Le mercredi 22 juin 2005 à 10:25 -0500, Curtis L. Olson a écrit : > Alberico, James F wrote: > > >For what it's worth, additional info on this thread: > > > >I saw the same bad performance on an Fx 3400 with new driver. I was not > >able to find any properties or run options to alleviate the problem (10 > >fps or less, when looking at an airfield -- running with enhanced > >lighting OFF). > > > >Gerard's fix (comment out the call to get_vasi_lights_root()) worked > >great. All is smooth now. Thanks, Gerard! > > > > > > A better fix might be to use point lights for VASI/PAPI rather than > commenting them out entirely. > > Here's my theory. VASI/PAPI and the approach lighting "rabbit" get > drawn with larger antialiased points. These are "unaccelerated" for the > gamer level hardware (i.e. GeForce) but I found in the earlier versions > of the cards/drivers that you could easily get away with just drawing a > few larger "software" points and not see any kind of performance hit at > all ... as long as you didn't get too crazy with it. > > Now, nvidia does offer a hardware accelerated version of these points in > it's more expensive quadro line of cards intended for the "professional" > graphics market. > > I suspect that they are intentionally making antialiased points > artificially slow in their latest drivers to prevent people like us from > getting away with using just a few here and there without upgrading to > really high priced Quadro cards. > > I could be wrong ... maybe there's a valid technical reason, but this > sounds more like a "marketing" thing than a driver bug from my perspective. > > Curt. > Thank Curt that explanation , is the good one.
The question is what could be done on the fg side ? in order to keep the best speed in every usage of NVidia cards. The card with old driver in FG gives an average speed from 30 to 70 fps The card without overclock with new driver in FG an average from 50 to 90 fps (sometime more than 100 fps). The card with overclock less than 10% more (~8) With Celestia-KDE speed seem to be twice When we have to use the very NVidia last driver,(and not to buy a new more expensive card) what can be done ? -- Gerard _______________________________________________ Flightgear-devel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
