[vtkusers] Help writing a filter..

[David E DeMarle]

Keep a vtkPolyData * internal variable with the class, and shallow
copy the output you produce in RequestData into that to use next time
around.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909



On Sun, Mar 25, 2012 at 10:33 PM, Ricardo Villegas <ricvilleg at gmail.com> wrote:
> Hello,
>
> I'm writing a filter that receives an input polydata and produces its
> respective output polydata. However, the filter relies in recovering the
> output's point geometry every time the RequestData is invoked after the
> first time, in a similiar way vtkPolyDataSilhouette filter does, for
> changing the output points' coordinates.
>
> I noticed that after first time, every time the filter's RequestData is
> called the output data is lost or missing, so I can't call i.e.
> output->GetPoints( ), because the list of points is empty.
>
> Is there a way I can preserve the output data the filter generates so I can
> directly access and manipulate it in consecutive RequestData calls?
>
> Thanks in advance,
>
> Ricardo
>
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