Blender Git Loki

Merge remote-tracking branch 'origin/master' into experimental-build

Use new motionpath flag exlusively to draw motionpaths for objects

fix: rewrote clustering so it operates on the mesh islands now prior to constraint generation, instead of operating on shards only during fracture time

Don't draw motion paths for armatures in edit mode. Results in nice
crashes

Merge branch 'master' into alembic_pointcache

Hjalti's Motion Path commit series no 2.

Draw motionpaths after scene. They are not really XRays since they don't
require any depth info so add separate list for them. Feature could be a
little more polished to avoid too many state changes but for now just
commit something that works (tm)

Merge branch 'master' into gooseberry

Hjalti's Motion Path commit series no 1.

Introduce global flag to draw motion paths. Always. Even in render only
mode :)

Removed unused DNA field.

Use the cache library to construct cache file paths instead of the
relative point cache paths.

Projective painting: Only dither if factor is more than zero

Fix T43735 painting on perpendicular to the screen polygons is
problematic (still!)

It seems due to floating point precision issues we have to account for
even more cases.

Added colinear check for one more triangle edge-vertex and assumed that
if no collision test is found then triangle is completely inside box.

Such cases are mostly from float precision not catching triangle just
outside bucket. Now tests are much better for simple tests (paint/flood
fill cube from ortho view, paint sphere), however there are still some
rare cases of stray pixels.

Merge branch 'master' into asset-experiments

Use `cache` as a relative folder path for storing caches by default.

Display UI for cache library inside the point cache UI.

`New` operator for adding cache libraries.

Merge branch 'master' into gooseberry

Use a cache library pointer in point caches to replace the per-object
path construction.

Fix for cache panel display: the `is_baked` flag has been removed and
should not be used to disable cache UI any longer.

New ID datablock 'CacheLibrary', for managing physical cache archives
and files.

At it's core this is just a file path, but many different cache users
may refer to this, so having a dedicated ID block helps. It can be
compared to Image datablocks, which also primarily are used for data
on storage, but can be packed with the blend file, and carry some
additional information that would be cumbersome to keep sync'ed
otherwise.

The name 'CacheLibrary' deliberately resembles the 'Library' datablock:
just as a Library stores ID blocks in a physical file, a CacheLibrary
stores cached data (in Alembic HDF5/Ogawa or other formats).