plscolbga
( | r , |
| g , | |
| b , | |
alpha
); |
Set the background color (color 0 in cmap0) by 8-bit RGB value and PLFLT alpha transparency value (see the section called “Color Map0”).
r
(PLINT, input)
Unsigned 8-bit integer (0-255) representing the degree of red in the color.
g
(PLINT, input)
Unsigned 8-bit integer (0-255) representing the degree of green in the color.
b
(PLINT, input)
Unsigned 8-bit integer (0-255) representing the degree of blue in the color.
alpha
(PLFLT, input)
Value of the alpha transparency in the range (0.0-1.0).
This function is used in example 31.