[saluki]

Take a look at this if you haven't already. https://stackoverflow.com/questions/9349220/2d-geometry-libr...

[huxingyi]

Thanks, I checked that link. The "CGAL/Polygon Mesh Processing" package is licensed on GPL: https://doc.cgal.org/latest/Manual/packages.html

And the mentioned other libraries doesn't have the features I want.