Bug fix
[u/mrichter/AliRoot.git] / MUON / AliMUONVTrackReconstructor.cxx
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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///
22/// This class contains as data:
23/// * a pointer to the array of hits to be reconstructed (the event)
06ca6d7b 24/// * a pointer to the array of reconstructed tracks
25///
26/// It contains as methods, among others:
27/// * EventReconstruct to build the muon tracks
28/// * EventReconstructTrigger to build the trigger tracks
29///
dfb547bf 30/// Several options and adjustable parameters are available for both Kalman and Original
31/// tracking algorithms (hard coded for the moment in AliMUONVTrackReconstructor.cxx):
32/// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be
33/// attached to the track candidate and to select good tracks.
019df241 34/// - *fgkMakeTrackCandidatesFast* : if this flag is set to 'true', the track candidates
35/// are made assuming linear propagation between stations 4 and 5.
dfb547bf 36/// - *fgkTrackAllTracks* : according to the value of this flag, in case that several
37/// new clusters pass the quality cut, either we consider all the possibilities
38/// (duplicating tracks) or we attach only the best cluster.
39/// - *fgkRecoverTracks* : if this flag is set to 'true', we try to recover the tracks
40/// lost during the tracking by removing the worst of the 2 clusters attached in the
41/// previous station.
42/// - *fgkImproveTracks* : if this flag is set to 'true', we try to improve the quality
43/// of the tracks at the end of the tracking by removing clusters that do not pass
3304fa09 44/// new quality cut (the track is removed is it does not contain enough cluster anymore).
45/// - *fgkComplementTracks* : if this flag is set to 'true', we try to improve the quality
46/// of the tracks at the end of the tracking by adding potentially missing clusters
47/// (we may have 2 clusters in the same chamber because of the overlapping of detection
48/// elements, which is not handle by the tracking algorithm).
dfb547bf 49/// - *fgkSigmaToCutForImprovement* : quality cut used when we try to improve the
50/// quality of the tracks.
51///
c4ee792d 52/// \author Philippe Pillot
3d1463c8 53//-----------------------------------------------------------------------------
8d0843c6 54
8d0843c6 55#include "AliMUONVTrackReconstructor.h"
7ec3b9cf 56
8d0843c6 57#include "AliMUONConstants.h"
58#include "AliMUONHitForRec.h"
208f139e 59#include "AliMUONObjectPair.h"
8d0843c6 60#include "AliMUONTriggerTrack.h"
e1a10d41 61#include "AliMUONTriggerCircuit.h"
8d0843c6 62#include "AliMUONLocalTrigger.h"
63#include "AliMUONGlobalTrigger.h"
8d0843c6 64#include "AliMUONTrack.h"
37827b29 65#include "AliMUONTrackParam.h"
66#include "AliMUONTrackExtrap.h"
7771752e 67#include "AliMUONTrackHitPattern.h"
7ec3b9cf 68#include "AliMUONVTrackStore.h"
69#include "AliMUONVClusterStore.h"
2060b217 70#include "AliMUONVCluster.h"
7ec3b9cf 71#include "AliMUONVTriggerStore.h"
72#include "AliMUONVTriggerTrackStore.h"
ea94c18b 73#include "AliMpDEManager.h"
74
75#include "AliLog.h"
b709ac13 76#include "AliCodeTimer.h"
ea94c18b 77#include "AliTracker.h"
8d0843c6 78
4889d34c 79#include <TClonesArray.h>
80#include <TMath.h>
ea94c18b 81#include <TMatrixD.h>
82
83#include <Riostream.h>
4889d34c 84
78649106 85/// \cond CLASSIMP
8d0843c6 86ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context
78649106 87/// \endcond
8d0843c6 88
ea94c18b 89 //__________________________________________________________________________
7ec3b9cf 90AliMUONVTrackReconstructor::AliMUONVTrackReconstructor()
8d0843c6 91 : TObject(),
8d0843c6 92 fHitsForRecPtr(0x0),
93 fNHitsForRec(0),
94 fNHitsForRecPerChamber(0x0),
95 fIndexOfFirstHitForRecPerChamber(0x0),
8d0843c6 96 fRecTracksPtr(0x0),
7ec3b9cf 97 fNRecTracks(0)
8d0843c6 98{
99 /// Constructor for class AliMUONVTrackReconstructor
8d0843c6 100 fNHitsForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()];
101 fIndexOfFirstHitForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()];
102
8d0843c6 103 // Memory allocation for the TClonesArray of hits for reconstruction
104 // Is 10000 the right size ????
