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Avoid zero area tris from ngon tessellation

Authored by Campbell Barton (campbellbarton) on Mar 27 2017, 2:01 AM.



This patch avoids creating degenerate tris while tessellating. since currently the bmesh boolean modifier doesn't properly handle zero area faces. See: T46988

Note that faces with zero area edges should probably be supported too, so in some ways this is a workaround.
Posting patch for reference since it may be worth applying just to improve the output in the common case where input geometry isn't degenerate.

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rB Blender