stl 原图

vtkFeatureEdges

vtkNew<vtkFeatureEdges> featureEdges;
    featureEdges->SetInputData(mStlPolyData);
    featureEdges->BoundaryEdgesOn();
    featureEdges->FeatureEdgesOn();
    featureEdges->ManifoldEdgesOff();
    featureEdges->NonManifoldEdgesOff();
    featureEdges->ColoringOn();
    featureEdges->Update();

 vtkExtractEdges

vtkNew<vtkExtractEdges> extractEdges;
    extractEdges->SetInputData(mStlPolyData);
    extractEdges->Update();