VTK显示.vtk格式文件

void ReadandShowVTKFile ()
{
     vtkSmartPointer<vtkRenderer > aRenderer =
          vtkSmartPointer<vtkRenderer >::New();
     vtkSmartPointer<vtkRenderWindow > renWin =
          vtkSmartPointer<vtkRenderWindow >::New();
     renWin->AddRenderer (aRenderer);

     vtkSmartPointer<vtkRenderWindowInteractor > iren =
         vtkSmartPointer<vtkRenderWindowInteractor >::New();
     iren->SetRenderWindow (renWin);

     vtkSmartPointer<vtkPolyDataReader > vtkReader = vtkSmartPointer<vtkPolyDataReader >::New();
     vtkReader->SetFileName ("polyline.vtk");

     vtkSmartPointer<vtkPolyDataMapper > skinMapper = vtkSmartPointer<vtkPolyDataMapper >::New();
     skinMapper->SetInputConnection (vtkReader-> GetOutputPort());
     skinMapper->ScalarVisibilityOff ();    

     vtkSmartPointer<vtkActor > skin =
          vtkSmartPointer<vtkActor >::New();
     skin->SetMapper (skinMapper);

     vtkSmartPointer<vtkCamera > aCamera =
          vtkSmartPointer<vtkCamera >::New();
     aCamera->SetViewUp (, , -);
     aCamera->SetPosition (, , );
     aCamera->SetFocalPoint (, , );
     aCamera->ComputeViewPlaneNormal ();
     aCamera->Azimuth (30.0);
     aCamera->Elevation (30.0);
     aCamera->Dolly (1.5);

     aRenderer->AddActor (skin);
     aRenderer->SetActiveCamera (aCamera);
     aRenderer->ResetCamera ();
     aRenderer->SetBackground (., ., .);
     aRenderer->ResetCameraClippingRange ();

     renWin->Render ();
     iren->Initialize ();
     iren->Start ();
}