chull_2d-windows-demo interactive 2d convex hull in a LEDA window chull_3d-windows-demo random 3d convex hull in a LEDA window chull_3d-geomview-demo random 3d convex hull (3d kernel) in geomview chull_dd-geomview-demo random 3d convex hull (dd kernel) in geomview chull_dd-runtime random dd runtime (incremental dimension) delaunay_3d-windows-demo random 2d delaunay/ 3d chull demo delaunay_dd-runtime random dd runtime (incremental dimension)