This fork of quickhull3d improves the original with two new key features:

• PowerDiagram2D. Creates a 2D Power Diagram (Laguerre–Voronoi) with the lifting and lower hull technique, using the 3D hull routines.
• Improved numerical robustness. Now uses (Shewchuk-style) robust predicates for geometric calculations (rather than tolerance-based distance checks, as before).