[vtkusers] Problem to Visualize vtk directed graph with provided vtkPoints

[Sonali Patil]

I have written the code to visualize the Directed graph which works fine if
I use some default layout and fails if I provide vtkPoints and use pass
through strategy i.e. I get undirected graph

The following is my code snippet:

//DirectedG->SetPoints(points);

        DirectedG->GetVertexData()->AddArray(label);

        DirectedG->GetEdgeData()->AddArray(edgeColors);

               vtkSmartPointer<vtkGraphLayout> layout =
vtkSmartPointer<vtkGraphLayout>::New();

         vtkSmartPointer<vtkSimple2DLayoutStrategy> strategy =
vtkSmartPointer<vtkSimple2DLayoutStrategy>::New();


              layout->SetInput(DirectedG);

              layout->SetLayoutStrategy(strategy);

              layout->Update();


        vtkSmartPointer<vtkGraphLayoutView> graphLayoutView =
vtkSmartPointer<vtkGraphLayoutView>::New();

        graphLayoutView->SetLayoutStrategyToPassThrough();


        graphLayoutView->SetEdgeLayoutStrategyToPassThrough();

        graphLayoutView->ScaledGlyphsOn();

        graphLayoutView->SetScalingArrayName("Scales");

        graphLayoutView->SetEdgeColorArrayName("Color");

        graphLayoutView->ColorEdgesOn();

        // Add the graph to the view. This will render vertices and edges,

        // but not edge arrows.

        graphLayoutView->AddRepresentationFromInputConnection(layout->GetOutputPort());

        //graphLayoutView->AddRepresentationFromInput(DirectedG);

        vtkSmartPointer<vtkGraphToPolyData> graphToPoly =

          vtkSmartPointer<vtkGraphToPolyData>::New();

       graphToPoly->SetInputConnection(layout->GetOutputPort());

         //graphToPoly->SetInput(DirectedG);

        graphToPoly->EdgeGlyphOutputOn();

         graphToPoly->SetEdgeGlyphPosition(0.98);

         graphToPoly->Update();

         // Make a simple edge arrow for glyphing.

         vtkSmartPointer<vtkGlyphSource2D> arrowSource =
vtkSmartPointer<vtkGlyphSource2D>::New();

         arrowSource->SetGlyphTypeToEdgeArrow();

         arrowSource->SetScale(0.1);

         arrowSource->SetColor(1,0,0);

         arrowSource->Update();


         vtkSmartPointer<vtkGlyph3D> arrowGlyph =

           vtkSmartPointer<vtkGlyph3D>::New();

         arrowGlyph->SetInputConnection(0, graphToPoly->GetOutputPort(1));

         arrowGlyph->SetInputConnection(1, arrowSource->GetOutputPort());

         arrowGlyph->Update();

         // Add the edge arrow actor to the view.

         vtkSmartPointer<vtkPolyDataMapper> arrowMapper =

           vtkSmartPointer<vtkPolyDataMapper>::New();

         arrowMapper->SetInputConnection(arrowGlyph->GetOutputPort());

         //arrowMapper->SetInputConnection(graphToPolyData->GetOutputPort());

         vtkSmartPointer<vtkActor> arrowActor =

           vtkSmartPointer<vtkActor>::New();

         arrowActor->SetMapper(arrowMapper);

         //arrowActor->GetProperty()->SetColor(0,0,1);

         graphLayoutView->SetVertexLabelVisibility(true);

         graphLayoutView->SetVertexLabelArrayName("node label");

         graphLayoutView->GetRenderer()->AddActor(arrowActor);

         vtkSmartPointer<vtkViewTheme> theme =

                 vtkSmartPointer<vtkViewTheme>::New();

         theme->SetCellLookupTable(lookupTable);

         graphLayoutView->ApplyViewTheme(theme);

         graphLayoutView->ResetCamera();

         graphLayoutView->Render();

         graphLayoutView->GetInteractor()->Start();



It works fine with default layout and when I uncomment
DirectedG->SetPoints(points);


line I do get new points position but then I don't get directed graph. I
tried to use the same code without using Graphlayout too i.e. trying to
render the polydata in the renderwindow but no success.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20120624/bbbf2aeb/attachment.htm>