1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 //-----------------------------------------------------------------------------
19 /// \class AliMUONVTrackReconstructor
20 /// Virtual MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor)
22 /// This class contains as data a pointer to the array of reconstructed tracks
24 /// It contains as methods, among others:
25 /// * EventReconstruct to build the muon tracks
26 /// * EventReconstructTrigger to build the trigger tracks
27 /// * ValidateTracksWithTrigger to match tracker/trigger tracks
29 /// Several options and adjustable parameters are available for both KALMAN and ORIGINAL
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)
34 /// Main parameters and options are:
35 /// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be
36 /// attached to the track candidate and to select good tracks.
37 /// - *fgkMakeTrackCandidatesFast* : if this flag is set to 'true', the track candidates
38 /// are made assuming linear propagation between stations 4 and 5.
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
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
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).
52 /// - *fgkSigmaToCutForImprovement* : quality cut used when we try to improve the
53 /// quality of the tracks.
55 /// \author Philippe Pillot
56 //-----------------------------------------------------------------------------
58 #include "AliMUONVTrackReconstructor.h"
60 #include "AliMUONConstants.h"
61 #include "AliMUONObjectPair.h"
62 #include "AliMUONTriggerTrack.h"
63 #include "AliMUONTriggerCircuit.h"
64 #include "AliMUONLocalTrigger.h"
65 #include "AliMUONGlobalTrigger.h"
66 #include "AliMUONTrack.h"
67 #include "AliMUONTrackParam.h"
68 #include "AliMUONTrackExtrap.h"
69 #include "AliMUONTrackHitPattern.h"
70 #include "AliMUONVTrackStore.h"
71 #include "AliMUONVClusterStore.h"
72 #include "AliMUONVCluster.h"
73 #include "AliMUONVClusterServer.h"
74 #include "AliMUONVTriggerStore.h"
75 #include "AliMUONVTriggerTrackStore.h"
76 #include "AliMpDEManager.h"
77 #include "AliMpArea.h"
80 #include "AliCodeTimer.h"
81 #include "AliTracker.h"
83 #include <TClonesArray.h>
88 #include <Riostream.h>
91 ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context
94 //__________________________________________________________________________
95 AliMUONVTrackReconstructor::AliMUONVTrackReconstructor(const AliMUONRecoParam* recoParam,
96 AliMUONVClusterServer* clusterServer)
100 fClusterServer(clusterServer),
101 fRecoParam(recoParam)
103 /// Constructor for class AliMUONVTrackReconstructor
104 /// WARNING: if clusterServer=0x0, no clusterization will be possible at this level
106 // Memory allocation for the TClonesArray of reconstructed tracks
107 fRecTracksPtr = new TClonesArray("AliMUONTrack", 100);
109 // set the magnetic field for track extrapolations
110 AliMUONTrackExtrap::SetField();
113 //__________________________________________________________________________
114 AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor()
116 /// Destructor for class AliMUONVTrackReconstructor
117 delete fRecTracksPtr;
120 //__________________________________________________________________________
121 void AliMUONVTrackReconstructor::ResetTracks()
123 /// To reset the TClonesArray of reconstructed tracks
124 if (fRecTracksPtr) fRecTracksPtr->Clear("C");
129 //__________________________________________________________________________
130 void AliMUONVTrackReconstructor::EventReconstruct(AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore)
132 /// To reconstruct one event
134 AliCodeTimerAuto("");
136 // Reset array of tracks
139 // Look for candidates from clusters in stations(1..) 4 and 5
140 MakeTrackCandidates(clusterStore);
142 // Look for extra candidates from clusters in stations(1..) 4 and 5
143 if (GetRecoParam()->MakeMoreTrackCandidates()) MakeMoreTrackCandidates(clusterStore);
145 // Stop tracking if no candidate found
146 if (fRecTracksPtr->GetEntriesFast() == 0) return;
148 // Follow tracks in stations(1..) 3, 2 and 1
149 FollowTracks(clusterStore);
151 // Complement the reconstructed tracks
152 if (GetRecoParam()->ComplementTracks()) ComplementTracks(clusterStore);
154 // Improve the reconstructed tracks
155 if (GetRecoParam()->ImproveTracks()) ImproveTracks();
157 // Remove connected tracks
158 if (GetRecoParam()->RemoveConnectedTracksInSt12()) RemoveConnectedTracks(kFALSE);
159 else RemoveConnectedTracks(kTRUE);
161 // Fill AliMUONTrack data members
164 // Add tracks to MUON data container
165 for (Int_t i=0; i<fNRecTracks; ++i)
167 AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i);
168 track->SetUniqueID(i+1);
169 trackStore.Add(*track);
173 //__________________________________________________________________________
174 TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsBetweenChambers(const AliMUONVClusterStore& clusterStore, Int_t ch1, Int_t ch2)
176 /// To make the list of segments from the list of clusters in the 2 given chambers.
