text: /**
   * @author       Richard Davey <rich@photonstorm.com>
   * @copyright    2018 Photon Storm Ltd.
   * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
   */
  
  /**
   * Back ease-in/out.
   *
   * @function Phaser.Math.Easing.Back.InOut
   * @since 3.0.0
   *
   * @param {number} v - The value to be tweened.
   * @param {number} [overshoot=1.70158] - [description]
   *
   * @return {number} The tweened value.
   */
  var InOut = function (v, overshoot)
  {
      if (overshoot === undefined) { overshoot = 1.70158; }
  
      var s = overshoot * 1.525;
  
      if ((v *= 2) < 1)
      {
          return 0.5 * (v * v * ((s + 1) * v - s));
      }
      else
      {
          return 0.5 * ((v -= 2) * v * ((s + 1) * v + s) + 2);
      }
  };
  
  module.exports = InOut;
  