Blender Git Loki

- fix for error in ndof patch.
- ColorBalanceModifierData wasn't aligned on 32bit systems.
- BM_vert_find_first_loop() was missing NULL check.

Merging r50016 through r50021 from trunk into soc-2011-tomato

Sequencer: per-sequence modifier stack for color grading

This implements basic color grading modifiers in sequencer, supporting
color balance, RGB curves and HUE corrections.

Implementation is close to object modifiers, some details are there:

http://wiki.blender.org/index.php/User:Nazg-gul/SequencerModifiers

Modifiers supports multi-threaded calculation, masks and instant
parameter changes.

Also added cache for pre-processed image buffers for current frame,
so changing sequence properties does not require rendering of original
sequence (like rendering scene, loading file from disk and so)

spelling cleanup: spelling corrections from user zeffii on IRC.

Merging r49953 through r50015 into from trunk into soc-2011-tomato

Patch #32326: NDOF support of rotation and panning the view at the same time

Additional changes:
- Option to the ndof menu letting you pick turntable/trackball independently
of the mouse viewport navigation style
- Option to change the rotation sensitivity separate from the panning

Holding shift + moving the ndof does just as before locking it to panning
Holding ctrl + moving will lock it to only rotation

Patch by Fredrik Hansson, thanks!

Reviewed by self and Mike Erwin.

Tomato Cycles: fix for reading freed memory

Incorrect read was happening after nodes which are not affect on output
were removed from the graph. Other nodes could have been connected to
this nodes which lead to accessing freed memory in some other places.

Solved by removing links from unused nodes before removing them from
the graph.

style cleanup

use BLI math length functions for distance compositor operations.

The Distance Node in 2.49/2.5/2.6 pre-tiles has a different calculation for RGB and YCC. While RGB
calculate the distance in 3d between R,G and B, the YCC only takes Cb and Cr
into consideration.

This commit makes COM_DistanceMatteOperation inheritable and expose the calculate distance function
to be re-implemented for the YCC node operation.

Thanks Troy Sobotka for the report over email.
Patch incorporates review suggestions by Jeroen Bakker.

Fix for [#32361] "Blenderplayer quad-buffer maximum 100Hz Fps" reported by HG1.

Allowing the Blenderplayer to break 100fps by making it less dependent on Ghost's messages.

re-enable metaball orientation for manipulator and view axis setting (was disabled since 2.4x)

fix for own commit r49991, this exposed bad logic in rect copy function.

Fix simple subsurf on wire edges

Subsurf on wire edges gave smooth results even if set to simple
subdiv. Added a field to the CCG meshIFC to flag simple subdivision,
then when syncing vertices simply skip moving vertices if in
simple-subdiv mode.

This change affects two places, the level-1 build in sync and the
subdivision up to other levels.

Fixes bug [#32268] Simple Subsurf Modifier gives unexpected results on
edges without faces
projects.blender.org/tracker/index.php?func=detail&aid=32268&group_id=9&atid=498

code cleanup: use BLI math funcs for metaballs, also remove MB_POINT struct and just use float[3] instead.

Fix incorrect error test when removing a modifier

r49989 had the test reversed

Fix reversed names in modifier-remove error report

code cleanup: use BLI rect functions for interface button and block code.

use rctf struct for UI buttons and blocks, easier to read and means we can use BLI_rctf functions.

utility functions: BLI_findptr, BLI_rfindptr --- use for finding an item in a linked list by a pointer.