Blender Git Loki

Fix T77712: Crash on proxied rig, custom bone shape, driver targeting rig

It turns out that
`DepsgraphNodeBuilder::build_object_data_geometry(Object *object, bool
is_object_visible)` was called for the custom shape with
`is_object_visible=false` when there are drivers, and
`is_object_visible=true` when there aren't any.

Refactor: move blenloader code of surface deform modifier

Refactor: move more blenloader code into modifier files

Sculpt Vertex Colors: Initial implementation

Sculpt Vertex Colors is a painting system that runs inside sculpt mode, reusing all its tools and optimizations. This provides much better performance, easier to maintain code and more advanced features (new brush engine, filters, symmetry options, masks and face sets compatibility...). This is also the initial step for future features like vertex painting in Multires and brushes that can sculpt and paint at the same time.

This commit includes:
- SCULPT_UNDO_COLOR for undo support in sculpt mode
- SCULPT_UPDATE_COLOR and PBVH flags and rendering
- Sculpt Color API functions
- Sculpt capability for sculpt tools (only enabled in the Paint Brush for now)
- Rendering support in workbench (default to Sculpt Vertex Colors except in Vertex Paint)
- Conversion operator between MPropCol (Sculpt Vertex Colors) and MLoopCol (Vertex Paint)
- Remesher reprojection in the Voxel Remehser
- Paint Brush and Smear Brush with color smoothing in alt-smooth mode
- Parameters for the new brush engine (density, opacity, flow, wet paint mixing, tip scale) implemented in Sculpt Vertex Colors
- Color Filter
- Color picker (uses S shortcut, replaces smooth)
- Color selector in the top bar

Reviewed By: brecht

Maniphest Tasks: T72866

Differential Revision: https://developer.blender.org/D5975

UI: Don't expand bevel active tool setting

Fix mistake in bevel versioning

Use the correct modifier struct name

Cleanup: style, raw multi-line string sphinx updater

Docs: quiet deprecation warning, add missing context members

API docs: intro overhaul

- Update terminology, spelling, formatting.
- Rename screen to workspace.
- Update for 2.8 UI changes.

Fix T77803: IK Degrees of freedom drawing glitch

Forgot to update the lineOutput what resulted in that the sphere was not
rendered on all platforms.

Reviewed By: Cl�ment Foucault

Differential Revision: https://developer.blender.org/D8098

Fix T77893: Crash drawmanager threading custom data

Tangent normals were temporarily saved in the original given layers but
the typeinfo wasn't updated. This lead to several issues since we
changed the threading of the mesh extraction.

This patch stores the tangent normals in a temporary custom data on the
stack this way the typemap doesn't need to be updated.

Still need to run the tests for an hour to see if it is fixed

Reviewed By: Cl�ment Foucault, Philipp Oeser

Differential Revision: https://developer.blender.org/D8095

EEVEE: Motion Blur: Add accumulation motion blur for better precision

This revisit the render pipeline to support time slicing for better motion
blur.

We support accumulation with or without the Post-process motion blur.

If using the post-process, we reuse last step next motion data to avoid
another scene reevaluation.

This also adds support for hair motion blur which is handled in a similar
way as mesh motion blur.

The total number of samples is distributed evenly accross all timesteps to
avoid sampling weighting issues. For this reason, the sample count is
(internally) rounded up to the next multiple of the step count.

Only FX Motion BLur: {F8632258}

FX Motion Blur + 4 time steps: {F8632260}

FX Motion Blur + 32 time steps: {F8632261}

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D8079

Animation: Only update timeline header during playback

The header of all SPACE_ACTIONs are tagged for redraw. Only when the
action editor is showing the timeline it is needed. No noticeable
performance increase. But better to save some CPU cycles.

Reviewed By: Sybren St�vel

Differential Revision: https://developer.blender.org/D8074

Cleanup: remove some dead code

Cleanup: renamed `do_draw_overlay` to `do_draw_paintcursor`

To make a better distinction with region overlay.

Performance: Draw play head as an overlay

When playing back animations a playhead is updated in all the animation editors.
The drawing of the playhead is part of the drawing of the main region
`RGN_TYPE_WINDOW` that redraws the whole region.

This change will draw the play head and window scrollers when updating the
screen. This affects the Action editor, Timeline, Graph editor, NLA editor and
Sequence editor. There is noticeable speedup when using complex animation files.

Spring 02_020_A.anim.blend fps went from 11.8 to 12.5 when showing a timeline
and a action editor on a Ryzen 1700.

* When playing back animation the markers don't jump up/down when near the
frame. This could be added back.

Reviewed By: Brecht van Lommel

Differential Revision: https://developer.blender.org/D8066

Preferences: New experimental settings for particle system and hair

This replaces the cmake options `WITH_NEW_OBJECT_TYPES` and
`WITH_NEW_SIMULATION_TYPE` with two experimental userpref settings:

* `use_new_particle_system`: Enables the point cloud type and the simulation editor.
* `use_new_hair_type`: Only displays the add-operator in the add menu for now.

Note, in the current state you can't do anything productive with the new particle
system or the new hair type. Features will be added step by step in the upcoming
weeks and months.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D8096

Cleanup: USD, move code from `USD` to `blender::io::usd` namespace

No functional changes.

Transform: default to median center instead of bounds

When neither bounds or median is selected, snapping the cursor to
the selection was using bounds which often doesn't give useful results.

Resolves T78135

Functions: Multi Function Network

A multi-function network is a graph data structure, where nodes are
multi-functions (or dummies) and links represent data flow.
New multi-functions can be derived from such a network. For that
one just has to specify two sets of sockets in the network that
represent the inputs and outputs of the new function.

It is possible to do optimizations like constant folding on this
data structure, but that is not implemented in this patch yet.

In a next step, user generated node trees are converted into a
MFNetwork, so that they can be evaluated efficiently for many particles.

This patch also includes some tests that cover the majority of the code.
However, this seems to be the kind of code that is best tested by some
.blend files. Building graph structures in code is possible, but is
not easy to understand afterwards.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D8049