[Paraview] problems with ServerManagerConfiguration and vtkImageReslice

[Dominik Szczerba]

I think my theory that it has to do with threading may be correct...

I just tried instead of my custom plugin to run the built-in Gradient
or Median on my vtkImageData and Paraview (3.11) silently segfaults.
Both these built-in filters derive from vtkThreadedImageAlgorithm.
Built-in vtkExtractVOI. however, works correctly, just as my other
custom plugins deriving from vtkImageAlgorithm.

Any pointers in this bug hunting are appreciated.

Dominik

On Thu, May 19, 2011 at 9:30 PM, Dominik Szczerba <dominik at itis.ethz.ch> wrote:
> So far I was able to add a few simple custom plugins, but am slowly
> losing the grip.
> I am trying to resample an image like this:
>
> <SourceProxy name="ImageResample" class="vtkImageResample"
> label="ImageResample">
> <InputProperty name="Input" command="SetInputConnection">
>        <ProxyGroupDomain name="groups">
>                <Group name="sources"/>
>                <Group name="filters"/>
>        </ProxyGroupDomain>
>        <DataTypeDomain name="input_type">
>                <DataType value="vtkImageData"/>
>        </DataTypeDomain>
> </InputProperty>
> <DoubleVectorProperty name="Magnification Factor"
> command="SetAxisMagnificationFactor" number_of_elements="3"
> number_of_elements_per_command="1" repeat_command="1" use_index="1"
> default_values="1 1 1"/>
>
> I get these 2 problems:
>
> 1) There appear two (!) outputs (named Output-0 and Output-1). I get
> this message:
>
> ERROR: In /home/dsz/pack/ParaView/VTK/Filtering/vtkDemandDrivenPipeline.cxx,
> line 827
> vtkPVPostFilterExecutive (0x3aa4f60): Input for connection index 0 on
> input port index 0 for algorithm vtkPVPostFilter(0x2cfb850) is of type
> vtkImageStencilData, but a vtkDataSet is required.
>
> 2) The first output has the expected Spacing, but it does not contain
> the same scalar array as in the input. Instead, it contains a new
> array ImageScalars ranging [0,0]. I get this message:
>
> Warning: In /home/dsz/pack/ParaView/ParaViewCore/VTKExtensions/vtkTexturePainter.cxx,
> line 179
> vtkTexturePainter (0x339fa70): Failed to locate selected scalars. Will
> use image scalars by default.
>
> I have been so far successful with other image algorithms, however
> they were all deriving from vtkImageAlgorithm. This one derives from
> vtkThreadedImageAlgorithm - could this have anything to do here?
> Could anyone point me into the right direction? After inspection of
> the xml files in the ParaView source tree I am still clueless.
>
> Thanks and regards,
> Dominik
>