[Paraview] 3D Hole filling Plugin

[Abdullahi Sanusi]

Hi All,
Please how can a I fill holes in my Polydata.  I worked through the
vtkHoleFillFilter documentation and tried to create ParaView plugin to fill
the in my data but it did not work for me as expected. I get back the same
input data as my output (no difference). I am doing something wrong. Pardon
me if this question has been answered because I am still new using VTK.
Here is my code:

#include "vtkHolefill.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPolyDataAlgorithm.h"
#include "vtkPolyData.h"
#include "vtkPolyData.h"
#include "vtkFillHolesFilter.h"
#include <vtkSmartPointer.h>
#include <cassert>

vtkCxxRevisionMacro(vtkHolefill, "$Revision: 1.0 $");
vtkStandardNewMacro(vtkHolefill);

vtkHolefill::vtkHolefill()
{
  this->SetNumberOfInputPorts(1);
  this->SetNumberOfOutputPorts(1);
}

vtkHolefill::~vtkHolefill()
{
}
int vtkHolefill::FillInputPortInformation(int port, vtkInformation *info)
{
  info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkPolyData");
  return 1;
}

int vtkHolefill::FillOutputPortInformation(int port, vtkInformation *info)
{
  info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkPolyData");
  return 1;
}

int vtkHolefill::RequestData(vtkInformation *request, vtkInformationVector
**inputVector, vtkInformationVector *outputVector)
{
    assert(inputVector != NULL && outputVector != NULL);
vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation* outInfo = outputVector->GetInformationObject(0);
assert(inInfo != NULL && outInfo != NULL);

vtkPolyData* input = vtkPolyData::SafeDownCast(
                inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkPolyData* output = vtkPolyData::SafeDownCast(
                outInfo->Get(vtkDataObject::DATA_OBJECT()));
 if (input == NULL) {
vtkErrorMacro(<< "input == NULL");
return 0;
}
if (output == NULL) {
vtkErrorMacro(<< "output == NULL");
return 0;
}


vtkSmartPointer<vtkFillHolesFilter> fillHolesFilter =
vtkSmartPointer<vtkFillHolesFilter>::New();

fillHolesFilter->SetInput(input);
fillHolesFilter->SetHoleSize(1.0);
fillHolesFilter->Update();

output->ShallowCopy(input);

return 1;
}


void vtkHolefill::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}


Thank you.
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