Function AttachGroup

editor/Group.cpp:466–622

Attach the already-placed group

// Attach the already-placed group
void AttachGroup() {
  vector basecenter, attcenter;
  room *baseroomp, *attroomp;
  int baseface, attface;
  int room_xlate[MAX_ROOMS];
  int r;

  ASSERT(Placed_group != NULL);

  // Set some vars
  baseroomp = Placed_baseroomp;
  baseface = Placed_baseface;
  attroomp = &Placed_group->rooms[Placed_group->attachroom];
  attface = Placed_group->attachface;
  attcenter = Placed_room_origin;
  basecenter = Placed_room_attachpoint;

  // Copy the rooms into the main room list, build the xlate table, and rotate the verts
  for (r = 0; r < Placed_group->nrooms; r++) {
    int roomnum;
    room *newroomp;

    // Get a new room & copy into it
    roomnum = GetFreeRoom(0);
    if (roomnum == -1) {
      OutrageMessageBox("Cannot attach group: Not enough free rooms.");
      for (int t = 0; t < r; t++) // delete the rooms we just created
        DeleteRoomFromMine(&Rooms[room_xlate[t]]);
      return;
    }
    newroomp = &Rooms[roomnum];
    CopyRoom(newroomp, &Placed_group->rooms[r]);
    room_xlate[r] = roomnum;

    // Rotate verts in the new rooms
    for (int i = 0; i < newroomp->num_verts; i++)
      newroomp->verts[i] = ((newroomp->verts[i] - attcenter) * Placed_room_rotmat) + basecenter;

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

  // Add portals for new rooms
  for (r = 0; r < Placed_group->nrooms; r++)
    for (int p = 0; p < Placed_group->rooms[r].num_portals; p++) {
      portal *pp = &Placed_group->rooms[r].portals[p];
      if (r < pp->croom) // only link lower to higher, so we don't double link
        LinkRoomsSimple(Rooms, room_xlate[r], pp->portal_face, room_xlate[pp->croom],
                        Placed_group->rooms[pp->croom].portals[pp->cportal].portal_face);

      // Copy the portal flags
      int new_portal_num = Rooms[room_xlate[r]].faces[pp->portal_face].portal_num;
      Rooms[room_xlate[r]].portals[new_portal_num].flags = pp->flags;
    }

  // Get pointer to the placed attachroom
  room *newroomp = &Rooms[room_xlate[Placed_group->attachroom]];