH 4 /* depth of computation of Menger gasket */ +#define MRATIO 3 /* ratio defining Menger gasket */ +#define MANDELLEVEL 1000 /* iteration level for Mandelbrot set */ +#define MANDELLIMIT 10.0 /* limit value for approximation of Mandelbrot set */ +#define FOCI 1 /* set to 1 to draw focal points of ellipse */ +#define NGRIDX 20 /* number of grid point for grid of disks */ +#define NGRIDY 20 /* number of grid point for grid of disks */ + +#define X_SHOOTER -0.2 +#define Y_SHOOTER -0.6 +#define X_TARGET 0.4 +#define Y_TARGET 0.7 /* shooter and target positions in laser fight */ + +#define ISO_XSHIFT_LEFT -1.65 +#define ISO_XSHIFT_RIGHT 0.4 +#define ISO_YSHIFT_LEFT -0.05 +#define ISO_YSHIFT_RIGHT -0.05 +#define ISO_SCALE 0.85 /* coordinates for isospectral billiards */ + +/* You can add more billiard tables by adapting the functions */ +/* xy_in_billiard and draw_billiard below */ + +/* Physical parameters of wave equation */ + +#define TWOSPEEDS 1 /* set to 1 to replace hardcore boundary by medium with different speed */ +#define OSCILLATE_LEFT 0 /* set to 1 to add oscilating boundary condition on the left */ +#define OSCILLATE_TOPBOT 0 /* set to 1 to enforce a planar wave on top and bottom boundary */ + +#define OMEGA 0.024 /* frequency of periodic excitation */ +#define AMPLITUDE 1.0 /* amplitude of periodic excitation */ +#define DAMPING 0.0 /* damping of periodic excitation */ +#define COURANT 0.1 /* Courant number */ +#define COURANTB 0.063 /* Courant number in medium B */ +#define GAMMA 0.0 /* damping factor in wave equation */ +#define GAMMAB 0.0 /* damping factor in wave equation */ +#define GAMMA_SIDES 1.0e-4 /* damping factor on boundary */ +#define GAMMA_TOPBOT 1.0e-7 /* damping factor on boundary */ +#define KAPPA 0.0 /* "elasticity" term enforcing oscillations */ +#define KAPPA_SIDES 5.0e-4 /* "elasticity" term on absorbing boundary */ +#define KAPPA_TOPBOT 0.0 /* "elasticity" term on absorbing boundary */ +/* The Courant number is given by c*DT/DX, where DT is the time step and DX the lattice spacing */ +/* The physical damping coefficient is given by GAMMA/(DT)^2 */ +/* Increasing COURANT speeds up the simulation, but decreases accuracy */ +/* For similar wave forms, COURANT^2*GAMMA should be kept constant */ + +#define ADD_OSCILLATING_SOURCE 1 /* set to 1 to add an oscillating wave source */ +#define OSCILLATING_SOURCE_PERIOD 20 /* period of oscillating source */ +#define ALTERNATE_OSCILLATING_SOURCE 1 /* set to 1 to alternate sign of oscillating source */ +#define NSOURCES 48 /* number of sources */ + +/* Boundary conditions, see list in global_pdes.c */ + +#define B_COND 4 + +/* Parameters for length and speed of simulation */ + +#define NSTEPS 2600 /* number of frames of movie */ +#define NVID 7 /* number of iterations between images displayed on screen */ +#define NSEG 100 /* number of segments of boundary */ +#define INITIAL_TIME 0 /* time after which to start saving frames */ +#define COMPUTE_ENERGIES 0 /* set to 1 to compute and print energies */ +#define BOUNDARY_WIDTH 2 /* width of billiard boundary */ + +#define PAUSE 100 /* number of frames after which to pause */ +#define PSLEEP 1 /* sleep time during pause */ +#define SLEEP1 1 /* initial sleeping time */ +#define SLEEP2 1 /* final sleeping time */ +#define MID_FRAMES 20 /* number of still frames between movies */ +#define END_FRAMES 100 /* number of still frames at end of movie */ +#define FADE 1 /* set to 1 to fade at end of movie */ + +/* Parameters of initial condition */ + +#define INITIAL_AMP 1.0 /* amplitude