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33 lines
630 B
C++
33 lines
630 B
C++
#ifndef GRID_LEXICOGRAPHIC_H
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#define GRID_LEXICOGRAPHIC_H
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namespace Grid{
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class Lexicographic {
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public:
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static inline void CoorFromIndex (std::vector<int>& coor,int index,std::vector<int> &dims){
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int nd= dims.size();
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coor.resize(nd);
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for(int d=0;d<nd;d++){
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coor[d] = index % dims[d];
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index = index / dims[d];
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}
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}
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static inline void IndexFromCoor (std::vector<int>& coor,int &index,std::vector<int> &dims){
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int nd=dims.size();
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int stride=1;
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index=0;
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for(int d=0;d<nd;d++){
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index = index+stride*coor[d];
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stride=stride*dims[d];
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}
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}
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};
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}
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#endif
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