BornAgain  1.19.0
Simulate and fit neutron and x-ray scattering at grazing incidence
Distribution2DGateSampler Class Reference
Inheritance diagram for Distribution2DGateSampler:
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Collaboration diagram for Distribution2DGateSampler:
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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 57 of file IDistribution2DSampler.h.

Constructor & Destructor Documentation

◆ Distribution2DGateSampler()

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

Definition at line 59 of file IDistribution2DSampler.h.

60  : m_omega_x(omega_x), m_omega_y(omega_y)
61  {
62  }

Member Function Documentation

◆ randomSample()

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

Implements IDistribution2DSampler.

Definition at line 154 of file IDistribution2DSampler.cpp.

155 {
156  std::random_device rd; // random device class instance
157  std::mt19937 gen(rd()); // Standard mersenne_twister_engine seeded with rd()
158  std::uniform_real_distribution<double> uniformDist(0.0, 1.0);
159 
160  double cdf_value_phi = uniformDist(gen);
161 
162  // Use ITS and solve for phi from the cdf of radial (phi) distribution
163  double phi = std::sqrt(cdf_value_phi);
164  double alpha = 2 * M_PI * uniformDist(gen);
165  return std::make_pair(m_omega_x * phi * std::cos(alpha), m_omega_y * phi * std::sin(alpha));
166 }
#define M_PI
Definition: Constants.h:44

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 66 of file IDistribution2DSampler.h.

Referenced by randomSample().

◆ m_omega_y

double Distribution2DGateSampler::m_omega_y
private

Definition at line 66 of file IDistribution2DSampler.h.

Referenced by randomSample().


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