rootGroup = new BranchGroup();
rootGroup.setName(name);
rootGroup.setUserData(this);
rootGroup.setPickable(true);
AmbientLight alight = new AmbientLight(true,new Color3f(0.5f,0.5f,0.5f));
rootGroup.addChild(alight);
lights = new DirectionalLight[1];
for (int i=0; i<lights.length; ++i) {