1PLSCMAP1LA(3plplot)               PLplot API               PLSCMAP1LA(3plplot)
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NAME

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

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

14       This  is  a  variant  of plscmap1l(3plplot) that supports alpha channel
15       transparency. It sets cmap1 colors using a piece-wise linear  relation‐
16       ship between cmap1 intensity index (0.0-1.0) and position in HLS or RGB
17       color space (see the  PLplot  documentation)  with  alpha  transparency
18       value (0.0-1.0). It may be called at any time.
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20       Redacted form: plscmap1la(itype, intensity, coord1, coord2, coord3, al‐
21       pha, alt_hue_path)
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23       This function is used in example 30.
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ARGUMENTS

26       itype (PLBOOL(3plplot), input)
27              true: RGB, false: HLS.
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29       npts (PLINT(3plplot), input)
30              number of control points.
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32       intensity (PLFLT_VECTOR(3plplot), input)
33              A vector containing the cmap1 intensity index (0.0-1.0)  in  as‐
34              cending order for each control point.
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36       coord1 (PLFLT_VECTOR(3plplot), input)
37              A  vector containing the first coordinate (H or R) for each con‐
38              trol point.
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40       coord2 (PLFLT_VECTOR(3plplot), input)
41              A vector containing the second coordinate (L or G) for each con‐
42              trol point.
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44       coord3 (PLFLT_VECTOR(3plplot), input)
45              A  vector containing the third coordinate (S or B) for each con‐
46              trol point.
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48       alpha (PLFLT_VECTOR(3plplot), input)
49              A vector containing the alpha transparency value  (0.0-1.0)  for
50              each control point.
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52       alt_hue_path (PLBOOL_VECTOR(3plplot), input)
53              A vector (with npts - 1 elements) containing the alternative in‐
54              terpolation method Boolean value for each control  point  inter‐
55              val.   (alt_hue_path[i] refers to the interpolation interval be‐
56              tween the i and i + 1 control points).
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AUTHORS

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

64       PLplot documentation at http://plplot.org/documentation.php.
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68                                 January, 2021             PLSCMAP1LA(3plplot)
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