Function hue

docs/tests/v2/es6/js/sanddance.js:105987–105990

(a, b)

}

function hue(a, b) {
  var d = b - a;
  return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : (0, _constant.default)(isNaN(a) ? b : a);
}

function gamma(y) {
  return (y = +y) === 1 ? nogamma : function (a, b) {