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refactored random subsystem

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added compile-time seed support
This commit is contained in:
FrankE
2016-04-26 15:15:28 +02:00
parent 8f6bfa917f
commit 62d8d6b36b
17 changed files with 163 additions and 29 deletions
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6
math/distribution/Exponential.h
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@@ -3,7 +3,7 @@
#include <cmath>
#include <random>
#include "../Random.h"
namespace Distribution {
@@ -14,13 +14,13 @@ namespace Distribution {
const T lambda;
std::minstd_rand gen;
RandomGenerator gen;
std::exponential_distribution<T> dist;
public:
/** ctor */
Exponential(const T lambda) : lambda(lambda), dist(lambda) {
Exponential(const T lambda) : lambda(lambda), gen(RANDOM_SEED), dist(lambda) {
;
}

5
math/distribution/Normal.h
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@@ -3,6 +3,7 @@
#include <cmath>
#include <random>
#include "../Random.h"
namespace Distribution {
@@ -15,14 +16,14 @@ namespace Distribution {
const T sigma;
const T _a;
std::minstd_rand gen;
RandomGenerator gen;
std::normal_distribution<T> dist;
public:
/** ctor */
Normal(const T mu, const T sigma) :
mu(mu), sigma(sigma), _a(1.0 / (sigma * std::sqrt(2.0 * M_PI))), gen(1234), dist(mu,sigma) {
mu(mu), sigma(sigma), _a(1.0 / (sigma * std::sqrt(2.0 * M_PI))), gen(RANDOM_SEED), dist(mu,sigma) {
}

14
math/distribution/Uniform.h
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@@ -3,6 +3,9 @@
#include <cmath>
#include <random>
#include "../Random.h"
#include <type_traits>
namespace Distribution {
@@ -11,14 +14,17 @@ namespace Distribution {
private:
std::minstd_rand gen;
std::uniform_real_distribution<T> dist;
RandomGenerator gen;
/** depending on T, Dist is either a uniform_real or uniform_int distribution */
typedef typename std::conditional< std::is_floating_point<T>::value, std::uniform_real_distribution<T>, std::uniform_int_distribution<T> >::type Dist;
Dist dist;
public:
/** ctor */
Uniform(const T min, const T max) :
gen(1234), dist(min, max) {
Uniform(const T min, const T max) : gen(RANDOM_SEED), dist(min, max) {
}
/** get a uniformaly distributed random number */