[JAVA3D] collision detection

[Christoph Wille]

Hello   I'd like to detect intersections of a sphere that is moving around in space with other objects (shape3D) . Then I need to extract the face of that object where it intersects the sphere.   Can anyone give me a hint how to realize such an intersection detection. Has anyone maybe written something similar that could help me to understand the problem.   I would really apreciate very much any help. Thanks a lot in advance   Chris