[Paraview] TransformFilter problems

[Paul Edwards]

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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>