Generalization of the convex hull of a sample of points in the plane
Delaunay triangulation and Voronoi diagram
Semi-infinite edge of the Voronoi diagram
Determine whether a point belongs to the alpha-convex hull
Length of the boundary of the alpha-convex hull
Plot the Voronoi diagram and Delaunay traingulation
Random generation on a Koch snowflake curve
Returns the circumcentres of a Delaunay triangulation