d3/src/color/hcl.js at master · blehman/d3

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import "../math/trigonometry";

import "color";

import "lab";

import "rgb";

d3.hcl = function(h, c, l) {

return arguments.length === 1

? (h instanceof d3_Hcl ? d3_hcl(h.h, h.c, h.l)

: (h instanceof d3_Lab ? d3_lab_hcl(h.l, h.a, h.b)

: d3_lab_hcl((h = d3_rgb_lab((h = d3.rgb(h)).r, h.g, h.b)).l, h.a, h.b)))

: d3_hcl(+h, +c, +l);

};

function d3_hcl(h, c, l) {

return new d3_Hcl(h, c, l);

}

function d3_Hcl(h, c, l) {

this.h = h;

this.c = c;

this.l = l;

}

var d3_hclPrototype = d3_Hcl.prototype = new d3_Color;

d3_hclPrototype.brighter = function(k) {

return d3_hcl(this.h, this.c, Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)));

};

d3_hclPrototype.darker = function(k) {

return d3_hcl(this.h, this.c, Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)));

};

d3_hclPrototype.rgb = function() {

return d3_hcl_lab(this.h, this.c, this.l).rgb();

};

function d3_hcl_lab(h, c, l) {

if (isNaN(h)) h = 0;

if (isNaN(c)) c = 0;

return d3_lab(l, Math.cos(h *= d3_radians) * c, Math.sin(h) * c);

}