Blender Git Loki

Exporter: add OBJCurves tests.

Corresponds to file https://developer.blender.org/F9278970 which
should be dropped at `io_tests/blend_scene/all_curves_2_92.blend`.

Rename: "Nodes" modifier to "Empty" (take 2)

Leave the internal DNA data struct as "Nodes", and only rename the
modifier and user interface to Empty.

See 4a2734a835c10d5bffaaceddc59c for the original take and the reasoning
for renaming from Nodes to Empty.

Revert "Rename: "Nodes" modifier to "Empty""

This reverts commit 4a2734a835c10d5bffaaceddc59c41837801f402.

Reverting this so that all we change is the UI name, not the DNA struct
and the internal variable names.

VK: Initial Base implementation

Geometry Nodes : Removing "Combine Strings" and Group Instance ID from UI

This diff remove "Combine Strings" and "Group Instance ID" nodes from the UI (but keep them in the source code to be able to bring them back if needed).

This is part of "Cleanup 1st Sprint Nodes" (https://developer.blender.org/T82370).

Differential Revision: https://developer.blender.org/D9558

Rename: "Nodes" modifier to "Empty"

This introduces a regression. Users need to re-create their modifiers
and set their values again. The NodeGroups are intact so all they need
is to create new "Empty" modifiers and set the node group.

---

Original problem: Eventually most modifiers will be node-based, so naming
this new modifier "Nodes" will get outdated pretty quickly.

Calling it "Empty" it's fairly descriptive, since the node tree simply connects
the modifier Input to an Output, without any effect.

There is a potential problem, that it could be associated with the
Empty object type. Like some sort of Hook.

This is the task T82700, and the design task T82537.

GPencil: Fix compiler errors after merge

Some functions parameter list changed

Merge branch 'master' into greasepencil-object

Conflicts:
source/blender/blenkernel/intern/gpencil_geom.c

GPencil: Fix edit curve not being written to file

GPencil: Fix compiler error after rename

Geometry Nodes: Improve error messages for property mismatches

Related to T82438. This adds some basic checks for common errors and
currently unsupported socket types in the modifier.

Fall back to single threaded preview creation if ID can't do it thread-safe

Merge branch 'master' into greasepencil-edit-curve

Merge branch 'master' into greasepencil-object

Make object preview generation thread-safe

When creating the preview, the object is now deep-copied so the preview
generation doesn't have to be done on the main thread, or block it.

There's a failing assert for objects with particle settings, I think the assert
needs to be corrected but I'll leave this aside for later. Disabled it for now.

Merge branch 'master' into geometry-nodes

Merge branch 'master' into xr-actions-D9124

XR: Support mesh editing with grab operator

Uses similar mechanics as object mode, but interpolation and offsets
are not yet supported.

XR: Ensure mesh object for edit mode raycast

Increase line width for controllers / raycast