LandauFluctuationGenerator Class Reference

#include <LandauFluctuationGenerator.h>

Inheritance diagram for LandauFluctuationGenerator:

List of all members.

Public Member Functions
virtual double	function (double x)
	The probability density function implementation.
double	landau () const
	Random generator of the dE/dX spread (Landau function)
	LandauFluctuationGenerator (const RandomEngine *engine)
	Constructor : initialization of the Random Generator.
virtual	~LandauFluctuationGenerator ()
	Default destructor.
Private Member Functions
double	ersatzt (double x)
	Ersatzt for Landau Fluctuations (very good approximation)

---

Detailed Description

Definition at line 20 of file LandauFluctuationGenerator.h.

---

Constructor & Destructor Documentation

LandauFluctuationGenerator::LandauFluctuationGenerator

(

const RandomEngine *

engine

)

[inline]

Constructor : initialization of the Random Generator.

Definition at line 25 of file LandauFluctuationGenerator.h.

References BaseNumericalRandomGenerator::initialize().

                                                         : 
    BaseNumericalRandomGenerator(engine,-3.5,25.) {
    initialize();
  }

virtual LandauFluctuationGenerator::~LandauFluctuationGenerator

(

)

[inline, virtual]

Default destructor.

Definition at line 31 of file LandauFluctuationGenerator.h.

{}

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Member Function Documentation

double LandauFluctuationGenerator::ersatzt

(

double

x

)

[inline, private]

Ersatzt for Landau Fluctuations (very good approximation)

Definition at line 42 of file LandauFluctuationGenerator.h.

References funct::exp(), M_PI, and mathSSE::sqrt().

Referenced by function().

                           { 
    return  std::exp(-0.5 * ( x + std::exp(-x) )) / std::sqrt (2. *M_PI); 
  }

virtual double LandauFluctuationGenerator::function

(

double

x

)

[inline, virtual]

The probability density function implementation.

Implements BaseNumericalRandomGenerator.

Definition at line 37 of file LandauFluctuationGenerator.h.

References ersatzt().

{ return ersatzt(x); }

double LandauFluctuationGenerator::landau

(

)

const [inline]

Random generator of the dE/dX spread (Landau function)

Definition at line 34 of file LandauFluctuationGenerator.h.

References BaseNumericalRandomGenerator::generate().

Referenced by PreshowerHitMaker::addHit(), and EnergyLossSimulator::compute().

{ return generate(); }