PolyData from vtkReverseSense

[Randall A. Jones]

Hello.
  I am trying to use vtkReverseSense on a polygonal dataset, but I can't
find the resulting polygonal data that should be output from the filter.
any ideas?
here is a code snippet and output that demonstrates.
this is from a vtkPolyDataWriter subclass:
--
    vtkPolyData *input = this->GetInput();
    vtkReverseSense *reverse = vtkReverseSense::New();
    reverse->SetInput(input);
    reverse->ReverseCellsOn();

    vtkCellArray *inPolys = input->GetPolys();
    fprintf(stderr, "vtkLWOBWriter input->GetPolys: %d\n",
	    inPolys->GetNumberOfCells());

    vtkPolyData *reversed = reverse->GetOutput();
    inPolys = reversed->GetPolys();
    fprintf(stderr, "vtkReverseSense reversed->GetPolys: %d\n",
	    inPolys->GetNumberOfCells());

--
output:

vtkLWOBWriter input->GetPolys: 11140
vtkReverseSense reversed->GetPolys: 0
-- 

Thanks,
Randall
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