eflowCellIntegrand< expType > Class Template Reference

Class to represent the 2D Gaussian integrand. More...

#include <eflowCellIntegrator.h>

Collaboration diagram for eflowCellIntegrand< expType >:

Public Member Functions
	eflowCellIntegrand (double sigma)
	~eflowCellIntegrand ()
void	setEtaSq (double xSq)
double	evaluateStdExp (double rSq) const
double	evaluateLookupExp (double rSq) const
double	evaluate (double y)
	The evaluate method for the integration. More...
double	evaluate (double phi)
double	evaluate (double phi)

Private Attributes
const eflowLookupExp *	m_lookupExp
double	m_oneOverTwoSigmaSq
double	m_norm
double	m_etaSq

Detailed Description

template<Exp_t expType>
class eflowCellIntegrand< expType >

Class to represent the 2D Gaussian integrand.

EtaSq is set via a set method, phi is a parameter to the evalutate() method. Hence the class is only the direct integrator of the inner (i.e. phi) integration, while the eflowCell Integrator acts as the integrand for the outer (i.e. eta) integration. To evaluate the integrand, either std::exp or eflowLookupExp is used, depending on the value of the template parameter. Templates are used instead of polymorphism here due to the better CPU performance.

Definition at line 120 of file eflowCellIntegrator.h.

Constructor & Destructor Documentation

eflowCellIntegrand()

template<Exp_t expType>

eflowCellIntegrand< expType >::eflowCellIntegrand ( double  sigma )

inline

Definition at line 122 of file eflowCellIntegrator.h.

                                  : m_lookupExp(eflowLookupExp::getInstance()),
  m_oneOverTwoSigmaSq(1 / (2 * sigma * sigma)), m_norm(m_oneOverTwoSigmaSq / M_PI), m_etaSq(NAN) { }

~eflowCellIntegrand()

template<Exp_t expType>

eflowCellIntegrand< expType >::~eflowCellIntegrand ( )

inline

Definition at line 124 of file eflowCellIntegrator.h.

{ }

Member Function Documentation

evaluate() [1/3]

double eflowCellIntegrand< stdExp >::evaluate ( double  phi )

inline

Definition at line 140 of file eflowCellIntegrator.h.

{ return evaluateStdExp(m_etaSq+phi*phi); }

evaluate() [2/3]

double eflowCellIntegrand< lookupExp >::evaluate ( double  phi )

inline

Definition at line 141 of file eflowCellIntegrator.h.

{ return evaluateLookupExp(m_etaSq+phi*phi); }

evaluate() [3/3]

template<Exp_t expType>

double eflowCellIntegrand< expType >::evaluate ( double  y )

inline

The evaluate method for the integration.

The implementation depends on the template parameter

evaluateLookupExp()

template<Exp_t expType>

double eflowCellIntegrand< expType >::evaluateLookupExp ( double  rSq ) const

inline

Definition at line 129 of file eflowCellIntegrator.h.

{ return m_lookupExp->evaluate(rSq * m_oneOverTwoSigmaSq)*m_norm; }

evaluateStdExp()

template<Exp_t expType>

double eflowCellIntegrand< expType >::evaluateStdExp ( double  rSq ) const

inline

Definition at line 128 of file eflowCellIntegrator.h.

{ return m_norm * exp(-rSq * m_oneOverTwoSigmaSq); }

setEtaSq()

template<Exp_t expType>

void eflowCellIntegrand< expType >::setEtaSq ( double  xSq )

inline

Definition at line 126 of file eflowCellIntegrator.h.

{ m_etaSq = xSq; }

Member Data Documentation

m_etaSq

template<Exp_t expType>

double eflowCellIntegrand< expType >::m_etaSq

private

Definition at line 138 of file eflowCellIntegrator.h.

m_lookupExp

template<Exp_t expType>

const eflowLookupExp* eflowCellIntegrand< expType >::m_lookupExp

private

Definition at line 135 of file eflowCellIntegrator.h.

m_norm

template<Exp_t expType>

double eflowCellIntegrand< expType >::m_norm

private

Definition at line 137 of file eflowCellIntegrator.h.

m_oneOverTwoSigmaSq

template<Exp_t expType>

double eflowCellIntegrand< expType >::m_oneOverTwoSigmaSq

private

Definition at line 136 of file eflowCellIntegrator.h.

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

• eflowCellIntegrator.h