[Paraview] TransformFilter problems

[Berk Geveci]

I am guessing it is failing in
vtkPointSetAlgorithm::RequestDataObject(). Try putting a breakpoint
there.

-berk

On Tue, Jun 10, 2008 at 10:37 AM, Paul Edwards <paul.m.edwards at gmail.com> wrote:
> The seg fault is because I just used the C++ delete rather than the
> VTK version, i.e. this->Transform->Delete() in the destructor.  So, I
> still have this error:
>
>>> Warning: In /home/paul/workspace/ParaView3/VTK/Filtering/vtkDataObject.cxx,
>>> line 908
>>> vtkMultiBlockDataSet (0x173da00): Attempted to ShallowCopy from null.
>
> Regards,
> Paul
>
> 2008/6/10 Berk Geveci <berk.geveci at kitware.com>:
>> Can you post the source code for the transform filter? It is somehow
>> failing (returning 0) during RequestDataObject() (which may be in the
>> superclass). Do you have that method implemented by any chance?
>>
>> -berk
>>
>> On Tue, Jun 10, 2008 at 8:06 AM, Paul Edwards <paul.m.edwards at gmail.com> wrote:
>>> I am trying to use a subclass of TransformFilter in one other Filters
>>> (subclass of vtkMultiBlockDataSetAlgorithm) in the RequestData method.
>>>  The RequestData looks like this:
>>>
>>> 8<----------------------------------------------------------
>>> int vtkFilter::RequestData(vtkInformation* info,
>>>                vtkInformationVector** vector,
>>>                vtkInformationVector* outputVector)
>>> {
>>>        vtkInformation* outInfo = outputVector->GetInformationObject(0);
>>>        vtkMultiBlockDataSet* output = vtkMultiBlockDataSet::SafeDownCast(
>>>            outInfo0->Get(vtkMultiBlockDataSet::DATA_OBJECT()));
>>>
>>>        vtkSmartPointer<vtkMyMultiBlockDataSetReader> reader =
>>> vtkSmartPointer<vtkMyMultiBlockDataSetReader>::New();
>>>        // setup reader here...
>>>        // .....
>>>        vtkSmartPointer<vtkXYZTransformFilter> transform =
>>> vtkSmartPointer<vtkXYZTransformFilter>::New();
>>>        transform->SetInput(reader->GetOutput());
>>>        transform->Update();
>>>        output->ShallowCopy(transform->GetOutput());
>>>        return 1;
>>> }
>>> ---------------------------------------------------------->8
>>>
>>> This filter above will work without the transform and the transform
>>> works as a filter in paraview but when I have it as above I get the
>>> following error:
>>>
>>> 8<----------------------------------------------------------
>>> ERROR: In /home/paul/workspace/ParaView3/VTK/Filtering/vtkExecutive.cxx,
>>> line 757
>>> vtkStreamingDemandDrivenPipeline (0x4a7b1b0): Algorithm
>>> vtkXYZTransformFilter(0x4a0c7a0) returned failure for request:
>>> vtkInformation (0x4a7a9a0)
>>>  Debug: Off
>>>  Modified Time: 202678
>>>  Reference Count: 1
>>>  Registered Events: (none)
>>>  Request: REQUEST_DATA_OBJECT
>>>  FORWARD_DIRECTION: 0
>>>  FROM_OUTPUT_PORT: 0
>>>  ALGORITHM_AFTER_FORWARD: 1
>>>
>>> ERROR: In /home/paul/workspace/ParaView3/VTK/Filtering/vtkExecutive.cxx,
>>> line 757
>>> vtkStreamingDemandDrivenPipeline (0x4a7b1b0): Algorithm
>>> vtkXYZTransformFilter(0x4a0c7a0) returned failure for request:
>>> vtkInformation (0x4a7a9a0)
>>>  Debug: Off
>>>  Modified Time: 202710
>>>  Reference Count: 1
>>>  Registered Events: (none)
>>>  Request: REQUEST_DATA_OBJECT
>>>  FORWARD_DIRECTION: 0
>>>  FROM_OUTPUT_PORT: 0
>>>  ALGORITHM_AFTER_FORWARD: 1
>>>
>>> Warning: In /home/paul/workspace/ParaView3/VTK/Filtering/vtkDataObject.cxx,
>>> line 908
>>> vtkMultiBlockDataSet (0x173da00): Attempted to ShallowCopy from null.
>>> ---------------------------------------------------------->8
>>>
>>> Can anyone see what I am doing wrong?
>>>
>>> Thanks in advance,
>>> Paul
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>>>
>>
>