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Re: Getting the color pallete without calling LoadCT first [message #19379]

Mon, 20 March 2000 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

Ricardo Fonseca (zamb@physics.ucla.edu) writes:

> I need to get the color table from one of the default IDL colortables. Right
> now I'm doing it like this:
>
> loadct, ct, NCOLORS = 256
> TVLCT, rr, gg, bb, /get
>
> I was wondering I there was a way to do this without actually loading the
> color pallete i.e. without calling loadct

You can use the Palette object:

theColors = Obj_New('IDLgrPalette')
theColors->LoadCT, ct
theColors, GetProperty, Red=r, Green=b, Blue=b
Obj_Destroy, theColors

Or, you can load and obtain the colors in the Z-buffer,
which is a 256 color device. (This is what I used to do
before objects.)

thisDevice = !D.Name
Set_Plot, 'Z'
LoadCT, ct, /Silent
TVLCT, r, g, b, /Get
Set_Plot, thisDevice

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@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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		Re: Getting the color pallete without calling LoadCT first By: davidf on Mon, 20 March 2000 00:00
		Re: Getting the color pallete without calling LoadCT first By: Martin Schultz on Mon, 20 March 2000 00:00

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