// For debug
public static void printOrthoNodes () {
// Print ortho nodes attached to the world manager
WorldManager wm = ClientContextJME.getWorldManager();
for (int i=0; i < wm.numEntities(); i++) {
Entity e = wm.getEntity(i);
RenderComponent rc = (RenderComponent) e.getComponent(RenderComponent.class);
if (rc == null || !rc.getOrtho()) continue;
System.err.println("Ortho node = " + rc.getSceneRoot());
GraphicsUtils.printNode(rc.getSceneRoot());