Bastien Montagne 877f441628 BKE_mesh: add polygon flipping tools.
Those new functions invert the winding of polygons, effectively inverting their normals.

A helper was also added to allow swapping two items in customdata layers.

Being able to invert normals outside of BMesh area is very important in several places,
like IO scripts or customnormals modifiers...

Reviewers: campbellbarton

Differential Revision: https://developer.blender.org/D1814
2016-02-28 15:29:56 +01:00
2016-02-20 15:28:25 +01:00
2013-12-24 22:57:27 +06:00
2016-01-04 14:20:48 +05:00
2010-10-13 14:44:22 +00:00
2016-02-10 00:26:12 +11:00
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841 MiB
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C++ 78%
Python 14.9%
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Other 0.9%