Blender Git Loki

Cycles: Tweak curve segment (un)pack to handle more curve segments

There was 16 bits reserved for primitive type, while we only need 4.

Reviewers: brecht

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D2401

Usual UI messages/i18n fixes/tweaks.

Fix T50243: libmv_panography_test is broken

There was fully wrong logic in comparison: was actually accessing memory
past the array boundary. Run test manually and the figure seems correct
to me now.

Spotted by @LazyDodo, thanks!

OpenGL fixes

- mixing of old & new APIs
- vertex format mismatch

fix for constraint loop detection (meshislands indirectly connected by a loop should get the same constraint index now)

limit the collision check to objects which are actually constrained (whether disabled or not)

additionally take value of "disable collisions flag" into account, omit check if constrainted objects shall collide

hrm forgot something in last commit

further attempt to suppress "unnecessary" collisions when constraints are intact

OpenGL: another way to set uniform theme color

OpenGL: finish area action zone todo

Replace outlined circle (24 vertices) with a point sprite (1 vertex).

Replace one todo with another todo.

small fix for previous commit

OpenGL: new immediate mode in area.c

D2361 by @punya, part of T49043

Small cleanup: Remove unused code

This code has not been used for a long time if not ever.
Most of the code was removed in rB1d3609262704f88c9e30b2cebdb236110b25cdc9
however, this was forgoten.

optimization attempt to suppress collisions among partially constrained objects

UI: Externally open file and path from context menu

Adds two buttons to context (RMB) menu of path buttons:
* "Open File Externally" to open a file in an external app (only visible if path contains a filename)
* "Open Location Externally" to open a path in an external file browser

The functionallity for this was already there, just hidden behind Shift/Alt click of file_browse button (folder icon next to path button).

Fix strict warnings on Windows

Merge remote-tracking branch 'origin/blender2.8' into render-layers

plus manual rna fixup

fix for rotational and splinter (with splitshards) issues in dynamic fracture

Fix strict compiler error when building without bullet

Libmv: Fix typo in assert message