Re: [Flightgear-devel] Scenery files triangles
On 13 Jul 2005, at 15:36, Andy Ross wrote:These days, it's usually faster to use indexed vertices. Strips and fans are faster because they reduce the number of vertices that need to be transformed by (and sent to) the hardware by "saving" 1 or 2 from the last triangle drawn. But modern cards have vertex caches that are much (!) larger than 1 or 2 entries. If someone wants to change the terrain format, I'd suggest trying indexed vertices first -- it's simpler, too. Whilst wishing to avoid a 'me too' post, I fully agree with this; writing a strip-ifier is a complex job, storing each tile as several, or maybe even one vertex array with indices is easier to generate, involves fewer SSG nodes, and is easier for drivers to optimise on the card, than either fans or strips.James___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Scenery files triangles
Harald JOHNSEN wrote: > Is there a reason why we are using fans and not strips for tile > objects ? These days, it's usually faster to use indexed vertices. Strips and fans are faster because they reduce the number of vertices that need to be transformed by (and sent to) the hardware by "saving" 1 or 2 from the last triangle drawn. But modern cards have vertex caches that are much (!) larger than 1 or 2 entries. If someone wants to change the terrain format, I'd suggest trying indexed vertices first -- it's simpler, too. Andy ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Scenery files triangles
Erik Hofman wrote: Harald JOHNSEN wrote: Is there a reason why we are using fans and not strips for tile objects ? http://baron.flightgear.org/pipermail/terragear-devel/2005-June/001219.html Erik lol ok, I didn't saw that ;) Harald. ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Scenery files triangles
Harald JOHNSEN wrote: Is there a reason why we are using fans and not strips for tile objects ? http://baron.flightgear.org/pipermail/terragear-devel/2005-June/001219.html Erik ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
