v 4 -2.70651 0.25609 v 4 -2.08375 -0.526323 v -4 -2.08375 -0.526323 v -4 -2.08375 -0.526323 v -4 -2.70651 0.25609 v 4 -2.70651 0.25609 f 1 2 3 f 4 5 6