[vtkusers] vtkPolyDataWriter

[Luca Pallozzi Lavorante]

alletto at dei.unipd.it wrote:

>Hi all vtkusers,
>
>I tried to modify an actor  (a simple cube) translating and rotating it. I want 
>to keep this information into a file (.vtk) that I write by vtkPolyDataWriter 
>class, but I can't manage to do it.
>I can't save the changes of the actor, and the file contains always the same 
>cube...
>
>Can someone help me?
>
>Thank you in advance for your help.
>
>Michele Alletto
>
>
>
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Hi Michele,

you have to modify the geometry of your source object via the following 
pipeline:

vtkCubeSource
         |
 vtkTransformPolyDataFilter-vtkTransform
        |
 vtkPolyDataWriter

You will define translations and rotations using proper methods from the 
vtkTransform class. See vtkTransformPolyDataFilter and vtkTransform´s 
documentation.
The modifications you performed at the actor level didn´t affect its 
geometry in the pipeline. Therefore, when you tried to save it with 
vtkPolyDataWriter the object was not modified.


Hope this help

       Luca