<div>Thanks David,</div>I probably should have mentioned, I am running 5.0.8. Thus, vtkImageData doesn't have an Allocate method, but it does have Initialize -- I have tried this with no luck.<div>Brett<br><br><div class="gmail_quote">
On Mon, May 14, 2012 at 7:10 PM, David Doria <span dir="ltr"><<a href="mailto:daviddoria@gmail.com" target="_blank">daviddoria@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="HOEnZb"><div class="h5">n Mon, May 14, 2012 at 2:05 PM, Brett Tully <<a href="mailto:brett.tully@oxyntix.com">brett.tully@oxyntix.com</a>> wrote:<br>
> I have been staring at this for a while and could be making a really dumb<br>
> error, but can anyone explain why the last line segfaults please...? I am<br>
> guessing that I need to initialise something?<br>
><br>
> vtkSmartPointer<vtkImageData> imageData<br>
> = vtkSmartPointer<vtkImageData>::New();<br>
> imageData->SetExtent(0, 10, 0, 10, 0, 0);<br>
> imageData->SetOrigin(0.0, 0.0, 0.0);<br>
> imageData->SetSpacing(0.1, 0.1, 0.0);<br>
> imageData->SetScalarTypeToDouble();<br>
> vtkSmartPointer<vtkCellData> cellData = imageData->GetCellData();<br>
> cout << cellData->GetNumberOfArrays() << endl;<br>
><br>
> Thanks,<br>
> Brett.<br>
<br>
</div></div>Try imageData->Allocate() before the GetCellData() call.<br>
<span class="HOEnZb"><font color="#888888"><br>
David<br>
</font></span></blockquote></div><br></div>