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 **************************************************************************/
19 //-----------------------------------------------------------------------------
20 /// \class AliMUONTrackHitPattern
22 /// This class propagates tracks to trigger chambers
23 /// searching for matching trigger tracks and fired strips.
25 /// To each track, a hit pattern for trigger chambers is set.
27 /// The main method is:
28 /// * ExecuteValidation
30 /// \author Diego Stocco
31 //-----------------------------------------------------------------------------
34 #include "AliMUONTrackHitPattern.h"
36 #include "AliMUONConstants.h"
37 #include "AliMUONVDigit.h"
38 #include "AliMUONDigitMaker.h"
39 #include "AliMUONDigitStoreV1.h"
40 #include "AliMUONGeometryTransformer.h"
41 #include "AliMUONLocalTrigger.h"
42 #include "AliMUONLocalTriggerBoard.h"
43 #include "AliMUONRecoParam.h"
44 #include "AliMUONTrack.h"
45 #include "AliMUONTrackExtrap.h"
46 #include "AliMUONTrackParam.h"
47 #include "AliMUONVTrackStore.h"
48 #include "AliMUONVTriggerStore.h"
50 #include "AliMpSegmentation.h"
51 #include "AliMpVSegmentation.h"
52 #include "AliMpDEManager.h"
53 #include "AliMUONReconstructor.h"
54 #include "AliMUONTriggerTrack.h"
55 #include "AliMUONVTriggerTrackStore.h"
57 #include "AliMpConstants.h"
60 #include "AliTracker.h"
61 #include "AliESDMuonTrack.h"
63 #include <Riostream.h>
65 #include <TClonesArray.h>
69 #include <TDirectory.h>
77 ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context
81 //______________________________________________________________________________
82 AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONRecoParam* recoParam,
83 const AliMUONGeometryTransformer& transformer,
84 const AliMUONDigitMaker& digitMaker)
86 fkRecoParam(recoParam),
87 fkTransformer(transformer),
88 fkDigitMaker(digitMaker),
93 /// Default constructor
95 AliMUONTrackExtrap::SetField();
99 //______________________________________________________________________________
100 AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void)
103 delete fTrigCovariance;
107 //______________________________________________________________________________
108 void AliMUONTrackHitPattern::InitMembers()
111 /// Initialize data members
113 fDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10));
115 const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso();
116 const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso();
117 const Double_t kTrigSlopeBendReso = 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ;
118 const Double_t kTrigCovSlopeBend = - kTrigBendReso * kTrigBendReso / fDeltaZ;
120 // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks
121 fTrigCovariance = new TMatrixD(3,3);
122 fTrigCovariance->Zero();
123 (*fTrigCovariance)(0,0) = kTrigNonBendReso * kTrigNonBendReso;
124 (*fTrigCovariance)(1,1) = kTrigBendReso * kTrigBendReso;
125 (*fTrigCovariance)(2,2) = kTrigSlopeBendReso * kTrigSlopeBendReso;
126 (*fTrigCovariance)(1,2) = (*fTrigCovariance)(2,1) = kTrigCovSlopeBend;
130 //_____________________________________________________________________________
131 void AliMUONTrackHitPattern::CheckConstants() const
133 /// Check consistence of redefined constants
135 assert(fgkNcathodes == AliMpConstants::NofCathodes());
136 assert(fgkNchambers == AliMpConstants::NofTriggerChambers());
137 assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes);
141 //______________________________________________________________________________
142 void AliMUONTrackHitPattern::ExecuteValidation(const AliMUONVTrackStore& trackStore,
143 const AliMUONVTriggerTrackStore& triggerTrackStore,
144 const AliMUONVTriggerStore& triggerStore) const
148 /// Loops on reco tracks, extrapolates them to trigger chambers
149 /// and searches for matching trigger tracks and digits
152 AliMUONDigitStoreV1 digitStore;
153 fkDigitMaker.TriggerToDigitsStore(triggerStore,digitStore);
155 // Get the hit pattern for all trigger tracks
156 AliMUONTriggerTrack* triggerTrack;
157 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
158 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) ){
159 UShort_t pattern = GetHitPattern(triggerTrack, digitStore);
160 triggerTrack->SetHitsPatternInTrigCh(pattern);
161 AliDebug(1, Form("Hit pattern: hits 0x%x slat %2i board %3i effFlag %i",
162 pattern & 0xFF, AliESDMuonTrack::GetSlatOrInfo(pattern),
163 triggerTrack->GetLoTrgNum(), AliESDMuonTrack::GetEffFlag(pattern)));
166 // Match tracker tracks with trigger tracks.
