This doesn't seem to have been mentioned before, but there's a logical
extension to solid meshes: solids composed of other finite patch primitives.
The same "insidedness" test that is used on solid meshes can be applied to
any closed shape, whether it is composed of solid primitives, triangles,
bezier patches, discs, or anything else.  As long as the object is closed,
the test works.  This would be quite useful for people using HamaPatch for
modeling of solid objects.

--
Mark

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