> That sounds similar to my second idea. It just seems to me that this
> would cause the outcoming angle to be very different from the incoming
> angle, but maybe that's indeed the case...

Actually the *magic* of math and physics resolves everything very easily.
My code is in an old version of visual basic which I don't have here at work
so I'll try to clean it up and post it when I get home.

-tgq

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