Ok, but I'll need vtkImageData to use it as input of another object, how could I get vtkTransformFilter output to build and imagedata object ?<br><br>thanks<br><div class="gmail_quote">2012/6/29 David E DeMarle <span dir="ltr"><<a href="mailto:dave.demarle@kitware.com" target="_blank">dave.demarle@kitware.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">vtkImageData is defined to be axis aligned so it can not be<br>
arbitrarily transformed. Thus the cast in:<br>
<div class="im"> vtkimageData test = (vtkImageData) work_axis.GetOutputDataObject(0);<br>
</div>can not work.<br>
<br>
Try:<br>
vtkStructuredGrid test = (vtkStructuredGrid) work_axis.GetOutputDataObject(0);<br>
instead.<br>
<span class="HOEnZb"><font color="#888888"><br>
David E DeMarle<br>
Kitware, Inc.<br>
R&D Engineer<br>
21 Corporate Drive<br>
Clifton Park, NY 12065-8662<br>
Phone: 518-881-4909<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
On Fri, Jun 29, 2012 at 11:12 AM, David Doria <<a href="mailto:daviddoria@gmail.com">daviddoria@gmail.com</a>> wrote:<br>
> On Fri, Jun 29, 2012 at 11:10 AM, Jonathan Ruiz Peinado<br>
> <<a href="mailto:jonathan.ruiz3@gmail.com">jonathan.ruiz3@gmail.com</a>> wrote:<br>
>> Sure,<br>
>><br>
>> I think that I'm not getting the output from vtkTransformFilter correctly, I<br>
>> did it the simplest way I though to see if I was lucky but seems that is not<br>
>> that easy.<br>
>><br>
>> Thinking a bit more I guess that vtkDataImage has to be built using the<br>
>> output , but not sure how.<br>
>><br>
>> ---------------------------------------------------<br>
>><br>
>> vtkTransform work_axis_transform = new vtkTransform();<br>
>> work_axis_transform.Translate(0,0,0);<br>
>><br>
>> vtkTransformFilter work_axis = new vtkTransformFilter();<br>
>> work_axis.SetTransform(work_axis_transform);<br>
>><br>
>> work_axis.SetInput(DicomStudio.dicomImage.getOutput());<br>
>> vtkimageData test = (vtkImageData) work_axis.GetOutputDataObject(0);<br>
>> test.GetSpacing();<br>
>> ----------------------------------------------------------------------------------------------------------<br>
>><br>
>> test.getSpacing(); trying to access to a null pointer.<br>
>><br>
>> Thanks.<br>
><br>
> Try calling work_axis.Update() before trying to use any of its outputs.<br>
><br>
> David<br>
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