105 fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000);
ea94c18b 106
107 // Memory allocation for the TClonesArray of reconstructed tracks
108 fRecTracksPtr = new TClonesArray("AliMUONTrack", 10);
7ec3b9cf 109
208f139e 110 // set the magnetic field for track extrapolations
8d0843c6 111 const AliMagF* kField = AliTracker::GetFieldMap();
112 if (!kField) AliFatal("No field available");
37827b29 113 AliMUONTrackExtrap::SetField(kField);
8d0843c6 114}
115
116 //__________________________________________________________________________
ea94c18b 117AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor()
8d0843c6 118{
119 /// Destructor for class AliMUONVTrackReconstructor
8d0843c6 120 delete [] fNHitsForRecPerChamber;
121 delete [] fIndexOfFirstHitForRecPerChamber;
8d0843c6 122 delete fHitsForRecPtr;
ea94c18b 123 delete fRecTracksPtr;
8d0843c6 124}
125
ea94c18b 126 //__________________________________________________________________________
127void AliMUONVTrackReconstructor::ResetHitsForRec()
128{
129 /// To reset the TClonesArray of HitsForRec,
130 /// and the number of HitForRec and the index of the first HitForRec per chamber
131 if (fHitsForRecPtr) fHitsForRecPtr->Clear("C");
132 fNHitsForRec = 0;
133 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) {
134 fNHitsForRecPerChamber[ch] = 0;
135 fIndexOfFirstHitForRecPerChamber[ch] = 0;
136 }
137}
138
139 //__________________________________________________________________________
140void AliMUONVTrackReconstructor::ResetTracks()
141{
142 /// To reset the TClonesArray of reconstructed tracks
143 if (fRecTracksPtr) fRecTracksPtr->Clear("C");
144 fNRecTracks = 0;
145 return;
146}
147
148 //__________________________________________________________________________
149void AliMUONVTrackReconstructor::EventReconstruct(const AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore)
150{
151 /// To reconstruct one event
152 AliDebug(1,"");
b709ac13 153 AliCodeTimerAuto("");
ea94c18b 154
155 ResetTracks();
156 ResetHitsForRec();
157 AddHitsForRecFromRawClusters(clusterStore);
158 MakeTracks();
159
160 // Add tracks to MUON data container
161 for (Int_t i=0; i<fNRecTracks; ++i)
162 {
163 AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i);
164 trackStore.Add(*track);
165 }
166}
167
168 //__________________________________________________________________________
169void AliMUONVTrackReconstructor::AddHitsForRecFromRawClusters(const AliMUONVClusterStore& clusterStore)
7ec3b9cf 170{
171 /// Build internal array of hit for rec from clusterStore
172
2060b217 173 AliMUONVCluster* clus(0x0);
7ec3b9cf 174 Int_t iclus(0);
175
2060b217 176 TIter next(clusterStore.CreateIterator());
177
178 while ( ( clus = static_cast<AliMUONVCluster*>(next()) ) )
7ec3b9cf 179 {
180 // new AliMUONHitForRec from raw cluster
181 // and increment number of AliMUONHitForRec's (total and in chamber)
182 AliMUONHitForRec* hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus);
183 fNHitsForRec++;
184 // more information into HitForRec
2060b217 185 hitForRec->SetNonBendingReso2(clus->GetErrX2());
186 hitForRec->SetBendingReso2(clus->GetErrY2());
7ec3b9cf 187 // original raw cluster
188 Int_t ch = AliMpDEManager::GetChamberId(clus->GetDetElemId());
189 hitForRec->SetChamberNumber(ch);
190 hitForRec->SetHitNumber(iclus);
191 // Z coordinate of the raw cluster (cm)
b709ac13 192 hitForRec->SetZ(clus->GetZ());
7ec3b9cf 193 if (AliLog::GetDebugLevel("MUON","AliMUONTrackReconstructor") >= 3) {
194 cout << "Chamber " << ch <<" raw cluster " << iclus << " : " << endl;
195 clus->Print("full");
196 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
197 hitForRec->Print("full");
198 }
199 ++iclus;
200 } // end of chamber loop
201
202 SortHitsForRecWithIncreasingChamber();
203
204 AliDebug(1,"End of AddHitsForRecFromRawClusters");
205
206 if (AliLog::GetGlobalDebugLevel() > 0)
207 {
208 AliDebug(1, Form("NHitsForRec: %d",fNHitsForRec));
209 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++)
210 {
211 AliDebug(1, Form("Chamber(0...): %d",ch));
212 AliDebug(1, Form("NHitsForRec: %d", fNHitsForRecPerChamber[ch]));
213 AliDebug(1, Form("Index(first HitForRec): %d", fIndexOfFirstHitForRecPerChamber[ch]));
214 for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch];
215 hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch];
216 hit++) {
217 AliDebug(1, Form("HitForRec index(0...): %d",hit));
218 ((*fHitsForRecPtr)[hit])->Dump();
219 }
220 }
221 }
222}
223
8d0843c6 224 //__________________________________________________________________________
225void AliMUONVTrackReconstructor::SortHitsForRecWithIncreasingChamber()
226{
227 /// Sort HitsForRec's in increasing order with respect to chamber number.
228 /// Uses the function "Compare".
229 /// Update the information for HitsForRec per chamber too.
230 Int_t ch, nhits, prevch;
231 fHitsForRecPtr->Sort();
232 for (ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) {
233 fNHitsForRecPerChamber[ch] = 0;
234 fIndexOfFirstHitForRecPerChamber[ch] = 0;
235 }
236 prevch = 0; // previous chamber
237 nhits = 0; // number of hits in current chamber
238 // Loop over HitsForRec
239 for (Int_t hit = 0; hit < fNHitsForRec; hit++) {
240 // chamber number (0...)
