bbX.set(cam.getLeft()).negateLocal().multLocal(currentSize);
bbX.set(cam.getLeft()).multLocal(currentSize);
  public void updateVerts() {    Camera cam = parent.getCamera();    bbX.set(cam.getLeft()).negateLocal().multLocal(currentSize);    bbY.set(cam.getUp()).multLocal(currentSize);    location.subtract(bbX, verts[0]).subtractLocal(bbY);    location.add(bbX, verts[1]).subtractLocal(bbY);    location.add(bbX, verts[2]).addLocal(bbY);    location.subtract(bbX, verts[3]).addLocal(bbY);  }