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//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4UniversalFluctuation
//
// Author:        Vladimir Ivanchenko
// 
// Creation date: 03.01.2002
//
// Modifications: 09.12.2002 VI remove warnings
//
// Class Description: 
//
// Implementation of energy loss fluctuations

// -------------------------------------------------------------------
//

#ifndef G4UniversalFluctuation_h
#define G4UniversalFluctuation_h 1


#include "G4VEmFluctuationModel.hh"

class G4UniversalFluctuation : public G4VEmFluctuationModel
{

public:

  G4UniversalFluctuation();

  ~G4UniversalFluctuation();

  virtual void SampleFluctuations(const G4Material*, const G4DynamicParticle*,
 				        G4double&, G4double&, G4double); 

  virtual void Initialise(const G4ParticleDefinition*);

protected:

private:

  // hide assignment operator 
  G4UniversalFluctuation & operator=(const  G4UniversalFluctuation &right);
  G4UniversalFluctuation(const  G4UniversalFluctuation&);

  const G4ParticleDefinition* particle;
  G4double particleMass;
  G4double chargeSquare;

  const G4Material* lastMaterial;
  G4int materialIndex;

  // data members to speed up the fluctuation calculation
  G4double ipotFluct;
  G4double electronDensity;
  G4double zeff;
  
  G4double f1Fluct;
  G4double f2Fluct;
  G4double e1Fluct;
  G4double e2Fluct;
  G4double rateFluct;
  G4double e1LogFluct;
  G4double e2LogFluct;
  G4double ipotLogFluct;

  G4double minNumberInteractionsBohr;
  G4double theBohrBeta2;
  G4double minLoss;
  G4double problim;
  G4double sumalim;
  G4double alim;
  G4int    nmaxCont1;
  G4int    nmaxCont2;

};

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#endif