Blender Git Loki

Revert "Modifier Drag&Drop"

This reverts commit 91d0f6f1139054abcfca3d8044eae6e2bb82fb9a.

Artists here seem to dislike the interface being stuck after a change to
modifiers, reverting until an interactive solution is coded.

Don't push merge without building first fix.

Merge branch 'wiggly-widgets' into gooseberry

Conflicts:
source/blender/blenloader/intern/versioning_270.c
source/blender/editors/include/ED_view3d.h
source/blender/editors/space_sequencer/sequencer_draw.c

Transform widget: Don't highlight rectangle (cursor should be enough
indication)

Merge branch 'master' into wiggly-widgets

Conflicts:
source/blender/blenloader/intern/versioning_270.c
source/blender/editors/include/ED_view3d.h
source/blender/editors/space_sequencer/sequencer_draw.c
source/blender/editors/space_view3d/view3d_draw.c
source/blender/makesdna/DNA_view3d_types.h

Fix blenderplayer not compiling after modifier d&d commit

Fix access freed memory when doing constraints ID counter on main free

Basically just made constraints free function aware of possible do_id_users
argument, same as we've got for objects, object data and so on.

Fix T43905: Crash happens when press Create Plane Track

It was only happening on 32bit platforms because of alignment
differences when allocating class.

Now got rid of copy of eigen matricies stored by value in the
residual block which solves aligment issues and should also
give some unmeasurable speedup.

Fix issue reported on irc by Sebastian, crash when undoing and changing
screen.

Apparently the screen on the given file did not have a scene attached.

Not sure how this is possible exactly, but for now just guard against it
at load time by assigning default scene in that case.

Modifier Drag&Drop

**Warning: WIP!** Basic functionality works fine and there shouldn't be any crashes, however, if you occur issues, feel free to report them to me (not in the bug tracker!)

Some more effort is needed to get this ready for master, but I thought it would be nice as a little present for the Gooseberry-team (I heard some of you were requesting this?) and the ones using the Gooseberry-builds :)

Oh, and better not look at that code, it's ugly and a lot of changes are planned, I just wanted to get something working before getting into details.

Fix metaball->mesh removing all metas in the scene

Assumed the entire scene used the one motherball.

Fix broken "force setting multisamples only once", introduced in b5b359b48f7f

Correction to previous commit

Calling ensure_lookup_table for each face is stupid! :/
(Noted by Sergey - thx)

Fix typo in "Add" and "Subtract" mode of Vector Math node.

Differential Revision: https://developer.blender.org/D1003

Fix T43904: calc_vert_angle returns wrong value

This was mis-named, rename to `calc_edge_angle`
and allow a fallback value in the case when the vert doesn't have 2-edges.

Cleanup: quiet minilzo warnings

PyAPI: clarify fallback docstring

Cleanup: unused macro warning

BMesh: Add extended BM_vert_calc_edge_angle that takes a fallback value

Cleanup: unused warnings