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Re: Does object graphics have true-color? [message #50342]

Thu, 28 September 2006 10:49

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

Object graphics on a

yy wrote:
> In direct graphics, I can use the following to define my own colors:
> cc=0.99*tanh((findgen(ncolors)/30-4.)/2.)/2+0.5
> plots,[0,u],[0,v],[0,w], /t3d, $
> color=256.^2*B(cc(c)*255.)+256.*G(cc(c)*255.)+R(cc(c)*255.)

ummm. o.k.

> Can I do the same thing in object graphics?
> Does SetRGB in IDLgrPalette work in the
> same way? Thank you!

Unless you specify otherwise, object graphics uses an RGB color model so
you can define your colors however you wish. You'll probably find it
easier to simply define your colors as an RGB triplet instead of as an
index into a palette.

myPlot = OBJ_NEW('IDLgrPlot', FINDGEN(360), $
SIN(FINDGEN(360)*!DTOR)*!RADEG, COLOR=[255,100,50]
myModel = OBJ_NEW('IDLgrModel')
myModel -> Add, myPlot
XOBJVIEW, myModel, /BLOCK
OBJ_DESTROY, myModel

-Rick

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[Message index]

		Re: Does object graphics have true-color? By: Rick Towler on Thu, 28 September 2006 10:49
		Re: Does object graphics have true-color? By: yy on Fri, 29 September 2006 13:44

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