DistancePower = function (x1, y1, x2, y2, pow)
{
    if (pow === undefined) { pow = 2; }

    return Math.sqrt(Math.pow(x2 - x1, pow) + Math.pow(y2 - y1, pow));
}
Calculate the distance between two sets of coordinates (points) to the power of `pow`.

@function Phaser.Math.Distance.Power
@since 3.0.0

@param {number} x1 - The x coordinate of the first point.
@param {number} y1 - The y coordinate of the first point.
@param {number} x2 - The x coordinate of the second point.
@param {number} y2 - The y coordinate of the second point.
@param {number} pow - The exponent.

@return {number} The distance between each point.