Andy Ross wrote: > David Megginson wrote: > >>Jim Wilson writes: >> >>>Erik Hofman wrote: >>> >>>>Well, it spoiled the fun for me. FPS from 10-15 down to 1 fps :-( >>> >>>Hmmm...that seems a bit extreme. The model as a whole is a lot >>>more complex. >> >>It may be the textures -- on cards without lots of texture memory and >>AGP, big textures can make things grind to a halt very quickly. > > I think he's on an SGI O2, though, which don't have this issue. The > O2's have a "Unified Memory Architecture" with everything (main > memory, framebuffer, texture...) on the same memory bus. They > therefore can't get into a texture thrashing mode. It's funny, when
Correct, I can have up to 192 Mb of textures at the moment (either one texture of 192 Mb, or multiple textures with a total size of 192 Mb). > SGI did this in 1996 it was a huge advance. When intel tried it with > the i810 a few years later it was a junky low-cost part that no one > wanted. :) Hmm, Maybe it's just the way they do it which makes the difference (the O2 needs 10ns memory in banks of two (64-bit total), while the i810 had to use slower memory with a 32-bit data path. And the crossbar of the O2 can handle multiple requests from multiple sources at the same time! Erik _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