177 /// Return a new TClonesArray of segments.
178 /// It is the responsibility of the user to delete it afterward.
179 AliDebug(1,Form("Enter MakeSegmentsBetweenChambers (1..) %d-%d", ch1+1, ch2+1));
181 AliMUONVCluster *cluster1, *cluster2;
182 AliMUONObjectPair *segment;
183 Double_t nonBendingSlope = 0, bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning
185 // Create iterators to loop over clusters in both chambers
186 TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1));
187 TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2));
190 TClonesArray *segments = new TClonesArray("AliMUONObjectPair", 100);
192 // Loop over clusters in the first chamber of the station
193 while ( ( cluster1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) {
195 // reset cluster iterator of chamber 2
198 // Loop over clusters in the second chamber of the station
199 while ( ( cluster2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) {
202 nonBendingSlope = (cluster1->GetX() - cluster2->GetX()) / (cluster1->GetZ() - cluster2->GetZ());
204 // check if non bending slope is within tolerances
205 if (TMath::Abs(nonBendingSlope) > GetRecoParam()->GetMaxNonBendingSlope()) continue;
208 bendingSlope = (cluster1->GetY() - cluster2->GetY()) / (cluster1->GetZ() - cluster2->GetZ());
210 // check the bending momentum of the bending slope depending if the field is ON or OFF
211 if (AliMUONTrackExtrap::IsFieldON()) {
214 impactParam = cluster1->GetY() - cluster1->GetZ() * bendingSlope;
216 // absolute value of bending momentum
217 bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam));
219 // check if bending momentum is within tolerances
220 if (bendingMomentum < GetRecoParam()->GetMinBendingMomentum() ||
221 bendingMomentum > GetRecoParam()->GetMaxBendingMomentum()) continue;
225 // check if non bending slope is within tolerances
226 if (TMath::Abs(bendingSlope) > GetRecoParam()->GetMaxBendingSlope()) continue;
230 segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(cluster1, cluster2, kFALSE, kFALSE);
232 // Printout for debug
233 if (AliLog::GetGlobalDebugLevel() > 1) {
234 cout << "segmentIndex(0...): " << segments->GetLast() << endl;
236 cout << "Cluster in first chamber" << endl;
238 cout << "Cluster in second chamber" << endl;
246 // Printout for debug
247 AliDebug(1,Form("chambers%d-%d: NSegments = %d ", ch1+1, ch2+1, segments->GetEntriesFast()));
252 //__________________________________________________________________________
253 void AliMUONVTrackReconstructor::RemoveIdenticalTracks()
255 /// To remove identical tracks:
256 /// Tracks are considered identical if they have all their clusters in common.
257 /// One keeps the track with the larger number of clusters if need be
258 AliMUONTrack *track1, *track2, *trackToRemove;
259 Int_t clustersInCommon, nClusters1, nClusters2;
260 Bool_t removedTrack1;
261 // Loop over first track of the pair
262 track1 = (AliMUONTrack*) fRecTracksPtr->First();
264 removedTrack1 = kFALSE;
265 nClusters1 = track1->GetNClusters();
266 // Loop over second track of the pair
267 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
269 nClusters2 = track2->GetNClusters();
270 // number of clusters in common between two tracks
271 clustersInCommon = track1->ClustersInCommon(track2);
272 // check for identical tracks
273 if ((clustersInCommon == nClusters1) || (clustersInCommon == nClusters2)) {
274 // decide which track to remove
275 if (nClusters2 > nClusters1) {
276 // remove track1 and continue the first loop with the track next to track1
277 trackToRemove = track1;
278 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
279 fRecTracksPtr->Remove(trackToRemove);
280 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
282 removedTrack1 = kTRUE;
285 // remove track2 and continue the second loop with the track next to track2
286 trackToRemove = track2;
287 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
288 fRecTracksPtr->Remove(trackToRemove);
289 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
292 } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
294 if (removedTrack1) continue;
295 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
300 //__________________________________________________________________________
301 void AliMUONVTrackReconstructor::RemoveDoubleTracks()
303 /// To remove double tracks:
304 /// Tracks are considered identical if more than half of the clusters of the track
305 /// which has the smaller number of clusters are in common with the other track.
306 /// Among two identical tracks, one keeps the track with the larger number of clusters
307 /// or, if these numbers are equal, the track with the minimum chi2.
