[vtkusers] vtkTransformPolydataFilter ... how to get the transformed results

[Giancarlo Amati]

Hello everybody,

I have a vtkLineSource object L1. I apply a transformation with the vtkTransformPolyDataFilter tpd.

so... as L1 is defined by 2 points, I have a transform TT which defines the TransformPolyDataFilter.
So I need to retrieve those 2 points but after the transform, so I call:

vtkSmartPointer<vtkLineSource> tmplineDir = vtkLineSource::SafeDownCast(tpd->GetOutput());

but the pointer it returns is NULL, causing of course a crash of the software.
what am I missing? :)

Many thanks.
Giancarlo

 		 	   		  
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