Blender Git Loki

Geometry Nodes: simplify Attribute Math node by using a new abstraction

Nodes: simplify Math code by using new abstraction layer

Nodes: initial abstraction to simplify math node implementations

Currently, implementing a node that supports math operations requires
you to write a long switch statement. The goal of this abstraction
is to reduce the number of these switch statements.

Note, this commit adds new such long switch cases. However, in the upcoming
commits existing math nodes are updated to use this abstraction, resulting in
less code overall.

Geometry Nodes: add utility method to create a dummy attribute reader

This can be used when instead of an actual attribute, a constant value
should be used.

XR: Add "controller draw style" session setting

Allows users to choose their preferred controller visualization
(controller local axes or -Z axis ray). The enum can be extended in
the future for additional visualizations.

XR: Restore XR object transforms at session end

If an object was constrained to a headset/controller pose during the
session, then its original transform will be restored at session end
to prevent unwanted changes to the scene. This will also occur when
toggling the constraint or changing the constrained object.

XR: Adjust raycast select property behavior

Combinations of properties (extend/deselect/toggle/deselect on empty)
now match view3d.select behavior.

simplify math node

add time to send data to data transfer report

support creating constant dummy attributes

support remaining math functions

Merge branch 'geometry-nodes' into geometry-nodes-deduplicate-float-math

Merge branch 'master' into geometry-nodes

Docs: 2.91 release description for Linux appdata

Merge branch 'geometry-nodes' into geometry-nodes-deduplicate-float-math

optimise BVH packing a bit

alembic: fix missing update when changing frames

Versionbump: Blender 2.91 release

File version bump

Geometry Nodes: Fix missing node editor redraw for active modifier

When the active modifier changes, or when its node group changes, the
node editor should redraw, because these actions change its context.