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 "AliMUONVDigitStore.h"
39 #include "AliMUONGeometryTransformer.h"
40 #include "AliMUONLocalTrigger.h"
41 #include "AliMUONLocalTriggerBoard.h"
42 #include "AliMUONRecoParam.h"
43 #include "AliMUONTrack.h"
44 #include "AliMUONTrackExtrap.h"
45 #include "AliMUONTrackParam.h"
46 #include "AliMUONVTrackStore.h"
47 #include "AliMUONVTriggerStore.h"
49 #include "AliMpSegmentation.h"
50 #include "AliMpVSegmentation.h"
51 #include "AliMpDEManager.h"
52 #include "AliMUONReconstructor.h"
53 #include "AliMUONTriggerTrack.h"
54 #include "AliMUONVTriggerTrackStore.h"
56 #include "AliMpConstants.h"
59 #include "AliTracker.h"
60 #include "AliESDMuonTrack.h"
62 #include <Riostream.h>
64 #include <TObjArray.h>
68 #include <TDirectory.h>
76 ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context
80 //______________________________________________________________________________
81 AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONRecoParam* recoParam,
82 const AliMUONGeometryTransformer& transformer,
83 const AliMUONVDigitStore& digitStore)
85 fkRecoParam(recoParam),
86 fkTransformer(transformer),
87 fkDigitStore(digitStore),
90 /// Default constructor
91 AliMUONTrackExtrap::SetField();
95 //______________________________________________________________________________
96 AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void)
101 //_____________________________________________________________________________
102 void AliMUONTrackHitPattern::CheckConstants() const
104 /// Check consistence of redefined constants
106 assert(fgkNcathodes == AliMpConstants::NofCathodes());
107 assert(fgkNchambers == AliMpConstants::NofTriggerChambers());
108 assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes);
112 //______________________________________________________________________________
113 void AliMUONTrackHitPattern::ExecuteValidation(const AliMUONVTrackStore& trackStore,
114 const AliMUONVTriggerTrackStore& triggerTrackStore,
115 const AliMUONVTriggerStore& triggerStore) const
119 /// Loops on reco tracks, extrapolates them to trigger chambers
120 /// and searches for matching trigger tracks and digits
123 // Get the hit pattern for all trigger tracks
124 AliMUONTriggerTrack* triggerTrack;
125 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
126 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) ){
127 UShort_t pattern = GetHitPattern(triggerTrack);
128 triggerTrack->SetHitsPatternInTrigCh(pattern);
129 AliDebug(1, Form("Hit pattern: hits 0x%x slat %2i board %3i effFlag %i",
130 pattern & 0xFF, AliESDMuonTrack::GetSlatOrInfo(pattern),
131 triggerTrack->GetLoTrgNum(), AliESDMuonTrack::GetEffFlag(pattern)));
134 // Match tracker tracks with trigger tracks.
135 TIter itTrack(trackStore.CreateIterator());
138 const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh();
140 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
142 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last())));
144 ApplyMCSCorrections(trackParam);
145 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber
147 AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore);
149 // Copy trigger tracks hit pattern if there is matching,
150 // otherwise calculate the hit pattern directly from tracker track:
151 // the obtained pattern is good for check, but not good for efficiency determination.
