[vtkusers] VTK 6.2.0 Bug in vtkVRMLImporter, example crashes if there are more than one instance of vtkVRMLImporter

[Arnaud Gelas]

Hi all,

We have slightly modified the following wiki example:

	http://www.itk.org/Wiki/VTK/Examples/Cxx/IO/VRML <http://www.itk.org/Wiki/VTK/Examples/Cxx/IO/VRML>


As follows:

	
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkVRMLImporter.h>
#include <vtkDataSet.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
 
int main ( int argc, char *argv[])
{
  if(argc != 2)
    {
    std::cout << "Required arguments: Filename" << std::endl;
    return EXIT_FAILURE;
    }
 
  std::string filename = argv[1];
  std::cout << "Reading " << filename << std::endl;
 
  vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
 
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  // VRML Import
  vtkSmartPointer<vtkVRMLImporter> importer = vtkSmartPointer<vtkVRMLImporter>::New();
  importer->SetFileName ( filename.c_str() );
  importer->SetRenderWindow(renderWindow);
  importer->Update();
 
  renderWindow->Render();
  renderWindowInteractor->Start();

  vtkSmartPointer<vtkRenderer> renderer2 = vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow2 = vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow2->AddRenderer(renderer2);
 
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor2 = vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor2->SetRenderWindow(renderWindow2);
 
  // VRML Import
  vtkSmartPointer<vtkVRMLImporter> importer2 = vtkSmartPointer<vtkVRMLImporter>::New();
  importer2->SetFileName ( filename.c_str() );
  importer2->SetRenderWindow(renderWindow2);
  importer2->Update();
 
  renderWindow2->Render();
  renderWindowInteractor2->Start();


 
  return EXIT_SUCCESS;
}




As you can see the modification is quite simple, we have just created 2 instances of every objects…

This naive example crashes when exiting (trying to delete the second importer, i.e. importer2).

Any idea what could go wrong? and how to fix this bug?

Thanks in advance,
Best regards

Arnaud
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