public Vector2d subtract(Vector2d v) {
Vector2d ret = new Vector2d(touchvgPINVOKE.Vector2d_subtract(swigCPtr, Vector2d.getCPtr(v)), true);
if (touchvgPINVOKE.SWIGPendingException.Pending) throw touchvgPINVOKE.SWIGPendingException.Retrieve();
return ret;
}