Maybe the scene isn't being rendered for human eyes. Wyatt
On 7/11/09, Paul Speed <[email protected]> wrote: > I have to be pedantic here... the eye can most _certainly_ detect > movement beyond 60 hz. But there is no point in displaying faster than > that if your display can't render faster than 60 hz. > > There are good reasons to do so, though. For example, to test rendering > speed to get good benchmarking for seeing how much CPU your rendering > code is wasting. Alternately, there are certain situations where one > may be driving sensing equipment that wants higher refresh. Of course, > then the display is expecting that refresh or whatever is receiving the > output... so we still come back to driving your display at what your > display expects. Or benchmarking. > > -Paul > > > Philip Taylor wrote: >> Wyatt, >> >> Out of very idle curiosity, why would you render at 2KHz when the eye >> can't >> really detect movement beyond 60Hz? >> Would it just be for rendering individual frames for a movie? >> >> PhilT >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]]on Behalf Of Wyatt >> Earp >> Sent: 11 July 2009 19:08 >> To: OpenSceneGraph Users >> Subject: Re: [osg-users] frame rate faster than monitor vsync? >> >> >> I have renderered in excess of 2 KHz on ocassion. >> >> Wyatt >> >> On 7/11/09, Ulrich Hertlein <[email protected]> wrote: >>> Hi Bob, >>> >>> On 10/7/09 9:05 PM, Bob Youmans wrote: >>>> Hi, does anyone know if it’s possible to run faster than the 60Hz vsync >>>> or 100Hz osg limit, if computational performance is the ultimate goal >>>> even at the expense of “tearing.” Can I get 600 fps by turning off vsync >>>> (or something else, it didn’t work on my box)? Is the graphics card >>>> driver/model involved? How can you tell which ones will work without >>>> actually buying it? >>> If you turn off vsync then OSG will render as fast as possible, without >> any >>> artificial >>> limitation. There's no 100 Hz OSG limit that I'm aware of except maybe >>> in >>> the DB pager. >>> >>> Sure you can get 600 fps if you're willing to accept tearing (or render >>> offscreen), even >>> my GeForce 8600M GT laptop gives me over 1000 fps for moderately complex >>> models. And yes, >>> the graphics card is obviously involved (the faster the better) and so is >>> the driver. >>> >>> If you're not seeing more than vsync fps then the reason is most likely >> due >>> to setup, e.g. >>> a driver settings forcing vsync on or __GL_SYNC_TO_VBLANK being set on >>> Linux. >>> >>> Cheers, >>> /ulrich >>> _______________________________________________ > > > _______________________________________________ > 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
