1PROCEDURE (Li: layer)
 2 	Let b(u) be barycentric value of a vertex u in Li
 3 	Let u’ be vertices on layer Li+1;
 4 	Let Nu be neighbors of u in layer Li+1
 5 	pos(u’) be position of u’ on Li+1;
 6 	FOR each u in Li
 7     //Calculate barycentric value
 8     b(u) = Sum of pos(u’) / Nu
 9 	END LOOP
10 	Sort vertices on layer Li based on their barycentric value
11END PROCEDURE