Blender Git Loki

Fix background image rotation and offset

- Offset was halved & not compensating for non-square aspect.
- Rotation was flipped.

Fix T67548: Camera background-image ignores shift

Regression from 2.79

Fix T65980: Boolean crash with many intersections on a single face

Fix T67117: Font thumbnails crash to desktop

We were missing a null pointer check for invalid fonts.

Fix T67315: Redo transform disables snap

Fix T66768: Grid fill span not working

Fix T67459: Dope Editor, muting channels with shortcut doesn't work

Tracking: Give more reasonable error message directly in the interface

Before this the message could be too generic which was simply saying
that console is to be checked. This isn't very useful in cases when
we know that reconstruction is failed because of lack of good keyframes
or failure of initial reconstruction if there is no enough parallax
on the selected keyframes.

Fix T67089: Solve camera motion generates "Solve error: nan"

The code was missing some checks for whether keyframe selection
went successfully and whether reconstruction has been successfully
initialized.

The interface still gives quite generic message, with the details
printed to the console. This can be addressed separately.

fix: unreported: Collada using incompatible Enumeration types for compare

Fix T67334: Blender does not exit after saving

Fix T65386 Eevee: Crash after baking indirect lights or cubemap

I'm not sure this fixes the root of the problem. The file from the ticket
seems to have been corrupted in some way.

We MIGHT want this in 2.80.

Cleanup: Rearrange the order of isect_ray_ray_v3 parameters

And remove redundant add operation.

Fix T67299: UV Stretching Overlay of type "Area" fail when any face is hidden

We want to include this for 2.80

Fix T65402: Syntax error causes CPython assert

Fix T67450: Crash undoing edit-mode lattice resolution

Fix T63775: Toolbar icons ignore BLENDER_SYSTEM_DATAFILES

The environment variable to locate system data-files was
ignored by toolbar icons.

Add bpy.utils.system_resource
to match Blender's internal data-file access.

Fix T67389: Transform constraints fail at large distances

Fix T67040: Undo crashes after renaming

Correct fix that doesn't cause T67217.

Temporarily removing the excluded undo step broke memfile-undo
since freeing the undo steps needs to access other steps in
the list to merge shared chunks, see: memfile_undosys_step_free.

Pass the exclude step as an argument instead.

Incompatible usage of the Collada transparency value

Some external tools seem to have issues with the definition
of Collada <transparency> - a float value in range (0,1).
However it is possible to use the <transparent> color as a container
for the <transparency> value. This seems to be a more reliable
method to export transparency values from Blender PBSDF Shaders.

The relevant documentation is in the collada 1.14 reference manual,
page 7-5 about the usage of transparent and transparency.

This fix makes export and import of the <transparency>
and <transparent> values more convenient and more reliable.

Reviewers: brecht, jesterking

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D5305