Blender Git Loki

More fixes for dyntopo undo and vertices (face data still isn't
implemented).

Added initial support for customdata to dyntopo undo (BMLog).

TODO:
- Handle face (loop) data
- Figure out what to do about edge data (warn user? actually handle
it?)
- Handle sculpt color undo push nodes properly (shouldn't be hard).

PBVH drawing now properly names attributes.

NOTE: I've added a new function, DRW_make_cdlayer_attr_aliases, for
this. It's patterned after extract_uvs. The appropriate devs from the
draw engine team should take a look.

Fixed SCULPT_dynamic_topology_sync_layers from last commit.

Got sculpt colors to work, needs more testing

pre-valgrind commit

Fixed broken customdata interpolation in dyntopo collapse.
Also added support for uvs to dyntopo gpu buffer building code.

Added support for customdata interpolation to dyntopo.
It seems fast enough for simple cases, I make no promises that it
will be fast in crazy cases lots if there's lots of vgroup layers.

Note I still need to interface properly with the sculpt colors code.

Fix bugs in last commit.

Refactored sculpt code to use a new type, SculptVertRef, that replaces
much of the usage of integer indices. Meshes and grids simply store the
index here, but bmesh stores a pointer to a BMVert. This greatly speeds
up DynTopo by reducing the need to maintain flat pointer arrays in bmesh.

To prevent the accidental casting of ScuptVertexRef to indices and vice
versa SculptVertRef is defined as a struct:

typedef struct {intptr_t i} SculptVertRef;

There are also two functions to convert flat index indices to
SculptVertRefs and back:

ScultpVertRef BKE_pbvh_table_index_to_vertex(PBVH *pbvh, int index);
int BKE_pbvh_vertex_index_to_table(PBVH *pbvh, SculptVertRef *ref);

Note that these functions require the aforementioned maintanance of
flat pointer arrays in bmesh, so make sure to call
SCULPT_ensure_vertex_random_access().

Merge performance improvements from trimesh branch into this one.

Submodule update

Merge remote-tracking branch 'origin' into temp_bmesh_multires

commit before merge

* Improved multires projection some more in bmesh_interp.c

COde cleanup

New branch to fix multires topology editing. WIP

Changes:
* Brought back bmesh_mdisps_space_set, written from scratch using
subdiv api, not ccg.
* Wrote a function to smooth multigres grids from within bmesh. I might
not need it; unless anyone thinks of a use for it I'll go ahead and
delete it.

Todo:
* Purge code of all usages of CCG for multires.

This commit:
* Wrote a utility function to dump multires displacements into a (new)
scene object.
* Consequently, I now know that the CCG_based multires code is not
compatible with the OpenSubdiv based code. The former produces gaps
between grids when converting displacements to object space.

commit multires patch