Blender Git Loki

OpenSubdiv: Fix missing support of flat shading in textured viewport

OpenSubdiv: Use proper material index

Merge branch 'master' into blender2.8

Conflicts:
source/blender/blenkernel/BKE_particle.h
source/blender/blenkernel/intern/library.c
source/blender/blenkernel/intern/particle.c

Cycles: Fix SSS with spatial splits and motion blur

Resolve build error on OSX

Cleanup: debug-only variable.

Error in curve update, uninitialized var use

Curve Drawing: Use cyclic for stroke with near start/end points

Curve Drawing: Add option to use new refit method

Curve Fitting: Add alternate 'refit' method

This is an alternative method for fitting a curve which incrementally simplifies the curve, then re-fits.

Generally gives better results, also improves corner detection.

Fix use of uninitialized variable in recent SSS fix.

Fix T48397: Can not bake tweaked NLA

We need to leave tweak mode before trying to modifiy the action as doing
so will leave Blender in a semi-corrupted state.

Reviewers: #animation

Reviewed by: aligorith

Maniphest Tasks: T48397

Differential Revision: https://developer.blender.org/D2119

Fix T48663: The Soft Light blend type layer make the color darker in the
3D view

There was a misusage of the `outcol` and `texcol` params. The actual
formula should have been:

incol = facm * outcol + fact * ((one - outcol) * texcol * outcol +
outcol * scr);

To make sure the result is consistent with material mode, reuse the
material blend function (mix_soft), similarly to what most other texture
blend modes do.

Audaspace: fix incorrect parameter check in python API.

Found by PVS-Studio T48917

Cleanup: style

Cleanup: warning

fix atan2f input conditional

Suspicious conditional found by PVS-Studio T48917

Original code (from Blender?s initial open-source commit!) looks like
it?s testing inputs to atan2f, to avoid undefined function values.
Passing xn=0 does *not* always evaluate to 0 though? I?m not sure if
this is a coding error or was done for a desired visual result.

Also changed xn==0 to xn>=0 to avoid function call in more cases.

Good description and visualization of atan2f function:
http://en.cppreference.com/w/c/numeric/math/atan2

OpenSubdiv: Properly respect Subdivide UVs option

Fix crash using ID remapping on invalid ID pairs

Missing NULL checks caused crash in BKE_reportf formatting.

OpenSubdiv: Initial support of UV maps in material shading mode