-----Original Message-----
From: Gavin Maxwell [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, 15 January 2002 9:47 AM
To: Palm Developer Forum
Subject: RE: Drawing circle: example
> That looks identical to some code I sent to Paul Nevai back in July. From
> memory it worked quite well, albeit not highly optimised.
Actually I checked it visually before sending. :-)
Regarding optimisation: the actual mid-point part looks OK with one possible
improvement: don't use 4*x1 and 4*(x1-y1) all the way, calculate it once
before the loop:
delta1 = (x1<<2) + 6;
delta2 = ((x1-y1)<<2) + 10;
In loop:
p += delta1;
or
p += delta2;
Can we avoid using x+.. in plotcircle? I can't think of anything so far.
> Plotting arcs is still quite simple if you use the parametric elliptical
arc
> algorithm. If anyone is after source for this I have it somewhere.
Please, I am curious :-)
Michael
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/tech/support/forums/
