[vtkusers] vtkAppendPolyData

[Yianis Nikolaou]

> 
> How can I transform vtkAppendPolyData with all the vtkPolyData into a single
> vtkPolyData or something like this?
> 

use vtkAppendPolyData->GetOutput();

before that you might have to call vtkAppendPolyData->Update()
to force the update of the pipeline

yianis nikolaou