YouTube-simulations/global_ljones.c

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2021-12-28 15:42:56 +01:00
/* 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 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 */
/* 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 */
#define I_LJ_PENTA 3 /* Lennard-Jones with pentagonal symmetry */
#define I_GOLDENRATIO 4 /* Lennard-Jones type with equilibria related by golden ratio */
/* 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 */
/* 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 */
/* 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) */
/* Color palettes */
#define COL_JET 0 /* JET color palette */
#define COL_HSLUV 1 /* HSLUV color palette (perceptually uniform) */
#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 */
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 neighbours[MAXNEIGH]; /* coordinates of neighbours */
double nghangle[MAXNEIGH]; /* angles of neighbours */
} t_particle;
typedef struct
{
int number; /* total number of particles in cell */
int particles[HASHMAX]; /* numbers of particles in cell */
} 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 = sane, 1 = infected, 2 = recovered */
double infected_time; /* time since infected */
int protected; /* 0 = not protected, 1 = protected */
} t_person;
int ncircles, counter = 0;