Blender Git Loki

Code cleanup: get rid of unneeded thread count in statistics structure

Added check for whether thread lock is being removed while thread is using guarded alloc.

Use one global task scheduler for all the tasks

Instead of allocating scheduler and starting threads
on every object_update call make it so scheduler is
global and threads are always ready to run.

This was we could avoid quite hacky thing which is
counting how much objects need to be updated before
starting threaded update.

It'll also allow using the same scheduler to do all
sorts of tasks, not only objects update in the same
scheduler. This is nice from load balancing point of
view.

Couple of changes were needed to be done in task
scheduler itself:

- Free tas before sending notifier.
- Free TaskThread structures outside from thread.

This is needed to make it possible use begin/end
threaded malloc from the main thread before/after
running the pool. Without this change it was possible
that allocation will switch to non-thread mode while
thread is freeing the task.

This required storing TaskThread array in Scheduler,
but it's not so much bad actually, since it also
reduces memory overhead caused by per-thread allocation.

Optimization and threading fix for shapekeys weights calculation

This commit fixes two different issues, which were caused by
how weights are being calculated for relative shapekeys.

Weights for key block used to saved in KeyBlock DNA structure,
which lead to situations when different objects could start
writing to the same weights array if they're sharing the same
key datablock.

Solved this in a way so weights are never stored in KeyBlock
and being passed to shapekeys routines as an array of pointers.
This way weights are still computed run-time (meaning they're
calculated before shapekey evaluation and freed afterwards).

This required some changes to GameEngine as well, to make it
never cache weights in the key blocks.

Another aspect of this commit makes it so weight for a given
vertex group is only computed once. So if multiple key blocks
are using the same influence vertex group, they'll share the
same exact weights array. This gave around 1.7x speedup in
test chinchilla file which is close enough to if we've been
caching weights permanently in DNA (test machine is dual-code
4 threads laptop).

Some further speed is optimization possible, but it could be
done later as well.

Thanks Brecht for idea of how the things might be solved in
really clear way.

Merged revision(s) 58779, 58783-58784 from trunk/blender into soc-2013-dingto.

Code cleanup, use bools here. Forgot to change that.

remove unused headers and NULL check

Cycles / HSV Separator and Combine node:
* Added nodes to separate and combine hsv colors.

Part of my GSoC 2013 project, SVN merge of r57981.

Cycles / Vector Transform node:
* Add a note to convert a Vector, Point or Normal between World <=> Camera <=> Object coordinate space.

Documentation: http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Vector_Transform

Part of my GSoC 2013 project, SVN merge of r57599, r57670, r57918, r57919, r58245 and r58775.

Cycles / Blackbody to RGB node:
* Added a node to convert a temperature in Kelvin to an RGB color. This can be used e.g. for lights, to easily find the right color temperature.
= Some common temperatures =
Candle light: 1500 Kelvin
Sunset/Sunrise: 1850 Kelvin
Studio lamps: 3200 Kelvin
Horizon daylight: 5000 Kelvin

Documentation: http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Blackbody

Thanks to Philipp Oeser (lichtwerk), who essentially contributed to this with a patch! :)

This is part of my GSoC 2013 project. SVN merge of r57424, r57487, r57507, r57525, r58253 and r58774

fix for BLI_ghash_clear from Sv. Lockal (lockal)

Merging r58756 through r58777 from trunk into soc-2013-depsgraph_mt

Cycles / Ray Depth:
* Added a Ray Depth output to the Light Path node, which gives the user access to the current bounce.
This can be used to limit the maximum ray bounce on a per shader basis. Another use case is to restrict light influence with this, to have a lamp only contribute to the direct lighting.

http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Light_Path

This is part of my GSoC 2013 project. SVN merge of r58091 and r58772 from soc-2013-dingto.

Cycles / Vector Transform node:
* Code cleanup to avoid duplicated enum code.
* Added a third type for conversion next to Point and Vector: Normal. This is basically the same result as with the Vector type, but normalizes the vector at the end.

Thanks to Brecht for code review!

Cycles / Blackbody Node:
* Some optimizations to avoid divisions on runtime, avoid possible division by zero and code cleanup.

Thanks to Brecht for code review!

Cycles / Non-Progressive integrator:
* Code cleanup, to avoid separate code for CPU and GPU.

Cycles / Ray Depth:
* Fix some things which came up in code review. Includes some fixes for background lights and changes to variables, to avoid some castings.

Thanks to Brecht for code review! :)

Merged revision(s) 58682-58770 from trunk/blender into soc-2013-dingto.

Code cleanup: libmv C API

Clean up inconsistencies in the libmv C API:
- All type identifiers are libmv_TypeName
- All function identifiers libmv_functionName
- Prefer libmv_nounVerb function names (e.g. libmv_featuresDestroy)
- Match Blender code formatting rather than Google
- Spelling corrections

Code review: https://codereview.appspot.com/11494044/

Fix #36267 part 2 of 2: Fix for reroute node values in old shader node stack system. They were overwriting stack values from their input nodes, because the system would not detect that these sockets
actually just point to existing defined stack values. To make the link check work, set the socket->link pointer if internal node connections exist, this works for both muted and reroute nodes.