On Tuesday 21 January 2003 1:09 pm, David Chase wrote:
> At 02:39 AM 1/21/2003 +0500, Nickolay Semyonov-Kolchin wrote:
> >Speed and accuracy are different things. Matlab class software need
> > accuracy, most computer games need speed. This is the reason of
> > "-ffast-math" key in gcc. Ocaml lacks such key, and always produce
> > ineffecient floating-point code.
>
> But how much accuracy do computer games need?  First-class implementations
> of sin/cos in software are quite fast, indeed faster (in certain
> non-trivial ranges) than the hardware itself.  If it happens that you could
> determine how *little* accuracy you actually need, it could go faster yet
> :-).

If only a few significant figures are of interest to you then you could use 
lookup tables, no?  How would the lookup overhead compare with the actual 
computation time?

D

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