Blender Git Loki

Code Cleanup: Deduplicate undo node freeing code

Fix: GPencil drawing sessions now respect limits for maximum undo steps

When drawing with Grease Pencil "continous drawing" for a long time
(i.e. basically, drawing a very large number of strokes), it could be
possible to cause lower-specced machines to run out of RAM and start
swapping. This was because there was no limit on the number of undo
states that the GP undo code was storing; since the undo states grow
exponentially on each stroke (i.e. each stroke results in another undo
state which contains all the existing strokes AND the newest stroke), this
could cause issues when taken to the extreme.

Blender 2.78 release: Update addons hash once again

CMake: decouple WITH_CYCLES_OPENSUBDIV from WITH_OPENSUBDIV, and enable on OS X.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D2227

Fix two issues related to 'partial' .blend files:

I) Filename was not put in temp Main generated to save selected data only,
this was breaking readcode when trying to open partial file, leading to missing
filename in final loaded Main data.

II) Read code would confuse partial .blend files with Undo ones, when they had no screen in them
(which happens to 99.999% of partial .blend files I guess).

Reported by @sybren, thanks.

Should be safe enough for 2.78 release.

Fix compilation error: Shadowing of variable

2.78 release: Update splash screen label

2.78 release: Update hash for addons submodule

Fix T35333: Update some WM/UI API functions docstrings.

Based on patch by @codemanx, but with slightly less verbose descriptions.

More detailed behavior etc. rather belongs to doc/python_api/examples/bpy.ops.x.py imho.

Fix bpy.data.user_map() ignoring unused datablocks.

Should be backported to 2.78.
Found by Sybren here in studio, thanks!

Outliner: Report linked datablock edit failure when trying to rename linked data in outliner

Fix T49323: Ineffective bone roll calculation with low rig scale

The code was expecting vector to be normalized, however after
applying inverted object matrix it was possible to have scale
applied to it.

Fix T49336: Outliner allows to edit restrict flags for linked objects

Fix T49290: Specific .blend with hair crashes in MacOS 2.78 RC1 on render

The issue was caused by some false-positive empty non-AABB intersection.
Tried to tweak it a bit so it does not record intersection anymore.

Hopefully will work for all platforms. Tested here on iMac and Debian.

Fix T49327: Cycles OSL Mode: RGB Curves node only outputs gray scale images

To be backported to 2.78 release.

Fix T49296, assert failure in Bevel code.

The mesh interpolation function failed to fill a fractions-of-the-way
array properly when the distances are very small but nonzero.

Cycles: Fix wrong SSS in combination with hair on AVX2 platform

Not sure why exactly that happened, need a closer look.

Cycles: Fix shading and crashes resulting from constant folding on displacement

Constant folding was removing all nodes connected to the displacement output
if they evaluated to a constant, causing there to be no valid graph for
displacement even when there was displacement to be applied, and sometimes
caused crashes.

Cycles: Replace object index hack with actual checks for SD_TRANSFORM_APPLIED

Using ones complement for detecting if transform has been applied was confusing
and led to several bugs. With this proper checks are made.

Also added a few transforms where they were missing, mostly affecting baking
and displacement when `P` is used in the shader (previously `P` was in the
wrong space for these shaders)

Also removed `TIME_INVALID` as this may have resulted in incorrect
transforms in some cases.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D2192

[CMAKE/Platform/Windows] Only perform version check if the actual compiler is MSVC