Thanks. You are, of course, correct. I guess what I'm asking is how much "housekeeping" I have to do myself. If I translate the spheres in the space, is there some method I can use to get the new center point of the sphere (e.g. sphere.getCenter()) or do I have to translate the sphere and also translate the center point as well?
You can do something like this
Point3f pos = new Point3f(); Transform3D tr = new Transform3D(); sphere.getLocalToVworld(tr); tr.transform(pos);
In pos you'll find the center of the coord system where the sphere is. If the sphere is centered around the origin, true for sun.utils.Sphere, you have the sphere center.
Bye
Lorenzo
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