| Geant4 Cross Reference |
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25 //
26 // G4ParticleChangeForOccurenceBiasing
27 // --------------------------------------------------------------------
28
29 #include "G4ParticleChangeForOccurenceBiasing.hh"
30
31 G4ParticleChangeForOccurenceBiasing::
32 G4ParticleChangeForOccurenceBiasing(const G4String& name)
33 : G4VParticleChange(),
34 fName(name)
35 {}
36
37 void G4ParticleChangeForOccurenceBiasing::
38 SetWrappedParticleChange(G4VParticleChange* wpc)
39 {
40 fWrappedParticleChange = wpc;
41 }
42
43 void G4ParticleChangeForOccurenceBiasing::StealSecondaries()
44 {
45 SetNumberOfSecondaries( fWrappedParticleChange->GetNumberOfSecondaries() );
46 for (G4int isecond = 0; isecond < fWrappedParticleChange->GetNumberOfSecondaries(); isecond++)
47 {
48 G4Track* secondary = fWrappedParticleChange->GetSecondary(isecond);
49 secondary->SetWeight ( secondary->GetWeight() * fOccurenceWeightForInteraction );
50 AddSecondary( secondary );
51 }
52 fWrappedParticleChange->Clear();
53 }
54
55 G4Step* G4ParticleChangeForOccurenceBiasing::UpdateStepForAtRest(G4Step* step)
56 {
57 return step;
58 }
59
60 G4Step* G4ParticleChangeForOccurenceBiasing::UpdateStepForAlongStep(G4Step* step)
61 {
62 // -- make particle change of wrapped process to apply its changes:
63 if ( fWrappedParticleChange )
64 fWrappedParticleChange->UpdateStepForAlongStep( step );
65
66 // -- multiply parent weight by weight due to occurrence biasing:
67 G4StepPoint* postStepPoint = step->GetPostStepPoint();
68 postStepPoint->SetWeight( postStepPoint->GetWeight()*fOccurenceWeightForNonInteraction );
69
70 return step;
71 }
72
73 G4Step* G4ParticleChangeForOccurenceBiasing::UpdateStepForPostStep(G4Step* step)
74 {
75 // -- let make first wrapped process to apply its changes:
76 fWrappedParticleChange->UpdateStepForPostStep(step);
77 // -- then apply weight correction due to occurrence biasing:
78 G4StepPoint* postStepPoint = step->GetPostStepPoint();
79 postStepPoint->SetWeight( postStepPoint->GetWeight()*fOccurenceWeightForInteraction );
80
81 return step;
82 }
83