PLRGBHLS(3)                       PLplot API                       PLRGBHLS(3)



NAME
       plrgbhls - Convert RGB color to HLS

SYNOPSIS
       plrgbhls(r, g, b, p_h, p_l, p_s)

DESCRIPTION
       Convert RGB color coordinates to HLS

       Redacted form:  General: plrgbhls(r, g, b, p_h, p_l, p_s) Perl/PDL: Not
       available? Implemented as plrgb/plrgb1?


       This function is used in example 2.

ARGUMENTS
       r (PLFLT, input)
              Red intensity (0.0-1.0) of the colour

       g (PLFLT, input)
              Green intensity (0.0-1.0) of the colour

       b (PLFLT, input)
              Blue intensity (0.0-1.0) of the colour

       p_h (PLFLT *, output)
              Pointer to hue, in degrees on the colour cone (0.0-360.0)

       p_l (PLFLT *, output)
              Pointer to lightness, expressed as a fraction of the axis of the
              colour cone (0.0-1.0)

       p_s (PLFLT *, output)
              Pointer to saturation, expressed as a fraction of the radius of
              the colour cone (0.0-1.0)


AUTHORS
       Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot.  This
       man page was automatically generated from the DocBook source of the
       PLplot documentation, maintained by Alan W. Irwin and Rafael
       Laboissiere.

SEE ALSO
       PLplot documentation at http://plplot.sourceforge.net/resources.



                                November, 2007                     PLRGBHLS(3)
