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Nicholas Bishop d35d0e38ce Add mask-drawing support to GPU_Buffers. ...

This is the last commit of the sculpt masking merge. Documentation:
http://wiki.blender.org/index.php/User:Nicholasbishop/PaintMasks

Thanks to Brecht for reviewing!

* For VBO, add color to the VertexBufferFormat structure as three
  unsigned bytes. Since mask elements are scalar the three color
  components are identical to eachother, but the fixed-function OpenGL
  pipeline requires colors to be either three or four components.

* For the same reason, multires VBO drawing now copies into the
  VertexBufferFormat format as well.

* Regression: material colors will not show up correctly now, masks
  colors are overriding. Not sure how to fix this nicely (would be
  much easier to fix if drawing with vertex shaders.)

* Also, masks will only draw PBVH drawing, so only 'solid' drawing
  will work correctly with masks.

2012-05-10 20:36:34 +00:00

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