polyData.GetPointData().AddArray(colorArray);
polyData.GetPointData().SetScalars(radiusArray);
vtkCleanPolyData cleanFilter = new vtkCleanPolyData();
cleanFilter.SetInput(polyData);
cleanFilter.Update();
vtkTubeFilter tube = new vtkTubeFilter();
tube.SetVaryRadiusToVaryRadiusByAbsoluteScalar();
tube.SetInput(cleanFilter.GetOutput());
tube.SetNumberOfSides(20);