void SetWalkable()
    {
        Vector2 grid_dim = mesh.GetGridDimentions();
        int     i        = 0;

        for (int x = 0; x < grid_dim.x; x++)
        {
            for (int y = 0; y < grid_dim.y; y++)
            {
                NavNode n = mesh.GetNode(x, y);
                n.SetWalkable(!Physics2D.OverlapCircle(n.GetPosiotion(), node_size / 2, obsticle_mask));
            }
        }
    }