PEX Color selection

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1 total messages Started by Michiel Bruschke Thu, 08 Oct 1992 06:05

#155

Author: Michiel Bruschke
Date: Thu, 08 Oct 1992 06:05

23 lines
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I am trying to plot a shaded 3-D surface with colour contours. The 
contours need to be in a intuitively logical order. Right
now I am setting up the colors by choosing HSV values. I set the
Saturation and Value to .95 and sweep Hue from blue to red.
I then convert the HSV values to RGB using an algorithm from
Foley and van Dam "Fundamentals of Interactive Computer Graphics".

The problem is that I end up with a number of colors that are hard
to distinguish in the green range (with only 11 contours). 
I tried skewing the Hue sweep, but that results in shifting the problem 
to the reds.

Does anybody have a better algorithm for setting up an arbitrary
range of colors ? An algorithm that would also vary the
saturation would probably offer some improvement.

Any thoughts/suggestions are greatly appreciated
Thanks,

mike

P.S I am using SunPHIGS 2.0

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