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676fb573 | 1 | // $Id$ |
2 | // Category: event | |
3 | // | |
4 | // See the class description in the header file. | |
5 | ||
6 | #include "AliTrackingAction.h" | |
7 | #include "AliTrackingActionMessenger.h" | |
9bcb6317 | 8 | #include "AliSensitiveDetector.h" |
676fb573 | 9 | #include "AliRun.h" |
10 | #include "AliGlobals.h" | |
11 | #include "TG4StepManager.h" | |
12 | ||
13 | #include <G4TrackingManager.hh> | |
14 | #include <G4Track.hh> | |
15 | #include <G4Event.hh> | |
16 | #include <G4SDManager.hh> | |
9bcb6317 | 17 | #include <G4VSensitiveDetector.hh> |
676fb573 | 18 | #include <G4VHitsCollection.hh> |
19 | ||
71c03be6 | 20 | #include <TTree.h> |
676fb573 | 21 | #include <TParticle.h> |
22 | ||
23 | // static data members | |
24 | AliTrackingAction* AliTrackingAction::fgInstance = 0; | |
25 | ||
26 | // static methods | |
27 | AliTrackingAction* AliTrackingAction::Instance() { | |
28 | // | |
29 | return fgInstance; | |
30 | } | |
31 | ||
32 | AliTrackingAction::AliTrackingAction() | |
33 | : fParticles(0), | |
34 | fPrimaryTrackID(0), | |
35 | fVerboseLevel(2), | |
36 | fSavePrimaries(true), | |
37 | fPrimariesCounter(0), | |
38 | fParticlesCounter(0), | |
3bfabcfc | 39 | fTrackCounter(0), |
676fb573 | 40 | fLastParticleIndex(-1) |
41 | { | |
42 | // | |
43 | if (fgInstance) { | |
44 | AliGlobals::Exception("AliTrackingAction constructed twice."); | |
45 | } | |
46 | ||
47 | fMessenger = new AliTrackingActionMessenger(this); | |
48 | fgInstance = this; | |
49 | } | |
50 | ||
51 | AliTrackingAction::AliTrackingAction(const AliTrackingAction& right) { | |
52 | // | |
53 | AliGlobals::Exception("AliTrackingAction is protected from copying."); | |
54 | } | |
55 | ||
56 | AliTrackingAction::~AliTrackingAction() { | |
57 | // | |
58 | delete fMessenger; | |
59 | } | |
60 | ||
61 | // operators | |
62 | ||
63 | AliTrackingAction& | |
64 | AliTrackingAction::operator=(const AliTrackingAction &right) | |
65 | { | |
66 | // check assignement to self | |
67 | if (this == &right) return *this; | |
68 | ||
69 | AliGlobals::Exception("AliTrackingAction is protected from assigning."); | |
70 | ||
71 | return *this; | |
72 | } | |
73 | ||
74 | // public methods | |
75 | ||
76 | void AliTrackingAction::PrepareNewEvent() | |
77 | { | |
78 | // Called by G4 kernel at the beginning of event. | |
79 | // --- | |
80 | ||
3bfabcfc | 81 | fTrackCounter = 0; |
82 | ||
676fb573 | 83 | // aliroot |
84 | if (!fParticles) fParticles = gAlice->Particles(); | |
85 | ||
86 | // set the particles and primaries counter to the | |
87 | // number of tracks already stored in AliRun::fParticles | |
88 | // (fParticles can already contain primary particles | |
89 | // saved by AliGenerator) | |
90 | G4int nofTracks = gAlice->GetNtrack(); | |
91 | fPrimariesCounter = nofTracks; | |
92 | fParticlesCounter = nofTracks; | |
93 | fLastParticleIndex = nofTracks-1; | |
94 | ||
95 | // set g4 stepping manager pointer | |
96 | G4SteppingManager* pG4StepManager | |
97 | = fpTrackingManager->GetSteppingManager(); | |
98 | TG4StepManager* pStepManager = TG4StepManager::Instance(); | |
99 | pStepManager->SetSteppingManager(pG4StepManager); | |