308 AliMUONTrack *track1, *track2, *trackToRemove;
309 Int_t clustersInCommon, nClusters1, nClusters2;
310 Bool_t removedTrack1;
311 // Loop over first track of the pair
312 track1 = (AliMUONTrack*) fRecTracksPtr->First();
314 removedTrack1 = kFALSE;
315 nClusters1 = track1->GetNClusters();
316 // Loop over second track of the pair
317 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
319 nClusters2 = track2->GetNClusters();
320 // number of clusters in common between two tracks
321 clustersInCommon = track1->ClustersInCommon(track2);
322 // check for identical tracks
323 if (((nClusters1 < nClusters2) && (2 * clustersInCommon > nClusters1)) || (2 * clustersInCommon > nClusters2)) {
324 // decide which track to remove
325 if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) {
326 // remove track2 and continue the second loop with the track next to track2
327 trackToRemove = track2;
328 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
329 fRecTracksPtr->Remove(trackToRemove);
330 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
333 // else remove track1 and continue the first loop with the track next to track1
334 trackToRemove = track1;
335 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
336 fRecTracksPtr->Remove(trackToRemove);
337 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
339 removedTrack1 = kTRUE;
342 } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
344 if (removedTrack1) continue;
345 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
350 //__________________________________________________________________________
351 void AliMUONVTrackReconstructor::RemoveConnectedTracks(Bool_t inSt345)
353 /// To remove double tracks:
354 /// Tracks are considered identical if they share 1 cluster or more.
355 /// If inSt345=kTRUE only stations 3, 4 and 5 are considered.
356 /// Among two identical tracks, one keeps the track with the larger number of clusters
357 /// or, if these numbers are equal, the track with the minimum chi2.
358 AliMUONTrack *track1, *track2, *trackToRemove;
359 Int_t clustersInCommon, nClusters1, nClusters2;
360 Bool_t removedTrack1;
361 // Loop over first track of the pair
362 track1 = (AliMUONTrack*) fRecTracksPtr->First();
364 removedTrack1 = kFALSE;
365 nClusters1 = track1->GetNClusters();
366 // Loop over second track of the pair
367 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
369 nClusters2 = track2->GetNClusters();
370 // number of clusters in common between two tracks
371 clustersInCommon = track1->ClustersInCommon(track2, inSt345);
372 // check for identical tracks
373 if (clustersInCommon > 0) {
374 // decide which track to remove
375 if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) {
376 // remove track2 and continue the second loop with the track next to track2
377 trackToRemove = track2;
378 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
379 fRecTracksPtr->Remove(trackToRemove);
380 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
383 // else remove track1 and continue the first loop with the track next to track1
384 trackToRemove = track1;
385 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
386 fRecTracksPtr->Remove(trackToRemove);
387 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
389 removedTrack1 = kTRUE;
392 } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
394 if (removedTrack1) continue;
395 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
400 //__________________________________________________________________________
401 void AliMUONVTrackReconstructor::AskForNewClustersInChamber(const AliMUONTrackParam &trackParam,
402 AliMUONVClusterStore& clusterStore, Int_t chamber)
404 /// Ask the clustering to reconstruct new clusters around the track candidate position
406 // check if the current chamber is useable
407 if (!fClusterServer || !GetRecoParam()->UseChamber(chamber)) return;
409 // maximum distance between the center of the chamber and a detection element
410 // (accounting for the inclination of the chamber)
411 static const Double_t kMaxDZ = 15.; // 15 cm
413 // extrapolate track parameters to the chamber
414 AliMUONTrackParam extrapTrackParam(trackParam);
415 AliMUONTrackExtrap::ExtrapToZCov(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(chamber));
417 // build the searching area using the track resolution and the maximum-distance-to-track value
418 const TMatrixD& kParamCov = extrapTrackParam.GetCovariances();
419 Double_t errX2 = kParamCov(0,0) + kMaxDZ * kMaxDZ * kParamCov(1,1) + 2. * kMaxDZ * TMath::Abs(kParamCov(0,1));
420 Double_t errY2 = kParamCov(2,2) + kMaxDZ * kMaxDZ * kParamCov(3,3) + 2. * kMaxDZ * TMath::Abs(kParamCov(2,3));
421 Double_t dX = TMath::Abs(trackParam.GetNonBendingSlope()) * kMaxDZ +
422 GetRecoParam()->GetMaxNonBendingDistanceToTrack() +
423 GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(errX2);
424 Double_t dY = TMath::Abs(trackParam.GetBendingSlope()) * kMaxDZ +
425 GetRecoParam()->GetMaxBendingDistanceToTrack() +
426 GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(errY2);
427 TVector2 dimensions(dX, dY);
428 TVector2 position(extrapTrackParam.GetNonBendingCoor(), extrapTrackParam.GetBendingCoor());
429 AliMpArea area(position, dimensions);
431 // ask to cluterize in the given area of the given chamber
