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Geant4/examples/extended/biasing/GB01/include/GB01BOptrMultiParticleChangeCrossSection.hh

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  /// \file GB01/include/GB01BOptrMultiParticleChangeCrossSection.hh
  /// \brief Definition of the GB01BOptrMultiParticleChangeCrossSection class
  //
  //-----------------------------------------------------------------
  //
  // GB01BOptrMultiParticleChangeCrossSection
  //
  // Class Description:
  //        A G4VBiasingOperator concrete implementation example to
  //    illustrate how an operator can make use of an other operator.
  //        In the present case, the GB01BOptrChangeCrossSection
  //    operator, that is made to bias processes of one particle
  //    type is instancied several times, one for each particle type
  //    to bias.
  //
  //-----------------------------------------------------------------
  //
  
  #ifndef GB01BOptrMultiParticleChangeCrossSection_hh
  #define GB01BOptrMultiParticleChangeCrossSection_hh 1
  
  #include "G4VBiasingOperator.hh"
  class GB01BOptrChangeCrossSection;
  class G4ParticleDefinition;
  
  #include <map>
  
  class GB01BOptrMultiParticleChangeCrossSection : public G4VBiasingOperator
  {
    public:
      GB01BOptrMultiParticleChangeCrossSection();
      virtual ~GB01BOptrMultiParticleChangeCrossSection() {}
  
      // ---------------------------------
      // -- Method specific to this class:
      // ---------------------------------
      // -- Each particle type for which its name is passed will be biased; *provided*
      // -- that the proper calls to biasingPhysics->Bias(particleName) have been done
      // -- in the main program.
      void AddParticle(G4String particleName);
  
    private:
      // -----------------------------
      // -- Mandatory from base class:
      // -----------------------------
      // -- This method returns a biasing operation that will bias the physics process occurence:
      virtual G4VBiasingOperation*
      ProposeOccurenceBiasingOperation(const G4Track* track,
                                       const G4BiasingProcessInterface* callingProcess);
      // -- Methods not used:
      virtual G4VBiasingOperation* ProposeFinalStateBiasingOperation(const G4Track*,
                                                                     const G4BiasingProcessInterface*)
      {
        return 0;
      }
      virtual G4VBiasingOperation* ProposeNonPhysicsBiasingOperation(const G4Track*,
                                                                     const G4BiasingProcessInterface*)
      {
        return 0;
      }
  
    private:
      // -- ("using" is to avoid compiler complaining against (false) method shadowing.)
      using G4VBiasingOperator::OperationApplied;
  
      // -- Optionnal base class method implementation.
      // -- This method is called to inform the operator that a proposed operation has been applied.
      // -- In the present case, it means that a physical interaction occured (interaction at
      // -- PostStepDoIt level):
      virtual void OperationApplied(const G4BiasingProcessInterface* callingProcess,
                                    G4BiasingAppliedCase biasingCase,
                                    G4VBiasingOperation* occurenceOperationApplied,
                                    G4double weightForOccurenceInteraction,
                                    G4VBiasingOperation* finalStateOperationApplied,
                                   const G4VParticleChange* particleChangeProduced);
 
   public:
     // -- Optionnal base class method. It is called at the time a tracking of a particle starts:
     void StartTracking(const G4Track* track);
 
   private:
     // -- List of associations between particle types and biasing operators:
     std::map<const G4ParticleDefinition*, GB01BOptrChangeCrossSection*> fBOptrForParticle;
     std::vector<const G4ParticleDefinition*> fParticlesToBias;
     GB01BOptrChangeCrossSection* fCurrentOperator;
 
     // -- count number of biased interations for current track:
     G4int fnInteractions;
 };
 
 #endif