152 UShort_t pattern = matchedTriggerTrack ?
153 matchedTriggerTrack->GetHitsPatternInTrigCh() :
154 GetHitPattern(&trackParam);
156 track->SetHitsPatternInTrigCh(pattern);
161 //______________________________________________________________________________
162 AliMUONTriggerTrack *
163 AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track,
164 AliMUONTrackParam& trackParam,
165 const AliMUONVTriggerTrackStore& triggerTrackStore,
166 const AliMUONVTriggerStore& triggerStore) const
169 /// Match track with trigger track
172 Int_t matchTrigger = 0;
174 TMatrixD paramDiff(3,1);
176 Double_t chi2MatchTrigger = 0., minChi2MatchTrigger = 999.;
177 Int_t doubleMatch = -1; // Check if track matches 2 trigger tracks
178 Double_t doubleChi2 = -1.;
179 AliMUONTriggerTrack* doubleTriggerTrack = 0x0;
180 AliMUONTriggerTrack* matchedTriggerTrack = 0x0;
183 // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks
184 TMatrixD trackCov(3,3);
186 AliMUONTriggerTrack *triggerTrack;
187 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
188 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
190 AliMUONTrackExtrap::LinearExtrapToZCov(&trackParam, triggerTrack->GetZ11());
191 const TMatrixD& kParamCov = trackParam.GetCovariances();
193 Double_t xTrack = trackParam.GetNonBendingCoor();
194 Double_t yTrack = trackParam.GetBendingCoor();
195 Double_t ySlopeTrack = trackParam.GetBendingSlope();
197 paramDiff(0,0) = triggerTrack->GetX11() - xTrack;
198 paramDiff(1,0) = triggerTrack->GetY11() - yTrack;
199 paramDiff(2,0) = triggerTrack->GetSlopeY() - ySlopeTrack;
201 // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks
203 trackCov(0,0) = kParamCov(0,0);
204 trackCov(1,1) = kParamCov(2,2);
205 trackCov(2,2) = kParamCov(3,3);
206 trackCov(1,2) = kParamCov(2,3);
207 trackCov(2,1) = kParamCov(3,2);
209 // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks
210 TMatrixD trigCov(triggerTrack->GetCovariances());
212 TMatrixD sumCov(trackCov,TMatrixD::kPlus,trigCov);
213 if (sumCov.Determinant() != 0) {
216 TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff);
217 TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp);
220 AliWarning(" Determinant = 0");
221 Double_t sigma2 = 0.;
223 for (Int_t iVar = 0; iVar < 3; iVar++) {
224 sigma2 = trackCov(iVar,iVar) + trigCov(iVar,iVar);
225 chi2 += paramDiff(iVar,0) * paramDiff(iVar,0) / sigma2;
229 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
230 if (chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
232 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
233 if (chi2 < minChi2MatchTrigger && chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
237 doubleMatch = loTrgNum;
238 doubleChi2 = chi2MatchTrigger;
239 doubleTriggerTrack = matchedTriggerTrack;
241 minChi2MatchTrigger = chi2;
242 chi2MatchTrigger = chi2;
243 loTrgNum = triggerTrack->GetLoTrgNum();
244 matchedTriggerTrack = triggerTrack;
245 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
247 if(locTrg->LoLpt()>0) matchTrigger = 2;
248 if(locTrg->LoHpt()>0) matchTrigger = 3;
250 else if(isDoubleTrack)
252 doubleMatch = triggerTrack->GetLoTrgNum();
258 { // If two trigger tracks match, select the one passing more trigger cuts
259 AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch));
260 AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch);
261 if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3))
263 if(locTrg1->LoHpt()>0) matchTrigger=3;
264 else matchTrigger = 2;
265 loTrgNum = doubleMatch;
266 chi2MatchTrigger = doubleChi2;
267 matchedTriggerTrack = doubleTriggerTrack;
271 track->SetMatchTrigger(matchTrigger);
272 track->SetChi2MatchTrigger(chi2MatchTrigger);
274 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
278 track->SetLocalTrigger(locTrg->LoCircuit(),
281 locTrg->GetDeviation(),
284 locTrg->GetTriggerWithoutChamber());
287 return matchedTriggerTrack;
291 //______________________________________________________________________________
292 UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTriggerTrack* matchedTriggerTrack) const
295 /// Get hit pattern on trigger chambers for the current trigger track
297 UShort_t pattern = 0;
298 PerformTrigTrackMatch(pattern, matchedTriggerTrack);
303 //______________________________________________________________________________
304 UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTrackParam* trackParam) const
307 /// Get hit pattern on trigger chambers for the current tracker track
309 UShort_t pattern = 0;
311 const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
313 for(Int_t ch=0; ch<4; ++ch)
315 Int_t iChamber = kNTrackingCh+ch;
316 AliMUONTrackExtrap::ExtrapToZCov(trackParam, AliMUONConstants::DefaultChamberZ(iChamber));
317 FindPadMatchingTrack(*trackParam, isMatch, iChamber);
318 for(Int_t cath=0; cath<2; ++cath)
320 if(isMatch[cath]) AliESDMuonTrack::SetFiredChamber(pattern, cath, ch);
324 // pattern obtained by propagation of tracker track
325 // when it does not match the trigger.
