Until now I used Maple for 2D and Povray for 3D images and animations to 
put them on my mathematical website. But I find that using Povray for 2D 
applications gives nicer images and offers more possibilities.

The "quadratrix" is a famous curve that plays a historical role in the 
problem of the trisection of an angle and the quadrature of a circle.

I attach the animated gif-file that illustrates the definition of this 
curve. More details about the curve and it's use can be found on

http://cage.ugent.be/~hs/quadratrix/quadratrix

P.S. Some days ago I already tried to post this message, but without 
success. Following the advice I got to use an other newsreader program, 
I changed from Gravity to Thunderbird. I hope it will work now.

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Attachments:
Download 'quadr02.gif' (48 KB)

Preview of image 'quadr02.gif'

> I hope it will work now.
It did :)

Nice animation, and even nicer homepage, BTW. Your illustrations help a 
lot to make the subjects you present more interesting and easier to 
understand - I loved that article about the epilleptical billard table!


Florian
-- 
camera{look_at-y*10location<8,-3,-8>*10}#local a=0;#while(a<999)sphere{
#local _=.01*a-4.99;#local p=a*.01-5;#local c=.01*a-4.995;<sin(p*pi)*5p
*10pow(p,5)*.01>sin(c*c*c*.1)+1pigment{rgb 3}}#local a=a+1;#end
/******** http://www.torfbold.com ******** http://www.imp.org ********/

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