NAME

       plscmap1la   -  Set  cmap1  colors  and  alpha  transparency  using  a  piece-wise  linear
       relationship

SYNOPSIS

       plscmap1la(itype, npts, intensity, coord1, coord2, coord3, alpha, alt_hue_path)

DESCRIPTION

       This is a variant of plscmap1l(3plplot) that supports alpha channel transparency. It  sets
       cmap1 colors using a piece-wise linear relationship between cmap1 intensity index (from 0.
       to 1.) and position in HLS or RGB color space (see the PLplot  documentation)  with  alpha
       transparency value  (0.0 - 1.0). It may be called at any time.

       Redacted form: plscmap1la(itype, intensity, coord1, coord2, coord3, alpha, alt_hue_path)

       This function is used in example 30.

ARGUMENTS

       itype (PLBOOL, input)
              true: RGB, false: HLS.

       npts (PLINT, input)
              number of control points

       intensity (const PLFLT *, input)
              position for each control point (between 0.0 and 1.0, in ascending order)

       coord1 (const PLFLT *, input)
              first coordinate (H or R) for each control point

       coord2 (const PLFLT *, input)
              second coordinate (L or G) for each control point

       coord3 (const PLFLT *, input)
              third coordinate (S or B) for each control point

       alpha (const PLFLT *, input)
              the alpha transparency value for each control point

       alt_hue_path (const PLBOOL *, input)
              alternative  interpolation  method  flag  for each control point.  (alt_hue_path[i]
              refers to the interpolation interval between the i and i + 1 control points).

AUTHORS

       Many developers  (who  are  credited  at  http://plplot.sourceforge.net/credits.php)  have
       contributed to PLplot over its long history.

SEE ALSO

       PLplot documentation at http://plplot.sourceforge.net/documentation.php.

                                          February, 2014                      PLSCMAP1LA(3plplot)