Xref: utzoo sci.math:6927 sci.math.num-analysis:14 comp.graphics:6032
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!oliveb!sun!deblil!stephenj
From: stephenj@deblil.Sun.COM (Stephen Johnson)
Newsgroups: sci.math,sci.math.num-analysis,comp.graphics
Subject: Computing Bezier Control Points for an Arc of a Circle
Keywords: bezier, arc, graphics
Message-ID: <108121@sun.Eng.Sun.COM>
Date: 5 Jun 89 22:07:02 GMT
Sender: news@sun.Eng.Sun.COM
Lines: 17


How do you compute the control points for a fourth order (third
degree) Bezier if the user gives you the following data:

	x, y	- center of circle
	rad	- radius of circle
	ang1	- starting angle for arc
	ang2	- ending angle for arc

Once you have the control points, its a simple task to render the
Bezier.  So, how do you compute the control points?  Can it be done
exactly for any angle between 0 and 360?

--------------------------+--------------------------------------------------
Stephen P. Johnson        | Some Disclaimer and such stating the company
Sun Microsystems, Inc.    | I work for knows absoutely nothing about what I
2550 Garcia Ave.,         | really do.