Blender Git Loki

Merge branch 'master' into tracking_tools

Fix incorrect merge: missing function `DRW_view_get_active`.

Sculpt: added parameter to options panel
to control smooth projection
(volume preservation) for shift-smooth

Sculpt: fix shift-smooth strength option

Finally fixed the last of what turned out
to be many bugs that were causing it
to be ignored.

Remove debugging ATTR_NO_OPTS

Sculpt: face set extrude now kinda works

Face set extrude now mostly works, thought it's
still buggy and unstable in DynTopo mode.

Interfacing PBVH_BMESH with the BMOp API
turned out to have a few nasty gotchas; the last commit
fixed a lot of things but some rethinking of the basic
design still needs to happen.

Sculpt: Minor bmesh refactor, made tool flags a CD layer

The way toolflags reallocated the entire mesh
just to add or remove one pointer from BMEdge/Vert/Face
was highly broken. Now a CD layer is used instead.

Commit working code.

Merge branch 'master' into xr-controller-support

Fix controller model loading for no stb image

Cleanup

- Use doxygen style comments
- Improve comment for XR region type
- Improve RNA descriptions for XR nav location/rotation/scale
- Split controller draw callback into separate model and aim functions

Merge branch 'master' into sculpt-dev

Sculpt: experimental brush palette ui

Pure python, experimental.

Merge branch 'master' into soc-2021-uv-edge-select-support

Merge branch 'master' into soc-2021-porting-modifiers-to-nodes-merge-by-distance

# Conflicts:
# source/blender/blenkernel/BKE_node.h

Mixing attributes when merging PointClouds.

working stage

Merge branch 'master' into asset-greasepencil

Sculpt: fixed dyntopo speed issue

* PBVH_UpdateTopology is now properly cleared in all cases.
* BKE_curvemapping_cache.h no longer provides a global curve
cache, the brush system now allocates its own on startup.

Fix compile error