On Jul 13, 2007, at 3:19 AM, Jack Glendening wrote:
> I am trying to determine the HSV values used for a color map
> (specifically BlAqGrYeOrReVi20) so I can make a modified version. I
> can't find any way of querying a color map index for its RGB values
> and
> I can't find any way of converting RGB values to HSV (whereas I can
> find a HSV->RGB function). Do such functions exist in NCL ?
Apparently rgb2hsv is not an NCL procedure at this time. We have
all of these color conversion functions at the Fortran level - don't
know
why they are not all in NCL. We will add them. In the meantime
I have attached the Fortran source for RGBHSV with the appropriate
WRAPIT interface delimiters.
Just do:
WRAPIT rgbhsv.f
to create rgbhsv.so. I have attached an example source showing
how to use the wrapped procedure.
Fred Clare
>
> Jack
>
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