deldir                  Construct the Delaunay triangulation and the
                        Dirichlet (Voronoi)
plot.deldir             Produce a plot of the Delaunay triangulation
                        and Dirichlet (Voronoi)
plot.tile.list          Plot Dirchlet/Voronoi tiles
plot.triang.list        Plot Delaunay triangles
tile.centroids          Compute centroids of Voronoi/Dirchlet tiles.
tile.list               Create a list of tiles in a tessellation.
triang.list             Produce a list of Delaunay triangles.