432 fClusterServer->Clusterize(chamber, clusterStore, area, GetRecoParam());
436 //__________________________________________________________________________
437 void AliMUONVTrackReconstructor::AskForNewClustersInStation(const AliMUONTrackParam &trackParam,
438 AliMUONVClusterStore& clusterStore, Int_t station)
440 /// Ask the clustering to reconstruct new clusters around the track candidate position
441 /// in the 2 chambers of the given station
442 AskForNewClustersInChamber(trackParam, clusterStore, 2*station+1);
443 AskForNewClustersInChamber(trackParam, clusterStore, 2*station);
446 //__________________________________________________________________________
447 Double_t AliMUONVTrackReconstructor::TryOneCluster(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster,
448 AliMUONTrackParam &trackParamAtCluster, Bool_t updatePropagator)
450 /// Test the compatibility between the track and the cluster (using trackParam's covariance matrix):
451 /// return the corresponding Chi2
452 /// return trackParamAtCluster
454 // extrapolate track parameters and covariances at the z position of the tested cluster
455 trackParamAtCluster = trackParam;
456 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtCluster, cluster->GetZ(), updatePropagator);
458 // set pointer to cluster into trackParamAtCluster
459 trackParamAtCluster.SetClusterPtr(cluster);
461 // Set differences between trackParam and cluster in the bending and non bending directions
462 Double_t dX = cluster->GetX() - trackParamAtCluster.GetNonBendingCoor();
463 Double_t dY = cluster->GetY() - trackParamAtCluster.GetBendingCoor();
465 // Calculate errors and covariances
466 const TMatrixD& kParamCov = trackParamAtCluster.GetCovariances();
467 Double_t sigmaX2 = kParamCov(0,0) + cluster->GetErrX2();
468 Double_t sigmaY2 = kParamCov(2,2) + cluster->GetErrY2();
471 return dX * dX / sigmaX2 + dY * dY / sigmaY2;
475 //__________________________________________________________________________
476 Bool_t AliMUONVTrackReconstructor::TryOneClusterFast(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster)
478 /// Test the compatibility between the track and the cluster
479 /// given the track resolution + the maximum-distance-to-track value
480 /// and assuming linear propagation of the track:
481 /// return kTRUE if they are compatibles
483 Double_t dZ = cluster->GetZ() - trackParam.GetZ();
484 Double_t dX = cluster->GetX() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ);
485 Double_t dY = cluster->GetY() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ);
486 const TMatrixD& kParamCov = trackParam.GetCovariances();
487 Double_t errX2 = kParamCov(0,0) + dZ * dZ * kParamCov(1,1) + 2. * dZ * kParamCov(0,1);
488 Double_t errY2 = kParamCov(2,2) + dZ * dZ * kParamCov(3,3) + 2. * dZ * kParamCov(2,3);
490 Double_t dXmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(errX2) +
491 GetRecoParam()->GetMaxNonBendingDistanceToTrack();
492 Double_t dYmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(errY2) +
493 GetRecoParam()->GetMaxBendingDistanceToTrack();
495 if (TMath::Abs(dX) > dXmax || TMath::Abs(dY) > dYmax) return kFALSE;
501 //__________________________________________________________________________
502 Double_t AliMUONVTrackReconstructor::TryTwoClustersFast(const AliMUONTrackParam &trackParamAtCluster1, AliMUONVCluster* cluster2,
503 AliMUONTrackParam &trackParamAtCluster2)
505 /// Test the compatibility between the track and the 2 clusters together (using trackParam's covariance matrix)
506 /// assuming linear propagation between the two clusters:
507 /// return the corresponding Chi2 accounting for covariances between the 2 clusters
508 /// return trackParamAtCluster2
510 // extrapolate linearly track parameters and covariances at the z position of the second cluster
511 trackParamAtCluster2 = trackParamAtCluster1;
512 AliMUONTrackExtrap::LinearExtrapToZ(&trackParamAtCluster2, cluster2->GetZ());
514 // set pointer to cluster2 into trackParamAtCluster2
515 trackParamAtCluster2.SetClusterPtr(cluster2);
517 // Set differences between track and clusters in the bending and non bending directions
518 AliMUONVCluster* cluster1 = trackParamAtCluster1.GetClusterPtr();
519 Double_t dX1 = cluster1->GetX() - trackParamAtCluster1.GetNonBendingCoor();
520 Double_t dX2 = cluster2->GetX() - trackParamAtCluster2.GetNonBendingCoor();
521 Double_t dY1 = cluster1->GetY() - trackParamAtCluster1.GetBendingCoor();
522 Double_t dY2 = cluster2->GetY() - trackParamAtCluster2.GetBendingCoor();
524 // Calculate errors and covariances
525 const TMatrixD& kParamCov1 = trackParamAtCluster1.GetCovariances();
526 const TMatrixD& kParamCov2 = trackParamAtCluster2.GetCovariances();
527 Double_t dZ = trackParamAtCluster2.GetZ() - trackParamAtCluster1.GetZ();
528 Double_t sigma2X1 = kParamCov1(0,0) + cluster1->GetErrX2();
529 Double_t sigma2X2 = kParamCov2(0,0) + cluster2->GetErrX2();
530 Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1);
531 Double_t sigma2Y1 = kParamCov1(2,2) + cluster1->GetErrY2();
532 Double_t sigma2Y2 = kParamCov2(2,2) + cluster2->GetErrY2();
533 Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3);
536 Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2;
537 Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2;
