Blender Git Loki

Tweak constraint copying code for static override needs.

No expected change in any existing behaviour from this commit.

UI: run redo poll check in operators context

UI: fix operator redo showing empty popovers

Many operators have no options,
showing a popover button with no content isn't good.

UI: disable popovers when panel poll fails

WM: utility to check if an operator will draw a UI

Checking if a redo operator will show something is needed
to avoid empty redo popover.

Edit Mesh: look-cut copy-on-write support

Note: As already commented in the code, the ideal solution would
be to pass select mode as parameter to ED_view3D_backbuf_validate.

Without that we have to resort to the hack solution of writing to
evaluation data.

Static override: Add basic two-passes system needed for apply insert op.

And a dummy placeholder for object constraints... All this is WIP of
course!

Static overrides: make it clear collections need specific apply callbacks.

Static override: initial work for generating 'insertion' in collections.

Does not yet support applying those operations, only detecting
insertions and generating matching rules was already rather complicated.

Also got rid of ;ost rna_path string allocation in collection diffing
code, could help a bit with speed too.

UI: move object selector into 3D view

This matches the new convention for left-handed mode selectors,
however we're still undecided on exactly how this should work.

For now test this out as a convention for all space types.

Eevee: Don't enable temporal AA when using 1 sample only.

This was producing infinite rendering but wasn't noticeable.

Eevee: Shadows: Only tag as shadow caster if a shadow is cast.

This leads to great improvement if the scene have moving objects without
shadows (shadows disabled in the material panel).

UI: move space-mode selectors before menu items

This adds a convention to have a spaces primary mode selector
positioned to at the left of the header.

Modifiers: Fix crash when entering edit mode on unported modifiers

Fix number sliders for the topbar

Extract common modifier parameters into ModifierEvalContext struct

The contents of the ModifierEvalContext struct are constant while iterating
over the modifier stack. The struct thus should be only created once, outside
any loop over the modifiers.

Formatting

Modifiers: Array DerivedMesh ? Mesh

Introduced CDDM_from_mesh_ex() to create a non-referencing CDDM

This allows the mesh to be freed and the CDDM kept.

Modifiers: Mirror DerivedMesh ? Mesh