Function RenderPastPortal

Descent3/render.cpp:258–273

Determine if you should render through a portal Parameters: rp - the room the portal is in pp - the portal we're checking Returns: true if you should render the room to which the portal connects

//					pp - the portal we're checking
// Returns:		true if you should render the room to which the portal connects
static inline bool RenderPastPortal(room *rp, portal *pp) {
  // If we don't render the portal's faces, then we see through it
  if (!(pp->flags & PF_RENDER_FACES))
    return 1;
  if (!UseHardware) // Don't render alpha stuff in software
    return 0;
  // Check if the face's texture has transparency
  face *fp = &rp->faces[pp->portal_face];
  if (GameTextures[fp->tmap].flags & TF_PROCEDURAL)
    return 1;
  int bm_handle = GetTextureBitmap(fp->tmap, 0);
  if (GetFaceAlpha(fp, bm_handle))
    return 1; // Face has alpha or transparency, so we can see through it
  else
    return 0; // Not transparent, so no render past
}

// used during rendering as count of items in render_list[]
int N_render_rooms;