c0lor/Lab.js

Color space conversions

var O, atan2, labPrototype, sqrt;

O = require("ut1l/create/object");

sqrt = Math.sqrt;

atan2 = Math.atan2;

labPrototype = {
  LCh: function(T) {
    if (T == null) {
      T = require("./LCh")();
    }
    T.L = this.L;
    T.C = sqrt(this.a * this.a + this.b * this.b);
    T.h = atan2(this.b, this.a);
    return T;
  },
  toString: function() {
    return "L=" + this.L + ", a=" + this.a + ", b=" + this.b;
  }
};

module.exports = O((function(L, a, b) {
  this.L = L;
  this.a = a;
  this.b = b;
}), labPrototype);