We had similar issues with terrain recently. On windows it was single digit framerates and the same database on Linux was 30 fps but %100 on 2 cores. Rebuilding our terrain without the -terrain flag solved the issue. Framerates on windows jumped up to 30 fps, Linux to 60 fps with %30 on 1 core. We tried this with several databases and the ones without -terrain always performed better.
Ken From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC Sent: Thursday, August 14, 2008 1:07 PM To: [email protected] Subject: [osg-users] osgdem performance... I would like to get some feedback from users that might be rendering OSG terrain built with osgdem on Windows XP. Based on previous discussions, I understand that the terrain rendering on Windows does not have as good of performance as on Linux, however, I'm seeing abysmal frame rates when I'm rendering terrain on Windows. The paging performance is horrible. Perhaps it's the way I'm constructing my terrain or the setup in my OSG app...I'm not sure. While I don't understand the algorithm that is being used for OSG terrain, I would expect it to perform as good or somewhat close to other Windows based earth viewers such as NASA's WorldWind which seems to run just fine on Windows with large databases. For the record, here's the osgdem command I'm using to build the terrain... osgdem -TERRAIN -PagedLOD -geocentric -t dted -d texture -l 10 -o terrain/wasatch_utm.ive Any input on the matter would be appreciated... -Shayne
_______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
