Ron Jensen wrote: > On Sat, 2008-10-11 at 17:41 -0500, Jon Elson wrote: > >> There are a couple issues left. One is a wide disparity of frame >> rates. When loading the A-10 aircraft, I get about 7 FPS over water, 5 >> FPS looking at scenery in the default SFO area. I also get occasional >> very jerky frame rates that look a lot worse than 5 FPS. But, with the >> T38, I get 28 FPS most of the time, which is perfectly acceptable, and I >> don't seem to notice those jerky moments, either. >> >> I am using the --disable-clouds command, and have renamed the >> Textures.high directory to keep fgfs from using that (recommended by a >> post on the group). I have a 64 MB Nvidia GeForce4 MX440. >> So, any ideas why the A-10 has such terrible frame rates, and the T38 is >> fine? Is it the instrument panel? >> > > The A10 has huge texture requirements, and lots and lots of polygons... > a 64 MB MX440 probably isn't enough card to run it well. > > >> I switched to the 2D panel (which is pretty unusable) but it seems to >> make no difference in frame rate. >> > > The 2D panel just overlays the 3D panel. > > The T-38, on the other hand is pretty light weight polygon model with > few textures. > > By way of comparison, in my tree at least, the A-10 has 87 texture files > and most seem to be 512x512. The T38 has 14 texture files with an > average size of 256x256. A pretty significant difference. > > >> All the above frame rates are in full-screen 1280 x 1024 mode. The >> default frame size runs slightly faster, maybe 10-12 FPS with the A-10, >> but still choppy. >> > > The chop is probably your card trying to deal with paging memory. > > >> One other quirk I noticed is if I got to full screen during the splash >> display, everything is OK. If I wait until the FGFS display has >> started, it takes a LONG time for the full-screen display to rebuild, >> and the frame rate is roughly 1-2 frames per MINUTE! Once FGFS has >> started, any change to the screen display mode causes this extreme >> slowdown. Anyone else ever seen this? >> >> > That's a new one on me... > > I experienced that quirk myself with Nvidia Geforce 4 TI4200 (64MB AGP) Later I switched to a GeForce 7300 LE on e PCI-E and that dissapeared. > Good luck, > > Ron > > Greetings,
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