Assuming a closed, but concave and complex piece of geometry and that
the directions I am using are nice, neat axially aligned vectors, is
it sufficient to assume a point is inside if testing in both
directions in one dimension hits surfaces that face out/away from the
point of test? That is, the first surface to either direction.
And as an opposite, is it safe to assume that a test in either
direction in one dimension hits a surface that faces toward the point
means the point is outside?
If more info is needed, I'll explain in detail, but I didn't want to
post unecessary details (but at this point it's hard to say what is
and is not necessary).
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