@Override
        protected void controlUpdate( float tpf ) {
            if( spatial != null ) {
                spatial.rotate(rotate[0] * tpf, rotate[1] * tpf, rotate[2] * tpf);
            }
        }
Tests a deep scene with an unrecommended amount of objects.

 @author    Paul Speed
jme3-examples/src/main/java/jme3test/scene/TestSceneStress.java