Blender Git Loki

Fixed sculpt colors undo for mesh pbvh.

Added autosmooth-like option to run vcol boundary tool in paint tool

Fixed color boundary tool for faces pbvh

Added an icon for new sculpt colors boundary smooth tool

Merge remote-tracking branch 'origin' into temp_bmesh_multires

Adjust weighting for color boundary tool

* Added a "color boundary" tool that tries to smooth out vcol boundaries

Added face set support to dyntopo. Still need to finish "edit face
sets" tool and do more testing.

Enabled dyntopo for sharp brush. Also fixed paint brush strength being
too strong with dyntopo enabled.

Merge remote-tracking branch 'origin' into temp_bmesh_multires

Fixed bug with multires editmode code messing up loop indices for draw
code.

Also fixed a bug in dyntopo ray tracing, where r_active_vertex_index
wasn't always being set.

More fixes for sculpt vertex color undo. Moved one of the undo pushes
outside a thread, since dyntopo undo is not thread safe.

Tried to fix sculpt vcol paint undo. It's better, but I still need to
go through and thorougly analyze just what the undo stack is doing.

Paint brush no long SCULPT_undo_push_node per dab (except for first
stroke) for dyntopo. Instead it updates the original vertex color
customdata layer.

Calling into the undo system destroys threading with dyntopo, as its
undo code is single-threaded.

Try to make SCULPT_orig_vert_data_init avoid allocating undo nodes,
which calls into BMLog which, while now threadsafe (ish?) causes
threads to get bogged down in lock contention.

Remove debugging clang keyword. It's not #ifdef'd code, but still.

* Edge queue creation for dyntopo edge split/collapse is now
multithreaded.
* Worked on ProxyVert system, but it still needs more work. Issue is keeping
topological layers (reasonably) up to date without it being slow.
* Fixed memory leak in bmlog.

Fixed a variety of memory corruption bugs

Fixed bug with original coordinates/normals not being set when
dyntopo pbvh is first built

* Fix bug in BKE_pbvh_node_color_buffer_get.