Blender Git Loki

Geometry Nodes: add Attribute Mix node

This node can be used to mix two attributes in various ways.
The blend modes are the same as in the MixRGB shader node.

Differential Revision: https://developer.blender.org/D9737

Ref T82374.

Cleanup: remove some forward declared enums

Forward declaring enums are not allowed in C++.

Differential Revision: https://developer.blender.org/D9811

Small fixup

Fix wrong operator return values in Outliner code.

Mistakes in rBac8b641b77e0 and rBf254f66587f2.

Spotted while inverstigating T83592.

GeometryNodes: Make properties exposed in modifier overridable.

Cleanup: Fix typo in comment.

Copy Transforms: implement Invert, Fix Shear and more Mix options.

This constraint can be naturally viewed as a prototype for a future
4x4 matrix math node (or subset thereof), since its basic semantics
already is matrix assignment. Thus it makes sense to add math options
to this constraint to increase flexibility in the meantime.

This patch adds support for several operations that would be useful:

- An option to fix shear in the incoming target matrix.
- An option to invert the target matrix.
- More ways to combine target and owner matrix.

Shear is known to cause issues for various mathematical operations,
so an option to remove it at key points is useful. In the future node
system this would be a separate operation, but due to the limits of
the constraint stack it has to be built in for now.

Inverting a matrix is also an operation that can be useful to have.
For some uses it may be useful to invert components separately, so
implement this by checking the Mix mode setting to avoid UI options.

Finally, add two more ways to combine the matrices (multiplied by
two due to the necessity for the Before/After choice). Now there
are three combine modes:

Full implements regular matrix multiplication as the most basic option.

Split Channels combines location, rotation and scale separately.
Looking at D7547 there is demand for such a mode in some cases,
and even with nodes it's cumbersome to rig manually every time.

Finally, Aligned emulates the 'anti-shear' Aligned Inherit Scale mode,
and basically uses Full for location, and Split for rotation/scale.

Differential Revision: https://developer.blender.org/D9469

Limit Rotation: add an Euler Order option and orthogonalize the matrix.

Since Limit Rotation is based on Euler decomposition, it should allow
specifying the order to use for the same reasons as Copy Rotation does,
namely, if the bone uses Quaternion rotation for its animation channels,
there is no way to choose the order for the constraint.

In addition, add a call to orthogonalize the matrix before processing
for the same reasons as D8915, and an early exit in case no limits are
enabled for a bit of extra efficiency.

Since the constraint goes through Euler decomposition, it would remove
shear even before the change, but the rotation won't make much sense.

Differential Revision: https://developer.blender.org/D9626

Constraints: add support for a new Owner Local Space for targets.

Add a new transformation space choice for bone constraints, which
represent the local transformation of the bone in the constraint
owner's local space.

The use case for this is transferring the local (i.e. excluding the
effect of parents) transformation of one bone to another one, while
ignoring the difference between their rest pose orientations.

Owner Local Space replaces the following setup:

* A `child` bone of the `target`, rotated the same as `owner` in rest pose.
* A `sibling` bone of the `target`, positioned same as `child` in rest
pose and using Copy Transforms in World Space from `child`.
* The `owner` bone constraint uses Local Space of `sibling`.

(This analogy applies provided both bones use Local Location)

Since the space list is getting long, this adds a couple of separators.

Differential Revision: https://developer.blender.org/D9493

Constraints: refactor the D7437 patch adding Custom Space for constraints.

As mentioned in the comments to that patch, I had an idea for
a different way to do some technical aspects, but it was too
complicated to force changes in the original patch. Thus I submit
this follow up patch.

First, instead of modifying all the get_constraint_targets and
flush_constraint_targets callbacks, introduce wrapper functions
for accessing constraint targets, convert all code to use them,
and handle the new reference there uniformly for all constraints.

This incidentally revealed a place in the Collada exporter that
didn't clean up after retrieving the targets.

Also, tag the special target with a flag so other code can
handle it appropriately where necessary. This for instance
allows dependency graph to know that the Use B-Bone Shape
option doesn't affect this specific target.

Finally, rename and simplify the function for initializing the
custom space, and make sure it is called everywhere necessary.

Differential Revision: https://developer.blender.org/D9732

Correct the order of the last two arguments in `eevee_cryptomatte_shading_group_create`

When compiling on Windows, the following warnings occur:
```[3468/4560] Building C object sourceblenderdrawCMakeFilesbf_draw.direngineseeveeeevee_cryptomatte.c.obj
C:blender-gitblendersourceblenderdrawengineseeveeeevee_cryptomatte.c(306): warning C4047: 'function': 'bool' differs in levels of indirection from 'void *'
C:blender-gitblendersourceblenderdrawengineseeveeeevee_cryptomatte.c(306): warning C4024: 'eevee_cryptomatte_shading_group_create': different types for formal and actual parameter 5```

As @Severin pointed out [here](https://developer.blender.org/rB76a0b322e4d3244e59a154c8255b84a4fbc33117#288960), this is due to the last two arguments being flipped. This diff corrects the order.

Reviewed By: Severin, fclem

Differential Revision: https://developer.blender.org/D9809

Use new UI data system for nodes modifier

Mainly finish versioning code

Workaround T83651: Crash dragging multiple buttons in the clip editor

Avoid the crash, dragging multiple buttons still needs fixing.

Cleanup: sort cmake file lists

Cleanup: trailing space

Cleanup: spelling, expand on FCurve.rna_path docstring

UI: Use 'and' Instead of '&' in Descriptions

Use 'and' instead of ampersand in descriptions and comments.

Differential Revision: https://developer.blender.org/D9797

Reviewed by Aaron Carlisle

USD importer: import shapes as empties.

Added support for importing USD shapes (e.g., sphere, cube, etc.)
as Blender empty objects, to allow visual debugging of
transforms. Eventually, this logic will be extended to create
meshes corresponding to the actual shapes.

Updated status (and small cleanup)

The code is working fine until the heap.
[x] Tiling
[x] Weighting
[-] Heap: Implemented but producing a different result than with cyHeap
[ ] Progressive