Blender Git Loki

partial fix for bullet related crashes or lockups

especially when 2 or more dynamic objects fracture each other, there are still crashes / lockups

Cycles: Improved robustness of hair motion blur.

In some instances, the number of control vertices of a hair could change mid-frame.
Cycles would then be unable to calculate proper motion blur for those hairs. This adds
interpolated CVs to fill in for the missing data. While this will not necessarily result in
a fully accurate reconstruction of the guide hair, it preserves motion blur instead of disabling it.

Reviewers: #cycles, sergey

Reviewed By: #cycles, sergey

Subscribers: sergey, brecht, #cycles

Tags: #cycles

Differential Revision: https://developer.blender.org/D3695

Update default theme for UserPref navigation bar

Uses a slightly darker grey than the main region. This color is used in
various other places too.

cleanup: removed outdated/outcommented code

Use new navigation region type for UserPref navigation

Merge remote-tracking branch 'origin/blender2.8' into collada2.8

refactor: Simplify the Collada module. moved Blender context information into its own class.

Add GP modifer to extract strokes

Add option to select contour verts

Fix merge conflicts

Used 'git stash' to stash a single file, which (for some reason) caused quite
some trouble. Should be fine again now.

Merge remote-tracking branch 'origin/blender2.8' into collada2.8

seems dynamic cache behavior is fixed, tests looked good .

Merge branch 'blender2.8' into userpref_redesign

Merge branch 'blender2.8' into userpref_redesign

execute fracture in dynamic should return the intact object

added constraint search size, made mixed/none constraint setting in dynamic work

plus fix attempts for dynamic cache logic

added separate activation shard size for dynamic fracture

exposed apply_force and apply_torque for rigidbody to python

Revert "Fix T57884: Triangle count is incorrect when above around 2 billion"

This reverts commit a684165cad4cc3afaf89a2118e44a70555cadfae.

Fix T57884: Triangle count is incorrect when above around 2 billion

Maniphest Tasks: T57884

Differential Revision: https://developer.blender.org/D3962