Comments on: VR920 headtracking driver for Linux

By: New version of the vr920 headtracking driver coming soon | MyGNU.de

New version of the vr920 headtracking driver coming soon | MyGNU.de — Fri, 05 Nov 2010 01:30:01 +0000

[...] year I published the first version of my linux headtracking driver for the VR920 HMD here. Currently I am working on a new driver version which will have the following additional [...]

By: mithrandir

mithrandir — Tue, 07 Sep 2010 21:21:17 +0000

I tried flightgear in quad bufferred stereo mode with openscenegraph-2.8.2. This did not work (no stereo display and wrong graphics). (see comment 2 of http://www.mygnu.de/index.php/2010/03/flightgear-2-0-0-on-gentoo/ ). Anaglyph stereo works, but is not the right way for me, with a device like the vr920 there should be true stereo (export OSG_STEREO_MODE=QUAD_BUFFER fgfs), which fails with flightgear. From my experiences the bug should be in openscenegraph or flightgear. I have no idea where one could start to search for it. I don´t suspect the driver to be responsible for it, since I used quad bufferred stereo in some linux projects (with and without openscenegraph) and never had this problem. As I wrote, when flightgear works in stereo I´d like to implement the headtracking feature for flightgear. It should be straight forward, the same approach I used in SIV, my jps viewer. Get the data from the driver via the multicast socket and use it to rotate the osg camera. If you´re interested in how it works, look at the SIV source (VR920TrackingManipulator.cpp). A fake joystick driver can only give half of the experience. In my opinion the major problem of tracking technology is that there is no manufacturer independent interface (like we have for joysticks) for it, so an application has to support each tracking device seperately. But I also don´t have an idea where to start to bring such a standard on its way. Perhaps if others involved in tracking driver development read this and agree to work together on it, this could be the right way to start.

By: Dan Silva

Dan Silva — Mon, 06 Sep 2010 20:33:34 +0000

export OSG_STEREO_MODE=ANAGLYPHIC;export OSG_STEREO=ON

By: Dan Silva

Dan Silva — Mon, 06 Sep 2010 18:35:22 +0000

Congrats for the initiative and good work!
I’m thinking about how to make flightgear and vr920 come to an agreement (at least compromise) on:
- 3D stereo (I have no clue about this, where do I start? flight gear itself? openscenegraph? nvidia driver? xorg?)
- Head tracking (for this maybe writing a ‘fake joystick’ driver to receive the data your driver sends out…)

By: mithrandir

mithrandir — Mon, 30 Aug 2010 06:31:44 +0000

Nice, did the driver work for you? Are you building some special application with the vr920 on linux?

By: deviker

deviker — Sat, 17 Jul 2010 21:13:39 +0000

You made me want to buy one of those glasses.

Thank you

By: Gerhard Seckler

Gerhard Seckler — Thu, 16 Jul 2009 10:53:05 +0000

wow how cool that you have wrote here how to acess an VR920 videoeywear on linux. Respect …

By: MyGNU_Webmaster

MyGNU_Webmaster — Fri, 24 Apr 2009 08:24:46 +0000

I’m sorry for the inconvenience. Downloading works again.

By: Mikhail

Mikhail — Fri, 24 Apr 2009 03:57:35 +0000

Hi, Jürgen, I want to try your Linux driver, but link to sorce is not working now, some php errors apeared instead driver source.

By: SIV-1.0 released | MyGNU.de

SIV-1.0 released | MyGNU.de — Mon, 06 Apr 2009 19:48:58 +0000

[...] HMD. For this you will need (in addition to the device ) the headtracking driver, I published in VR920 headtracking driver for Linux. You may watch a video (demo_siv_headtracking_vr920) of me using the viewer with enabled [...]