[vtkusers] Converting code to a vtk filter

[Jeff Baumes]

On Tue, Aug 11, 2009 at 10:29 AM, David Doria
<daviddoria+vtk at gmail.com<daviddoria%2Bvtk at gmail.com>
> wrote:

>     output = this->GetOutputPolyData();
>

You need to modify the output object itself. Here you are just setting a
pointer and leaving the true output object unchanged. You should pass the
output object pointer to GetOutputPolyData(), and fill that poly data
instead of creating a new one.
Jeff
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