private:
static const std::vector<v3s16> &generateFacePosition(u16 d);
static std::unordered_map<u16, std::vector<v3s16>> cache;
private:
static const std::vector<v3s16> &generateFacePosition(u16 d);
static std::unordered_map<u16, std::vector<v3s16>> cache;