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Re: IDL ROT function [message #30926 is a reply to message #30925]

Tue, 28 May 2002 12:14

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

David Fanning wrote:

> Alok Nagdev (nagdev@csee.usf.edu) writes:
>
>
>> I have a big image 2160x1440 pixels. After rotating the image
>> by arbitary amount a square image turns into a parallelogram.
>
>
> Uh, my math isn't what it used to be after that fall I
> took at the last IDL Expert Programmer's Association
> annual gala, but doesn't "square" mean that it has the
> same number of pixels on all sides. :-(

No, not if !D.X_PX_CM NE !D.Y_PX_CM. Furthermore, it is the rhombus that
has all four sides equal. Whether or not it's a square also depends upon
the angles, and not just the lengths of the sides.

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[Message index]

		Re: IDL ROT function By: thompson on Tue, 28 May 2002 15:27
		Re: IDL ROT function By: Alok Nagdev on Tue, 28 May 2002 12:53
		Re: IDL ROT function By: James Kuyper on Tue, 28 May 2002 12:14
		Re: IDL ROT function By: David Fanning on Tue, 28 May 2002 11:53

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