mtg.getTransformGroup(1).getTransform(rtrans);
Transform3D ttrans = new Transform3D();
mtg.getTransformGroup(3).getTransform(ttrans);
Transform3D ptrans = new Transform3D();
Transform3D ftrans = new Transform3D();
ftrans.rotX(Math.PI/2);
ptrans.setTranslation(new Vector3d(0.0, -centerDistance, 1.0));
TransformGroup t = new TransformGroup(ttrans);
t.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
TransformGroup p = new TransformGroup(ptrans);