tools::rpoiss< FLAT, REAL, UINT > Class Template Reference

Public Member Functions
	rpoiss (FLAT &a_flat, REAL a_mean=1)
virtual	~rpoiss ()
	rpoiss (const rpoiss &a_from)
rpoiss &	operator= (const rpoiss &a_from)
UINT	shoot (const REAL &a_two_pi, REAL(*a_sqrt)(REAL), REAL(*a_log)(REAL), REAL(*a_exp)(REAL), REAL(*a_cos)(REAL)) const
FLAT &	flat ()
void	set_seed (unsigned int a_seed)

Protected Attributes
FLAT &	m_flat
REAL	m_mean

Detailed Description

template<class FLAT, class REAL, class UINT>
class tools::rpoiss< FLAT, REAL, UINT >

Definition at line 154 of file randT.

Constructor & Destructor Documentation

rpoiss() [1/2]

template<class FLAT , class REAL , class UINT >

tools::rpoiss< FLAT, REAL, UINT >::rpoiss ( FLAT &  a_flat, REAL  a_mean = 1  )

inline

Definition at line 156 of file randT.

:m_flat(a_flat),m_mean(a_mean){}

~rpoiss()

template<class FLAT , class REAL , class UINT >

virtual tools::rpoiss< FLAT, REAL, UINT >::~rpoiss ( )

inlinevirtual

Definition at line 157 of file randT.

{}

rpoiss() [2/2]

template<class FLAT , class REAL , class UINT >

tools::rpoiss< FLAT, REAL, UINT >::rpoiss ( const rpoiss< FLAT, REAL, UINT > &  a_from )

inline

Definition at line 159 of file randT.

:m_flat(a_from.m_flat),m_mean(a_from.m_mean){}

Member Function Documentation

flat()

template<class FLAT , class REAL , class UINT >

FLAT& tools::rpoiss< FLAT, REAL, UINT >::flat ( )

inline

Definition at line 188 of file randT.

{return m_flat;}

operator=()

template<class FLAT , class REAL , class UINT >

rpoiss& tools::rpoiss< FLAT, REAL, UINT >::operator= ( const rpoiss< FLAT, REAL, UINT > &  a_from )

inline

Definition at line 160 of file randT.

                                          {
    m_mean = a_from.m_mean;
    return *this;
  }

set_seed()

template<class FLAT , class REAL , class UINT >

void tools::rpoiss< FLAT, REAL, UINT >::set_seed ( unsigned int  a_seed )

inline

Definition at line 189 of file randT.

{m_flat.set_seed(a_seed);}

shoot()

template<class FLAT , class REAL , class UINT >

UINT tools::rpoiss< FLAT, REAL, UINT >::shoot ( const REAL &  a_two_pi, REAL(*)(REAL)  a_sqrt, REAL(*)(REAL)  a_log, REAL(*)(REAL)  a_exp, REAL(*)(REAL)  a_cos  ) const

inline

Definition at line 165 of file randT.

                                                                                                                      {
    UINT number = 0;
    if(m_mean <= 16) {
      REAL position = m_flat.shoot();
      REAL poissonValue = a_exp(-m_mean);
      REAL poissonSum = poissonValue;
      while(poissonSum <= position) {
        number++;
        poissonValue *= m_mean/REAL(number);
        poissonSum += poissonValue;
      }
      return number;
    }
    // m_mean > 16 :
    REAL t = a_sqrt(-REAL(2)*a_log(m_flat.shoot()));
    REAL y = a_two_pi*m_flat.shoot();
    t *= a_cos(y);
    REAL value = m_mean + t*a_sqrt(m_mean) + REAL(0.5);
    if(value <= REAL(0)) return UINT(0);
    static const REAL limit = REAL(2e9);
    if(value >= limit) return UINT(limit);
    return UINT(value);
  }

Member Data Documentation

m_flat

template<class FLAT , class REAL , class UINT >

FLAT& tools::rpoiss< FLAT, REAL, UINT >::m_flat

protected

Definition at line 191 of file randT.

m_mean

template<class FLAT , class REAL , class UINT >

REAL tools::rpoiss< FLAT, REAL, UINT >::m_mean

protected

Definition at line 192 of file randT.

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

• /Users/barrand/private/dev/softinex/g4tools/g4tools/tools/randT