[dune-pdelab] Sub-samling Vtk writer for composite grid functions

[Christoph Grüninger]

Dear PDELab people,
I have a CompositeGridFunction which contains a P0 element and some
higher order element. To get the latter right in the Vtk output, I use
sub-sampling with the refinement level of one.
This refines the output of my P0 element, too. Is there a way to refine
only some sub-functions but still having all sub-functions in the same file?

My current code:

> Dune::SubsamplingVTKWriter<SubDomainGridView> vtkWriterStokes(
>     this->sdGridViewStokes(), 1);
> vtkWriterStokes.addCellData(
>     new Dune::PDELab::VTKGridFunctionAdapter<DgfStokesVelocity>(dgfStokesVelocity, "velocity"));
> vtkWriterStokes.addCellData(
>     new Dune::PDELab::VTKGridFunctionAdapter<DgfStokesPressure>(dgfStokesPressure, "pressure"));

Bye
Christoph

-- 
The method has been developed for use on a high-speed electronic
computer and would be impractical for hand-solution purposes.
                                           [Harlow & Welch 1965]

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