Function AttachRoom

editor/HRoom.cpp:701–793

Attach an already-placed room

// Attach an already-placed room
void AttachRoom() {
  vector basecenter, attcenter;
  room *baseroomp, *attroomp, *newroomp;
  int baseface, attface;

  ASSERT(Placed_room != -1);

  // Set some vars
  baseroomp = Placed_baseroomp;
  baseface = Placed_baseface;
  attroomp = &Rooms[Placed_room];
  attface = Placed_room_face;
  attcenter = Placed_room_origin;
  basecenter = Placed_room_attachpoint;

  // Get the new room
  newroomp = CreateNewRoom(attroomp->num_verts, attroomp->num_faces, 0);
  if (newroomp == NULL) {
    OutrageMessageBox("Cannot attach room: No free rooms.");
    return;
  }

  // Rotate verts, copying into new room
  for (int i = 0; i < attroomp->num_verts; i++)
    newroomp->verts[i] = ((attroomp->verts[i] - attcenter) * Placed_room_rotmat) + basecenter;

  // Copy faces to new room
  for (i = 0; i < attroomp->num_faces; i++) {
    CopyFace(&newroomp->faces[i], &attroomp->faces[i]);
#ifdef NEWEDITOR
    LevelTexIncrementTexture(attroomp->faces[i].tmap);
#endif
  }

  // Recompute normals for the faces
  if (!ResetRoomFaceNormals(newroomp))
    Int3(); // Get Matt

  // Copy other values for this room
  newroomp->flags = attroomp->flags;
  newroomp->num_portals = 0;

  // Check for terrain or mine room
  if (baseroomp == NULL) { // a terrain room

    // Flag this as an external room
    newroomp->flags |= RF_EXTERNAL;

    // Delete the attach face, which should now be facing the ground
    DeleteRoomFace(newroomp, attface);
  } else { // a mine room

    // Clip the connecting faces against each other
    if (!ClipFacePair(newroomp, attface, baseroomp, baseface)) {
      OutrageMessageBox("Error making portal -- faces probably don't overlap.");
      FreeRoom(newroomp);
      return;
    }