Blender Git Loki

Cleanup: compiler warnings

Cleanup: spelling in comments

Asset Browser: Python mixin utility for category-specific panels

Using this mixin for a panel definition, it's possible to set in which
categories the panel should appear. This is used by the Pose Library
add-on.

Fix T88281: Pose Library 'flip pose' sometimes flips wrong

Correct cases where the X-axis of the bone (in pose space) aligns with
the pose-space Y or Z-axis. In these cases the decomposition of the
matrix fails, and a negative scale of the X-axis turns into a 180�
rotation around the Y-axis. An extra -1 scale to the X and Z axes of the
resulting matrix seems to fix things.

Animation/add-ons: Enable the poselib add-on by default

The new Asset Browser-based pose library is partially implemented in an
add-on. This commit enables the add-on by default, as the old pose
library was built-in and thus always enabled.

The ability to disable the add-on is there mostly for cases where
people/studios want to use their own custom pose library.

Cleanup: unused variable capture

Fix failing tests from vertex group name parameter copy

It turns out `BKE_mesh_copy_parameters` can be called while other
tools are running calculations, which meant that it was called at the
same time as `armature_deform_coords_impl`. Beause of that, we
shouldn't do any freeing (of the old vertex group names) there.

Since the materials are copied in the "for_eval" version anyway,
it seems to make sense to copy the vertex group name list there also.

Fixes T89877, and also the failing `deform_modifiers` test.

Differential Revision: https://developer.blender.org/D11936

Cleanup: Move UI list template code to own file (C++)

This move was already prepared with 788d38046032 and 26b098c04fbe. The
template is quite big already, better to give it its own file. Plus it
could use some C++ features like RAII and maybe some more object
oriented code. I plan further refactoring there.

Cleanup: Remove use of designated initializers in C++ code

Does not compile on Windows.

Cleanup: Clang tidy

UI: Flip driver editor debug lines

In driver editor, vertically flip the value debug lines to align
them with the timeline header values. This makes it easier to read
the values. Also set the line width explicitly, which was incorrect
in some cases.

Differential Revision: https://developer.blender.org/D8877

Assets: AssetHandle type as temporary design to reference assets

With temporary I mean that this is not intended to be part of the
eventual asset system design. For that we are planning to have an
`AssetRepresentation` instead, see T87235. Once the `AssetList` is
implemented (see T88184), that would be the owner of the asset
representations.

However for the upcoming asset system, asset browser, asset view and
pose library commits we need some kind of asset handle to pass around.
That is what this commit introduces.
Idea is a handle to wrap the `FileDirEntry` representing the asset, and
an API to access its data (currently very small, will be extended in
further commits). So the fact that an asset is currently a file
internally is abstracted away. However: We have to expose it as file in
the Python API, because we can't return the asset-handle directly there,
for reasons explained in the code. So the active asset file is exposed
as `bpy.context.asset_file_handle`.

Assets: Show asset path in asset browser sidebar

It's useful to know where an asset is stored in, before this there was no way
to tell this. This could probably be displayed nicer in the UI but we're
currently unsure how. But at least the information is there now.

Assets: Initial Asset List as part of the Asset System design

Implements a basic, WIP version of the asset list. This is needed to
give the asset view UI template asset reading and displaying
functionality.

See:
* Asset System: Data Storage, Reading & UI Access - https://developer.blender.org/T88184

Especially the asset list internals should change. It uses the
File/Asset Browser's `FileList` API, which isn't really meant for access
from outside the File Browser. But as explained in T88184, it does a lot
of the stuff we currently need, so we (Sybren St�vel and I) decided to
go this route for now. Work on a file-list rewrite which integrates well
with the asset system started in the `asset-system-filelist` branch.

Further includes:
* Operator to reload the asset list.
* New `bpy.types.AssetHandle.get_full_library_path()` function, which
gets the full path of the asset via the asset-list.
* Changes to preview loading to prevent the preview loading job to run
eternally for asset views. File Browsers have this issue too, but
should be fixed separately.

File/Asset Browser: Extend file-entry and asset handle Python API

Adds the following to `bpy.types.FileSelectEntry`:
* `id_type`: The data-block type the file represenets, if any.
* `local_id`: The local data-block it represents, if any (assets only).

And the following to `bpy.types.AssetHandle`:
* `local_id`: The local data-block the asset represents, if any.

This kind of information and the references are important for asset related
operators and UIs. They will be used by upcoming Pose Library features.

Assets: Abstraction for temporary loading of asset data-blocks

This is an editor-level abstraction for the `BLO_library_temp_xxx()`
API for temporary loading of data-blocks from another Blend file. It
abstracts away the asset specific code, like asset file-path handling
and local asset data-block handling.

Main use-case for this is applying assets as presets that are based on
data-blocks, like poses. Such preset assets are an important part of the
asset system design, so such an abstraction will likely find more usage
in the future.

Assets: Open Blend File operator

Add operator 'Open Blend File' to the Asset Browser. This operator:
- starts a new Blender process,
- opens the blend file containing the asset,
- monitors the new Blender process, and when it stops,
- reloads the assets to show any changes made.

Animation: apply pose to all or selected bones of armature

New function `BKE_pose_apply_action_all_bones()`, which will be
necessary for the upcoming pose library v2.0.

This renames the function `BKE_pose_apply_action` to
`BKE_pose_apply_action_selected_bones`, to reflect that it only works on
selected bones, to contrast it to the new function.

Animation: add function to blend Action into pose

Add function `BKE_pose_apply_action_blend()`, which blends a given
Action into current pose. The Action is evaluated at a specified frame,
and the result is applied to the armature's pose.

A blend factor can be given to blend between the current pose and the
one in the Action. Quaternions are interpolated with SLERP; it is
assumed that their FCurves are consecutively stored in the Action.

This function will be used in the upcoming new Pose Library.

Animation: new pose library based on Asset Browser

Introduce new pose library, based on the Asset Browser. Contrary to the
old pose library (in `editors/armature/pose_lib.c`), which stored an
entire library of poses in an `Action`, in the new library each pose is
its own `Action` datablock. This is done for compatibility with the
asset browser, and also to make it easier to attach preview images,
share datablocks, etc. Furthermore, it opens the door to having
animation snippets in the pose library as well.

This commit contains the C code for the pose library; in order to fully
use it, an addon is required as well (which will be committed shortly).