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Re: 3d matrix rotation [message #33448 is a reply to message #33447]

Thu, 02 January 2003 13:20

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

New2IDL (biomedthesis2002@yahoo.com) writes:

> I'm trying to rotate a 3D matrix using trackball. I have a 3D matrix
> of size 512x512x25. Hwn i try to rotate it, the matrix stretches along
> Z-axis. Hwn displayed the image is perfectly fine. Can anybody explain
> why that happens and what can be done to fix it. When i tried a
> dataset from the example (head.dat) for the same code, the rotation
> takes place without any stretch.

Sounds to me like you are applying the transformation matrix
to the data itself, rather than to the model that holds
the data. Apply the transformation to the model.

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: 3d matrix rotation By: jacobian on Sun, 05 January 2003 11:01
		Re: 3d matrix rotation By: Rick Towler on Thu, 02 January 2003 15:56
		Re: 3d matrix rotation By: David Fanning on Thu, 02 January 2003 13:20

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