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Re: coordinates & transforms & plotting [message #42933]

Mon, 28 February 2005 06:58

Ralf Schaa
Messages: 37
Registered: June 2001

Member

Thanks again, David. I try figure that out with T3D.

David Fanning wrote:
> I'm not sure what a "basis" is, but a coordinate frame
> consists of an origin (perhaps what you are calling
> the basis) and three orthogonal axes. The origin of
> the IDL coordinate system is the (0,0,0) point in
> the lower-left corner of the window, with the X axis
> horizontal, the Y axis vertical, and the Z axis
> coming out toward you.

That's the interesting part...didn't know that the 'plot-view' frame is
this vector base I was talking about (which is spanning up the vector space)

Cheers (in german this is 'Prost' and we drink a beer, isn't it?) ,
-Ralf

>
>> 2.)
>> And how can I manipulate that in a way it takes *my* basis?
>
>
> Typically, in IDL you set up the 3D transformation
> matrix with calls to T3D. You set a new "origin" with
> the TRANSLATE keyword.
>
> Cheers,
>
> David
>

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[Message index]

		Re: coordinates & transforms & plotting By: Ralf Schaa on Mon, 28 February 2005 06:58
		Re: coordinates & transforms & plotting By: David Fanning on Mon, 28 February 2005 06:28
		Re: coordinates & transforms & plotting By: Ralf Schaa on Mon, 28 February 2005 05:35
		Re: coordinates & transforms & plotting By: Ralf Schaa on Mon, 28 February 2005 05:23
		Re: coordinates & transforms & plotting By: David Fanning on Mon, 28 February 2005 05:19

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