/** returns the non-transformed tile that belongs to a certain position of the grid */
 public ccQuad3 originalTile(ccGridSize pos) {
   CCTiledGrid3D g = (CCTiledGrid3D) target.getGrid();
   return g.originalTile(pos);
 }
 /** sets a new tile to a certain position of the grid */
 public void setTile(ccGridSize pos, ccQuad3 coords) {
   CCTiledGrid3D g = (CCTiledGrid3D) target.getGrid();
   g.setTile(pos, coords);
 }
 public CCGridBase grid() {
   return CCTiledGrid3D.make(gridSize);
 }