protected void registerInputTriggers() {
super.registerInputTriggers();
// Add mouse-over to show labels
_logicalLayer.registerTrigger(new InputTrigger(new MouseMovedCondition(), new TriggerAction() {
public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
// Put together a pick ray
final Vector2 pos = Vector2.fetchTempInstance().set(inputStates.getCurrent().getMouseState().getX(),
inputStates.getCurrent().getMouseState().getY());
final Ray3 pickRay = Ray3.fetchTempInstance();