326 AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackerTrackPattern);
331 //______________________________________________________________________________
333 AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const
336 /// Returns uncertainties on extrapolated position.
337 /// Takes into account Branson plane corrections in the iron wall.
340 const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd();
341 const Float_t kFilterThickness = kZFilterOut-AliMUONConstants::MuonFilterZBeg(); // cm
343 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end
344 AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects
349 //______________________________________________________________________________
351 AliMUONTrackHitPattern::FindPadMatchingTrack(const AliMUONTrackParam& trackParam,
352 Bool_t isMatch[2], Int_t iChamber) const
355 /// Given the tracker track position, searches for matching digits.
358 Float_t minMatchDist[2];
360 for(Int_t cath=0; cath<2; ++cath)
362 isMatch[cath]=kFALSE;
363 minMatchDist[cath]=fkMaxDistance/10.;
366 TIter next(fkDigitStore.CreateTriggerIterator());
367 AliMUONVDigit* mDigit;
369 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
371 Int_t currDetElemId = mDigit->DetElemId();
372 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
373 if(currCh!=iChamber) continue;
374 Int_t cathode = mDigit->Cathode();
375 Int_t ix = mDigit->PadX();
376 Int_t iy = mDigit->PadY();
377 Float_t xpad, ypad, zpad;
378 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
379 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
381 AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
382 Float_t xlocal1 = pad.GetPositionX();
383 Float_t ylocal1 = pad.GetPositionY();
384 Float_t dpx = pad.GetDimensionX();
385 Float_t dpy = pad.GetDimensionY();
387 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
388 Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam);
389 if(matchDist>minMatchDist[cathode])continue;
390 isMatch[cathode] = kTRUE;
391 if(isMatch[0] && isMatch[1]) break;
392 minMatchDist[cathode] = matchDist;
397 //______________________________________________________________________________
399 AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
400 Float_t dpx, Float_t dpy,
401 const AliMUONTrackParam& trackParam) const
404 /// Decides if the digit belongs to the tracker track.
407 AliMUONTrackParam trackParamAtPadZ(trackParam);
408 AliMUONTrackExtrap::LinearExtrapToZCov(&trackParamAtPadZ, zPad);
410 Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
411 Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
413 const Float_t kNSigma = GetRecoParam()->GetSigmaCutForTrigger();
415 const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
417 Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
418 Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
420 Float_t maxDistX = kNSigma * sigmaX; // in cm
421 Float_t maxDistY = kNSigma * sigmaY; // in cm
423 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
424 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
426 Float_t matchDist = fkMaxDistance;
427 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
433 //_____________________________________________________________________________
434 Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(Int_t &detElemId,
435 Float_t coor[2], Bool_t isMatch[2],
436 TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const
439 /// Check slat and board number of digit matching trigger track
442 enum {kBending, kNonBending};
444 Float_t minMatchDist[fgkNcathodes];
445 Int_t padsInCheckArea[fgkNcathodes];
447 for(Int_t cath=0; cath<fgkNcathodes; cath++){
448 isMatch[cath] = kFALSE;
449 minMatchDist[cath] = fkMaxDistance/10.;
450 padsInCheckArea[cath] = 0;
453 Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
454 if ( iChamber < 0 ) {
