text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkPLinearExtrusionFilter.cxx
  
    Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
    All rights reserved.
    See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
  
       This software is distributed WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.  See the above copyright notice for more information.
  
  =========================================================================*/
  #include "vtkPLinearExtrusionFilter.h"
  
  #include "vtkInformation.h"
  #include "vtkInformationVector.h"
  #include "vtkObjectFactory.h"
  #include "vtkPolyData.h"
  #include "vtkStreamingDemandDrivenPipeline.h"
  
  vtkStandardNewMacro(vtkPLinearExtrusionFilter);
  
  //----------------------------------------------------------------------------
  vtkPLinearExtrusionFilter::vtkPLinearExtrusionFilter()
  {
    // Since I do not thing the visual impact of invariance is significant,
    // we will default to not spend the extra effort to get the
    // extra layer of ghost cells.
    this->PieceInvariant = 0;
  }
  
  //----------------------------------------------------------------------------
  int vtkPLinearExtrusionFilter::RequestData(
    vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
  {
    if (!this->vtkLinearExtrusionFilter::RequestData(request, inputVector, outputVector))
    {
      return 0;
    }
  
    return 1;
  }
  
  //--------------------------------------------------------------------------
  int vtkPLinearExtrusionFilter::RequestUpdateExtent(vtkInformation* vtkNotUsed(request),
    vtkInformationVector** inputVector, vtkInformationVector* outputVector)
  {
    vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
    vtkInformation* outInfo = outputVector->GetInformationObject(0);
  
    inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER(),
      outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER()));
    inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES(),
      outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES()));
  
    int ghostLevel = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS());
  
    if (this->PieceInvariant)
    {
      inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS(), ghostLevel + 1);
    }
    else
    {
      inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS(), ghostLevel);
    }
  
    return 1;
  }
  
  //----------------------------------------------------------------------------
  void vtkPLinearExtrusionFilter::PrintSelf(ostream& os, vtkIndent indent)
  {
    this->Superclass::PrintSelf(os, indent);
  
    os << indent << "PieceInvariant: " << this->PieceInvariant << "\n";
  }
  