NAME¶
plgcol0a - Returns 8-bit RGB values and double alpha value for given
color from color map0.
SYNOPSIS¶
plgcol0a(
icol0,
r,
g,
b,
a)
DESCRIPTION¶
Returns 8-bit RGB values (0-255) and double alpha value (0.0 - 1.0) for given
color from color map0 (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.
- a (PLFLT *, output)
- Pointer to PLFLT alpha value.
AUTHORS¶
Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot. This man page was
automatically generated from the DocBook source of the PLplot documentation,
maintained by Alan W. Irwin and Rafael Laboissiere.
SEE ALSO¶
PLplot documentation at
http://plplot.sourceforge.net/resources.