100 | } | |
101 | ||
9bcb6317 | 102 | void AliTrackingAction::PreTrackingAction(const G4Track* aTrack) |
676fb573 | 103 | { |
104 | // Called by G4 kernel before starting tracking. | |
105 | // --- | |
106 | ||
107 | // aliroot | |
108 | // track index in the particles array | |
109 | G4int trackID = aTrack->GetTrackID(); | |
110 | G4int parentID = aTrack->GetParentID(); | |
111 | Int_t trackIndex; | |
112 | if (parentID==0) { | |
113 | trackIndex = trackID; | |
114 | } | |
115 | else { | |
116 | trackIndex = GetNofSavedTracks(); | |
117 | } | |
118 | ||
119 | // in AliRoot (from V3.0) track numbering starts from 0 | |
120 | gAlice->SetCurrentTrack(--trackIndex); | |
121 | ||
122 | if (parentID == 0) { | |
123 | // save primary track | |
124 | SaveAndDestroyTrack(); | |
125 | fPrimaryTrackID = aTrack->GetTrackID(); | |
126 | } | |
127 | else { | |
128 | // save secondary particles info | |
129 | // improve this later with retrieving the generation process | |
130 | // (primary particles are stored | |
131 | // by AlStackingAction in ClassifyNewTrack() method) | |
132 | G4String origin = "secondary"; | |
133 | SaveParticle(aTrack, origin); | |
9bcb6317 | 134 | } |
676fb573 | 135 | } |
136 | ||
9bcb6317 | 137 | void AliTrackingAction::PostTrackingAction(const G4Track* aTrack) |
676fb573 | 138 | { |
139 | // Called by G4 kernel after finishing tracking. | |
140 | // --- | |
141 | ||
3bfabcfc | 142 | fTrackCounter++; |
676fb573 | 143 | } |
144 | ||
145 | void AliTrackingAction::SaveAndDestroyTrack() | |
146 | { | |
147 | // Calls AliRun::PurifyKine and fills trees of hits | |
148 | // after finishing tracking of each primary track. | |
149 | // !! This method has to be also called from AlEventAction::EndOfEventAction() | |
150 | // for storing the last primary track of the current event. | |
151 | // --- | |
152 | ||
153 | if (fPrimaryTrackID>0) | |
154 | { | |
155 | if (fVerboseLevel == 3) { | |
5f1d09c5 | 156 | G4cout << "$$$ Primary track " << fPrimaryTrackID << G4endl; |
676fb573 | 157 | } |
158 | else if ( fVerboseLevel == 2 && fPrimaryTrackID % 10 == 0 ) { | |
5f1d09c5 | 159 | G4cout << "$$$ Primary track " << fPrimaryTrackID << G4endl; |
676fb573 | 160 | } |
161 | else if ( fVerboseLevel == 1 && fPrimaryTrackID % 100 == 0 ) { | |
5f1d09c5 | 162 | G4cout << "$$$ Primary track " << fPrimaryTrackID << G4endl; |
676fb573 | 163 | } |
164 | ||
165 | // aliroot | |
166 | G4int lastSavedTrack | |
167 | = gAlice->PurifyKine(fLastParticleIndex, fParticlesCounter); | |
168 | G4int nofPuredSavedTracks | |
169 | = gAlice->GetNtrack(); | |
170 | fLastParticleIndex = lastSavedTrack; | |
171 | fParticlesCounter = nofPuredSavedTracks; | |
172 | ||
173 | if(gAlice->TreeH()) gAlice->TreeH()->Fill(); | |
174 | gAlice->ResetHits(); | |
175 | } | |
176 | else { | |
177 | fLastParticleIndex = fPrimariesCounter-1; | |
178 | } | |
179 | fPrimaryTrackID = 0; | |
180 | } | |
181 | ||
182 | void AliTrackingAction::SaveParticle(const G4Track* track, | |
183 | G4String processName) | |
184 | { | |
185 | // Converts G4track to TParticle and saves it in AliRun::fParticles | |
186 | // array. | |
187 | // ---- | |
188 | ||
189 | fParticlesCounter++; | |
190 | ||
191 | // track history | |
192 | G4int firstDaughter = -1; | |
193 | G4int lastDaughter = -1; | |
194 | G4int parentID = track->GetParentID(); | |
195 | G4int motherIndex1; | |
196 | G4int motherIndex2 = -1; | |
197 | if (parentID == 0) { | |
198 | motherIndex1 = -1; | |
199 | fPrimariesCounter++; | |
200 | } | |
201 | else { | |
202 | // set first/last child for already defined particles | |
203 | motherIndex1 = GetParticleIndex(parentID); | |
204 | // aliroot | |
205 | TParticle* parent | |
206 | = dynamic_cast<TParticle*>(fParticles->UncheckedAt(motherIndex1)); | |
207 | if (parent) { | |
208 | if (parent->GetFirstDaughter()<0) | |
209 | parent->SetFirstDaughter(fParticlesCounter); | |
210 | parent->SetLastDaughter(fParticlesCounter); | |
211 | } | |
212 | else { | |
213 | AliGlobals::Exception( | |
214 | "AliTrackingAction::SaveParticle: Unknown particle type"); | |
215 | } | |
216 | }; | |
217 | ||
218 | // ?? status of particle | |
219 | // temporarily used for storing trackID from G4 | |
220 | G4int ks = track->GetTrackID(); | |
221 | ||
222 | // particle type | |
223 | // is this G3 ekvivalent ?? - check | |
224 | G4int pdg = track->GetDefinition()->GetPDGEncoding(); | |
225 | ||
226 | // track kinematics | |
227 | G4ThreeVector momentum = track->GetMomentum(); | |
228 | G4double px = momentum.x()/GeV; | |
229 | G4double py = momentum.y()/GeV; | |
230 | G4double pz = momentum.z()/GeV; | |
231 | G4double e = track->GetTotalEnergy()/GeV; | |
232 | ||
233 | G4ThreeVector position = track->GetPosition(); | |
234 | G4double vx = position.x()/cm; | |
235 | G4double vy = position.y()/cm; | |
236 | G4double vz = position.z()/cm; | |
237 | // time of production - check if ekvivalent with G4 | |
238 | G4double t = track->GetGlobalTime(); | |
239 | ||
240 | G4ThreeVector polarization = track->GetPolarization(); | |
241 | G4double polX = polarization.x(); | |
242 | G4double polY = polarization.y(); | |
243 | G4double polZ = polarization.z(); | |
244 | ||
245 | // aliroot | |
246 | TClonesArray& theCollectionRef = *fParticles; | |
247 | G4int nofParticles = theCollectionRef.GetEntriesFast(); | |
248 | TParticle* particle | |
249 | = new(theCollectionRef[nofParticles]) | |
250 | TParticle(pdg, ks, motherIndex1, motherIndex1, | |
251 | firstDaughter, lastDaughter, px, py, pz, e, vx, vy, vz, t); | |
252 | particle->SetPolarisation(polX, polY, polZ); | |
b65f8990 | 253 | particle->SetBit(kKeepBit, false); |
676fb573 | 254 | } |
255 | ||
256 | G4int AliTrackingAction::GetParticleIndex(G4int trackID) | |
257 | { | |
258 | // Converts the trackID into the index of the particle | |
259 | // in AliRun::fParticles array. | |
260 | // --- | |
261 | ||
262 | if (trackID <= fPrimariesCounter) { | |
263 | return trackID-1; | |
264 | } | |
265 | else | |
266 | for (G4int i=fLastParticleIndex+1; i<fParticlesCounter; i++) { | |
267 | // aliroot | |
268 | TParticle* particle | |
269 | = (TParticle*)fParticles->UncheckedAt(i); | |
270 | if (trackID == particle->GetStatusCode()) return i; | |
271 | } | |
272 | ||
273 | AliGlobals::Exception("AliTrackingAction::GetParticleIndex() has failed."); | |
274 | return 0; | |
275 | } |