> There seems to be a bug when testing inside() with some prisms and a point
> on the bisector of an angle

The prism insidedness test probably uses a trick that looks at how many
edges are to the left or right of the point being tested, and checks if that
number is odd. If there's a vertex of the prism along that line, then it
might not work right. So try translating the prism a tiny bit along the z
axis.

 - Slime
 [ http://www.slimeland.com/ ]

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