VTK/Examples/Developers/Broken/MultipleOutputConnections

#include <vtkSmartPointer.h>
#include "vtkTestFilter.h"
 
int main(int, char*[])
{
  //setup the second input
  vtkSmartPointer<vtkPoints> points =
    vtkSmartPointer<vtkPoints>::New();
  points->InsertNextPoint(4.0, 5.0, 6.0);
  vtkSmartPointer<vtkPolyData> polydata =
    vtkSmartPointer<vtkPolyData>::New();
  polydata->SetPoints(points);
 
  vtkSmartPointer<vtkTestFilter> filter =
    vtkSmartPointer<vtkTestFilter>::New();
  filter->SetInputConnection(polydata->GetProducerPort());
  filter->Update();
 
  vtkPolyData* output0 = filter->GetOutput(0);
  vtkPolyData* output1 = filter->GetOutput(1);
 
  std::cout << "Output0 has " << output0->GetNumberOfPoints() << " points." << std::endl;
  std::cout << "Output1 has " << output1->GetNumberOfPoints() << " points." << std::endl;
 
  return EXIT_SUCCESS;
}

// .NAME vtkTestFilter
// .SECTION Description
// vtkTestFilter
 
#ifndef __vtkTestFilter_h
#define __vtkTestFilter_h
 
#include "vtkPolyDataAlgorithm.h"
 
class vtkTestFilter : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkTestFilter,vtkPolyDataAlgorithm);
  static vtkTestFilter *New();
 
protected:
  vtkTestFilter(){}
  ~vtkTestFilter(){}
 
  //int FillOutputPortInformation( int port, vtkInformation* info );
  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
 
 
int RequestDataObject(
  vtkInformation*,
  vtkInformationVector** inputVector ,
  vtkInformationVector* outputVector);
 
 
private:
  vtkTestFilter(const vtkTestFilter&);  // Not implemented.
  void operator=(const vtkTestFilter&);  // Not implemented.
 
};
 
#endif

#include "vtkTestFilter.h"
 
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkInformationVector.h"
#include "vtkInformation.h"
#include "vtkDataObject.h"
#include "vtkSmartPointer.h"
 
vtkStandardNewMacro(vtkTestFilter);
 
/*
int vtkTestFilter::FillOutputPortInformation( int port, vtkInformation* info )
{
  if(port == 0)
  {
    info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkPolyData" );
    info->Set(vtkAlgorithm::OUTPUT_IS_REPEATABLE(), 1);
    return 1;
  }
 
  vtkErrorMacro("This filter does not have more than 1 output port!");
  return 0;
}
*/
 
int vtkTestFilter::RequestData(vtkInformation *vtkNotUsed(request),
                                             vtkInformationVector **inputVector,
                                             vtkInformationVector *outputVector)
{
 
  outputVector->SetNumberOfInformationObjects(2);
 
  // get the input info objects
  vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
 
  vtkInformation *outInfo0 = outputVector->GetInformationObject(0);
  vtkInformation *outInfo1 = outputVector->GetInformationObject(1);
 
  // get the output
  vtkPolyData *output0 = vtkPolyData::SafeDownCast(
    outInfo0->Get(vtkDataObject::DATA_OBJECT()));
  vtkPolyData *output1 = vtkPolyData::SafeDownCast(
    outInfo1->Get(vtkDataObject::DATA_OBJECT()));
 
  // get the input
  vtkPolyData *input = vtkPolyData::SafeDownCast(
    inInfo->Get(vtkDataObject::DATA_OBJECT()));
 
  output0->ShallowCopy(input);
 
  vtkSmartPointer<vtkPoints> points =
    vtkSmartPointer<vtkPoints>::New();
  points->InsertNextPoint(0,0,0);
  points->InsertNextPoint(0,0,1);
 
  vtkSmartPointer<vtkPolyData> polydata =
    vtkSmartPointer<vtkPolyData>::New();
  polydata->SetPoints(points);
 
  output1->ShallowCopy(polydata);
 
  return 1;
}
 
 
int vtkTestFilter::RequestDataObject(
  vtkInformation*,
  vtkInformationVector** inputVector ,
  vtkInformationVector* outputVector)
{
  vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
  if (!inInfo)
    {
    return 0;
    }
  vtkDataSet *input = vtkDataSet::SafeDownCast(
    inInfo->Get(vtkPolyData::DATA_OBJECT()));
 
  if (input)
    {
      std::cout << "There are " << outputVector->GetNumberOfInformationObjects() << " output info objects" << std::endl;
    for(int i=0; i < outputVector->GetNumberOfInformationObjects(); ++i)
      {
      vtkInformation* info = outputVector->GetInformationObject(0);
      vtkDataSet *output = vtkDataSet::SafeDownCast(
        info->Get(vtkDataObject::DATA_OBJECT()));
 
      if (!output || !output->IsA(input->GetClassName()))
        {
        vtkDataSet* newOutput = input->NewInstance();
        newOutput->SetPipelineInformation(info);
        newOutput->Delete();
        }
      return 1;
      }
    }
  return 0;
}