[vtkusers] How to decrease the poly data element

[InfoSeekerr]

Dear All,

I read 78 DICOM files , and the result is a big vtkpolydata , which I can't
apply any filter on it because it give the attached error ( it's a snapshot) 
even using Vtkshrinkpolydata , the used code is:
	vtkRenderer *aRenderer = vtkRenderer::New();
	vtkRenderWindow *renWin = vtkRenderWindow::New();
	renWin->AddRenderer(aRenderer);
	vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
	iren->SetRenderWindow(renWin);

 
	vtkDICOMImageReader *v16 = vtkDICOMImageReader::New();
	v16->SetDirectoryName("C:\\1");
	v16->SetDataOrigin(0, 0, 0);
	v16->Update();

	vtkContourFilter *skinExtractor = vtkContourFilter::New();
	skinExtractor->SetInputConnection(v16->GetOutputPort());
	skinExtractor->SetValue(0, 500);
	vtkPolyDataNormals *skinNormals = vtkPolyDataNormals::New();
	skinNormals->SetInputConnection(skinExtractor->GetOutputPort());
	skinNormals->SetFeatureAngle(60.0);
	
	/////////////////////Decrease the dataset/////////////////////////////////

	vtkShrinkPolyData *shrink = vtkShrinkPolyData::New();
	shrink->SetInputConnection(skinNormals->GetOutputPort());
	shrink->SetShrinkFactor(0.90);

	vtkPolyDataToTetrahedralGrid* gridder =
vtkPolyDataToTetrahedralGrid::New();
	gridder->SetInputConnection(shrink->GetOutputPort());


	vtkDataSetMapper *skinMapper = vtkDataSetMapper::New();
	skinMapper->SetInputConnection(gridder->GetOutputPort());

	skinMapper->ScalarVisibilityOff();
	vtkActor *skin = vtkActor::New();
	skin->SetMapper(skinMapper);


	vtkCamera *aCamera = vtkCamera::New();
	aCamera->SetViewUp( 0, 0, -1);
	aCamera->SetPosition( 0, 1, 0);
	aCamera->SetFocalPoint( 0, 0, 0);
	aCamera->ComputeViewPlaneNormal();

	aRenderer->AddActor(skin);
	aRenderer->SetActiveCamera(aCamera);
	aRenderer->ResetCamera();
	aCamera->Dolly(1.5);


	renWin->SetSize(640, 480);

	aRenderer->ResetCameraClippingRange();



	iren->Initialize();

    return 0;
http://old.nabble.com/file/p26684126/error_screen.jpg error_screen.jpg 
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