[vtkusers] from cosmo to png without user interaction

[Bill Lorensen]

This example:
http://vtk.org/Wiki/VTK/Examples/Cxx/Utilities/Screenshot

shows how to save a rendered image into a file.

Bill

On Thu, Mar 10, 2011 at 12:25 AM, Ula Popov <ula.popov at gmail.com> wrote:
> 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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