private void runControlUpdate(float tpf) {
        if (controls.isEmpty()) {
            return;
        }

        for (Control c : controls.getArray()) {
            c.update(tpf);
        }
    }
Computes this Spatial's world bounding volume in the most efficient
manner possible.
jme3-core/src/main/java/com/jme3/scene/Spatial.java