455 AliErrorStream() << "Cannot get chamberId from detElemId=" << detElemId << endl;
459 Int_t ch = iChamber-10;
460 Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
462 Int_t iSlat = detElemId%100;
463 Int_t trigDigitBendPlane = -1;
464 Int_t foundDetElemId = detElemId;
465 Float_t foundZmatch=999.;
466 Float_t yCoorAtPadZ=999.;
468 TIter next(fkDigitStore.CreateTriggerIterator());
469 AliMUONVDigit* mDigit;
472 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
475 Int_t currDetElemId = mDigit->DetElemId();
476 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
477 if(currCh!=iChamber) continue;
478 Int_t currSlat = currDetElemId%100;
479 Int_t slatDiff = TMath::Abs(currSlat-iSlat);
480 if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats
481 Int_t cathode = mDigit->Cathode();
482 Int_t ix = mDigit->PadX();
483 Int_t iy = mDigit->PadY();
484 Float_t xpad, ypad, zpad;
485 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
486 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
488 AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
489 Float_t xlocal1 = pad.GetPositionX();
490 Float_t ylocal1 = pad.GetPositionY();
491 Float_t dpx = pad.GetDimensionX();
492 Float_t dpy = pad.GetDimensionY();
494 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
495 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]));
496 // searching track intersection with chambers (second approximation)
499 Float_t deltaZ = zpad - zRealMatch[0];
500 y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11;
501 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));
503 Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y);
504 if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++;
505 if(matchDist>minMatchDist[cathode])continue;
506 isMatch[cathode] = kTRUE;
507 minMatchDist[cathode] = matchDist;
508 foundDetElemId = currDetElemId;
511 if(cathode==kBending) trigDigitBendPlane = idigit;
512 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
513 nboard[cathode][loc] = pad.GetLocalBoardId(loc);
515 for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
516 nboard[cathode][loc]=-1;
520 if(isMatch[kBending] || isMatch[kNonBending]){
521 detElemId = foundDetElemId;
522 zRealMatch[ch] = foundZmatch;
523 coor[1] = yCoorAtPadZ;
526 // If track matches many pads, it is not good for effciency determination.
527 // However we still want to calculate the hit pattern.
528 for(Int_t cath=0; cath<fgkNcathodes; cath++){
529 if(padsInCheckArea[cath]>2) {
530 AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
535 return trigDigitBendPlane;
538 //_____________________________________________________________________________
539 Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad,
540 Float_t dpx, Float_t dpy,
541 Float_t xTrackAtPad, Float_t yTrackAtPad) const
544 /// Decides if the digit belongs to the trigger track.
547 Float_t maxDist = GetRecoParam()->GetStripCutForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
548 if(maxDist<2.) maxDist = 2.;
549 Float_t maxDistCheckArea = GetRecoParam()->GetMaxStripAreaForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
551 Float_t matchDist = fkMaxDistance;
553 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
554 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
555 Float_t maxDistX = maxDist;
556 Float_t maxDistY = maxDist;
558 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
559 else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
564 //_____________________________________________________________________________
565 Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
566 Int_t chamber, Int_t cathode) const
569 /// Given the (x,y) position in the chamber,
570 /// it returns the corresponding slat
573 Int_t resultingDetElemId = -1;
575 Float_t minDist = 999.;
576 for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
