Install libqhull-r7 by entering the following commands in the terminal:
sudo apt update sudo apt install libqhull-r7
calculate convex hulls and related structures (reentrant shared library)
Qhull computes convex hulls, Delaunay triangulations, halfspace intersections about a point, Voronoi diagrams, furthest-site Delaunay triangulations, and furthest-site Voronoi diagrams. It runs in 2-d, 3-d, 4-d, and higher dimensions. . This package contains the reentrant version of the shared C library.