G4DecayKineticTracks.cc

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00025 //
00026 // Utility class to process contents of G4KineticTrackVector (input to
00027 // models' ::Propagate() interface) and decay any short-lived resonances.
00028 // Resulting daughters are added to vector (no function or return needed).
00029 //
00030 // Author:  Michael Kelsey <kelsey@slac.stanford.edu>
00031 
00032 #include "G4DecayKineticTracks.hh"
00033 #include "G4KineticTrackVector.hh"
00034 #include "G4KineticTrack.hh"
00035 
00036 
00037 // Decay all input tracks, put daughters onto end of list
00038 
00039 G4DecayKineticTracks::G4DecayKineticTracks(G4KineticTrackVector *tracks) {
00040   if (tracks) Decay(tracks);
00041 }
00042 
00043 void G4DecayKineticTracks::Decay(G4KineticTrackVector *tracks) const {
00044   if (!tracks) return;
00045 
00046   G4KineticTrackVector* daughters = 0;
00047   for (size_t i=0; i<tracks->size(); ++i) {
00048     G4KineticTrack* track = (*tracks)[i];
00049     if (!track) continue;
00050 
00051     // Select decay of current track, put daughters at end of vector
00052     daughters = track->GetDefinition()->IsShortLived() ? track->Decay() : 0;
00053     if (daughters) {
00054       tracks->insert(tracks->end(), daughters->begin(), daughters->end());
00055       delete track;             // Remove parent track
00056       delete daughters;
00057       (*tracks)[i] = NULL;      // Flag parent's slot for removal
00058     }
00059   }
00060 
00061   // Find and remove null pointers created by decays above
00062   for (int j=tracks->size()-1; j>=0; --j) {
00063     if (NULL == (*tracks)[j]) tracks->erase(tracks->begin()+j);
00064   }
00065 }

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