You might consider Shewchuk’s methods for robust geometric computations: https://www.cs.cmu.edu/~quake/robust.html https://www.cs.cmu.edu/~quake/robust.html Th

You might consider Shewchuk’s methods for robust geometric computations: https://www.cs.cmu.edu/~quake/robust.html https://www.cs.cmu.edu/~quake/robust.html There are more modern implementations available on GitHub, but I’ve found it to be fairly easy to integrate into C-family projects without much modification.