Blender Git Loki

RNA: add 3D cursor matrix attribute

Avoids having to check rotation modes to get the orientation.

Fix T64651, T64658: image texture not set to non-color properly

The version check was wrong, only working for older files.

Fix unreported: Presselection cycle not working in multiple meshes editing.

Theme: add color difference for every other row

D4862 by @CandleComet with minor edits.

Cleanup: remove 2.4x panel tabs

This makes the code confusing since we now have two other kinds of tabs
(navigation bar and panel categories).

Cleanup: panel layout logic

Workspace was being assigned in a loop, make some vars const.

Cleanup: sort DNA renaming defines

ClangFormat: remove FAKE_SELECT_MODE_BEGIN from ForEachMacros

This isn't used for looping.

Fix T54686: objects don't occlude each other for edit-mesh select

Theme: Match edit mode in viewport and uv/image editor.

Also make the grid brighter as it can conflict with mesh wires in wireframe mode.

Theme: Blender Light update

* Align category icons and color use with Default theme.
* Set colors for new properties and regions.
* Fix several issues.

Needs further testing to tackle all editors but this puts it at much more
usable level compared to how it was.

Animation: treat F-Curves with no keys as if muted/not existing.

When normally editing curves, deleting the last keyframe also
deletes the curve. Thus if for some reason it didn't happen,
e.g. maybe due to removing keys directly via Python, skip the
bad curve instead of resetting the channel to zero.

Armature Constraint: don't calculate the unneeded ct->matrix for solve.

This constraint requires full bone data to evaluate, so it can't
use the generic single target matrix system. Calculating it is
thus useless waste of CPU time.

Py NodeShader wrapper helper: add support for new Alpha setting of Principled BSDF.

Now that we have real alpha in BSDF, it's much better option for
transparency, than previously used Transmission value.

Related to T64609.

Fix T64649: Deprecated Annotation editing causes a crash

The Edit option was removed from annotations and the buttons must not be in the panel.

GPencil: Invert Fade Object slider

The Fade Objects and Fade Layers parameters had opposite meaning and this was not correct.

Now, both parameters work in the same direction.

Theme: don't use red as hue for shading icons.

It can be confused with an error or something wrong in the UI.

Theme: Darker grid.

Theme: match outliner/properties colors with modes in viewport.

Helps to:
* Make a connection between what we see in Outliner, Viewport and Properties editor
(clicking on the obdata icon takes us to Edit mode, which shares colors).
* Quickly tell which mode we are in.
* Armatures have now distinct color when in Object, Edit, and Pose modes.

Missing is Pose mode which is currently cyan in the viewport and obdata category in properties,
it would probably need its own special category though as it doesn't match the others.

Objects: new 3D cursor alignment option when adding objects

The choices are now World, View and 3D Cursor.

This breaks Python API compatibility, add-ons that add objects with this
parameter will need to be updated.

Differential Revision: https://developer.blender.org/D4706