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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 | |
bdfb6eef | 81 | #include "AliMpDDLStore.h" |
82 | #include "AliMpVSegmentation.h" | |
83 | #include "AliMpSegmentation.h" | |
84 | #include "AliMpPad.h" | |
85 | ||
ea94c18b | 86 | #include "AliLog.h" |
b709ac13 | 87 | #include "AliCodeTimer.h" |
ea94c18b | 88 | #include "AliTracker.h" |
8d0843c6 | 89 | |
4889d34c | 90 | #include <TClonesArray.h> |
91 | #include <TMath.h> | |
ea94c18b | 92 | #include <TMatrixD.h> |
1fef78c8 | 93 | #include <TVector2.h> |
ea94c18b | 94 | |
95 | #include <Riostream.h> | |
4889d34c | 96 | |
78649106 | 97 | /// \cond CLASSIMP |
8d0843c6 | 98 | ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context |
78649106 | 99 | /// \endcond |
8d0843c6 | 100 | |
ea94c18b | 101 | //__________________________________________________________________________ |
a0dc65b4 | 102 | AliMUONVTrackReconstructor::AliMUONVTrackReconstructor(const AliMUONRecoParam* recoParam, |
103 | AliMUONVClusterServer* clusterServer) | |
104 | : TObject(), | |
105 | fRecTracksPtr(0x0), | |
106 | fNRecTracks(0), | |
107 | fClusterServer(clusterServer), | |
6b191dea | 108 | fkRecoParam(recoParam), |
4663da9f | 109 | fMaxMCSAngle2(0x0) |
8d0843c6 | 110 | { |
111 | /// Constructor for class AliMUONVTrackReconstructor | |
b1fea02e | 112 | /// WARNING: if clusterServer=0x0, no clusterization will be possible at this level |
ea94c18b | 113 | |
114 | // Memory allocation for the TClonesArray of reconstructed tracks | |
96ebe67e | 115 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 100); |
7ec3b9cf | 116 | |
208f139e | 117 | // set the magnetic field for track extrapolations |
f7a1cc68 | 118 | AliMUONTrackExtrap::SetField(); |
6b191dea | 119 | |
120 | // set the maximum MCS angle in chamber from the minimum acceptable momentum | |
121 | AliMUONTrackParam param; | |
122 | Double_t inverseBendingP = (GetRecoParam()->GetMinBendingMomentum() > 0.) ? 1./GetRecoParam()->GetMinBendingMomentum() : 1.; | |
123 | param.SetInverseBendingMomentum(inverseBendingP); | |
4663da9f | 124 | fMaxMCSAngle2 = new Double_t [AliMUONConstants::NTrackingCh()]; |
125 | for (Int_t iCh=0; iCh<AliMUONConstants::NTrackingCh(); iCh++) | |
126 | fMaxMCSAngle2[iCh] = AliMUONTrackExtrap::GetMCSAngle2(param, AliMUONConstants::ChamberThicknessInX0(iCh), 1.); | |
6b191dea | 127 | |
8d0843c6 | 128 | } |
129 | ||
130 | //__________________________________________________________________________ | |
ea94c18b | 131 | AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor() |
8d0843c6 | 132 | { |
133 | /// Destructor for class AliMUONVTrackReconstructor | |
ea94c18b | 134 | delete fRecTracksPtr; |
4663da9f | 135 | delete[] fMaxMCSAngle2; |
8d0843c6 | 136 | } |
137 | ||
ea94c18b | 138 | //__________________________________________________________________________ |
139 | void AliMUONVTrackReconstructor::ResetTracks() | |
140 | { | |
141 | /// To reset the TClonesArray of reconstructed tracks | |
142 | if (fRecTracksPtr) fRecTracksPtr->Clear("C"); | |
143 | fNRecTracks = 0; | |
144 | return; | |
145 | } | |
146 | ||
147 | //__________________________________________________________________________ | |
1fef78c8 | 148 | void AliMUONVTrackReconstructor::EventReconstruct(AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore) |
ea94c18b | 149 | { |
150 | /// To reconstruct one event | |
151 | AliDebug(1,""); | |
99c136e1 | 152 | AliCodeTimerAuto("",0); |
ea94c18b | 153 | |
96ebe67e | 154 | // Reset array of tracks |
ea94c18b | 155 | ResetTracks(); |
2060b217 | 156 | |
89c8d66d | 157 | // Look for candidates from clusters in stations(1..) 4 and 5 (abort in case of failure) |
158 | if (!MakeTrackCandidates(clusterStore)) return; | |
96ebe67e | 159 | |
89c8d66d | 160 | // Look for extra candidates from clusters in stations(1..) 4 and 5 (abort in case of failure) |
161 | if (GetRecoParam()->MakeMoreTrackCandidates()) { | |
162 | if (!MakeMoreTrackCandidates(clusterStore)) return; | |
163 | } | |
9bf6860b | 164 | |
96ebe67e | 165 | // Stop tracking if no candidate found |
ea94c18b | 166 | if (fRecTracksPtr->GetEntriesFast() == 0) return; |
96ebe67e | 167 | |
89c8d66d | 168 | // Follow tracks in stations(1..) 3, 2 and 1 (abort in case of failure) |
169 | if (!FollowTracks(clusterStore)) return; | |
96ebe67e | 170 | |
b709ac13 | 171 | // Complement the reconstructed tracks |
89c8d66d | 172 | if (GetRecoParam()->ComplementTracks()) { |
173 | if (ComplementTracks(clusterStore)) RemoveIdenticalTracks(); | |
174 | } | |
96ebe67e | 175 | |
ea94c18b | 176 | // Improve the reconstructed tracks |
a0dc65b4 | 177 | if (GetRecoParam()->ImproveTracks()) ImproveTracks(); |
96ebe67e | 178 | |
c59f70b9 | 179 | // Remove connected tracks |
5c15a68b | 180 | RemoveConnectedTracks(3, 4, kFALSE); |
181 | RemoveConnectedTracks(2, 2, kFALSE); | |
182 | if (GetRecoParam()->RemoveConnectedTracksInSt12()) RemoveConnectedTracks(0, 1, kFALSE); | |
96ebe67e | 183 | |
ea94c18b | 184 | // Fill AliMUONTrack data members |
185 | Finalize(); | |
5c15a68b | 186 | if (!GetRecoParam()->RemoveConnectedTracksInSt12()) TagConnectedTracks(0, 1, kTRUE); |
96ebe67e | 187 | |
188 | // Add tracks to MUON data container | |
5c15a68b | 189 | for (Int_t i=0; i<fNRecTracks; ++i) |
96ebe67e | 190 | { |
191 | AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i); | |
4ea3f013 | 192 | if (track->GetGlobalChi2() < AliMUONTrack::MaxChi2()) { |
193 | track->SetUniqueID(i+1); | |
194 | trackStore.Add(*track); | |
195 | } else AliWarning("problem occur somewhere during track refitting --> discard track"); | |
96ebe67e | 196 | } |
ea94c18b | 197 | } |
198 | ||
6b191dea | 199 | //__________________________________________________________________________ |
200 | Bool_t AliMUONVTrackReconstructor::IsAcceptable(AliMUONTrackParam &trackParam) | |
201 | { | |
202 | /// Return kTRUE if the track is within given limits on momentum/angle/origin | |
203 | ||
204 | const TMatrixD& kParamCov = trackParam.GetCovariances(); | |
205 | Int_t chamber = trackParam.GetClusterPtr()->GetChamberId(); | |
206 | Double_t z = trackParam.GetZ(); | |
207 | Double_t sigmaCut = GetRecoParam()->GetSigmaCutForTracking(); | |
208 | ||
209 | // MCS dipersion | |
210 | Double_t angleMCS2 = 0.; | |
6b191dea | 211 | Double_t impactMCS2 = 0.; |
4663da9f | 212 | if (AliMUONTrackExtrap::IsFieldON() && chamber < 6) { |
213 | ||
214 | // track momentum is known | |
215 | for (Int_t iCh=0; iCh<=chamber; iCh++) { | |
216 | Double_t localMCS2 = AliMUONTrackExtrap::GetMCSAngle2(trackParam, AliMUONConstants::ChamberThicknessInX0(iCh), 1.); | |
217 | angleMCS2 += localMCS2; | |
218 | impactMCS2 += AliMUONConstants::DefaultChamberZ(chamber) * AliMUONConstants::DefaultChamberZ(chamber) * localMCS2; | |
219 | } | |
220 | ||
221 | } else { | |
222 | ||
223 | // track momentum is unknown | |
224 | for (Int_t iCh=0; iCh<=chamber; iCh++) { | |
225 | angleMCS2 += fMaxMCSAngle2[iCh]; | |
226 | impactMCS2 += AliMUONConstants::DefaultChamberZ(chamber) * AliMUONConstants::DefaultChamberZ(chamber) * fMaxMCSAngle2[iCh]; | |
227 | } | |
228 | ||
229 | } | |
6b191dea | 230 | |
231 | // ------ track selection in non bending direction ------ | |
232 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
233 | ||
234 | // check if non bending slope is within tolerances | |
4663da9f | 235 | Double_t nonBendingSlopeErr = TMath::Sqrt(kParamCov(1,1) + angleMCS2); |
6b191dea | 236 | if ((TMath::Abs(trackParam.GetNonBendingSlope()) - sigmaCut * nonBendingSlopeErr) > GetRecoParam()->GetMaxNonBendingSlope()) return kFALSE; |
237 | ||
238 | } else { | |
239 | ||
240 | // or check if non bending impact parameter is within tolerances | |
241 | Double_t nonBendingImpactParam = TMath::Abs(trackParam.GetNonBendingCoor() - z * trackParam.GetNonBendingSlope()); | |
242 | Double_t nonBendingImpactParamErr = TMath::Sqrt(kParamCov(0,0) + z * z * kParamCov(1,1) - 2. * z * kParamCov(0,1) + impactMCS2); | |
