lib/toxi/geom/vectors.js
function() {
			var mag = this.x * this.x + this.y * this.y;
			if (mag > 0) {
				mag = 1.0 / Math.sqrt(mag);
				this.x *= mag;
				this.y *= mag;
			}
			return this;
		}
function() {
			var mag = this.x * this.x + this.y * this.y;
			if (mag > 0) {
				mag = 1.0 / Math.sqrt(mag);
				this.x *= mag;
				this.y *= mag;
			}
			return this;
		}
function ( ) { var mag = this . x * this . x + this . y * this . y ; if ( mag > 0 ) { mag = 1.0 / Math . sqrt ( mag ) ; this . x *= mag ; this . y *= mag ; } return this ; }
Normalizes the vector so that its magnitude = 1

@return itself
Normalizes the vector so that its magnitude = 1