[vtkusers] How do I convert a vtkExtractVOI to vtkDataset? or using in a vtkProbe

Robert Belleman robbel at science.uva.nl
Thu Apr 3 09:24:57 EST 2003


> I have a 'vtkImageData' that I 'clipped' with 'SetVOI' to get a smaller
> datacube. The result is a 'vtkExtractVOI' that I can use in the graphics
> pipeline.

The *class* you use is called vtkExtractVOI.
Its *result* (or "output") is of type vtkImageData.

> I want to use 'vtkProbeFilter' to 'shoot' a line through the dataset and
> draw an XYPlot. It works for my complete dataset (the 'vtkImageData'),
> but not for my clipped dataset (the 'vtkExtractVOI').
> My problem is that 'probe->SetSource' requires a 'vtkDataset' and not a
> 'vtkExtractVOI'. I tried this to cast it to 'vtkDataSet', but I get a
> 'segmentation fault' when I run.

You should pass the output of vtkExtractVOI to the probe, not
the class itself. I.e.


-- Rob

[] Robert Belleman         X  Section Computational Science            []
[] robbel at science.uva.nl  |X| University of Amsterdam, the Netherlands []
[] tel: (+31) 20 525 7510  X  http://www.science.uva.nl/~robbel/       []

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