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// $Id: ExteIonisation.h,v 1.6 2015/10/27 11:02:53 sunss Exp $
// GEANT4 tag $Name: TrkExtAlg-00-00-64 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     ExteIonisation
//
// Author:        Laszlo Urban
//
// Creation date: 20.03.1997
//
// Modifications:
//
// 10-02-00 modifications , new e.m. structure, L.Urban
// 03-08-01 new methods Store/Retrieve PhysicsTable (mma)
// 13-08-01 new function ComputeRestrictedMeandEdx() (mma)
// 19-09-01 come back to previous ProcessName "eIoni"
// 29-10-01 all static functions no more inlined (mma)
// 07-01-02 new design of em processes (V.Ivanchenko)
// 26-12-02 Secondary production moved to derived classes (VI)
// 24-01-03 Make models region aware (V.Ivanchenko)
// 05-02-03 Fix compilation warnings (V.Ivanchenko)
// 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
// 23-05-03 Add fluctuation model as a member function (V.Ivanchenko)
// 03-06-03 Fix initialisation problem for STD ionisation (V.Ivanchenko)
// 08-08-03 STD substitute standard  (V.Ivanchenko)
// 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
// 21-01-04 Migrade to G4ParticleChangeForLoss (V.Ivanchenko)
// 
// ------------------------------------------------------------------------------------
// 15-04-05 Omit the correction of momentum direction due to production of secenderies.
//          This is needed for my Track Extrapotation. (L.L.Wang)
// ------------------------------------------------------------------------------------
// 
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
// 11-04-04 Move MaxSecondaryEnergy to models (V.Ivanchenko)
//
// Class Description:
//
// This class manages the ionisation process for e-/e+
// it inherites from G4VContinuousDiscreteProcess via G4VEnergyLossProcess.
//

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

#ifndef ExteIonisation_h
#define ExteIonisation_h 1

#include "G4VEnergyLossProcess.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"
#include "G4VEmModel.hh"

class G4Material;
class G4ParticleDefinition;
class G4VEmFluctuationModel;

class ExteIonisation : public G4VEnergyLossProcess
{

public:

  ExteIonisation(const G4String& name = "ExteIoni");

  ~ExteIonisation();

  G4bool IsApplicable(const G4ParticleDefinition& p);

  virtual void PrintInfo();
  // Print out of the class parameters

protected:
  
  std::vector<G4DynamicParticle*>* SecondariesPostStep(
                                   G4VEmModel*,
                             const G4MaterialCutsCouple*,
                             const G4DynamicParticle*,
                                   G4double&);

  virtual void InitialiseEnergyLossProcess(const G4ParticleDefinition*,const G4ParticleDefinition*);
  
  virtual G4double MinPrimaryEnergy(const G4ParticleDefinition*,
                                    const G4Material*, G4double cut);
  
private:

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

  const G4ParticleDefinition* theElectron;
  const G4ParticleDefinition* particle;
  G4VEmFluctuationModel* flucModel;

  G4bool isElectron;
  G4bool isInitialised;
};

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

inline G4double ExteIonisation::MinPrimaryEnergy(const G4ParticleDefinition*,
                                                   const G4Material*,
                                                         G4double cut)
{
  G4double x = cut;
  if(isElectron) x += cut;
  return x;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

inline G4bool ExteIonisation::IsApplicable(const G4ParticleDefinition& p)
{
  return (&p == G4Electron::Electron() || &p == G4Positron::Positron());
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

inline std::vector<G4DynamicParticle*>* ExteIonisation::SecondariesPostStep(
                                                  G4VEmModel* model,
                                            const G4MaterialCutsCouple* couple,
                                            const G4DynamicParticle* dp,
                                                  G4double& tcut)
{
  //return model->SampleSecondaries(couple,dp,tcut);
  return NULL;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

#endif

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