text: /**
   * [description]
   *
   * @function Phaser.Geom.Ellipse.Circumference
   * @since 3.0.0
   *
   * @param {Phaser.Geom.Ellipse} ellipse - [description]
   *
   * @return {number} [description]
   */
  var Circumference = function (ellipse)
  {
      var rx = ellipse.width / 2;
      var ry = ellipse.height / 2;
      var h = Math.pow((rx - ry), 2) / Math.pow((rx + ry), 2);
  
      return (Math.PI * (rx + ry)) * (1 + ((3 * h) / (10 + Math.sqrt(4 - (3 * h)))));
  };
  
  module.exports = Circumference;
  