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create common PRNG object in DiscreteConditional

release/4.3a0
Varun Agrawal 2025-05-15 17:12:13 -04:00
parent 7c53ca3491
commit 6527437c67
1 changed files with 4 additions and 3 deletions
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7
gtsam/discrete/DiscreteConditional.cpp
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@ -32,6 +32,9 @@
#include <utility>
#include <vector>
// In wrappers we can access std::mt19937_64 via gtsam.MT19937
static std::mt19937_64 kRandomNumberGenerator(2);
using namespace std;
using std::pair;
using std::stringstream;
@ -287,8 +290,6 @@ void DiscreteConditional::sampleInPlace(DiscreteValues* values) const {
/* ************************************************************************** */
size_t DiscreteConditional::sample(const DiscreteValues& parentsValues) const {
static mt19937 rng(2); // random number generator
// Get the correct conditional distribution
ADT pFS = choose(parentsValues, true); // P(F|S=parentsValues)
@ -310,7 +311,7 @@ size_t DiscreteConditional::sample(const DiscreteValues& parentsValues) const {
}
}
std::discrete_distribution<size_t> distribution(p.begin(), p.end());
return distribution(rng);
return distribution(kRandomNumberGenerator);
}
/* ************************************************************************** */