Newsgroups: comp.lang.c
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!hobbes.physics.uiowa.edu!news.iastate.edu!sharkey!tygra!dave
From: dave@tygra.Michigan.COM (David Conrad)
Subject: Re: Help w/Plotting a circle...
Organization: CAT-TALK Conferencing System, Detroit, MI
Date: Fri, 14 Jun 91 07:08:22 GMT
Message-ID: <1991Jun14.070822.11322@tygra.Michigan.COM>
References: <1991Jun11.154335.130@sugaree.uu.net>

In article <1991Jun11.154335.130@sugaree.uu.net> bill@sugaree.uu.net (William Bishop) writes:
>Hi,
>
>Does anyone out there have an algorithim for plotting the points
>of a circle.   Any all all help is appreciated.  Thanks!
>

I hear some guy named Bresenham has a pretty good one....
Seriously, look up the Bresenham Circle Drawing Algorithm, probably in
Knuth (God knows everything else is), as well as many other places.
I believe that Michael Abrash worked up an implementation in his
On Graphics column in Programmer's Journal a while back (sorry I can't
give a full citation), and Abrash also has a book out called Power
Graphics Programming, but it is completely IBM-PC EGA/VGA oriented.
Just don't use trig.  :-)
--
David R. Conrad
dave@michigan.com
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