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Doubles or Floats?


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#1 Brannon   Members   -  Reputation: 122

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Posted 16 December 2001 - 02:04 PM

So, is one or the other faster as far as OpenGL goes? It seems like most samples and documentation use floats. For some reason, I want to use doubles.. but I don''t want to introduce an obscure perf problem that would be a pain in the ass to go back and change. -Brannon

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#2 Anonymous Poster_Anonymous Poster_*   Guests   -  Reputation:

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Posted 16 December 2001 - 03:11 PM

Depends on your architecture.

If you switch the FPU to 32bit mode and use floats, performance will always be better. And OpenGL uses floats internally, so I think it''s a good idea to stay with floats for the graphics engine.

Things might be different with a physics engine though, doubles may come in handy for the extended precision.


#3 Brannon   Members   -  Reputation: 122

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Posted 16 December 2001 - 03:18 PM

That''s exactly the info I was looking for.

thanks,

-Brannon




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