Blender Git Loki

Arrow widget interaction:

Fix interaction when pivot is beside the camera. basically we now do all
calculations in 3D space and we do not scale correct the offset in 3D -
this creates a nasty dependency loop between drawing and calculation for
widgets bound to properties - ie offset depends on scale but scale
depends on screen position - ie offset.

Also added an extra callback to get the final position of the widget in
3d space and use that to calculate the scale. This takes care of
bringing a close to the camera widget to the background and the widget
keeping its initial size. The final position can be different from the
initial position, especially when the widget is offset from the original
position.

Merge branch 'viewport_experiments' into gooseberry

Merge branch 'master' into viewport_experiments

Merge branch 'master' into viewport_experiments

Conflicts:
source/blender/gpu/intern/gpu_extensions.c

More info for widget undo push string

Add widget for focus of camera. There are some general issues with
widget scale that I'll fix later.

Merge branch 'master' into wiggly-widgets

Conflicts:
source/blender/editors/transform/transform_manipulator.c

Add flag so offset is applied in world, not screen space.

Fixed overlooked function name change in game engine code.

Merge branch 'gooseberry' into hair_immediate_fixes

Merge branch 'master' into gooseberry

Conflicts:
source/blender/blenkernel/BKE_key.h
source/blender/editors/transform/transform_manipulator.c

Fix for particle instance modifier: use a stable parallel-transport
framing method instead of the Frenet frame.

The Frenet frame is very succeptible to sudden twists along straight
sections of a curve where the second derivative (curvature) becomes 0.

Use better algorithm for arrow widget back transform.

We now use plane/line intersection which seems to work quite well and
agrees to great extent with the transform system as well. There still
some small discrepancy but may also be related to scaling.

WIP cage transform.

This also includes code for the node editor but probably
will try a different use case first.

Nicer hashing functionality for sim debugging using a variadic macro
to support multiple hash identifiers.

Using explicit hashing functions for every sim debug call defeats the
purpose of having a quick feedback system. Now this can be done simply
by passing an arbitrary number of hash inputs (integers) at the end of
the function calls, which are then combined by a system of variadic
macros (based on the ELEM feature). Up to 8 identifiers are supported
currently, but more could be added easily if needed.

Merge branch 'master' into gooseberry

Merge branch 'hair_immediate_fixes' into gooseberry

Conflicts:
release/scripts/startup/bl_ui/properties_particle.py
source/blender/editors/physics/particle_edit.c
source/blender/makesdna/DNA_modifier_types.h
source/blender/physics/intern/BPH_mass_spring.cpp
source/blender/physics/intern/hair_volume.cpp
source/blender/physics/intern/implicit.h
source/blender/physics/intern/implicit_blender.c
source/blender/physics/intern/implicit_eigen.cpp

Merge branch 'master' into hair_immediate_fixes

Conflicts:
source/blender/blenkernel/intern/implicit.c

Merge branch 'master' into gooseberry

Some tweaking of value ranges for hair target density and removed
density factor (already included in grid velocity).