/* Global variables and parameters for lennardjones */ /* Basic math */ #define PI 3.141592654 #define DPI 6.283185307 #define PID 1.570796327 /* shape of domain */ #define D_CIRCLES 20 /* several circles */ #define D_CIRCLES_IN_RECT 201 /* several circles in a rectangle */ #define NMAXCIRCLES 20000 /* total number of circles/polygons (must be at least NCX*NCY for square grid) */ #define MAXNEIGH 20 /* max number of neighbours kept in memory */ #define NMAXOBSTACLES 100 /* max number of obstacles */ #define NMAXSEGMENTS 100 /* max number of repelling segments */ #define C_SQUARE 0 /* square grid of circles */ #define C_HEX 1 /* hexagonal/triangular grid of circles */ #define C_RAND_DISPLACED 2 /* randomly displaced square grid */ #define C_RAND_PERCOL 3 /* random percolation arrangement */ #define C_RAND_POISSON 4 /* random Poisson point process */ #define C_CLOAK 5 /* invisibility cloak */ #define C_CLOAK_A 6 /* first optimized invisibility cloak */ #define C_LASER 7 /* laser fight in a room of mirrors */ #define C_POISSON_DISC 8 /* Poisson disc sampling */ #define C_GOLDEN_MEAN 10 /* pattern based on vertical shifts by golden mean */ #define C_GOLDEN_SPIRAL 11 /* spiral pattern based on golden mean */ #define C_SQUARE_HEX 12 /* alternating between square and hexagonal/triangular */ #define C_ONE 97 /* one single circle, as for Sinai */ #define C_TWO 98 /* two concentric circles of different type */ #define C_NOTHING 99 /* no circle at all, for comparisons */ /* pattern of additional obstacles */ #define O_CORNERS 0 /* obstacles in the corners (for Boy b.c.) */ #define O_GALTON_BOARD 1 /* Galton board pattern */ #define O_GENUS_TWO 2 /* obstacles in corners of L-shape domeain (for genus 2 b.c.) */ /* pattern of additional repelling segments */ #define S_RECTANGLE 0 /* segments forming a rectangle */ #define S_CUP 1 /* segments forming a cup (for increasing gravity) */ #define S_HOURGLASS 2 /* segments forming an hour glass */ #define S_PENTA 3 /* segments forming a pentagon with 3 angles of 120° and 2 right angles */ #define S_CENTRIFUGE 4 /* segments forming "centrifuge" (polygon with radial segments) */ #define S_POLY_ELLIPSE 5 /* segments forming a polygonal approximation of an ellipse */ /* particle interaction */ #define I_COULOMB 0 /* Coulomb force */ #define I_LENNARD_JONES 1 /* Lennard-Jones force */ #define I_LJ_DIRECTIONAL 2 /* Lennard-Jones with direction dependence of square symmetry */ #define I_LJ_PENTA 3 /* Lennard-Jones with pentagonal symmetry */ #define I_GOLDENRATIO 4 /* Lennard-Jones type with equilibria related by golden ratio */ #define I_LJ_DIPOLE 5 /* Lennard-Jones with a dipolar angle dependence */ #define I_LJ_QUADRUPOLE 6 /* Lennard-Jones with a quadropolar angle dependence */ #define I_LJ_WATER 7 /* model for water molecule */ /* Boundary conditions */ #define BC_SCREEN 0 /* harmonic boundary conditions outside screen area */ #define BC_RECTANGLE 1 /* harmonic boundary conditions on a resizeable rectangle */ #define BC_CIRCLE 2 /* harmonic boundary conditions outside a moving circle */ #define BC_PERIODIC 3 /* periodic boundary conditions */ #define BC_PERIODIC_CIRCLE 4 /* periodic boundary conditions and harmonic b.c. outside moving circle */ #define BC_EHRENFEST 5 /* Ehrenfest urn-type configuration */ #define BC_PERIODIC_FUNNEL 6 /* funnel with periodic boundary conditions */ #define BC_RECTANGLE_LID 7 /* rectangular container with moving lid */ #define BC_PERIODIC_TRIANGLE 8 /* periodic boundary conditions and harmonic b.c. outside moving triangle */ #define BC_RECTANGLE_WALL 9 /* rectangular container with vertical movable wall */ #define BC_KLEIN 11 /* Klein bottle (periodic with twisted vertical parts) */ #define BC_SCREEN_BINS 12 /* harmonic boundary conditions outside screen area plus "bins" (for Galton board) */ #define BC_BOY 13 /* Boy surface/projective plane (periodic with twisted horizontal and vertical parts) */ #define BC_GENUS_TWO 14 /* surface of genus 2, obtained by identifying opposite sides of an L shape */ /* Regions for partial thermostat couplings */ #define TH_VERTICAL 0 /* only particles at the right of x = PARTIAL_THERMO_SHIFT are coupled */ #define TH_INSEGMENT 1 /* only particles in region defined by segments are coupled */ /* Plot types */ #define P_KINETIC 0 /* colors represent kinetic energy of particles */ #define P_NEIGHBOURS 1 /* colors represent number of neighbours */ #define P_HEALTH 2 /* colors represent health (for SIR model) */ #define P_BONDS 3 /* draw lattice based on neighbours */ #define P_ANGLE 4 /* colors represent angle/spin of particle */ #define P_TYPE 5 /* colors represent type of particle */ #define P_DIRECTION 6 /* colors represent direction of velocity */ #define P_ANGULAR_SPEED 7 /* colors represent angular speed */ #define P_DIRECT_ENERGY 8 /* hues represent direction, luminosity represents energy */ #define P_DIFF_NEIGHB 9 /* colors represent number of neighbours of different type */ /* Color schemes */ #define C_LUM 0 /* color scheme modifies luminosity (with slow drift of hue) */ #define C_HUE 1 /* color scheme modifies hue */ #define C_PHASE 2 /* color scheme shows phase */ #define C_ONEDIM 3 /* use preset 1d color scheme (for Turbo, Viridis, Magma, Inferno, Plasma, Twilight) */ #define C_ONEDIM_LINEAR 4 /* use preset 1d color scheme with linear scale */ /* Color palettes */ #define COL_JET 0 /* JET color palette */ #define COL_HSLUV 1 /* HSLUV color palette (perceptually uniform) */ #define COL_GRAY 2 /* grayscale */ #define COL_TURBO 10 /* TURBO color palette (by Anton Mikhailov) */ #define COL_VIRIDIS 11 /* Viridis color palette */ #define COL_MAGMA 12 /* Magma color palette */ #define COL_INFERNO 13 /* Inferno color palette */ #define COL_PLASMA 14 /* Plasma color palette */ #define COL_CIVIDIS 15 /* Cividis color palette */ #define COL_PARULA 16 /* Parula color palette */ #define COL_TWILIGHT 17 /* Twilight color palette */ #define COL_TWILIGHT_SHIFTED 18 /* Shifted twilight color palette */ #define COL_TURBO_CYCLIC 101 /* TURBO color palette (by Anton Mikhailov) corrected to be cyclic, beta */ typedef struct { double xc, yc, radius; /* center and radius of circle */ double angle; /* angle of particle's "spin" */ short int active; /* circle is active */ double energy; /* dissipated energy */ double vx; /* x velocity of particle */ double vy; /* y velocity of particle */ double omega; /* angular velocity of particle */ double mass_inv; /* inverse of particle mass */ double inertia_moment_inv; /* inverse of moment of inertia */ double fx; /* x component of force on particle */ double fy; /* y component of force on particle */ double torque; /* torque on particle */ short int thermostat; /* whether particle is coupled to thermostat */ int hashcell; /* hash cell in which particle is located */ int neighb; /* number of neighbours within given distance */ int diff_neighb; /* number of neighbours of different type */ int hash_nneighb; /* number of neighbours in hashgrid */ int hashneighbour[9*HASHMAX]; /* particle numbers of neighbours in hashgrid */ double deltax[9*HASHMAX]; /* relative position of neighbours */ double deltay[9*HASHMAX]; /* relative position of neighbours */ short int type; /* type of particle, for mixture simulations */ short int interaction; /* type of interaction */ double eq_dist; /* equilibrium distance */ double spin_range; /* range of spin-spin interaction */ double spin_freq; /* angular frequency of spin-spin interaction */ } t_particle; typedef struct { int number; /* total number of particles in cell */ int particles[HASHMAX]; /* numbers of particles in cell */ int nneighb; /* number of neighbouring cells */ int neighbour[9]; /* numbers of neighbouring cells */ } t_hashgrid; typedef struct { double xc, yc, radius; /* center and radius of circle */ short int active; /* circle is active */ double energy; /* dissipated energy */ double vx; /* x velocity of particle */ double vy; /* y velocity of particle */ double mass_inv; /* inverse of particle mass */ double fx; /* x component of force on particle */ double fy; /* y component of force on particle */ int hashx; /* hash grid positions of particles */ int hashy; /* hash grid positions of particles */ int neighb; /* number of neighbours */ int health; /* 0 = healthy, 1 = infected, 2 = recovered */ double infected_time; /* time since infected */ int protected; /* 0 = not protected, 1 = protected */ } t_person; typedef struct { double xc, yc, radius; /* center and radius of circle */ short int active; /* circle is active */ } t_obstacle; typedef struct { double x1, x2, y1, y2; /* extremities of segment */ double nx, ny; /* normal vector */ double c; /* constant term in cartesian eq nx*x + ny*y = c */ double length; /* length of segment */ short int concave; /* corner is concave, to add extra repelling force */ double angle1, angle2; /* angles in which concave corners repel */ short int active; /* segment is active */ double x01, x02, y01, y02; /* initial values of extremities, in case of rotation/translation */ double nx0, ny0; /* initial normal vector */ double angle01, angle02; /* initial values of angles in which concave corners repel */ double fx, fy; /* x and y-components of force on segment */ } t_segment; typedef struct { double xc, yc; /* center of circle */ } t_tracer; int ncircles, nobstacles, nsegments, counter = 0;