vtkImageConstantPad* pad1 = vtkImageConstantPad::New();
            pad1->SetInput(volume1->getData());
            pad1->SetConstant(0.0);
            pad1->SetOutputWholeExtent(0, 511, 0, 511, 0, 0);

            vtkImageConstantPad* pad2 = vtkImageConstantPad::New();
            pad2->SetInput(volume2->getData());
            pad2->SetConstant(0.0);
            pad2->SetOutputWholeExtent(0, 511, 0, 511, 0, 0);

            wipe = vtkSmartPointer<vtkImageRectilinearWipe>::New();
            wipe->SetInput(0,pad1->GetOutput());
            wipe->SetInput(1,pad2->GetOutput());
            wipe->SetPosition(10,256);
            wipe->SetWipe(0);

            vtkSmartPointer<vtkRenderer> ren1 = vtkSmartPointer<vtkRenderer>::New();
            vtkSmartPointer<vtkRenderWindow> renWin = vtkWidgetFixed1->GetRenderWindow();
            vtkSmartPointer<vtkRenderWindowInteractor> iren = vtkWidgetFixed1->GetInteractor();
            renWin->AddRenderer(ren1);
            renWin->SetInteractor(iren);

            vtkImageMapToWindowLevelColors *m_WLFilter = vtkImageMapToWindowLevelColors::New();
            m_WLFilter->SetOutputFormatToLuminance();
            m_WLFilter->SetInput( wipe->GetOutput() );
            m_WLFilter->SetWindow(1000.0);
            m_WLFilter->SetWindow(400.0);
            m_WLFilter->UpdateWholeExtent();

            vtkSmartPointer<vtkImageActor> wipeActor = vtkSmartPointer<vtkImageActor>::New();
            wipeActor->SetInput(m_WLFilter->GetOutput());

            vtkSmartPointer<vtkRectilinearWipeWidget> wipeWidget = vtkSmartPointer<vtkRectilinearWipeWidget>::New();
            wipeWidget->SetInteractor(iren);

            vtkRectilinearWipeRepresentation *wipeWidgetRep= static_cast<vtkRectilinearWipeRepresentation *>(wipeWidget->GetRepresentation());

            wipeWidgetRep->SetImageActor(wipeActor);
            wipeWidgetRep->SetRectilinearWipe(wipe);
            wipeWidgetRep->GetProperty()->SetLineWidth(2.0);
            wipeWidgetRep->GetProperty()->SetOpacity(0.75);

            ren1->AddActor(wipeActor);
            ren1->SetBackground(0.1, 0.2, 0.4);

            iren->Initialize();
            renWin->Render();
            wipeWidget->On();