243 | if ((nonBendingImpactParam - sigmaCut * nonBendingImpactParamErr) > (3. * GetRecoParam()->GetNonBendingVertexDispersion())) return kFALSE; | |
244 | ||
245 | } | |
246 | ||
247 | // ------ track selection in bending direction ------ | |
248 | if (AliMUONTrackExtrap::IsFieldON()) { // depending whether the field is ON or OFF | |
249 | ||
250 | // check if bending momentum is within tolerances | |
251 | Double_t bendingMomentum = TMath::Abs(1. / trackParam.GetInverseBendingMomentum()); | |
252 | Double_t bendingMomentumErr = TMath::Sqrt(kParamCov(4,4)) * bendingMomentum * bendingMomentum; | |
253 | if (chamber < 6 && (bendingMomentum + sigmaCut * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) return kFALSE; | |
254 | else if ((bendingMomentum + 3. * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) return kFALSE; | |
255 | ||
256 | } else { | |
257 | ||
258 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
259 | ||
260 | // check if bending slope is within tolerances | |
4663da9f | 261 | Double_t bendingSlopeErr = TMath::Sqrt(kParamCov(3,3) + angleMCS2); |
6b191dea | 262 | if ((TMath::Abs(trackParam.GetBendingSlope()) - sigmaCut * bendingSlopeErr) > GetRecoParam()->GetMaxBendingSlope()) return kFALSE; |
263 | ||
264 | } else { | |
265 | ||
266 | // or check if bending impact parameter is within tolerances | |
267 | Double_t bendingImpactParam = TMath::Abs(trackParam.GetBendingCoor() - z * trackParam.GetBendingSlope()); | |
268 | Double_t bendingImpactParamErr = TMath::Sqrt(kParamCov(2,2) + z * z * kParamCov(3,3) - 2. * z * kParamCov(2,3) + impactMCS2); | |
269 | if ((bendingImpactParam - sigmaCut * bendingImpactParamErr) > (3. * GetRecoParam()->GetBendingVertexDispersion())) return kFALSE; | |
270 | ||
271 | } | |
272 | ||
273 | } | |
274 | ||
275 | return kTRUE; | |
276 | ||
277 | } | |
278 | ||
279 | //__________________________________________________________________________ | |
9bf6860b | 280 | TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsBetweenChambers(const AliMUONVClusterStore& clusterStore, Int_t ch1, Int_t ch2) |
8d0843c6 | 281 | { |
9bf6860b | 282 | /// To make the list of segments from the list of clusters in the 2 given chambers. |
208f139e | 283 | /// Return a new TClonesArray of segments. |
284 | /// It is the responsibility of the user to delete it afterward. | |
9bf6860b | 285 | AliDebug(1,Form("Enter MakeSegmentsBetweenChambers (1..) %d-%d", ch1+1, ch2+1)); |
99c136e1 | 286 | AliCodeTimerAuto("",0); |
208f139e | 287 | |
96ebe67e | 288 | AliMUONVCluster *cluster1, *cluster2; |
208f139e | 289 | AliMUONObjectPair *segment; |
6b191dea | 290 | Double_t z1 = 0., z2 = 0., dZ = 0.; |
291 | Double_t nonBendingSlope = 0., nonBendingSlopeErr = 0., nonBendingImpactParam = 0., nonBendingImpactParamErr = 0.; | |
292 | Double_t bendingSlope = 0., bendingSlopeErr = 0., bendingImpactParam = 0., bendingImpactParamErr = 0., bendingImpactParamErr2 = 0.; | |
293 | Double_t bendingMomentum = 0., bendingMomentumErr = 0.; | |
294 | Double_t bendingVertexDispersion2 = GetRecoParam()->GetBendingVertexDispersion() * GetRecoParam()->GetBendingVertexDispersion(); | |
4663da9f | 295 | Double_t angleMCS2 = 0.; // maximum angular dispersion**2 due to MCS in chamber |
296 | Double_t impactMCS2 = 0.; // maximum impact parameter dispersion**2 due to MCS in chamber | |
297 | for (Int_t iCh=0; iCh<=ch1; iCh++) { | |
298 | angleMCS2 += fMaxMCSAngle2[iCh]; | |
299 | impactMCS2 += AliMUONConstants::DefaultChamberZ(iCh) * AliMUONConstants::DefaultChamberZ(iCh) * fMaxMCSAngle2[iCh]; | |
300 | } | |
6b191dea | 301 | Double_t sigmaCut = GetRecoParam()->GetSigmaCutForTracking(); |
7ec3b9cf | 302 | |
96ebe67e | 303 | // Create iterators to loop over clusters in both chambers |
304 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
305 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
306 | ||
208f139e | 307 | // list of segments |
96ebe67e | 308 | TClonesArray *segments = new TClonesArray("AliMUONObjectPair", 100); |
7ec3b9cf | 309 | |
96ebe67e | 310 | // Loop over clusters in the first chamber of the station |
311 | while ( ( cluster1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
6b191dea | 312 | z1 = cluster1->GetZ(); |
96ebe67e | 313 | |
314 | // reset cluster iterator of chamber 2 | |
315 | nextInCh2.Reset(); | |
316 | ||
317 | // Loop over clusters in the second chamber of the station | |
318 | while ( ( cluster2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
6b191dea | 319 | z2 = cluster2->GetZ(); |
320 | dZ = z1 - z2; | |
96ebe67e | 321 | |
6b191dea | 322 | // ------ track selection in non bending direction ------ |
323 | nonBendingSlope = (cluster1->GetX() - cluster2->GetX()) / dZ; | |
324 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
9f093251 | 325 | |
6b191dea | 326 | // check if non bending slope is within tolerances |
4663da9f | 327 | nonBendingSlopeErr = TMath::Sqrt((cluster1->GetErrX2() + cluster2->GetErrX2()) / dZ / dZ + angleMCS2); |
6b191dea | 328 | if ((TMath::Abs(nonBendingSlope) - sigmaCut * nonBendingSlopeErr) > GetRecoParam()->GetMaxNonBendingSlope()) continue; |
9f093251 | 329 | |
6b191dea | 330 | } else { |
331 | ||
332 | // or check if non bending impact parameter is within tolerances | |
333 | nonBendingImpactParam = TMath::Abs(cluster1->GetX() - cluster1->GetZ() * nonBendingSlope); | |
334 | nonBendingImpactParamErr = TMath::Sqrt((z1 * z1 * cluster2->GetErrX2() + z2 * z2 * cluster1->GetErrX2()) / dZ / dZ + impactMCS2); | |
335 | if ((nonBendingImpactParam - sigmaCut * nonBendingImpactParamErr) > (3. * GetRecoParam()->GetNonBendingVertexDispersion())) continue; | |
336 | ||
337 | } | |
338 | ||
339 | // ------ track selection in bending direction ------ | |
340 | bendingSlope = (cluster1->GetY() - cluster2->GetY()) / dZ; | |
341 | if (AliMUONTrackExtrap::IsFieldON()) { // depending whether the field is ON or OFF | |
9f093251 | 342 | |
343 | // check if bending momentum is within tolerances | |
6b191dea | 344 | bendingImpactParam = cluster1->GetY() - cluster1->GetZ() * bendingSlope; |
345 | bendingImpactParamErr2 = (z1 * z1 * cluster2->GetErrY2() + z2 * z2 * cluster1->GetErrY2()) / dZ / dZ + impactMCS2; | |
346 | bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(bendingImpactParam)); | |
347 | bendingMomentumErr = TMath::Sqrt((bendingVertexDispersion2 + bendingImpactParamErr2) / | |
348 | bendingImpactParam / bendingImpactParam + 0.01) * bendingMomentum; | |
349 | if ((bendingMomentum + 3. * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) continue; | |
96ebe67e | 350 | |
9f093251 | 351 | } else { |
352 | ||
6b191dea | 353 | if (GetRecoParam()->SelectOnTrackSlope()) { |
354 | ||
355 | // check if bending slope is within tolerances | |
4663da9f | 356 | bendingSlopeErr = TMath::Sqrt((cluster1->GetErrY2() + cluster2->GetErrY2()) / dZ / dZ + angleMCS2); |
6b191dea | 357 | if ((TMath::Abs(bendingSlope) - sigmaCut * bendingSlopeErr) > GetRecoParam()->GetMaxBendingSlope()) continue; |
358 | ||
359 | } else { | |
360 | ||
361 | // or check if bending impact parameter is within tolerances | |
362 | bendingImpactParam = TMath::Abs(cluster1->GetY() - cluster1->GetZ() * bendingSlope); | |
363 | bendingImpactParamErr = TMath::Sqrt((z1 * z1 * cluster2->GetErrY2() + z2 * z2 * cluster1->GetErrY2()) / dZ / dZ + impactMCS2); | |
364 | if ((bendingImpactParam - sigmaCut * bendingImpactParamErr) > (3. * GetRecoParam()->GetBendingVertexDispersion())) continue; | |
365 | ||
366 | } | |
367 | ||
9f093251 | 368 | } |
6b191dea | 369 | |
9f093251 | 370 | // make new segment |
371 | segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(cluster1, cluster2, kFALSE, kFALSE); | |
372 | ||
373 | // Printout for debug | |
374 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
375 | cout << "segmentIndex(0...): " << segments->GetLast() << endl; | |
376 | segment->Dump(); | |
377 | cout << "Cluster in first chamber" << endl; | |
378 | cluster1->Print(); | |
379 | cout << "Cluster in second chamber" << endl; | |
380 | cluster2->Print(); | |
8d0843c6 | 381 | } |
96ebe67e | 382 | |
383 | } | |
