Re: [osg-users] Stereo : Meaning of field sequential, I-visor
Hi All, I recover al old thread... I'm trying to use the stereo setup with the same settings you mentioned, both with the Vuzix HMD, and with the eMagin Z-800 (http://www.3dvisor.com) I have a Quadro FX 3700 as graphics HW. Unfortunately, I can only see the image flickering because of the switch between the right and left images, but no way to address the 2 different frames to the HMD right/left channels. Which settings might be wrong? On the nVidia Panel I tried all of the combination among: ** Force stereo shuttering ** Stereo - Enable ** Stereo - Swap Eyes settings, always using the --stereo QUAD_BUFFER option on osgViewer. Is there any dependency with the multiple display setup? I tried the clone and Dual View options, but still no luck... Thank you on advance for any suggestion! Cheers_ricky On 14/11/2008 16.14, David Spilling wrote: Thanks for the help. That all worked, more or less out-of-the-box, using QUAD_BUFFER. As suggested, we had to enable stereo in the OpenGL driver. I was slightly misinformed about the actual hardware, what we are actually using is this : http://www.vuzix.com/iwear/products_vr920.html, which also uses a field sequential sort of stereo. LIke I said though, all works OK. Out of curiosity, in a couple of our apps we set various features of the views e.g. window sizes (via graphics context traits), projection matrix resize policy and so on. For anaglyphic stereo mode, this was all fine, but in quad buffer, we got lots of OpenGL warnings. Turning a big set of methods off fixed them in the short term, but lost some functionality; in the long term we'd like to fix this.Are there things that one shouldn't do in quad_buffer that are OK in other stereo modes? David ___ 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
[osg-users] Stereo : Meaning of field sequential, I-visor
Dear All, I'm a bit new to stereo modes (so take pity on me), but are any of the OSG supported stereo modes (QUAD_BUFFER, *_INTERLACE, *_SPLIT, *_EYE, ANAGLYPHIC) the same thing as field sequential? I guess I know that the interlace/split/anaglyphic ones are out, but I was not sure what quad_buffer actually supported... Has anybody tried to get these things ( http://www.personaldisplay.com/content/fmds/fmd_sub02_01.asp, and related models) working with OSG? Thanks in advance, David ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Stereo : Meaning of field sequential, I-visor
Hi David, Dear All, I'm a bit new to stereo modes (so take pity on me), but are any of the OSG supported stereo modes (QUAD_BUFFER, *_INTERLACE, *_SPLIT, *_EYE, ANAGLYPHIC) the same thing as field sequential? I guess I know that the interlace/split/anaglyphic ones are out, but I was not sure what quad_buffer actually supported... Field-sequential stereo means that the frames are sent in a time-multiplexed manner - i.e. first left image, then right image, then left image, then right image, etc. This is typically used with shutter glasses, with an extra wire to synchronize them. OSG supports this mode using the QUAD_BUFFER mode. However, to have this work you need a graphic card and driver that support it - that is typically something from the nVidia Quadro range or ATI FireGL. The consumer hardware (GeForce, Radeon) has it disabled and typically lack the extra mini DIN synchronization connector (three pin, round connector, similar to the old PS/2 mouse connector). nVidia has something called consumer stereo driver for GeForce that will generate frame-sequential stereo imagery by intercepting the DirectX/OpenGL pipeline, moving the camera and rendering each frame twice for you, however I cannot recommend it. It is incredibly difficult to get to work (the Windows- only drivers work only with specific versions of ForceWare in Windows, usually very old ones that do not support current hardware), it is unstable and you have little control over the stereo settings. Also, it doesn't actually give you QUAD_BUFFER support, so you need to render normally and pray that the driver does its magic and you get a somewhat correct stereo output. Has anybody tried to get these things ( http://www.personaldisplay.com/content/fmds/fmd_sub02_01.asp, and related models) working with OSG? That should be pretty easy to get working with a Quadro, set to synchronize via the DDC pin on the VGA connector. Set OSG to QUAD_BUFFER mode and off you go. Unfortunately, what they do not tell you in their sales pitch is that you need at least one of the high-end Quadros (about 800 USD+ investment for the cheapest one) to have this to work - the lower end stuff doesn't support stereo ... The FX605 seems to be a better option - it takes two VGA inputs where you feed both images in parallel (HORIZONTAL_SPLIT or VERTICAL_SPLIT OSG mode). That you can feed with any graphic card with two VGA outputs, even an old GeForce will do. This way of feeding the HMD is common on the higher-end hardware as well, in case you would like to upgrade later. Regards, Jan signature.asc Description: This is a digitally signed message part. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Stereo : Meaning of field sequential, I-visor
Jan, Thanks for the very informative reply. Unfortunately, what they do not tell you in their sales pitch is that you need at least one of the high-end Quadros (about 800 USD+ investment for the cheapest one) to have this to work - the lower end stuff doesn't support stereo ... We have it on a Quadro (Quadro FX 2500M); hence just running quad_buffer should work? David ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Stereo : Meaning of field sequential, I-visor
Le vendredi 14 novembre 2008 à 13:20 +, David Spilling a écrit : Jan, Thanks for the very informative reply. Unfortunately, what they do not tell you in their sales pitch is that you need at least one of the high-end Quadros (about 800 USD+ investment for the cheapest one) to have this to work - the lower end stuff doesn't support stereo ... We have it on a Quadro (Quadro FX 2500M); hence just running quad_buffer should work? David Yes it's working out of shell with osgviewer, setting it in stereo mode: OSG_STEREO=ON OSG_STEREO_MODE=QUAD_BUFFER You may also need to activate de quad buffer rendering of your quadro in the advance settings (or stereo rendering may be, can't remember the exact name...) Pierre. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Pierre BOURDIN I.M.E.R.I.R. Av. Pascot BP 90443 66004 PERPIGNAN tél: 04 68 56 80 18 fax: 04 68 55 03 86 email: [EMAIL PROTECTED] ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Stereo : Meaning of field sequential, I-visor
Jan, Thanks for the very informative reply. Welcome. Unfortunately, what they do not tell you in their sales pitch is that you need at least one of the high-end Quadros (about 800 USD+ investment for the cheapest one) to have this to work - the lower end stuff doesn't support stereo ... We have it on a Quadro (Quadro FX 2500M); hence just running quad_buffer should work? If that card supports stereo (can't find it on the web site), then yes. Don't forget to turn on the stereo support in the driver settings (in the nVidia control panel on Windows, in xorg.conf on Linux) first, though - otherwise you will get an OpenGL error when you try to use an unsupported feature. Regards, Jan signature.asc Description: This is a digitally signed message part. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Stereo : Meaning of field sequential, I-visor
Thanks for the help. That all worked, more or less out-of-the-box, using QUAD_BUFFER. As suggested, we had to enable stereo in the OpenGL driver. I was slightly misinformed about the actual hardware, what we are actually using is this : http://www.vuzix.com/iwear/products_vr920.html, which also uses a field sequential sort of stereo. LIke I said though, all works OK. Out of curiosity, in a couple of our apps we set various features of the views e.g. window sizes (via graphics context traits), projection matrix resize policy and so on. For anaglyphic stereo mode, this was all fine, but in quad buffer, we got lots of OpenGL warnings. Turning a big set of methods off fixed them in the short term, but lost some functionality; in the long term we'd like to fix this.Are there things that one shouldn't do in quad_buffer that are OK in other stereo modes? David ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
