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Geant4/examples/extended/exoticphysics/saxs/src/SAXSSteppingAction.cc

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 25 //
 26 /// \file SAXSSteppingAction.cc
 27 /// \brief Definition of the SAXSSteppingAction class
 28 //
 29 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 30 
 31 #ifdef G4MULTITHREADED
 32 #  include "G4MTRunManager.hh"
 33 #else
 34 #  include "G4RunManager.hh"
 35 #endif
 36 
 37 #include "SAXSDetectorConstruction.hh"
 38 #include "SAXSEventAction.hh"
 39 #include "SAXSSteppingAction.hh"
 40 
 41 #include "G4AnalysisManager.hh"
 42 #include "G4Event.hh"
 43 #include "G4EventManager.hh"
 44 #include "G4HCofThisEvent.hh"
 45 #include "G4OpticalPhoton.hh"
 46 #include "G4SDManager.hh"
 47 #include "G4Step.hh"
 48 #include "G4SystemOfUnits.hh"
 49 #include "G4Track.hh"
 50 #include "G4Trajectory.hh"
 51 #include "G4TrajectoryContainer.hh"
 52 #include "G4UImanager.hh"
 53 #include "G4VHitsCollection.hh"
 54 #include "G4VVisManager.hh"
 55 #include "G4ios.hh"
 56 
 57 #include <cmath>
 58 
 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 60 
 61 SAXSSteppingAction::SAXSSteppingAction(SAXSEventAction* eventAction)
 62   : G4UserSteppingAction(), fEventAction(eventAction), fPhantom(0), fEventNumber(-1), fNSe(0)
 63 {}
 64 
 65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 66 
 67 SAXSSteppingAction::~SAXSSteppingAction() {}
 68 
 69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 70 
 71 void SAXSSteppingAction::UserSteppingAction(const G4Step* step)
 72 {
 73   // DetectorConstruction instance
 74   const SAXSDetectorConstruction* detectorConstruction =
 75     static_cast<const SAXSDetectorConstruction*>(
 76       G4RunManager::GetRunManager()->GetUserDetectorConstruction());
 77 
 78   // get Phantom volume
 79   fPhantom = detectorConstruction->GetPhantom();
 80 
 81   // get pre and post step points
 82   G4StepPoint* preStepPoint = step->GetPreStepPoint();
 83   G4StepPoint* postStepPoint = step->GetPostStepPoint();
 84 
 85   // get the volume of the current step
 86   G4LogicalVolume* volume = preStepPoint->GetTouchableHandle()->GetVolume()->GetLogicalVolume();
 87 
 88   // get track and particle name
 89   G4Track* track = step->GetTrack();
 90   G4int ID = track->GetTrackID();
 91   G4String partName = track->GetDefinition()->GetParticleName();
 92 
 93   // update the primary particle (event) weight
 94   G4double PrimaryWeight = 1.;
 95   if (partName == "gamma" && ID == 1) {
 96     PrimaryWeight = track->GetWeight();
 97     fEventAction->UpdateEventWeight(PrimaryWeight);
 98   }
 99 
100   // if the particle is not a primary photon stepping in the phantom, exit!
101   if (volume != fPhantom || partName != "gamma" || ID != 1) return;
102 
103   // if it is a new event, reset variable values to 0
104   G4int eventNumber = G4RunManager::GetRunManager()->GetCurrentEvent()->GetEventID();
105   if (eventNumber != fEventNumber) {
106     fEventNumber = eventNumber;
107     fNSe = 0;
108   }
109 
110   // identify the process that occurred
111   G4String Process;
112   if (postStepPoint->GetProcessDefinedStep() != NULL) {
113     Process = postStepPoint->GetProcessDefinedStep()->GetProcessName();
114   }
115   else {
116     Process = "UserLimit";
117   }
118   // G4cout << "Process: " << Process << G4endl;
119   G4int ProcIndex = -1;
120   if (Process == "Transportation" || Process == "CoupledTransportation" || Process == "UserLimit") {
121     ProcIndex = 0;
122   }
123   if (Process == "Rayl" || Process == "biasWrapper(Rayl)") {
124     ProcIndex = 1;
125     fNSe++;
126     fEventAction->AddNRi();
127   }
128   if (Process == "compt" || Process == "biasWrapper(compt)") {
129     ProcIndex = 2;
130     fNSe++;
131     fEventAction->AddNCi();
132   }
133   if (Process == "phot" || Process == "biasWrapper(phot)") ProcIndex = 3;
134   if (Process == "conv" || Process == "biasWrapper(conv)") ProcIndex = 4;
135   if (Process == "photonNuclear" || Process == "biasWrapper(photonNuclear)") {
136     ProcIndex = 5;
137   }
138   if (Process == "PowderDiffraction" || Process == "biasWrapper(PowderDiffraction)") {
139     ProcIndex = 6;
140     fNSe++;
141     fEventAction->AddNDi();
142   }
143   // G4cout << "ProcIndex: " << ProcIndex << G4endl;
144 
145   // calculate the scattering angle
146   G4ThreeVector mom1 = preStepPoint->GetMomentumDirection();
147   G4ThreeVector mom2 = postStepPoint->GetMomentumDirection();
148   G4double theta = mom1.angle(mom2);
149 
150   // fill the Scattering ntuple
151   G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
152   if (theta > 1e-6) {  // record only if the angle is not 0
153     analysisManager->FillNtupleIColumn(1, 0, ProcIndex);
154     analysisManager->FillNtupleDColumn(1, 1, preStepPoint->GetKineticEnergy() / CLHEP::keV);
155     analysisManager->FillNtupleDColumn(1, 2, theta / CLHEP::deg);
156     analysisManager->FillNtupleDColumn(1, 3, track->GetWeight());
157     analysisManager->AddNtupleRow(1);
158   }
159 }
160 
161 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
162