384 | ||
385 | } | |
386 | ||
387 | // Printout for debug | |
9bf6860b | 388 | AliDebug(1,Form("chambers%d-%d: NSegments = %d ", ch1+1, ch2+1, segments->GetEntriesFast())); |
96ebe67e | 389 | |
208f139e | 390 | return segments; |
8d0843c6 | 391 | } |
392 | ||
89c8d66d | 393 | //__________________________________________________________________________ |
394 | void AliMUONVTrackReconstructor::RemoveUsedSegments(TClonesArray& segments) | |
395 | { | |
396 | /// To remove pairs of clusters already attached to a track | |
397 | AliDebug(1,"Enter RemoveUsedSegments"); | |
398 | Int_t nSegments = segments.GetEntriesFast(); | |
399 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
400 | AliMUONObjectPair *segment; | |
401 | AliMUONTrack *track; | |
402 | AliMUONVCluster *cluster, *cluster1, *cluster2; | |
403 | Bool_t foundCluster1, foundCluster2, removeSegment; | |
404 | ||
405 | // Loop over segments | |
406 | for (Int_t iSegment=0; iSegment<nSegments; iSegment++) { | |
407 | segment = (AliMUONObjectPair*) segments.UncheckedAt(iSegment); | |
408 | ||
409 | cluster1 = (AliMUONVCluster*) segment->First(); | |
410 | cluster2 = (AliMUONVCluster*) segment->Second(); | |
411 | removeSegment = kFALSE; | |
412 | ||
413 | // Loop over tracks | |
414 | for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) { | |
415 | track = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack); | |
416 | ||
417 | // skip empty slot | |
418 | if (!track) continue; | |
419 | ||
420 | foundCluster1 = kFALSE; | |
421 | foundCluster2 = kFALSE; | |
422 | ||
423 | // Loop over clusters | |
424 | Int_t nClusters = track->GetNClusters(); | |
425 | for (Int_t iCluster = 0; iCluster < nClusters; iCluster++) { | |
426 | cluster = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iCluster))->GetClusterPtr(); | |
427 | ||
428 | // check if both clusters are in that track | |
429 | if (cluster == cluster1) foundCluster1 = kTRUE; | |
430 | else if (cluster == cluster2) foundCluster2 = kTRUE; | |
431 | ||
432 | if (foundCluster1 && foundCluster2) { | |
433 | removeSegment = kTRUE; | |
434 | break; | |
435 | } | |
436 | ||
437 | } | |
438 | ||
439 | if (removeSegment) break; | |
440 | ||
441 | } | |
442 | ||
443 | if (removeSegment) segments.RemoveAt(iSegment); | |
444 | ||
445 | } | |
446 | ||
447 | segments.Compress(); | |
448 | ||
449 | // Printout for debug | |
450 | AliDebug(1,Form("NSegments = %d ", segments.GetEntriesFast())); | |
451 | } | |
452 | ||
ea94c18b | 453 | //__________________________________________________________________________ |
454 | void AliMUONVTrackReconstructor::RemoveIdenticalTracks() | |
455 | { | |
456 | /// To remove identical tracks: | |
96ebe67e | 457 | /// Tracks are considered identical if they have all their clusters in common. |
458 | /// One keeps the track with the larger number of clusters if need be | |
89c8d66d | 459 | AliMUONTrack *track1, *track2; |
460 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
96ebe67e | 461 | Int_t clustersInCommon, nClusters1, nClusters2; |
ea94c18b | 462 | // Loop over first track of the pair |
89c8d66d | 463 | for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) { |
464 | track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1); | |
465 | // skip empty slot | |
466 | if (!track1) continue; | |
96ebe67e | 467 | nClusters1 = track1->GetNClusters(); |
ea94c18b | 468 | // Loop over second track of the pair |
89c8d66d | 469 | for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) { |
470 | track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2); | |
471 | // skip empty slot | |
472 | if (!track2) continue; | |
96ebe67e | 473 | nClusters2 = track2->GetNClusters(); |
474 | // number of clusters in common between two tracks | |
475 | clustersInCommon = track1->ClustersInCommon(track2); | |
ea94c18b | 476 | // check for identical tracks |
96ebe67e | 477 | if ((clustersInCommon == nClusters1) || (clustersInCommon == nClusters2)) { |
ea94c18b | 478 | // decide which track to remove |
96ebe67e | 479 | if (nClusters2 > nClusters1) { |
ea94c18b | 480 | // remove track1 and continue the first loop with the track next to track1 |
89c8d66d | 481 | fRecTracksPtr->RemoveAt(iTrack1); |
ea94c18b | 482 | fNRecTracks--; |
ea94c18b | 483 | break; |
484 | } else { | |
485 | // remove track2 and continue the second loop with the track next to track2 | |
89c8d66d | 486 | fRecTracksPtr->RemoveAt(iTrack2); |
ea94c18b | 487 | fNRecTracks--; |
488 | } | |
89c8d66d | 489 | } |
ea94c18b | 490 | } // track2 |
ea94c18b | 491 | } // track1 |
89c8d66d | 492 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards |
ea94c18b | 493 | } |
494 | ||
495 | //__________________________________________________________________________ | |
496 | void AliMUONVTrackReconstructor::RemoveDoubleTracks() | |
497 | { | |
498 | /// To remove double tracks: | |
96ebe67e | 499 | /// Tracks are considered identical if more than half of the clusters of the track |
500 | /// which has the smaller number of clusters are in common with the other track. | |
501 | /// Among two identical tracks, one keeps the track with the larger number of clusters | |
ea94c18b | 502 | /// or, if these numbers are equal, the track with the minimum chi2. |
89c8d66d | 503 | AliMUONTrack *track1, *track2; |
504 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
505 | Int_t clustersInCommon2, nClusters1, nClusters2; | |
ea94c18b | 506 | // Loop over first track of the pair |
89c8d66d | 507 | for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) { |
508 | track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1); | |
509 | // skip empty slot | |
510 | if (!track1) continue; | |
96ebe67e | 511 | nClusters1 = track1->GetNClusters(); |
ea94c18b | 512 | // Loop over second track of the pair |
89c8d66d | 513 | for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) { |
514 | track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2); | |
515 | // skip empty slot | |
516 | if (!track2) continue; | |
96ebe67e | 517 | nClusters2 = track2->GetNClusters(); |
518 | // number of clusters in common between two tracks | |
89c8d66d | 519 | clustersInCommon2 = 2 * track1->ClustersInCommon(track2); |
ea94c18b | 520 | // check for identical tracks |
89c8d66d | 521 | if (clustersInCommon2 > nClusters1 || clustersInCommon2 > nClusters2) { |
ea94c18b | 522 | // decide which track to remove |
96ebe67e | 523 | if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) { |
ea94c18b | 524 | // remove track2 and continue the second loop with the track next to track2 |
89c8d66d | 525 | fRecTracksPtr->RemoveAt(iTrack2); |
c59f70b9 | 526 | fNRecTracks--; |
527 | } else { | |
528 | // else remove track1 and continue the first loop with the track next to track1 | |
89c8d66d | 529 | fRecTracksPtr->RemoveAt(iTrack1); |
c59f70b9 | 530 | fNRecTracks--; |
c59f70b9 | 531 | break; |
532 | } | |
89c8d66d | 533 | } |
c59f70b9 | 534 | } // track2 |
c59f70b9 | 535 | } // track1 |
89c8d66d | 536 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards |
c59f70b9 | 537 | } |
538 | ||
539 | //__________________________________________________________________________ | |
5c15a68b | 540 | void AliMUONVTrackReconstructor::RemoveConnectedTracks(Int_t stMin, Int_t stMax, Bool_t all) |
c59f70b9 | 541 | { |
5c15a68b | 542 | /// Find and remove tracks sharing 1 cluster or more in station(s) [stMin, stMax]. |
543 | /// For each couple of connected tracks, one removes the one with the smallest | |
544 | /// number of clusters or with the highest chi2 value in case of equality. | |
545 | /// If all=kTRUE: both tracks are removed. | |
546 | ||
547 | // tag the tracks to be removed | |
548 | TagConnectedTracks(stMin, stMax, all); | |
549 | ||
550 | // remove them | |
551 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
552 | for (Int_t i = 0; i < nTracks; i++) { | |
553 | if (((AliMUONTrack*) fRecTracksPtr->UncheckedAt(i))->IsConnected()) { | |
554 | fRecTracksPtr->RemoveAt(i); | |
555 | fNRecTracks--; | |
556 | } | |
557 | } | |
