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#pragma once
namespace math
{
template<typename T>
class Randomizer final {
public:
explicit Randomizer(void);
explicit Randomizer(std::uint64_t seed);
virtual ~Randomizer(void) = default;
void add(const T& value);
const T& get(void);
void clear(void);
private:
std::vector<T> m_vector;
std::mt19937_64 m_twister;
std::uniform_int_distribution<std::size_t> m_dist;
};
} // namespace math
template<typename T>
inline math::Randomizer<T>::Randomizer(void)
{
m_vector.clear();
m_twister.seed(std::random_device()());
m_dist = std::uniform_int_distribution<std::size_t>(0, 0);
}
template<typename T>
inline math::Randomizer<T>::Randomizer(std::uint64_t seed)
{
m_vector.clear();
m_twister.seed(seed);
m_dist = std::uniform_int_distribution<std::size_t>(0, 0);
}
template<typename T>
inline void math::Randomizer<T>::add(const T& value)
{
m_vector.push_back(value);
m_dist = std::uniform_int_distribution<std::size_t>(0, m_vector.size() - 1);
}
template<typename T>
inline const T& math::Randomizer<T>::get(void)
{
return m_vector.at(m_dist(m_twister));
}
template<typename T>
inline void math::Randomizer<T>::clear(void)
{
m_vector.clear();
m_dist = std::uniform_int_distribution<std::size_t>(0, 0);
}
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