241 ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber();
242 // increment number of hits in current chamber
243 (fNHitsForRecPerChamber[ch])++;
244 // update index of first HitForRec in current chamber
245 // if chamber number different from previous one
246 if (ch != prevch) {
247 fIndexOfFirstHitForRecPerChamber[ch] = hit;
248 prevch = ch;
249 }
250 }
251 return;
252}
253
254 //__________________________________________________________________________
ea94c18b 255void AliMUONVTrackReconstructor::MakeTracks()
256{
257 /// To make the tracks from the list of segments and points in all stations
258 AliDebug(1,"Enter MakeTracks");
259 // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
260 MakeTrackCandidates();
261 if (fRecTracksPtr->GetEntriesFast() == 0) return;
262 // Follow tracks in stations(1..) 3, 2 and 1
263 FollowTracks();
b709ac13 264 // Complement the reconstructed tracks
3304fa09 265 if (AliMUONReconstructor::GetRecoParam()->ComplementTracks()) ComplementTracks();
ea94c18b 266 // Improve the reconstructed tracks
3304fa09 267 if (AliMUONReconstructor::GetRecoParam()->ImproveTracks()) ImproveTracks();
ea94c18b 268 // Remove double tracks
269 RemoveDoubleTracks();
270 // Fill AliMUONTrack data members
271 Finalize();
272}
273
274 //__________________________________________________________________________
208f139e 275TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsInStation(Int_t station)
8d0843c6 276{
208f139e 277 /// To make the list of segments in station(0..) "Station" from the list of hits to be reconstructed.
278 /// Return a new TClonesArray of segments.
279 /// It is the responsibility of the user to delete it afterward.
280 AliDebug(1,Form("Enter MakeSegmentsPerStation (0...) %d",station));
281
8d0843c6 282 AliMUONHitForRec *hit1Ptr, *hit2Ptr;
208f139e 283 AliMUONObjectPair *segment;
22ccc301 284 Double_t bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning
7ec3b9cf 285 // first and second chambers (0...) in the station
208f139e 286 Int_t ch1 = 2 * station;
8d0843c6 287 Int_t ch2 = ch1 + 1;
7ec3b9cf 288
208f139e 289 // list of segments
290 TClonesArray *segments = new TClonesArray("AliMUONObjectPair", fNHitsForRecPerChamber[ch2]);
7ec3b9cf 291 segments->SetOwner(kTRUE);
292
208f139e 293 // Loop over HitForRec's in the first chamber of the station
8d0843c6 294 for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1];
295 hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1];
7ec3b9cf 296 hit1++)
297 {
8d0843c6 298 // pointer to the HitForRec
299 hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]);
208f139e 300 // Loop over HitsForRec's in the second chamber of the station
8d0843c6 301 for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2];
7ec3b9cf 302 hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2];
303 hit2++)
304 {
8d0843c6 305 // pointer to the HitForRec
306 hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]);
7ec3b9cf 307 if ( hit1Ptr->GetZ() - hit2Ptr->GetZ() != 0. )
308 {
22ccc301 309 // bending slope
208f139e 310 bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / (hit1Ptr->GetZ() - hit2Ptr->GetZ());
311 // impact parameter
312 impactParam = hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope;
313 // absolute value of bending momentum
7ec3b9cf 314 bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam));
315 } else
316 {
208f139e 317 AliWarning("hit1Ptr->GetZ() = hit2Ptr->GetZ(): no segment created");
318 continue;
319 }
22ccc301 320 // check for bending momentum within tolerances
3304fa09 321 if ((bendingMomentum < AliMUONReconstructor::GetRecoParam()->GetMaxBendingMomentum()) &&
322 (bendingMomentum > AliMUONReconstructor::GetRecoParam()->GetMinBendingMomentum()))
7ec3b9cf 323 {
324 // make new segment
325 segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(hit1Ptr, hit2Ptr, kFALSE, kFALSE);
326 if (AliLog::GetGlobalDebugLevel() > 1) {
327 cout << "segmentIndex(0...): " << segments->GetLast() << endl;
328 segment->Dump();
329 cout << "HitForRec in first chamber" << endl;
330 hit1Ptr->Dump();
331 cout << "HitForRec in second chamber" << endl;
332 hit2Ptr->Dump();
333 }
8d0843c6 334 }
335 } //for (Int_t hit2
336 } // for (Int_t hit1...
208f139e 337 AliDebug(1,Form("Station: %d NSegments: %d ", station, segments->GetEntriesFast()));
338 return segments;
8d0843c6 339}
340
ea94c18b 341 //__________________________________________________________________________
342void AliMUONVTrackReconstructor::RemoveIdenticalTracks()
343{
344 /// To remove identical tracks:
345 /// Tracks are considered identical if they have all their hits in common.
346 /// One keeps the track with the larger number of hits if need be
347 AliMUONTrack *track1, *track2, *trackToRemove;
348 Int_t hitsInCommon, nHits1, nHits2;
349 Bool_t removedTrack1;
350 // Loop over first track of the pair
351 track1 = (AliMUONTrack*) fRecTracksPtr->First();
352 while (track1) {
353 removedTrack1 = kFALSE;
354 nHits1 = track1->GetNTrackHits();
355 // Loop over second track of the pair
356 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
357 while (track2) {
358 nHits2 = track2->GetNTrackHits();
359 // number of hits in common between two tracks
360 hitsInCommon = track1->HitsInCommon(track2);
361 // check for identical tracks
362 if ((hitsInCommon == nHits1) || (hitsInCommon == nHits2)) {
363 // decide which track to remove
364 if (nHits2 > nHits1) {
365 // remove track1 and continue the first loop with the track next to track1
366 trackToRemove = track1;
367 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
368 fRecTracksPtr->Remove(trackToRemove);
369 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
370 fNRecTracks--;
371 removedTrack1 = kTRUE;
372 break;
373 } else {
374 // remove track2 and continue the second loop with the track next to track2
375 trackToRemove = track2;
376 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
377 fRecTracksPtr->Remove(trackToRemove);
378 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
379 fNRecTracks--;
380 }
381 } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
382 } // track2
383 if (removedTrack1) continue;
384 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
385 } // track1
386 return;
387}
388
389 //__________________________________________________________________________
390void AliMUONVTrackReconstructor::RemoveDoubleTracks()
391{
392 /// To remove double tracks:
393 /// Tracks are considered identical if more than half of the hits of the track
394 /// which has the smaller number of hits are in common with the other track.
