2009/5/26 Jan Ciger <jan.ci...@gmail.com> > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Himar Carmona wrote: > > Our impressions: > > > > Though the glasses are "VESA compatible", the ir emitter doesn't > > work if it isn't connected to the pc via USB AND a DirectX application > > is running fullscreen. > > The ir emitter does not use the sync in signal if it is connected to > > a "3d ready" display (either samsung 120Hz lcd and DepthQ projector). It > > seems to prioritize the usb signal in these cases. > > Isn't the USB connection used just to get the power for the signal > converter? The stereo sync signal is normally emitted on the VGA > connector directly. >
Don't know exactly how it works, but for sure the ir emitter use the USB connection also for data. In a "normal" configuration (i.e. without using the sync in plug), the ir emitter is connected to the pc only by the usb cable and does not need to be plugged to the VGA connector. So, i deduce that if it receives the DDC signal, then it is the driver that enroute that signal. I also suppose that it uses some sync protocol different than a simply square wave. > > That it doesn't work right with the displays you mention could be due to > the fact that they use the DDC signal for the original purpose - > communicating the monitor properties to the PC and - and therefore would > interfere with the stereo sync. > Working on windows, when you install the 3d vision driver, it installs a new group of options in the nvidia control panel to configure the stereoscopic display. It have a setup wizard and a test application to help in the process. If the graphic card detects a "3d ready" monitor (like the lcd samsung at 120Hz or the DepthQ projector), it disables the option to select generic crt display and hdtv dlp. And the only configuration possible that i found was to tell the driver to use one of these. In these cases, if you run the test appication, it tells you with an onscreen message that it does not detect the sync signal, so it forces you to connect via vga 3 connector's sync in plug. So, i supposed that: 1. if the graphics card is connected to a 3d ready display, the ir emitter will receive the sync via usb. 2. (else) if the driver is configured with a crt or dlp, the it will use the external sync in signal (another plug in the ir emitter). With the vertical sync of the vga connector injected through this plug (with the circuitry i mentioned in my post) and the driver configured as 2, the glasses works like a (VESA compatible?) ones. Notice also that we use 2 pcs: one with the quadro and osg installed (and without 3d vision driver, because they don't install for a quadro card), and the other with the vision driver and the ir emitter plugged. If you plug the ir emitter without installing the drivers it doesn't work (blinks red), so i can't plug it in the first pc. I don't know other stereoscopic systems (glasses + ir emitters), how they work or how they are configured. This ones seems to be tightly integrated with the software drivers. Regards, Himar. > > Regards, > > Jan > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (GNU/Linux) > Comment: Using GnuPG with Mandriva - http://enigmail.mozdev.org > > iD8DBQFKG8tbn11XseNj94gRAsX2AKCXY57SRXgaNn8pWz+NPxHgcCfVdwCfXNwx > RaKlxS06CKxziKwquvKpw5k= > =25NN > -----END PGP SIGNATURE----- > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
_______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
