Thanx Robert! I'll make like you said. P.S. Could you please tell me in what situation I should use CompositeViewer? Because as far as I got for opengl it's better to have one big window than two small windows? Roman
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: Thursday, December 11, 2008 4:07 PM To: OpenSceneGraph Users Subject: Re: [osg-users] RTT and stereo (corrected) HI Roman, As I send in my previous email you shouldn't use two separate views for what you are doing, it's neither conceptually a good fit, nor programatically. Use a single View with two slave Camaras, it's simpler coding wise, and you conceptually just have a single view, either though it's composed of two eye images. Lots has been discussed on this topic on osg-users in the past so please do a search for the topics of Camera / Viewer / CompositeViewer. Robert. On Thu, Dec 11, 2008 at 1:02 PM, Roman Grigoriev <[EMAIL PROTECTED]> wrote: > Thanx Robert! > I try to use this config: > CompositeViewer (2 View) > First View1 800*600 (left eye first DVI output) Left eye camera > Second View2 800*600 (right eye second DVI output) right eye camera > So I only need to execute > view1.setSceneData(root); > view2.setSceneData(root); > Roman > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Robert > Osfield > Sent: Thursday, December 11, 2008 2:58 PM > To: OpenSceneGraph Users > Subject: Re: [osg-users] RTT and stereo (corrected) > > Hi Roman, > > When doing stereo you would typically use a single View with a single > master Camera that controls the what the overall view of the scene is. > This View would then have two slave Cameras that are offset from the > master Camera's view/projection matrix to provide the appropriate > view. The scene graph is shared between the two slave Cameras. If > the slave Camera have different graphics contexts then you can have > separate OpenGL objects per context, but the OSG will automatically > manage this all for you, it also offers the opportunity for threading > the graphics contexts. > > Robert. > > On Thu, Dec 11, 2008 at 11:20 AM, Roman Grigoriev <[EMAIL PROTECTED]> > wrote: >>>When doing stereo with two 280's use two viewer Camera's to make the >>>most of multi-threading performance that the OSG has to offer. >> Could you please explain it? >> But if I have 2 views I have to share scenegraph between windows. So OSG >> simply duplicate geometries? >> Or maybe I don't understand something? >> Roman >> >> >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Robert >> Osfield >> Sent: Thursday, December 11, 2008 1:33 PM >> To: OpenSceneGraph Users >> Subject: Re: [osg-users] RTT and stereo (corrected) >> >> Hi Roman, >> >> The performance you are getting it not to surprising. Your GPU costs >> are obviously the biggest bottleneck. >> >> Moving to a single GTX280 will radically improve this, there is little >> reason why you shouldn't be able to do 60Hz in stereo. Using two >> GTX280 would give you an even wider margin for hitting a solid 60Hz. >> >> Once you move to the 280's you probably find that the GPU is no longer >> the bottleneck and your cull could well be the longest element, but if >> you're hitting a solid 60Hz in stereo already no need to worry. >> >> When doing stereo with two 280's use two viewer Camera's to make the >> most of multi-threading performance that the OSG has to offer. >> >> >> Robert. >> >> On Thu, Dec 11, 2008 at 9:41 AM, Roman Grigoriev <[EMAIL PROTECTED]> >> wrote: >>> Thanx Robert for your reply. >>> With single view I have 50 fps with stereo I have 25 fps. It is very >>> predictable result. >>> Event 0.05 >>> Update 1.36 (two Intersense InertiaCube3 sensors) >>> Cull 5.2 (clouds) >>> Draw 2.16 (ephemeris,clouds) >>> GPU 27.2 >>> I simply try to improve it. >>> I have single 8600GT. But for stereo config I will use double GTX280. >> Hopes >>> that It will change situation. >>> Bye >>> >>> >>> -----Original Message----- >>> From: [EMAIL PROTECTED] >>> [mailto:[EMAIL PROTECTED] On Behalf Of Robert >>> Osfield >>> Sent: Thursday, December 11, 2008 12:20 PM >>> To: OpenSceneGraph Users >>> Subject: Re: [osg-users] RTT and stereo (corrected) >>> >>> Hi Roman, >>> >>> On Thu, Dec 11, 2008 at 6:57 AM, Roman Grigoriev <[EMAIL PROTECTED]> >>> wrote: >>>> So for now I solve problem by doing all postprocess operations for left >>> and >>>> right eye and have huge frame drop to 25 fps L >>> >>> Stereo rendering normally incurrs a performacne hit, as you are >>> doubling the amount of work done. Is ther performance >>> disproportional? >>> >>>> Could someone please give me recommendations what is better render to > one >>>> big texture both left and right eye (1600*600) or render to two small >>>> textures (800*600)? >>> >>> Design wise it would be much easier to have one texture pure eye. >>> Performance wise it probably won't make too much difference as the >>> bottlenecks aren't likely to be related to setup of FBO's/teuxtures. >>> You "might" see a performance improvement with using a single texture, >>> but I doubt it would be worthwhile. >>> >>> I'd recommend looking at your wider performance bottlenecks. What is >>> your cull/draw costs? Due you have two graphics cards and a multi-core >>> GPU available? >>> >>> Robert. >>> _______________________________________________ >>> osg-users mailing list >>> [email protected] >>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >>> >>> >>> _______________________________________________ >>> osg-users mailing list >>> [email protected] >>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >>> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
