64,000 tri surface?
Blitz3D Forums/Blitz3D Programming/64,000 tri surface?
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| What's the limit to the number of tris in a surface with a GEforce2 GTS? My program seems to be falling over at above 64,000 - is this a limit of the card? Can I get around it by splitting into multiple surfaces? |
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| yes, it's the max, but wait, it's a 64k limit ($ffff or maybe a couple less) for vertices. So if you use shared vertices, you may get about the same amount of tris under circumstances. AFAIK this is a DirectX limit. The MAV happens only if you call renderworld with such a big mesh, but even when you have more then $ffff Vertices and then weld it and lower the number to smoething under $ffff, some artifacts are still left, some Vertices will forget their positions or something. Yes, I guess the only solution is to split the surfaces up to fragments. Funny, once again a microsoft 64k limit that was hitten earlier than billy boy expected to do so. |
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| Ha ha! Damn Gates to hell - I wish PowerPCs or RiscPCs ruled the roost but it will never happen. Thanks for the response - I can get around the problem by splitting the surface but the frame rate will be poor so I'm going to try optimising my mesh a bit. |
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| not sure whether its a problem on a newer API though. Lightwave couldn't have more than 64k polys in a model either not that long ago. same with 3ds files and many others. |
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| It's a DX thing. And Blitz stores vertex indices as words. |
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| 3DS files have a 32k Triangle per mesh restriction. It is a DX and hardware thing. On my old system ( GF4 440go ) I had this 64k restriction as well. But with my new Radeon Mobility 9700 this border is far higher. But that isn't of much use as I want to have others playing my games as well :) It is only usefull to test the power of a terrain system for example. |
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| " 3DS files have a 32k Triangle per mesh" I'd like to be sure on this point... Organica (coolfun.com) modeller had a limit in exporting 3ds files of 65k tris, said it was imposed mainly by the *.3ds design... |
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| I was creating the surface in Blitz, so file limits aren't the problem - or not the whole problem at least. |
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| Bob: Sure that it are 64k Tris and not 64k Vertices? |
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