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G4BOptnForceFreeFlight.hh
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27 // $Id: $
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29 //---------------------------------------------------------------
30 //
31 // G4BOptnForceFreeFlight
32 //
33 // Class Description:
34 // A G4VBiasingOperation physics-based biasing operation.
35 // If forces the physics process to not act on the track.
36 // In this implementation (meant for the ForceCollision
37 // operator) the free flight is done under zero weight for
38 // the track, and the action is meant to accumulate the weight
39 // change for making this uninteracting flight,
40 // cumulatedWeightChange.
41 // When the track reaches the current volume boundary, its
42 // weight is restored with value :
43 // initialWeight * cumulatedWeightChange
44 //
45 //---------------------------------------------------------------
46 // Initial version Nov. 2013 M. Verderi
47 #ifndef G4BOptnForceFreeFlight_hh
48 #define G4BOptnForceFreeFlight_hh 1
49 
50 #include "G4VBiasingOperation.hh"
51 #include "G4ForceCondition.hh"
52 #include "G4ParticleChange.hh" // -- ยงยง should add a dedicated "weight change only" particle change
54 
55 
57 public:
58  // -- Constructor :
60  // -- destructor:
61  virtual ~G4BOptnForceFreeFlight();
62 
63 public:
64  // -- Methods from G4VBiasingOperation interface:
65  // -------------------------------------------
66  // -- Used:
68  virtual void AlongMoveBy( const G4BiasingProcessInterface*, const G4Step*, G4double );
70 
71  // -- Unused:
73  G4double,
74  G4ForceCondition*) {return DBL_MAX;}
76  const G4Step* ) {return 0;}
77 
78 
79 public:
80  // -- Additional methods, specific to this class:
81  // ----------------------------------------------
82  // -- return concrete type of interaction law:
84  return fForceFreeFlightInteractionLaw;
85  }
86  // -- initialization for weight:
87  void ResetInitialTrackWeight(G4double w) {fInitialTrackWeight = w; fCumulatedWeightChange = 1.0;}
88  G4bool OperationComplete() const { return fOperationComplete; }
89 
90 private:
91  G4ILawForceFreeFlight* fForceFreeFlightInteractionLaw;
92  G4double fCumulatedWeightChange,
93  fInitialTrackWeight;
94  G4ParticleChange fParticleChange;
95  G4bool fOperationComplete;
96 };
97 
98 #endif
const XML_Char * name
Definition: expat.h:151
virtual const G4VBiasingInteractionLaw * ProvideOccurenceBiasingInteractionLaw(const G4BiasingProcessInterface *, G4ForceCondition &)
virtual G4VParticleChange * ApplyFinalStateBiasing(const G4BiasingProcessInterface *, const G4Track *, const G4Step *, G4bool &)
void ResetInitialTrackWeight(G4double w)
bool G4bool
Definition: G4Types.hh:79
virtual G4double DistanceToApplyOperation(const G4Track *, G4double, G4ForceCondition *)
Definition: G4Step.hh:76
G4ILawForceFreeFlight * GetForceFreeFlightLaw()
virtual void AlongMoveBy(const G4BiasingProcessInterface *, const G4Step *, G4double)
double G4double
Definition: G4Types.hh:76
G4ForceCondition
#define DBL_MAX
Definition: templates.hh:83
virtual G4VParticleChange * GenerateBiasingFinalState(const G4Track *, const G4Step *)