Blender Git Loki

Cycles: Code cleanup -- use bitshifts instead of hardcoded constants

This way it's easier to extend bitfields and see when we start running
out of free bits.

Plus added brief description of what SD_VOLUME_CUBIC flag means.

Cycles: Get rid of hardcoded enum values in the code

Still need to keep enum definition in sync with the python code,
but the code itself is a bit more clear to understand now.

Cycles: Expose volume voxel data interpolation to the interface

It is per-material setting which could be found under the Volume settings
in the material and world context buttons.

There could still be some code-wise improvements, like using variable-size
macro for interp3d instead of having interp3d_ex to which you can pass the
interpolation method.

Cycles: Implement tricubic b-spline interpolation for CPU texture_image

This is the first step towards supporting cubic interpolation for voxel
data (such as smoke and fire). It is not epxosed to the interface at all
yet, this is to be done soon after this change.

Meshdeform: Use SSE intrinsics in meshdeform_dynamic_bind()

Quite straightforward change, don't think some extra explanation is needed.

This gives about 15% speedup of the modifier evaluation on my laptop.

Reviewers: campbellbarton

Differential Revision: https://developer.blender.org/D836

Meshdeform modifier: Use threaded evaluation

This commit switches meshdeform modifier to use threads to evaluate
the vertices positions using the central task scheduler.

SO now we've got an utility function to help splitting the for loop
into tasks using BLI_task module which is pretty straightforward to
use: it gets range (which is an integer lower and higher bounds) and
the function and userdata to be invoked for each of the iterations.

The only weak point for now is the passing the data to the callback,
this isn't so trivial to improve in pure C.

Reviewers: campbellbarton

Differential Revision: https://developer.blender.org/D838

OSX: fix T42325 by not letting .vob handled by qt, avoids a doublefree

Cleanup: avoid loop-in-loop when mirror isn't used

Also name 'children' is normally used for a list

Fix T42334: x-mirror fails in armature with a partially mirrored chain.

When resetting edit bones on cancel, they also have to reset connected
parent and child bone tips and heads respectively, since these can be
modified during the transform.

Cleanup: style

Linux/scons: fix compile, BF_BOOST_LIB_STATIC string was miising a space

Fix T42260: By repeatedly joining meshes, you could end up with thousands of UVLayers

This is only an indirect fix, in fact: this commit adds a public API to check
the maximum number of a given layer type (`CustomData_layertype_layers_max()`),
and uses it to forbid too much layer creation in `CustomData_merge()`.

This only affects UVs/VCol data though, but merge behavior in itself is not a bug
actually, how user managed to get thousands of different UV layer names remain
rather mysterious...

Fix T42278: Grease Pencil in Movie Clip Editor can not be erased in Track > Cursor mode

Eraser was not aware of possible transform matrix for the strokes.

Fix T42324: Curve deform modifier from mesh edge doesnt work properly

Curve parent requires valid path to exist for curve. If the path is disabled in
the curve settings, displist evaluation will check the dependency graph whether
the path is needed for parenting.

The issue was that changing relations in the scene chagned need of the curve path
but nothing tagged the curve to update it's path.

For now use direct call of DAG_id_tag_update from set_parent(). In the bright
future we might detect such a need in flush automatically in the depsgraph.

Simplify GLSL in bump mapping, use gl_NormalMatrix where appropriate.
tangents are directions and should be transformed like directions.

Fix T42257: Curve vertex parent not working with animation

Vertex parent was using original non-modified nurbs list, simply because
it didn't have something else to operate with.

Now we've got deformed by pre-tessellation modifiers nurbs in the curve
cache which might be used y the vertex parent.

Fix T42178: Cycles Film Exposure not triggering Viewport update

ListBase: use BLI_listbase_ for new api calls

Fix tgz script, addons_contrib was in release

ShapeKeys: rework 'move skey' code, and add options to move to first/last position.

Main moving logic is moved to new `BKE_keyblock_move()`, which makes it available from anywhere.
In addition, move code was reworked so that it only loops once on whole keyblocks list,
and it accepts arbitrary org and dest indices, not only neighbor ones.

Partly based on work by revzin (Grigory Revzin) in his soc-2014-shapekey GSoC branch, thanks!