[vtkusers] Confusion about GetOutputPort and GetOutput

[Eugen Wintersberger]

Hi there 
  its me again. I just had a look in "The Visualization Toolkit ....".
The book states that the usage of SetInput and GetOutput is highly
discouraged for VTK versions higher then 5.0. I use VTK 5.0.4 on an
Ubuntu 8.10 AMD64 installation. If I write my program using SetInput -
GetOutput I can easily access different attribute data from a dataset by
passing the index of the attribute data as an argument to the GetOutput
method of a dataset class. If I use, as recommended the GetOutputPort I
cannot use the index of attribute data. Can anyone explain me why this
is in this way or do I make a conceptual mistake?

regards
   Eugen
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| Dipl. Ing. Eugen Wintersberger           |
| Department of semicondutor physics       |
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