// -*- c++ -*-
/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: pqBlotDialog.h,v $

  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.

=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2009 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/

// .NAME vtkPVRecoverGeometryWireframe - Get corrected wireframe from tesselated facets
//
// .SECTION Description
//
// When vtkPVGeometryFilter tessellates nonlinear faces into linear
// approximations, it introduces edges in the middle of the facets of the
// original mesh (as any valid tessellation would).  To correct for this,
// vtkPVGeometryFilter also writes out some fields that allows use to identify
// the edges that are actually part of the original mesh.  This filter works in
// conjunction with vtkPVGeometryFilter by taking its output, adding an edge
// flag and making the appropriate adjustments so that rendering with line
// fill mode will make the correct wireframe.
//
// .SECTION See Also
// vtkPVGeometryFilter
//

#ifndef __vtkPVRecoverGeometryWireframe_h
#define __vtkPVRecoverGeometryWireframe_h

#include "vtkPolyDataAlgorithm.h"
#include "vtkPVVTKExtensionsRenderingModule.h" // needed for export macro

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

  // Description:
  // In order to determine which edges existed in the original data, we need an
  // identifier on each cell determining which face (not cell) it originally
  // came from.  The ids should be put in a cell data array with this name.  The
  // existance of this field is also a signal that this wireframe extraction is
  // necessary.
  static const char *ORIGINAL_FACE_IDS()
    { return "vtkPVRecoverWireframeOriginalFaceIds"; }

protected:
  vtkPVRecoverGeometryWireframe();
  ~vtkPVRecoverGeometryWireframe();

  virtual int RequestData(vtkInformation *request,
                          vtkInformationVector **inputVector,
                          vtkInformationVector *outputVector);

private:
  vtkPVRecoverGeometryWireframe(const vtkPVRecoverGeometryWireframe &); // Not implemented
  void operator=(const vtkPVRecoverGeometryWireframe &); // Not implemented
};

#endif //__vtkPVRecoverGeometryWireframe_h