395 /// Among two identical tracks, one keeps the track with the larger number of hits
396 /// or, if these numbers are equal, the track with the minimum chi2.
397 AliMUONTrack *track1, *track2, *trackToRemove;
398 Int_t hitsInCommon, nHits1, nHits2;
399 Bool_t removedTrack1;
400 // Loop over first track of the pair
401 track1 = (AliMUONTrack*) fRecTracksPtr->First();
402 while (track1) {
403 removedTrack1 = kFALSE;
404 nHits1 = track1->GetNTrackHits();
405 // Loop over second track of the pair
406 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
407 while (track2) {
408 nHits2 = track2->GetNTrackHits();
409 // number of hits in common between two tracks
410 hitsInCommon = track1->HitsInCommon(track2);
411 // check for identical tracks
412 if (((nHits1 < nHits2) && (2 * hitsInCommon > nHits1)) || (2 * hitsInCommon > nHits2)) {
413 // decide which track to remove
414 if ((nHits1 > nHits2) || ((nHits1 == nHits2) && (track1->GetFitFMin() <= track2->GetFitFMin()))) {
415 // remove track2 and continue the second loop with the track next to track2
416 trackToRemove = track2;
417 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
418 fRecTracksPtr->Remove(trackToRemove);
419 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
420 fNRecTracks--;
421 } else {
422 // else remove track1 and continue the first loop with the track next to track1
423 trackToRemove = track1;
424 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
425 fRecTracksPtr->Remove(trackToRemove);
426 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
427 fNRecTracks--;
428 removedTrack1 = kTRUE;
429 break;
430 }
431 } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
432 } // track2
433 if (removedTrack1) continue;
434 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
435 } // track1
436 return;
437}
438
439 //__________________________________________________________________________
440Double_t AliMUONVTrackReconstructor::TryOneHitForRec(const AliMUONTrackParam &trackParam, AliMUONHitForRec* hitForRec,
441 AliMUONTrackParam &trackParamAtHit, Bool_t updatePropagator)
442{
443/// Test the compatibility between the track and the hitForRec (using trackParam's covariance matrix):
444/// return the corresponding Chi2
445/// return trackParamAtHit
446
ea94c18b 447 // extrapolate track parameters and covariances at the z position of the tested hit
019df241 448 trackParamAtHit = trackParam;
449 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtHit, hitForRec->GetZ(), updatePropagator);
ea94c18b 450
451 // set pointer to hit into trackParamAtHit
452 trackParamAtHit.SetHitForRecPtr(hitForRec);
453
454 // Set differences between trackParam and hitForRec in the bending and non bending directions
019df241 455 Double_t dX = hitForRec->GetNonBendingCoor() - trackParamAtHit.GetNonBendingCoor();
456 Double_t dY = hitForRec->GetBendingCoor() - trackParamAtHit.GetBendingCoor();
ea94c18b 457
019df241 458 // Calculate errors and covariances
ea94c18b 459 const TMatrixD& kParamCov = trackParamAtHit.GetCovariances();
019df241 460 Double_t sigma2X = kParamCov(0,0) + hitForRec->GetNonBendingReso2();
461 Double_t sigma2Y = kParamCov(2,2) + hitForRec->GetBendingReso2();
462
463 // Compute chi2
464 return dX * dX / sigma2X + dY * dY / sigma2Y;
465
466}
467
468 //__________________________________________________________________________
469Bool_t AliMUONVTrackReconstructor::TryOneHitForRecFast(const AliMUONTrackParam &trackParam, AliMUONHitForRec* hitForRec)
470{
471/// Test the compatibility between the track and the hitForRec within a wide fix window
472/// assuming linear propagation of the track:
473/// return kTRUE if they are compatibles
474
475 Double_t dZ = hitForRec->GetZ() - trackParam.GetZ();
476 Double_t dX = hitForRec->GetNonBendingCoor() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ);
477 Double_t dY = hitForRec->GetBendingCoor() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ);
478
3304fa09 479 if (TMath::Abs(dX) > AliMUONReconstructor::GetRecoParam()->GetMaxNonBendingDistanceToTrack() ||
480 TMath::Abs(dY) > AliMUONReconstructor::GetRecoParam()->GetMaxBendingDistanceToTrack()) return kFALSE;
019df241 481
482 return kTRUE;
483
484}
485
486 //__________________________________________________________________________
487Double_t AliMUONVTrackReconstructor::TryTwoHitForRecFast(const AliMUONTrackParam &trackParamAtHit1, AliMUONHitForRec* hitForRec2,
488 AliMUONTrackParam &trackParamAtHit2)
489{
490/// Test the compatibility between the track and the 2 hitForRec together (using trackParam's covariance matrix)
491/// assuming linear propagation between the two hits:
492/// return the corresponding Chi2 accounting for covariances between the 2 hitForRec
493/// return trackParamAtHit1 & 2
494
495 // extrapolate linearly track parameters at the z position of the second hit
496 trackParamAtHit2 = trackParamAtHit1;
497 AliMUONTrackExtrap::LinearExtrapToZ(&trackParamAtHit2, hitForRec2->GetZ());
