Name:         GRXRGB

Purpose:      convert HLS color to RGB color

Category:     GRAPHICS

File:         pgplot.src

Author:       T.J. Pearson

Use:          see description below.

Description:

            SUBROUTINE GRXRGB (H,L,S,R,G,B)
      
       GRPCKG: Convert a color specified in the HLS color model to one in
       the RGB model.  This is a support routine: no graphics I/O occurs.
       The inverse transformation is accomplished with routine GRXHLS.
       Reference: SIGGRAPH Status Report of the Graphic Standards Planning
       Committee, Computer Graphics, Vol.13, No.3, Association for
       Computing Machinery, New York, NY, 1979.
      
       Arguments:
      
       H,L,S (real, input): hue (0 to 360), lightness (0 to 1.0), and
             saturation (0 to 1.0).
       R,G,B (real, output): red, green, blue color coordinates, each in the
             range 0.0 to 1.0.

Updates:      Oct 16, 1998: JPT automatically extracted from source.