IEnumerator DrawAimTrajectory()
 {
     while (aiming)
     {
         Tuple <Vector2, bool> forceAndType = CalculateForce();
         _points = _pathway.GetTrajectory(ball.transform.position, forceAndType.Item1);
         _pathway.DrawTrajectory(trajectoryShow, _points, forceAndType.Item2 ? tensionAngleSpread : 0f);
         DrawElastic(ball.transform.position);
         yield return(new WaitForEndOfFrame());
     }
 }