Blender Git Loki

Cleanup: quiet warning

GWN: Fix ubo debug printf

GWN: Fix attrib arrays giving incorrect name depending on the platform.

It seems that some opengl implementations are returning "[0]" after array names but some others dont.

Remove the "[0]" so everything is consistent.

Merge branch 'master' into blender2.8

Code cleanup: simplify switch statement, ensure we catch missing enums.

Fix T54073: crash and uninitialized memory in Cycles displacement hashing.

Fix crash reading deg_point_cache_transform.blend test, saved with 2.8.

In general 2.8 files may not be readable in master, but might as well fix
this case so all the lib/tests can be opened still.

Cleanup: Remove debug-only code

Fix T54076: MCE in Graph mode - clip.graph_select_border does not work by header menu

While the script should be using INVOKE_PREVIEW for operators in clip view,
window manager was lacking some switch statements.

Thanks Brecht fore review!

Merge branch 'master' into blender2.8

Cleanup: rename BLI_thread.h API

- Use BLI_threadpool_ prefix for (deprecated)
thread/listbase API.
- Use BLI_thread as prefix for other functions.

See P614 to apply instead of manually resolving conflicts.

Merge branch 'master' into blender2.8

Cleanup: use '_len' instead of '_size' w/ BLI API

- When returning the number of items in a collection use BLI_*_len()
- Keep _size() for size in bytes.
- Keep _count() for data structures that don't store length
(hint this isn't a simple getter).

See P611 to apply instead of manually resolving conflicts.

Cleanup: Style, braces with macros

See https://wiki.blender.org/index.php/Dev:Doc/Code_Style#Braces_with_Macros

Cleanup: Remove BLI_ prefix from listbase macro

This is kind of doesn't matter where macro itself is defined.

We should stick to the following:

- If some macro is actually more an inline function, follow regular
function name conventions.
- If macro is a macro, type it in capitals. Use module prefix if that
helps readability or it if helps avoiding accidents.

Merge branch 'master' into blender2.8

Simple hair children: Make twist affected by texture

This completes twist feature, which is now possible to also control by
texture. Since textures can not easily contain negative values as well,
same trick with 0.5 neutral as vertex groups is used.

All in all, this twist features allows to do following things.

Original hair:

{F2287535}

Hair with scientifically calculated twist value of 0.5:

{F2287540}

And we can also twist braids in opposite directions dependent on left/right
side:

{F2287548}

Fix T54078: Adding subsurf prior to particle system breaks simple children vgroups and textures

cpa->num points to a face index on BASE mesh, but get_child_modifier_parameters()
expects index on a FINAL dm. So wrong index was used here.

Simple hair children: Make twist affected by vertex group

The idea is to give a control over direction of twist, and maybe amount of
twist as well. More concrete example: make braids on left and right side of
character head to be twisting opposite directions.

Now, tricky part: we need some negative values to flip direction, but weights
can not be negative. So we use same trick as displacement map and tangent normal
maps, where 0.5 is neutral, values below 0.5 are considered negative and values
above 0.5 are considered positive.

Simple hair children: Initial implementation of twist control

It allows to have children hair to be twisted around parent curve, which is
quite an essential feature when creating hair braids.

There are currently two controls:

- Number of turns around parent children.
- Influence curve, which allows to modify "twistness" along the strand.