Blender Git Loki

Geometry Nodes: connect group input and output by default

Geometry Nodes: improve node tree evaluation

This change reduces the number of unnecessary copies of data
and avoids computing the same value more than once.

Merge branch 'master' into soc-2020-io-performance

Geometry Nodes: initial Transform node

Most of this code has been written by @HooglyBoogly.
I just changed the exec funtion so that it does not have to make
a copy of the mesh.

Geometry Nodes: add utility method to check if a geometry has a mesh

Merge branch 'master' into geometry-nodes

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

Merge branch 'master' into cycles_procedural_api

fix up ConvertNode before merge

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