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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkMergePoints.h

  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.

=========================================================================*/
// .NAME vtkMergePoints - merge exactly coincident points
// .SECTION Description
// vtkMergePoints is a locator object to quickly locate points in 3D.
// The primary difference between vtkMergePoints and its superclass
// vtkPointLocator is that vtkMergePoints merges precisely coincident points
// and is therefore much faster.
// .SECTION See Also
// vtkCleanPolyData

#ifndef __vtkMergePoints_h
#define __vtkMergePoints_h

#include "vtkPointLocator.h"

class VTK_FILTERING_EXPORT vtkMergePoints : public vtkPointLocator
{
public:
  static vtkMergePoints *New();
  vtkTypeMacro(vtkMergePoints,vtkPointLocator);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Determine whether point given by x[3] has been inserted into points list.
  // Return id of previously inserted point if this is true, otherwise return
  // -1.
  vtkIdType IsInsertedPoint(const double x[3]);
  vtkIdType IsInsertedPoint(double x, double  y, double z)
    {return this->vtkPointLocator::IsInsertedPoint(x, y, z); };

  // Description:
  // Determine whether point given by x[3] has been inserted into points list.
  // Return 0 if point was already in the list, otherwise return 1. If the
  // point was not in the list, it will be ADDED.  In either case, the id of
  // the point (newly inserted or not) is returned in the ptId argument.
  // Note this combines the functionality of IsInsertedPoint() followed
  // by a call to InsertNextPoint().
  int InsertUniquePoint(const double x[3], vtkIdType &ptId);
  
protected:
  vtkMergePoints() {};
  ~vtkMergePoints() {};
  
private:
  vtkMergePoints(const vtkMergePoints&);  // Not implemented.
  void operator=(const vtkMergePoints&);  // Not implemented.
};

#endif