Bouncing balls (C)

This example is a simple test of collision detection methods.

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include "rebound.h"

int main(int argc, char* argv[]){
    struct reb_simulation* r = reb_create_simulation();
    // Setup constants
    r->integrator    = REB_INTEGRATOR_LEAPFROG;
    r->gravity    = REB_GRAVITY_BASIC;
    r->collision    = REB_COLLISION_DIRECT;
    r->collision_resolve = reb_collision_resolve_hardsphere;
    r->usleep    = 1000;            // Slow down integration (for visualization only)
    r->dt = 1e-2;

    reb_configure_box(r, 3.0, 1, 1, 1);

    // Initial conditions
    {
        struct reb_particle p = {0};
        p.x  = 1; p.y  = 1; p.z  = 1;
        p.m  = 1;
        p.r  = 0.1;
        reb_add(r, p);
    }
    {
        struct reb_particle p = {0};
        p.x  = -1; p.y  = -1; p.z  = -1;
        p.m  = 1;
        p.r  = 0.1;
        reb_add(r, p);
    }

    reb_integrate(r, INFINITY);
}

This example is located in the directory examples/bouncing_balls