Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/biasing/generic/include/G4BOptnChangeCrossSection.hh

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 25 //
 26 // G4BOptnChangeCrossSection
 27 //
 28 // Class Description:
 29 //
 30 // A G4VBiasingOperation to change a process cross-section.
 31 //    
 32 // Author: Marc Verderi, November 2013
 33 // --------------------------------------------------------------------
 34 #ifndef G4BOptnChangeCrossSection_hh
 35 #define G4BOptnChangeCrossSection_hh 1
 36 
 37 #include "G4VBiasingOperation.hh"
 38 
 39 class G4InteractionLawPhysical;
 40 
 41 class G4BOptnChangeCrossSection : public G4VBiasingOperation
 42 {
 43   public:
 44 
 45     // -- Constructor :
 46     G4BOptnChangeCrossSection(const G4String& name);
 47     // -- destructor:
 48     virtual ~G4BOptnChangeCrossSection();
 49   
 50     // -- Methods from G4VBiasingOperation interface:
 51     // ----------------------------------------------
 52     // -- Used:
 53     virtual const G4VBiasingInteractionLaw*
 54     ProvideOccurenceBiasingInteractionLaw( const G4BiasingProcessInterface*,
 55                     G4ForceCondition& proposeForceCondition );
 56   
 57     // -- Unused:
 58     virtual G4VParticleChange*
 59     ApplyFinalStateBiasing( const G4BiasingProcessInterface*,
 60                     const G4Track*, const G4Step*, G4bool& ) { return nullptr; }
 61     virtual G4double DistanceToApplyOperation( const G4Track*,
 62                     G4double, G4ForceCondition* ) { return DBL_MAX; }
 63     virtual G4VParticleChange* GenerateBiasingFinalState( const G4Track*,
 64                     const G4Step* ) { return nullptr; }
 65   
 66     // -- Additional methods, specific to this class:
 67     // ----------------------------------------------
 68     // -- return concrete type of interaction law:
 69     G4InteractionLawPhysical* GetBiasedExponentialLaw() { return fBiasedExponentialLaw; }
 70     // -- set biased cross-section:
 71     void SetBiasedCrossSection(G4double xst, G4bool updateInteractionLength=false);
 72     G4double GetBiasedCrossSection() const;
 73     // -- Sample underneath distribution:
 74     void Sample();
 75     // -- Update for a made step, without resampling:
 76     void UpdateForStep( G4double stepLength );
 77     // -- set/get if interaction occured. 
 78     // -- Interaction flag turned off in "Sample()" method.
 79     G4bool GetInteractionOccured() const { return fInteractionOccured; }
 80     void SetInteractionOccured() { fInteractionOccured = true; }
 81 
 82   private:
 83 
 84     G4InteractionLawPhysical* fBiasedExponentialLaw = nullptr;
 85     G4bool fInteractionOccured = false;
 86 };
 87 
 88 #endif
 89