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

  Program:   Visualization Toolkit
  Module:    vtkHyperOctreePointsGrabber.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 vtkHyperOctreePointsGrabber - An object used by filters to
// store points computed on face or edge of an hyperoctant. It is an
// abstract class. vtkClipHyperOctree and vtkHyperOctreeCutter use
// vtkHyperOctreeClipCutPointsGrabber
// vtkHyperOctreeContourFilter use an internal one:
// vtkHyperOctreeContourFilterPointsGrabber.

// .SECTION See Also
// vtkHyperOctree, vtkHyperOctreeClipCutPointsGrabber,
// vtkClipHyperOctree, vtkHyperOctreeCutter

#ifndef __vtkHyperOctreePointsGrabber_h
#define __vtkHyperOctreePointsGrabber_h

#include "vtkObject.h"

class VTK_FILTERING_EXPORT vtkHyperOctreePointsGrabber : public vtkObject
{
public:
  vtkTypeMacro(vtkHyperOctreePointsGrabber,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);
  
  // Description:
  // Return the dimension of the hyperoctree.
  // \post valid_result: (result==2 || result==3)
  int GetDimension();
  
  // Description:
  // Set the dimension of the hyperoctree.
  // \pre valid_dim: (dim==2 || dim==3)
  // \post is_set: GetDimension()==dim
  virtual void SetDimension(int dim)=0;
  
  // Description:
  // Initialize the points insertion scheme.
  // Actually, it is just a trick to initialize the IdSet from the filter.
  // The IdSet class cannot be shared with the filter because it is a Pimpl.
  // It is used by clip,cut and contour filters to build the points
  // that lie on an hyperoctant.
  // \pre only_in_3d: GetDimension()==3
  virtual void InitPointInsertion()=0;
  
  
  // Description:
  // Insert a point, assuming the point is unique and does not require a
  // locator. Tt does not mean it does not use a locator. It just mean that
  // some implementation may skip the use of a locator.
  virtual void InsertPoint(vtkIdType ptId,
                           double pt[3],
                           double pcoords[3],
                           int ijk[3])=0;
  
  // Description:
  // Insert a point using a locator.
  virtual void InsertPointWithMerge(vtkIdType ptId,
                                    double pt[3],
                                    double pcoords[3],
                                    int ijk[3])=0;
  
  // Description:
  // Insert a point in the quadtree case.
  virtual void InsertPoint2D(double pt[3],
                             int ijk[3])=0;
  
protected:
  // Constructor with default bounds (0,1, 0,1, 0,1).
  vtkHyperOctreePointsGrabber();
  virtual ~vtkHyperOctreePointsGrabber();
  
  int Dimension;
  
private:
  vtkHyperOctreePointsGrabber(const vtkHyperOctreePointsGrabber&);  // Not implemented.
  void operator=(const vtkHyperOctreePointsGrabber&);    // Not implemented.
};

#endif