Re: A86: Drawing circles

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Drawing circles
From: Grams Family <grams@netcarrier.com>
Date: Mon, 03 Nov 1997 21:36:22
In-Reply-To: <Pine.LNX.3.95.971103091237.17140G-100000@S-98-47.resnet.oh io-state.edu>
References: <345D3F54.5263@minot.com>
Reply-To: assembly-86@lists.ticalc.org

At 09:14 AM 11/3/97 -0500, you wrote:
>On Sun, 2 Nov 1997, MrManson wrote:
>
>> Robby Gutmann wrote:
>> > 
>> > Is there an easier way to draw circles than using sprites?  if not, 
>> 
>> yeah use sine and cosine, gonna have to manipulate the values in the OPs
>
>Don't use sine and cos functions to draw circles.  It's slow, and not well
>suited to a bitmapped display.  Do a net search for "Bresenham" and
>"circle" and you will find lots of info on drawing circles on bitmapped
>displays.
>
As I recall, the Bresenham circle algorithm uses some multiplication, so it
might be a pain to write. _Definitely_ worth it though. If you do it right,
it can do ellipses too.

--Joshua

Follow-Ups:

Re: A86: Drawing circles

From: Butler Family <butler2@erols.com>

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Re: A86: Drawing circles

From: MrManson <joemama@minot.com>

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