// Add a spinning 3D box to show behind UI.
final Box box = new Box("Box", new Vector3(0, 0, 0), 5, 5, 5);
box.setModelBound(new BoundingBox());
box.setTranslation(new Vector3(0, 0, -15));
box.addController(new SpatialController<Box>() {
private final Matrix3 rotate = new Matrix3();
private double angle = 0;
private final Vector3 axis = new Vector3(1, 1, 0.5f).normalizeLocal();
public void update(final double time, final Box caller) {