498
499 // set pointer to hit2 into trackParamAtHit2
500 trackParamAtHit2.SetHitForRecPtr(hitForRec2);
501
502 // Set differences between track and hitForRec in the bending and non bending directions
503 AliMUONHitForRec* hitForRec1 = trackParamAtHit1.GetHitForRecPtr();
504 Double_t dX1 = hitForRec1->GetNonBendingCoor() - trackParamAtHit1.GetNonBendingCoor();
505 Double_t dX2 = hitForRec2->GetNonBendingCoor() - trackParamAtHit2.GetNonBendingCoor();
506 Double_t dY1 = hitForRec1->GetBendingCoor() - trackParamAtHit1.GetBendingCoor();
507 Double_t dY2 = hitForRec2->GetBendingCoor() - trackParamAtHit2.GetBendingCoor();
508
509 // Calculate errors and covariances
510 const TMatrixD& kParamCov1 = trackParamAtHit1.GetCovariances();
511 const TMatrixD& kParamCov2 = trackParamAtHit2.GetCovariances();
512 Double_t dZ = trackParamAtHit2.GetZ() - trackParamAtHit1.GetZ();
513 Double_t sigma2X1 = kParamCov1(0,0) + hitForRec1->GetNonBendingReso2();
514 Double_t sigma2X2 = kParamCov2(0,0) + hitForRec2->GetNonBendingReso2();
515 Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1);
516 Double_t sigma2Y1 = kParamCov1(2,2) + hitForRec1->GetBendingReso2();
517 Double_t sigma2Y2 = kParamCov2(2,2) + hitForRec2->GetBendingReso2();
518 Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3);
519
520 // Compute chi2
521 Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2;
522 Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2;
523 if (detX == 0. || detY == 0.) return 1.e10;
524 return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX
525 + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY;
526
527}
528
529 //__________________________________________________________________________
530Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, Int_t nextStation)
531{
532 /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible HitForRec(s)
533 /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks:
534 /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of
535 /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure.
536 /// Remove the obsolete "trackCandidate" at the end.
537 /// kFALSE: add only the best hit(s) to the "trackCandidate". Try to add a couple of hits in priority.
538 /// return kTRUE if new hits have been found (otherwise return kFALSE)
539 AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1));
540
541 // Order the chamber according to the propagation direction (tracking starts with chamber 2):
542 // - nextStation == station(1...) 5 => forward propagation
543 // - nextStation < station(1...) 5 => backward propagation
544 Int_t ch1, ch2;
545 if (nextStation==4) {
546 ch1 = 2*nextStation+1;
547 ch2 = 2*nextStation;
ea94c18b 548 } else {
019df241 549 ch1 = 2*nextStation;
550 ch2 = 2*nextStation+1;
ea94c18b 551 }
552
019df241 553 Double_t chi2WithOneHitForRec = 1.e10;
554 Double_t chi2WithTwoHitForRec = 1.e10;
3304fa09 555 Double_t maxChi2WithOneHitForRec = 2. * AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking() *
556 AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2
557 Double_t maxChi2WithTwoHitForRec = 4. * AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking() *
558 AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2
019df241 559 Double_t bestChi2WithOneHitForRec = maxChi2WithOneHitForRec;
560 Double_t bestChi2WithTwoHitForRec = maxChi2WithTwoHitForRec;
561 Bool_t foundOneHit = kFALSE;
562 Bool_t foundTwoHits = kFALSE;
563 AliMUONTrack *newTrack = 0x0;
564 AliMUONHitForRec *hitForRecCh1, *hitForRecCh2;
565 AliMUONTrackParam extrapTrackParamAtHit1;
566 AliMUONTrackParam extrapTrackParamAtHit2;
567 AliMUONTrackParam bestTrackParamAtHit1;
568 AliMUONTrackParam bestTrackParamAtHit2;
569 Bool_t *hitForRecCh1Used = new Bool_t[fNHitsForRecPerChamber[ch1]];
570 for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) hitForRecCh1Used[hit1] = kFALSE;
571
572 // Get track parameters
573 AliMUONTrackParam trackParam(*(AliMUONTrackParam*)trackCandidate.GetTrackParamAtHit()->First());
574
575 // Add MCS effect
576 AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
577
578 // Printout for debuging
579 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
580 cout << "FollowLinearTrackInStation: look for hits in chamber(1..): " << ch2+1 << endl;
581 }
582
583 // look for candidates in chamber 2
584 for (Int_t hit2 = 0; hit2 < fNHitsForRecPerChamber[ch2]; hit2++) {
585
586 hitForRecCh2 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch2]+hit2);
587
588 // try to add the current hit fast
589 if (!TryOneHitForRecFast(trackParam, hitForRecCh2)) continue;
590
591 // try to add the current hit accuratly
592 extrapTrackParamAtHit2 = trackParam;
593 AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtHit2, hitForRecCh2->GetZ());
594 chi2WithOneHitForRec = TryOneHitForRec(extrapTrackParamAtHit2, hitForRecCh2, extrapTrackParamAtHit2);
595
596 // if good chi2 then try to attach a hitForRec in the other chamber too
