#18 TypeError: this.ParseFirstLeft is not a function

[Anonymous]

Running the following code

var CLIPPER = new ClipperLib.Clipper();

var shapeA = [
  [{ X: 647, Y: 1372 }, { X: 350, Y: 1204 }, { X: 27, Y: 1014 }, { X: 27, Y: 104 }, { X: 647, Y: 75 }]
];

var shapeB = [
  [{ X: 525, Y: 1303 }, { X: 350, Y: 1204 }, { X: 27, Y: 1014 }, { X: 27, Y: 1010 }],
  // [{ X: 647, Y: 913 }, { X: 647, Y: 967 }, { X: 595, Y: 944 }, { X: 602, Y: 911 }],
  [{ X: 647, Y: 88 }, { X: 27, Y: 118 }, { X: 27, Y: 104 }, { X: 647, Y: 75 }]
];

var solution = new ClipperLib.PolyTree();

CLIPPER.AddPaths(shapeA, ClipperLib.PolyType.ptSubject, true);
CLIPPER.AddPaths(shapeB, ClipperLib.PolyType.ptClip, true);
CLIPPER.Execute(ClipperLib.ClipType.ctDifference, solution);

var newShape = ClipperLib.Clipper.PolyTreeToPaths(solution);

Results in the following error

var firstLeft = this.ParseFirstLeft(outRec.FirstLeft);
                                 ^

TypeError: this.ParseFirstLeft is not a function

This happend when I switched from Clipper v6.1.3 to v6.2.1.2.

I have found a possible solution. When I change line 5614 from

            var firstLeft = this.ParseFirstLeft(outRec.FirstLeft);

to

            var firstLeft = ClipperLib.Clipper.ParseFirstLeft(outRec.FirstLeft);

it runs perfectly

[Timo Kähkönen]

Thanks for reporting. This will be fixed in upcoming 6.4.2.1.