Geant4_10
GB01BOptrChangeCrossSection.hh
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26 // $Id: $
27 //---------------------------------------------------------------
28 //
29 // GB01BOptrChangeCrossSection
30 //
31 // Class Description:
32 // A G4VBiasingOperator concrete implementation example to
33 // illustrate how to bias physics processes cross-section for
34 // one particle type.
35 // The G4VBiasingOperation G4BOptnChangeCrossSection is
36 // selected by this operator, and is sent to each process
37 // calling the operator.
38 // A simple constant bias to the cross-section is applied,
39 // but more sophisticated changes can be applied.
40 //
41 //---------------------------------------------------------------
42 //
43 
44 #ifndef GB01BOptrChangeCrossSection_hh
45 #define GB01BOptrChangeCrossSection_hh 1
46 
47 #include "G4VBiasingOperator.hh"
50 class G4VProcess;
51 #include <map>
52 
53 
55 public:
56  // ------------------------------------------------------------
57  // -- Constructor: takes the name of the particle type to bias:
58  // ------------------------------------------------------------
59  GB01BOptrChangeCrossSection(G4String particleToBias, G4String name = "ChangeXS");
61 
62 
63 private:
64  // -----------------------------
65  // -- Mandatory from base class:
66  // -----------------------------
67  // -- This method returns the biasing operation that will bias the physics process occurence.
68  virtual G4VBiasingOperation*
69  ProposeOccurenceBiasingOperation(const G4Track* track,
70  const G4BiasingProcessInterface* callingProcess);
71  // -- Methods not used:
72  virtual G4VBiasingOperation*
73  ProposeFinalStateBiasingOperation(const G4Track*, const G4BiasingProcessInterface*)
74  {return 0;}
75  virtual G4VBiasingOperation*
76  ProposeNonPhysicsBiasingOperation(const G4Track*, const G4BiasingProcessInterface*)
77  {return 0;}
78 
79 private:
80  // -- ("using" is avoid compiler complaining against (false) method shadowing.)
82 
83  // -- Optionnal base class method implementation.
84  // -- This method is called to inform the operator that a proposed operation has been applied.
85  // -- In the present case, it means that a physical interaction occured (interaction at
86  // -- PostStepDoIt level):
87  virtual void OperationApplied( const G4BiasingProcessInterface* callingProcess,
88  G4BiasingAppliedCase biasingCase,
89  G4VBiasingOperation* occurenceOperationApplied,
90  G4double weightForOccurenceInteraction,
91  G4VBiasingOperation* finalStateOperationApplied,
92  const G4VParticleChange* particleChangeProduced );
93 
94 private:
95  // -- List of associations between processes and biasing operations:
96  std::map< const G4BiasingProcessInterface*,
97  G4BOptnChangeCrossSection* > fChangeCrossSectionOperations;
98  const G4VProcess *fFirstProcess, *fLastProcess;
99  G4bool fSetup;
100  const G4ParticleDefinition* fParticleToBias;
101 
102 };
103 
104 #endif
virtual void OperationApplied(const G4BiasingProcessInterface *callingProcess, G4BiasingAppliedCase biasingCase, G4VBiasingOperation *operationApplied, const G4VParticleChange *particleChangeProduced)
const XML_Char * name
Definition: expat.h:151
GB01BOptrChangeCrossSection(G4String particleToBias, G4String name="ChangeXS")
G4BiasingAppliedCase
bool G4bool
Definition: G4Types.hh:79
double G4double
Definition: G4Types.hh:76