Function CombineRooms

editor/HRoom.cpp:2717–2833

Combine the two rooms. base_rp stays, att_rp goes away Returns true if combine sucessful, false if can't join

// Combine the two rooms. base_rp stays, att_rp goes away
// Returns true if combine sucessful, false if can't join
bool CombineRooms(room *base_rp, room *att_rp) {
  int i;
  face *fp;
  bool connected = 0, rendered_portals = 0;

  // Make sure these rooms share a portal
  for (i = 0; i < base_rp->num_portals; i++) {
    if (base_rp->portals[i].croom == ROOMNUM(att_rp)) {
      connected = 1;
      if ((base_rp->faces[base_rp->portals[i].portal_face].flags & FF_HAS_TRIGGER) ||
          (att_rp->faces[att_rp->portals[base_rp->portals[i].cportal].portal_face].flags & FF_HAS_TRIGGER)) {
        OutrageMessageBox("Cannot combine rooms: a portal connecting them has a trigger.");
        return 0;
      }
      if ((base_rp->portals[i].flags & PF_RENDER_FACES) ||
          (att_rp->portals[base_rp->portals[i].cportal].flags & PF_RENDER_FACES)) {
        rendered_portals = 1;
      }
    }
  }

  if (!connected) {
    OutrageMessageBox("Cannot combine rooms: the rooms are not connected.");
    return 0;
  }

  if (rendered_portals) {
    if (OutrageMessageBox(
            MBOX_YESNO,
            "One or more of the portals connecting these rooms has the Render Faces flag set.  "
            "The rendered face will remain in the room after combine.\n\nDo you still want to combine?") != IDYES)
      return 0;
  }

  // Check for doors
  if (base_rp->doorway_data || att_rp->doorway_data) {
    OutrageMessageBox("Cannot combine rooms: one room is a door.");
    return 0;
  }

  // Allocate new verts & faces
  int first_new_vert = RoomAddVertices(base_rp, att_rp->num_verts);
  int first_new_face = RoomAddFaces(base_rp, att_rp->num_faces);

  // Copy verts to base room
  for (i = 0; i < att_rp->num_verts; i++)
    base_rp->verts[first_new_vert + i] = att_rp->verts[i];

  // Copy faces to base room
  for (i = 0, fp = &base_rp->faces[first_new_face]; i < att_rp->num_faces; fp++, i++) {

    // Copy the face
    CopyFace(fp, &att_rp->faces[i]);
    fp->flags = att_rp->faces[i].flags;

    // Update the vertices
    for (int v = 0; v < fp->num_verts; v++)
      fp->face_verts[v] += first_new_vert;