[vtkusers] from cosmo to png without user interaction

[Ula Popov]

Hello all,

I have 5000 cosmo files that I need to visualize and save each as a .png
file.

If I had one file, I'd
1. open it in paraview
2. choose glyph filter
3. choose
     vector : velocity
     glyph type: arrow
     color by: glyphVector
4. press "reset" button
5. adjust camera -> azimuth (XX)
6. File->Save ScreenShot
7. type "output_filename"

I need to automate this process, but I don't know how.
I do know how to read cosmo file into unstructured grid,
how to create a window, but i don't know how to set
all these parameters and save an image.


int main ()
{
    vtkUnstructuredGrid *data;
    vtkSmartPointer<vtkCosmoReader> reader =
vtkSmartPointer<vtkCosmoReader>::New();

    reader->SetFileName("input_filename.cosmo");
    reader->Update();
    data = reader->GetOutput(0);

    vtkSmartPointer<vtkUnstructuredGridGeometryFilter> geometryFilter =
vtkSmartPointer<vtkUnstructuredGridGeometryFilter>::New();
    geometryFilter->SetInputConnection(data->GetOutputPort());
    geometryFilter->Update();

    //Create a mapper and actor
    vtkSmartPointer<vtkDataSetMapper> mapper =
vtkSmartPointer<vtkDataSetMapper>::New();
    mapper->SetInputConnection(geometryFilter->GetOutputPort());
    vtkSmartPointer<vtkActor> actor =  vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);

    // a renderer and render window
   vtkRenderer *ren = vtkRenderer::New();
   vtkRenderWindow *renWin = vtkRenderWindow::New();
   renWin->AddRenderer(ren);

   // an interactor
   vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
   iren->SetRenderWindow(renWin);

   // add the actor to the scene
   ren->AddActor(actor);
   ren->SetBackground(1,1,1); // Background color white

   renWin->Render();

  // begin mouse interaction
   iren->Start();

  ren1->Delete();
  renWin->Delete();
  iren->Delete();
  return EXIT_SUCCESS;
}


Any ideas, suggestions, code examples are highly appreciated,
ula
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