Xref: utzoo comp.graphics:1402 sci.math:2533
Path: utzoo!utgpu!water!watmath!clyde!rutgers!ucla-cs!zen!ucbvax!hplabs!sdcrdcf!trwrb!simpson
From: simpson@trwrb.UUCP (Scott Simpson)
Newsgroups: comp.graphics,sci.math
Subject: Re: Spline Algorithms (for the mathematically inclined)
Keywords: Algorithms, Splines
Message-ID: <4141@trwrb.UUCP>
Date: 17 Dec 87 20:12:50 GMT
References: <4090@trwrb.UUCP>
Reply-To: simpson@trwrb.dsd.trw.com.UUCP (Scott Simpson)
Organization: TRW SDS, Redondo Beach, CA
Lines: 16

Spencer Thomas of the University of Utah answered my question.  It seems I
was using the wrong knot vector.  If you use the knot vector
		{  0     	if j < t
	u   =   {  j-t+1 	if t<=j<=n
	 j      {  n-t+2	if j>n
where t-1 is the degree of your polynomial and n+1 is the number of control
points it seems to work.  Many others volunteered valuable references to
spline books for computer programmer idiots like myself.  Stu Friedberg at
Rochester sent me a bunch of spline code.  To all of you, thanks a lot!

	
-- 
		Scott Simpson
		TRW Space and Defense Sector
		...{decvax,ihnp4,ucbvax}!trwrb!simpson	(UUCP)
		trwrb!simpson@trwind.trw.com		(ARPA)