Is lazily-initialized array owned by the SubdivCCG. Allows to access index of a first grid of a given face in the flat array of grids. Currently unused, but is needed for multires bake.
Is lazily-initialized array owned by the SubdivCCG. Allows to access index of a first grid of a given face in the flat array of grids. Currently unused, but is needed for multires bake.