Blender Git Loki

[Fast import/export] Ran clang-format

Merge branch 'master_upstream' into luca_openvdb_import_28

Fix compile errors and crashes on Windows

* Include needed Windows/DirectX headers
* Disable zero sized arraz (GCC extension)
* Add missing break causing failling assert
* Add missing semicolon in Win only code :)

Fixed split option UI for OpenVDB modifier

Pose tool: Mask expand operator

This operator is designed to use with the transform.rotate tool to
create a pose tool. It generates a mask from the active vertex,
following the topology of the mesh.

The operator has two modes. It can expand the mask to the vertex under
the cursor or to a certain number of iterations. All the iterations are
cached when the operator is invoked, so it should be usable with high
poly meshes.

I also included some hardcoded mask operations when the operator
finishes. In the future, this could be included as an operator macro if
it does not have a significant performance penalty (like redrawing all
nodes each time a new operator is invoked).

It does not support symmetry and it only works with meshes (no dyntopo
or multires).

I also fixed some bugs in the transform code that were breaking EEVEE
compatibility. Undo system still fails sometimes.

Fix compile error with system OpenXR SDK

Graphics binding types were disabled by a compiler flag then.

Cloth: Basic UI Implemented

This is not the final UI, only a rough UI for current usage, need to add option for whether or not remeshing should be enabled.

Cloth: custom split edges function
Now no need to call triangulate function after splitting edges, custom split edges function triangulates the face(s) that contain the edges that has been split

Fix volume not visible in render with "hide volume"

This fixes an issue that caused volumes to disappear in renders when the
"hide volume" or "hide uunselected" display options are enabled.

The issue was that the modifier is called prior to rendering, with the
"MOD_APPLY_RENDER" flag, as expected. However immediately after, and
while still rendering, the modifier is called again, without the render
flag, causing it to be recomputed as it should be for the viewport
display. This happens because Blender allows you to work while
rendering, and thus the display version of the modifiers has to be
computed.

The issue is of course that while this is not a problem for meshes, as
they are copied and passed along the modifier stack, data which is read
directly (such as volume data), is still subject to side-effects.

This commit prevents the modifier from updating the data while a render
is in progress, thus keeping the render data intact. This unfortunately
causes the minor side-effect of full resolution smoke being displayed in
the viewport after rendering, even when the "simplify" option is used.
Note however that this causes no extra data loading, and thus
performance is unaffected. Also note that the hiding options don't
suffer from this side effect, and so if the volume is hidden, it's
hidden state will still be in effect after the render, as hiding does
not rely on the cache being reloaded.

Fix mistake in VDB modifier UI code

When implementing the split grid channels and the velocity grids, I
forgot to update a bit of code in the UI. This fixes that issue.

Fix crashes and errors with internal smoke sims

Some special properties for VDB were causing Blender smoke sims to
crash.

Merge branch 'master' into greasepencil-object

Import OpenVDB velocity grids

This imports the OpenVDB velocity grid into Blender's own data
structure, making it available for rendering.

Fix OpenVDB start/end frame on copy

Start/end frames were being reset when copying the OpenVDB object.

Clean VDB UI a bit

Add flame display thickness to the VDB options

Add smoke display thickness to the VDB settings

Add voxel value display threshold options

LANPR: Shader free.

Profile orientation regularization works in weld case. More work distinguishing profile path from curvemapping