smash::DensityParameters Class Reference

#include <density.h>

A class to pre-calculate and store parameters relevant for density calculation.

It has to be initialized only once per SMASH run.

Definition at line 106 of file density.h.

Collaboration diagram for smash::DensityParameters:

Public Member Functions
	DensityParameters (const ExperimentParameters &par)
	Constructor of DensityParameters. More...
int	ntest () const
double	r_cut () const
double	r_cut_sqr () const
double	two_sig_sqr_inv () const
double	norm_factor_sf () const

Private Attributes
const double	sig_
	Gaussian smearing width [fm]. More...
const double	r_cut_
	Cut-off radius [fm]. More...
double	r_cut_sqr_
	Squared cut-off radius [fm \(^2\)]. More...
double	two_sig_sqr_inv_
	\( (2 \sigma^2)^{-1} \) [fm \(^{-2}\)] More...
double	norm_factor_sf_
	Normalization for smearing factor. More...
const int	ntest_
	Testparticle number. More...

Constructor & Destructor Documentation

smash::DensityParameters::DensityParameters ( const ExperimentParameters &  par )

inline

Constructor of DensityParameters.

Parameters

[in]

par

Struct containing the Gaussian smearing width \(\sigma\), the cutoff factor \(a\) where the cutoff radius \(r_{\rm cut}=a\sigma\), and the test-particle number.

Definition at line 116 of file density.h.

      : sig_(par.gaussian_sigma),
        r_cut_(par.gauss_cutoff_in_sigma * par.gaussian_sigma),
        ntest_(par.testparticles) {
    r_cut_sqr_ = r_cut_ * r_cut_;
    const double two_sig_sqr = 2 * sig_ * sig_;
    two_sig_sqr_inv_ = 1. / two_sig_sqr;
    const double norm = smearing_factor_norm(two_sig_sqr);
    const double corr_factor =
        smearing_factor_rcut_correction(par.gauss_cutoff_in_sigma);
    norm_factor_sf_ = 1. / (norm * ntest_ * corr_factor);
  }

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Member Function Documentation

int smash::DensityParameters::ntest ( ) const

inline

Returns

Testparticle number

Definition at line 129 of file density.h.

{ return ntest_; }

double smash::DensityParameters::r_cut ( ) const

inline

Returns

Cut-off radius [fm]

Definition at line 131 of file density.h.

{ return r_cut_; }

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double smash::DensityParameters::r_cut_sqr ( ) const

inline

Returns

Squared cut-off radius [fm \(^2\)]

Definition at line 133 of file density.h.

{ return r_cut_sqr_; }

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double smash::DensityParameters::two_sig_sqr_inv ( ) const

inline

Returns

\( (2 \sigma^2)^{-1} \) [fm \(^{-2}\)]

Definition at line 135 of file density.h.

{ return two_sig_sqr_inv_; }

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double smash::DensityParameters::norm_factor_sf ( ) const

inline

Returns

Normalization for smearing factor. Unnormalized smearing factor \( sf(\vec{r}) \) has to be multiplied by this to have \( \int d^3r \, sf(\vec{r}) = 1 \).

Definition at line 141 of file density.h.

{ return norm_factor_sf_; }

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Member Data Documentation

const double smash::DensityParameters::sig_

private

Gaussian smearing width [fm].

Definition at line 145 of file density.h.

const double smash::DensityParameters::r_cut_

private

Cut-off radius [fm].

Definition at line 147 of file density.h.

double smash::DensityParameters::r_cut_sqr_

private

Squared cut-off radius [fm \(^2\)].

Definition at line 149 of file density.h.

double smash::DensityParameters::two_sig_sqr_inv_

private

\( (2 \sigma^2)^{-1} \) [fm \(^{-2}\)]

Definition at line 151 of file density.h.

double smash::DensityParameters::norm_factor_sf_

private

Normalization for smearing factor.

Definition at line 153 of file density.h.

const int smash::DensityParameters::ntest_

private

Testparticle number.

Definition at line 155 of file density.h.

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

• src/include/smash/density.h