Blender Git Loki

Sculpt: Union and Join mode for trim tools

This enables a union boolean mode for the trimming gestures tools which
adds geometry to the mesh instead of cutting it.
It also adds a Join mode, which adds the geometry directly without
using a boolean operation.
Depending if you plan to use dyntopo or not, it is useful to have both
options available.

This is using the full depth of the object from the camera view for the
depth of the geometry, but options for controlling the trimming depth in
all modes are going to be added in later patches

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D9066

Fix T81218: Crash in pose mode using a driver on bendy bone Segment

The example file in T81218 has a driver that maps a bone's X-location to
the number of BBone segments. This caused a dependency cycle, which
resulted in bad thread serialisation, which caused the crash.

This patch breaks the dependency cycle `BONE_LOCAL` ?
`DRIVER(bones["Bone"].bbone_segments)` ? `BONE_LOCAL`. The 'Driver Data'
relation now points to `BONE_SEGMENTS` when the driven property starts
with `bbone_`.

Differential Revision: https://developer.blender.org/D9122

Batch previews: improve speed of preview generation.

Force multi-threading of preview renders by setting appropriate tile
sizes (by default it would typically render on one or two threads only).

VSE: Fix audio strips

When sequencer was moved from kernel, the DEFINES based on audaspace
were not moved along.

That means users had no way of creating new audio strips since
BKE_sequencer_add_sound_strip was ifdef'out

Cleanup: Depsgraph, reduce nesting of driver relations code

Reduce nesting of `DepsgraphRelationBuilder::build_driver_data()` by
flipping conditions and `return`/`continue` early.

No functional changes.

BLI: escape double quotes in dot export

UI messages fixes...

Fix T81459: Memory Leak Cycles Rendered Viewport

The external engine in the draw manager wasn't registered correctly.
This did not free the resources after the external engine was used.

Fix T81470: Buttons in closed panel visible during search

The buttons hide when the search finishes based on whether they are in
the "panel header" group. These buttons were not protected with a new
group. This adds a new group for operator button calls, and also makes
it so a new group is always created after the header buttons.

API Doc Gen: Do not ignore objects file

This is used by the Blender manual or other sphinx website that would
like to link to Blender's API documentation.

UI: Changes to Viewport Display UI of Volume Object and Fluid

- Density, interpolation and slicing options in Volume Object's
Viewport Display are now not aligned to each other as they are not
closely related.
- Changed the enum property for slicing ('Method') to a boolean
property 'Slice' and added a sub-panel for slicing options under
the 'Viewport Display' panel in Volume Object and Fluid for better
clarity.
- Renamed `axis_slice_method` to `use_slice` in the python API for
Volume Object and Fluid.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D9097

Sculpt: Remove mask datalayer after extracting the object

When extracting a mask, the new object is going to have the same mask on
the same vertices, so it can't be sculpted without clearing the mask
first. It makes more sense to delete the mask datalayer from the new
object.

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D9070

Fix T81343: Smooth shading normals not updating with line project tool

Just a missing update flag

Reviewed By: mont29

Maniphest Tasks: T81343

Differential Revision: https://developer.blender.org/D9077

Sculpt: Modify damping using the simulation factor of the cloth brush

This helps blending artifacts with dynamic simulation areas as the
damping increases when the vertex.

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D9084

Sculpt: Preview the active side of the line gestures

This adds a small gradient to the right side of the line to preview
which side of the mesh is going to be affected by the gesture operation.

Reviewed By: Severin

Differential Revision: https://developer.blender.org/D9106

Fix T81380: Playback set start/endframe operators can set negative
rendering range

The Allow Negative Frames option, introduced in rB21a2350248fd, allows
for negative frames, but this should only apply for playback and
animations, the rendering range should still be clamped to MINFRAME /
MAXFRAME, because rendering does not allow for negative frames. Preview
range should not be affected afaict (I am not aware of operators that
allow for rendering this range).

Maniphest Tasks: T81380

Differential Revision: https://developer.blender.org/D9112

Outliner: Move collection exclude button to restrict columns

Move the collection exclude checkbox to be with the other restrict
buttons. This makes the button consistent with the other restrict
buttons, and it makes the visual hierarchy more clear with the contents
of a collection properly indented under the collection name, rather than
the collection icon.

Differential Revision: https://developer.blender.org/D8928

Fix T81392: subdivision surface poor shading without limit surface

When the limit surface is disabled OpenSubdiv generates a set of linear
patches which are only C0 continuous, not C1. This makes it impossible to
evaluate derivatives at vertices which, in this mode, are by definition put
at boundaries of patches. Normals are calculated from those derivatives.

Solution is to disable normal calculation and let it be done downstream, as
for other modifiers. This limitation is also the reason that non feature
adaptive subdivision is badly suited for GPU evaluation.

Differential Revision: https://developer.blender.org/D9103

Cleanup: Use short for properties editor tab list

Because the active context is stored as a short in DNA it's better
to use short in the code surrounding it. Also adjusted a comment
that reflected an incorrect assumption.

GPencil: Fix unreported Layer SOLO mode broken

During the refactor, this feature was removed by error.

When this option is enabled, only the frames with a keyframe are displayed in Draw mode. This is used when fill an animation to paint only in the frames with real drawing.