2228006d5b
Switch from face pointers to indices, with the following benefits: - Halve memory usage required for array (saves 16 MB with 1 million quads). - Allow better code reuse with index-based utilities. - Ease future replacement of `SubdivCCGFace` with mesh's face offsets. - Allow future replacement of array with `Mesh::corner_to_face_map()` - Potentially lower memory bandwidth required during multires evaluation - Simplify retrieval of index in `BKE_subdiv_ccg_grid_to_face_index`. For clarity, `gridfaces` was renamed to `grid_to_face_map`. Pull Request: https://projects.blender.org/blender/blender/pulls/111078
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