558 | ||
559 | // remove holes in the array if any | |
560 | fRecTracksPtr->Compress(); | |
561 | } | |
562 | ||
563 | //__________________________________________________________________________ | |
564 | void AliMUONVTrackReconstructor::TagConnectedTracks(Int_t stMin, Int_t stMax, Bool_t all) | |
565 | { | |
566 | /// Find and tag tracks sharing 1 cluster or more in station(s) [stMin, stMax]. | |
567 | /// For each couple of connected tracks, one tags the one with the smallest | |
568 | /// number of clusters or with the highest chi2 value in case of equality. | |
569 | /// If all=kTRUE: both tracks are tagged. | |
570 | ||
571 | AliMUONTrack *track1, *track2; | |
572 | Int_t nClusters1, nClusters2; | |
573 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
574 | ||
575 | // reset the tags | |
576 | for (Int_t i = 0; i < nTracks; i++) ((AliMUONTrack*) fRecTracksPtr->UncheckedAt(i))->Connected(kFALSE); | |
577 | ||
c59f70b9 | 578 | // Loop over first track of the pair |
5c15a68b | 579 | for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) { |
580 | track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1); | |
581 | ||
c59f70b9 | 582 | // Loop over second track of the pair |
5c15a68b | 583 | for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) { |
584 | track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2); | |
585 | ||
586 | // check for connected tracks and tag them | |
587 | if (track1->ClustersInCommon(track2, stMin, stMax) > 0) { | |
588 | ||
589 | if (all) { | |
590 | ||
591 | // tag both tracks | |
592 | track1->Connected(); | |
593 | track2->Connected(); | |
594 | ||
595 | } else { | |
596 | ||
597 | // tag only the worst track | |
598 | nClusters1 = track1->GetNClusters(); | |
599 | nClusters2 = track2->GetNClusters(); | |
600 | if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) { | |
601 | track2->Connected(); | |
602 | } else { | |
603 | track1->Connected(); | |
604 | } | |
605 | ||
606 | } | |
607 | ||
608 | } | |
609 | ||
610 | } | |
611 | ||
612 | } | |
613 | ||
ea94c18b | 614 | } |
615 | ||
1fef78c8 | 616 | //__________________________________________________________________________ |
9bf6860b | 617 | void AliMUONVTrackReconstructor::AskForNewClustersInChamber(const AliMUONTrackParam &trackParam, |
618 | AliMUONVClusterStore& clusterStore, Int_t chamber) | |
1fef78c8 | 619 | { |
620 | /// Ask the clustering to reconstruct new clusters around the track candidate position | |
1fef78c8 | 621 | |
9bf6860b | 622 | // check if the current chamber is useable |
a0dc65b4 | 623 | if (!fClusterServer || !GetRecoParam()->UseChamber(chamber)) return; |
1fef78c8 | 624 | |
9bf6860b | 625 | // maximum distance between the center of the chamber and a detection element |
626 | // (accounting for the inclination of the chamber) | |
b89ac3d6 | 627 | static const Double_t kMaxDZ = 15.; // 15 cm |
1fef78c8 | 628 | |
9bf6860b | 629 | // extrapolate track parameters to the chamber |
630 | AliMUONTrackParam extrapTrackParam(trackParam); | |
4ea3f013 | 631 | if (!AliMUONTrackExtrap::ExtrapToZCov(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(chamber))) return; |
9bf6860b | 632 | |
6b191dea | 633 | // build the searching area using the track and chamber resolutions and the maximum-distance-to-track value |
9bf6860b | 634 | const TMatrixD& kParamCov = extrapTrackParam.GetCovariances(); |
6b191dea | 635 | Double_t errX2 = kParamCov(0,0) + kMaxDZ * kMaxDZ * kParamCov(1,1) + 2. * kMaxDZ * TMath::Abs(kParamCov(0,1)) + |
636 | GetRecoParam()->GetDefaultNonBendingReso(chamber) * GetRecoParam()->GetDefaultNonBendingReso(chamber); | |
637 | Double_t errY2 = kParamCov(2,2) + kMaxDZ * kMaxDZ * kParamCov(3,3) + 2. * kMaxDZ * TMath::Abs(kParamCov(2,3)) + | |
638 | GetRecoParam()->GetDefaultBendingReso(chamber) * GetRecoParam()->GetDefaultBendingReso(chamber); | |
b89ac3d6 | 639 | Double_t dX = TMath::Abs(trackParam.GetNonBendingSlope()) * kMaxDZ + |
a0dc65b4 | 640 | GetRecoParam()->GetMaxNonBendingDistanceToTrack() + |
6b191dea | 641 | GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errX2); |
b89ac3d6 | 642 | Double_t dY = TMath::Abs(trackParam.GetBendingSlope()) * kMaxDZ + |
a0dc65b4 | 643 | GetRecoParam()->GetMaxBendingDistanceToTrack() + |
6b191dea | 644 | GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errY2); |
6e97fbb8 | 645 | AliMpArea area(extrapTrackParam.GetNonBendingCoor(), |
646 | extrapTrackParam.GetBendingCoor(), | |
647 | dX, dY); | |
1fef78c8 | 648 | |
649 | // ask to cluterize in the given area of the given chamber | |
35be7ed7 | 650 | fClusterServer->Clusterize(chamber, clusterStore, area, GetRecoParam()); |
1fef78c8 | 651 | |
9bf6860b | 652 | } |
653 | ||
654 | //__________________________________________________________________________ | |
655 | void AliMUONVTrackReconstructor::AskForNewClustersInStation(const AliMUONTrackParam &trackParam, | |
656 | AliMUONVClusterStore& clusterStore, Int_t station) | |
657 | { | |
658 | /// Ask the clustering to reconstruct new clusters around the track candidate position | |
659 | /// in the 2 chambers of the given station | |
660 | AskForNewClustersInChamber(trackParam, clusterStore, 2*station+1); | |
661 | AskForNewClustersInChamber(trackParam, clusterStore, 2*station); | |
1fef78c8 | 662 | } |
663 | ||
ea94c18b | 664 | //__________________________________________________________________________ |
96ebe67e | 665 | Double_t AliMUONVTrackReconstructor::TryOneCluster(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster, |
1fef78c8 | 666 | AliMUONTrackParam &trackParamAtCluster, Bool_t updatePropagator) |
ea94c18b | 667 | { |
96ebe67e | 668 | /// Test the compatibility between the track and the cluster (using trackParam's covariance matrix): |
ea94c18b | 669 | /// return the corresponding Chi2 |
96ebe67e | 670 | /// return trackParamAtCluster |
ea94c18b | 671 | |
96ebe67e | 672 | // extrapolate track parameters and covariances at the z position of the tested cluster |
4ea3f013 | 673 | // and set pointer to cluster into trackParamAtCluster |
96ebe67e | 674 | trackParamAtCluster = trackParam; |
96ebe67e | 675 | trackParamAtCluster.SetClusterPtr(cluster); |
4ea3f013 | 676 | if (!AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtCluster, cluster->GetZ(), updatePropagator)) |
677 | return 2.*AliMUONTrack::MaxChi2(); | |
ea94c18b | 678 | |
96ebe67e | 679 | // Set differences between trackParam and cluster in the bending and non bending directions |
680 | Double_t dX = cluster->GetX() - trackParamAtCluster.GetNonBendingCoor(); | |
681 | Double_t dY = cluster->GetY() - trackParamAtCluster.GetBendingCoor(); | |
ea94c18b | 682 | |
019df241 | 683 | // Calculate errors and covariances |
96ebe67e | 684 | const TMatrixD& kParamCov = trackParamAtCluster.GetCovariances(); |
685 | Double_t sigmaX2 = kParamCov(0,0) + cluster->GetErrX2(); | |
686 | Double_t sigmaY2 = kParamCov(2,2) + cluster->GetErrY2(); | |
6b191dea | 687 | Double_t covXY = kParamCov(0,2); |
688 | Double_t det = sigmaX2 * sigmaY2 - covXY * covXY; | |
019df241 | 689 | |
690 | // Compute chi2 | |
4ea3f013 | 691 | if (det == 0.) return 2.*AliMUONTrack::MaxChi2(); |
6b191dea | 692 | return (dX * dX * sigmaY2 + dY * dY * sigmaX2 - 2. * dX * dY * covXY) / det; |
019df241 | 693 | |
694 | } | |
695 | ||
696 | //__________________________________________________________________________ | |
5a240757 | 697 | Bool_t AliMUONVTrackReconstructor::TryOneClusterFast(const AliMUONTrackParam &trackParam, const AliMUONVCluster* cluster) |
019df241 | 698 | { |
9bf6860b | 699 | /// Test the compatibility between the track and the cluster |
6b191dea | 700 | /// given the track and cluster resolutions + the maximum-distance-to-track value |
9bf6860b | 701 | /// and assuming linear propagation of the track: |
019df241 | 702 | /// return kTRUE if they are compatibles |
703 | ||
96ebe67e | 704 | Double_t dZ = cluster->GetZ() - trackParam.GetZ(); |
705 | Double_t dX = cluster->GetX() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ); | |
