YouTube-simulations/global_particles.c
nilsberglund-orleans f56b8a0ab4
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2021-07-18 15:06:59 +02:00

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C

double circlex[NMAXCIRCLES], circley[NMAXCIRCLES], circlerad[NMAXCIRCLES]; /* position and radius of circular scatters */
short int circleactive[NMAXCIRCLES]; /* tells which circular scatters are active */
int ncircles = NMAXCIRCLES; /* actual number of circles, can be decreased e.g. for random patterns */
/* some basic math */
#define PI 3.141592654
#define DPI 6.283185307
#define PID 1.570796327
/* Choice of the billiard table */
#define D_RECTANGLE 0 /* rectangular domain */
#define D_ELLIPSE 1 /* elliptical domain */
#define D_STADIUM 2 /* stadium-shaped domain */
#define D_SINAI 3 /* Sinai billiard */
#define D_DIAMOND 4 /* diamond-shaped billiard */
#define D_TRIANGLE 5 /* triangular billiard */
#define D_ANNULUS 7 /* annulus */
#define D_POLYGON 8 /* polygon */
#define D_REULEAUX 9 /* Reuleaux and star shapes */
#define D_FLOWER 10 /* Bunimovich flower */
#define D_ALT_REU 11 /* alternating between star and Reuleaux */
#define D_ANGLE 12 /* angular sector */
#define D_LSHAPE 13 /* L-shaped billiard for conical singularity */
#define D_GENUSN 14 /* polygon with identifies opposite sides */
#define D_CIRCLES 20 /* several circles */
#define C_FOUR_CIRCLES 0 /* four circles almost touching each other */
#define C_SQUARE 1 /* square grid of circles */
#define C_HEX 2 /* hexagonal/triangular grid of circles */