JSオブジェクト用コード
[code]
function rgbToHsl(r, g, b){
r /= 255, g /= 255, b /= 255;
var max = Math.max(r, g, b), min = Math.min(r, g, b);
var h, s, l = (max + min) / 2;
if(max == min){
h = s = 0; // achromatic
}else{
var d = max – min;
s = l > 0.5 ? d / (2 – max – min) : d / (max + min);
switch(max){
case r: h = (g – b) / d + (g < b ? 6 : 0); break;
case g: h = (b – r) / d + 2; break;
case b: h = (r – g) / d + 4; break;
}
h /= 6;
}
outlet(0, h, s, l);
}
function hslToRgb(h, s, l){
var r, g, b;
if(s == 0){
r = g = b = l; // achromatic
}else{
function hue2rgb(p, q, t){
if(t < 0) t += 1; if(t > 1) t -= 1;
if(t < 1/6) return p + (q – p) * 6 * t;
if(t < 1/2) return q;
if(t < 2/3) return p + (q – p) * (2/3 – t) * 6;
return p;
}
var q = l < 0.5 ? l * (1 + s) : l + s – l * s;
var p = 2 * l – q;
r = hue2rgb(p, q, h + 1/3);
g = hue2rgb(p, q, h);
b = hue2rgb(p, q, h – 1/3);
}
r = Math.round(r*255);
g = Math.round(g*255);
b = Math.round(b*255);
outlet(0,r, g, b);
}
[/code]