plrgbhls
( | r, |
| g, | |
| b, | |
| p_h, | |
| p_l, | |
p_s); |
Convert RGB color coordinates to HLS
r
(PLFLT, input)
Red intensity (0.0-1.0) of the colour
g
(PLFLT, input)
Green intensity (0.0-1.0) of the colour
b
(PLFLT, input)
Blue intensity (0.0-1.0) of the colour
p_h
(PLFLT *, output)
Pointer to hue, in degrees on the colour cone (0.0-360.0)
p_l
(PLFLT *, output)
Pointer to lightness, expressed as a fraction of the axis of the colour cone (0.0-1.0)
p_s
(PLFLT *, output)
Pointer to saturation, expressed as a fraction of the radius of the colour cone (0.0-1.0)
Redacted form:
General: plrgbhls(r, g, b, p_h, p_l, p_s)
Perl/PDL: Not available? Implemented as plrgb/plrgb1?
This function is used in example 2.