From: pes@hutcs.cs.hut.fi (Pekka Siltanen)
Subject: Re: detecting double points in bezier curves
Nntp-Posting-Host: hutcs.cs.hut.fi
Organization: Helsinki University of Technology, Finland
Lines: 26

In article <1993Apr19.234409.18303@kpc.com> jbulf@balsa.Berkeley.EDU (Jeff Bulf) writes:
>In article <ia522B1w165w@oeinck.waterland.wlink.nl>, ferdinan@oeinck.waterland.wlink.nl (Ferdinand Oeinck) writes:
>|> I'm looking for any information on detecting and/or calculating a double
>|> point and/or cusp in a bezier curve.
>|> 
>|> An algorithm, literature reference or mail about this is very appreciated,
>
>There was a very useful article in one of the 1989 issues of
>Transactions On Graphics. I believe Maureen Stone was one of
>the authors. Sorry not to be more specific. I don't have the
>reference here with me.


Stone, DeRose: Geometric characterization of parametric cubic curves.
ACM Trans. Graphics 8 (3) (1989) 147 - 163.


Manocha, Canny: Detecting cusps and inflection points in curves.
Computer aided geometric design 9 (1992) 1-24.

Pekka Siltanen