Out = function (v, amplitude, period)
{
    if (amplitude === undefined) { amplitude = 0.1; }
    if (period === undefined) { period = 0.1; }

    if (v === 0)
    {
        return 0;
    }
    else if (v === 1)
    {
        return 1;
    }
    else
    {
        var s = period / 4;

        if (amplitude < 1)
        {
            amplitude = 1;
        }
        else
        {
            s = period * Math.asin(1 / amplitude) / (2 * Math.PI);
        }

        return (amplitude * Math.pow(2, -10 * v) * Math.sin((v - s) * (2 * Math.PI) / period) + 1);
    }
}
Elastic ease-out.

@function Phaser.Math.Easing.Elastic.Out
@since 3.0.0

@param {number} v - The value to be tweened.
@param {number} [amplitude=0.1] - The amplitude of the elastic ease.
@param {number} [period=0.1] - Sets how tight the sine-wave is, where smaller values are tighter waves, which result in more cycles.

@return {number} The tweened value.