| Geant4 Cross Reference |
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25 //
26 // Utility class to process contents of G4KineticTrackVector (input to
27 // models' ::Propagate() interface) and decay any short-lived resonances.
28 // Resulting daughters are added to vector (no function or return needed).
29 //
30 // Author: Michael Kelsey <kelsey@slac.stanford.edu>
31
32 #include "G4DecayKineticTracks.hh"
33 #include "G4KineticTrackVector.hh"
34 #include "G4KineticTrack.hh"
35
36
37 // Decay all input tracks, put daughters onto end of list
38
39 G4DecayKineticTracks::G4DecayKineticTracks(G4KineticTrackVector *tracks) {
40
41 if (tracks) Decay(tracks);
42 }
43
44 void G4DecayKineticTracks::Decay(G4KineticTrackVector *tracks) const {
45
46 if (!tracks) return;
47
48 G4KineticTrackVector* daughters = 0;
49 for (size_t i=0; i<tracks->size(); ++i) {
50 G4KineticTrack* track = (*tracks)[i];
51 if (!track) continue;
52
53 // Select decay of current track, put daughters at end of vector
54 daughters = track->GetDefinition()->IsShortLived() ? track->Decay() : 0;
55
56 if (daughters) {
57 // Use the integer round mass in keV to get an unique ID for the parent resonance
58 G4int uniqueID = static_cast< G4int >( round( track->Get4Momentum().mag() / CLHEP::keV ) );
59
60 // Assign to the daughters the creator model ID of their parent
61 for (size_t k=0; k<daughters->size(); ++k) {
62 G4KineticTrack* aDaughter = (*daughters)[k];
63 if (aDaughter) {
64 aDaughter->SetCreatorModelID(track->GetCreatorModelID());
65 aDaughter->SetParentResonanceDef(track->GetDefinition());
66 aDaughter->SetParentResonanceID(uniqueID);
67 }
68 }
69
70 tracks->insert(tracks->end(), daughters->begin(), daughters->end());
71 delete track; // Remove parent track
72 delete daughters;
73 (*tracks)[i] = nullptr; // Flag parent's slot for removal
74 }
75 }
76
77 // Find and remove null pointers created by decays above
78 for (G4int j=(G4int)tracks->size()-1; j>=0; --j) {
79 if (nullptr == (*tracks)[j]) tracks->erase(tracks->begin()+j);
80 }
81 }
82