[C++] 3D imaging using vtk

typedef itk::Image<unsigned int, 3> Image3DType;
typedef typename Image3DType::Pointer PointerImage3D;

void MainWindow::displayOriginalImage(PointerImage3D img)
{
    typedef itk::ImageToVTKImageFilter<Image3DType> TemplatedConnectorType;
    TemplatedConnectorType::Pointer con = TemplatedConnectorType::New();
    con->SetInput(img);
    vtkSmartPointer<vtkImageResliceMapper> mapper = vtkSmartPointer<vtkImageResliceMapper>::New();
    vtkSmartPointer<vtkImageActor> actor = vtkSmartPointer<vtkImageActor>::New();
    try {
        con->Update();
    } catch (itk::ExceptionObject &e)
    {
        cerr << e << endl;
    }
    //actor->GetMapper()->SetInputData(con->GetOutput());
    cout <<  "3" << endl;
    mapper->SetInputData(con->GetOutput());
    cout <<  "4" << endl;
    actor->SetMapper(mapper);


    vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> wnd = vtkSmartPointer<vtkRenderWindow>::New();
    wnd->AddRenderer(renderer);
    renderer->AddActor(actor);

    vtkSmartPointer<vtkRenderWindowInteractor> wndInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();
    wndInteractor->SetRenderWindow(wnd);
    vtkSmartPointer<vtkInteractorStyleImage> styler = vtkSmartPointer<vtkInteractorStyleImage>::New();
    wndInteractor->SetInteractorStyle(styler);

    vtkSmartPointer<vtkImagePlaneWidget> planeWidget = vtkSmartPointer<vtkImagePlaneWidget>::New();
    cout << "5" << endl;
    planeWidget->SetInputData(con->GetOutput());
    cout << "6" << endl;
    planeWidget->SetInteractor(wndInteractor);

    double origin[3] = {0,1,0};
    planeWidget->SetOrigin(origin);
    planeWidget->UpdatePlacement();

//    renderer->ResetCamera();
    wnd->Render();

    wndInteractor->Initialize();
    wnd->Render();
    cout << "7" << endl;
    planeWidget->On();
    cout << "8" << endl;
    wndInteractor->Start();
}