[Paraview] Whole extend issue

[Fred Fred]

Ok but I suppose I don't do it as I should because the CopyDefaultInformation() is never executed.
I put these lines at the beginning of my class constructor:{  vtkMyStreamingDemandDrivenPipeline *executive = vtkMyStreamingDemandDrivenPipeline::New();  this->SetExecutive(executive);  ...
and I make a printf here:
//----------------------------------------------------------------------------voidvtkMyStreamingDemandDrivenPipeline::CopyDefaultInformation(vtkInformation* request, int direction,                         vtkInformationVector** inInfoVec,                         vtkInformationVector* outInfoVec){  // Let the superclass copy first.  this->Superclass::CopyDefaultInformation(request, direction,                                           inInfoVec, outInfoVec);    if(request->Has(REQUEST_INFORMATION()))    {    if(this->GetNumberOfInputPorts() > 0)      {      // my stuff      }
  for (int obj=0 ; obj<3 ; obj++) {    vtkInformation* outInfo = outInfoVec->GetInformationObject(obj);    int whole_ext[6];    outInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), whole_ext);    printf("Executive: %d %d %d %d %d %d\n", whole_ext[0], whole_ext[1], whole_ext[2], whole_ext[3], whole_ext[4], whole_ext[5]);  }
  ...}
but nothing prints and I still get the same error.

> From: dave.demarle at kitware.com
> Date: Mon, 14 Nov 2011 10:31:27 -0500
> Subject: Re: [Paraview] Whole extend issue
> To: stan1313 at hotmail.fr
> CC: paraview at paraview.org
> 
> Looks to me like a bug/feature of the VTK pipeline. Apparently it
> expects whole extents to be the same for all input structured data
> sets.
> 
> See how just before vtkExecutive runs the algorithm's Request*()
> methods in vtkExecutive::CallAlgorithm() it calls
> CopyDefaultInformation(). In
> vtkStreamingDemandDrivenPipeline::CopyDefaultInformation() copies the
> first input's whole extent to all outputs.
> 
> You might get around this by making your own executive with it's own
> CopyDefaultInformation().
> 
> The actual error comes later at the start of the RequestUpdateExtent()
> pass when vtkStreamingDemandDrivenPipeline::VerifyOutputInformation()
> happens.
> 
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
> 
> 
> 
> On Sat, Nov 12, 2011 at 5:17 AM, Fred Fred <stan1313 at hotmail.fr> wrote:
> > I really do not understand how PV/VTK works!
> > I get this error:
> > ERROR: In
> > /usr/local/ParaView-3.10.1/VTK/Filtering/vtkStreamingDemandDrivenPipeline.cxx,
> > line 882
> > vtkPVPostFilterExecutive (0x12a1c6b00): The update extent specified in the
> > information for output port 0 on algorithm vtkPVPostFilter(0x12a1c60c0) is 0
> > 24 0 34 0 232, which is outside the whole extent 0 96 0 20 0 63.
> > but if I print the values at the end of RequestData() I get different
> > values:
> >   int uExtent[6];
> >
> > this->GetExecutive()->GetOutputInformation(0)->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),
> > uExtent);
> >   printf("Extent: %d", uExtent[0]);
> >   for (int i=1 ; i<5 ; i++) printf(" %d", uExtent[i]);
> >   printf(" %d\n", uExtent[5]);
> >
> > this->GetExecutive()->GetOutputInformation(0)->Get(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(),
> > uExtent);
> >   printf("Update: %d", uExtent[0]);
> >   for (int i=1 ; i<5 ; i++) printf(" %d", uExtent[i]);
> >   printf(" %d\n", uExtent[5]);
> > prints:
> > Extent: 0 24 0 34 0 232
> > Update: 0 24 0 34 0 232
> > Please help!
> > ________________________________
> > From: stan1313 at hotmail.fr
> > To: paraview at paraview.org
> > Date: Fri, 11 Nov 2011 12:08:24 +0100
> > Subject: [Paraview] Whole extend issue
> >
> > Hello,
> > I have a filter inherited from vtkUnstructuredGridAlgorithm, with 2 inputs
> > of type vtkStructuredGrid and 3 outputs, 1 and 2 are just copies of the
> > input and the third one is of type vtkUnstructuredGrid.
> > I copy input0 to output0 like this:
> >   vtkInformation *in0Info = inputVector[0]->GetInformationObject(0);
> >   vtkStructuredGrid *in0 =
> > vtkStructuredGrid::SafeDownCast(coarseInfo->Get(vtkDataObject::DATA_OBJECT()));
> >   this->GetExecutive()->GetOutputData(0)->ShallowCopy(in0);
> >   vtkInformation *in1Info = inputVector[1]->GetInformationObject(0);
> >   vtkStructuredGrid *in1 =
> > vtkStructuredGrid::SafeDownCast(coarseInfo->Get(vtkDataObject::DATA_OBJECT()));
> >   this->GetExecutive()->GetOutputData(1)->ShallowCopy(in1);
> > but I get this error:
> > ERROR: In
> > /usr/local/ParaView-3.10.1/VTK/Filtering/vtkStreamingDemandDrivenPipeline.cxx,
> > line 882
> > vtkPVPostFilterExecutive (0x12c3e58d0): The update extent specified in the
> > information for output port 0 on algorithm vtkPVPostFilter(0x12c3e4e90) is 0
> > 24 0 34 0 232, which is outside the whole extent 0 96 0 20 0 63.
> > Actually 0 24 0 34 0 232 are the dimensions of input0 and 0 96 0 20 0 63 are
> > the dimensions of input1.
> > So I do not understand why extends of input1 are considered as the "whole
> > extend" (BTW what is the "whole extend"? whole extend of the multblock
> > dataset?)
> >
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