Function ShootRayToVolumePoint

editor/rad_cast.cpp:223–251

Returns 1 if a src vector can hit dest vector for a volume point

// Returns 1 if a src vector can hit dest vector for a volume point
int ShootRayToVolumePoint(vector *src, vector *dest, int start_room) {
  fvi_info hit_info;
  fvi_query fq;

  if (UseBSP) {
    int fate = BSPRayOccluded(src, dest, MineBSP.root);
    if (!fate)
      return 1;
    return 0;
  }

  // shoot a ray from the light position to the current vertex
  fq.p0 = src;
  fq.p1 = dest;

  fq.startroom = start_room;

  fq.rad = 0.0f;
  fq.flags = FQ_CHECK_OBJS | FQ_IGNORE_NON_LIGHTMAP_OBJECTS | FQ_NO_RELINK | FQ_IGNORE_RENDER_THROUGH_PORTALS;
  fq.thisobjnum = -1;
  fq.ignore_obj_list = NULL;

  int fate = fvi_FindIntersection(&fq, &hit_info);

  float dist = vm_VectorDistance(&hit_info.hit_pnt, dest);
  if (dist > .1)
    return 0;
  return 1;
}

void ClipSatelliteToTerrain(vector *answer, vector *src_vec, vector *dest_vec) {
  vector cur_vec = *src_vec;