NAME

plrgbhls - Convert RGB color to HLS

SYNOPSIS

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

Convert RGB color coordinates to HLS

Redacted form: General: plrgbhls(r, g, b, p_h, p_l, p_s)

This function is used in example 2.

r (PLFLT(3plplot), input): Red intensity (0.0-1.0) of the color.
g (PLFLT(3plplot), input): Green intensity (0.0-1.0) of the color.
b (PLFLT(3plplot), input): Blue intensity (0.0-1.0) of the color.
p_h (PLFLT_NC_SCALAR(3plplot), output): Returned value of the hue in degrees (0.0-360.0) on the color cylinder.
p_l (PLFLT_NC_SCALAR(3plplot), output): Returned value of the lightness expressed as a fraction (0.0-1.0) of the axis of the color cylinder.
p_s (PLFLT_NC_SCALAR(3plplot), output): Returned value of the saturation expressed as a fraction (0.0-1.0) of the radius of the color cylinder.

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