GetShortestDistance = function (angle1, angle2)
{
    return WrapAngle(angle2 - angle1);
}
Gets the shortest signed angular distance from angle1 to angle2.
A positive distance is a clockwise rotation.
A negative distance is a counter-clockwise rotation.

For calculation in degrees use {@link Phaser.Math.Angle.ShortestBetween} instead.

@function Phaser.Math.Angle.GetShortestDistance
@since 4.0.0

@param {number} angle1 - The first angle in radians.
@param {number} angle2 - The second angle in radians.

@return {number} The distance in radians, in the range [-pi, pi).