Blender Git Loki

GP: New clean loose points operator

This operator clean any stroke below a defined number of points. This is used because sometimes when use eraser some points keep missing.

Also some changes in the UI menu.

GP: Redesign logic of drawing engine for object instance support

The initial design assumed that there was only one object for each unique name, but that was not the case when instances were created.

Now, instances are supported and speed has been greatly improved when repetitions are used.

As a result of this change, the option to create objects has been removed in the Instances modifier. This option was strange and was also against Blender's design rules, since a modifier should never create objects. The old functionality of the modifier can be achieved with instances.

Also, several memory leakage problems that were not previously detected have been eliminated, and especially in the grid and in the drawing process

Onion Skin is not supported in multi-user datablocks. Support this, makes incompatible with instances. We need find a solution in the long term, but now it's better keep disabled and make instances work. Anyway, the new instances makes unnecessary to use muli-user datablocks.

Fix image editor not vertically centering images with region overlap.

Add sanity check in mult_face_search

Cleanup: remove unused R_ORTHO / R_PANORAMA flags.

Merge with upstream changes

Fix pose mode border deselect not working after recent changes.

More opti step tweaks

Fix T56012: brush stencil overlay draws in the wrong location.

Cleanup: stop using DerivedMesh in mesh cache modifier.

Fix T55587: bugs with popovers in collapsed menus, like the timeline header.

UI: tweak drawing of header status text for transparent headers.

Multires: Initial groundwork to hook up displacement to new Subdiv object

Adds a displacement support for OpenSubdiov based subsurf object implemented
as a callback which gives vector displacement in object space. Currently is
implemented to calculate displacement based on myltires displacement grids,
but we can support things in the future if needed.

Submitting to review to see if there is something obviously wrong in the
direction (old multires code was sharing same displacement code to both
calculate final displaced mesh and reshape an existing one, which is rather
confusing and probably can be done more cleanly?).

Reviewers: brecht

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D3604

Clip Reconstruction: Cleanup - use const for selection synchronize

In order to avoid the discard qualifier warning I had to change a few extra
things.

Skip bundle names when drawing selection pass

Fix border select operations in object mode

UI: correct selection operation names

Fix viewport selection of markers not updating in all editors

This includes selections both in the clip editor as the viewport.
The selection is implemented as a synchronization function called from the eval
selection update node in depsgraph.

Motion Tracking Reconstruction Viewport Drawing (T51544)

* Draw bundle names.
* Draw bundle shapes (but spheres).
* Draw custom colors for bundles.
* Support selecting bundles.
* Object bundles also fully tested.

Missing from this commit:
* Camera path.
* Spheres are not drawn as solid.
* Blue dashed line from camera to tracker objects.

further rewrite to make more readable / maintainable code