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Re: Strange behavior of POLYFILL [message #77731 is a reply to message #77711]

Wed, 21 September 2011 06:21

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Xavi Llort writes:

> After hours fighting against POLYFILLV, I found a strange
> behavior that I cannot understand...
>
> Here there is a small code searching the points inside a triangle. Why
> there is a point that clearly is inside the triangle and not retrieved
> by PolyfillV (see plot)? Does anyone have a solution?

I don't have time this morning to look at this very
carefully, but I will say that PolyFillV is a *graphic*
solution, not an *analytical* solution. It seems to
me you are looking for an analytical solution. If so,
there are better ways. IDLanROI is one and here is
an article that describes another:

http://www.idlcoyote.com/tips/point_in_polygon.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Strange behavior of POLYFILL By: David Fanning on Thu, 22 September 2011 05:28
		Re: Strange behavior of POLYFILL By: Xavi Llort on Thu, 22 September 2011 03:41
		Re: Strange behavior of POLYFILL By: David Fanning on Wed, 21 September 2011 06:21
		Re: Strange behavior of POLYFILL By: Xavi Llort on Wed, 21 September 2011 02:11
		Re: Strange behavior of POLYFILL By: Xavi Llort on Fri, 23 September 2011 02:48
		Re: Strange behavior of POLYFILL By: Xavi Llort on Tue, 27 September 2011 06:06

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