itkOctreeNode.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkOctreeNode.h,v $
  Language:  C++
  Date:      $Date: 2009-02-06 20:53:15 $
  Version:   $Revision: 1.6 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/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 notices for more information.

=========================================================================*/
#ifndef __itkOctreeNode_h
#define __itkOctreeNode_h
#include "itkMacro.h"
namespace itk {

enum LeafIdentifier { ZERO=0,ONE=1,TWO=2,THREE=3,FOUR=4,FIVE=5,SIX=6,SEVEN=7 };


//A forward-declaration
class OctreeNodeBranch;
class OctreeBase;
  
class ITKCommon_EXPORT OctreeNode
{
public:

  OctreeNode(void);

  virtual ~OctreeNode(void);

  OctreeNode & GetChild(const enum LeafIdentifier ChildID) const;
  OctreeNode & GetChild(const enum LeafIdentifier ChildID);

  int GetColor(void) const;

  void SetColor( int NodeColor);

  void SetBranch(OctreeNodeBranch * NewBranch);

  bool IsNodeColored(void) const;
  inline void SetParentOctree(OctreeBase *parent)
    {
    m_Parent = parent;
    }
protected:
private:

  void RemoveChildren(void);

  OctreeNodeBranch * m_Branch; 
  OctreeBase       * m_Parent;
};

class OctreeNodeBranch
{
public:
  OctreeNodeBranch(OctreeBase *parent)
    {
    for(int i = 0; i < 8; i++)
      {
      m_Leaves[i].SetParentOctree(parent);
      }
    }
  inline OctreeNode *GetLeaf(enum LeafIdentifier LeafID)
    {
    return &m_Leaves[LeafID];
    }
private:
  OctreeNode m_Leaves[8];
};
} //End of itk Namespace
#endif                          /* __itkOctreeNode_h */