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Reverse dim ordering lexico support

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paboyle 2017-10-30 00:03:15 +00:00
parent 84b441800f
commit 689323f4ee
1 changed files with 19 additions and 0 deletions
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19
lib/util/Lexicographic.h
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@ -26,6 +26,25 @@ namespace Grid{
} }
} }
static inline void IndexFromCoorReversed (const std::vector<int>& coor,int &index,const std::vector<int> &dims){
int nd=dims.size();
int stride=1;
index=0;
for(int d=nd-1;d>=0;d--){
index = index+stride*coor[d];
stride=stride*dims[d];
}
}
static inline void CoorFromIndexReversed (std::vector<int>& coor,int index,const std::vector<int> &dims){
int nd= dims.size();
coor.resize(nd);
for(int d=nd-1;d>=0;d--){
coor[d] = index % dims[d];
index = index / dims[d];
}
}
}; };
} }