>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>On Behalf Of Lee Marshall
>Sent: 22 July 2007 20:09
>To: piclist@mit.edu
>Subject: [OT] Mathematics - line drawing
>
>
>
>hi, i want to work with graphic lcds, but i am unsure about 
>how to calculate what pixels are switched on when a line is drawn.
>
>i am guessing there is some algorithm for calculating what 
>pixels are turned on, if a line must be drawn from 0,3 to 4,6 
>or something.
>
>can anyone tell me about this process...
>-- 

Point Google to "Bresenham line algorithm" and you should have more information than you could ever need.  e.g.

http://en.wikipedia.org/wiki/Bresenham's_line_algorithm

This is a simple algorithm that avoids any multiplication or division, so runs quickly on small micros.  Bresenham also developed a circle drawing algorithm that might be useful to to you.

Regards

Mike

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