1PLSCMAP1A(3plplot)                PLplot API                PLSCMAP1A(3plplot)
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NAME

6       plscmap1a - Set semitransparent cmap1 RGBA colors.
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SYNOPSIS

9       plscmap1a(r, g, b, alpha, ncol1)
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DESCRIPTION

12       Set  semitransparent  cmap1 colors (see the PLplot documentation) using
13       RGBA vector values.  This function also sets the number of  cmap1  col‐
14       ors.   N.B.  Continuous  cmap1 colors are indexed with a floating-point
15       index in the range from 0.0-1.0 which is linearly transformed (e.g., by
16       plcol1(3plplot)) to an integer index of these RGBA vectors in the range
17       from 0 to ncol1-1.  So in order for this continuous color model to work
18       properly,  it is the responsibility of the user of plscmap1(3plplot) to
19       insure that these RGBA vectors are continuous functions of their  inte‐
20       ger indices.
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22       Redacted form: plscmap1a(r, g, b, alpha)
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24       This function is used in example 31.
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ARGUMENTS

27       r (PLINT_VECTOR(3plplot), input)
28              A  vector  that represents (using unsigned 8-bit integers in the
29              range from 0-255) the degree of red in the color as a continuous
30              function of the integer index of the vector.
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32       g (PLINT_VECTOR(3plplot), input)
33              A  vector  that represents (using unsigned 8-bit integers in the
34              range from 0-255) the degree of green in the color as a continu‐
35              ous function of the integer index of the vector.
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37       b (PLINT_VECTOR(3plplot), input)
38              A  vector  that represents (using unsigned 8-bit integers in the
39              range from 0-255) the degree of blue in the color as a  continu‐
40              ous function of the integer index of the vector.
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42       alpha (PLFLT_VECTOR(3plplot), input)
43              A  vector  that represents (using PLFLT values in the range from
44              0.0-1.0 where 0.0 corresponds to completely transparent and  1.0
45              corresponds  to completely opaque) the alpha transparency of the
46              color as a continuous function of the integer index of the  vec‐
47              tor.
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49       ncol1 (PLINT(3plplot), input)
50              Number of items in the r, g, b, and alpha vectors.
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AUTHORS

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

58       PLplot documentation at http://plplot.org/documentation.php.
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62                                November, 2019              PLSCMAP1A(3plplot)
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