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http://iquilezles.org/www/articles/smoothvoronoi/smoothvoronoi.htm http://iquilezles.org/www/articles/smoothvoronoi/smoothvoron... http://iquilezles.org/www/articles/voronoise/voronoise.htm http://iquilezles.org/www/articles/voronoise/voronoise.htm http://iquilezles.org/www/articles/voronoilines/voronoilines.htm http://iquilezles.org/www/articles/voronoilines/voronoilines... More interesting articles about voronoi diagrams, for those who are interested.