VTK/Examples/Cxx/Visualization/MultipleRenderWindows

#include <vtkSmartPointer.h>
 
#include <vtkActor.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
 
#include <sstream>
#include <vector>
 
int main(int, char *[])
{
  std::vector<vtkSmartPointer<vtkRenderWindowInteractor> > interactors;
 
  for(unsigned int i = 0; i < 4; i++)
    {
    vtkSmartPointer<vtkRenderWindow> renderWindow = 
      vtkSmartPointer<vtkRenderWindow>::New();
 
    vtkSmartPointer<vtkRenderer> renderer =
      vtkSmartPointer<vtkRenderer>::New();
 
    renderWindow->AddRenderer(renderer);
 
    vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
      vtkSmartPointer<vtkRenderWindowInteractor>::New();
 
    interactors.push_back(renderWindowInteractor);
 
    renderWindowInteractor->SetRenderWindow(renderWindow);
    renderWindow->Render();
    std::stringstream ss;
    ss << "Window " << i;
    renderWindow->SetWindowName(ss.str().c_str());
    renderWindow->SetPosition(i*300,0);
 
    //create a sphere
    vtkSmartPointer<vtkSphereSource> sphereSource =
      vtkSmartPointer<vtkSphereSource>::New();
    sphereSource->SetCenter(0.0, 0.0, 0.0);
    sphereSource->SetRadius(5.0);
    sphereSource->Update();
 
    //Create a mapper and actor
    vtkSmartPointer<vtkPolyDataMapper> mapper = 
      vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection(sphereSource->GetOutputPort());
 
    vtkSmartPointer<vtkActor> actor =
      vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);
    renderer->AddActor(actor);
    renderer->ResetCamera();
    }
 
  interactors[3]->Start();
 
  return EXIT_SUCCESS;
}