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Re: polyfill with transparent colors [message #60795]

Fri, 13 June 2008 13:43

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

cgoethel@igpp.ucla.edu writes:

> I have a linear plot that I would like to draw a polygon on top of,
> but still be able to see the underlying plot. Currently, the polygon
> is drawn on top of the existing plot, but the color is not transparent
> so you cannot see the data that is below the polygon. I cannot draw
> the polygon first and then redraw the plot using oplot (the routine to
> draw the plot is not mine, complex, so can't be modified to use oplot
> rather than plot). Any suggestions?

Here is an article that describes the technique:

http://www.dfanning.com/code_tips/transpoly.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: polyfill with transparent colors By: David Fanning on Fri, 13 June 2008 13:43
		Re: polyfill with transparent colors By: David Fanning on Fri, 13 June 2008 12:18
		Re: polyfill with transparent colors By: Mike[2] on Fri, 20 June 2008 08:42
		Re: polyfill with transparent colors By: Richard French on Thu, 26 June 2008 20:12

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