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Even Number of Triangles for Any 3D model - Printable Version

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Even Number of Triangles for Any 3D model - unknown - Sep 21, 2005 06:26 AM

Is it impossible for a 3D model to have an odd number of triangles?
Assuming its got every edge has two triangles.


Even Number of Triangles for Any 3D model - Zekaric - Sep 21, 2005 08:34 AM

If the surface is properly formed, no (I think); but if it has degenerate triangles, meaning two or more of a triangle's points are coincident, then all bets are off.

I'm still trying to think of a case where it may fail but I'm not finding it.