Brecht Van Lommel
342e12d6d9
This makes changes to the opensubdiv module to support additional vertex data besides the vertex position, that is smootly interpolated the same way. This is different than varying data which is interpolated linearly. Fixes T96596: wrong generated texture coordinates with GPU subdivision. In that bug lazy subdivision would not interpolate orcos. Later on, this implementation can also be used to remove the modifier stack mechanism where modifiers are evaluated a second time for orcos, which is messy and inefficient. But that's a more risky change, this is just the part to fix the bug in 3.2. Differential Revision: https://developer.blender.org/D14973