Simple Gaussian Noise Generator

gaussian_noise_generator.h

template <typename _Scalar = double>
class GaussianNoiseGenerator
{
  using Clock = std::chrono::system_clock;
  using Scalar = _Scalar;

public:

  GaussianNoiseGenerator(const Scalar mean,
                         const Scalar std)
    : re_(Clock::now().time_since_epoch().count())
    , distr_(mean, std)
  {
    //
  }

  Scalar noise()
  {
    return distr_(re_);
  }

  Scalar operator()()
  {
    return noise();
  }

protected:

  std::default_random_engine re_;
  std::normal_distribution<Scalar> distr_;
};

/*

usage:

GaussianNoiseGenerator<> noise(0, 0.1);

double my_noisy_value = 5 + noise();

*/