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Re: [Swarm-Modelling] calculating distance on a torus
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From: |
Konrad_Richter |
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Subject: |
Re: [Swarm-Modelling] calculating distance on a torus |
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Date: |
Mon, 10 Oct 2005 22:01:02 +0200 |
If you mean by torus just that it is
a grid that is self-closed (ie, you walk out on one side & come back
on the other), the distance should be something like
sqrt(min(|x1-x2|,X-|x1-x2|)^2+min(|y1-y2|,Y-|y1-y2|)^2)
where X and Y denote the grid size in x and y-size respectively.
Cheers,
Konrad
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Konrad Richter
McKinsey & Company, Inc.
Herrengasse 1-3
A-1010 Wien
Austria
Phone +43 1 5370-6160
Fax +43 1 5370-6161
Mobile +49 175 318-6160
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10.10.2005 21:02
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| [Swarm-Modelling] calculating distance
on a torus |
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Hello,
Could anyone point me in the direction of some code for calculating
Euclidean distance between two coordinates [(x1, y1) and (x2, y2)] on a
torus? I imagine one would calculate distance a bit differently on
a
torus than on a grid, so I thought I'd quickly check to see if anyone
had already tackled this problem before setting out to do so myself.
Thanks for your time,
Luke Premo
anthropology
u of arizona
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