[vtkusers] How can I connect a vtkPolydata object with vtkExtractPolyDataGeometry?

[Bo Shi]

Hi,

        Can GetGetProducerPort of vtkPolydata work? My source code are as
follows:



     CVtkArchitectureDoc* pDoc = GetDocument();

    double normalViewPlane[3];

    pvtkRenderer->GetActiveCamera()->GetViewPlaneNormal(normalViewPlane);
    vtkPolyData* polydata =  pDoc->m_polyData;
    m_ImplicitSelectionLoop->SetLoop(m_pointLoop);
    m_ImplicitSelectionLoop->SetNormal(normalViewPlane);


m_extractPolyDataGemetry->SetInputConnection(polydata->GetProducerPort());
    m_extractPolyDataGemetry->SetImplicitFunction(m_ImplicitSelectionLoop);


m_polyDataMapper->SetInputConnection(m_extractPolyDataGemetry->GetOutputPort());
....................................



    But i can't see the clip result? Who can tell me why? I use the
following code to build

the vtkPolydata object:


    for (int n=0;n<m_nPts;n++)
    {
        libraryFile.Read(p,24);
        m_points->InsertPoint(n,p[0],p[1],p[2]);
    }

    m_polyData->SetPoints(m_points);

    int* ptId = new int[m_nPts];

    for (n=0;n<m_nPts;n++)
    {
        ptId[n]=n;
    }

    m_cellArray->InsertNextCell(m_nPts, ptId);

    delete []ptId;

    //构建拓扑结构

    m_polyData->SetVerts(m_cellArray);



BoShi
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