of initial condition */ +#define INITIAL_VARIANCE 0.00001 /* variance of initial condition */ +#define INITIAL_WAVELENGTH 0.025 /* wavelength of initial condition */ + +/* Plot type, see list in global_pdes.c */ + +#define PLOT 0 + +#define PLOT_B 5 + +/* Color schemes */ + +#define COLOR_PALETTE 17 /* Color palette, see list in global_pdes.c */ +#define COLOR_PALETTE_B 13 /* Color palette, see list in global_pdes.c */ + +#define BLACK 1 /* background */ +#define BLACK_TEXT 1 /* set to 1 to write text in black instead of white */ + +#define COLOR_SCHEME 3 /* choice of color scheme, see list in global_pdes.c */ + +#define SCALE 0 /* set to 1 to adjust color scheme to variance of field */ +#define SLOPE 1.0 /* sensitivity of color on wave amplitude */ +#define PHASE_FACTOR 1.0 /* factor in computation of phase in color scheme P_3D_PHASE */ +#define PHASE_SHIFT 0.0 /* shift of phase in color scheme P_3D_PHASE */ +#define ATTENUATION 0.0 /* exponential attenuation coefficient of contrast with time */ +#define E_SCALE 100.0 /* scaling factor for energy representation */ +#define LOG_SCALE 1.0 /* scaling factor for energy log representation */ +#define LOG_SHIFT 2.5 /* shift of colors on log scale */ +#define FLUX_SCALE 5.0e3 /* scaling factor for enegy flux represtnation */ +#define RESCALE_COLOR_IN_CENTER 0 /* set to 1 to decrease color intentiy in the center (for wave escaping ring) */ + +#define COLORHUE 260 /* initial hue of water color for scheme C_LUM */ +#define COLORDRIFT 0.0 /* how much the color hue drifts during the whole simulation */ +#define LUMMEAN 0.5 /* amplitude of luminosity variation for scheme C_LUM */ +#define LUMAMP 0.3 /* amplitude of luminosity variation for scheme C_LUM */ +#define HUEMEAN 220.0 /* mean value of hue for color scheme C_HUE */ +#define HUEAMP -220.0 /* amplitude of variation of hue for color scheme C_HUE */ + +#define DRAW_COLOR_SCHEME 0 /* set to 1 to plot the color scheme */ +#define COLORBAR_RANGE 1.5 /* scale of color scheme bar */ +#define COLORBAR_RANGE_B 12.5 /* scale of color scheme bar for 2nd part */ +#define ROTATE_COLOR_SCHEME 0 /* set to 1 to draw color scheme horizontally */ + + +/* For debugging purposes only */ +#define FLOOR 0 /* set to 1 to limit wave amplitude to VMAX */ +#define VMAX 5.0 /* max value of wave amplitude */ + +/* the following constants are only used by wave_billiard and wave_3d so far */ +#define COMPARISON 0 /* set to 1 to compare two different patterns */ +#define OSCILLATION_SCHEDULE 3 /* oscillation schedule, see list in global_pdes.c */ +#define ACHIRP 0.2 /* acceleration coefficient in chirp */ +#define DAMPING 0.0 /* damping of periodic excitation */ +/* end of constants only used by wave_billiard and wave_3d */ + +/* for compatibility with sub_wave and sub_maze */ +#define NXMAZE 7 /* width of maze */ +#define NYMAZE 7 /* height of maze */ +#define MAZE_MAX_NGBH 4 /* max number of neighbours of maze cell */ +#define RAND_SHIFT 24 /* seed of random number generator */ +#define MAZE_XSHIFT 0.0 /* horizontal shift of maze */ +#define ADD_POTENTIAL 0 +#define POT_MAZE 7 +#define POTENTIAL 0 +#define MAZE_WIDTH 0.02 /* half width of maze walls */ +#define WAVE_PACKET_SOURCE_TYPE 1 /* type of wave packet sources */ +#define N_WAVE_PACKETS 15 /* number of wave packets */ +#define OSCIL_LEFT_YSHIFT 0.0 /* y-dependence of left oscillation (for non-horizontal waves) */ +#define DRAW_WAVE_PROFILE 0 /* set to 1 to draw a profile of the wave */ +/* end of constants only used by sub_wave and sub_maze */ + +``` + + +