Blender Git Loki

OpenSubdiv: Proper detection of crease changes

OpenSubdiv: Some debug-only code sneaked into previous commit

OpenSubdiv: Make topology orientation optional

OpenSubdiv: Fixes for crease in non-manifold meshes

Basically non-manifold edges are expected to be sharp by OpenSubdiv.

Theres still some work required, see the inlined comment.

OpenSubdiv: Typo fixes in comments

OpenSubdiv: Rework vert-edge and vert-face ordering

Now the code survives multiple non-manifolds happening on the vert.

Still not totally optimal but at least gives much better mesh support.

OpenSubdiv: Fix for weirdly ordered lines

Fix T45605 crash with editmode selection on solidify modifier.

Looks like derivedmesh draw code always assumed a mesh is available.
Make sure that if we use a bmesh, a flag is used to control that.

Audaspace: fixes for building with Quicktime on Mac.

Do not show fps while scrubbing.

Gooseberry animation feature: Add toggle that disables modifiers on fcurves.

Feature is found as per channel option in graph editor.

Clean channels tool for Hwoozeberry.

Basically it's a clean keyframes tool, but also removes a channel if the
only remaining keyframe has the default value only and is not used by
drivers or generative modifiers.

It's was used to help with performance of keyframe-heavy scenes in
gooseberry.

Note, as always the curve left after the clean tool is used is not the
same as the original, so this tool is better used before doing custom
editing of fcurves and after initial keyframe insertion, to get rid
of any unwanted keyframes inserted while doing mass keyframe insertion
(by selecting all bones and pressing I for instance)

Add mathutils.bvhtree API

Originally D966 by @lukastoenne, with own additions

- trees can be initialized from Object's, BMesh,
or passed in as vert+polygon arrays.
- original indices of ngons/faces are used. (instead of tessellated indices).
- ray_cast, find_nearest methods
- find overlapping faces between 2 trees

Expose bvhtree_sphereray_tri_intersection for general use

OpenSubdiv: Make empty meshes supported and not crashing

Port optimization from gooseberry branch:

Treat scrubbing as animation.

This is checked during various updates to avoid
some costly calculations.

Cleanup

Math Lib: add isect_tri_tri_epsilon_v3 function

Remove not really helpful debug print

If it's still considered useful please move it inside G.debug or ifdef code.

ImBuf: Fixes for openexr images

- Fixed crash loading multilayer EXR
- Fixed another memory leak loading multilayer EXR