706 | Double_t dY = cluster->GetY() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ); | |
9bf6860b | 707 | const TMatrixD& kParamCov = trackParam.GetCovariances(); |
6b191dea | 708 | Double_t errX2 = kParamCov(0,0) + dZ * dZ * kParamCov(1,1) + 2. * dZ * kParamCov(0,1) + cluster->GetErrX2(); |
709 | Double_t errY2 = kParamCov(2,2) + dZ * dZ * kParamCov(3,3) + 2. * dZ * kParamCov(2,3) + cluster->GetErrY2(); | |
9bf6860b | 710 | |
6b191dea | 711 | Double_t dXmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errX2) + |
a0dc65b4 | 712 | GetRecoParam()->GetMaxNonBendingDistanceToTrack(); |
6b191dea | 713 | Double_t dYmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errY2) + |
a0dc65b4 | 714 | GetRecoParam()->GetMaxBendingDistanceToTrack(); |
019df241 | 715 | |
9bf6860b | 716 | if (TMath::Abs(dX) > dXmax || TMath::Abs(dY) > dYmax) return kFALSE; |
019df241 | 717 | |
718 | return kTRUE; | |
719 | ||
720 | } | |
721 | ||
722 | //__________________________________________________________________________ | |
96ebe67e | 723 | Double_t AliMUONVTrackReconstructor::TryTwoClustersFast(const AliMUONTrackParam &trackParamAtCluster1, AliMUONVCluster* cluster2, |
724 | AliMUONTrackParam &trackParamAtCluster2) | |
019df241 | 725 | { |
96ebe67e | 726 | /// Test the compatibility between the track and the 2 clusters together (using trackParam's covariance matrix) |
727 | /// assuming linear propagation between the two clusters: | |
728 | /// return the corresponding Chi2 accounting for covariances between the 2 clusters | |
729 | /// return trackParamAtCluster2 | |
019df241 | 730 | |
96ebe67e | 731 | // extrapolate linearly track parameters and covariances at the z position of the second cluster |
732 | trackParamAtCluster2 = trackParamAtCluster1; | |
3fe6651e | 733 | AliMUONTrackExtrap::LinearExtrapToZCov(&trackParamAtCluster2, cluster2->GetZ()); |
019df241 | 734 | |
96ebe67e | 735 | // set pointer to cluster2 into trackParamAtCluster2 |
736 | trackParamAtCluster2.SetClusterPtr(cluster2); | |
019df241 | 737 | |
96ebe67e | 738 | // Set differences between track and clusters in the bending and non bending directions |
739 | AliMUONVCluster* cluster1 = trackParamAtCluster1.GetClusterPtr(); | |
740 | Double_t dX1 = cluster1->GetX() - trackParamAtCluster1.GetNonBendingCoor(); | |
741 | Double_t dX2 = cluster2->GetX() - trackParamAtCluster2.GetNonBendingCoor(); | |
742 | Double_t dY1 = cluster1->GetY() - trackParamAtCluster1.GetBendingCoor(); | |
743 | Double_t dY2 = cluster2->GetY() - trackParamAtCluster2.GetBendingCoor(); | |
019df241 | 744 | |
745 | // Calculate errors and covariances | |
96ebe67e | 746 | const TMatrixD& kParamCov1 = trackParamAtCluster1.GetCovariances(); |
747 | const TMatrixD& kParamCov2 = trackParamAtCluster2.GetCovariances(); | |
748 | Double_t dZ = trackParamAtCluster2.GetZ() - trackParamAtCluster1.GetZ(); | |
749 | Double_t sigma2X1 = kParamCov1(0,0) + cluster1->GetErrX2(); | |
750 | Double_t sigma2X2 = kParamCov2(0,0) + cluster2->GetErrX2(); | |
019df241 | 751 | Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1); |
96ebe67e | 752 | Double_t sigma2Y1 = kParamCov1(2,2) + cluster1->GetErrY2(); |
753 | Double_t sigma2Y2 = kParamCov2(2,2) + cluster2->GetErrY2(); | |
019df241 | 754 | Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3); |
755 | ||
756 | // Compute chi2 | |
757 | Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2; | |
758 | Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2; | |
4ea3f013 | 759 | if (detX == 0. || detY == 0.) return 2.*AliMUONTrack::MaxChi2(); |
019df241 | 760 | return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX |
761 | + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY; | |
762 | ||
763 | } | |
764 | ||
765 | //__________________________________________________________________________ | |
9bf6860b | 766 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInChamber(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore, |
767 | Int_t nextChamber) | |
768 | { | |
769 | /// Follow trackCandidate in chamber(0..) nextChamber assuming linear propagation, and search for compatible cluster(s) | |
770 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: | |
771 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
772 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
773 | /// Remove the obsolete "trackCandidate" at the end. | |
774 | /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority. | |
775 | /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE) | |
776 | AliDebug(1,Form("Enter FollowLinearTrackInChamber(1..) %d", nextChamber+1)); | |
777 | ||
4ea3f013 | 778 | Double_t chi2WithOneCluster = AliMUONTrack::MaxChi2(); |
a0dc65b4 | 779 | Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() * |
780 | GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2 | |
9bf6860b | 781 | Double_t bestChi2WithOneCluster = maxChi2WithOneCluster; |
782 | Bool_t foundOneCluster = kFALSE; | |
783 | AliMUONTrack *newTrack = 0x0; | |
784 | AliMUONVCluster *cluster; | |
785 | AliMUONTrackParam trackParam; | |
786 | AliMUONTrackParam extrapTrackParamAtCluster; | |
787 | AliMUONTrackParam bestTrackParamAtCluster; | |
788 | ||
789 | // Get track parameters according to the propagation direction | |
790 | if (nextChamber > 7) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last(); | |
791 | else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First(); | |
792 | ||
793 | // Printout for debuging | |
794 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) { | |
795 | cout<<endl<<"Track parameters and covariances at first cluster:"<<endl; | |
796 | trackParam.GetParameters().Print(); | |
797 | trackParam.GetCovariances().Print(); | |
798 | } | |
799 | ||
800 | // Add MCS effect | |
4663da9f | 801 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(trackParam.GetClusterPtr()->GetChamberId()),-1.); |
9bf6860b | 802 | |
803 | // Printout for debuging | |
804 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
805 | cout << "FollowLinearTrackInChamber: look for cluster in chamber(1..): " << nextChamber+1 << endl; | |
806 | } | |
807 | ||
808 | // Create iterators to loop over clusters in chamber | |
809 | TIter next(clusterStore.CreateChamberIterator(nextChamber,nextChamber)); | |
810 | ||
811 | // look for candidates in chamber | |
812 | while ( ( cluster = static_cast<AliMUONVCluster*>(next()) ) ) { | |
813 | ||
814 | // try to add the current cluster fast | |
815 | if (!TryOneClusterFast(trackParam, cluster)) continue; | |
816 | ||
817 | // try to add the current cluster accuratly | |
818 | extrapTrackParamAtCluster = trackParam; | |
3fe6651e | 819 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster, cluster->GetZ()); |
9bf6860b | 820 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster, cluster, extrapTrackParamAtCluster); |
821 | ||
822 | // if good chi2 then consider to add cluster | |
823 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
824 | foundOneCluster = kTRUE; | |
825 | ||
826 | // Printout for debuging | |
827 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
828 | cout << "FollowLinearTrackInChamber: found one cluster in chamber(1..): " << nextChamber+1 | |
829 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
830 | cluster->Print(); | |
831 | } | |
832 | ||
a0dc65b4 | 833 | if (GetRecoParam()->TrackAllTracks()) { |
9bf6860b | 834 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
835 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
a0dc65b4 | 836 | if (GetRecoParam()->RequestStation(nextChamber/2)) |
9bf6860b | 837 | extrapTrackParamAtCluster.SetRemovable(kFALSE); |
838 | else extrapTrackParamAtCluster.SetRemovable(kTRUE); | |
839 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster,*cluster); | |
89c8d66d | 840 | newTrack->SetGlobalChi2(trackCandidate.GetGlobalChi2()+chi2WithOneCluster); |
9bf6860b | 841 | fNRecTracks++; |
842 | ||
843 | // Printout for debuging | |
844 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
845 | cout << "FollowLinearTrackInChamber: added one cluster in chamber(1..): " << nextChamber+1 << endl; | |
