upxo.pxtal.vt module
https://stackoverflow.com/questions/34968838/python-finite-boundary-voronoi-cells https://stackoverflow.com/questions/36063533/clipping-a-voronoi-diagram-python?noredirect=1&lq=1 https://stackoverflow.com/questions/20677795/how-do-i-compute-the-intersection-point-of-two-lines https://stackoverflow.com/questions/20515554/colorize-voronoi-diagram/20678647#20678647