plrgbhls.3plplot man page

plrgbhls — Convert RGB color to HLS

Synopsis

plrgbhls(r, g, b, p_h, p_l, p_s)

Description

Convert RGB color coordinates to HLS

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.

Arguments

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)

Authors

Many developers (who are credited at http://plplot.sourceforge.net/credits.php) have contributed to PLplot over its long history.

See Also

PLplot documentation at http://plplot.sourceforge.net/documentation.php.

Info

August, 2015 PLplot API