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// $Id: G4HEInelastic.hh,v 1.14 2007/04/11 18:11:30 dennis Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
//
// G4 Gheisha High Energy (GHE) model class -- header file
// H. Fesefeldt, RWTH Aachen 23-October-1996
// Last modified: 10-December-1996

// A prototype of the Gheisha High Energy collision model.
// It includes all Physics Routines from Geant3,
// relevant for simulation of hadronic processes
// above approx. 20 GeV incident momentum.
// Not included are the Physics Routines for
// stopping particles, the low energy neutron
// slowing down description and the low energy
// nuclear reactions a(A,A')b.
// All routines pass the compiler and give
// some reasonable numbers as output.
// A statistically significant comparison
// with GEANT3 and experimental data has
// still to be done. 

#ifndef G4HEInelastic_h
#define G4HEInelastic_h 1

// Class description:
// Each of the high energy parameterized models (e.g. G4HEProtonInelastic)
// derives from the G4HEInelastic class. This class contains the various
// algorithms needed to implement the interaction. These include 
// lambda-fragmentation, meson and nucleon cluster formation and decay, 
// nuclear cascade, and nuclear de-excitation.  
//
// This class is derived from G4HadronicInteraction.

// Class Description - End

#include "G4HEVector.hh"
#include "G4HadronicInteraction.hh"

class G4HEInelastic : public G4HadronicInteraction
{
 public:  // with description 
   G4HEInelastic(const G4String& modelName = "HEInelastic") 
    : G4HadronicInteraction(modelName)
   { 
     SetParticles();
     conserveEnergy = true;
   };

   ~G4HEInelastic(){ };
         
   void       SetMaxNumberOfSecondaries( const G4int maxnumber ) 
                   { MAXPART = maxnumber;}      
 
   void       SetVerboseLevel( const G4int level)
                   { verboseLevel = level;}

   G4int      verboseLevel; 
   G4int      MAXPART;
   G4bool     conserveEnergy;

   void       ForceEnergyConservation(G4bool energyConservation)
                   { conserveEnergy = energyConservation;}
   G4bool     EnergyConservation(void)
                   { return conserveEnergy;} 

   G4double   Amin(G4double a, G4double b);
   G4double   Amax(G4double a, G4double b);
   G4int      Imin(G4int a, G4int b);
   G4int      Imax(G4int a, G4int b);
 
   void       FillParticleChange(G4HEVector pv[], G4int aVecLength);

   G4double   pmltpc(G4int np, G4int nm, G4int nz, G4int n, G4double b, G4double c);

   G4int      Factorial(G4int n); 

   G4double   NuclearInelasticity(G4double incidentKineticEnergy,
                                  G4double atomicWeight,
                                  G4double atomicNumber);
   G4double   NuclearExcitation(G4double  incidentKineticEnergy,
                                G4double  atomicWeight,
                                G4double  atomicNumber,
                                G4double& excitationEnergyCascade,
                                G4double& excitationEnergyEvaporation); 
   
   void       HighEnergyCascading(G4bool &successful,
                                  G4HEVector pv[],
                                  G4int &vecLen,
                                  G4double &excitationEnergyGNP,
                                  G4double &excitationEnergyDTA, 
                                  G4HEVector incidentParticle,
                                  G4HEVector targetParticle,
                                  G4double atomicWeight,
                                  G4double atomicNumber);                        

   void       HighEnergyClusterProduction(G4bool &successful,
                                          G4HEVector pv[],
                                          G4int &vecLen,
                                          G4double &excitationEnergyGNP,
                                          G4double &excitationEnergyDTA, 
                                          G4HEVector incidentParticle,
                                          G4HEVector targetParticle,
                                          G4double atomicWeight,
                                          G4double atomicNumber);             

   void       TuningOfHighEnergyCascading(G4HEVector pv[],
                                          G4int &vecLen,
                                          G4HEVector incidentParticle,
                                          G4HEVector targetParticle,
                                          G4double atomicWeight,
                                          G4double atomicNumber);   

