timohausmann

/**
 * return the distance between two points.
 *
 * @param {number} x1		x position of first point
 * @param {number} y1		y position of first point
 * @param {number} x2		x position of second point
 * @param {number} y2		y position of second point
 * @return {number} 		distance between given points
 */
Math.getDistance = function( x1, y1, x2, y2 ) {