package {
	public class Vector2 {
		public var x:Number;
		public var y:Number;
		
		public function Vector2(x:Number = 0, y:Number = 0) {
			this.x = x;
			this.y = y;
		}
		
		public function get z():Number {
			return y;
		}
		
		public function set z(value:Number):void {
			y = value;
		}
		
		public function clone():Vector2 {
			return new Vector2(x, y);
		}
		
		public function add(rhs:Vector2):Vector2 {
			return new Vector2(x + rhs.x, y + rhs.y);
		}
		
		public function subtract(rhs:Vector2):Vector2 {
			return new Vector2(x - rhs.x, y - rhs.y);
		}
		
		public function get magnitude():Number {
			return Math.sqrt(squareMagnitude);
		}
		
		public function get squareMagnitude():Number {
			return x * x + y * y;
		}
		
		public function cross(rhs:Vector2):Number {
			return x * rhs.y - y * rhs.x;
		}
	}
}