597 if (chi2WithOneHitForRec < maxChi2WithOneHitForRec) {
598 Bool_t foundSecondHit = kFALSE;
599
600 // Printout for debuging
601 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
602 cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch2+1
603 << " (Chi2 = " << chi2WithOneHitForRec << ")" << endl;
604 cout << " look for second hits in chamber(1..): " << ch1+1 << " ..." << endl;
605 }
606
607 // add MCS effect
608 AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtHit2,AliMUONConstants::ChamberThicknessInX0(),1.);
609
610 for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) {
611
612 hitForRecCh1 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch1]+hit1);
613
614 // try to add the current hit fast
615 if (!TryOneHitForRecFast(extrapTrackParamAtHit2, hitForRecCh1)) continue;
616
617 // try to add the current hit in addition to the one found on the previous chamber
618 chi2WithTwoHitForRec = TryTwoHitForRecFast(extrapTrackParamAtHit2, hitForRecCh1, extrapTrackParamAtHit1);
619
620 // if good chi2 then consider to add the 2 hitForRec to the "trackCandidate"
621 if (chi2WithTwoHitForRec < maxChi2WithTwoHitForRec) {
622 foundSecondHit = kTRUE;
623 foundTwoHits = kTRUE;
624
625 // Printout for debuging
626 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
627 cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch1+1
628 << " (Chi2 = " << chi2WithTwoHitForRec << ")" << endl;
629 }
630
3304fa09 631 if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) {
019df241 632 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's
633 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
634 extrapTrackParamAtHit1.SetRemovable(kTRUE);
635 newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit1,hitForRecCh1);
636 extrapTrackParamAtHit2.SetRemovable(kTRUE);
637 newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit2,hitForRecCh2);
638 newTrack->GetTrackParamAtHit()->Sort();
639 fNRecTracks++;
640
641 // Tag hitForRecCh1 as used
642 hitForRecCh1Used[hit1] = kTRUE;
643
644 // Printout for debuging
645 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
646 cout << "FollowLinearTrackInStation: added two hits in station(1..): " << nextStation+1 << endl;
647 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
648 }
649
650 } else if (chi2WithTwoHitForRec < bestChi2WithTwoHitForRec) {
651 // keep track of the best couple of hits
652 bestChi2WithTwoHitForRec = chi2WithTwoHitForRec;
653 bestTrackParamAtHit1 = extrapTrackParamAtHit1;
654 bestTrackParamAtHit2 = extrapTrackParamAtHit2;
655 }
656
657 }
658
659 }
660
661 // if no hitForRecCh1 found then consider to add hitForRecCh2 only
662 if (!foundSecondHit) {
663 foundOneHit = kTRUE;
664
3304fa09 665 if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) {
019df241 666 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's
667 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
668 extrapTrackParamAtHit2.SetRemovable(kFALSE);
669 newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit2,hitForRecCh2);
670 newTrack->GetTrackParamAtHit()->Sort();
671 fNRecTracks++;
672
673 // Printout for debuging
674 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
675 cout << "FollowLinearTrackInStation: added one hit in chamber(1..): " << ch2+1 << endl;
676 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
677 }
678
679 } else if (!foundTwoHits && chi2WithOneHitForRec < bestChi2WithOneHitForRec) {
680 // keep track of the best single hitForRec except if a couple of hits has already been found
681 bestChi2WithOneHitForRec = chi2WithOneHitForRec;
682 bestTrackParamAtHit1 = extrapTrackParamAtHit2;
683 }
684
685 }
686
687 }
688
689 }
690
691 // look for candidates in chamber 1 not already attached to a track
692 // if we want to keep all possible tracks or if no good couple of hitForRec has been found
3304fa09 693 if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks() || !foundTwoHits) {
019df241 694
695 // Printout for debuging
696 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
697 cout << "FollowLinearTrackInStation: look for single hits in chamber(1..): " << ch1+1 << endl;
698 }
699
700 //Extrapolate trackCandidate to chamber "ch2"
701 AliMUONTrackExtrap::LinearExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(ch2));
702
703 // add MCS effect for next step
704 AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
705
706 for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) {
707
708 hitForRecCh1 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch1]+hit1);
709
710 if (hitForRecCh1Used[hit1]) continue; // Skip hitForRec already used
711
712 // try to add the current hit fast
713 if (!TryOneHitForRecFast(trackParam, hitForRecCh1)) continue;
714
715 // try to add the current hit accuratly
716 extrapTrackParamAtHit1 = trackParam;
717 AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtHit1, hitForRecCh1->GetZ());
