Blender Git Loki

style cleanup: comment blocks

DO not increment image user counter on view3d duplicate and not decrement
it's user count on free. That's how other spaces handles ID block (like
image editor, space clip).

This fixes issue when loading file without loading UI when current layout
has got background images set.
Also this hopefully will fix issue #30429: Background Images Lost on Save/Close/Reload

Previous fix for stabilization autoscale actually broke stabilizaiton itself
(median point was sliding a bit from it's original position)

This happens because of how transformation for stabilization calculates:
image is scaling around it's center, so image translation should be recalculated
after scale was changed, but scale also depends on translation. That's where
tricky things happens. It's still not ideal for case of rotation, but before
fixing this issue better to figure out usecase and see if it's indeed
so needed to scale around image center (it might only be helpful to use
stabilization parameters in compositor nodes).

Markers Tweak for Sequencer

Applied the keymaps hack which is used for other animation editors to allow
markers to be added and renamed anywhere from within the sequencer strips
region, instead of just when the cursor is over the scrollbar.

Other operations where the hotkeys conflict though (delete, move) can still be
done only from the scrollbar, or better still, from the Timeline.

Tweaks for typos in the Keying Set descriptions commit

Node socket selection feature reimplemented from 2.49. Sockets can be selected as a sub-selection of nodes and are then preferred by the auto-connect operator. This makes it easier to create precise links over long distances as an alternative to the click & hold operator.
Socket selection is indicated by a simple white highlight circle.

Multiple inputs can be selected by holding SHIFTKEY (just like regular node select). Only one output socket can be selected at a time for each node, but several outputs in different nodes are allowed.

The auto-connect operator will prefer selected sockets on nodes for creating links. If either the output or input side have no selected sockets it will fall back to the previous behavior of chosing 'best' sockets first (colors, then vectors, then values). This could be improved in the future, but is out of scope here.

Some fixes for 2D stabilization:
- Ron aspect ratio correction after applying location
There're still some annoynments with rotation stabilization with
pixel aspect != 1, will be fixed later.
- Joining tracks will update track used for rotation stabilization/

Optimize index buffers for multires drawing in sculpt mode.

All multires grids have exactly the same ordering, so rather than
allocate a new index buffer for each PBVH node, just allocate one that
can be reused for every grid.

This requires more draw calls (one per grid rather than one per PBVH
node), but less graphics memory.

code cleanup: replace macros VECCOPY, VECADD, VECSUB, INPR - with BLI_math funcs.

added copy float/double funcs: copy_v3fl_v3db(), copy_v3db_v3fl(). 2d & 4d too.

some code cleanup for rip tool.

BMesh: rewrite edge split code (used by edge split modifier and rip tool)
this fixes but [#30461] where the same vertex was added to some faces twice.

Previous code rebuilt all faces around the split edges, replace this with much simpler code that uses existing bmesh API for splitting.

This also gives a performance boost to the modifier (over 30x faster in the bug-report file).

style cleanup: spelling.

also remove large, duplicate comments from sunsky.h

added API function to C and python

* C: BM_vert_separate(...)
* py: bmesh.utils.vert_separate(vert, edges)

This splits off regions around the vertex, splitting on connected edges passed in a sequence.

also made minor changes
- rename python api functions _rip to _separate
- fixed bmesh iterator being iterable its self (some parts of python expect this)
- fix memory leak in bmesh python api.

Use sqrtf rather than sqrt in CCGSubSurf.c

- MSVC doesn't have log2f function
- Fix misusage of new [] and delete in BGE.

Cycles: improve F/Stop number tooltip description.

bmesh py api, new functions:
* bmesh.utils.face_vert_rip(f, v)
* bmesh.utils.loop_rip(l)

Cycles: fix UI when material has nodes but use nodes option is disabled, it
didn't show this option then.

Cycles: support for environment texture "Mirror Ball" projection mode, next to
existing "Equirectangular". This projection is useful to create light probes
from a chrome ball placed in a real scene. It expects as input a photograph of
the chrome ball, cropped so the ball just fits inside the image boundaries.

Example setup with panorama camera and mixing two (poor quality) photographs
from different viewpoints to avoid stretching and hide the photographer:
http://www.pasteall.org/pic/28036

Fix #30435: 2.62 Torus Batch building "Bug" or A Experimental Feature?

Python-defined primitives used to be added to all visible layers instead of
adding to active scene layer as it happens with C-defined primitives.