h
(PLFLT, input)
Hue, in degrees on the colour cone (0.0-360.0)
l
(PLFLT, input)
Lightness, expressed as a fraction of the axis of the colour
cone (0.0-1.0)
s
(PLFLT, input)
Saturation, expressed as a fraction of the radius of the
colour cone (0.0-1.0)
p_r
(PLFLT *, output)
Pointer to red intensity (0.0-1.0) of the colour
p_g
(PLFLT *, output)
Pointer to green intensity (0.0-1.0) of the colour
p_b
(PLFLT *, output)
Pointer to blue intensity (0.0-1.0) of the colour
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