programlibs/Geometry/demos/hull.xtl
A fence round scattered trees: the convex hull of 40 random points (seeded, so it repeats), its corners, the area it encloses and its center, and its picture. Run with "just demo Geometry hull".
A fence round scattered trees: the convex hull of 40 random points (seeded, so it repeats), its corners, the area it encloses and its center, and its picture. Run with "just demo Geometry hull".