//=========================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt 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.
//=========================================================================

// .NAME vtkExtractRegionEdges - filter removes polylines below threshold length
// .SECTION Description
// The filter removes polyline below threshold length.  Before analysis,
// duplicate points are merged, and then any input lines are stripped.  Then,
// before discarding any polylines, the polylines are appended to adjacent
// polylines where possible.

#ifndef __smtk_vtk_vtkExtractRegionEdges_h
#define __smtk_vtk_vtkExtractRegionEdges_h

#include "smtk/extension/vtk/reader/Exports.h" // For export macro
#include "vtkPolyDataAlgorithm.h"

class VTKSMTKREADEREXT_EXPORT vtkExtractRegionEdges : public vtkPolyDataAlgorithm
{
public:
  static vtkExtractRegionEdges* New();
  vtkTypeMacro(vtkExtractRegionEdges, vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  vtkSetStringMacro(RegionArrayName);
  vtkGetStringMacro(RegionArrayName);

  vtkGetMacro(RegionIdentifiersModified, bool);

protected:
  vtkExtractRegionEdges();
  ~vtkExtractRegionEdges();

  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*);
  virtual int FillInputPortInformation(int port, vtkInformation* info);

  void ConvertInputToPolyData(vtkPointSet* input, vtkPolyData* polyData);
  void ExtractRegionEdgeSegments(
    vtkPolyData* polyData, vtkCellArray* lines, vtkPolyData* linePolyData);
  void BuildRegionLoops(vtkPolyData* polyData);

  void UpdateRegionIdentifiersIfNecessary(vtkPolyData* outputPD);
  void SetupOutputFieldData(vtkPolyData* output);

private:
  vtkExtractRegionEdges(const vtkExtractRegionEdges&); // Not implemented.
  void operator=(const vtkExtractRegionEdges&);        // Not implemented.

  char* RegionArrayName;
  bool RegionIdentifiersModified;

  class vtkInternal;
  vtkInternal* Internal;
};

#endif
