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Re: Is a point in a 4 vertex polygon? [message #14369 is a reply to message #14295]

Tue, 16 February 1999 00:00

David Foster
Messages: 341
Registered: January 1996

Senior Member

Michael W Asten wrote:
>
> Nando Iavarone wrote:
>
>> Hi all,
>> does anyone know a function that check if
>> a given point is inside a 4 vertex polygon?
>> Cheers,
>> Nando

One method would be to use POLLYFILLV() to return array subscripts
for the points within a polygon defined by vectors X and Y, and
search this for your point. I'm sure there's probably a faster way,
I wasn't able to see David Fanning's "Math Tips" section (network
error).

Dave
--

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
David S. Foster Univ. of California, San Diego
Programmer/Analyst Brain Image Analysis Laboratory
foster@bial1.ucsd.edu Department of Psychiatry
(619) 622-5892 8950 Via La Jolla Drive, Suite 2240
La Jolla, CA 92037
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[Message index]

		Is a point in a 4 vertex polygon? By: Nando Iavarone on Fri, 12 February 1999 00:00
		Re: Is a point in a 4 vertex polygon? By: David Kastrup on Wed, 17 February 1999 00:00
		Re: Is a point in a 4 vertex polygon? By: wmc on Wed, 17 February 1999 00:00
		Re: Is a point in a 4 vertex polygon? By: Nando Iavarone on Wed, 17 February 1999 00:00
		Re: Is a point in a 4 vertex polygon? By: David Foster on Tue, 16 February 1999 00:00

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