Bezier approximation of a circular arc, in Processing
/*
Processing (http://www.processing.org, v.1.0.1) Java program for
Approximating a circular arc with a cubic Bezier curve.
Reasonably accurate for angles up to a quarter-circle or so.
The solution is taken from this PDF by Richard DeVeneza:
http://www.tinaja.com/glib/bezcirc2.pdf
linked from this excellent site by Don Lancaster:
http://www.tinaja.com/cubic01.asp
Note: written for clarity; not optimized!
*/
void [...]