577 Int_t detElemId = it.CurrentDEId();
578 Int_t ich = detElemId/100-10;
579 Float_t tolerance=0.2*((Float_t)ich);
580 Float_t currDist=9999.;
582 const AliMpVSegmentation* seg =
583 AliMpSegmentation::Instance()
584 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
587 Float_t deltax = seg->GetDimensionX();
588 Float_t deltay = seg->GetDimensionY();
589 Float_t xlocal1 = -deltax;
590 Float_t ylocal1 = -deltay;
591 Float_t xlocal2 = +deltax;
592 Float_t ylocal2 = +deltay;
593 Float_t xg01, yg01, zg1, xg02, yg02, zg2;
594 fkTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
595 fkTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
597 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
608 if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
609 if(y<yg1) currDist = yg1-y;
610 else if(y>yg2) currDist = y-yg2;
611 if(currDist<minDist) {
612 resultingDetElemId = detElemId;
616 resultingDetElemId = detElemId;
619 } // loop on detElemId
620 return resultingDetElemId;
624 //_____________________________________________________________________________
625 void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
626 Int_t detElemId, Int_t cathode,
627 Int_t localBoard[4]) const
630 /// Given the (x,y) position in the chamber,
631 /// it returns the corresponding local board
634 for(Int_t loc=0; loc<fgkNlocations; loc++){
638 fkTransformer.Local2Global(detElemId, 0., 0., 0., xg, yg, zg);
639 Float_t z = zg - (y-yg)*TMath::Tan(TMath::DegToRad()*AliMUONConstants::St345Inclination());
641 fkTransformer.Global2Local(detElemId, x, y, z, xl, yl, zl);
642 const AliMpVSegmentation* seg =
643 AliMpSegmentation::Instance()
644 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
646 AliMpPad pad = seg->PadByPosition(xl,yl,kFALSE);
647 if ( ! pad.IsValid() ){
648 AliWarning(Form("Pad not found! DetElemId %i position global (%f, %f, %f) local (%f, %f, %f)\n", detElemId, x, y, z, xl, yl, zl));
652 AliDebug(2, Form("\nWould match: DetElemId = %i Pad = (%i,%i) = (%.2f,%.2f,%.2f) Board %3i\n",detElemId,pad.GetIx(),pad.GetIy(),xl,yl,zl,pad.GetLocalBoardId(0)));
654 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
655 localBoard[loc] = pad.GetLocalBoardId(loc);
660 //_____________________________________________________________________________
661 Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
662 const AliMUONTriggerTrack* matchedTrigTrack) const
665 /// It searches for matching digits around the trigger track.
668 enum {kBending, kNonBending};
670 Int_t chOrder[fgkNchambers] = {0,2,1,3};
672 TArrayF zRealMatch(fgkNchambers);
674 Bool_t isMatch[fgkNcathodes];
675 for(Int_t cath=0; cath<fgkNcathodes; cath++){
676 isMatch[cath] = kFALSE;
679 TArrayF zMeanChamber(fgkNchambers);
680 zMeanChamber[0] = matchedTrigTrack->GetZ11();
681 zMeanChamber[1] = matchedTrigTrack->GetZ11() + AliMUONConstants::DefaultChamberZ(11) - AliMUONConstants::DefaultChamberZ(10);
682 zMeanChamber[2] = matchedTrigTrack->GetZ21();
683 zMeanChamber[3] = matchedTrigTrack->GetZ21() + AliMUONConstants::DefaultChamberZ(13) - AliMUONConstants::DefaultChamberZ(12);
685 TArrayI digitPerTrack(fgkNcathodes);
687 Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
689 TArrayI triggeredDigits;
690 triggeredDigits.Set(fgkNchambers);
691 triggeredDigits.Reset(-1);
693 TArrayI trigScheme[fgkNcathodes];
694 TArrayI slatThatTriggered[fgkNcathodes];
695 for(Int_t cath=0; cath<fgkNcathodes; cath++){
696 trigScheme[cath].Set(fgkNchambers);
697 slatThatTriggered[cath].Set(fgkNchambers);
700 Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
701 TArrayI nboard[fgkNcathodes];
702 for(Int_t cath=0; cath<fgkNcathodes; cath++){
703 nboard[cath].Set(fgkNlocations);
705 Int_t ineffBoard[fgkNlocations];
706 for(Int_t loc=0; loc<fgkNlocations; loc++){
707 ineffBoard[loc] = -1;
710 digitPerTrack.Reset();