846 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
847 | } | |
848 | ||
849 | } else if (chi2WithOneCluster < bestChi2WithOneCluster) { | |
850 | // keep track of the best cluster | |
851 | bestChi2WithOneCluster = chi2WithOneCluster; | |
852 | bestTrackParamAtCluster = extrapTrackParamAtCluster; | |
853 | } | |
854 | ||
855 | } | |
856 | ||
857 | } | |
858 | ||
859 | // fill out the best track if required else clean up the fRecTracksPtr array | |
a0dc65b4 | 860 | if (!GetRecoParam()->TrackAllTracks()) { |
9bf6860b | 861 | if (foundOneCluster) { |
a0dc65b4 | 862 | if (GetRecoParam()->RequestStation(nextChamber/2)) |
9bf6860b | 863 | bestTrackParamAtCluster.SetRemovable(kFALSE); |
864 | else bestTrackParamAtCluster.SetRemovable(kTRUE); | |
865 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster,*(bestTrackParamAtCluster.GetClusterPtr())); | |
89c8d66d | 866 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithOneCluster); |
9bf6860b | 867 | |
868 | // Printout for debuging | |
869 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
870 | cout << "FollowLinearTrackInChamber: added the best cluster in chamber(1..): " << bestTrackParamAtCluster.GetClusterPtr()->GetChamberId()+1 << endl; | |
871 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
872 | } | |
873 | ||
874 | } else return kFALSE; | |
875 | ||
876 | } else if (foundOneCluster) { | |
877 | ||
878 | // remove obsolete track | |
879 | fRecTracksPtr->Remove(&trackCandidate); | |
880 | fNRecTracks--; | |
881 | ||
882 | } else return kFALSE; | |
883 | ||
884 | return kTRUE; | |
885 | ||
886 | } | |
887 | ||
888 | //__________________________________________________________________________ | |
96ebe67e | 889 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore, |
890 | Int_t nextStation) | |
019df241 | 891 | { |
96ebe67e | 892 | /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible cluster(s) |
019df241 | 893 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: |
894 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
895 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
896 | /// Remove the obsolete "trackCandidate" at the end. | |
96ebe67e | 897 | /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority. |
898 | /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE) | |
019df241 | 899 | AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1)); |
900 | ||
901 | // Order the chamber according to the propagation direction (tracking starts with chamber 2): | |
902 | // - nextStation == station(1...) 5 => forward propagation | |
903 | // - nextStation < station(1...) 5 => backward propagation | |
904 | Int_t ch1, ch2; | |
905 | if (nextStation==4) { | |
906 | ch1 = 2*nextStation+1; | |
907 | ch2 = 2*nextStation; | |
ea94c18b | 908 | } else { |
019df241 | 909 | ch1 = 2*nextStation; |
910 | ch2 = 2*nextStation+1; | |
ea94c18b | 911 | } |
912 | ||
4ea3f013 | 913 | Double_t chi2WithOneCluster = AliMUONTrack::MaxChi2(); |
914 | Double_t chi2WithTwoClusters = AliMUONTrack::MaxChi2(); | |
a0dc65b4 | 915 | Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() * |
916 | GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2 | |
917 | Double_t maxChi2WithTwoClusters = 4. * GetRecoParam()->GetSigmaCutForTracking() * | |
918 | GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2 | |
96ebe67e | 919 | Double_t bestChi2WithOneCluster = maxChi2WithOneCluster; |
920 | Double_t bestChi2WithTwoClusters = maxChi2WithTwoClusters; | |
921 | Bool_t foundOneCluster = kFALSE; | |
922 | Bool_t foundTwoClusters = kFALSE; | |
019df241 | 923 | AliMUONTrack *newTrack = 0x0; |
96ebe67e | 924 | AliMUONVCluster *clusterCh1, *clusterCh2; |
7332f213 | 925 | AliMUONTrackParam trackParam; |
96ebe67e | 926 | AliMUONTrackParam extrapTrackParamAtCluster1; |
927 | AliMUONTrackParam extrapTrackParamAtCluster2; | |
928 | AliMUONTrackParam bestTrackParamAtCluster1; | |
929 | AliMUONTrackParam bestTrackParamAtCluster2; | |
930 | ||
931 | Int_t nClusters = clusterStore.GetSize(); | |
932 | Bool_t *clusterCh1Used = new Bool_t[nClusters]; | |
933 | for (Int_t i = 0; i < nClusters; i++) clusterCh1Used[i] = kFALSE; | |
934 | Int_t iCluster1; | |
019df241 | 935 | |
7332f213 | 936 | // Get track parameters according to the propagation direction |
937 | if (nextStation==4) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last(); | |
938 | else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First(); | |
019df241 | 939 | |
9bf6860b | 940 | // Printout for debuging |
941 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) { | |
942 | cout<<endl<<"Track parameters and covariances at first cluster:"<<endl; | |
943 | trackParam.GetParameters().Print(); | |
944 | trackParam.GetCovariances().Print(); | |
945 | } | |
946 | ||
019df241 | 947 | // Add MCS effect |
4663da9f | 948 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(trackParam.GetClusterPtr()->GetChamberId()),-1.); |
019df241 | 949 | |
950 | // Printout for debuging | |
951 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 952 | cout << "FollowLinearTrackInStation: look for clusters in chamber(1..): " << ch2+1 << endl; |
019df241 | 953 | } |
954 | ||
96ebe67e | 955 | // Create iterators to loop over clusters in both chambers |
956 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
957 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
958 | ||
959 | // look for candidates in chamber 2 | |
960 | while ( ( clusterCh2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
019df241 | 961 | |
96ebe67e | 962 | // try to add the current cluster fast |
963 | if (!TryOneClusterFast(trackParam, clusterCh2)) continue; | |
019df241 | 964 | |
96ebe67e | 965 | // try to add the current cluster accuratly |
966 | extrapTrackParamAtCluster2 = trackParam; | |
3fe6651e | 967 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster2, clusterCh2->GetZ()); |
96ebe67e | 968 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster2, clusterCh2, extrapTrackParamAtCluster2); |
019df241 | 969 | |
96ebe67e | 970 | // if good chi2 then try to attach a cluster in the other chamber too |
971 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
972 | Bool_t foundSecondCluster = kFALSE; | |
019df241 | 973 | |
974 | // Printout for debuging | |
975 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 976 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch2+1 |
977 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
9bf6860b | 978 | clusterCh2->Print(); |
96ebe67e | 979 | cout << " look for second clusters in chamber(1..): " << ch1+1 << " ..." << endl; |
019df241 | 980 | } |
981 | ||
982 | // add MCS effect | |
4663da9f | 983 | AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtCluster2,AliMUONConstants::ChamberThicknessInX0(ch2),-1.); |
019df241 | 984 | |
96ebe67e | 985 | // reset cluster iterator of chamber 1 |
986 | nextInCh1.Reset(); | |
987 | iCluster1 = -1; | |
988 | ||
989 | // look for second candidates in chamber 1 | |
990 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
991 | iCluster1++; | |
019df241 | 992 | |
96ebe67e | 993 | // try to add the current cluster fast |
994 | if (!TryOneClusterFast(extrapTrackParamAtCluster2, clusterCh1)) continue; | |
019df241 | 995 | |
96ebe67e | 996 | // try to add the current cluster in addition to the one found in the previous chamber |
997 | chi2WithTwoClusters = TryTwoClustersFast(extrapTrackParamAtCluster2, clusterCh1, extrapTrackParamAtCluster1); | |
019df241 | 998 | |
96ebe67e | 999 | // if good chi2 then consider to add the 2 clusters to the "trackCandidate" |
1000 | if (chi2WithTwoClusters < maxChi2WithTwoClusters) { | |
1001 | foundSecondCluster = kTRUE; | |
1002 | foundTwoClusters = kTRUE; | |
019df241 | 1003 | |
1004 | // Printout for debuging | |
1005 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1006 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 |
9bf6860b | 1007 | << " (Chi2 = " << chi2WithTwoClusters << ")" << endl; |
1008 | clusterCh1->Print(); | |
