NAME

       RGBHSV - Converts a color specification given in the Red, Green, Blue (RGB) color space to
       color values in the Hue, Saturation, and Value (HSV) color space.

SYNOPSIS

       CALL RGBHSV (R, G, B, H, S, V)

C-BINDING SYNOPSIS

       #include <ncarg/ncargC.h>

       void c_rgbhsv (float r, float g, float b, float *h,
       float *s, float *v)

DESCRIPTION

       R           (REAL, input, range [0.,1.])  represents the red intensity component of the
                   input point in RGB color space.

       G           (REAL, input, range [0.,1.])  represents the green intensity component of the
                   input point in RGB color space.

       B           (REAL, input, range [0.,1.])  represents the blue intensity component of the
                   input point in RGB color space.

       H           (REAL, output, range [0.,360.) ) represents the hue of the input point in HSV
                   color space. A value of (R,0.,0.) in the input space will result in a hue of
                   0. in the output space.

       S           (REAL, output, range [0.,1.])  represents the saturation value of the input
                   point in HSV color space.  Saturation is a measure of how much white light is
                   mixed with the color. Saturation values of 0.  represent grays (with a gray
                   value equal to V).  Saturation values of 1. are fully saturated colors.  The
                   hue is technically undefined when S=0.; the code leaves H at its previous
                   value when S=0. (0.  initially). The fully saturated pure hues occur when S=1.
                   and V=1.

       V           (REAL, output, range [0.,1.])  represents the value in HSV space.

C-BINDING DESCRIPTION

       The C-binding argument descriptions are the same as the FORTRAN argument descriptions.

EXAMPLES

       Use the ncargex command to see the following relevant examples: tcolcv, fcce02.

ACCESS

       To use RGBHSV or c_rgbhsv, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c,
       preferably in that order.

MESSAGES

       See the colconv man page for a description of all Colconv error messages and/or
       informational messages.

SEE ALSO

       Online: colconv, hlsrgb, hsvrgb, rgbhls, rgbyiq, yiqrgb, ncarg_cbind.

       Hardcopy: NCAR Graphics Fundamentals, UNIX Version

COPYRIGHT

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.