>   (By the way, even if you "translate" a torus or apply other
> transformations to it, the torus will still be sitting in the
> origin, so the transformations you apply to the torus will
> actually not affect the complexity of the ray-torus intersection
> solving.)
>

Uh-oh.  I was following you, agreeing with you, nodding my head, (and you
are right about the simplifications, at least in hand calculations, I've
done them; I don't know anything about the programming) until I got to this
part.  Could you explain this a bit further, at the risk of hijacking the
thread?

Thanks

Dave Matthews

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