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Add uniform_distribution function for clarity

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This commit is contained in:
Paul Romano 2021-04-26 10:25:09 -05:00
parent f0aaac4601
commit 1e1bfb40f1
8 changed files with 34 additions and 13 deletions
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9
src/physics.cpp
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@ -13,6 +13,7 @@
#include "openmc/nuclide.h"
#include "openmc/photon.h"
#include "openmc/physics_common.h"
#include "openmc/random_dist.h"
#include "openmc/random_lcg.h"
#include "openmc/reaction.h"
#include "openmc/secondary_uncorrelated.h"
@ -294,7 +295,7 @@ void sample_photon_reaction(Particle& p)
}
// Create Compton electron
double phi = 2.0*PI*prn(p.current_seed());
double phi = uniform_distribution(0., 2.0*PI, p.current_seed());
double E_electron = (alpha - alpha_out)*MASS_ELECTRON_EV - e_b;
int electron = static_cast<int>(Particle::Type::electron);
if (E_electron >= settings::energy_cutoff[electron]) {
@ -355,7 +356,7 @@ void sample_photon_reaction(Particle& p)
}
}
double phi = 2.0*PI*prn(p.current_seed());
double phi = uniform_distribution(0., 2.0*PI, p.current_seed());
Direction u;
u.x = mu;
u.y = std::sqrt(1.0 - mu*mu)*std::cos(phi);
@ -748,7 +749,7 @@ void elastic_scatter(int i_nuclide, const Reaction& rx, double kT,
if (!d_->angle().empty()) {
mu_cm = d_->angle().sample(p.E_, p.current_seed());
} else {
mu_cm = 2.0*prn(p.current_seed()) - 1.0;
mu_cm = uniform_distribution(-1., 1., p.current_seed());
}
// Determine direction cosines in CM
@ -977,7 +978,7 @@ sample_cxs_target_velocity(double awr, double E, Direction u, double kT, uint64_
double beta_vt = std::sqrt(beta_vt_sq);
// Sample cosine of angle between neutron and target velocity
mu = 2.0*prn(seed) - 1.0;
mu = uniform_distribution(-1., 1., seed);
// Determine rejection probability
double accept_prob = std::sqrt(beta_vn*beta_vn + beta_vt_sq -