Function getScale

js/mui.gestures.js:62–68

(starts, moves)

	 * @param {Object} moves
	 */
	var getScale = function(starts, moves) {
		if (starts.length >= 2 && moves.length >= 2) {
			var props = ['pageX', 'pageY'];
			return getDistance(moves[1], moves[0], props) / getDistance(starts[1], starts[0], props);
		}
		return 1;
	};
	/**
	 * angle
	 * @param {type} p1