538 if (detX == 0. || detY == 0.) return 1.e10;
539 return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX
540 + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY;
544 //__________________________________________________________________________
545 Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInChamber(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore,
548 /// Follow trackCandidate in chamber(0..) nextChamber assuming linear propagation, and search for compatible cluster(s)
549 /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks:
550 /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of
551 /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure.
552 /// Remove the obsolete "trackCandidate" at the end.
553 /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority.
554 /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE)
555 AliDebug(1,Form("Enter FollowLinearTrackInChamber(1..) %d", nextChamber+1));
557 Double_t chi2WithOneCluster = 1.e10;
558 Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() *
559 GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2
560 Double_t bestChi2WithOneCluster = maxChi2WithOneCluster;
561 Bool_t foundOneCluster = kFALSE;
562 AliMUONTrack *newTrack = 0x0;
563 AliMUONVCluster *cluster;
564 AliMUONTrackParam trackParam;
565 AliMUONTrackParam extrapTrackParamAtCluster;
566 AliMUONTrackParam bestTrackParamAtCluster;
568 // Get track parameters according to the propagation direction
569 if (nextChamber > 7) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last();
570 else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First();
572 // Printout for debuging
573 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) {
574 cout<<endl<<"Track parameters and covariances at first cluster:"<<endl;
575 trackParam.GetParameters().Print();
576 trackParam.GetCovariances().Print();
580 AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
582 // Printout for debuging
583 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
584 cout << "FollowLinearTrackInChamber: look for cluster in chamber(1..): " << nextChamber+1 << endl;
587 // Create iterators to loop over clusters in chamber
588 TIter next(clusterStore.CreateChamberIterator(nextChamber,nextChamber));
590 // look for candidates in chamber
591 while ( ( cluster = static_cast<AliMUONVCluster*>(next()) ) ) {
593 // try to add the current cluster fast
594 if (!TryOneClusterFast(trackParam, cluster)) continue;
596 // try to add the current cluster accuratly
597 extrapTrackParamAtCluster = trackParam;
598 AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster, cluster->GetZ());
599 chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster, cluster, extrapTrackParamAtCluster);
601 // if good chi2 then consider to add cluster
602 if (chi2WithOneCluster < maxChi2WithOneCluster) {
603 foundOneCluster = kTRUE;
605 // Printout for debuging
606 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
607 cout << "FollowLinearTrackInChamber: found one cluster in chamber(1..): " << nextChamber+1
608 << " (Chi2 = " << chi2WithOneCluster << ")" << endl;
612 if (GetRecoParam()->TrackAllTracks()) {
613 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster
614 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
615 if (GetRecoParam()->RequestStation(nextChamber/2))
616 extrapTrackParamAtCluster.SetRemovable(kFALSE);
617 else extrapTrackParamAtCluster.SetRemovable(kTRUE);
618 newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster,*cluster);
621 // Printout for debuging
622 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
623 cout << "FollowLinearTrackInChamber: added one cluster in chamber(1..): " << nextChamber+1 << endl;
624 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
627 } else if (chi2WithOneCluster < bestChi2WithOneCluster) {
628 // keep track of the best cluster
629 bestChi2WithOneCluster = chi2WithOneCluster;
630 bestTrackParamAtCluster = extrapTrackParamAtCluster;
637 // fill out the best track if required else clean up the fRecTracksPtr array
638 if (!GetRecoParam()->TrackAllTracks()) {
639 if (foundOneCluster) {
640 if (GetRecoParam()->RequestStation(nextChamber/2))
641 bestTrackParamAtCluster.SetRemovable(kFALSE);
642 else bestTrackParamAtCluster.SetRemovable(kTRUE);
643 trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster,*(bestTrackParamAtCluster.GetClusterPtr()));
645 // Printout for debuging
646 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
647 cout << "FollowLinearTrackInChamber: added the best cluster in chamber(1..): " << bestTrackParamAtCluster.GetClusterPtr()->GetChamberId()+1 << endl;
648 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
651 } else return kFALSE;
653 } else if (foundOneCluster) {
655 // remove obsolete track
656 fRecTracksPtr->Remove(&trackCandidate);
659 } else return kFALSE;
665 //__________________________________________________________________________
666 Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore,
669 /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible cluster(s)
670 /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks:
671 /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of
672 /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure.
