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Re: texture_coord [message #27724 is a reply to message #27723]

Thu, 01 November 2001 16:34

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Harald von der Osten-Woldenburg (hvdosten@lb.netic.de) writes:

> Thanks a lot to David and Karl. Now it works!!!!

So we all remember how to do it, I've added an article to
my web page:

http://www.dfanning.com/ographics_tips/imgtex.html

I've also cobbled together an example program:

http://www.dfanning.com/programs/texture_surface.pro

To see how it works:

IDL> Texture_Surface

To call it with your own surface data and image, do
something like this:

IDL> Texture_Surface, surfaceData, Image=myimage

I wrote the program so you could position the image
at some coordinate location on the surface. So, for
example, if your surface is a 41 by 41 array and you
wish to put the image with its lower-left corner at
(5,10) and its upper-right corner at (25,18) with
respect to this surface. Then you can call the program
like this:

IDL> Texture_Surface, Position=[5, 10, 25, 18]

Note that the article talks about a couple of unresolved
issues. First, when I position the image as above, I don't
seem to have control over what color the *rest* of the
surface is. Second, the positioned image seems to have
problems around its edges. I suspect both of these problems
may be related, but so far I have made no progress resolving
them. I'm open to any and all ideas.

Oh, by the way, I think I was wrong about the resolution
of the surface. Making the surface bigger does not seem
to affect the resolution of the image on the surface
at all.

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
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: texture_coord By: Mark Hadfield on Sun, 04 November 2001 13:23
		Re: texture_coord By: David Fanning on Sun, 04 November 2001 08:53
		Re: texture_coord By: Karl Schultz on Fri, 02 November 2001 09:49
		Re: texture_coord By: David Fanning on Fri, 02 November 2001 09:30
		Re: texture_coord By: Pavel A. Romashkin on Fri, 02 November 2001 09:16
		Re: texture_coord By: David Fanning on Fri, 02 November 2001 09:04
		Re: texture_coord By: Karl Schultz on Fri, 02 November 2001 08:46
		Re: texture_coord By: Karl Schultz on Fri, 02 November 2001 08:39
		Re: texture_coord By: David Fanning on Fri, 02 November 2001 07:09
		Re: texture_coord By: Mark Hadfield on Thu, 01 November 2001 18:48
		Re: texture_coord By: David Fanning on Thu, 01 November 2001 17:31
		Re: texture_coord By: Mark Hadfield on Thu, 01 November 2001 17:07
		Re: texture_coord By: David Fanning on Thu, 01 November 2001 16:34
		Re: texture_coord By: Harald von der Osten-[1] on Thu, 01 November 2001 10:48
		Re: texture_coord By: David Fanning on Thu, 01 November 2001 09:57
		Re: texture_coord By: David Fanning on Thu, 01 November 2001 09:53
		Re: texture_coord By: Karl Schultz on Thu, 01 November 2001 08:11
		Re: texture_coord By: David Fanning on Thu, 01 November 2001 07:18

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