019df241 | 1009 | } |
1010 | ||
a0dc65b4 | 1011 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1012 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new clusters |
019df241 | 1013 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
96ebe67e | 1014 | extrapTrackParamAtCluster1.SetRemovable(kTRUE); |
1015 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); | |
1016 | extrapTrackParamAtCluster2.SetRemovable(kTRUE); | |
1017 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); | |
89c8d66d | 1018 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithTwoClusters); |
019df241 | 1019 | fNRecTracks++; |
1020 | ||
96ebe67e | 1021 | // Tag clusterCh1 as used |
1022 | clusterCh1Used[iCluster1] = kTRUE; | |
019df241 | 1023 | |
1024 | // Printout for debuging | |
1025 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1026 | cout << "FollowLinearTrackInStation: added two clusters in station(1..): " << nextStation+1 << endl; |
019df241 | 1027 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1028 | } | |
1029 | ||
96ebe67e | 1030 | } else if (chi2WithTwoClusters < bestChi2WithTwoClusters) { |
1031 | // keep track of the best couple of clusters | |
1032 | bestChi2WithTwoClusters = chi2WithTwoClusters; | |
1033 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
1034 | bestTrackParamAtCluster2 = extrapTrackParamAtCluster2; | |
019df241 | 1035 | } |
1036 | ||
1037 | } | |
1038 | ||
1039 | } | |
1040 | ||
96ebe67e | 1041 | // if no cluster found in chamber1 then consider to add clusterCh2 only |
1042 | if (!foundSecondCluster) { | |
1043 | foundOneCluster = kTRUE; | |
019df241 | 1044 | |
a0dc65b4 | 1045 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1046 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
019df241 | 1047 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
a0dc65b4 | 1048 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1049 | extrapTrackParamAtCluster2.SetRemovable(kFALSE); |
1050 | else extrapTrackParamAtCluster2.SetRemovable(kTRUE); | |
96ebe67e | 1051 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); |
89c8d66d | 1052 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithOneCluster); |
019df241 | 1053 | fNRecTracks++; |
1054 | ||
1055 | // Printout for debuging | |
1056 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1057 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch2+1 << endl; |
019df241 | 1058 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1059 | } | |
1060 | ||
96ebe67e | 1061 | } else if (!foundTwoClusters && chi2WithOneCluster < bestChi2WithOneCluster) { |
1062 | // keep track of the best cluster except if a couple of clusters has already been found | |
1063 | bestChi2WithOneCluster = chi2WithOneCluster; | |
1064 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster2; | |
019df241 | 1065 | } |
1066 | ||
1067 | } | |
1068 | ||
1069 | } | |
1070 | ||
1071 | } | |
1072 | ||
1073 | // look for candidates in chamber 1 not already attached to a track | |
96ebe67e | 1074 | // if we want to keep all possible tracks or if no good couple of clusters has been found |
a0dc65b4 | 1075 | if (GetRecoParam()->TrackAllTracks() || !foundTwoClusters) { |
019df241 | 1076 | |
1077 | // Printout for debuging | |
1078 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1079 | cout << "FollowLinearTrackInStation: look for single cluster in chamber(1..): " << ch1+1 << endl; |
019df241 | 1080 | } |
1081 | ||
1082 | //Extrapolate trackCandidate to chamber "ch2" | |
3fe6651e | 1083 | AliMUONTrackExtrap::LinearExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(ch2)); |
019df241 | 1084 | |
1085 | // add MCS effect for next step | |
4663da9f | 1086 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(ch2),-1.); |
9bf6860b | 1087 | |
96ebe67e | 1088 | // reset cluster iterator of chamber 1 |
1089 | nextInCh1.Reset(); | |
1090 | iCluster1 = -1; | |
1091 | ||
1092 | // look for second candidates in chamber 1 | |
1093 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
1094 | iCluster1++; | |
019df241 | 1095 | |
96ebe67e | 1096 | if (clusterCh1Used[iCluster1]) continue; // Skip clusters already used |
019df241 | 1097 | |
96ebe67e | 1098 | // try to add the current cluster fast |
1099 | if (!TryOneClusterFast(trackParam, clusterCh1)) continue; | |
9bf6860b | 1100 | |
96ebe67e | 1101 | // try to add the current cluster accuratly |
1102 | extrapTrackParamAtCluster1 = trackParam; | |
3fe6651e | 1103 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster1, clusterCh1->GetZ()); |
96ebe67e | 1104 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster1, clusterCh1, extrapTrackParamAtCluster1); |
9bf6860b | 1105 | |
96ebe67e | 1106 | // if good chi2 then consider to add clusterCh1 |
1107 | // We do not try to attach a cluster in the other chamber too since it has already been done above | |
1108 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
1109 | foundOneCluster = kTRUE; | |
019df241 | 1110 | |
1111 | // Printout for debuging | |
1112 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1113 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 |
1114 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
9bf6860b | 1115 | clusterCh1->Print(); |
019df241 | 1116 | } |
1117 | ||
a0dc65b4 | 1118 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1119 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
019df241 | 1120 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
a0dc65b4 | 1121 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1122 | extrapTrackParamAtCluster1.SetRemovable(kFALSE); |
1123 | else extrapTrackParamAtCluster1.SetRemovable(kTRUE); | |
96ebe67e | 1124 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); |
89c8d66d | 1125 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithOneCluster); |
019df241 | 1126 | fNRecTracks++; |
1127 | ||
1128 | // Printout for debuging | |
1129 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1130 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch1+1 << endl; |
019df241 | 1131 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1132 | } | |
1133 | ||
96ebe67e | 1134 | } else if (chi2WithOneCluster < bestChi2WithOneCluster) { |
1135 | // keep track of the best cluster except if a couple of clusters has already been found | |
1136 | bestChi2WithOneCluster = chi2WithOneCluster; | |
1137 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
019df241 | 1138 | } |
1139 | ||
1140 | } | |
1141 | ||
1142 | } | |
1143 | ||
1144 | } | |
1145 | ||
1146 | // fill out the best track if required else clean up the fRecTracksPtr array | |
a0dc65b4 | 1147 | if (!GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1148 | if (foundTwoClusters) { |
1149 | bestTrackParamAtCluster1.SetRemovable(kTRUE); | |
1150 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); | |
1151 | bestTrackParamAtCluster2.SetRemovable(kTRUE); | |
1152 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster2,*(bestTrackParamAtCluster2.GetClusterPtr())); | |
89c8d66d | 1153 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithTwoClusters); |
019df241 | 1154 | |
1155 | // Printout for debuging | |
1156 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1157 | cout << "FollowLinearTrackInStation: added the two best clusters in station(1..): " << nextStation+1 << endl; |
019df241 | 1158 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1159 | } | |
1160 | ||
96ebe67e | 1161 | } else if (foundOneCluster) { |
a0dc65b4 | 1162 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1163 | bestTrackParamAtCluster1.SetRemovable(kFALSE); |
1164 | else bestTrackParamAtCluster1.SetRemovable(kTRUE); | |
96ebe67e | 1165 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); |
89c8d66d | 1166 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithOneCluster); |
019df241 | 1167 | |
1168 | // Printout for debuging | |
1169 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1170 | cout << "FollowLinearTrackInStation: added the best cluster in chamber(1..): " << bestTrackParamAtCluster1.GetClusterPtr()->GetChamberId()+1 << endl; |
