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

itype (PLBOOL(3plplot), input)
              true: RGB, false: HLS.

       npts (PLINT(3plplot), input)
              number of control points.

       intensity (PLFLT_VECTOR(3plplot), input)
              A vector containing the cmap1 intensity index (0.0-1.0) in ascending order for each control point.

       coord1 (PLFLT_VECTOR(3plplot), input)
              A vector containing the first coordinate (H or R) for each control point.

       coord2 (PLFLT_VECTOR(3plplot), input)
              A vector containing the second coordinate (L or G) for each control point.

       coord3 (PLFLT_VECTOR(3plplot), input)
              A vector containing the third coordinate (S or B) for each control point.

       alpha (PLFLT_VECTOR(3plplot), input)
              A vector containing the alpha transparency value (0.0-1.0) for each control point.

       alt_hue_path (PLBOOL_VECTOR(3plplot), input)
              A  vector  (with  npts-1 elements) containing the alternative interpolation method Boolean value
              for each control point interval.  (alt_hue_path[i] refers to the  interpolation  interval  between
              the i and i + 1 control points).

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

       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 (0.0-1.0) 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.

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

       PLplot documentation at http://plplot.org/documentation.php.

                                                   July, 2025                                PLSCMAP1LA(3plplot)

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