NAME¶
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.
