itkOctreeNode.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkOctreeNode.h,v $
  Language:  C++
  Date:      $Date: 2006/10/30 18:33:06 $
  Version:   $Revision: 1.5 $

  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 */

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