README.md

Clipper2

A Polygon Clipping and Offsetting library (in C++, C# & Delphi)

  

The Clipper2 library performs intersection, union, difference and XOR boolean operations on both simple and complex polygons. It also performs polygon offsetting. This is a major update of my original Clipper library that was written over 10 years ago. That library I'm now calling Clipper1 and while it still works very well, Clipper2 is better in just about every way.

Compilers

C++: Requires C++17 (but could be modified to C++11 with only minor changes)
C#: The core library uses Standard Library 2.0 but the sample code uses .NET6
Delphi: Compiles with any version of Delphi back to Delphi 7.

Documentation

Extensive HTML documentation

Examples

      //C++
      Paths64 subject, clip, solution;
      subject.push_back(MakePath({100, 50, 10, 79, 65, 2, 65, 98, 10, 21}));
      clip.push_back(MakePath({98, 63, 4, 68, 77, 8, 52, 100, 19, 12}));
      solution = Intersect(subject, clip, FillRule::NonZero);

      //C#
      Paths64 subj = new Paths64();
      Paths64 clip = new Paths64();
      subj.Add(Clipper.MakePath(new int[] { 100, 50, 10, 79, 65, 2, 65, 98, 10, 21 }));
      clip.Add(Clipper.MakePath(new int[] { 98, 63, 4, 68, 77, 8, 52, 100, 19, 12 }));
      Paths64 solution = Clipper.Intersect(subj, clip, FillRule.NonZero);

      //Delphi
      var 
        subject, clip, solution: TPaths64;
      begin
        SetLength(subject, 1);
        subject[0] := MakePath([100, 50, 10, 79, 65, 2, 65, 98, 10, 21]);
        SetLength(clip, 1);
        clip[0] := MakePath([98, 63, 4, 68, 77, 8, 52, 100, 19, 12]);
        solution := Intersect( subject, clip, frNonZero);

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Ports to other languages

Java: https://github.com/micycle1/Clipper2-java/
Kotlin: https://github.com/Monkey-Maestro/clipper2-kotlin