673 /// Remove the obsolete "trackCandidate" at the end.
674 /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority.
675 /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE)
676 AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1));
678 // Order the chamber according to the propagation direction (tracking starts with chamber 2):
679 // - nextStation == station(1...) 5 => forward propagation
680 // - nextStation < station(1...) 5 => backward propagation
682 if (nextStation==4) {
683 ch1 = 2*nextStation+1;
687 ch2 = 2*nextStation+1;
690 Double_t chi2WithOneCluster = 1.e10;
691 Double_t chi2WithTwoClusters = 1.e10;
692 Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() *
693 GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2
694 Double_t maxChi2WithTwoClusters = 4. * GetRecoParam()->GetSigmaCutForTracking() *
695 GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2
696 Double_t bestChi2WithOneCluster = maxChi2WithOneCluster;
697 Double_t bestChi2WithTwoClusters = maxChi2WithTwoClusters;
698 Bool_t foundOneCluster = kFALSE;
699 Bool_t foundTwoClusters = kFALSE;
700 AliMUONTrack *newTrack = 0x0;
701 AliMUONVCluster *clusterCh1, *clusterCh2;
702 AliMUONTrackParam trackParam;
703 AliMUONTrackParam extrapTrackParamAtCluster1;
704 AliMUONTrackParam extrapTrackParamAtCluster2;
705 AliMUONTrackParam bestTrackParamAtCluster1;
706 AliMUONTrackParam bestTrackParamAtCluster2;
708 Int_t nClusters = clusterStore.GetSize();
709 Bool_t *clusterCh1Used = new Bool_t[nClusters];
710 for (Int_t i = 0; i < nClusters; i++) clusterCh1Used[i] = kFALSE;
713 // Get track parameters according to the propagation direction
714 if (nextStation==4) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last();
715 else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First();
717 // Printout for debuging
718 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) {
719 cout<<endl<<"Track parameters and covariances at first cluster:"<<endl;
720 trackParam.GetParameters().Print();
721 trackParam.GetCovariances().Print();
725 AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
727 // Printout for debuging
728 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
729 cout << "FollowLinearTrackInStation: look for clusters in chamber(1..): " << ch2+1 << endl;
732 // Create iterators to loop over clusters in both chambers
733 TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1));
734 TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2));
736 // look for candidates in chamber 2
737 while ( ( clusterCh2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) {
739 // try to add the current cluster fast
740 if (!TryOneClusterFast(trackParam, clusterCh2)) continue;
742 // try to add the current cluster accuratly
743 extrapTrackParamAtCluster2 = trackParam;
744 AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster2, clusterCh2->GetZ());
745 chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster2, clusterCh2, extrapTrackParamAtCluster2);
747 // if good chi2 then try to attach a cluster in the other chamber too
748 if (chi2WithOneCluster < maxChi2WithOneCluster) {
749 Bool_t foundSecondCluster = kFALSE;
751 // Printout for debuging
752 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
753 cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch2+1
754 << " (Chi2 = " << chi2WithOneCluster << ")" << endl;
756 cout << " look for second clusters in chamber(1..): " << ch1+1 << " ..." << endl;
760 AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtCluster2,AliMUONConstants::ChamberThicknessInX0(),1.);
762 // reset cluster iterator of chamber 1
766 // look for second candidates in chamber 1
767 while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) {
770 // try to add the current cluster fast
771 if (!TryOneClusterFast(extrapTrackParamAtCluster2, clusterCh1)) continue;
773 // try to add the current cluster in addition to the one found in the previous chamber
774 chi2WithTwoClusters = TryTwoClustersFast(extrapTrackParamAtCluster2, clusterCh1, extrapTrackParamAtCluster1);
776 // if good chi2 then consider to add the 2 clusters to the "trackCandidate"
777 if (chi2WithTwoClusters < maxChi2WithTwoClusters) {
778 foundSecondCluster = kTRUE;
779 foundTwoClusters = kTRUE;
781 // Printout for debuging
782 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
783 cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1
784 << " (Chi2 = " << chi2WithTwoClusters << ")" << endl;
788 if (GetRecoParam()->TrackAllTracks()) {
789 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new clusters
790 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
791 extrapTrackParamAtCluster1.SetRemovable(kTRUE);
792 newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1);
