Re: Fast atan2

• Subject: Re: Fast atan2
• From: Ben Weiss <email@hidden>
• Date: Tue, 18 Jan 2005 16:05:09 -0800
• Delivered-to: email@hidden
• Delivered-to: email@hidden

Try here:

http://www.shellandslate.com/computermath101.html

Ben

On Jan 18, 2005, at 3:56 PM, Robert Purves wrote:

Shark indicates that an important bottleneck in my app is
angle = atan2( y, x );
Does anyone know of a fast approximate atan2 algorithm (like those delightfully sleazy hacks for sqrt and its reciprocal)?
I don't need anything like full double, or even single, precision. An absolute error of 1e-4 would be acceptable.

Robert P.

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