167 TIter itTrack(trackStore.CreateIterator());
170 const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh();
172 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
174 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last())));
176 ApplyMCSCorrections(trackParam);
177 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber
179 AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore);
181 // Copy trigger tracks hit pattern if there is matching,
182 // otherwise calculate the hit pattern directly from tracker track:
183 // the obtained pattern is good for check, but not good for efficiency determination.
184 UShort_t pattern = matchedTriggerTrack ?
185 matchedTriggerTrack->GetHitsPatternInTrigCh() :
186 GetHitPattern(&trackParam, digitStore);
188 track->SetHitsPatternInTrigCh(pattern);
193 //______________________________________________________________________________
194 AliMUONTriggerTrack *
195 AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track,
196 AliMUONTrackParam& trackParam,
197 const AliMUONVTriggerTrackStore& triggerTrackStore,
198 const AliMUONVTriggerStore& triggerStore) const
201 /// Match track with trigger track
204 Int_t matchTrigger = 0;
206 Double_t distTriggerTrack[3], sigma2[3];
208 Double_t chi2MatchTrigger = 0., minChi2MatchTrigger = 999.;
209 Int_t doubleMatch = -1; // Check if track matches 2 trigger tracks
210 Double_t doubleChi2 = -1.;
211 AliMUONTriggerTrack* doubleTriggerTrack = 0x0;
212 AliMUONTriggerTrack* matchedTriggerTrack = 0x0;
214 const TMatrixD& kParamCov = trackParam.GetCovariances();
216 Double_t xTrack = trackParam.GetNonBendingCoor();
217 Double_t yTrack = trackParam.GetBendingCoor();
218 Double_t ySlopeTrack = trackParam.GetBendingSlope();
220 // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks
221 TMatrixD trackCov(3,3);
223 trackCov(0,0) = kParamCov(0,0);
224 trackCov(1,1) = kParamCov(2,2);
225 trackCov(2,2) = kParamCov(3,3);
226 trackCov(1,2) = kParamCov(2,3);
227 trackCov(2,1) = kParamCov(3,2);
229 TMatrixD sumCov(trackCov,TMatrixD::kPlus,*fTrigCovariance);
231 Bool_t isCovOK = kTRUE;
233 if (sumCov.Determinant() != 0) {
236 AliWarning(" Determinant = 0");
238 sigma2[0] = kParamCov(0,0);
239 sigma2[1] = kParamCov(2,2);
240 sigma2[2] = kParamCov(3,3);
241 // sigma of distributions (trigger-track) X,Y,slopeY
242 const Double_t kDistSigma[3]={AliMUONConstants::TriggerNonBendingReso(),
243 AliMUONConstants::TriggerBendingReso(),
244 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ};
245 for (Int_t iVar = 0; iVar < 3; iVar++) sigma2[iVar] += kDistSigma[iVar] * kDistSigma[iVar];
248 AliMUONTriggerTrack *triggerTrack;
249 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
250 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
252 distTriggerTrack[0] = triggerTrack->GetX11() - xTrack;
253 distTriggerTrack[1] = triggerTrack->GetY11() - yTrack;
254 distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay()) - ySlopeTrack;
257 TMatrixD paramDiff(3,1);
258 for(Int_t iVar = 0; iVar < 3; iVar++)
259 paramDiff(iVar,0) = distTriggerTrack[iVar];
261 TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff);
262 TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp);
267 for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar];
270 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
271 if (chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
273 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
274 if (chi2 < minChi2MatchTrigger && chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
278 doubleMatch = loTrgNum;
279 doubleChi2 = chi2MatchTrigger;
280 doubleTriggerTrack = matchedTriggerTrack;
282 minChi2MatchTrigger = chi2;
283 chi2MatchTrigger = chi2;
284 loTrgNum = triggerTrack->GetLoTrgNum();
285 matchedTriggerTrack = triggerTrack;
286 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
288 if(locTrg->LoLpt()>0) matchTrigger = 2;
289 if(locTrg->LoHpt()>0) matchTrigger = 3;
291 else if(isDoubleTrack)
293 doubleMatch = triggerTrack->GetLoTrgNum();
299 { // If two trigger tracks match, select the one passing more trigger cuts
300 AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch));