711 for(Int_t ch=0; ch<fgkNchambers; ch++){
712 zRealMatch[ch] = zMeanChamber[ch];
713 for(Int_t cath=0; cath<fgkNcathodes; cath++){
714 for(Int_t loc=0; loc<fgkNlocations; loc++){
715 boardThatTriggered[ch][cath][loc]=-1;
720 for(Int_t cath=0; cath<fgkNcathodes; cath++){
721 slatThatTriggered[cath].Reset(-1);
722 trigScheme[cath].Reset();
725 Bool_t isClearEvent = kTRUE;
727 Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
728 Float_t slopeX = matchedTrigTrack->GetSlopeX();
729 Float_t slopeY = matchedTrigTrack->GetSlopeY();
731 for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
732 Int_t currCh = chOrder[ch];
733 AliDebug(3, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
735 // searching track intersection with chambers (first approximation)
736 Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
737 trackIntersectCh[currCh][0] = zMeanChamber[currCh] * slopeX;
738 trackIntersectCh[currCh][1] = y11 + deltaZ * slopeY;
739 Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
740 if(detElemIdFromTrack<0) {
741 AliDebug(1, "Warning: trigger track outside trigger chamber\n");
742 isClearEvent = kFALSE;
744 // track is rejected since the extrapolated track
745 // does not match a slat (border effects)
746 AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackOutsideGeometry);
750 triggeredDigits[currCh] = FindPadMatchingTrig(detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
752 // if FindPadMatchingTrig = -500 => too many digits matching pad =>
753 // => Event not clear => Do not use for efficiency calculation
754 if(triggeredDigits[currCh]<-100){
755 isClearEvent = kFALSE;
756 // track is rejected since it matches many pads
757 AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackMatchesManyPads);
758 AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
761 for(Int_t cath=0; cath<fgkNcathodes; cath++){
762 if(!isMatch[cath]) continue;
763 AliESDMuonTrack::SetFiredChamber(pattern, cath, currCh);
764 digitPerTrack[cath]++;
765 trigScheme[cath][currCh]++;
766 slatThatTriggered[cath][currCh] = detElemIdFromTrack;
767 for(Int_t loc=0; loc<fgkNlocations; loc++){
768 boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
771 } // end chamber loop
773 for(Int_t cath=0; cath<fgkNcathodes; cath++){
774 if(digitPerTrack[cath]<3) {
775 isClearEvent = kFALSE;
776 // track is rejected since the number of associated
777 // digits found is less than 3.
778 AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackMatchesFewPads);
779 AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
783 if(!isClearEvent) return kFALSE;
785 AliESDMuonTrack::EAliTriggerChPatternFlag goodForEff = AliESDMuonTrack::kBoardEff;
787 Int_t ineffSlat = -1;
788 Int_t ineffDetElId = -1;
789 Int_t firstSlat = slatThatTriggered[kBending][0]%100;
790 if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
791 Int_t firstBoard = boardThatTriggered[0][kBending][0];
792 if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
793 for(Int_t ch=0; ch<fgkNchambers; ch++){
794 Bool_t isCurrChIneff = kFALSE;
795 Int_t currSlat = slatThatTriggered[kBending][ch]%100;
797 ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
798 currSlat = ineffDetElId%100;
799 ineffSlat = currSlat;
800 isCurrChIneff = kTRUE;
802 if(currSlat!=firstSlat) {
803 AliESDMuonTrack::AddEffInfo(pattern,
804 AliESDMuonTrack::kCrossDifferentSlats,
805 AliESDMuonTrack::kChEff); // track crosses different slats
808 Bool_t atLeastOneLoc=kFALSE;
809 if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
810 for(Int_t loc=0; loc<fgkNlocations; loc++){
811 Int_t currBoard = boardThatTriggered[ch][kBending][loc];
812 if(isCurrChIneff) currBoard = ineffBoard[loc];
813 if(currBoard==firstBoard){
818 if(!atLeastOneLoc) goodForEff = AliESDMuonTrack::kSlatEff;
819 } // end chamber loop
821 AliESDMuonTrack::AddEffInfo(pattern, firstSlat, goodForEff);