Colony

#define CREATE(id, ...) (create_func[id](__VA_ARGS__))

#define PBBOX(b) {printf("(%g,%g) --> (%g, %g)\n",(b).p1.x,(b).p1.y,(b).p2.x,\

						  (b).p2.y);}

#define MAX_OBJS 100

#define BUF_SIZE 512

double collide_circle(ray_t *ray, object_t *obj);

double collide_rect(ray_t *ray, object_t *obj);

double collide_poly(ray_t *ray, object_t *obj);

/*  Array of function pointers to the specific collide functions.

 *  Must be listed in the same order as IDs */

extern double (*collide_func[NUM_SHAPES])(ray_t *ray, object_t *obj);