Geant4 Cross Reference

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Geant4/examples/basic/B5/src/DriftChamberSD.cc

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 25 //
 26 //
 27 /// \file B5/src/DriftChamberSD.cc
 28 /// \brief Implementation of the B5::DriftChamber class
 29 
 30 #include "DriftChamberSD.hh"
 31 
 32 #include "DriftChamberHit.hh"
 33 
 34 #include "G4HCofThisEvent.hh"
 35 #include "G4SDManager.hh"
 36 #include "G4Step.hh"
 37 #include "G4Track.hh"
 38 
 39 namespace B5
 40 {
 41 
 42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 43 
 44 DriftChamberSD::DriftChamberSD(G4String name) : G4VSensitiveDetector(name)
 45 {
 46   collectionName.insert("driftChamberColl");
 47 }
 48 
 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 50 
 51 void DriftChamberSD::Initialize(G4HCofThisEvent* hce)
 52 {
 53   fHitsCollection = new DriftChamberHitsCollection(SensitiveDetectorName, collectionName[0]);
 54 
 55   if (fHCID < 0) {
 56     fHCID = G4SDManager::GetSDMpointer()->GetCollectionID(fHitsCollection);
 57   }
 58   hce->AddHitsCollection(fHCID, fHitsCollection);
 59 }
 60 
 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 62 
 63 G4bool DriftChamberSD::ProcessHits(G4Step* step, G4TouchableHistory*)
 64 {
 65   auto charge = step->GetTrack()->GetDefinition()->GetPDGCharge();
 66   if (charge == 0.) return true;
 67 
 68   auto preStepPoint = step->GetPreStepPoint();
 69 
 70   auto touchable = step->GetPreStepPoint()->GetTouchable();
 71   auto motherPhysical = touchable->GetVolume(1);  // mother
 72   auto copyNo = motherPhysical->GetCopyNo();
 73 
 74   auto worldPos = preStepPoint->GetPosition();
 75   auto localPos = touchable->GetHistory()->GetTopTransform().TransformPoint(worldPos);
 76 
 77   auto hit = new DriftChamberHit(copyNo);
 78   hit->SetWorldPos(worldPos);
 79   hit->SetLocalPos(localPos);
 80   hit->SetTime(preStepPoint->GetGlobalTime());
 81 
 82   fHitsCollection->insert(hit);
 83 
 84   return true;
 85 }
 86 
 87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 88 
 89 }  // namespace B5
 90