Blender Git Loki

Sculpt: experiment with lock-free mempools
and fine grained locks.

Merge branch 'master' into temp-abc-features

Merge branch 'master' into temp-abc-features

Sculpt: fix crash in pose face set fk

Fix UI.

Merge branch 'master' into sculpt-dev

Also fixed bug with face set lasso
and face set from mask.

Remove attribute regexes.

This was too cumbersome to use.

Sculpt: bugfixes

* Fixed smooth bug with seam corners.
* Fixed crash.

Use panels to organize buttons in the modifier.

Fix missing null-terminator in BLI_string_join_arrayN

Although the documentation says so, the null-terminator was missing.
This could cause crashes when logging shader linking errors as shader
sources are empty in this case.

Merge branch 'master' into temp-abc-features

Generic structures to handle attributes, handle sculpt vcol as regular
color.

Sculpt: Implement accumulate for paint and
other fixes

* The paint brush now supports accumulate.
* Fixed bug with PBVH_FACES not setting
MSculptVert update flags correctly in
face set draw brush.
* Topology rake now has a mode where it
simply propegates directions from
boundaries.

Merge branch 'master' into asset-greasepencil

Merge remote-tracking branch 'origin/master' into temp-lineart-contained

Sculpt: Fix topology rake performance regression

* Don't use quite so many iterations
* Defer normals update

Sculpt: split operators from sculpt.c to sculpt_ops.c

Except for the main brush operator, that's still in sculpt.c.

Sculpt: Split the brushes from sculpt.c into sculpt_brushes.c.

* Also killed the warnings in sculpt_boundary.c

Sculpt: move dyntopo command to top of command list.

* Dyntopo is now run before other commands in the
brush command lists.
* Fixed nasty command subspacing bug.
* Added a missing RNA library override flag.

Add more regression tests for new obj exporter.

This adds regression tests for exporting most of the blend files
in the io_tests/blend_geometry and io_tests/blend_scene tests.
A fix was necessary in the BlendfileLoadingBaseTest class to prevent
leakage of some global data generated when a loaded file has metaballs.
Also, had to fix the exporter to deal with empty curves.