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itkSparseFieldLayer.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkSparseFieldLayer.h,v $
00005   Language:  C++
00006   Date:      $Date: 2004-12-21 22:47:31 $
00007   Version:   $Revision: 1.7 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkSparseFieldLayer_h
00018 #define __itkSparseFieldLayer_h
00019 
00020 #include "itkObjectFactory.h"
00021 #include "itkObject.h"
00022 #include <vector>
00023 
00024 namespace itk {
00025 
00031 template <class TNodeType>
00032 class ConstSparseFieldLayerIterator
00033 {
00034  public:
00035   const TNodeType& operator*() const
00036   { return *m_Pointer; }
00037 
00038   const TNodeType* operator->() const
00039   { return m_Pointer; }
00040 
00041   const TNodeType* GetPointer() const
00042   { return m_Pointer; }
00043   
00044   bool operator==(const ConstSparseFieldLayerIterator o) const
00045   {
00046     if (m_Pointer == o.m_Pointer) return true;
00047     else return false;
00048   }
00049 
00050   bool operator!=(const ConstSparseFieldLayerIterator o) const
00051   {
00052     if (m_Pointer != o.m_Pointer) return true;
00053     else return false;
00054   }
00055 
00056   ConstSparseFieldLayerIterator &operator++()
00057   {
00058     m_Pointer = m_Pointer->Next;
00059     return *this;
00060   }
00061 
00062   ConstSparseFieldLayerIterator &operator--()
00063   {
00064     m_Pointer = m_Pointer->Previous;
00065     return *this;
00066   }
00067 
00068   ConstSparseFieldLayerIterator()
00069   { m_Pointer=0; }
00070 
00071   ConstSparseFieldLayerIterator(TNodeType *p)
00072   { m_Pointer=p; }
00073 
00074   ~ConstSparseFieldLayerIterator() {}
00075 
00076 protected:
00077   TNodeType *m_Pointer;
00078 };
00079 
00083 template <class TNodeType>
00084 class SparseFieldLayerIterator
00085   : public ConstSparseFieldLayerIterator<TNodeType>
00086 {
00087 public:
00088   typedef ConstSparseFieldLayerIterator<TNodeType> Superclass;
00089 
00090   SparseFieldLayerIterator() : Superclass()
00091   { }
00092 
00093   SparseFieldLayerIterator(TNodeType *p) : Superclass(p)
00094   { }
00095 
00096   TNodeType &operator*()
00097   { return *this->m_Pointer; }
00098 
00099   TNodeType* operator->()
00100   { return this->m_Pointer; }
00101 
00102   TNodeType* GetPointer()
00103   { return this->m_Pointer; }
00104   
00105   SparseFieldLayerIterator &operator++()
00106   {
00107     this->m_Pointer = this->m_Pointer->Next;
00108     return *this;
00109   }
00110 
00111   SparseFieldLayerIterator &operator--()
00112   {
00113     this->m_Pointer = this->m_Pointer->Previous;
00114     return *this;
00115   }
00116 
00117   SparseFieldLayerIterator &operator=(Superclass &sc)
00118   {
00119     this->m_Pointer = const_cast<TNodeType*> (sc.GetPointer());
00120     return *this;
00121   }
00122 };
00123 
00124 
00145 template <class TNodeType>
00146 class ITK_EXPORT SparseFieldLayer
00147     : public Object
00148 {
00149 public:
00151   typedef SparseFieldLayer Self;
00152   typedef Object  Superclass;
00153   typedef SmartPointer<Self>  Pointer;
00154   typedef SmartPointer<const Self>  ConstPointer;
00155 
00157   itkNewMacro(Self);
00158 
00160   itkTypeMacro(SparseFieldLayer, Object);
00161 
00163   typedef TNodeType NodeType;
00164 
00167   typedef NodeType ValueType;
00168 
00170   typedef SparseFieldLayerIterator<NodeType> Iterator;
00171 
00173   typedef ConstSparseFieldLayerIterator<NodeType> ConstIterator;
00174 
00176   struct RegionType 
00177   {
00178     ConstIterator first;
00179     ConstIterator last;  // this is one past the actual last element
00180   };   
00181 
00182   typedef std::vector<RegionType> RegionListType;
00183 
00185   NodeType *Front()
00186   { return m_HeadNode->Next; }
00187 
00189   const NodeType *Front() const
00190   { return m_HeadNode->Next; }
00191 
00193   void PopFront()
00194   {
00195     m_HeadNode->Next = m_HeadNode->Next->Next;
00196     m_HeadNode->Next->Previous = m_HeadNode;
00197     m_Size -= 1;
00198   }
00199 
00201   void PushFront(NodeType *n)
00202   {
00203     n->Next = m_HeadNode->Next;
00204     n->Previous = m_HeadNode;
00205     m_HeadNode->Next->Previous = n;
00206     m_HeadNode->Next = n;
00207     m_Size += 1;
00208   }
00209 
00211   void Unlink(NodeType *n)
00212   {
00213     n->Previous->Next = n->Next;
00214     n->Next->Previous = n->Previous;
00215     m_Size -= 1;
00216   }
00217 
00219   Iterator Begin()
00220   { return Iterator(m_HeadNode->Next); }
00221 
00223   ConstIterator Begin() const
00224   { return ConstIterator(m_HeadNode->Next); }
00225 
00227   Iterator End()
00228   { return Iterator(m_HeadNode); }
00229 
00231   ConstIterator End() const
00232   { return ConstIterator(m_HeadNode); }
00233 
00236   bool Empty() const
00237   {
00238     if (m_HeadNode->Next == m_HeadNode) return true;
00239     else return false;
00240   }
00242 
00245   unsigned int Size() const;
00246 
00249   RegionListType SplitRegions(int num) const;
00250 
00253   //  void Splice (SparseFieldLayer &);
00254 
00255 protected:
00256   SparseFieldLayer();
00257   ~SparseFieldLayer();
00258   virtual void PrintSelf(std::ostream& os, Indent indent) const;
00259   
00260 private:
00261   SparseFieldLayer(const Self&);    //purposely not implemented
00262   void operator=(const Self&);      //purposely not implemented
00263   
00266   NodeType *m_HeadNode;
00267   unsigned int m_Size;
00268 };
00269 
00270 
00271 } // end namespace itk
00272 
00273 #ifndef ITK_MANUAL_INSTANTIATION
00274 #include "itkSparseFieldLayer.txx"
00275 #endif
00276 
00277 #endif
00278 

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