   void       MediumEnergyCascading(G4bool &successful,
                                    G4HEVector pv[],
                                    G4int &vecLen,
                                    G4double &excitationEnergyGNP,
                                    G4double &excitationEnergyDTA,
                                    G4HEVector incidentParticle,
                                    G4HEVector targetParticle,
                                    G4double atomicWeight,
                                    G4double atomicNumber);            

   void       MediumEnergyClusterProduction(G4bool &successful,
                                            G4HEVector pv[],
                                            G4int &vecLen,
                                            G4double &excitationEnergyGNP,
                                            G4double &excitationEnergyDTA,
                                            G4HEVector incidentParticle,
                                            G4HEVector targetParticle,
                                            G4double atomicWeight,
                                            G4double atomicNumber);            

   void       QuasiElasticScattering(G4bool &successful,
                                     G4HEVector pv[],
                                     G4int &vecLen,
                                     G4double &excitationEnergyGNP,
                                     G4double &excitationEnergyDTA, 
                                     G4HEVector incidentParticle,
                                     G4HEVector targetParticle,
                                     G4double atomicWeight,
                                     G4double atomicNumber);

   void       ElasticScattering(G4bool &successful,
                                G4HEVector pv[],
                                G4int &vecLen,                      
                                G4HEVector incidentParticle,
                                G4double atomicWeight,
                                G4double atomicNumber); 

   G4int      rtmi(G4double *x, G4double xli, G4double xri, G4double eps,
                   G4int iend, G4double aa, G4double bb, G4double cc, 
                   G4double dd, G4double rr);

   G4double   fctcos(G4double t, G4double aa, G4double bb,G4double cc, 
                     G4double dd, G4double rr);     
        
   void       StrangeParticlePairProduction(const G4double availableEnergy,
                                            const G4double centerOfMassEnergy,
                                            G4HEVector pv[],
                                            G4int &vecLen,
                                            G4HEVector incidentParticle,
                                            G4HEVector targetParticle); 

   G4double   NBodyPhaseSpace(const G4double totalEnergy,
                              const G4bool   constantCrossSection,
                              G4HEVector pv[],
                              G4int &vecLen);
     
   G4double   NBodyPhaseSpace(G4int npart, 
                              G4HEVector pv[],
                              G4double wmax,
                              G4double wfcn,
                              G4int maxtrial,
                              G4int ntrial);

   G4double   gpdk(G4double a, G4double b, G4double c);

   void       QuickSort(G4double arr[], const G4int lidx, const G4int ridx);

   G4double   Alam(G4double a, G4double b, G4double c);
 
   G4double   CalculatePhaseSpaceWeight( G4int npart);
       
   G4double   normal(void);
   G4double   GammaRand(G4double avalue);
   G4double   Erlang(G4int mvalue);
   G4int      Poisson(G4double x);
   void       SetParticles(void);

   G4HEVector PionPlus;
   G4HEVector PionZero;
   G4HEVector PionMinus;             
   G4HEVector KaonPlus;
   G4HEVector KaonZero;
   G4HEVector AntiKaonZero;             
   G4HEVector KaonMinus;
   G4HEVector KaonZeroShort; 
   G4HEVector KaonZeroLong;
   G4HEVector Proton;
   G4HEVector AntiProton;
   G4HEVector Neutron;             
   G4HEVector AntiNeutron;
   G4HEVector Lambda;
   G4HEVector AntiLambda;             
   G4HEVector SigmaPlus;
   G4HEVector SigmaZero; 
   G4HEVector SigmaMinus;
   G4HEVector AntiSigmaPlus;
   G4HEVector AntiSigmaZero; 
   G4HEVector AntiSigmaMinus;
   G4HEVector XiZero;             
   G4HEVector XiMinus;
   G4HEVector AntiXiZero; 
   G4HEVector AntiXiMinus;
   G4HEVector OmegaMinus;
   G4HEVector AntiOmegaMinus; 
   G4HEVector Deuteron;
   G4HEVector Triton;
   G4HEVector Alpha;                         
   G4HEVector Gamma;
};

#endif                     
                                         