301 AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch);
302 if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3))
304 if(locTrg1->LoHpt()>0) matchTrigger=3;
305 else matchTrigger = 2;
306 loTrgNum = doubleMatch;
307 chi2MatchTrigger = doubleChi2;
308 matchedTriggerTrack = doubleTriggerTrack;
312 track->SetMatchTrigger(matchTrigger);
313 track->SetLoTrgNum(loTrgNum);
314 track->SetChi2MatchTrigger(chi2MatchTrigger);
316 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
320 Int_t deviation = locTrg->GetDeviation();
321 track->SetLocalTrigger(locTrg->LoCircuit(),
329 return matchedTriggerTrack;
333 //______________________________________________________________________________
334 UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTriggerTrack* matchedTriggerTrack,
335 AliMUONVDigitStore& digitStore) const
338 /// Get hit pattern on trigger chambers for the current trigger track
340 UShort_t pattern = 0;
341 PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore);
346 //______________________________________________________________________________
347 UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTrackParam* trackParam,
348 AliMUONVDigitStore& digitStore) const
351 /// Get hit pattern on trigger chambers for the current tracker track
353 UShort_t pattern = 0;
355 const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
357 for(Int_t ch=0; ch<4; ++ch)
359 Int_t iChamber = kNTrackingCh+ch;
360 AliMUONTrackExtrap::ExtrapToZCov(trackParam, AliMUONConstants::DefaultChamberZ(iChamber));
361 FindPadMatchingTrack(digitStore, *trackParam, isMatch, iChamber);
362 for(Int_t cath=0; cath<2; ++cath)
364 if(isMatch[cath]) AliESDMuonTrack::SetFiredChamber(pattern, cath, ch);
368 // pattern obtained by propagation of tracker track
369 // when it does not match the trigger.
370 AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackerTrackPattern);
375 //______________________________________________________________________________
377 AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const
380 /// Returns uncertainties on extrapolated position.
381 /// Takes into account Branson plane corrections in the iron wall.
384 const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd();
385 const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm
387 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end
388 AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects
393 //______________________________________________________________________________
395 AliMUONTrackHitPattern::FindPadMatchingTrack(const AliMUONVDigitStore& digitStore,
396 const AliMUONTrackParam& trackParam,
397 Bool_t isMatch[2], Int_t iChamber) const
400 /// Given the tracker track position, searches for matching digits.
403 Float_t minMatchDist[2];
405 for(Int_t cath=0; cath<2; ++cath)
407 isMatch[cath]=kFALSE;
408 minMatchDist[cath]=fkMaxDistance/10.;
411 TIter next(digitStore.CreateIterator());
412 AliMUONVDigit* mDigit;
414 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
416 Int_t currDetElemId = mDigit->DetElemId();
417 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
418 if(currCh!=iChamber) continue;
419 Int_t cathode = mDigit->Cathode();
420 Int_t ix = mDigit->PadX();
421 Int_t iy = mDigit->PadY();
422 Float_t xpad, ypad, zpad;
423 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
424 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
426 AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
427 Float_t xlocal1 = pad.GetPositionX();
428 Float_t ylocal1 = pad.GetPositionY();
429 Float_t dpx = pad.GetDimensionX();
430 Float_t dpy = pad.GetDimensionY();
432 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
433 Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam);
434 if(matchDist>minMatchDist[cathode])continue;
435 isMatch[cathode] = kTRUE;
436 if(isMatch[0] && isMatch[1]) break;
437 minMatchDist[cathode] = matchDist;
442 //______________________________________________________________________________
444 AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
445 Float_t dpx, Float_t dpy,
446 const AliMUONTrackParam& trackParam) const
449 /// Decides if the digit belongs to the tracker track.
