Function test3

CPP/Examples/VariableOffset/VariableOffset.cpp:76–102

}

void test3() {

  double radius = 5000.0;
  Paths64 subject = { Ellipse(Rect64(-radius, -radius, radius, radius), 200) };

  ClipperOffset co;
  co.AddPaths(subject, JoinType::Miter, EndType::Polygon);

  co.SetDeltaCallback([radius](const Path64& path,
    const PathD& path_norms, size_t curr_idx, size_t prev_idx) {
      // when multiplying the x & y of edge unit normal vectors, the value will be 
      // largest (0.5) when edges are at 45 deg. and least (-0.5) at negative 45 deg.
      double delta = path_norms[curr_idx].y * path_norms[curr_idx].x;
      return radius * 0.5 + radius * delta;
    });

  //  solution
  Paths64 solution;
  co.Execute(1.0, solution);

  std::string filename = "test3.svg";
  SvgWriter svg;
  SvgAddSubject(svg, subject, FillRule::NonZero);
  SvgAddSolution(svg, solution, FillRule::NonZero, false);
  SvgSaveToFile(svg, filename, 400, 400);
  System(filename);
}

void test4() {