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itkIndex.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkIndex.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-10-27 16:06:22 $
00007   Version:   $Revision: 1.66 $
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 __itkIndex_h
00018 #define __itkIndex_h
00019 
00020 #include "itkMacro.h"
00021 #include "itkOffset.h"
00022 #include "itkSize.h"
00023 #include "itkFixedArray.h"
00024 #include "itkMath.h"
00025 
00026 #include <memory>
00027 
00028 #include "itkExceptionObject.h"
00029 
00030 namespace itk
00031 {
00032 
00033 namespace Functor
00034 {
00035 template<unsigned int VIndexDimension> class IndexLexicographicCompare;
00036 }
00037 
00067 template<unsigned int VIndexDimension=2>
00068 class Index {
00069 public:
00071   typedef Index  Self;
00072 
00074   typedef   Index<VIndexDimension>  IndexType;
00075   typedef   long                    IndexValueType;
00076 
00078   static unsigned int GetIndexDimension() { return VIndexDimension; }
00079 
00081   typedef   Size<VIndexDimension>  SizeType;
00082 
00084   typedef   Offset<VIndexDimension>              OffsetType;
00085   typedef   typename OffsetType::OffsetValueType OffsetValueType;
00086 
00088   typedef Functor::IndexLexicographicCompare<VIndexDimension> LexicographicCompare;
00089 
00091   const Self
00092   operator+(const SizeType &size) const
00093     {
00094     Self result;
00095     for (unsigned int i=0; i < VIndexDimension; i++)
00096       { result[i] = m_Index[i] + static_cast<IndexValueType>(size[i]); }
00097     return result;
00098     }
00100 
00102   const Self &
00103   operator+=(const SizeType &size)
00104     {
00105     for (unsigned int i=0; i < VIndexDimension; i++)
00106       { m_Index[i] += static_cast<IndexValueType>(size[i]); }
00107     return *this;
00108     }
00110 
00112   const Self
00113   operator-(const SizeType &size) const
00114     {
00115     Self result;
00116     for (unsigned int i=0; i < VIndexDimension; i++)
00117       { result[i] = m_Index[i] - static_cast<IndexValueType>(size[i]); }
00118     return result;
00119     }
00121 
00123   const Self &
00124   operator-=(const SizeType &size)
00125     {
00126     for (unsigned int i=0; i < VIndexDimension; i++)
00127       { m_Index[i] -= static_cast<IndexValueType>(size[i]); }
00128     return *this;
00129     }
00131 
00133   const Self
00134   operator+(const OffsetType &offset) const
00135     {
00136     Self result;
00137     for (unsigned int i=0; i < VIndexDimension; i++)
00138       { result[i] = m_Index[i] + offset[i]; }
00139     return result;
00140     }
00142 
00144   const Self &
00145   operator+=(const OffsetType &offset)
00146     {
00147     for (unsigned int i=0; i < VIndexDimension; i++)
00148       { m_Index[i] += offset[i]; }
00149     return *this;
00150     }
00152 
00154   const Self &
00155   operator-=(const OffsetType &offset)
00156     {
00157     for (unsigned int i=0; i < VIndexDimension; i++)
00158       { m_Index[i] -= offset[i]; }
00159     return *this;
00160     }
00162 
00164   const Self
00165   operator-(const OffsetType &off) const
00166     {
00167     Self result;
00168     for (unsigned int i=0; i < VIndexDimension; i++)
00169       { result[i] = m_Index[i] - off.m_Offset[i]; }
00170     return result;
00171     }
00173 
00175   const OffsetType
00176   operator-(const Self &vec) const
00177     {
00178     OffsetType result;
00179     for (unsigned int i=0; i < VIndexDimension; i++)
00180       { result[i] = m_Index[i] - vec.m_Index[i]; }
00181     return result;
00182     }
00184 
00187   const Self
00188   operator*(const SizeType &vec) const
00189     {
00190     Self result;
00191     for (unsigned int i=0; i < VIndexDimension; i++)
00192       { result[i] = m_Index[i] * static_cast<IndexValueType>(vec.m_Size[i]); }
00193     return result;
00194     }
00196 
00198   bool
00199   operator==(const Self &vec) const
00200     {
