Rand.h

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#pragma once
 
#include <random>
#include <algorithm>

class Random {
public:
  Random();

  Random(uint32_t seed);

  float rand005();

  float rand051();

  float rand01();

  float rand11();

  float rand0Pi();

  template <typename T> T rand(T a, T b) {
    return a+T(rand01()*(b-a));
  }

  template <typename T> void shuffle(std::vector<T>& a) {
    for (size_t i=0;i<a.size();++i) {
      size_t r = Random::rand<size_t>(0,i+1);
      std::swap(a[i], a[r]);
    }
  }
 
private:
  std::random_device rd;
  std::mt19937 gen;
  std::uniform_real_distribution<float> dis01;
  std::uniform_real_distribution<float> dis11;
  std::uniform_real_distribution<float> disPi;
  std::uniform_real_distribution<float> dis005;
  std::uniform_real_distribution<float> dis051;
 
};

extern Random staticRand;