| Re: 24-bit color contour [message #27881 is a reply to message #27880] |
Fri, 09 November 2001 18:53  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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tom (tom2959@21cn.com) writes:
> Hi, is it possible for me to draw a 24-bits color filled contour plot on a
> 24-bits screen or PS file? It is usually a 8-bits contour or grey contour.
The question that comes up for me is not "is it possible"?
But, rather "why in the world would you want to do it?"
Let me see if I understand this. You want a filled
contour plot with more than 256 colors, implying that
you are going to use more than 256 contour intervals.
Have you given any thought to how big that window is
going to have to be to get any kind of resolution on
your filled contour plot?
Or, do you mean you wish to specify the contour
colors as 24-bit values? This is possible in object
graphics, but no one I know uses contour plots in
object graphics because there is no way to label
contour intervals there. It is not possible in
direct graphics, but again, I can't think of any
reason *why* it should be possible. No practical
filled contour plot would have more than 256 colors.
And even it it did, on a 24-bit display you would
just change color tables and continue layering on
more contours in more colors.
Perhaps I'm missing the gist of this question
entirely. All I can say in my defense is that
it *is* Friday night. :-)
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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