Provided by: plplot-doc_5.13.0+dfsg-6ubuntu2_all
NAME
plgcol0a - Returns 8-bit RGB values and PLFLT alpha transparency value for given color index from cmap0
SYNOPSIS
plgcol0a(icol0, r, g, b, alpha)
DESCRIPTION
Returns 8-bit RGB values (0-255) and PLFLT alpha transparency value (0.0-1.0) for given color from cmap0 (see the PLplot documentation). Values are negative if an invalid color id is given. Redacted form: plgcola(r, g, b) This function is used in example 30.
ARGUMENTS
icol0 (PLINT(3plplot), input) Index of desired cmap0 color. r (PLINT_NC_SCALAR(3plplot), output) Returned value of the red intensity in the range from 0 to 255. g (PLINT_NC_SCALAR(3plplot), output) Returned value of the green intensity in the range from 0 to 255. b (PLINT_NC_SCALAR(3plplot), output) Returned value of the blue intensity in the range from 0 to 255. alpha (PLFLT_NC_SCALAR(3plplot), output) Returned value of the alpha transparency in the range from (0.0-1.0).
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. November, 2017 PLGCOL0A(3plplot)