00201     bool same=true;
00202     for (unsigned int i=0; i < VIndexDimension && same; i++)
00203       { same = (m_Index[i] == vec.m_Index[i]); }
00204     return same;
00205     }
00207 
00209   bool
00210   operator!=(const Self &vec) const
00211     {
00212     bool same=true;
00213     for (unsigned int i=0; i < VIndexDimension && same; i++)
00214       { same = (m_Index[i] == vec.m_Index[i]); }
00215     return !same;
00216     }
00218 
00221   IndexValueType & operator[](unsigned int dim)
00222     { return m_Index[dim]; }
00223 
00227   IndexValueType operator[](unsigned int dim) const
00228     { return m_Index[dim]; }
00229 
00232   const IndexValueType *GetIndex() const { return m_Index; };
00233 
00238   void SetIndex(const IndexValueType val[VIndexDimension])
00239     { memcpy(m_Index, val, sizeof(IndexValueType)*VIndexDimension); }
00240 
00247   void SetElement(unsigned long element, IndexValueType val )
00248     { m_Index[ element ] = val;  }
00249 
00256   IndexValueType GetElement( unsigned long element ) const
00257     { return m_Index[ element ]; }
00258 
00262   static Self GetBasisIndex(unsigned int dim); 
00263 
00266   void Fill(IndexValueType value)
00267     { for(unsigned int i=0;i < VIndexDimension; ++i) m_Index[i] = value; }
00268 
00274   IndexValueType m_Index[VIndexDimension];
00275 
00277   template <class TCoordRep>
00278   inline void CopyWithRound( const FixedArray<TCoordRep,VIndexDimension> & point )
00279     {
00280 #ifdef ITK_USE_TEMPLATE_META_PROGRAMMING_LOOP_UNROLLING
00281     itkForLoopRoundingAndAssignmentMacro(IndexType,ContinuousIndexType,IndexValueType,m_Index,point,VIndexDimension);
00282 #else
00283     for(unsigned int i=0;i < VIndexDimension; ++i)
00284       {
00285       m_Index[i] = Math::Round<IndexValueType>( point[i] );
00286       }
00287 #endif
00288     }
00290 
00292   template <class TCoordRep>
00293   inline void CopyWithCast( const FixedArray<TCoordRep,VIndexDimension> & point )
00294     {
00295     for(unsigned int i=0;i < VIndexDimension; ++i)
00296       {
00297       m_Index[i] = static_cast< IndexValueType>( point[i] );
00298       }
00299     }
00301 
00302 // force gccxml to find the constructors found before the internal upgrade to gcc 4.2
00303 #if defined(CABLE_CONFIGURATION)
00304   Index(); //purposely not implemented
00305   Index(const Self&); //purposely not implemented
00306   void operator=(const Self&); //purposely not implemented
00307 #endif
00308 
00309 };
00310 
00311 namespace Functor
00312 {
00320 template<unsigned int VIndexDimension>
00321 class IndexLexicographicCompare
00322 {
00323 public:
00324   bool operator()(Index<VIndexDimension> const& l,
00325                   Index<VIndexDimension> const& r) const
00326     {
00327     for(unsigned int i=0; i < VIndexDimension; ++i)
00328       {
00329       if(l.m_Index[i] < r.m_Index[i])
00330         {
00331         return true;
00332         }
00333       else if(l.m_Index[i] > r.m_Index[i])
00334         {
00335         return false;
00336         }
00337       }
00338     return false;
00339     }
00340 };
00341 }
00342 
00343 template<unsigned int VIndexDimension>
00344 Index<VIndexDimension> 
00345 Index<VIndexDimension>
00346 ::GetBasisIndex(unsigned int dim)
00347 {
00348   Self ind;
00349   
00350   memset(ind.m_Index, 0, sizeof(IndexValueType)*VIndexDimension);
00351   ind.m_Index[dim] = 1;
00352   return ind;
00353 }
00354 
00355 template<unsigned int VIndexDimension>
00356 std::ostream & operator<<(std::ostream &os, const Index<VIndexDimension> &ind)
00357 {
00358   os << "[";
00359   for (unsigned int i=0; i+1 < VIndexDimension; ++i)
00360     {
00361     os << ind[i] << ", ";
00362     }
00363   if (VIndexDimension >= 1)
00364     {
00365     os << ind[VIndexDimension-1];
00366     }
00367   os << "]";
00368   return os;
00369 }
00370 
00371 } // end namespace itk
00372 
00373 #endif 
00374 

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