019df241 | 1171 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1172 | } | |
1173 | ||
dd230855 | 1174 | } else { |
96ebe67e | 1175 | delete [] clusterCh1Used; |
dd230855 | 1176 | return kFALSE; |
1177 | } | |
019df241 | 1178 | |
96ebe67e | 1179 | } else if (foundOneCluster || foundTwoClusters) { |
019df241 | 1180 | |
1181 | // remove obsolete track | |
1182 | fRecTracksPtr->Remove(&trackCandidate); | |
1183 | fNRecTracks--; | |
1184 | ||
dd230855 | 1185 | } else { |
96ebe67e | 1186 | delete [] clusterCh1Used; |
dd230855 | 1187 | return kFALSE; |
1188 | } | |
ea94c18b | 1189 | |
96ebe67e | 1190 | delete [] clusterCh1Used; |
019df241 | 1191 | return kTRUE; |
ea94c18b | 1192 | |
1193 | } | |
1194 | ||
7332f213 | 1195 | //__________________________________________________________________________ |
1196 | void AliMUONVTrackReconstructor::ImproveTracks() | |
1197 | { | |
1198 | /// Improve tracks by removing clusters with local chi2 highter than the defined cut | |
1199 | /// Recompute track parameters and covariances at the remaining clusters | |
1200 | AliDebug(1,"Enter ImproveTracks"); | |
1201 | ||
1202 | AliMUONTrack *track, *nextTrack; | |
1203 | ||
7332f213 | 1204 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
1205 | while (track) { | |
1206 | ||
1207 | // prepare next track in case the actual track is suppressed | |
1208 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); | |
1209 | ||
1210 | ImproveTrack(*track); | |
1211 | ||
1212 | // remove track if improvement failed | |
1213 | if (!track->IsImproved()) { | |
1214 | fRecTracksPtr->Remove(track); | |
1215 | fNRecTracks--; | |
1216 | } | |
1217 | ||
1218 | track = nextTrack; | |
1219 | } | |
1220 | ||
1221 | // compress the array in case of some tracks have been removed | |
1222 | fRecTracksPtr->Compress(); | |
1223 | ||
1224 | } | |
1225 | ||
1226 | //__________________________________________________________________________ | |
1227 | void AliMUONVTrackReconstructor::Finalize() | |
1228 | { | |
5c15a68b | 1229 | /// Recompute track parameters and covariances at each attached cluster |
2e2d0c44 | 1230 | /// Set the label pointing to the corresponding MC track |
4ea3f013 | 1231 | /// Remove the track if finalization failed |
7332f213 | 1232 | |
4ea3f013 | 1233 | AliMUONTrack *track, *nextTrack; |
1234 | Bool_t trackRemoved = kFALSE; | |
7332f213 | 1235 | |
1236 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
1237 | while (track) { | |
1238 | ||
4ea3f013 | 1239 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); |
7332f213 | 1240 | |
4ea3f013 | 1241 | if (FinalizeTrack(*track)) track->FindMCLabel(); |
1242 | else { | |
1243 | fRecTracksPtr->Remove(track); | |
1244 | fNRecTracks--; | |
1245 | trackRemoved = kTRUE; | |
1246 | } | |
2e2d0c44 | 1247 | |
4ea3f013 | 1248 | track = nextTrack; |
7332f213 | 1249 | |
1250 | } | |
1251 | ||
4ea3f013 | 1252 | // compress array of tracks if needed |
1253 | if (trackRemoved) fRecTracksPtr->Compress(); | |
1254 | ||
7332f213 | 1255 | } |
1256 | ||
1257 | //__________________________________________________________________________ | |
7ec3b9cf | 1258 | void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore, |
1259 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
1260 | const AliMUONVTriggerStore& triggerStore, | |
1261 | const AliMUONTrackHitPattern& trackHitPattern) | |
8d0843c6 | 1262 | { |
1263 | /// Try to match track from tracking system with trigger track | |
99c136e1 | 1264 | AliCodeTimerAuto("",0); |
fda59e58 | 1265 | |
683cb6c5 | 1266 | trackHitPattern.ExecuteValidation(trackStore, triggerTrackStore, triggerStore); |
8d0843c6 | 1267 | } |
1268 | ||
9f164762 | 1269 | |
1270 | //__________________________________________________________________________ | |
ea94c18b | 1271 | void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit, |
1272 | const AliMUONVTriggerStore& triggerStore, | |
1273 | AliMUONVTriggerTrackStore& triggerTrackStore) | |
8d0843c6 | 1274 | { |
9f164762 | 1275 | /// Fill trigger track store from local trigger |
7ec3b9cf | 1276 | AliDebug(1, ""); |
99c136e1 | 1277 | AliCodeTimerAuto("",0); |
bdfb6eef | 1278 | |
7ec3b9cf | 1279 | AliMUONGlobalTrigger* globalTrigger = triggerStore.Global(); |
e6b25a6e | 1280 | |
7ec3b9cf | 1281 | UChar_t gloTrigPat = 0; |
e6b25a6e | 1282 | |
7ec3b9cf | 1283 | if (globalTrigger) |
1284 | { | |
1285 | gloTrigPat = globalTrigger->GetGlobalResponse(); | |
e6b25a6e | 1286 | } |
1287 | ||
9f164762 | 1288 | AliMUONTriggerTrack triggerTrack; |
1289 | ||
7ec3b9cf | 1290 | TIter next(triggerStore.CreateIterator()); |
1291 | AliMUONLocalTrigger* locTrg(0x0); | |
7ec3b9cf | 1292 | |
1293 | while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) ) | |
1294 | { | |
bdfb6eef | 1295 | if ( locTrg->IsTrigX() && locTrg->IsTrigY() ) |
7ec3b9cf | 1296 | { // make Trigger Track if trigger in X and Y |
7ec3b9cf | 1297 | |
9f164762 | 1298 | TriggerToTrack(circuit, *locTrg, triggerTrack, gloTrigPat); |
bdfb6eef | 1299 | |
7ec3b9cf | 1300 | triggerTrackStore.Add(triggerTrack); |
1301 | } // board is fired | |
e6b25a6e | 1302 | } // end of loop on Local Trigger |
8d0843c6 | 1303 | } |
9f164762 | 1304 | |
1305 | //__________________________________________________________________________ | |
1306 | void AliMUONVTrackReconstructor::TriggerToTrack(const AliMUONTriggerCircuit& circuit, | |
1307 | const AliMUONLocalTrigger& locTrg, | |
1308 | AliMUONTriggerTrack& triggerTrack, | |
1309 | UChar_t globalTriggerPattern) | |
1310 | { | |
1311 | /// To make the trigger tracks from Local Trigger | |
1312 | const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso(); | |
1313 | const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso(); | |
1314 | const Double_t kSqrt12 = TMath::Sqrt(12.); | |
1315 | ||
1316 | TMatrixD trigCov(3,3); | |
1317 | ||
1318 | Int_t localBoardId = locTrg.LoCircuit(); | |
1319 | ||
1320 | Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg.LoStripX()); | |
1321 | Float_t z11 = circuit.GetZ11Pos(localBoardId, locTrg.LoStripX()); | |
1322 | // need first to convert deviation to [0-30] | |
1323 | // (see AliMUONLocalTriggerBoard::LocalTrigger) | |
1324 | Int_t deviation = locTrg.GetDeviation(); | |
1325 | Int_t stripX21 = locTrg.LoStripX()+deviation+1; | |
1326 | Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21); | |
1327 | Float_t z21 = circuit.GetZ21Pos(localBoardId, stripX21); | |
1328 | Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg.LoStripY()); | |
1329 | ||
1330 | AliDebug(1, Form(" MakeTriggerTrack %3d %2d %2d %2d (%f %f %f) (%f %f)\n",locTrg.LoCircuit(), | |
1331 | locTrg.LoStripX(),locTrg.LoStripX()+deviation+1,locTrg.LoStripY(),x11, y11, z11, y21, z21)); | |
1332 | ||
1333 | Double_t deltaZ = z11 - z21; | |
1334 | ||
1335 | Float_t slopeX = x11/z11; | |
1336 | Float_t slopeY = (y11-y21) / deltaZ; | |
1337 | ||
1338 | Float_t sigmaX = circuit.GetX11Width(localBoardId, locTrg.LoStripY()) / kSqrt12; | |
1339 | Float_t sigmaY = circuit.GetY11Width(localBoardId, locTrg.LoStripX()) / kSqrt12; | |
1340 | Float_t sigmaY21 = circuit.GetY21Width(localBoardId, locTrg.LoStripX()) / kSqrt12; | |
1341 | ||
1342 | trigCov.Zero(); | |
1343 | trigCov(0,0) = kTrigNonBendReso * kTrigNonBendReso + sigmaX * sigmaX; | |
1344 | trigCov(1,1) = kTrigBendReso * kTrigBendReso + sigmaY * sigmaY; | |
1345 | trigCov(2,2) = | |
1346 | (2. * kTrigBendReso * kTrigBendReso + sigmaY * sigmaY + sigmaY21 * sigmaY21 ) / deltaZ / deltaZ; | |
1347 | trigCov(1,2) = trigCov(2,1) = trigCov(1,1) / deltaZ; | |
1348 | ||
1349 | triggerTrack.SetX11(x11); | |
1350 | triggerTrack.SetY11(y11); | |
1351 | triggerTrack.SetZ11(z11); | |
1352 | triggerTrack.SetZ21(z21); | |
1353 | triggerTrack.SetSlopeX(slopeX); | |
1354 | triggerTrack.SetSlopeY(slopeY); | |
1355 | triggerTrack.SetGTPattern(globalTriggerPattern); | |
1356 | triggerTrack.SetLoTrgNum(localBoardId); | |
1357 | triggerTrack.SetCovariances(trigCov); | |
1358 | triggerTrack.SetUniqueID(locTrg.GetUniqueID()); | |
1359 | } |