Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!rutgers!texbell!vector!egsner!csccat!larry
From: larry@csccat.UUCP (Larry Spence)
Newsgroups: comp.lang.postscript
Subject: Re: Evaluation of Splines
Message-ID: <3489@csccat.UUCP>
Date: 24 Jan 90 04:30:49 GMT
References: <17739@rpp386.cactus.org>
Reply-To: larry@csccat.UUCP (Larry Spence)
Organization: Computer Support Corporation. Dallas,Texas
Lines: 26

In article <17739@rpp386.cactus.org> woody@rpp386.cactus.org (Woodrow Baker) writes:
>I recently had a conversation with a very mathematically oriented freind in 
>California, in which he mentioned that it would be possible to evaluate a 
>Bezier spline with *NO* multiplies using a "diffrence table"
>Can anyone shed some light on exactly what he is talking about, and point 
>me to some reasonably clear explaination of how to accomplish the 
>computation of the table?
> 
>... a bunch of C code ...
> 

Forget the forward differencing.  Try this:
     .
     .
     x0 y0 moveto
     x1 y1 x2 y2 x3 y3 curveto
     stroke
     .
     .

This IS the PostScript newsgroup, Woody!  Sorry, I couldn't resist.

-- 
Larry Spence
larry@csccat
...{texbell,texsun,attctc}!csccat!larry