Blender Git Loki

Use modelview matrix from OpenHMD, get custom IPD to work

Also renamed interocular distance to IPD in UI (slightly different things), removed unused matrix getters and made sure enabling/disabling custom IPD behaves nicely. Note that both projection and modelview matrices from OpenHMD get the Blender equivalents applied on top, so they act as relative transformations. Rotating, zooming and panning in HMD view works properly too now.

Always use projection matrix from OpenHMD

Was previously only used while in camera view.
Right now, you can't zoom during HMD session, should be fixable though. Custom interocular distance and optional HMD rotation don't work now either, need to check if we want to keep them.

Fix disabling lens distortion shader causing OpenGL shader error

Also cleanup.

Use center as pivot for rotating views, avoid passing around arg

Fix warning without WITH_INPUT_HMD

Make HMD IPD work properly with Multi-view format

Toggle into scene camera when opening HMD window

Fix crashes with HMD view in scenes without camera

Init proper default settings when creating new scene

Fix checkbox for getting IPD from device always disabled while no HMD session runs

Refactor HMD->Camera relation, avoid low-level call

Show info in tooltip on why HMD session can't be started

Move interocular distance settings out of camera data

These aren't just for the camera, but for entire HMD session.

Move HMD view settings into own scene level struct

For some reason I placed this in RenderData earlier.

HMD view doesn't require own multiview mode anymore

HMD view buttons and options are always visible in "Views" panel now (Properties Editor -> Render Layers context).

Return info in tooltip on why IPD button is disabled

Merge branch 'master' into HMD_viewport

Conflicts:
source/blender/blenloader/intern/versioning_270.c
source/blender/editors/interface/resources.c

Merge branch 'master' into HMD_viewport

Conflicts:
intern/ghost/intern/GHOST_System.cpp
intern/ghost/intern/GHOST_System.h
source/blender/blenkernel/BKE_blender_version.h
source/blender/blenloader/CMakeLists.txt
source/blender/blenloader/intern/versioning_270.c
source/blender/windowmanager/CMakeLists.txt
source/blender/windowmanager/intern/wm_window.c
source/blenderplayer/bad_level_call_stubs/CMakeLists.txt

Fix non-HMD window not drawing viewport in camera view

Also added WITH_INPUT_HMD checks

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