code: public void cross(Vector v)
  	{
  		x = (y * v.z) - (z * v.y);
  		y = (z * v.x) - (x * v.z);
  		z = (x * v.y) - (y * v.x);
  	}
docs: Calculates the cross product of this {@link Vector} with a given <code>Vector</code>.
  
  @param v the vector