718 chi2WithOneHitForRec = TryOneHitForRec(extrapTrackParamAtHit1, hitForRecCh1, extrapTrackParamAtHit1);
719
720 // if good chi2 then consider to add hitForRecCh1
721 // We do not try to attach a hitForRec in the other chamber too since it has already been done above
722 if (chi2WithOneHitForRec < maxChi2WithOneHitForRec) {
723 foundOneHit = kTRUE;
724
725 // Printout for debuging
726 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
727 cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch1+1
728 << " (Chi2 = " << chi2WithOneHitForRec << ")" << endl;
729 }
730
3304fa09 731 if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) {
019df241 732 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's
733 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
734 extrapTrackParamAtHit1.SetRemovable(kFALSE);
735 newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit1,hitForRecCh1);
736 newTrack->GetTrackParamAtHit()->Sort();
737 fNRecTracks++;
738
739 // Printout for debuging
740 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
741 cout << "FollowLinearTrackInStation: added one hit in chamber(1..): " << ch1+1 << endl;
742 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
743 }
744
745 } else if (chi2WithOneHitForRec < bestChi2WithOneHitForRec) {
746 // keep track of the best single hitForRec except if a couple of hits has already been found
747 bestChi2WithOneHitForRec = chi2WithOneHitForRec;
748 bestTrackParamAtHit1 = extrapTrackParamAtHit1;
749 }
750
751 }
752
753 }
754
755 }
756
757 // fill out the best track if required else clean up the fRecTracksPtr array
3304fa09 758 if (!AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) {
019df241 759 if (foundTwoHits) {
760 bestTrackParamAtHit1.SetRemovable(kTRUE);
761 trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit1,bestTrackParamAtHit1.GetHitForRecPtr());
762 bestTrackParamAtHit2.SetRemovable(kTRUE);
763 trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit2,bestTrackParamAtHit2.GetHitForRecPtr());
764 trackCandidate.GetTrackParamAtHit()->Sort();
765
766 // Printout for debuging
767 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
768 cout << "FollowLinearTrackInStation: added the two best hits in station(1..): " << nextStation+1 << endl;
769 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
770 }
771
772 } else if (foundOneHit) {
773 bestTrackParamAtHit1.SetRemovable(kFALSE);
774 trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit1,bestTrackParamAtHit1.GetHitForRecPtr());
775 trackCandidate.GetTrackParamAtHit()->Sort();
776
777 // Printout for debuging
778 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
779 cout << "FollowLinearTrackInStation: added the best hit in chamber(1..): " << bestTrackParamAtHit1.GetHitForRecPtr()->GetChamberNumber()+1 << endl;
780 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
781 }
782
dd230855 783 } else {
784 delete [] hitForRecCh1Used;
785 return kFALSE;
786 }
019df241 787
788 } else if (foundOneHit || foundTwoHits) {
789
790 // remove obsolete track
791 fRecTracksPtr->Remove(&trackCandidate);
792 fNRecTracks--;
793
dd230855 794 } else {
795 delete [] hitForRecCh1Used;
796 return kFALSE;
797 }
ea94c18b 798
dd230855 799 delete [] hitForRecCh1Used;
019df241 800 return kTRUE;
ea94c18b 801
802}
803
804 //__________________________________________________________________________
7ec3b9cf 805void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore,
806 const AliMUONVTriggerTrackStore& triggerTrackStore,
807 const AliMUONVTriggerStore& triggerStore,
808 const AliMUONTrackHitPattern& trackHitPattern)
8d0843c6 809{
810 /// Try to match track from tracking system with trigger track
b709ac13 811 AliCodeTimerAuto("");
812
06ca6d7b 813 static const Double_t kDistSigma[3]={1,1,0.02}; // sigma of distributions (trigger-track) X,Y,slopeY
208f139e 814
7771752e 815 Int_t matchTrigger;
7ec3b9cf 816 Int_t loTrgNum(-1);
8d0843c6 817 Double_t distTriggerTrack[3];
208f139e 818 Double_t xTrack, yTrack, ySlopeTrack, chi2MatchTrigger, minChi2MatchTrigger, chi2;
7ec3b9cf 819
820 TIter itTrack(trackStore.CreateIterator());
821 AliMUONTrack* track;
8d0843c6 822
7ec3b9cf 823 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
824 {
423b32ca 825 matchTrigger = 0;
8d0843c6 826 chi2MatchTrigger = 0.;
c6ba19f7 827 loTrgNum = -1;
7771752e 828 Int_t doubleMatch=-1; // Check if track matches 2 trigger tracks
829 Double_t doubleChi2 = -1.;
7ec3b9cf 830
831 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtHit()->Last())));
37827b29 832 AliMUONTrackExtrap::ExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(10)); // extrap to 1st trigger chamber
8d0843c6 833
834 xTrack = trackParam.GetNonBendingCoor();
835 yTrack = trackParam.GetBendingCoor();
836 ySlopeTrack = trackParam.GetBendingSlope();
208f139e 837 minChi2MatchTrigger = 999.;
7ec3b9cf 838
839 AliMUONTriggerTrack *triggerTrack;
840 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
841 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
