Blender Git Loki

Smoke: put density/color in separate textrues, fixes for workbench shader

This is more in line with standard grids and means we don't have to make as
many special exceptions in the shading code.

The workbench shader was also changed to fix bugs where squared density was
used, and the smoke color would affect the density.

Volumes: better integration into workbench drawing

* Respect workbench object/material/single/random color
* Add viewport display panel, with density scale setting
* Memory usage: half float and only needed channels for OpenGL textures
* Various bugfixes

Merge branch 'master' into new-object-types

GPencil: Add new Blend parameter to Glow effect

Still pending the implementation. This commit only adds the parameter in the UI.

GPencil: New Glow rotation parameter

Similar to Blur rotate parameter.

initial MultiFunctionID

remove operation hash of functions, a more reliable system is necessary

GPencil: Cleanup function using SWAP macro

GPencil: Set collision box aligned to axis

If the box was not aligned, the detection fails.

GPencil: Add RNA properties for stroke bound box

GPencil: Cleanup unused code

GPencil: Remove old parameters from presets templates

GPencil: Cleanup formating issue

GPencil: Remove unused define

Merge branch 'master' into greasepencil-object

Conflicts:
source/blender/draw/engines/gpencil/gpencil_engine.h
source/blender/draw/engines/overlay/overlay_extra.c

GPencil: Disable VFXs in Solid mode

The VFX must be visible in Material or Render shading mode only.

Support inputting custom base pose location and Z-Axis rotation

Refactor reference pose setup, always sync with actual camera pose

Only use Z-axis rotation for base pose (grid aligned)

GPencil: Change default z-depth offset to 0.150