[pstricks] cubic b-spline package?

Michael Sharpe msharpe at ucsd.edu
Wed Jun 11 01:34:41 CEST 2008

I had run across this source using Google a few days ago---it has  
among other things a complete Postscript solution of the tridiagonal  
system that comes up when solving the cubic B-spline interpolation  
problem. I'm doing something different---drawing curves (C^2  
continuous concatenations of Bezier curves) not by interpolation but  
by specifying B-spline control points. I've now made this into a  
package that draws open and closed curves with the usual keywords  
available. It's available at


Thanks very much for your previous help with \pscustom and other  
useful information.


On Jun 10, 2008, at 2:01 PM, Herbert Voss wrote:

> Michael Sharpe schrieb:
>> It turns out that the construction I asked about a few days ago may  
>> be
>> carried out without much pain, and no Postscript programming. I  
>> placed
>> a brief discussion of the problem, with an example illustration, at http://math.ucsd.edu/~msharpe/bsplinePstricks.pdf
>> . The pstricks code carrying out the algorithm, and generating the
>> picture, is at http://math.ucsd.edu/~msharpe/multipnode.tex
> did you know http://www.fho-emden.de/~hoffmann/pstutor22112002.pdf ?
> It has some pages to bezier and splines
> Herbert
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