37 lines
930 B
C++
37 lines
930 B
C++
#include "RandomGenerator.h"
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#include <chrono>
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#include <random>
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static RandomGenerator _RandomGeneratorDefault;
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RandomGenerator &paysages::system::RandomGeneratorDefault = _RandomGeneratorDefault;
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class RandomGenerator::RandomGeneratorPrivate {
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public:
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RandomGeneratorPrivate(unsigned int seed) : generator(seed) {
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}
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default_random_engine generator;
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uniform_real_distribution<double> distribution_double;
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};
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RandomGenerator::RandomGenerator(RandomGenerator::Seed seed) {
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if (not seed) {
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random_device true_random;
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if (true_random.entropy()) {
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seed = true_random();
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} else {
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seed = chrono::system_clock::now().time_since_epoch().count();
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}
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}
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data = new RandomGeneratorPrivate(seed);
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}
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RandomGenerator::~RandomGenerator() {
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delete data;
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}
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double RandomGenerator::genDouble() {
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return data->distribution_double(data->generator);
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}
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