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Re: IDL objects (not object graphics) tutorial? [message #46645 is a reply to message #46457]

Tue, 29 November 2005 20:20

dzarro
Messages: 1
Registered: November 2005

Junior Member

Hi,

I have a tutorial at http://orpheus.nascom.nasa.gov/~zarro/idl/objects
that I developed at NASA/GSFC.

Dominic

Richard G. French wrote:
> I'd like to learn how to make use of IDL objects. I'm not ready for object
> graphics yet, because I'd like to understand INITS and SELF and classes and
> methods before worrying about viewports and plots disappearing because I am
> not using the correct projection scheme. I've scoured the web in vain
> looking for a simple tutorial on how and when to use objects in IDL. I've
> found a few generic tutorials praising the virtues of object-oriented
> programming, but almost none of the examples give me any sense of why one
> would go to the trouble. For example, one tutorial describes an object that
> can return constants such as the speed of light or Planck's constant, but it
> isn't obvious to me why this is superior to a simple function that returns
> clight() or PlancksConst().
>
> What I am looking for is something with a simple application or two in which
> it is both clear why using objects is superior AND which explains what is
> meant by self and methods and classes. Without some specific examples to
> look at, I am having a hard time making sense of the nomenclature or of the
> value of the approach.
>
> This is prompted in part by David's nifty little pixmap object that I've
> already made use of in a new program - thanks, David.
>
> Someone must be out there just waiting to get rich writing a book on this
> topic. The second volume can be about object graphics - I'd settle for the
> first volume for now - a gentle introduction to objects in IDL. Any
> suggestions? Thanks!
>
> Dick French

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[Message index]

		IDL objects (not object graphics) tutorial? By: Richard French on Wed, 23 November 2005 18:33
		Re: IDL objects (not object graphics) tutorial? By: b_gom on Thu, 24 November 2005 01:04
		Re: IDL objects (not object graphics) tutorial? By: Paul Van Delst[1] on Fri, 02 December 2005 08:30
		Re: IDL objects (not object graphics) tutorial? By: David Fanning on Fri, 02 December 2005 08:11
		Re: IDL objects (not object graphics) tutorial? By: Paul Van Delst[1] on Fri, 02 December 2005 07:46
		Re: IDL objects (not object graphics) tutorial? By: Richard French on Wed, 30 November 2005 18:36
		Re: IDL objects (not object graphics) tutorial? By: dzarro on Tue, 29 November 2005 20:20

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