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Had to break this out for universal access through the code base.

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This commit is contained in:
Peter Boyle 2016-02-11 07:40:09 -06:00
parent 7f927a541c
commit 9548c8b91f
1 changed files with 32 additions and 0 deletions
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lib/Lexicographic.h Normal file
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#ifndef GRID_LEXICOGRAPHIC_H
#define GRID_LEXICOGRAPHIC_H
namespace Grid{
class Lexicographic {
public:
static inline void CoorFromIndex (std::vector<int>& coor,int index,std::vector<int> &dims){
int nd= dims.size();
coor.resize(nd);
for(int d=0;d<nd;d++){
coor[d] = index % dims[d];
index = index / dims[d];
}
}
static inline void IndexFromCoor (std::vector<int>& coor,int &index,std::vector<int> &dims){
int nd=dims.size();
int stride=1;
index=0;
for(int d=0;d<nd;d++){
index = index+stride*coor[d];
stride=stride*dims[d];
}
}
};
}
#endif