--- Vivian Meazza <[EMAIL PROTECTED]> schrieb: > Hi > > About 10 days ago I got fed up with low frame rates > using OSG around KSFO, > so I went out and bought the best nVidia AGP card > that I could find - 7600gs > with 512Mb of VRAM. I fitted it with great > anticipation to my machine - P4 > 2.8Ghz/800Mhz FSB with 1.5 Gb of RAM running XP - > and, precisely NOTHING. No > change in frame rate between the new card and the > old - a FX6200 with 256Mb > VRAM - for FG-OSG-HEAD. On the other hand plib-HEAD > flies. Here are some > comparative results: > > Aircraft: Seahawk > OSG > PLIB > KSFO General Ocean > KSFO General > Ocean > every check box turned to off: > 25 30 60 > 45 80 > 117 > with everything checked, traffic manager on: > 15 25 36 > 25 50 > 80 > as above with shadows and 3d clouds: > > 18 40 > 65 > as above but with trees and precipitation: > 10 15 40 (but the rain > turned itself off!) > > Aircraft: c172p > every check box turned to off: > 33 40 60 > 45 90 > 130 > with everything checked, traffic manager on: > 27 33 40 > 30 50 > 75 > as above with shadows and 3d clouds: > > 30 50 > 65 > as above but with trees and precipitation: > 15 25 30 > > Aircraft: Buccaneer (particles) > as above but with trees and precipitation: > 8 18 20 > > In addition to the difference in frame rate, OSG > also stutters, while plib > is commendably smooth. I've tried both executables > generated here using > MSVC8, and Fred's pre-cooked binaries. So far as I > can see the results are > identical. I've profiled both OSG and plib - for > anyone interested, some of > the results are here: > > ftp://abbeytheatre2.org.uk/fgfs/OSG/ > > While I am no expert in profiling code, the results > seem to me to show that > we are getting stuck in the bowels of OSG somewhere, > while plib is > well-ordered, with no particular cpu-hog, which is > pretty much what the > above table indicates. > > My principle concern is that there appears to be > very little headroom for > future developments in OSG for shadows, or 3d > clouds, or landing lights, on > what is a not-very-old and pretty capable machine. I > would be grateful if > some Windows user(s) could confirm at least the > shape of these comparative > results. I understand that Linux users get much > better results than these. > We might be getting towards the point when Windows > users are stuck with plib > (and that's not all bad) while Linux users get to > play with all the new > goodies. We might be drifting away from our cross > platform ethic. > > > Vivian > > Luckily the new card wasn't terribly expensive > otherwise I would be quite > p'd off > Hi,
With the recent built by Fred I found the old stutters again- but I could sovle this for me. But I can't see any of those problems you have- I can run FGFS with all features we have - plus heavy self-written interactive traffic and mp. And the best- I can run other programs beside too without any problems (blender as an graphic example!) You should know, that you have to set some things on your pc, Nvidea and FGFS: - switch Vsync in the Nvidea settings - use the frame-rate-throttle! I use a CoreDuo 2,6 Ghz and a Gainward 8800GT - but there were people in the german forum and the official forum (kid's playground) having no problems with the recent OSG-built on lower pc. And the difference between a 8800 and 7600 isn't really far. Even on my old PC with a FX5200 OSG run very pretty at least. It is true that OSG is slower than plib- but the graphic is much better (exxept the 3D-clouds and the missing shadows)- please not another discussion about OSG vs Plib! Regards HHS still in work: http://www.hoerbird.net/galerie.html But already done: http://www.hoerbird.net/reisen.html E-Mails jetzt auf Ihrem Handy. www.yahoo.de/go ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
