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Re: clipping with polyfill [message #29947 is a reply to message #29945]

Tue, 26 March 2002 12:54

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

James Kuyper (kuyper@gscmail.gsfc.nasa.gov) writes:

> It seems to me that this does the right thing only when the edges of the
> polygon that are clipped are perpendicular to the clipping boundary.
> Otherwise, it changes the orientation of those edges.

Right, that's what all that replacement nonsense I wrote
before was about. If the clipping place is not exactly
on a data boundary, the edges of the polygon will be
off and you will have to replace the data value with
the clipping value. You will have to interpolate,
essentially. :-)

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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[Message index]

		Re: clipping with polyfill By: Charlie Zender on Wed, 27 March 2002 10:24
		Re: clipping with polyfill By: Mark Hadfield on Tue, 26 March 2002 13:56
		Re: clipping with polyfill By: David Fanning on Tue, 26 March 2002 12:54
		Re: clipping with polyfill By: James Kuyper on Tue, 26 March 2002 12:44
		Re: clipping with polyfill By: David Fanning on Tue, 26 March 2002 12:11

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