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25 //
26 /// \file GB01/include/GB01BOptrChangeCrossSection.hh
27 /// \brief Definition of the GB01BOptrChangeCrossSection class
28 //
29 //---------------------------------------------------------------
30 //
31 // GB01BOptrChangeCrossSection
32 //
33 // Class Description:
34 // A G4VBiasingOperator concrete implementation example to
35 // illustrate how to bias physics processes cross-section for
36 // one particle type.
37 // The G4VBiasingOperation G4BOptnChangeCrossSection is
38 // selected by this operator, and is sent to each process
39 // calling the operator.
40 // A simple constant bias to the cross-section is applied,
41 // but more sophisticated changes can be applied.
42 //
43 //---------------------------------------------------------------
44 //
45
46 #ifndef GB01BOptrChangeCrossSection_hh
47 #define GB01BOptrChangeCrossSection_hh 1
48
49 #include "G4VBiasingOperator.hh"
50 class G4BOptnChangeCrossSection;
51 class G4ParticleDefinition;
52 #include <map>
53
54 class GB01BOptrChangeCrossSection : public G4VBiasingOperator
55 {
56 public:
57 // ------------------------------------------------------------
58 // -- Constructor: takes the name of the particle type to bias:
59 // ------------------------------------------------------------
60 GB01BOptrChangeCrossSection(G4String particleToBias, G4String name = "ChangeXS");
61 virtual ~GB01BOptrChangeCrossSection();
62
63 // -- method called at beginning of run:
64 virtual void StartRun();
65
66 private:
67 // -----------------------------
68 // -- Mandatory from base class:
69 // -----------------------------
70 // -- This method returns the biasing operation that will bias the physics process occurence.
71 virtual G4VBiasingOperation*
72 ProposeOccurenceBiasingOperation(const G4Track* track,
73 const G4BiasingProcessInterface* callingProcess);
74 // -- Methods not used:
75 virtual G4VBiasingOperation* ProposeFinalStateBiasingOperation(const G4Track*,
76 const G4BiasingProcessInterface*)
77 {
78 return 0;
79 }
80 virtual G4VBiasingOperation* ProposeNonPhysicsBiasingOperation(const G4Track*,
81 const G4BiasingProcessInterface*)
82 {
83 return 0;
84 }
85
86 private:
87 // -- ("using" is avoid compiler complaining against (false) method shadowing.)
88 using G4VBiasingOperator::OperationApplied;
89
90 // -- Optionnal base class method implementation.
91 // -- This method is called to inform the operator that a proposed operation has been applied.
92 // -- In the present case, it means that a physical interaction occured (interaction at
93 // -- PostStepDoIt level):
94 virtual void OperationApplied(const G4BiasingProcessInterface* callingProcess,
95 G4BiasingAppliedCase biasingCase,
96 G4VBiasingOperation* occurenceOperationApplied,
97 G4double weightForOccurenceInteraction,
98 G4VBiasingOperation* finalStateOperationApplied,
99 const G4VParticleChange* particleChangeProduced);
100
101 private:
102 // -- List of associations between processes and biasing operations:
103 std::map<const G4BiasingProcessInterface*, G4BOptnChangeCrossSection*>
104 fChangeCrossSectionOperations;
105 G4bool fSetup;
106 const G4ParticleDefinition* fParticleToBias;
107 };
108
109 #endif
110