452 AliMUONTrackParam trackParamAtPadZ(trackParam);
453 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad);
455 Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
456 Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
458 const Float_t kNSigma = GetRecoParam()->GetSigmaCutForTrigger();
460 const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
462 Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
463 Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
465 Float_t maxDistX = kNSigma * sigmaX; // in cm
466 Float_t maxDistY = kNSigma * sigmaY; // in cm
468 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
469 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
471 Float_t matchDist = fkMaxDistance;
472 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
478 //_____________________________________________________________________________
479 Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(const AliMUONVDigitStore& digitStore, Int_t &detElemId,
480 Float_t coor[2], Bool_t isMatch[2],
481 TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const
484 /// Check slat and board number of digit matching trigger track
487 enum {kBending, kNonBending};
489 Float_t minMatchDist[fgkNcathodes];
490 Int_t padsInCheckArea[fgkNcathodes];
492 for(Int_t cath=0; cath<fgkNcathodes; cath++){
493 isMatch[cath] = kFALSE;
494 minMatchDist[cath] = fkMaxDistance/10.;
495 padsInCheckArea[cath] = 0;
497 Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
498 Int_t ch = iChamber-10;
499 Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
501 Int_t iSlat = detElemId%100;
502 Int_t trigDigitBendPlane = -1;
503 Int_t foundDetElemId = detElemId;
504 Float_t foundZmatch=999.;
505 Float_t yCoorAtPadZ=999.;
507 TIter next(digitStore.CreateIterator());
508 AliMUONVDigit* mDigit;
511 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
514 Int_t currDetElemId = mDigit->DetElemId();
515 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
516 if(currCh!=iChamber) continue;
517 Int_t currSlat = currDetElemId%100;
518 Int_t slatDiff = TMath::Abs(currSlat-iSlat);
519 if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats
520 Int_t cathode = mDigit->Cathode();
521 Int_t ix = mDigit->PadX();
522 Int_t iy = mDigit->PadY();
523 Float_t xpad, ypad, zpad;
524 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
525 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
527 AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
528 Float_t xlocal1 = pad.GetPositionX();
529 Float_t ylocal1 = pad.GetPositionY();
530 Float_t dpx = pad.GetDimensionX();
531 Float_t dpy = pad.GetDimensionY();
533 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
534 AliDebug(2, Form("\nDetElemId = %i Cathode = %i Pad = (%i,%i) = (%.2f,%.2f) Dim = (%.2f,%.2f) Track = (%.2f,%.2f)\n",currDetElemId,cathode,ix,iy,xpad,ypad,dpx,dpy,coor[0],coor[1]));
535 // searching track intersection with chambers (second approximation)
538 Float_t deltaZ = zpad - zRealMatch[0];
539 y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11;
540 if(TMath::Abs(y-coor[1])>0.1) AliDebug(3, Form("oldDeltaZ = %7.2f newDeltaZ = %7.2f\toldY = %7.2f new y = %7.2f\n",oldDeltaZ,deltaZ,coor[1],y));
542 Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y);
543 if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++;
544 if(matchDist>minMatchDist[cathode])continue;
545 isMatch[cathode] = kTRUE;
546 minMatchDist[cathode] = matchDist;
547 foundDetElemId = currDetElemId;
550 if(cathode==kBending) trigDigitBendPlane = idigit;
551 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
552 nboard[cathode][loc] = pad.GetLocalBoardId(loc);
554 for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
555 nboard[cathode][loc]=-1;
559 if(isMatch[kBending] || isMatch[kNonBending]){
560 detElemId = foundDetElemId;
561 zRealMatch[ch] = foundZmatch;
562 coor[1] = yCoorAtPadZ;
565 // If track matches many pads, it is not good for effciency determination.
566 // However we still want to calculate the hit pattern.
567 for(Int_t cath=0; cath<fgkNcathodes; cath++){
568 if(padsInCheckArea[cath]>2) {
569 AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
574 return trigDigitBendPlane;
577 //_____________________________________________________________________________
578 Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad,
579 Float_t dpx, Float_t dpy,
580 Float_t xTrackAtPad, Float_t yTrackAtPad) const
583 /// Decides if the digit belongs to the trigger track.
