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yields the planar Voronoi diagram of the points .

takes val to be the Delaunay triangulation vertex adjacency list.

takes hull to be the convex hull index list.
  • The Voronoi diagram is represented by two lists, a vertex coordinate list and a vertex adjacency list.
  • An element of the vertex adjacency list corresponds to the point , and the indices identify the vertices or rays in the vertex coordinate list which form the polygon associated with the point .
  • The optional arguments val and hull may be used to speed up the Voronoi diagram computation if the Delaunay triangulation and convex hull are available.