void Click()
    {
        Vector3 scenePos = scene.transform.InverseTransformPoint(Camera.main.ScreenToWorldPoint(Input.mousePosition));
        Vector2 nodePos  = IsoUtil.ScreenToIsoGrid(scene.size, scenePos.x, scenePos.y);

        int nodeX = (int)nodePos.x;
        int nodeZ = (int)nodePos.y;

        if (grid.CheckInGrid(nodeX, nodeZ) && grid.GetNode(nodeX, nodeZ).walkable)
        {
            IsoObject obj = (IsoObject)Instantiate(isoObjectPrefab);
            obj.SetNodePosition(nodeX, nodeZ);
            if (obj.GetWalkable(grid))
            {
                scene.AddIsoObject(obj);
                obj.SetNodePosition(nodeX, nodeZ);
                obj.transform.localScale = Vector3.one;
                obj.SetWalkable(false, grid);
            }
            else
            {
                Destroy(obj.gameObject);
            }
        }
    }