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SplitProcess.cc
Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file SplitProcess.cc
1 //
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18 // * This code implementation is the result of the scientific and *
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25 //
26 // This example is provided by the Geant4-DNA collaboration
27 // Any report or published results obtained using the Geant4-DNA software
28 // shall cite the following Geant4-DNA collaboration publication:
29 // Med. Phys. 37 (2010) 4692-4708
30 // The Geant4-DNA web site is available at http://geant4-dna.org
31 //
34 
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36 
37 #include "SplitProcess.hh"
38 #include "UserTrackInformation.hh"
39 
40 #include "G4Track.hh"
41 #include "G4VParticleChange.hh"
42 #include "G4LogicalVolume.hh"
43 #include "G4TouchableHandle.hh"
44 #include "G4Region.hh"
45 #include "G4RegionStore.hh"
46 
47 #include <vector>
48 
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50 
52 :fRegionName(regName), fNSplit(nsplit)
53 {
55 }
56 
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58 
60 }
61 
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63 
65  G4VParticleChange* particleChange(0);
66 
68  ->GetRegion() != fRegion ) {
69  particleChange = pRegProcess->PostStepDoIt(track, step);
70  assert ( 0 != particleChange);
71  return particleChange;
72  }
73 
74  if ( fNSplit == 1 ) {
75  particleChange = pRegProcess->PostStepDoIt(track, step);
76  assert ( 0 != particleChange);
77  return particleChange;
78  }
79 
80  UserTrackInformation* parentInformation =
82  G4int initialSplitTrackID = parentInformation->GetSplitTrackID();
83 
84  if ( initialSplitTrackID > 1 ) {
85  particleChange = pRegProcess->PostStepDoIt(track, step);
86  assert ( 0 != particleChange);
87  return particleChange;
88  }
89 
90  G4double weight = track.GetWeight()/fNSplit;
91  G4int splitTrackID = 3;
92 
93  std::vector<G4Track*> secondaries;
94  std::vector<G4int> vSplitTrack;
95 
96  for ( int i = 0; i < fNSplit; i++ ) {
97  particleChange = pRegProcess->PostStepDoIt(track, step);
98  assert( 0 != particleChange);
99  particleChange->SetVerboseLevel(0);
100  G4Track* newTrack = new G4Track(*(particleChange->GetSecondary(0)));
101 
102  secondaries.push_back( newTrack );
103  vSplitTrack.push_back( splitTrackID );
104 
105  splitTrackID++;
106  }
107 
108  parentInformation->SetSplitTrackID(2);
109 
110  particleChange->SetNumberOfSecondaries(secondaries.size());
111  particleChange->SetSecondaryWeightByProcess(true);
112 
113  std::vector<G4Track*>::iterator iter = secondaries.begin();
114  G4int i = 0;
115  while( iter != secondaries.end() ) {
116  G4Track* newTrack = *iter;
117  newTrack->SetWeight(weight);
118 
119  UserTrackInformation* secondaryInformation = new UserTrackInformation();
120  secondaryInformation->SetSplitTrackID(vSplitTrack[i]);
121  newTrack->SetUserInformation(secondaryInformation);
122 
123  particleChange->AddSecondary(newTrack);
124 
125  iter++;
126  i++;
127  }
128 
129  return particleChange;
130 }
131 
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