Blender Git Loki

[msvc] Set proper OpenSubdiv flags when not using find_package to find opensubdiv. Fixes T50548

Blender 2.78c: Officially move to 'c'

Merge branch 'master' into HMD_viewport

Conflicts:
source/blender/makesdna/DNA_scene_types.h

Cycles: Fix wrong render results with texture limit and half-float textures

Fix T50748: Render Time incorrect when refreshing rendered preview in GPU mode

Cycles: Fix wrong render results with texture limit and half-float textures

Cycles: Add utility function to convert float to half

handles overflow and underflow, but not NaN/inf.

new manta functions to handle moving obstacles

added function to set obstacle velocities at fl/obs border, cleanup for averageVel function (more general name and vec3 argument instead of mac)

Rework of BKE's mesh_render to support BMesh directly.

Note that since there is no (efficient) ways to get arrays of
MVert/MEdge/etc. out of a BMesh, I refactored quite heavily internals of
BKE_mesh_render.

Now, when you do need acess to mesh data to generate cached batches, you
create an abstract struct from mesh (either Mesh or BMesh if available),
and then use advanced helpers to extract needed data, on a per-item
basis (no more handling of arrays of verts/edges/... in batches code).

This allows to:
* Avoid having to create arrays of BMesh elements.
* Take advantage of existing advanced BMesh topology and connectivity data.

Reviewers: dfelinto, fclem, merwin

Differential Revision: https://developer.blender.org/D2521

Fix T50656: Compositing node editor is empty, no nodes can be added

Fix building full.

Merge branch 'master' into blender2.8

Fix T50748: Render Time incorrect when refreshing rendered preview in GPU mode

Fix T50736: Zero streaks in Glare node.

Please never, ever use same DNA var for two different things. Even worse
if they do not have same type and ranges!

This is only ensuring issues (as described in report, but also if
animating both RNA props using same DNA var... yuck).

And we were not even saving any byte in DNA, could reuse some padding
there to store the two new needed vars (yes, two, since we cannot re-use
existing one if we want to keep backward *and* forward compatibility).

Silence "defined but not used" warnings

OpenGl immediate mode: remove imm_draw_line

Replaced all calls to `imm_draw_line` by plain `immVertex2f` calls, and
removed `imm_draw_line`, as that function was not supposed to exist in
the first place, and causes unnecessary calls to `immBegin`/`immEnd`.

Part of T49043

OpenGl immediate mode: fix screen_draw.c

* Fix several wrong coordinates, causing things to be drawn in the wrong places.
* Remove unexpected return.
* Slight peformance improvement, by reducing number of shader binds.
* Minor code style stuff.

Part of T49043

Fix possible crash in various 3D View operators

Was actually harmeless and not crashing, but I'd say more or less only
by luck: the NULL-check for region data would only evaluate to true for
the correct 3D View region. However, if we were to add region data to a
different region type in future, this would lead to undefined behavior
if executed in the wrong region.

Fix issues when reordering nested collections

Item was inserted at the head of the top-level collection list, instead
of parent-level one.

Columns should be expandable by default