Blender Git Loki

Simulations: Add new simulation data block

This data block will be the container for simulation node trees.
It will be used for the new particle node system (T73324).

The new data block has the type `ID_SIM`.
It is not visible to users and other developers by default yet.
To enable it, activate the cmake option `WITH_NEW_SIMULATION_TYPE`.

New simulation data blocks can be created by running `bpy.data.simulations.new("name")`.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D7225

Merge branch 'blender-v2.83-release'

Keymap: Add sequencer scrub with box-select & RMB select

Also support selecting by dragging a box over the strips which
previously did nothing.

Merge branch 'blender-v2.83-release'

Fix T74600: Sequencer blade tool inaccessible with RMB select

Declare `anim.change_frame` explicitly for each editor.

In sequencer, scrubbing in editor area is possible only with
select/tweak tool.

This change is to resolve conflict between scrubbing and tool actions.

Cleanup: redundant parenthesis, NULL checks

Merge branch 'blender-v2.83-release'

Cleanup: accidental value declaration with struct type

Merge branch 'blender-v2.83-release'

Fix invalid comparison checking button unit type

Checking button unit type was length for proportional
multi-button adjustment wasn't working.

Merge branch 'blender-v2.83-release'

Fix T75778: Missing ME_VERT_PBVH_UPDATE in Surface Smooth

Without this flag the PBVH won't update taking the modified vertices
into account.

Reviewed By: brecht

Maniphest Tasks: T75778

Differential Revision: https://developer.blender.org/D7453

Fix T75766: Smooth mask using mesh vert indices direclty

In the vertex iterator vd.index should always be used. I probably
introduced this in a refactor.

Reviewed By: jbakker

Maniphest Tasks: T75766

Differential Revision: https://developer.blender.org/D7446

Fix T75329: Missing show_face_sets checks for Multires

These values were hardcoded before Face Sets were enabled for Multires,
so enable the show_face_sets checks now.

Reviewed By: jbakker

Maniphest Tasks: T75329

Differential Revision: https://developer.blender.org/D7444

Fix T75662: Surface Smooth filter not checking face sets

In the main mesh filter loop vertex that do not have the active face set
are skipped, so in the following surface smooth displacement loop these
vertices were deformed using an uninitialized laplacian_disp value.
Now the main loop initializes the laplacian_disp for all vertices and
the deformation based on face sets is skipped in the second loop.

Reviewed By: jbakker

Maniphest Tasks: T75662

Differential Revision: https://developer.blender.org/D7443

Fix crash on Multires Face Set visibility sync

Multires uses the data of the Face Sets stored in the base mesh to
manage the grid's visibility, so these pointers can no longer be set to
NULL when editing Multires objects as they are requried for some operations.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D7431

First pass of layout updates for remaining constraints

Merge branch 'blender-v2.83-release'

Fix missing Outliner selection syncing on "Select Hierarchy"

Adds syncing to a few operations that change selection, to avoid some
annoyances (like drag and drop of hierarchy to a different collection
only linking the parent to the collection).

Note that there's further refinement work for selection syncing in
D5572, but is awaiting some code design decisions. Meanwhile such quite
annoying issues should be fixed.

Addresses T75610.

Fluid: Fix for caches being released when file is loaded