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From: niko@iastate.edu (Schuessler Nikolaus E)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Bezier curves in QuickDraw
Keywords: Bezier, Macintosh, Toolbox
Message-ID: <1990Dec1.154652.19433@news.iastate.edu>
Date: 1 Dec 90 15:46:52 GMT
References: <1990Nov29.181603.18132@maths.tcd.ie>
Sender: news@news.iastate.edu (USENET News System)
Organization: Iowa State University, Ames, IA
Lines: 36

In article <1990Nov29.181603.18132@maths.tcd.ie> tim@maths.tcd.ie (Timothy Murphy) writes:
>Is there a routine anywhere in QuickDraw,
>or elsewhere in the Toolbox,
>for drawing Bezier curves?
>
 I don't think so.

>If not, does anyone have a routine for doing this?
 There is a demo program that does it... who ever wrote it might be willing
 to give out the source.

 I have a project due soon that is supposed to do exactly that.  If you
 can grab a copy of the book "Computer Graphics: A programming approach"
 by Steven Harrington (ISBN 0-07-026751-0) it gives you pseudo code that
 can be directly converted to pascal code (and adjusted slightly for C).

>Is it best to approximate the curve by a polygon,
>or to determine the actual pixels?

 If you make the polygon's sides smaller and smaller until they're the size of
 a pixel you won't be able to tell that it's a polygon.

>
>Any suggestions gratefully received.
>

You're welcome.




--
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Niko Schuessler               "On a two semester mission to engineer where
niko@iastate.edu               no-one has engineered before.... :-) "
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