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Re: Displaying Cartesian coordinate data on a sphere [message #82434 is a reply to message #82433]

Tue, 11 December 2012 06:17

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Platten writes:

> I have an array of several hundred thousand data points, each with an (x,y,z) coordinate. The coordinates of every point lies somewhere on the surface of a sphere. Each point represents the position and energy of an x-ray photon that has left my Monte Carlo simulation geometry.
>
> I would like to be able to view the data as a texture map overlaid onto a spherical object. I have managed to do this, but I think that the resulting mapping is distorted. I'm not sure how I should configure GRIDDATA so that the resulting grid can be mapped onto the sphere. Should I be using a different command to make the grid? Any help that you can offer would be greatly appreciated. x, y, z and energy are vectors containing the coordinates and energy of the photons:

I'm going to guess that you see some clumping in your output.
Have you read this article:

http://www.idlcoyote.com/math_tips/randomsurface.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 thue. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Displaying Cartesian coordinate data on a sphere By: dplatten on Wed, 12 December 2012 01:53
		Re: Displaying Cartesian coordinate data on a sphere By: dplatten on Tue, 11 December 2012 07:28
		Re: Displaying Cartesian coordinate data on a sphere By: David Fanning on Tue, 11 December 2012 06:17

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