vtkVoronoi2D doesn't work with simple cube

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1

Hello,
I’m reading an obj file “cube” which is a simple cube, and would like to project voronoi diagram on it.
I’ve tried the following code, but it either crashes, or it stays in infinite loop.

Kindly find the attached cube file also and sample code

vtkSmartPointer<vtkOBJReader> reader =
		vtkSmartPointer<vtkOBJReader>::New();
	reader->SetFileName("untitled.obj");
	reader->Update();
	
	cout << reader->GetOutput()->GetNumberOfPoints();

	vornoi_2d = vtkSmartPointer<vtkVoronoi2D>::New();


	vornoi_2d->SetInputData(reader->GetOutput());
	vornoi_2d->SetGenerateScalarsToNone();
	vornoi_2d->SetGenerateScalarsToPointIds();
	vornoi_2d->SetPointOfInterest(-1);
	vornoi_2d->SetMaximumNumberOfTileClips(50);
	vornoi_2d->GetLocator()->SetNumberOfPointsPerBucket(15);
	//vornoi_2d->SetGenerateVoronoiFlower(1);
	vornoi_2d->Update();

	vtkNew<vtkOBJWriter> plyWriter;
	cout << vornoi_2d->GetOutput()->GetNumberOfPoints();
	cout << vornoi_2d->GetOutput()->GetNumberOfCells();

	plyWriter->SetFileName("final_vornoi.obj");
	plyWriter->SetInputData(vornoi_2d->GetOutput());
	plyWriter->Write();

untitled.obj (939 Bytes)

2

The 2D Voronoi algorithm expects planar input on the plane z=0.

You might try the 3D version and extract the surface geometry from the result.