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From: pes@hutcs.cs.hut.fi (Pekka Siltanen)
Subject: Re: detecting double points in bezier curves
Message-ID: <1993Apr21.054839.1404@nntp.hut.fi>
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References: <ia522B1w165w@oeinck.waterland.wlink.nl> <1993Apr19.234409.18303@kpc.com>
Date: Wed, 21 Apr 1993 05:48:39 GMT
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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





