hash_cell_nd()

uint64_t MayaFlux::Kinesis::detail::hash_cell_nd ( const Eigen::VectorXd &  p, float  inv_cell  )

inline

Definition at line 61 of file SpatialIndex.hpp.

    {
        uint64_t h = 0;
        constexpr uint64_t primes[] = {
            73856093ULL, 19349663ULL, 83492791ULL,
            48611ULL, 76963ULL, 15485863ULL,
            32452843ULL, 49979687ULL
        };
        Eigen::Index dims = std::min(p.size(), static_cast<Eigen::Index>(8));
        for (Eigen::Index i = 0; i < dims; ++i) {
            auto ci = static_cast<int32_t>(std::floor(p(i) * inv_cell));
            h ^= static_cast<uint64_t>(static_cast<uint32_t>(ci)) * primes[i];
        }
        return h;
    }

References h.

Referenced by MayaFlux::Kinesis::SpatialIndex< PointT >::hash_cell(), and MayaFlux::Kinesis::SpatialIndex< PointT >::query_grid().

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