text: #include <vtkActor.h>
  #include <vtkIntersectionPolyDataFilter.h>
  #include <vtkPolyDataMapper.h>
  #include <vtkProperty.h>
  #include <vtkRenderer.h>
  #include <vtkRenderWindow.h>
  #include <vtkRenderWindowInteractor.h>
  #include <vtkSmartPointer.h>
  #include <vtkSphereSource.h>
  
  int main(int, char *[])
  {
    vtkSmartPointer<vtkSphereSource> sphereSource1 = vtkSmartPointer<vtkSphereSource>::New();
    sphereSource1->SetCenter(0.0, 0.0, 0.0);
    sphereSource1->SetRadius(2.0f);
    sphereSource1->Update();
    vtkSmartPointer<vtkPolyDataMapper> sphere1Mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    sphere1Mapper->SetInputConnection( sphereSource1->GetOutputPort() );
    sphere1Mapper->ScalarVisibilityOff();
    vtkSmartPointer<vtkActor> sphere1Actor = vtkSmartPointer<vtkActor>::New();
    sphere1Actor->SetMapper( sphere1Mapper );
    sphere1Actor->GetProperty()->SetOpacity(.3);
    sphere1Actor->GetProperty()->SetColor(1,0,0);
  
    vtkSmartPointer<vtkSphereSource> sphereSource2 = vtkSmartPointer<vtkSphereSource>::New();
    sphereSource2->SetCenter(1.0, 0.0, 0.0);
    sphereSource2->SetRadius(2.0f);
    vtkSmartPointer<vtkPolyDataMapper> sphere2Mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    sphere2Mapper->SetInputConnection( sphereSource2->GetOutputPort() );
    sphere2Mapper->ScalarVisibilityOff();
    vtkSmartPointer<vtkActor> sphere2Actor = vtkSmartPointer<vtkActor>::New();
    sphere2Actor->SetMapper( sphere2Mapper );
    sphere2Actor->GetProperty()->SetOpacity(.3);
    sphere2Actor->GetProperty()->SetColor(0,1,0);
  
    vtkSmartPointer<vtkIntersectionPolyDataFilter> intersectionPolyDataFilter =
      vtkSmartPointer<vtkIntersectionPolyDataFilter>::New();
    intersectionPolyDataFilter->SetInputConnection( 0, sphereSource1->GetOutputPort() );
    intersectionPolyDataFilter->SetInputConnection( 1, sphereSource2->GetOutputPort() );
    intersectionPolyDataFilter->Update();
  
    vtkSmartPointer<vtkPolyDataMapper> intersectionMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    intersectionMapper->SetInputConnection( intersectionPolyDataFilter->GetOutputPort() );
    intersectionMapper->ScalarVisibilityOff();
  
    vtkSmartPointer<vtkActor> intersectionActor = vtkSmartPointer<vtkActor>::New();
    intersectionActor->SetMapper( intersectionMapper );
  
    vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
    renderer->AddViewProp(sphere1Actor);
    renderer->AddViewProp(sphere2Actor);
    renderer->AddViewProp(intersectionActor);
  
    vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer( renderer );
  
    vtkSmartPointer<vtkRenderWindowInteractor> renWinInteractor =
      vtkSmartPointer<vtkRenderWindowInteractor>::New();
    renWinInteractor->SetRenderWindow( renderWindow );
  
    renderWindow->Render();
    renWinInteractor->Start();
  
    return EXIT_SUCCESS;
  }
  