Blender Git Loki

Fix C++20 designated initializer build issue.

commit prior to small cleanup

* Implemented bounday/face set corner handling.
* New function SCULPT_vertex_is_corner, similar to
SCULPT_vertex_is_boundary it takes argument to
check face sets. PBVH_FACES/GRIDS version is
incomplete. It returns a bitmask of whether
the vert is a boundary corner and/or a face
set one.
* PBVH_BMESH uses a somewhat more expensive
calculation to detect corners of face set islands by
edge angle. This is currently not done for boundary
corners.

Corner pinning now happens in:

* The internal smoother dyntopo uses for stability reasons.
* SCULPT_vertex_neighbor_average_interior.
* Topology rake.
* Dyntopo collapse.

Note that DynTopo always pins face set corners
but everything else only does so if preserve face
sets is on.

Sculpt dyntopo: more smooth stuff

* All of the smooth brushes now use the SculptCustomLayer
system for temporary data, so all work with dyntopo now.
* You can now use a flat array in SculptCustomLayer with
PBVH_BMESH (though you have to build the structure manually).
The mesh filter code uses this.
* Smooth (and autosmooth) now have an option to preserve face
set boundaries. Corners are currently not handled.
* Simplify brush has preserve face set boundaries autosmooth
flag set by default.
* SCULPT_vertex_is_boundary now takes an addition argument
for whether to check for face set boundaries.

Sculpt dyntopo: Smooth improvements and bug fixes

* Added an option to weight smooth by face areas
* Dyntopo now caches face areas in a CD_PROP_FLOAT layer
* Dyntopo also caches number of edges around verts inside of
MDynTopoVert. To avoid increasing the struct size flag was
made a short.
* Cleanup mode (dissolves 3/4-valence verts) now piggybacks on
subdivide code to build list of verts; this is much faster.

Sculpt dyntopo: fix mem cache test function, how did this
ever work

Dyntopo Sculpt: Wrote new edge split code, currently disabled

I hate default int

Silly me, don't use alloca in this situation

Fix compile error on linux

Sculpt dyntopo: Temp fix for nasty GCC compiler bug on linux.

I'll file a bug report with GCC tomorrow.

Sculpt dyntopo: Fix a dumb mistake I made in space_toolsystem_toolbar.py

fix signed/unsigned warning

Sculpt dyntopo: Finished bmesh cache coherency tester

To run, in the python console enter:

bpy.msgbus.pbvh_bmesh_do_cache_test()

The output will be in the regular console. The test
build a half-million vert cube and smooths it. It runs
several passes (all of which perform the same smoothing
operation):

1; Randomized order pass
2. Ordered pass (by vertex clustering)
3. Same as 2 but with a purely data-oriented version
of the bmesh structs.
4. Same as 2, but using a version of the bmesh structs
with all pointers replaced by integer indices.

At least on my laptop #3 and #2 are about a third faster
then #1, and #2 tends to be around 15%.

Sculpt dyntopo: Don't allow dyntopo when multires modfier exists

Note that thoeretically we could support multires in dyntopo,
but numerical instability would probably make the grid data
explode.

Sculpt dyntopo: disable mem cache test executable
from compiling altogether

Dyntopo: Disable mem cache test executable for now as it
doens't link on mac

Sculpt dyntopo:

* Fixed multires apply base feeding bad original coordinates to
deform modifiers.
* Roughed out some code for cache performance testing.
* Wrote skeleton code for a PBVH texel API; hasn't been tested
yet and may be removed.

* BM_mesh_remap can now reorder loops
* Wrote yet another BKE_pbvh_reorder_bmesh function

Sculpt dyntopo: yet another undo bug

BKE_pbvh_bmesh_add_face had a branch where it ignored
the log_face argument, leading to corruption in
BMLog.