ce8f30f92c
OpenVDB has a voxel size limit defined by the determinant of the grid transform, which is equivalent to a uniform voxel size of `sqrt3(3e-15) ~= 1.44e-5`. The `mesh_to_density_grid` function was using an arbitrary threshold of `1.0e-5` for the uniform voxel size. In this case the voxel size is `~1.343e-5` so it passes the Blender threshold but crashes in OpenVDB. This fix adds some convenience functions to check for valid grid voxel size and transform based on the same determinant metric. This is now employed consistently in the mesh_to_density_grid, mesh_to_sdf_grid, and points_to_sdf_grid functions to avoid exceptions in OpenVDB. MOD_volume_to_mesh, node_geo_volume_to_mesh, BKE_mesh_remesh_voxel have not been modified, since they have their own error checks with larger thresholds. Pull Request: https://projects.blender.org/blender/blender/pulls/138481
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