VTK/Examples/Cxx/Visualization/Visualize2DPoints

#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
#include <vtkPolyDataMapper2D.h>
#include <vtkActor2D.h>
#include <vtkMath.h>
#include <vtkProperty2D.h>
#include <vtkCellArray.h>
#include <vtkPolyData.h>
#include <vtkXMLPolyDataReader.h>
 
int main(int argc, char* argv[])
{
  if(argc != 2)
    {
    std::cout << "Required parameters: Filename" << std::endl;
    return EXIT_FAILURE;
    }
 
  std::string inputFilename = argv[1];
 
  vtkSmartPointer<vtkXMLPolyDataReader> reader =
    vtkSmartPointer<vtkXMLPolyDataReader>::New();
  reader->SetFileName(inputFilename.c_str());
  reader->Update();
  vtkPolyData* polydata = reader->GetOutput();
  //vtkPoints* Points = Polydata->GetPoints();
 
  vtkSmartPointer<vtkActor2D> actor =
    vtkSmartPointer<vtkActor2D>::New();
  double color[3] = {1,1,1};
 
  vtkSmartPointer<vtkPolyDataMapper2D> mapper =
    vtkSmartPointer<vtkPolyDataMapper2D>::New();
#if VTK_MAJOR_VERSION <= 5
  mapper->SetInput( polydata );
#else
  mapper->SetInputData( polydata );
#endif
  mapper->ScalarVisibilityOff();
  actor->SetMapper( mapper );
  actor->GetProperty()->SetColor( color );
 
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(actor);
 
  // Renderer and RenderWindow
  renderer->SetBackground( 0, 0, 0);
  renderer->ResetCamera();
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
 
  renderWindow->SetSize( 200,200 );
  renderWindow->AddRenderer( renderer );
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow( renderWindow );
 
  renderWindow->Render();
  renderWindowInteractor->Initialize();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}