Athena_test::normal_distribution< T > Class Template Reference

#include <random.h>

Collaboration diagram for Athena_test::normal_distribution< T >:

Public Member Functions
	normal_distribution (T mu, T s)
T	operator() (URNG &rng) const

Private Attributes
T	m_mu
T	m_s

Detailed Description

template<class T>
class Athena_test::normal_distribution< T >

Definition at line 101 of file random.h.

Constructor & Destructor Documentation

normal_distribution()

template<class T>

Athena_test::normal_distribution< T >::normal_distribution ( T mu, T s )

inline

Definition at line 104 of file random.h.

: m_mu(mu), m_s(s) {}

Member Function Documentation

operator()()

template<class T>

T Athena_test::normal_distribution< T >::operator()

(

URNG &

rng

)

const

Definition at line 114 of file random.h.

{
  // Stamdard Box-Muller transform a la Numerical Recipes, except that for simplicity
  // i don't try to remember the second generated number between calls.  I don't
  // really care about performance here.
  T v1, v2, r2;
  do {
    v1 = 2*(static_cast<T>(rng()) / URNG::max())-1;
    v2 = 2*(static_cast<T>(rng()) / URNG::max())-1;
    r2 = v1*v1 + v2*v2;
  } while (r2 >= 1);
 
  T fac = sqrt(-2*log(r2) / r2);
  return v1*fac*m_s + m_mu;
}

Member Data Documentation

m_mu

template<class T>

T Athena_test::normal_distribution< T >::m_mu

private

Definition at line 108 of file random.h.

m_s

template<class T>

T Athena_test::normal_distribution< T >::m_s

private

Definition at line 109 of file random.h.

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

• random.h