586 Float_t maxDist = GetRecoParam()->GetStripCutForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
587 if(maxDist<2.) maxDist = 2.;
588 Float_t maxDistCheckArea = GetRecoParam()->GetMaxStripAreaForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
590 Float_t matchDist = fkMaxDistance;
592 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
593 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
594 Float_t maxDistX = maxDist;
595 Float_t maxDistY = maxDist;
597 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
598 else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
603 //_____________________________________________________________________________
604 Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
605 Int_t chamber, Int_t cathode) const
608 /// Given the (x,y) position in the chamber,
609 /// it returns the corresponding slat
612 Int_t resultingDetElemId = -1;
614 Float_t minDist = 999.;
615 for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
616 Int_t detElemId = it.CurrentDEId();
617 Int_t ich = detElemId/100-10;
618 Float_t tolerance=0.2*((Float_t)ich);
619 Float_t currDist=9999.;
621 const AliMpVSegmentation* seg =
622 AliMpSegmentation::Instance()
623 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
626 Float_t deltax = seg->GetDimensionX();
627 Float_t deltay = seg->GetDimensionY();
628 Float_t xlocal1 = -deltax;
629 Float_t ylocal1 = -deltay;
630 Float_t xlocal2 = +deltax;
631 Float_t ylocal2 = +deltay;
632 Float_t xg01, yg01, zg1, xg02, yg02, zg2;
633 fkTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
634 fkTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
636 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
647 if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
648 if(y<yg1) currDist = yg1-y;
649 else if(y>yg2) currDist = y-yg2;
650 if(currDist<minDist) {
651 resultingDetElemId = detElemId;
655 resultingDetElemId = detElemId;
658 } // loop on detElemId
659 return resultingDetElemId;
663 //_____________________________________________________________________________
664 void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
665 Int_t detElemId, Int_t cathode,
666 Int_t localBoard[4]) const
669 /// Given the (x,y) position in the chamber,
670 /// it returns the corresponding local board
673 for(Int_t loc=0; loc<fgkNlocations; loc++){
677 fkTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl);
679 const AliMpVSegmentation* seg =
680 AliMpSegmentation::Instance()
681 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
683 AliMpPad pad = seg->PadByPosition(pos.X(),pos.Y(),kFALSE);
684 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
685 localBoard[loc] = pad.GetLocalBoardId(loc);
691 //_____________________________________________________________________________
692 Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
693 const AliMUONTriggerTrack* matchedTrigTrack,
694 AliMUONVDigitStore& digitStore) const
697 /// It searches for matching digits around the trigger track.
700 enum {kBending, kNonBending};
702 Int_t chOrder[fgkNchambers] = {0,2,1,3};
704 TArrayF zRealMatch(fgkNchambers);
705 TArrayF correctFactor(fgkNcathodes);
707 Bool_t isMatch[fgkNcathodes];
708 for(Int_t cath=0; cath<fgkNcathodes; cath++){
709 isMatch[cath] = kFALSE;
712 TArrayF zMeanChamber(fgkNchambers);
713 for(Int_t ch=0; ch<fgkNchambers; ch++){
714 zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch);
717 TArrayI digitPerTrack(fgkNcathodes);
719 Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
721 TArrayI triggeredDigits;
722 triggeredDigits.Set(fgkNchambers);
723 triggeredDigits.Reset(-1);
725 TArrayI trigScheme[fgkNcathodes];
726 TArrayI slatThatTriggered[fgkNcathodes];
727 for(Int_t cath=0; cath<fgkNcathodes; cath++){
728 trigScheme[cath].Set(fgkNchambers);
729 slatThatTriggered[cath].Set(fgkNchambers);
732 Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
733 TArrayI nboard[fgkNcathodes];
734 for(Int_t cath=0; cath<fgkNcathodes; cath++){
735 nboard[cath].Set(fgkNlocations);
737 Int_t ineffBoard[fgkNlocations];
738 for(Int_t loc=0; loc<fgkNlocations; loc++){
739 ineffBoard[loc] = -1;
742 digitPerTrack.Reset();
