Campbell Barton
71879d665d
Code that handled merging & initializing custom-data from other meshes sometimes missed checks for this flag, causing bevel weights to lost when the mesh was converted to a BMesh. The following changes are a more general fix for T94197. - Add BM_mesh_copy_init_customdata_from_mesh_array which initializes custom-data from multiple meshes at once. As well as initializing custom-data layers from Mesh.cd_flag. This isn't essential for boolean, however it avoids the overhead of resizing custom-data layers. - Loading mesh data into a BMesh now respects Mesh.cd_flag instead of only checking if the BMesh custom-data-layer exists. Without this, the order of meshes passed to BM_mesh_bm_from_me could give different (incorrect) results. - Copying mesh data now copies `cd_flag` too. This is a precaution as in my tests evaluating modifiers these values always matched. Nevertheless it's correct to copy this value as custom-data it's self is being copied.