Blender Git Loki

Undo accidental change

Viewport HMD integration using OpenHMD

= Viewport HMD integration using OpenHMD =

This adds initial support for controlling the viewport view using a head mounted display (HMD).

To use it, go to the Properties Editor, Render Layers context. Enable Views, select "HMD View". You can then open a new HMD Window from there and start a HMD session.

**TODOs:**
* Move HMD options to a better place, they are not Render Layer related (Maybe properties region?)
* Zoom and pan don't work in HMD window while in camera view
* View streched vertically in HMD window while not in camera view
* TODOs/XXXs marked in code (esp. WM_ calls in BKE_)
* Apply D1350 for better mouse interaction while in HMD view

Reviewers: sergey, dfelinto

Differential Revision: https://developer.blender.org/D2133

Update/correct version patching

Fixes for WITH_OPENHMD and WITH_INPUT_HMD options

And cleanup.

Cleanup: Undo whitespace changes, comments, etc

Merge branch 'master' into HMD_viewport

Adjust opening position and size of HMD window

Fix streched viewport in camera view

Various cleanup

Cleanup: Use 4x4 matrices, naming, compiler hints, use API function

Merge branch 'master' into HMD_viewport

Conflicts:
intern/ghost/intern/GHOST_System.h
source/blender/blenkernel/intern/camera.c
source/blender/blenkernel/intern/screen.c
source/blender/editors/space_view3d/drawobject.c
source/blender/editors/space_view3d/space_view3d.c

Reset writefile.c to earlier state to avoid merge hell

Was caused by whitespace auto-cleaning.

Fix linking with Blenderplayer enabled

Implemented initial support for using HMD projection matrices in blender viewport.
Also did some general cleaning

Always use parallel convergence in HMD mode

Previously it was just using whatever was set in non-HMD mode.
I guess using parallel convergence for usage with HMDs is correct, could be wrong though ;)

Only allow using Device IPD if it's available

Don't display "Set Stereo 3D" button for HMD mode

Fixed locks when opening/closing HMD sessions
Spaces to Tabs

Merge branch 'HMD_viewport' of git.blender.org:blender into HMD_viewport

Make branch compile with blenderplayer