将svg路径转换为多边形，以便在Javascript Clipper中使用

我正在尝试使用JS Clipper对SVG路径(包含二次和三次bezier)执行布尔运算。

JS Clipper从多边形开始，然后执行操作，然后似乎将它们转换回SVG路径。

下面的函数给出了一个SVG路径，但是下面的例子从两个多边形开始。

函数示例:

// Polygon Arrays are expanded for better readability
function clip() {
  var subj_polygons = [
    [{
      X: 10,
      Y: 10
    }, {
      X: 110,
      Y: 10
    }, {
      X: 110,
      Y: 110
    }, {
      X: 10,
      Y: 110
    }],
    [{
      X: 20,
      Y: 20
    }, {
      X: 20,
      Y: 100
    }, {
      X: 100,
      Y: 100
    }, {
      X: 100,
      Y: 20
    }]
  ];
  var clip_polygons = [
    [{
      X: 50,
      Y: 50
    }, {
      X: 150,
      Y: 50
    }, {
      X: 150,
      Y: 150
    }, {
      X: 50,
      Y: 150
    }],
    [{
      X: 60,
      Y: 60
    }, {
      X: 60,
      Y: 140
    }, {
      X: 140,
      Y: 140
    }, {
      X: 140,
      Y: 60
    }]
  ];
  var scale = 100;
  subj_polygons = scaleup(subj_polygons, scale);
  clip_polygons = scaleup(clip_polygons, scale);
  var cpr = new ClipperLib.Clipper();
  cpr.AddPolygons(subj_polygons, ClipperLib.PolyType.ptSubject);
  cpr.AddPolygons(clip_polygons, ClipperLib.PolyType.ptClip);
  var subject_fillType = ClipperLib.PolyFillType.pftNonZero;
  var clip_fillType = ClipperLib.PolyFillType.pftNonZero;
  var clipTypes = [ClipperLib.ClipType.ctUnion];
  var clipTypesTexts = "Union";
  var solution_polygons, svg, cont = document.getElementById('svgcontainer');
  var i;
  for (i = 0; i < clipTypes.length; i++) {
    solution_polygons = new ClipperLib.Polygons();
    cpr.Execute(clipTypes[i], solution_polygons, subject_fillType, clip_fillType);
    console.log(polys2path(solution_polygons, scale));
  }
}
// helper function to scale up polygon coordinates
function scaleup(poly, scale) {
  var i, j;
  if (!scale) scale = 1;
  for (i = 0; i < poly.length; i++) {
    for (j = 0; j < poly[i].length; j++) {
      poly[i][j].X *= scale;
      poly[i][j].Y *= scale;
    }
  }
  return poly;
}
// converts polygons to SVG path string
function polys2path(poly, scale) {
  var path = "",
    i, j;
  if (!scale) scale = 1;
  for (i = 0; i < poly.length; i++) {
    for (j = 0; j < poly[i].length; j++) {
      if (!j) path += "M";
      else path += "L";
      path += (poly[i][j].X / scale) + ", " + (poly[i][j].Y / scale);
    }
    path += "Z";
  }
  return path;
}