plgcol0a.3plplot man page

plgcol0a — Returns 8-bit RGB values and double 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 double 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.

This function is used in example 30.

Arguments

icol0 (PLINT, input)
Index of desired cmap0 color.
r (PLINT *, output)
Pointer to 8-bit red value.
g (PLINT *, output)
Pointer to 8-bit green value.
b (PLINT *, output)
Pointer to 8-bit blue value.
alpha (PLFLT *, output)
Pointer to PLFLT alpha transparency value.

Authors

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

See Also

PLplot documentation at http://plplot.sourceforge.net/documenta….

Info

August, 2015 PLplot API