RSL_get_first_ray_of_...
Synopsis
#include "rsl.h"
Ray *RSL_get_first_ray_of_sweep(Sweep *s);
Ray *RSL_get_first_ray_of_volume(Volume *v);
Description
RSL_get_first_ray_of_sweep returns a pointer to the first ray pointer in the Sweep structure *s, if one exist. Otherwise NULL is returned. Similiarly, for RSL_get_first_ray_of_volume; it finds the first sweep and returns the first ray of that sweep.
Return value
Upon successful completion, a pointer to the Ray structure is returned. Otherwise, a NULL pointer is returned.
See also
RSL_get_first_sweep_of_volume
Author: John H. Merritt