Blender Git Loki

GP: Redesign drawing cache to support particles

Full redesign of the cache system used for drawing strokes and handle derived frame data.

Before, the cache was saved in bGPdata and a hash was used to manage several objects with the same datablock.

Old design made the use of particles very inefficient and prone to bugs and segment faults, and especially when this was mixed with onion skinning and multiple objects using same datablock. Also, there were some conflicts with the depsgrah logic (the old design was done before despgraph was in place) that made the use of hash not working.

The new design saves the data in the object runtime struct and avoid the use of any hash to find the right data. This improves the speed and reduce a lot the complexity of the code, memory allocation, hash overload and adds full support for particles and reused datablocks.

The particles can reuse the modifiers and shader effects of the original grease pencil object.

Merge branch 'blender2.8' into greasepencil-object

Made opti edge flip use actual face normals and fiddled a bit with cusps again

Fix FB split uv bug and treat cusps more like in the paper

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

# Conflicts:
# source/blender/makesrna/intern/rna_scene.c

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

# Conflicts:
# release/scripts/addons

Fix interface lock situation reported by DarkDefender.

DPIX normal controlled line width

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

# Conflicts:
# release/scripts/addons

Vertical line hack: tip point threshod fix and a condition branch.

Merge branch 'blender2.8' into greasepencil-object

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

# Conflicts:
# release/scripts/addons_contrib
# release/scripts/startup/bl_ui/properties_physics_cloth.py
# source/tools

Possibly fixed shader errors, but don't know exactly what caused it.

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

# Conflicts:
# source/tools

Increased the amount of faces the inco check will search

Fix memleak when creating eval

Remove opti vert dissolve

Merge branch 'blender2.8' into greasepencil-object

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

# Conflicts:
# source/blender/draw/CMakeLists.txt
# source/blender/makesrna/intern/rna_scene.c

Fixed still frame render cache out of date error.