[vtkusers] Render Triangles from cell data (vtk)

[vacingforo]

Testing the following funcion I only get one triangle of a polydata model
with the following assigned ids:

*    triangle->GetPointIds()->InsertNextId(0);
    triangle->GetPointIds()->InsertNextId(1);
    triangle->GetPointIds()->InsertNextId(2);*

I would like to render all triangles of a polydata model in funtion of
*
     trianglePoints = polydata->GetCell(tuple)->GetPoints();
    vtkSmartPointer<vtkIdList> trianglePointIds =
polydata->GetCell(tuple)->GetPointIds(*);

The problem is that it only render one triangle.

*void Test::TestPolyData(vtkSmartPointer<vtkPolyData> polydata)
{

    auto normals = polydata->GetCellData()->GetNormals();
    vtkPoints * trianglePoints{nullptr};

    vtkSmartPointer<vtkRenderer> renderer =
      vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow =
      vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer(renderer);
    vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
      vtkSmartPointer<vtkRenderWindowInteractor>::New();
    renderWindowInteractor->SetRenderWindow(renderWindow);
    int index = 0;
    for (auto tuple = 0; tuple < normals->GetNumberOfTuples(); ++tuple)
    {
    trianglePoints = polydata->GetCell(tuple)->GetPoints();
    vtkSmartPointer<vtkIdList> trianglePointIds =
polydata->GetCell(tuple)->GetPointIds();



        vtkSmartPointer<vtkTriangle> triangle =
          vtkSmartPointer<vtkTriangle>::New();

        //triangle->GetPointIds()->InsertNextId(trianglePointIds->GetId(0));
        //triangle->GetPointIds()->InsertNextId(trianglePointIds->GetId(1));
        //triangle->GetPointIds()->InsertNextId(trianglePointIds->GetId(2));

        triangle->GetPointIds()->InsertNextId(0);
        triangle->GetPointIds()->InsertNextId(1);
        triangle->GetPointIds()->InsertNextId(2);

        vtkSmartPointer<vtkCellArray> triangles =
          vtkSmartPointer<vtkCellArray>::New();
        triangles->InsertNextCell ( triangle );

        vtkSmartPointer<vtkPolyData> polydata =
          vtkSmartPointer<vtkPolyData>::New();
        polydata->SetPoints(trianglePoints);
        polydata->SetPolys ( triangles );

        // Visualize
        vtkSmartPointer<vtkPolyDataMapper> mapper =
          vtkSmartPointer<vtkPolyDataMapper>::New();

        mapper->SetInputData(polydata);

        vtkSmartPointer<vtkActor> actor =
          vtkSmartPointer<vtkActor>::New();
        actor->SetMapper(mapper);
        renderer->AddActor(actor);

    }

    renderer->SetBackground(.1, .2, .4); // Background color dark blue

    // Render and interact
    renderWindow->Render();
    renderWindowInteractor->Start();

}

*



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html