842 {
06ca6d7b 843 distTriggerTrack[0] = (triggerTrack->GetX11()-xTrack)/kDistSigma[0];
844 distTriggerTrack[1] = (triggerTrack->GetY11()-yTrack)/kDistSigma[1];
845 distTriggerTrack[2] = (TMath::Tan(triggerTrack->GetThetay())-ySlopeTrack)/kDistSigma[2];
208f139e 846 chi2 = 0.;
847 for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar];
848 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
3304fa09 849 if (chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger())
7ec3b9cf 850 {
851 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
3304fa09 852 if (chi2 < minChi2MatchTrigger && chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger())
7ec3b9cf 853 {
854 if(isDoubleTrack)
855 {
856 doubleMatch = loTrgNum;
857 doubleChi2 = chi2MatchTrigger;
858 }
859 minChi2MatchTrigger = chi2;
860 chi2MatchTrigger = chi2;
861 loTrgNum = triggerTrack->GetLoTrgNum();
862 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
863 matchTrigger=1;
864 if(locTrg->LoLpt()>0)matchTrigger=2;
865 if(locTrg->LoHpt()>0)matchTrigger=3;
866 }
867 else if(isDoubleTrack)
868 {
869 doubleMatch = triggerTrack->GetLoTrgNum();
870 doubleChi2 = chi2;
871 }
8d0843c6 872 }
8d0843c6 873 }
7ec3b9cf 874 if(doubleMatch>=0)
875 { // If two trigger tracks match, select the one passing more trigger cuts
876 AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch));
877 AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch);
878 if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3))
879 {
880 if(locTrg1->LoHpt()>0)matchTrigger=3;
881 else matchTrigger=2;
882 loTrgNum = doubleMatch;
883 chi2MatchTrigger=doubleChi2;
884 }
7771752e 885 }
8d0843c6 886
887 track->SetMatchTrigger(matchTrigger);
c6ba19f7 888 track->SetLoTrgNum(loTrgNum);
8d0843c6 889 track->SetChi2MatchTrigger(chi2MatchTrigger);
7ec3b9cf 890
891 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
892
893 if (locTrg)
894 {
895 track->SetLocalTrigger(locTrg->LoCircuit(),
896 locTrg->LoStripX(),
897 locTrg->LoStripY(),
898 locTrg->LoDev(),
899 locTrg->LoLpt(),
900 locTrg->LoHpt());
901 }
902 }
903
904 trackHitPattern.GetHitPattern(trackStore,triggerStore);
8d0843c6 905}
906
ea94c18b 907 //__________________________________________________________________________
908void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit,
909 const AliMUONVTriggerStore& triggerStore,
910 AliMUONVTriggerTrackStore& triggerTrackStore)
8d0843c6 911{
71a2d3aa 912 /// To make the trigger tracks from Local Trigger
7ec3b9cf 913 AliDebug(1, "");
b709ac13 914 AliCodeTimerAuto("");
7ec3b9cf 915
916 AliMUONGlobalTrigger* globalTrigger = triggerStore.Global();
e6b25a6e 917
7ec3b9cf 918 UChar_t gloTrigPat = 0;
e6b25a6e 919
7ec3b9cf 920 if (globalTrigger)
921 {
922 gloTrigPat = globalTrigger->GetGlobalResponse();
e6b25a6e 923 }
924
7ec3b9cf 925 TIter next(triggerStore.CreateIterator());
926 AliMUONLocalTrigger* locTrg(0x0);
8d0843c6 927
e6b25a6e 928 Float_t z11 = AliMUONConstants::DefaultChamberZ(10);
929 Float_t z21 = AliMUONConstants::DefaultChamberZ(12);
7cf63da6 930
7ec3b9cf 931 AliMUONTriggerTrack triggerTrack;
932
933 while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
934 {
935 Bool_t xTrig=kFALSE;
936 Bool_t yTrig=kFALSE;
937
32ab62c9 938 Int_t localBoardId = locTrg->LoCircuit();
7ec3b9cf 939 if ( locTrg->LoSdev()==1 && locTrg->LoDev()==0 &&
940 locTrg->LoStripX()==0) xTrig=kFALSE; // no trigger in X
941 else xTrig=kTRUE; // trigger in X
942 if (locTrg->LoTrigY()==1 &&
943 locTrg->LoStripY()==15 ) yTrig = kFALSE; // no trigger in Y
944 else yTrig = kTRUE; // trigger in Y
945
946 if (xTrig && yTrig)
947 { // make Trigger Track if trigger in X and Y
8b0baca4 948
32ab62c9 949 Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX());
7ec3b9cf 950 // need first to convert deviation to [0-30]
951 // (see AliMUONLocalTriggerBoard::LocalTrigger)
952 Int_t deviation = locTrg->LoDev();
953 Int_t sign = 0;
954 if ( !locTrg->LoSdev() && deviation ) sign=-1;
955 if ( !locTrg->LoSdev() && !deviation ) sign= 0;
956 if ( locTrg->LoSdev() == 1 ) sign=+1;
957 deviation *= sign;
958 deviation += 15;
959 Int_t stripX21 = locTrg->LoStripX()+deviation+1;
32ab62c9 960 Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21);
961 Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY());
7ec3b9cf 962
963 AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %f %f %f \n",locTrg->LoCircuit(),
964 locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11));
965
966 Float_t thetax = TMath::ATan2( x11 , z11 );
967 Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) );
968
969 triggerTrack.SetX11(x11);
970 triggerTrack.SetY11(y11);
971 triggerTrack.SetThetax(thetax);
972 triggerTrack.SetThetay(thetay);
973 triggerTrack.SetGTPattern(gloTrigPat);
32ab62c9 974 triggerTrack.SetLoTrgNum(localBoardId);
7ec3b9cf 975
976 triggerTrackStore.Add(triggerTrack);
977 } // board is fired
e6b25a6e 978 } // end of loop on Local Trigger
8d0843c6 979}
ea94c18b 980