793 extrapTrackParamAtCluster2.SetRemovable(kTRUE);
794 newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2);
797 // Tag clusterCh1 as used
798 clusterCh1Used[iCluster1] = kTRUE;
800 // Printout for debuging
801 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
802 cout << "FollowLinearTrackInStation: added two clusters in station(1..): " << nextStation+1 << endl;
803 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
806 } else if (chi2WithTwoClusters < bestChi2WithTwoClusters) {
807 // keep track of the best couple of clusters
808 bestChi2WithTwoClusters = chi2WithTwoClusters;
809 bestTrackParamAtCluster1 = extrapTrackParamAtCluster1;
810 bestTrackParamAtCluster2 = extrapTrackParamAtCluster2;
817 // if no cluster found in chamber1 then consider to add clusterCh2 only
818 if (!foundSecondCluster) {
819 foundOneCluster = kTRUE;
821 if (GetRecoParam()->TrackAllTracks()) {
822 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster
823 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
824 if (GetRecoParam()->RequestStation(nextStation))
825 extrapTrackParamAtCluster2.SetRemovable(kFALSE);
826 else extrapTrackParamAtCluster2.SetRemovable(kTRUE);
827 newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2);
830 // Printout for debuging
831 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
832 cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch2+1 << endl;
833 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
836 } else if (!foundTwoClusters && chi2WithOneCluster < bestChi2WithOneCluster) {
837 // keep track of the best cluster except if a couple of clusters has already been found
838 bestChi2WithOneCluster = chi2WithOneCluster;
839 bestTrackParamAtCluster1 = extrapTrackParamAtCluster2;
848 // look for candidates in chamber 1 not already attached to a track
849 // if we want to keep all possible tracks or if no good couple of clusters has been found
850 if (GetRecoParam()->TrackAllTracks() || !foundTwoClusters) {
852 // Printout for debuging
853 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
854 cout << "FollowLinearTrackInStation: look for single cluster in chamber(1..): " << ch1+1 << endl;
857 //Extrapolate trackCandidate to chamber "ch2"
858 AliMUONTrackExtrap::LinearExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(ch2));
860 // add MCS effect for next step
861 AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
863 // reset cluster iterator of chamber 1
867 // look for second candidates in chamber 1
868 while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) {
871 if (clusterCh1Used[iCluster1]) continue; // Skip clusters already used
873 // try to add the current cluster fast
874 if (!TryOneClusterFast(trackParam, clusterCh1)) continue;
876 // try to add the current cluster accuratly
877 extrapTrackParamAtCluster1 = trackParam;
878 AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster1, clusterCh1->GetZ());
879 chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster1, clusterCh1, extrapTrackParamAtCluster1);
881 // if good chi2 then consider to add clusterCh1
882 // We do not try to attach a cluster in the other chamber too since it has already been done above
883 if (chi2WithOneCluster < maxChi2WithOneCluster) {
884 foundOneCluster = kTRUE;
886 // Printout for debuging
887 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
888 cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1
889 << " (Chi2 = " << chi2WithOneCluster << ")" << endl;
893 if (GetRecoParam()->TrackAllTracks()) {
894 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster
895 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
896 if (GetRecoParam()->RequestStation(nextStation))
897 extrapTrackParamAtCluster1.SetRemovable(kFALSE);
898 else extrapTrackParamAtCluster1.SetRemovable(kTRUE);
899 newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1);
902 // Printout for debuging
903 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
904 cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch1+1 << endl;
905 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
908 } else if (chi2WithOneCluster < bestChi2WithOneCluster) {
909 // keep track of the best cluster except if a couple of clusters has already been found
910 bestChi2WithOneCluster = chi2WithOneCluster;
911 bestTrackParamAtCluster1 = extrapTrackParamAtCluster1;
920 // fill out the best track if required else clean up the fRecTracksPtr array
921 if (!GetRecoParam()->TrackAllTracks()) {
922 if (foundTwoClusters) {
923 bestTrackParamAtCluster1.SetRemovable(kTRUE);
924 trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr()));
925 bestTrackParamAtCluster2.SetRemovable(kTRUE);