743 for(Int_t ch=0; ch<fgkNchambers; ch++){
744 zRealMatch[ch] = zMeanChamber[ch];
745 for(Int_t cath=0; cath<fgkNcathodes; cath++){
746 for(Int_t loc=0; loc<fgkNlocations; loc++){
747 boardThatTriggered[ch][cath][loc]=-1;
752 for(Int_t cath=0; cath<fgkNcathodes; cath++){
753 slatThatTriggered[cath].Reset(-1);
754 trigScheme[cath].Reset();
757 Bool_t isClearEvent = kTRUE;
759 //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane)
760 Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
761 Float_t thetaX = matchedTrigTrack->GetThetax();
762 Float_t thetaY = matchedTrigTrack->GetThetay();
764 for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
765 Int_t currCh = chOrder[ch];
766 AliDebug(3, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
768 for(Int_t cath=0; cath<fgkNcathodes; cath++){
769 correctFactor[cath]=1.;
771 // calculate corrections to trigger track theta
772 if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position
773 if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position
775 // searching track intersection with chambers (first approximation)
776 Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
777 trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane)
778 trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane)
779 Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
780 if(detElemIdFromTrack<0) {
781 AliDebug(1, "Warning: trigger track outside trigger chamber\n");
782 isClearEvent = kFALSE;
784 // track is rejected since the extrapolated track
785 // does not match a slat (border effects)
786 AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackOutsideGeometry);
790 triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
792 // if FindPadMatchingTrig = -500 => too many digits matching pad =>
793 // => Event not clear => Do not use for efficiency calculation
794 if(triggeredDigits[currCh]<-100){
795 isClearEvent = kFALSE;
796 // track is rejected since it matches many pads
797 AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackMatchesManyPads);
798 AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
801 for(Int_t cath=0; cath<fgkNcathodes; cath++){
802 if(!isMatch[cath]) continue;
803 AliESDMuonTrack::SetFiredChamber(pattern, cath, currCh);
804 digitPerTrack[cath]++;
805 trigScheme[cath][currCh]++;
806 slatThatTriggered[cath][currCh] = detElemIdFromTrack;
807 for(Int_t loc=0; loc<fgkNlocations; loc++){
808 boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
811 } // end chamber loop
813 for(Int_t cath=0; cath<fgkNcathodes; cath++){
814 if(digitPerTrack[cath]<3) {
815 isClearEvent = kFALSE;
816 // track is rejected since the number of associated
817 // digits found is less than 3.
818 AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackMatchesFewPads);
819 AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
823 if(!isClearEvent) return kFALSE;
825 AliESDMuonTrack::EAliTriggerChPatternFlag goodForEff = AliESDMuonTrack::kBoardEff;
827 Int_t ineffSlat = -1;
828 Int_t ineffDetElId = -1;
829 Int_t firstSlat = slatThatTriggered[kBending][0]%100;
830 if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
831 Int_t firstBoard = boardThatTriggered[0][kBending][0];
832 if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
833 for(Int_t ch=0; ch<fgkNchambers; ch++){
834 Bool_t isCurrChIneff = kFALSE;
835 Int_t currSlat = slatThatTriggered[kBending][ch]%100;
837 ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
838 currSlat = ineffDetElId%100;
839 ineffSlat = currSlat;
840 isCurrChIneff = kTRUE;
842 if(currSlat!=firstSlat) {
843 AliESDMuonTrack::AddEffInfo(pattern,
844 AliESDMuonTrack::kCrossDifferentSlats,
845 AliESDMuonTrack::kChEff); // track crosses different slats
848 Bool_t atLeastOneLoc=kFALSE;
849 if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
850 for(Int_t loc=0; loc<fgkNlocations; loc++){
851 Int_t currBoard = boardThatTriggered[ch][kBending][loc];
852 if(isCurrChIneff) currBoard = ineffBoard[loc];
853 if(currBoard==firstBoard){
858 if(!atLeastOneLoc) goodForEff = AliESDMuonTrack::kSlatEff;
859 } // end chamber loop
861 AliESDMuonTrack::AddEffInfo(pattern, firstSlat, goodForEff);