[Blend2cs-user] UV-texturing bug on trapezoids and thingmesh support

[Frank W. Samuelson]

> 
> I just remember the issue. The problem is, that blender is able to have a 
> UV coordinate at each edge, while CS only allows 3 UV coords for the whole 
> polygon, so I simply fetched the first 3 ones in blend2cs, the more 
> correct aproach would be to split the quad into 2 triangles, however that 
> results in performance loss in CS. So we need a function to detect such 
> cases and only split if neccesary... I'll see if I can find the time for 
> this change, but I can't promise anything at the moment.
> 

I think you're right, Matze.   Gregor wrote blendconv to
perform this split, and blendconv works fine on this 
polygon where blend2cs doesn't.  I tried it on the .blend file that Martin 
posted to this list.  Blendconv splits every 4 sided polygon
and outputs only triangle polygons.

-Frank

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