IEnumerator UpdatePath()
    {
      float refreshRate = .25f;

      while (hasTarget)
      {
        if (lastKnownPosition.y > 0)
        {
          lastKnownPosition.y = 0f;
        }

        if (!dead && pathfinder.enabled)
        {
          // cas du chasing -- lancé si playerInSight
          if (currentState == State.Chasing)
          {
            Vector3 dirToTarget = (target.position - transform.position).normalized;
            Vector3 targetPosition = target.position - dirToTarget * (myCollisionRadius + targetCollisionRadius + attackDistanceThreshold/2);
            targetPosition.y = 0;

            pathfinder.SetDestination(targetPosition);

          }

          // Cas du searching -- lancé si searchingPlayer
          else if (currentState == State.Searching)
          {
            if ((map.GetTileFromPosition(transform.position) == map.GetTileFromPosition(lastKnownPosition)) && !hasReachedDestination)
            {
              hasReachedDestination = true;
            }

            if (hasReachedDestination && !destinationCheck)
            {
              destinationCheck = true;
              // On vérifie si le joueur est posté sur un obstacle
              StartCoroutine(SearchDestinationCheck());
            }
            else
            {
              //Debug.Log("searching last position : " + map.GetTileFromPosition(lastKnownPosition).GetComponent<Renderer>().material.color);
              pathfinder.SetDestination (lastKnownPosition);
            }
          }

          // cas du patroling
          else if (currentState == State.Patroling)
          //Debug.Log("patroling...");
          {
            if (hasReachedDestination && !destinationCheck)
            {
              destinationCheck = true;
              StartCoroutine(SearchDestinationCheck());
            }

            if (pathfinder.enabled)
            {
              pathfinder.SetDestination(destinationTile.position); //rajouté pour corriger un message d'erreur qui revenait
            }

            //Arrivée à la destination
            if ((map.GetTileFromPosition(transform.position) == destinationTile))
            {
              hasReachedDestination = true;
            }
          }
        }
        yield return new WaitForSeconds(refreshRate);
      }
    }