/// Allow to select an item in the stage.
    /// @param item A GameObject containing the item to select.
    public void SelectItem(GameObject item)
    {
        GameObject found = this.FindItem(item);

        if (found)
        {
            Debug.Log("Item Found: " + found.ToString());
            if (SelectedItem)
            {
                ModelBehaviour model = this.GetModelBehaviour(SelectedItem);
                if (model)
                {
                    model.SetSelected(false);
                    model.RotationJoystick = null;
                    model.MovementJoystick = null;
                }
            }
            ModelBehaviour foundModel = this.GetModelBehaviour(found);
            if (foundModel)
            {
                this.SelectedItem = found;
                foundModel.SetSelected(true);
                foundModel.RotationJoystick = RotationJoystick;
                if (ARSession.state == ARSessionState.Unsupported && MovementJoystick)
                {
                    foundModel.MovementJoystick = MovementJoystick;
                }
                this.ActivateSelectedInterface(true);
            }
        }
    }
    /// Function for add an item in the stage.
    /// @param objectModel The prefab of the object to add.
    /// @param position Vector3 object containing the position where the item will be added.
    /// @param rotation Quaternion object containing the rotation values of the item.
    public void AddItem(GameObject objectModel, Vector3 position, Quaternion rotation)
    {
        EditNewObject(objectModel);

        GameObject spawnedObject = Instantiate(objectModel, position, rotation);

        spawnedObject.transform.rotation = Quaternion.Euler(-90.0f, 0.0f, 0.0f);
        if (ARSession.state == ARSessionState.Unsupported)
        {
            spawnedObject.transform.localScale = spawnedObject.transform.localScale * 100;
        }
        ModelBehaviour modelBehaviour = spawnedObject.AddComponent <ModelBehaviour>() as ModelBehaviour;

        modelBehaviour.cameraHandler = cameraHandler;
        this.Items.Add(spawnedObject);
        this.SelectItem(spawnedObject);
    }