[vtkusers] vtkstreamtracer on a surface

[kenichiro yoshimi]

Hi ZACK,

How about you try switching SurfaceStreamlines to on?
  streamer->SurfaceStreamlinesOn();

Regards

2018-02-24 2:34 GMT+09:00 ZACK <chihebz at hotmail.com>:
> Hi Guys,
>
> I have a problem displaying streamlines on outside surfaces of a volume. My
> streamlines are visible only on the inside volume. Any help will be much
> appreciated. below is an image to help explain the problem.
>
> Here are my unstructured girds stream tracer code:
>
>         vtkUnstructuredGrid * pGlobalUGrid =
> (vtkUnstructuredGrid*)m_pUnstructuredGridModel->GetOutput();
>         vtkSmartPointer<vtkPolyData> pPolydata =
> vtkSmartPointer<vtkPolyData>::New();
>
>         if (pGlobalUGrid != NULL)
>                 pPolydata->SetPoints(pGlobalUGrid->GetPoints());
>
>         // Source of the streamlines
>         vtkSmartPointer<vtkPointSource> seeds =
>                 vtkSmartPointer<vtkPointSource>::New();
>
>         seeds->SetRadius(0.2);
>         seeds->SetInput(pPolydata);
>         seeds->SetCenter(pPolydata->GetCenter());
>         seeds->SetNumberOfPoints(m_iNbrOsTreamPoints);
>
>
>         vtkSmartPointer<vtkRungeKutta4> sph_rk4 =
> vtkSmartPointer<vtkRungeKutta4>::New();
>
>         vtkSmartPointer<vtkStreamTracer> streamer =
> vtkSmartPointer<vtkStreamTracer>::New();
>
> streamer->SetInputConnection(m_pUnstructuredGridModel->GetOutputPort());
>         streamer->SetStartPosition(0.0, 0.0, 0.0);
>         streamer->SetSourceConnection(seeds->GetOutputPort());
>         streamer->SetMaximumPropagation(100);
>         streamer->SetIntegrator(sph_rk4);
>         streamer->SetIntegratorTypeToRungeKutta4();
>         streamer->SetMinimumIntegrationStep(m_CurrentMinValue);
>         streamer->SetMaximumIntegrationStep(m_CurrentMaxValue);
>         streamer->SetIntegrationDirectionToBoth();
>         streamer->SetComputeVorticity(false);
>         streamer->Modified();
>
>
> What you think, I am missing in my code??
>
> <http://vtk.1045678.n5.nabble.com/file/t342218/StreamTracer_problem.png>
>
>
>
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