[vtkusers] two question, please advice

[Ali Habib]

Dear All ,

1. How to convert vtkvolume and vtkimagedata to vtkpolydata

2.while running the following  code , a warning appear :
 Generic Warning: In m:\dev\cur\vtkdotnet\branch\50\Common\vtkMath.cxx, line
394
Unable to factor linear system:

vtkSphereSource ^sphere = gcnew vtkSphereSource();
     sphere->SetRadius(1.0);
     sphere->SetThetaResolution(18);
     sphere->SetPhiResolution(18);
   vtkStripper ^v = gcnew vtkStripper();
   v->SetInputConnection(sphere->GetOutputPort());
   v->Update();
   vtkDelaunay3D ^v3 = gcnew vtkDelaunay3D();
   v3->SetInputConnection(v->GetOutputPort());
   v3->Update()

   vtkDataSetMapper ^mapper = gcnew vtkDataSetMapper();
   mapper->SetInputConnection(v3->GetOutputPort());
   vtkActor ^triangulation = gcnew vtkActor();
   triangulation->SetMapper(mapper);
   triangulation->GetProperty()->SetRepresentationToWireframe();
   // Create the standard rendering stuff.
   vtkRenderer ^ren1 = gcnew vtkRenderer();
   vtkRenderWindow ^renWin = gcnew vtkRenderWindow();
   renWin->AddRenderer(ren1);
   vtkRenderWindowInteractor ^iren = gcnew vtkRenderWindowInteractor();
   iren->SetRenderWindow(renWin);
   // Add the actors to the renderer, set the background and size
   //
   ren1->AddActor(triangulation);
   ren1->SetBackground(1, 1, 1);
   renWin->SetSize(300, 300);
   renWin->Render();

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

   iren->Start();

any advice please
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