private Vector3 nowPos;
private Vector3 tarPos;
private float smoothMoveT = 1.0f;
public float smoothMoveSpeed = 1.0f;
public float smoothMoveDuration = 0.3f;

public void smooth(Vector3 newTarPos)
{
  nowPos = transform.position;
  tarPos = newTarPos;
  smoothMoveT = 0.0f;
}

void Update()
{
  if (smoothMoveT < 1.0f)
  {
    smoothMoveT += ((smoothMoveSpeed*Time.timeScale)/smoothMoveDuration) * Time.deltaTime;
    transform.position = Vector3.Lerp(nowPos, tarPos, smoothMoveT);
  }
}