2e69b0cd0b
* Add BLI_pbvh_build_bmesh(), similar to the other PBVH builders but specialized for BMesh. Whereas the PBVH leaf nodes for mesh and grids only store a start-index and count into the primitive indices array, the BMesh version uses GHashes to store the full set of faces and vertices in leaf nodes * Update PBVH iterator to handle BMesh * Make some of the pbvh.c functions non-static so they can be used by the new pbvh_bmesh code * The BLI_pbvh_bmesh_update_topology() function is the main reason for adding BMesh support to the PBVH. This function is used during a sculpt stroke to dynamically collapse edges that are particular short and subdivide edges that are particularly long.