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

[Jérôme]

Hi,
the output of a TransformPolyDataFilter is a vtkPolyData, and not a
vtkLineSource.

It should be better with this code:
vtkSmartPointer<vtkPolyData> transformedOutput = vtkPolyData::SafeDownCast(
tpd->GetOutput());

HTH
Jerome

2010/3/11 Giancarlo Amati <ilferraresebono at hotmail.it>

>  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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