Path: chuka.playstation.co.uk!news
From: "Miles Buzzing" <miles@guildfrd.demon.co.uk>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: Yaroze built in look-up tables
Date: 30 Dec 1998 14:56:10 GMT
Organization: PlayStation Net Yaroze (SCEE)
Lines: 18
Message-ID: <01be3404$96627120$0a3ddec2@guildfoc>
References: <76d2on$qsh3@chuka.playstation.co.uk>
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Nathan - 

All the main trig functions calculate their results at run time. They
wouldn't be able to achieve the necessary precision without using huge
lookup tables. As a result they're all slow as s**t.

Of course we're all games programmers so we need speed not precision; hence
the prolific use of home-made lookup tables and fixed point on NY. 

- Miles



Nathan Miller <millerbosnia@hotmail.com> wrote in article
<76d2on$qsh3@chuka.playstation.co.uk>...
> Does anyone know if the sine and cosine functions just return a lookup
table
> value or if they actually calculate the return value everytime