Blender Git Loki

Fix error selecting similar vertex groups after the 32nd

Replace 32bit int with bitmap to allow selecting
any number of vertex groups.

Cleanup: use const arguments to deform functions

This changes curve deform code not to set the objects inverse matrix,
this shouldn't cause problems as it's not used elsewhere afterwards.

Cleanup: remove redundant casts

Cleanup: naming for lattice deform functions

- BKE_lattice_deform_data_create was init_latt_deform.
- BKE_lattice_deform_data_destroy was end_latt_deform.
- BKE_lattice_deform_data_eval_co was calc_latt_deform.

Cleanup: use 'r_' prefix for return arguments

Also improve alignment.

Cleanup: comments, use bool return value

Cleanup: rename 'par', in deform code

Naming is from legacy code where the deforming object was the parent.

Modifier: skip edit-mesh conversion for armature, curve & lattice

This is an improvement over 2.7x which converted edit-mesh to mesh
(CDDM) for all 3 modifiers.

Overall this increases performance in edit-mode by around 15-20%.

Cleanup: clang-format, unused variable

Cleanup: spelling

Fix T77295: Snapping in edit mode only works for non-selected polys/verts/edges

Caused by the optimization of `Skip EditMesh to Mesh Conversion`.

Now that EditMesh is used when the Mesh has no modifiers, do not
skip the selected elements.

LibOverride: Remove 'auto override' option.

Now all overrides are handled that way. Performances of the process look
decent enough, even with production characters...

If performance issues still arise, we'll investigate other solutions.

This should also make T73154 obsolete now.

Cycles: Improve CUDA and OptiX error reporting in the viewport

This patch makes the infamous "Cancel" error in the viewport a thing of the past. Instead it
now shows a more useful error message and streamlines the error handling process in CUDA.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D8008

Add ability to remove Library data-blocks through RNA API.

Just uses same code as for all the other ID types.

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D7995

UI: Use consistent order for physics display icons

The viewport, display order matches modifiers and the outliner.

Differential Revision: https://developer.blender.org/D8001

Cloth: implement support for a hydrostatic pressure gradient.

When a fluid is put under influence of gravity or acceleration, it
forms an internal pressure gradient, which causes observable effects
like buoyancy. Since now cloth has support for simulating pressure
changes caused by fluid compression or expansion, it makes sense to
also support the effects of gravity.

This is intended for better simulation of objects filled or
surrounded by fluids, especially when constrained by collisions
or pinned vertices, and should result in more realistic shapes.

Obviously, this doesn't actually simulate fluid dynamics; instead
it is assumed that the fluid immediately adapts to changes in the
shape or acceleration of the object without friction or turbulence,
and instantly reaches a new static equilibrium.

Differential Revision: https://developer.blender.org/D6442

install_deps: bumped USD library version 19.11 ? 20.02

USD: Library upgrade 19.11 ?�20.02

This upgrade required a few changes:
- Some parts of our patch are no longer necessary, as the USD library
now includes those changes.
- The rest of the patch needed adjustment as the `pxr/base/lib/*`
directories in USD's source code have moved to `pxr/base/*`.
- Updated library names on Windows -- thanks @LazyDodo.

Note that this does not enable the USD Python API for inclusion in
Blender. It just aims at being an as-simple-as-possible version upgrade
of the USD library.

USD: Use new material binding API

The material binding API that we used was removed in the Universal Scene
Description library version 20.02. Using this new API, the code is
compatible with both USD 19.11 and 20.02.

Fix T77586 EEVEE: UDIM image Texture doesn't Display properly