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

  Program:   Visualization Toolkit
  Module:    vtkExtractEdges.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


Copyright (c) 1993-2000 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

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modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
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=========================================================================*/
// .NAME vtkExtractEdges - extract cell edges from any type of data
// .SECTION Description
// vtkExtractEdges is a filter to extract edges from a dataset. Edges
// are extracted as lines or polylines.

// .SECTION See Also
// vtkFeatureEdges

#ifndef __vtkExtractEdges_h
#define __vtkExtractEdges_h

#include "vtkDataSetToPolyDataFilter.h"

class VTK_EXPORT vtkExtractEdges : public vtkDataSetToPolyDataFilter
{
public:
  static vtkExtractEdges *New();
  vtkTypeMacro(vtkExtractEdges,vtkDataSetToPolyDataFilter);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Set / get a spatial locator for merging points. By
  // default an instance of vtkMergePoints is used.
  void SetLocator(vtkPointLocator *locator);
  vtkGetObjectMacro(Locator,vtkPointLocator);

  // Description:
  // Create default locator. Used to create one when none is specified.
  void CreateDefaultLocator();

  // Description:
  // Return MTime also considering the locator.
  unsigned long GetMTime();

  // Description:
  // For legacy compatibility. Do not use.
  void SetLocator(vtkPointLocator& locator) {this->SetLocator(&locator);};

protected:
  vtkExtractEdges();
  ~vtkExtractEdges();
  vtkExtractEdges(const vtkExtractEdges&) {};
  void operator=(const vtkExtractEdges&) {};

  // Usual data generation method
  void Execute();

  vtkPointLocator *Locator;
};

#endif


