BornAgain  1.18.0
Simulate and fit neutron and x-ray scattering at grazing incidence
Distribution2DGateSampler Class Reference
Inheritance diagram for Distribution2DGateSampler:
Collaboration diagram for Distribution2DGateSampler:

Public Member Functions

 Distribution2DGateSampler (double omega_x, double omega_y)
 
std::pair< double, double > randomSample () const final
 

Private Attributes

double m_omega_x
 
double m_omega_y
 

Detailed Description

Definition at line 55 of file IDistribution2DSampler.h.

Constructor & Destructor Documentation

◆ Distribution2DGateSampler()

Distribution2DGateSampler::Distribution2DGateSampler ( double  omega_x,
double  omega_y 
)
inline

Definition at line 58 of file IDistribution2DSampler.h.

59  : m_omega_x(omega_x), m_omega_y(omega_y)
60  {
61  }

Member Function Documentation

◆ randomSample()

std::pair< double, double > Distribution2DGateSampler::randomSample ( ) const
finalvirtual

Implements IDistribution2DSampler.

Definition at line 155 of file IDistribution2DSampler.cpp.

156 {
157  std::random_device rd; // random device class instance
158  std::mt19937 gen(rd()); // Standard mersenne_twister_engine seeded with rd()
159  std::uniform_real_distribution<double> uniformDist(0.0, 1.0);
160 
161  double cdf_value_phi = uniformDist(gen);
162 
163  // Use ITS and solve for phi from the cdf of radial (phi) distribution
164  double phi = std::sqrt(cdf_value_phi);
165  double alpha = 2 * M_PI * uniformDist(gen);
166  return std::make_pair(m_omega_x * phi * std::cos(alpha), m_omega_y * phi * std::sin(alpha));
167 }
#define M_PI
Definition: MathConstants.h:39

References m_omega_x, m_omega_y, and M_PI.

Member Data Documentation

◆ m_omega_x

double Distribution2DGateSampler::m_omega_x
private

Definition at line 65 of file IDistribution2DSampler.h.

Referenced by randomSample().

◆ m_omega_y

double Distribution2DGateSampler::m_omega_y
private

Definition at line 65 of file IDistribution2DSampler.h.

Referenced by randomSample().


The documentation for this class was generated from the following files: