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8d0843c6 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
3d1463c8 | 18 | //----------------------------------------------------------------------------- |
c4ee792d | 19 | /// \class AliMUONVTrackReconstructor |
06ca6d7b | 20 | /// Virtual MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) |
21 | /// | |
96ebe67e | 22 | /// This class contains as data a pointer to the array of reconstructed tracks |
06ca6d7b | 23 | /// |
24 | /// It contains as methods, among others: | |
25 | /// * EventReconstruct to build the muon tracks | |
26 | /// * EventReconstructTrigger to build the trigger tracks | |
96ebe67e | 27 | /// * ValidateTracksWithTrigger to match tracker/trigger tracks |
06ca6d7b | 28 | /// |
96ebe67e | 29 | /// Several options and adjustable parameters are available for both KALMAN and ORIGINAL |
ad3c6eda | 30 | /// tracking algorithms. They can be changed through the AliMUONRecoParam object |
31 | /// set in the reconstruction macro or read from the CDB | |
32 | /// (see methods in AliMUONRecoParam.h file for details) | |
96ebe67e | 33 | /// |
34 | /// Main parameters and options are: | |
dfb547bf | 35 | /// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be |
36 | /// attached to the track candidate and to select good tracks. | |
019df241 | 37 | /// - *fgkMakeTrackCandidatesFast* : if this flag is set to 'true', the track candidates |
38 | /// are made assuming linear propagation between stations 4 and 5. | |
dfb547bf | 39 | /// - *fgkTrackAllTracks* : according to the value of this flag, in case that several |
40 | /// new clusters pass the quality cut, either we consider all the possibilities | |
41 | /// (duplicating tracks) or we attach only the best cluster. | |
42 | /// - *fgkRecoverTracks* : if this flag is set to 'true', we try to recover the tracks | |
43 | /// lost during the tracking by removing the worst of the 2 clusters attached in the | |
44 | /// previous station. | |
45 | /// - *fgkImproveTracks* : if this flag is set to 'true', we try to improve the quality | |
46 | /// of the tracks at the end of the tracking by removing clusters that do not pass | |
3304fa09 | 47 | /// new quality cut (the track is removed is it does not contain enough cluster anymore). |
48 | /// - *fgkComplementTracks* : if this flag is set to 'true', we try to improve the quality | |
49 | /// of the tracks at the end of the tracking by adding potentially missing clusters | |
50 | /// (we may have 2 clusters in the same chamber because of the overlapping of detection | |
51 | /// elements, which is not handle by the tracking algorithm). | |
dfb547bf | 52 | /// - *fgkSigmaToCutForImprovement* : quality cut used when we try to improve the |
53 | /// quality of the tracks. | |
54 | /// | |
c4ee792d | 55 | /// \author Philippe Pillot |
3d1463c8 | 56 | //----------------------------------------------------------------------------- |
8d0843c6 | 57 | |
8d0843c6 | 58 | #include "AliMUONVTrackReconstructor.h" |
7ec3b9cf | 59 | |
8d0843c6 | 60 | #include "AliMUONConstants.h" |
208f139e | 61 | #include "AliMUONObjectPair.h" |
8d0843c6 | 62 | #include "AliMUONTriggerTrack.h" |
e1a10d41 | 63 | #include "AliMUONTriggerCircuit.h" |
8d0843c6 | 64 | #include "AliMUONLocalTrigger.h" |
65 | #include "AliMUONGlobalTrigger.h" | |
8d0843c6 | 66 | #include "AliMUONTrack.h" |
37827b29 | 67 | #include "AliMUONTrackParam.h" |
68 | #include "AliMUONTrackExtrap.h" | |
7771752e | 69 | #include "AliMUONTrackHitPattern.h" |
7ec3b9cf | 70 | #include "AliMUONVTrackStore.h" |
71 | #include "AliMUONVClusterStore.h" | |
2060b217 | 72 | #include "AliMUONVCluster.h" |
1fef78c8 | 73 | #include "AliMUONVClusterServer.h" |
7ec3b9cf | 74 | #include "AliMUONVTriggerStore.h" |
75 | #include "AliMUONVTriggerTrackStore.h" | |
5a240757 | 76 | #include "AliMUONRecoParam.h" |
77 | ||
ea94c18b | 78 | #include "AliMpDEManager.h" |
1fef78c8 | 79 | #include "AliMpArea.h" |
ea94c18b | 80 | |
81 | #include "AliLog.h" | |
b709ac13 | 82 | #include "AliCodeTimer.h" |
ea94c18b | 83 | #include "AliTracker.h" |
8d0843c6 | 84 | |
4889d34c | 85 | #include <TClonesArray.h> |
86 | #include <TMath.h> | |
ea94c18b | 87 | #include <TMatrixD.h> |
1fef78c8 | 88 | #include <TVector2.h> |
ea94c18b | 89 | |
90 | #include <Riostream.h> | |
4889d34c | 91 | |
78649106 | 92 | /// \cond CLASSIMP |
8d0843c6 | 93 | ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context |
78649106 | 94 | /// \endcond |
8d0843c6 | 95 | |
ea94c18b | 96 | //__________________________________________________________________________ |
a0dc65b4 | 97 | AliMUONVTrackReconstructor::AliMUONVTrackReconstructor(const AliMUONRecoParam* recoParam, |
98 | AliMUONVClusterServer* clusterServer) | |
99 | : TObject(), | |
100 | fRecTracksPtr(0x0), | |
101 | fNRecTracks(0), | |
102 | fClusterServer(clusterServer), | |
6b191dea | 103 | fkRecoParam(recoParam), |
4663da9f | 104 | fMaxMCSAngle2(0x0) |
8d0843c6 | 105 | { |
106 | /// Constructor for class AliMUONVTrackReconstructor | |
b1fea02e | 107 | /// WARNING: if clusterServer=0x0, no clusterization will be possible at this level |
ea94c18b | 108 | |
109 | // Memory allocation for the TClonesArray of reconstructed tracks | |
96ebe67e | 110 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 100); |
7ec3b9cf | 111 | |
208f139e | 112 | // set the magnetic field for track extrapolations |
f7a1cc68 | 113 | AliMUONTrackExtrap::SetField(); |
6b191dea | 114 | |
115 | // set the maximum MCS angle in chamber from the minimum acceptable momentum | |
116 | AliMUONTrackParam param; | |
117 | Double_t inverseBendingP = (GetRecoParam()->GetMinBendingMomentum() > 0.) ? 1./GetRecoParam()->GetMinBendingMomentum() : 1.; | |
118 | param.SetInverseBendingMomentum(inverseBendingP); | |
4663da9f | 119 | fMaxMCSAngle2 = new Double_t [AliMUONConstants::NTrackingCh()]; |
120 | for (Int_t iCh=0; iCh<AliMUONConstants::NTrackingCh(); iCh++) | |
121 | fMaxMCSAngle2[iCh] = AliMUONTrackExtrap::GetMCSAngle2(param, AliMUONConstants::ChamberThicknessInX0(iCh), 1.); | |
6b191dea | 122 | |
8d0843c6 | 123 | } |
124 | ||
125 | //__________________________________________________________________________ | |
ea94c18b | 126 | AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor() |
8d0843c6 | 127 | { |
128 | /// Destructor for class AliMUONVTrackReconstructor | |
ea94c18b | 129 | delete fRecTracksPtr; |
4663da9f | 130 | delete[] fMaxMCSAngle2; |
8d0843c6 | 131 | } |
132 | ||
ea94c18b | 133 | //__________________________________________________________________________ |
134 | void AliMUONVTrackReconstructor::ResetTracks() | |
135 | { | |
136 | /// To reset the TClonesArray of reconstructed tracks | |
137 | if (fRecTracksPtr) fRecTracksPtr->Clear("C"); | |
138 | fNRecTracks = 0; | |
139 | return; | |
140 | } | |
141 | ||
142 | //__________________________________________________________________________ | |
1fef78c8 | 143 | void AliMUONVTrackReconstructor::EventReconstruct(AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore) |
ea94c18b | 144 | { |
145 | /// To reconstruct one event | |
146 | AliDebug(1,""); | |
99c136e1 | 147 | AliCodeTimerAuto("",0); |
ea94c18b | 148 | |
96ebe67e | 149 | // Reset array of tracks |
ea94c18b | 150 | ResetTracks(); |
2060b217 | 151 | |
89c8d66d | 152 | // Look for candidates from clusters in stations(1..) 4 and 5 (abort in case of failure) |
153 | if (!MakeTrackCandidates(clusterStore)) return; | |
96ebe67e | 154 | |
89c8d66d | 155 | // Look for extra candidates from clusters in stations(1..) 4 and 5 (abort in case of failure) |
156 | if (GetRecoParam()->MakeMoreTrackCandidates()) { | |
157 | if (!MakeMoreTrackCandidates(clusterStore)) return; | |
158 | } | |
9bf6860b | 159 | |
96ebe67e | 160 | // Stop tracking if no candidate found |
ea94c18b | 161 | if (fRecTracksPtr->GetEntriesFast() == 0) return; |
96ebe67e | 162 | |
89c8d66d | 163 | // Follow tracks in stations(1..) 3, 2 and 1 (abort in case of failure) |
164 | if (!FollowTracks(clusterStore)) return; | |
96ebe67e | 165 | |
b709ac13 | 166 | // Complement the reconstructed tracks |
89c8d66d | 167 | if (GetRecoParam()->ComplementTracks()) { |
168 | if (ComplementTracks(clusterStore)) RemoveIdenticalTracks(); | |
169 | } | |
96ebe67e | 170 | |
ea94c18b | 171 | // Improve the reconstructed tracks |
a0dc65b4 | 172 | if (GetRecoParam()->ImproveTracks()) ImproveTracks(); |
96ebe67e | 173 | |
c59f70b9 | 174 | // Remove connected tracks |
175 | if (GetRecoParam()->RemoveConnectedTracksInSt12()) RemoveConnectedTracks(kFALSE); | |
176 | else RemoveConnectedTracks(kTRUE); | |
96ebe67e | 177 | |
ea94c18b | 178 | // Fill AliMUONTrack data members |
179 | Finalize(); | |
96ebe67e | 180 | |
181 | // Add tracks to MUON data container | |
182 | for (Int_t i=0; i<fNRecTracks; ++i) | |
183 | { | |
184 | AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i); | |
4ea3f013 | 185 | if (track->GetGlobalChi2() < AliMUONTrack::MaxChi2()) { |
186 | track->SetUniqueID(i+1); | |
187 | trackStore.Add(*track); | |
188 | } else AliWarning("problem occur somewhere during track refitting --> discard track"); | |
96ebe67e | 189 | } |
ea94c18b | 190 | } |
191 | ||
6b191dea | 192 | //__________________________________________________________________________ |
193 | Bool_t AliMUONVTrackReconstructor::IsAcceptable(AliMUONTrackParam &trackParam) | |
194 | { | |
195 | /// Return kTRUE if the track is within given limits on momentum/angle/origin | |
196 | ||
197 | const TMatrixD& kParamCov = trackParam.GetCovariances(); | |
198 | Int_t chamber = trackParam.GetClusterPtr()->GetChamberId(); | |
199 | Double_t z = trackParam.GetZ(); | |
200 | Double_t sigmaCut = GetRecoParam()->GetSigmaCutForTracking(); | |
201 | ||
202 | // MCS dipersion | |
203 | Double_t angleMCS2 = 0.; | |
6b191dea | 204 | Double_t impactMCS2 = 0.; |
4663da9f | 205 | if (AliMUONTrackExtrap::IsFieldON() && chamber < 6) { |
206 | ||
207 | // track momentum is known | |
208 | for (Int_t iCh=0; iCh<=chamber; iCh++) { | |
209 | Double_t localMCS2 = AliMUONTrackExtrap::GetMCSAngle2(trackParam, AliMUONConstants::ChamberThicknessInX0(iCh), 1.); | |
210 | angleMCS2 += localMCS2; | |
211 | impactMCS2 += AliMUONConstants::DefaultChamberZ(chamber) * AliMUONConstants::DefaultChamberZ(chamber) * localMCS2; | |
212 | } | |
213 | ||
214 | } else { | |
215 | ||
216 | // track momentum is unknown | |
217 | for (Int_t iCh=0; iCh<=chamber; iCh++) { | |
218 | angleMCS2 += fMaxMCSAngle2[iCh]; | |
219 | impactMCS2 += AliMUONConstants::DefaultChamberZ(chamber) * AliMUONConstants::DefaultChamberZ(chamber) * fMaxMCSAngle2[iCh]; | |
220 | } | |
221 | ||
222 | } | |
6b191dea | 223 | |
224 | // ------ track selection in non bending direction ------ | |
225 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
226 | ||
227 | // check if non bending slope is within tolerances | |
4663da9f | 228 | Double_t nonBendingSlopeErr = TMath::Sqrt(kParamCov(1,1) + angleMCS2); |
6b191dea | 229 | if ((TMath::Abs(trackParam.GetNonBendingSlope()) - sigmaCut * nonBendingSlopeErr) > GetRecoParam()->GetMaxNonBendingSlope()) return kFALSE; |
230 | ||
231 | } else { | |
232 | ||
233 | // or check if non bending impact parameter is within tolerances | |
234 | Double_t nonBendingImpactParam = TMath::Abs(trackParam.GetNonBendingCoor() - z * trackParam.GetNonBendingSlope()); | |
235 | Double_t nonBendingImpactParamErr = TMath::Sqrt(kParamCov(0,0) + z * z * kParamCov(1,1) - 2. * z * kParamCov(0,1) + impactMCS2); | |
236 | if ((nonBendingImpactParam - sigmaCut * nonBendingImpactParamErr) > (3. * GetRecoParam()->GetNonBendingVertexDispersion())) return kFALSE; | |
237 | ||
238 | } | |
239 | ||
240 | // ------ track selection in bending direction ------ | |
241 | if (AliMUONTrackExtrap::IsFieldON()) { // depending whether the field is ON or OFF | |
242 | ||
243 | // check if bending momentum is within tolerances | |
244 | Double_t bendingMomentum = TMath::Abs(1. / trackParam.GetInverseBendingMomentum()); | |
245 | Double_t bendingMomentumErr = TMath::Sqrt(kParamCov(4,4)) * bendingMomentum * bendingMomentum; | |
246 | if (chamber < 6 && (bendingMomentum + sigmaCut * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) return kFALSE; | |
247 | else if ((bendingMomentum + 3. * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) return kFALSE; | |
248 | ||
249 | } else { | |
250 | ||
251 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
252 | ||
253 | // check if bending slope is within tolerances | |
4663da9f | 254 | Double_t bendingSlopeErr = TMath::Sqrt(kParamCov(3,3) + angleMCS2); |
6b191dea | 255 | if ((TMath::Abs(trackParam.GetBendingSlope()) - sigmaCut * bendingSlopeErr) > GetRecoParam()->GetMaxBendingSlope()) return kFALSE; |
256 | ||
257 | } else { | |
258 | ||
259 | // or check if bending impact parameter is within tolerances | |
260 | Double_t bendingImpactParam = TMath::Abs(trackParam.GetBendingCoor() - z * trackParam.GetBendingSlope()); | |
261 | Double_t bendingImpactParamErr = TMath::Sqrt(kParamCov(2,2) + z * z * kParamCov(3,3) - 2. * z * kParamCov(2,3) + impactMCS2); | |
262 | if ((bendingImpactParam - sigmaCut * bendingImpactParamErr) > (3. * GetRecoParam()->GetBendingVertexDispersion())) return kFALSE; | |
263 | ||
264 | } | |
265 | ||
266 | } | |
267 | ||
268 | return kTRUE; | |
269 | ||
270 | } | |
271 | ||
272 | //__________________________________________________________________________ | |
9bf6860b | 273 | TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsBetweenChambers(const AliMUONVClusterStore& clusterStore, Int_t ch1, Int_t ch2) |
8d0843c6 | 274 | { |
9bf6860b | 275 | /// To make the list of segments from the list of clusters in the 2 given chambers. |
208f139e | 276 | /// Return a new TClonesArray of segments. |
277 | /// It is the responsibility of the user to delete it afterward. | |
9bf6860b | 278 | AliDebug(1,Form("Enter MakeSegmentsBetweenChambers (1..) %d-%d", ch1+1, ch2+1)); |
99c136e1 | 279 | AliCodeTimerAuto("",0); |
208f139e | 280 | |
96ebe67e | 281 | AliMUONVCluster *cluster1, *cluster2; |
208f139e | 282 | AliMUONObjectPair *segment; |
6b191dea | 283 | Double_t z1 = 0., z2 = 0., dZ = 0.; |
284 | Double_t nonBendingSlope = 0., nonBendingSlopeErr = 0., nonBendingImpactParam = 0., nonBendingImpactParamErr = 0.; | |
285 | Double_t bendingSlope = 0., bendingSlopeErr = 0., bendingImpactParam = 0., bendingImpactParamErr = 0., bendingImpactParamErr2 = 0.; | |
286 | Double_t bendingMomentum = 0., bendingMomentumErr = 0.; | |
287 | Double_t bendingVertexDispersion2 = GetRecoParam()->GetBendingVertexDispersion() * GetRecoParam()->GetBendingVertexDispersion(); | |
4663da9f | 288 | Double_t angleMCS2 = 0.; // maximum angular dispersion**2 due to MCS in chamber |
289 | Double_t impactMCS2 = 0.; // maximum impact parameter dispersion**2 due to MCS in chamber | |
290 | for (Int_t iCh=0; iCh<=ch1; iCh++) { | |
291 | angleMCS2 += fMaxMCSAngle2[iCh]; | |
292 | impactMCS2 += AliMUONConstants::DefaultChamberZ(iCh) * AliMUONConstants::DefaultChamberZ(iCh) * fMaxMCSAngle2[iCh]; | |
293 | } | |
6b191dea | 294 | Double_t sigmaCut = GetRecoParam()->GetSigmaCutForTracking(); |
7ec3b9cf | 295 | |
96ebe67e | 296 | // Create iterators to loop over clusters in both chambers |
297 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
298 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
299 | ||
208f139e | 300 | // list of segments |
96ebe67e | 301 | TClonesArray *segments = new TClonesArray("AliMUONObjectPair", 100); |
7ec3b9cf | 302 | |
96ebe67e | 303 | // Loop over clusters in the first chamber of the station |
304 | while ( ( cluster1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
6b191dea | 305 | z1 = cluster1->GetZ(); |
96ebe67e | 306 | |
307 | // reset cluster iterator of chamber 2 | |
308 | nextInCh2.Reset(); | |
309 | ||
310 | // Loop over clusters in the second chamber of the station | |
311 | while ( ( cluster2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
6b191dea | 312 | z2 = cluster2->GetZ(); |
313 | dZ = z1 - z2; | |
96ebe67e | 314 | |
6b191dea | 315 | // ------ track selection in non bending direction ------ |
316 | nonBendingSlope = (cluster1->GetX() - cluster2->GetX()) / dZ; | |
317 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
9f093251 | 318 | |
6b191dea | 319 | // check if non bending slope is within tolerances |
4663da9f | 320 | nonBendingSlopeErr = TMath::Sqrt((cluster1->GetErrX2() + cluster2->GetErrX2()) / dZ / dZ + angleMCS2); |
6b191dea | 321 | if ((TMath::Abs(nonBendingSlope) - sigmaCut * nonBendingSlopeErr) > GetRecoParam()->GetMaxNonBendingSlope()) continue; |
9f093251 | 322 | |
6b191dea | 323 | } else { |
324 | ||
325 | // or check if non bending impact parameter is within tolerances | |
326 | nonBendingImpactParam = TMath::Abs(cluster1->GetX() - cluster1->GetZ() * nonBendingSlope); | |
327 | nonBendingImpactParamErr = TMath::Sqrt((z1 * z1 * cluster2->GetErrX2() + z2 * z2 * cluster1->GetErrX2()) / dZ / dZ + impactMCS2); | |
328 | if ((nonBendingImpactParam - sigmaCut * nonBendingImpactParamErr) > (3. * GetRecoParam()->GetNonBendingVertexDispersion())) continue; | |
329 | ||
330 | } | |
331 | ||
332 | // ------ track selection in bending direction ------ | |
333 | bendingSlope = (cluster1->GetY() - cluster2->GetY()) / dZ; | |
334 | if (AliMUONTrackExtrap::IsFieldON()) { // depending whether the field is ON or OFF | |
9f093251 | 335 | |
336 | // check if bending momentum is within tolerances | |
6b191dea | 337 | bendingImpactParam = cluster1->GetY() - cluster1->GetZ() * bendingSlope; |
338 | bendingImpactParamErr2 = (z1 * z1 * cluster2->GetErrY2() + z2 * z2 * cluster1->GetErrY2()) / dZ / dZ + impactMCS2; | |
339 | bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(bendingImpactParam)); | |
340 | bendingMomentumErr = TMath::Sqrt((bendingVertexDispersion2 + bendingImpactParamErr2) / | |
341 | bendingImpactParam / bendingImpactParam + 0.01) * bendingMomentum; | |
342 | if ((bendingMomentum + 3. * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) continue; | |
96ebe67e | 343 | |
9f093251 | 344 | } else { |
345 | ||
6b191dea | 346 | if (GetRecoParam()->SelectOnTrackSlope()) { |
347 | ||
348 | // check if bending slope is within tolerances | |
4663da9f | 349 | bendingSlopeErr = TMath::Sqrt((cluster1->GetErrY2() + cluster2->GetErrY2()) / dZ / dZ + angleMCS2); |
6b191dea | 350 | if ((TMath::Abs(bendingSlope) - sigmaCut * bendingSlopeErr) > GetRecoParam()->GetMaxBendingSlope()) continue; |
351 | ||
352 | } else { | |
353 | ||
354 | // or check if bending impact parameter is within tolerances | |
355 | bendingImpactParam = TMath::Abs(cluster1->GetY() - cluster1->GetZ() * bendingSlope); | |
356 | bendingImpactParamErr = TMath::Sqrt((z1 * z1 * cluster2->GetErrY2() + z2 * z2 * cluster1->GetErrY2()) / dZ / dZ + impactMCS2); | |
357 | if ((bendingImpactParam - sigmaCut * bendingImpactParamErr) > (3. * GetRecoParam()->GetBendingVertexDispersion())) continue; | |
358 | ||
359 | } | |
360 | ||
9f093251 | 361 | } |
6b191dea | 362 | |
9f093251 | 363 | // make new segment |
364 | segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(cluster1, cluster2, kFALSE, kFALSE); | |
365 | ||
366 | // Printout for debug | |
367 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
368 | cout << "segmentIndex(0...): " << segments->GetLast() << endl; | |
369 | segment->Dump(); | |
370 | cout << "Cluster in first chamber" << endl; | |
371 | cluster1->Print(); | |
372 | cout << "Cluster in second chamber" << endl; | |
373 | cluster2->Print(); | |
8d0843c6 | 374 | } |
96ebe67e | 375 | |
376 | } | |
377 | ||
378 | } | |
379 | ||
380 | // Printout for debug | |
9bf6860b | 381 | AliDebug(1,Form("chambers%d-%d: NSegments = %d ", ch1+1, ch2+1, segments->GetEntriesFast())); |
96ebe67e | 382 | |
208f139e | 383 | return segments; |
8d0843c6 | 384 | } |
385 | ||
89c8d66d | 386 | //__________________________________________________________________________ |
387 | void AliMUONVTrackReconstructor::RemoveUsedSegments(TClonesArray& segments) | |
388 | { | |
389 | /// To remove pairs of clusters already attached to a track | |
390 | AliDebug(1,"Enter RemoveUsedSegments"); | |
391 | Int_t nSegments = segments.GetEntriesFast(); | |
392 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
393 | AliMUONObjectPair *segment; | |
394 | AliMUONTrack *track; | |
395 | AliMUONVCluster *cluster, *cluster1, *cluster2; | |
396 | Bool_t foundCluster1, foundCluster2, removeSegment; | |
397 | ||
398 | // Loop over segments | |
399 | for (Int_t iSegment=0; iSegment<nSegments; iSegment++) { | |
400 | segment = (AliMUONObjectPair*) segments.UncheckedAt(iSegment); | |
401 | ||
402 | cluster1 = (AliMUONVCluster*) segment->First(); | |
403 | cluster2 = (AliMUONVCluster*) segment->Second(); | |
404 | removeSegment = kFALSE; | |
405 | ||
406 | // Loop over tracks | |
407 | for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) { | |
408 | track = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack); | |
409 | ||
410 | // skip empty slot | |
411 | if (!track) continue; | |
412 | ||
413 | foundCluster1 = kFALSE; | |
414 | foundCluster2 = kFALSE; | |
415 | ||
416 | // Loop over clusters | |
417 | Int_t nClusters = track->GetNClusters(); | |
418 | for (Int_t iCluster = 0; iCluster < nClusters; iCluster++) { | |
419 | cluster = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iCluster))->GetClusterPtr(); | |
420 | ||
421 | // check if both clusters are in that track | |
422 | if (cluster == cluster1) foundCluster1 = kTRUE; | |
423 | else if (cluster == cluster2) foundCluster2 = kTRUE; | |
424 | ||
425 | if (foundCluster1 && foundCluster2) { | |
426 | removeSegment = kTRUE; | |
427 | break; | |
428 | } | |
429 | ||
430 | } | |
431 | ||
432 | if (removeSegment) break; | |
433 | ||
434 | } | |
435 | ||
436 | if (removeSegment) segments.RemoveAt(iSegment); | |
437 | ||
438 | } | |
439 | ||
440 | segments.Compress(); | |
441 | ||
442 | // Printout for debug | |
443 | AliDebug(1,Form("NSegments = %d ", segments.GetEntriesFast())); | |
444 | } | |
445 | ||
ea94c18b | 446 | //__________________________________________________________________________ |
447 | void AliMUONVTrackReconstructor::RemoveIdenticalTracks() | |
448 | { | |
449 | /// To remove identical tracks: | |
96ebe67e | 450 | /// Tracks are considered identical if they have all their clusters in common. |
451 | /// One keeps the track with the larger number of clusters if need be | |
89c8d66d | 452 | AliMUONTrack *track1, *track2; |
453 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
96ebe67e | 454 | Int_t clustersInCommon, nClusters1, nClusters2; |
ea94c18b | 455 | // Loop over first track of the pair |
89c8d66d | 456 | for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) { |
457 | track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1); | |
458 | // skip empty slot | |
459 | if (!track1) continue; | |
96ebe67e | 460 | nClusters1 = track1->GetNClusters(); |
ea94c18b | 461 | // Loop over second track of the pair |
89c8d66d | 462 | for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) { |
463 | track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2); | |
464 | // skip empty slot | |
465 | if (!track2) continue; | |
96ebe67e | 466 | nClusters2 = track2->GetNClusters(); |
467 | // number of clusters in common between two tracks | |
468 | clustersInCommon = track1->ClustersInCommon(track2); | |
ea94c18b | 469 | // check for identical tracks |
96ebe67e | 470 | if ((clustersInCommon == nClusters1) || (clustersInCommon == nClusters2)) { |
ea94c18b | 471 | // decide which track to remove |
96ebe67e | 472 | if (nClusters2 > nClusters1) { |
ea94c18b | 473 | // remove track1 and continue the first loop with the track next to track1 |
89c8d66d | 474 | fRecTracksPtr->RemoveAt(iTrack1); |
ea94c18b | 475 | fNRecTracks--; |
ea94c18b | 476 | break; |
477 | } else { | |
478 | // remove track2 and continue the second loop with the track next to track2 | |
89c8d66d | 479 | fRecTracksPtr->RemoveAt(iTrack2); |
ea94c18b | 480 | fNRecTracks--; |
481 | } | |
89c8d66d | 482 | } |
ea94c18b | 483 | } // track2 |
ea94c18b | 484 | } // track1 |
89c8d66d | 485 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards |
ea94c18b | 486 | } |
487 | ||
488 | //__________________________________________________________________________ | |
489 | void AliMUONVTrackReconstructor::RemoveDoubleTracks() | |
490 | { | |
491 | /// To remove double tracks: | |
96ebe67e | 492 | /// Tracks are considered identical if more than half of the clusters of the track |
493 | /// which has the smaller number of clusters are in common with the other track. | |
494 | /// Among two identical tracks, one keeps the track with the larger number of clusters | |
ea94c18b | 495 | /// or, if these numbers are equal, the track with the minimum chi2. |
89c8d66d | 496 | AliMUONTrack *track1, *track2; |
497 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
498 | Int_t clustersInCommon2, nClusters1, nClusters2; | |
ea94c18b | 499 | // Loop over first track of the pair |
89c8d66d | 500 | for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) { |
501 | track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1); | |
502 | // skip empty slot | |
503 | if (!track1) continue; | |
96ebe67e | 504 | nClusters1 = track1->GetNClusters(); |
ea94c18b | 505 | // Loop over second track of the pair |
89c8d66d | 506 | for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) { |
507 | track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2); | |
508 | // skip empty slot | |
509 | if (!track2) continue; | |
96ebe67e | 510 | nClusters2 = track2->GetNClusters(); |
511 | // number of clusters in common between two tracks | |
89c8d66d | 512 | clustersInCommon2 = 2 * track1->ClustersInCommon(track2); |
ea94c18b | 513 | // check for identical tracks |
89c8d66d | 514 | if (clustersInCommon2 > nClusters1 || clustersInCommon2 > nClusters2) { |
ea94c18b | 515 | // decide which track to remove |
96ebe67e | 516 | if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) { |
ea94c18b | 517 | // remove track2 and continue the second loop with the track next to track2 |
89c8d66d | 518 | fRecTracksPtr->RemoveAt(iTrack2); |
c59f70b9 | 519 | fNRecTracks--; |
520 | } else { | |
521 | // else remove track1 and continue the first loop with the track next to track1 | |
89c8d66d | 522 | fRecTracksPtr->RemoveAt(iTrack1); |
c59f70b9 | 523 | fNRecTracks--; |
c59f70b9 | 524 | break; |
525 | } | |
89c8d66d | 526 | } |
c59f70b9 | 527 | } // track2 |
c59f70b9 | 528 | } // track1 |
89c8d66d | 529 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards |
c59f70b9 | 530 | } |
531 | ||
532 | //__________________________________________________________________________ | |
533 | void AliMUONVTrackReconstructor::RemoveConnectedTracks(Bool_t inSt345) | |
534 | { | |
535 | /// To remove double tracks: | |
536 | /// Tracks are considered identical if they share 1 cluster or more. | |
537 | /// If inSt345=kTRUE only stations 3, 4 and 5 are considered. | |
538 | /// Among two identical tracks, one keeps the track with the larger number of clusters | |
539 | /// or, if these numbers are equal, the track with the minimum chi2. | |
540 | AliMUONTrack *track1, *track2, *trackToRemove; | |
541 | Int_t clustersInCommon, nClusters1, nClusters2; | |
542 | Bool_t removedTrack1; | |
543 | // Loop over first track of the pair | |
544 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
545 | while (track1) { | |
546 | removedTrack1 = kFALSE; | |
547 | nClusters1 = track1->GetNClusters(); | |
548 | // Loop over second track of the pair | |
549 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
550 | while (track2) { | |
551 | nClusters2 = track2->GetNClusters(); | |
552 | // number of clusters in common between two tracks | |
89c8d66d | 553 | if (inSt345) clustersInCommon = track1->ClustersInCommonInSt345(track2); |
554 | else clustersInCommon = track1->ClustersInCommon(track2); | |
c59f70b9 | 555 | // check for identical tracks |
556 | if (clustersInCommon > 0) { | |
557 | // decide which track to remove | |
558 | if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) { | |
559 | // remove track2 and continue the second loop with the track next to track2 | |
560 | trackToRemove = track2; | |
561 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
562 | fRecTracksPtr->Remove(trackToRemove); | |
ea94c18b | 563 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards |
564 | fNRecTracks--; | |
565 | } else { | |
566 | // else remove track1 and continue the first loop with the track next to track1 | |
567 | trackToRemove = track1; | |
568 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
569 | fRecTracksPtr->Remove(trackToRemove); | |
570 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
571 | fNRecTracks--; | |
572 | removedTrack1 = kTRUE; | |
573 | break; | |
574 | } | |
575 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
576 | } // track2 | |
577 | if (removedTrack1) continue; | |
578 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
579 | } // track1 | |
580 | return; | |
581 | } | |
582 | ||
1fef78c8 | 583 | //__________________________________________________________________________ |
9bf6860b | 584 | void AliMUONVTrackReconstructor::AskForNewClustersInChamber(const AliMUONTrackParam &trackParam, |
585 | AliMUONVClusterStore& clusterStore, Int_t chamber) | |
1fef78c8 | 586 | { |
587 | /// Ask the clustering to reconstruct new clusters around the track candidate position | |
1fef78c8 | 588 | |
9bf6860b | 589 | // check if the current chamber is useable |
a0dc65b4 | 590 | if (!fClusterServer || !GetRecoParam()->UseChamber(chamber)) return; |
1fef78c8 | 591 | |
9bf6860b | 592 | // maximum distance between the center of the chamber and a detection element |
593 | // (accounting for the inclination of the chamber) | |
b89ac3d6 | 594 | static const Double_t kMaxDZ = 15.; // 15 cm |
1fef78c8 | 595 | |
9bf6860b | 596 | // extrapolate track parameters to the chamber |
597 | AliMUONTrackParam extrapTrackParam(trackParam); | |
4ea3f013 | 598 | if (!AliMUONTrackExtrap::ExtrapToZCov(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(chamber))) return; |
9bf6860b | 599 | |
6b191dea | 600 | // build the searching area using the track and chamber resolutions and the maximum-distance-to-track value |
9bf6860b | 601 | const TMatrixD& kParamCov = extrapTrackParam.GetCovariances(); |
6b191dea | 602 | Double_t errX2 = kParamCov(0,0) + kMaxDZ * kMaxDZ * kParamCov(1,1) + 2. * kMaxDZ * TMath::Abs(kParamCov(0,1)) + |
603 | GetRecoParam()->GetDefaultNonBendingReso(chamber) * GetRecoParam()->GetDefaultNonBendingReso(chamber); | |
604 | Double_t errY2 = kParamCov(2,2) + kMaxDZ * kMaxDZ * kParamCov(3,3) + 2. * kMaxDZ * TMath::Abs(kParamCov(2,3)) + | |
605 | GetRecoParam()->GetDefaultBendingReso(chamber) * GetRecoParam()->GetDefaultBendingReso(chamber); | |
b89ac3d6 | 606 | Double_t dX = TMath::Abs(trackParam.GetNonBendingSlope()) * kMaxDZ + |
a0dc65b4 | 607 | GetRecoParam()->GetMaxNonBendingDistanceToTrack() + |
6b191dea | 608 | GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errX2); |
b89ac3d6 | 609 | Double_t dY = TMath::Abs(trackParam.GetBendingSlope()) * kMaxDZ + |
a0dc65b4 | 610 | GetRecoParam()->GetMaxBendingDistanceToTrack() + |
6b191dea | 611 | GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errY2); |
6e97fbb8 | 612 | AliMpArea area(extrapTrackParam.GetNonBendingCoor(), |
613 | extrapTrackParam.GetBendingCoor(), | |
614 | dX, dY); | |
1fef78c8 | 615 | |
616 | // ask to cluterize in the given area of the given chamber | |
35be7ed7 | 617 | fClusterServer->Clusterize(chamber, clusterStore, area, GetRecoParam()); |
1fef78c8 | 618 | |
9bf6860b | 619 | } |
620 | ||
621 | //__________________________________________________________________________ | |
622 | void AliMUONVTrackReconstructor::AskForNewClustersInStation(const AliMUONTrackParam &trackParam, | |
623 | AliMUONVClusterStore& clusterStore, Int_t station) | |
624 | { | |
625 | /// Ask the clustering to reconstruct new clusters around the track candidate position | |
626 | /// in the 2 chambers of the given station | |
627 | AskForNewClustersInChamber(trackParam, clusterStore, 2*station+1); | |
628 | AskForNewClustersInChamber(trackParam, clusterStore, 2*station); | |
1fef78c8 | 629 | } |
630 | ||
ea94c18b | 631 | //__________________________________________________________________________ |
96ebe67e | 632 | Double_t AliMUONVTrackReconstructor::TryOneCluster(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster, |
1fef78c8 | 633 | AliMUONTrackParam &trackParamAtCluster, Bool_t updatePropagator) |
ea94c18b | 634 | { |
96ebe67e | 635 | /// Test the compatibility between the track and the cluster (using trackParam's covariance matrix): |
ea94c18b | 636 | /// return the corresponding Chi2 |
96ebe67e | 637 | /// return trackParamAtCluster |
ea94c18b | 638 | |
96ebe67e | 639 | // extrapolate track parameters and covariances at the z position of the tested cluster |
4ea3f013 | 640 | // and set pointer to cluster into trackParamAtCluster |
96ebe67e | 641 | trackParamAtCluster = trackParam; |
96ebe67e | 642 | trackParamAtCluster.SetClusterPtr(cluster); |
4ea3f013 | 643 | if (!AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtCluster, cluster->GetZ(), updatePropagator)) |
644 | return 2.*AliMUONTrack::MaxChi2(); | |
ea94c18b | 645 | |
96ebe67e | 646 | // Set differences between trackParam and cluster in the bending and non bending directions |
647 | Double_t dX = cluster->GetX() - trackParamAtCluster.GetNonBendingCoor(); | |
648 | Double_t dY = cluster->GetY() - trackParamAtCluster.GetBendingCoor(); | |
ea94c18b | 649 | |
019df241 | 650 | // Calculate errors and covariances |
96ebe67e | 651 | const TMatrixD& kParamCov = trackParamAtCluster.GetCovariances(); |
652 | Double_t sigmaX2 = kParamCov(0,0) + cluster->GetErrX2(); | |
653 | Double_t sigmaY2 = kParamCov(2,2) + cluster->GetErrY2(); | |
6b191dea | 654 | Double_t covXY = kParamCov(0,2); |
655 | Double_t det = sigmaX2 * sigmaY2 - covXY * covXY; | |
019df241 | 656 | |
657 | // Compute chi2 | |
4ea3f013 | 658 | if (det == 0.) return 2.*AliMUONTrack::MaxChi2(); |
6b191dea | 659 | return (dX * dX * sigmaY2 + dY * dY * sigmaX2 - 2. * dX * dY * covXY) / det; |
019df241 | 660 | |
661 | } | |
662 | ||
663 | //__________________________________________________________________________ | |
5a240757 | 664 | Bool_t AliMUONVTrackReconstructor::TryOneClusterFast(const AliMUONTrackParam &trackParam, const AliMUONVCluster* cluster) |
019df241 | 665 | { |
9bf6860b | 666 | /// Test the compatibility between the track and the cluster |
6b191dea | 667 | /// given the track and cluster resolutions + the maximum-distance-to-track value |
9bf6860b | 668 | /// and assuming linear propagation of the track: |
019df241 | 669 | /// return kTRUE if they are compatibles |
670 | ||
96ebe67e | 671 | Double_t dZ = cluster->GetZ() - trackParam.GetZ(); |
672 | Double_t dX = cluster->GetX() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ); | |
673 | Double_t dY = cluster->GetY() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ); | |
9bf6860b | 674 | const TMatrixD& kParamCov = trackParam.GetCovariances(); |
6b191dea | 675 | Double_t errX2 = kParamCov(0,0) + dZ * dZ * kParamCov(1,1) + 2. * dZ * kParamCov(0,1) + cluster->GetErrX2(); |
676 | Double_t errY2 = kParamCov(2,2) + dZ * dZ * kParamCov(3,3) + 2. * dZ * kParamCov(2,3) + cluster->GetErrY2(); | |
9bf6860b | 677 | |
6b191dea | 678 | Double_t dXmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errX2) + |
a0dc65b4 | 679 | GetRecoParam()->GetMaxNonBendingDistanceToTrack(); |
6b191dea | 680 | Double_t dYmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errY2) + |
a0dc65b4 | 681 | GetRecoParam()->GetMaxBendingDistanceToTrack(); |
019df241 | 682 | |
9bf6860b | 683 | if (TMath::Abs(dX) > dXmax || TMath::Abs(dY) > dYmax) return kFALSE; |
019df241 | 684 | |
685 | return kTRUE; | |
686 | ||
687 | } | |
688 | ||
689 | //__________________________________________________________________________ | |
96ebe67e | 690 | Double_t AliMUONVTrackReconstructor::TryTwoClustersFast(const AliMUONTrackParam &trackParamAtCluster1, AliMUONVCluster* cluster2, |
691 | AliMUONTrackParam &trackParamAtCluster2) | |
019df241 | 692 | { |
96ebe67e | 693 | /// Test the compatibility between the track and the 2 clusters together (using trackParam's covariance matrix) |
694 | /// assuming linear propagation between the two clusters: | |
695 | /// return the corresponding Chi2 accounting for covariances between the 2 clusters | |
696 | /// return trackParamAtCluster2 | |
019df241 | 697 | |
96ebe67e | 698 | // extrapolate linearly track parameters and covariances at the z position of the second cluster |
699 | trackParamAtCluster2 = trackParamAtCluster1; | |
3fe6651e | 700 | AliMUONTrackExtrap::LinearExtrapToZCov(&trackParamAtCluster2, cluster2->GetZ()); |
019df241 | 701 | |
96ebe67e | 702 | // set pointer to cluster2 into trackParamAtCluster2 |
703 | trackParamAtCluster2.SetClusterPtr(cluster2); | |
019df241 | 704 | |
96ebe67e | 705 | // Set differences between track and clusters in the bending and non bending directions |
706 | AliMUONVCluster* cluster1 = trackParamAtCluster1.GetClusterPtr(); | |
707 | Double_t dX1 = cluster1->GetX() - trackParamAtCluster1.GetNonBendingCoor(); | |
708 | Double_t dX2 = cluster2->GetX() - trackParamAtCluster2.GetNonBendingCoor(); | |
709 | Double_t dY1 = cluster1->GetY() - trackParamAtCluster1.GetBendingCoor(); | |
710 | Double_t dY2 = cluster2->GetY() - trackParamAtCluster2.GetBendingCoor(); | |
019df241 | 711 | |
712 | // Calculate errors and covariances | |
96ebe67e | 713 | const TMatrixD& kParamCov1 = trackParamAtCluster1.GetCovariances(); |
714 | const TMatrixD& kParamCov2 = trackParamAtCluster2.GetCovariances(); | |
715 | Double_t dZ = trackParamAtCluster2.GetZ() - trackParamAtCluster1.GetZ(); | |
716 | Double_t sigma2X1 = kParamCov1(0,0) + cluster1->GetErrX2(); | |
717 | Double_t sigma2X2 = kParamCov2(0,0) + cluster2->GetErrX2(); | |
019df241 | 718 | Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1); |
96ebe67e | 719 | Double_t sigma2Y1 = kParamCov1(2,2) + cluster1->GetErrY2(); |
720 | Double_t sigma2Y2 = kParamCov2(2,2) + cluster2->GetErrY2(); | |
019df241 | 721 | Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3); |
722 | ||
723 | // Compute chi2 | |
724 | Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2; | |
725 | Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2; | |
4ea3f013 | 726 | if (detX == 0. || detY == 0.) return 2.*AliMUONTrack::MaxChi2(); |
019df241 | 727 | return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX |
728 | + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY; | |
729 | ||
730 | } | |
731 | ||
732 | //__________________________________________________________________________ | |
9bf6860b | 733 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInChamber(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore, |
734 | Int_t nextChamber) | |
735 | { | |
736 | /// Follow trackCandidate in chamber(0..) nextChamber assuming linear propagation, and search for compatible cluster(s) | |
737 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: | |
738 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
739 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
740 | /// Remove the obsolete "trackCandidate" at the end. | |
741 | /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority. | |
742 | /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE) | |
743 | AliDebug(1,Form("Enter FollowLinearTrackInChamber(1..) %d", nextChamber+1)); | |
744 | ||
4ea3f013 | 745 | Double_t chi2WithOneCluster = AliMUONTrack::MaxChi2(); |
a0dc65b4 | 746 | Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() * |
747 | GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2 | |
9bf6860b | 748 | Double_t bestChi2WithOneCluster = maxChi2WithOneCluster; |
749 | Bool_t foundOneCluster = kFALSE; | |
750 | AliMUONTrack *newTrack = 0x0; | |
751 | AliMUONVCluster *cluster; | |
752 | AliMUONTrackParam trackParam; | |
753 | AliMUONTrackParam extrapTrackParamAtCluster; | |
754 | AliMUONTrackParam bestTrackParamAtCluster; | |
755 | ||
756 | // Get track parameters according to the propagation direction | |
757 | if (nextChamber > 7) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last(); | |
758 | else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First(); | |
759 | ||
760 | // Printout for debuging | |
761 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) { | |
762 | cout<<endl<<"Track parameters and covariances at first cluster:"<<endl; | |
763 | trackParam.GetParameters().Print(); | |
764 | trackParam.GetCovariances().Print(); | |
765 | } | |
766 | ||
767 | // Add MCS effect | |
4663da9f | 768 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(trackParam.GetClusterPtr()->GetChamberId()),-1.); |
9bf6860b | 769 | |
770 | // Printout for debuging | |
771 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
772 | cout << "FollowLinearTrackInChamber: look for cluster in chamber(1..): " << nextChamber+1 << endl; | |
773 | } | |
774 | ||
775 | // Create iterators to loop over clusters in chamber | |
776 | TIter next(clusterStore.CreateChamberIterator(nextChamber,nextChamber)); | |
777 | ||
778 | // look for candidates in chamber | |
779 | while ( ( cluster = static_cast<AliMUONVCluster*>(next()) ) ) { | |
780 | ||
781 | // try to add the current cluster fast | |
782 | if (!TryOneClusterFast(trackParam, cluster)) continue; | |
783 | ||
784 | // try to add the current cluster accuratly | |
785 | extrapTrackParamAtCluster = trackParam; | |
3fe6651e | 786 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster, cluster->GetZ()); |
9bf6860b | 787 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster, cluster, extrapTrackParamAtCluster); |
788 | ||
789 | // if good chi2 then consider to add cluster | |
790 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
791 | foundOneCluster = kTRUE; | |
792 | ||
793 | // Printout for debuging | |
794 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
795 | cout << "FollowLinearTrackInChamber: found one cluster in chamber(1..): " << nextChamber+1 | |
796 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
797 | cluster->Print(); | |
798 | } | |
799 | ||
a0dc65b4 | 800 | if (GetRecoParam()->TrackAllTracks()) { |
9bf6860b | 801 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
802 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
a0dc65b4 | 803 | if (GetRecoParam()->RequestStation(nextChamber/2)) |
9bf6860b | 804 | extrapTrackParamAtCluster.SetRemovable(kFALSE); |
805 | else extrapTrackParamAtCluster.SetRemovable(kTRUE); | |
806 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster,*cluster); | |
89c8d66d | 807 | newTrack->SetGlobalChi2(trackCandidate.GetGlobalChi2()+chi2WithOneCluster); |
9bf6860b | 808 | fNRecTracks++; |
809 | ||
810 | // Printout for debuging | |
811 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
812 | cout << "FollowLinearTrackInChamber: added one cluster in chamber(1..): " << nextChamber+1 << endl; | |
813 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
814 | } | |
815 | ||
816 | } else if (chi2WithOneCluster < bestChi2WithOneCluster) { | |
817 | // keep track of the best cluster | |
818 | bestChi2WithOneCluster = chi2WithOneCluster; | |
819 | bestTrackParamAtCluster = extrapTrackParamAtCluster; | |
820 | } | |
821 | ||
822 | } | |
823 | ||
824 | } | |
825 | ||
826 | // fill out the best track if required else clean up the fRecTracksPtr array | |
a0dc65b4 | 827 | if (!GetRecoParam()->TrackAllTracks()) { |
9bf6860b | 828 | if (foundOneCluster) { |
a0dc65b4 | 829 | if (GetRecoParam()->RequestStation(nextChamber/2)) |
9bf6860b | 830 | bestTrackParamAtCluster.SetRemovable(kFALSE); |
831 | else bestTrackParamAtCluster.SetRemovable(kTRUE); | |
832 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster,*(bestTrackParamAtCluster.GetClusterPtr())); | |
89c8d66d | 833 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithOneCluster); |
9bf6860b | 834 | |
835 | // Printout for debuging | |
836 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
837 | cout << "FollowLinearTrackInChamber: added the best cluster in chamber(1..): " << bestTrackParamAtCluster.GetClusterPtr()->GetChamberId()+1 << endl; | |
838 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
839 | } | |
840 | ||
841 | } else return kFALSE; | |
842 | ||
843 | } else if (foundOneCluster) { | |
844 | ||
845 | // remove obsolete track | |
846 | fRecTracksPtr->Remove(&trackCandidate); | |
847 | fNRecTracks--; | |
848 | ||
849 | } else return kFALSE; | |
850 | ||
851 | return kTRUE; | |
852 | ||
853 | } | |
854 | ||
855 | //__________________________________________________________________________ | |
96ebe67e | 856 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore, |
857 | Int_t nextStation) | |
019df241 | 858 | { |
96ebe67e | 859 | /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible cluster(s) |
019df241 | 860 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: |
861 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
862 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
863 | /// Remove the obsolete "trackCandidate" at the end. | |
96ebe67e | 864 | /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority. |
865 | /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE) | |
019df241 | 866 | AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1)); |
867 | ||
868 | // Order the chamber according to the propagation direction (tracking starts with chamber 2): | |
869 | // - nextStation == station(1...) 5 => forward propagation | |
870 | // - nextStation < station(1...) 5 => backward propagation | |
871 | Int_t ch1, ch2; | |
872 | if (nextStation==4) { | |
873 | ch1 = 2*nextStation+1; | |
874 | ch2 = 2*nextStation; | |
ea94c18b | 875 | } else { |
019df241 | 876 | ch1 = 2*nextStation; |
877 | ch2 = 2*nextStation+1; | |
ea94c18b | 878 | } |
879 | ||
4ea3f013 | 880 | Double_t chi2WithOneCluster = AliMUONTrack::MaxChi2(); |
881 | Double_t chi2WithTwoClusters = AliMUONTrack::MaxChi2(); | |
a0dc65b4 | 882 | Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() * |
883 | GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2 | |
884 | Double_t maxChi2WithTwoClusters = 4. * GetRecoParam()->GetSigmaCutForTracking() * | |
885 | GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2 | |
96ebe67e | 886 | Double_t bestChi2WithOneCluster = maxChi2WithOneCluster; |
887 | Double_t bestChi2WithTwoClusters = maxChi2WithTwoClusters; | |
888 | Bool_t foundOneCluster = kFALSE; | |
889 | Bool_t foundTwoClusters = kFALSE; | |
019df241 | 890 | AliMUONTrack *newTrack = 0x0; |
96ebe67e | 891 | AliMUONVCluster *clusterCh1, *clusterCh2; |
7332f213 | 892 | AliMUONTrackParam trackParam; |
96ebe67e | 893 | AliMUONTrackParam extrapTrackParamAtCluster1; |
894 | AliMUONTrackParam extrapTrackParamAtCluster2; | |
895 | AliMUONTrackParam bestTrackParamAtCluster1; | |
896 | AliMUONTrackParam bestTrackParamAtCluster2; | |
897 | ||
898 | Int_t nClusters = clusterStore.GetSize(); | |
899 | Bool_t *clusterCh1Used = new Bool_t[nClusters]; | |
900 | for (Int_t i = 0; i < nClusters; i++) clusterCh1Used[i] = kFALSE; | |
901 | Int_t iCluster1; | |
019df241 | 902 | |
7332f213 | 903 | // Get track parameters according to the propagation direction |
904 | if (nextStation==4) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last(); | |
905 | else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First(); | |
019df241 | 906 | |
9bf6860b | 907 | // Printout for debuging |
908 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) { | |
909 | cout<<endl<<"Track parameters and covariances at first cluster:"<<endl; | |
910 | trackParam.GetParameters().Print(); | |
911 | trackParam.GetCovariances().Print(); | |
912 | } | |
913 | ||
019df241 | 914 | // Add MCS effect |
4663da9f | 915 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(trackParam.GetClusterPtr()->GetChamberId()),-1.); |
019df241 | 916 | |
917 | // Printout for debuging | |
918 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 919 | cout << "FollowLinearTrackInStation: look for clusters in chamber(1..): " << ch2+1 << endl; |
019df241 | 920 | } |
921 | ||
96ebe67e | 922 | // Create iterators to loop over clusters in both chambers |
923 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
924 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
925 | ||
926 | // look for candidates in chamber 2 | |
927 | while ( ( clusterCh2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
019df241 | 928 | |
96ebe67e | 929 | // try to add the current cluster fast |
930 | if (!TryOneClusterFast(trackParam, clusterCh2)) continue; | |
019df241 | 931 | |
96ebe67e | 932 | // try to add the current cluster accuratly |
933 | extrapTrackParamAtCluster2 = trackParam; | |
3fe6651e | 934 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster2, clusterCh2->GetZ()); |
96ebe67e | 935 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster2, clusterCh2, extrapTrackParamAtCluster2); |
019df241 | 936 | |
96ebe67e | 937 | // if good chi2 then try to attach a cluster in the other chamber too |
938 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
939 | Bool_t foundSecondCluster = kFALSE; | |
019df241 | 940 | |
941 | // Printout for debuging | |
942 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 943 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch2+1 |
944 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
9bf6860b | 945 | clusterCh2->Print(); |
96ebe67e | 946 | cout << " look for second clusters in chamber(1..): " << ch1+1 << " ..." << endl; |
019df241 | 947 | } |
948 | ||
949 | // add MCS effect | |
4663da9f | 950 | AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtCluster2,AliMUONConstants::ChamberThicknessInX0(ch2),-1.); |
019df241 | 951 | |
96ebe67e | 952 | // reset cluster iterator of chamber 1 |
953 | nextInCh1.Reset(); | |
954 | iCluster1 = -1; | |
955 | ||
956 | // look for second candidates in chamber 1 | |
957 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
958 | iCluster1++; | |
019df241 | 959 | |
96ebe67e | 960 | // try to add the current cluster fast |
961 | if (!TryOneClusterFast(extrapTrackParamAtCluster2, clusterCh1)) continue; | |
019df241 | 962 | |
96ebe67e | 963 | // try to add the current cluster in addition to the one found in the previous chamber |
964 | chi2WithTwoClusters = TryTwoClustersFast(extrapTrackParamAtCluster2, clusterCh1, extrapTrackParamAtCluster1); | |
019df241 | 965 | |
96ebe67e | 966 | // if good chi2 then consider to add the 2 clusters to the "trackCandidate" |
967 | if (chi2WithTwoClusters < maxChi2WithTwoClusters) { | |
968 | foundSecondCluster = kTRUE; | |
969 | foundTwoClusters = kTRUE; | |
019df241 | 970 | |
971 | // Printout for debuging | |
972 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 973 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 |
9bf6860b | 974 | << " (Chi2 = " << chi2WithTwoClusters << ")" << endl; |
975 | clusterCh1->Print(); | |
019df241 | 976 | } |
977 | ||
a0dc65b4 | 978 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 979 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new clusters |
019df241 | 980 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
96ebe67e | 981 | extrapTrackParamAtCluster1.SetRemovable(kTRUE); |
982 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); | |
983 | extrapTrackParamAtCluster2.SetRemovable(kTRUE); | |
984 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); | |
89c8d66d | 985 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithTwoClusters); |
019df241 | 986 | fNRecTracks++; |
987 | ||
96ebe67e | 988 | // Tag clusterCh1 as used |
989 | clusterCh1Used[iCluster1] = kTRUE; | |
019df241 | 990 | |
991 | // Printout for debuging | |
992 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 993 | cout << "FollowLinearTrackInStation: added two clusters in station(1..): " << nextStation+1 << endl; |
019df241 | 994 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
995 | } | |
996 | ||
96ebe67e | 997 | } else if (chi2WithTwoClusters < bestChi2WithTwoClusters) { |
998 | // keep track of the best couple of clusters | |
999 | bestChi2WithTwoClusters = chi2WithTwoClusters; | |
1000 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
1001 | bestTrackParamAtCluster2 = extrapTrackParamAtCluster2; | |
019df241 | 1002 | } |
1003 | ||
1004 | } | |
1005 | ||
1006 | } | |
1007 | ||
96ebe67e | 1008 | // if no cluster found in chamber1 then consider to add clusterCh2 only |
1009 | if (!foundSecondCluster) { | |
1010 | foundOneCluster = kTRUE; | |
019df241 | 1011 | |
a0dc65b4 | 1012 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1013 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
019df241 | 1014 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
a0dc65b4 | 1015 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1016 | extrapTrackParamAtCluster2.SetRemovable(kFALSE); |
1017 | else extrapTrackParamAtCluster2.SetRemovable(kTRUE); | |
96ebe67e | 1018 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); |
89c8d66d | 1019 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithOneCluster); |
019df241 | 1020 | fNRecTracks++; |
1021 | ||
1022 | // Printout for debuging | |
1023 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1024 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch2+1 << endl; |
019df241 | 1025 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1026 | } | |
1027 | ||
96ebe67e | 1028 | } else if (!foundTwoClusters && chi2WithOneCluster < bestChi2WithOneCluster) { |
1029 | // keep track of the best cluster except if a couple of clusters has already been found | |
1030 | bestChi2WithOneCluster = chi2WithOneCluster; | |
1031 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster2; | |
019df241 | 1032 | } |
1033 | ||
1034 | } | |
1035 | ||
1036 | } | |
1037 | ||
1038 | } | |
1039 | ||
1040 | // look for candidates in chamber 1 not already attached to a track | |
96ebe67e | 1041 | // if we want to keep all possible tracks or if no good couple of clusters has been found |
a0dc65b4 | 1042 | if (GetRecoParam()->TrackAllTracks() || !foundTwoClusters) { |
019df241 | 1043 | |
1044 | // Printout for debuging | |
1045 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1046 | cout << "FollowLinearTrackInStation: look for single cluster in chamber(1..): " << ch1+1 << endl; |
019df241 | 1047 | } |
1048 | ||
1049 | //Extrapolate trackCandidate to chamber "ch2" | |
3fe6651e | 1050 | AliMUONTrackExtrap::LinearExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(ch2)); |
019df241 | 1051 | |
1052 | // add MCS effect for next step | |
4663da9f | 1053 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(ch2),-1.); |
9bf6860b | 1054 | |
96ebe67e | 1055 | // reset cluster iterator of chamber 1 |
1056 | nextInCh1.Reset(); | |
1057 | iCluster1 = -1; | |
1058 | ||
1059 | // look for second candidates in chamber 1 | |
1060 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
1061 | iCluster1++; | |
019df241 | 1062 | |
96ebe67e | 1063 | if (clusterCh1Used[iCluster1]) continue; // Skip clusters already used |
019df241 | 1064 | |
96ebe67e | 1065 | // try to add the current cluster fast |
1066 | if (!TryOneClusterFast(trackParam, clusterCh1)) continue; | |
9bf6860b | 1067 | |
96ebe67e | 1068 | // try to add the current cluster accuratly |
1069 | extrapTrackParamAtCluster1 = trackParam; | |
3fe6651e | 1070 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster1, clusterCh1->GetZ()); |
96ebe67e | 1071 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster1, clusterCh1, extrapTrackParamAtCluster1); |
9bf6860b | 1072 | |
96ebe67e | 1073 | // if good chi2 then consider to add clusterCh1 |
1074 | // We do not try to attach a cluster in the other chamber too since it has already been done above | |
1075 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
1076 | foundOneCluster = kTRUE; | |
019df241 | 1077 | |
1078 | // Printout for debuging | |
1079 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1080 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 |
1081 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
9bf6860b | 1082 | clusterCh1->Print(); |
019df241 | 1083 | } |
1084 | ||
a0dc65b4 | 1085 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1086 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
019df241 | 1087 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
a0dc65b4 | 1088 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1089 | extrapTrackParamAtCluster1.SetRemovable(kFALSE); |
1090 | else extrapTrackParamAtCluster1.SetRemovable(kTRUE); | |
96ebe67e | 1091 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); |
89c8d66d | 1092 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithOneCluster); |
019df241 | 1093 | fNRecTracks++; |
1094 | ||
1095 | // Printout for debuging | |
1096 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1097 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch1+1 << endl; |
019df241 | 1098 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1099 | } | |
1100 | ||
96ebe67e | 1101 | } else if (chi2WithOneCluster < bestChi2WithOneCluster) { |
1102 | // keep track of the best cluster except if a couple of clusters has already been found | |
1103 | bestChi2WithOneCluster = chi2WithOneCluster; | |
1104 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
019df241 | 1105 | } |
1106 | ||
1107 | } | |
1108 | ||
1109 | } | |
1110 | ||
1111 | } | |
1112 | ||
1113 | // fill out the best track if required else clean up the fRecTracksPtr array | |
a0dc65b4 | 1114 | if (!GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1115 | if (foundTwoClusters) { |
1116 | bestTrackParamAtCluster1.SetRemovable(kTRUE); | |
1117 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); | |
1118 | bestTrackParamAtCluster2.SetRemovable(kTRUE); | |
1119 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster2,*(bestTrackParamAtCluster2.GetClusterPtr())); | |
89c8d66d | 1120 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithTwoClusters); |
019df241 | 1121 | |
1122 | // Printout for debuging | |
1123 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1124 | cout << "FollowLinearTrackInStation: added the two best clusters in station(1..): " << nextStation+1 << endl; |
019df241 | 1125 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1126 | } | |
1127 | ||
96ebe67e | 1128 | } else if (foundOneCluster) { |
a0dc65b4 | 1129 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1130 | bestTrackParamAtCluster1.SetRemovable(kFALSE); |
1131 | else bestTrackParamAtCluster1.SetRemovable(kTRUE); | |
96ebe67e | 1132 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); |
89c8d66d | 1133 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithOneCluster); |
019df241 | 1134 | |
1135 | // Printout for debuging | |
1136 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1137 | cout << "FollowLinearTrackInStation: added the best cluster in chamber(1..): " << bestTrackParamAtCluster1.GetClusterPtr()->GetChamberId()+1 << endl; |
019df241 | 1138 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1139 | } | |
1140 | ||
dd230855 | 1141 | } else { |
96ebe67e | 1142 | delete [] clusterCh1Used; |
dd230855 | 1143 | return kFALSE; |
1144 | } | |
019df241 | 1145 | |
96ebe67e | 1146 | } else if (foundOneCluster || foundTwoClusters) { |
019df241 | 1147 | |
1148 | // remove obsolete track | |
1149 | fRecTracksPtr->Remove(&trackCandidate); | |
1150 | fNRecTracks--; | |
1151 | ||
dd230855 | 1152 | } else { |
96ebe67e | 1153 | delete [] clusterCh1Used; |
dd230855 | 1154 | return kFALSE; |
1155 | } | |
ea94c18b | 1156 | |
96ebe67e | 1157 | delete [] clusterCh1Used; |
019df241 | 1158 | return kTRUE; |
ea94c18b | 1159 | |
1160 | } | |
1161 | ||
7332f213 | 1162 | //__________________________________________________________________________ |
1163 | void AliMUONVTrackReconstructor::ImproveTracks() | |
1164 | { | |
1165 | /// Improve tracks by removing clusters with local chi2 highter than the defined cut | |
1166 | /// Recompute track parameters and covariances at the remaining clusters | |
1167 | AliDebug(1,"Enter ImproveTracks"); | |
1168 | ||
1169 | AliMUONTrack *track, *nextTrack; | |
1170 | ||
7332f213 | 1171 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
1172 | while (track) { | |
1173 | ||
1174 | // prepare next track in case the actual track is suppressed | |
1175 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); | |
1176 | ||
1177 | ImproveTrack(*track); | |
1178 | ||
1179 | // remove track if improvement failed | |
1180 | if (!track->IsImproved()) { | |
1181 | fRecTracksPtr->Remove(track); | |
1182 | fNRecTracks--; | |
1183 | } | |
1184 | ||
1185 | track = nextTrack; | |
1186 | } | |
1187 | ||
1188 | // compress the array in case of some tracks have been removed | |
1189 | fRecTracksPtr->Compress(); | |
1190 | ||
1191 | } | |
1192 | ||
1193 | //__________________________________________________________________________ | |
1194 | void AliMUONVTrackReconstructor::Finalize() | |
1195 | { | |
1196 | /// Recompute track parameters and covariances at each attached cluster from those at the first one | |
2e2d0c44 | 1197 | /// Set the label pointing to the corresponding MC track |
4ea3f013 | 1198 | /// Remove the track if finalization failed |
7332f213 | 1199 | |
4ea3f013 | 1200 | AliMUONTrack *track, *nextTrack; |
1201 | Bool_t trackRemoved = kFALSE; | |
7332f213 | 1202 | |
1203 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
1204 | while (track) { | |
1205 | ||
4ea3f013 | 1206 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); |
7332f213 | 1207 | |
4ea3f013 | 1208 | if (FinalizeTrack(*track)) track->FindMCLabel(); |
1209 | else { | |
1210 | fRecTracksPtr->Remove(track); | |
1211 | fNRecTracks--; | |
1212 | trackRemoved = kTRUE; | |
1213 | } | |
2e2d0c44 | 1214 | |
4ea3f013 | 1215 | track = nextTrack; |
7332f213 | 1216 | |
1217 | } | |
1218 | ||
4ea3f013 | 1219 | // compress array of tracks if needed |
1220 | if (trackRemoved) fRecTracksPtr->Compress(); | |
1221 | ||
7332f213 | 1222 | } |
1223 | ||
1224 | //__________________________________________________________________________ | |
7ec3b9cf | 1225 | void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore, |
1226 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
1227 | const AliMUONVTriggerStore& triggerStore, | |
1228 | const AliMUONTrackHitPattern& trackHitPattern) | |
8d0843c6 | 1229 | { |
1230 | /// Try to match track from tracking system with trigger track | |
99c136e1 | 1231 | AliCodeTimerAuto("",0); |
fda59e58 | 1232 | |
683cb6c5 | 1233 | trackHitPattern.ExecuteValidation(trackStore, triggerTrackStore, triggerStore); |
8d0843c6 | 1234 | } |
1235 | ||
ea94c18b | 1236 | //__________________________________________________________________________ |
1237 | void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit, | |
1238 | const AliMUONVTriggerStore& triggerStore, | |
1239 | AliMUONVTriggerTrackStore& triggerTrackStore) | |
8d0843c6 | 1240 | { |
71a2d3aa | 1241 | /// To make the trigger tracks from Local Trigger |
7ec3b9cf | 1242 | AliDebug(1, ""); |
99c136e1 | 1243 | AliCodeTimerAuto("",0); |
7ec3b9cf | 1244 | |
1245 | AliMUONGlobalTrigger* globalTrigger = triggerStore.Global(); | |
e6b25a6e | 1246 | |
7ec3b9cf | 1247 | UChar_t gloTrigPat = 0; |
e6b25a6e | 1248 | |
7ec3b9cf | 1249 | if (globalTrigger) |
1250 | { | |
1251 | gloTrigPat = globalTrigger->GetGlobalResponse(); | |
e6b25a6e | 1252 | } |
1253 | ||
7ec3b9cf | 1254 | TIter next(triggerStore.CreateIterator()); |
1255 | AliMUONLocalTrigger* locTrg(0x0); | |
8d0843c6 | 1256 | |
e6b25a6e | 1257 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); |
1258 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); | |
7cf63da6 | 1259 | |
7ec3b9cf | 1260 | AliMUONTriggerTrack triggerTrack; |
1261 | ||
1262 | while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) ) | |
1263 | { | |
d72d7b9e | 1264 | Bool_t xTrig=locTrg->IsTrigX(); |
1265 | Bool_t yTrig=locTrg->IsTrigY(); | |
7ec3b9cf | 1266 | |
32ab62c9 | 1267 | Int_t localBoardId = locTrg->LoCircuit(); |
7ec3b9cf | 1268 | |
1269 | if (xTrig && yTrig) | |
1270 | { // make Trigger Track if trigger in X and Y | |
8b0baca4 | 1271 | |
32ab62c9 | 1272 | Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX()); |
7ec3b9cf | 1273 | // need first to convert deviation to [0-30] |
1274 | // (see AliMUONLocalTriggerBoard::LocalTrigger) | |
d72d7b9e | 1275 | Int_t deviation = locTrg->GetDeviation(); |
7ec3b9cf | 1276 | Int_t stripX21 = locTrg->LoStripX()+deviation+1; |
32ab62c9 | 1277 | Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21); |
1278 | Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY()); | |
7ec3b9cf | 1279 | |
1280 | AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %f %f %f \n",locTrg->LoCircuit(), | |
1281 | locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11)); | |
1282 | ||
1283 | Float_t thetax = TMath::ATan2( x11 , z11 ); | |
1284 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); | |
abc2458f | 1285 | |
1286 | CorrectThetaRange(thetax); | |
1287 | CorrectThetaRange(thetay); | |
7ec3b9cf | 1288 | |
1289 | triggerTrack.SetX11(x11); | |
1290 | triggerTrack.SetY11(y11); | |
1291 | triggerTrack.SetThetax(thetax); | |
1292 | triggerTrack.SetThetay(thetay); | |
1293 | triggerTrack.SetGTPattern(gloTrigPat); | |
32ab62c9 | 1294 | triggerTrack.SetLoTrgNum(localBoardId); |
7ec3b9cf | 1295 | |
1296 | triggerTrackStore.Add(triggerTrack); | |
1297 | } // board is fired | |
e6b25a6e | 1298 | } // end of loop on Local Trigger |
8d0843c6 | 1299 | } |
ea94c18b | 1300 | |
abc2458f | 1301 | //__________________________________________________________________________ |
1302 | void AliMUONVTrackReconstructor::CorrectThetaRange(Float_t& theta) | |
1303 | { | |
1304 | /// The angles of the trigger tracks, obtained with ATan2, | |
1305 | /// have values around +pi and -pi. On the contrary, the angles | |
1306 | /// used in the tracker tracks have values around 0. | |
1307 | /// This function sets the same range for the trigger tracks angles. | |
1308 | if (theta < -TMath::PiOver2()) theta += TMath::Pi(); | |
1309 | else if(theta > TMath::PiOver2()) theta -= TMath::Pi(); | |
1310 | } |