Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!brutus.cs.uiuc.edu!apple!motcsd!hpda!hpcupt1!schi
From: schi@hpcupt1.HP.COM (Shan Chi)
Newsgroups: comp.graphics
Subject: Re: Bezier curves
Message-ID: <6350002@hpcupt1.HP.COM>
Date: 13 Sep 89 21:47:29 GMT
References: <273@marvin.moncam.co.uk>
Organization: Hewlett Packard, Cupertino
Lines: 11

Given four control points p0, p1, p2, and p3, you may calculate the new
control points qi and ri as follows:

q0 = p0
q1 = (p0+p1)/2
q2 = q1/2 + (p1+p2)/2
r0 = q3
r1 = (p1+p2)/4 + r2/2
r2 = (p2+p3)/2
r3 = p3
q3 = (q2+r1)/2