926 trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster2,*(bestTrackParamAtCluster2.GetClusterPtr()));
928 // Printout for debuging
929 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
930 cout << "FollowLinearTrackInStation: added the two best clusters in station(1..): " << nextStation+1 << endl;
931 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
934 } else if (foundOneCluster) {
935 if (GetRecoParam()->RequestStation(nextStation))
936 bestTrackParamAtCluster1.SetRemovable(kFALSE);
937 else bestTrackParamAtCluster1.SetRemovable(kTRUE);
938 trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr()));
940 // Printout for debuging
941 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
942 cout << "FollowLinearTrackInStation: added the best cluster in chamber(1..): " << bestTrackParamAtCluster1.GetClusterPtr()->GetChamberId()+1 << endl;
943 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
947 delete [] clusterCh1Used;
951 } else if (foundOneCluster || foundTwoClusters) {
953 // remove obsolete track
954 fRecTracksPtr->Remove(&trackCandidate);
958 delete [] clusterCh1Used;
962 delete [] clusterCh1Used;
967 //__________________________________________________________________________
968 void AliMUONVTrackReconstructor::ImproveTracks()
970 /// Improve tracks by removing clusters with local chi2 highter than the defined cut
971 /// Recompute track parameters and covariances at the remaining clusters
972 AliDebug(1,"Enter ImproveTracks");
974 AliMUONTrack *track, *nextTrack;
976 track = (AliMUONTrack*) fRecTracksPtr->First();
979 // prepare next track in case the actual track is suppressed
980 nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track);
982 ImproveTrack(*track);
984 // remove track if improvement failed
985 if (!track->IsImproved()) {
986 fRecTracksPtr->Remove(track);
993 // compress the array in case of some tracks have been removed
994 fRecTracksPtr->Compress();
998 //__________________________________________________________________________
999 void AliMUONVTrackReconstructor::Finalize()
1001 /// Recompute track parameters and covariances at each attached cluster from those at the first one
1003 AliMUONTrack *track;
1005 track = (AliMUONTrack*) fRecTracksPtr->First();
1008 FinalizeTrack(*track);
1010 track = (AliMUONTrack*) fRecTracksPtr->After(track);
1016 //__________________________________________________________________________
1017 void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore,
1018 const AliMUONVTriggerTrackStore& triggerTrackStore,
1019 const AliMUONVTriggerStore& triggerStore,
1020 const AliMUONTrackHitPattern& trackHitPattern)
1022 /// Try to match track from tracking system with trigger track
1023 AliCodeTimerAuto("");
1025 trackHitPattern.ExecuteValidation(trackStore, triggerTrackStore, triggerStore);
1028 //__________________________________________________________________________
1029 void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit,
1030 const AliMUONVTriggerStore& triggerStore,
1031 AliMUONVTriggerTrackStore& triggerTrackStore)
1033 /// To make the trigger tracks from Local Trigger
1035 AliCodeTimerAuto("");
1037 AliMUONGlobalTrigger* globalTrigger = triggerStore.Global();
1039 UChar_t gloTrigPat = 0;
1043 gloTrigPat = globalTrigger->GetGlobalResponse();
1046 TIter next(triggerStore.CreateIterator());
1047 AliMUONLocalTrigger* locTrg(0x0);
1049 Float_t z11 = AliMUONConstants::DefaultChamberZ(10);
1050 Float_t z21 = AliMUONConstants::DefaultChamberZ(12);
1052 AliMUONTriggerTrack triggerTrack;
1054 while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
1056 Bool_t xTrig=locTrg->IsTrigX();
1057 Bool_t yTrig=locTrg->IsTrigY();
1059 Int_t localBoardId = locTrg->LoCircuit();
1062 { // make Trigger Track if trigger in X and Y
1064 Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX());
1065 // need first to convert deviation to [0-30]
1066 // (see AliMUONLocalTriggerBoard::LocalTrigger)
1067 Int_t deviation = locTrg->GetDeviation();
1068 Int_t stripX21 = locTrg->LoStripX()+deviation+1;
1069 Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21);
1070 Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY());
1072 AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %f %f %f \n",locTrg->LoCircuit(),
1073 locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11));
1075 Float_t thetax = TMath::ATan2( x11 , z11 );
1076 Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) );
1078 triggerTrack.SetX11(x11);
1079 triggerTrack.SetY11(y11);
1080 triggerTrack.SetThetax(thetax);
1081 triggerTrack.SetThetay(thetay);
1082 triggerTrack.SetGTPattern(gloTrigPat);
1083 triggerTrack.SetLoTrgNum(localBoardId);
1085 triggerTrackStore.Add(triggerTrack);
1087 } // end of loop on Local Trigger