MUON/AliMUONTrackHitPattern.cxx

   1 /**************************************************************************
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   3  *                                                                        *
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  15
  16 /* $Id$ */
  17
  18
  19 //-----------------------------------------------------------------------------
  20 /// \class AliMUONTrackHitPattern
  21 ///
  22 /// This class propagates tracks to trigger chambers
  23 /// searching for matching trigger tracks and fired strips.
  24 ///
  25 /// To each track, a hit pattern for trigger chambers is set.
  26 /// The hit pattern is a UShort_t with 8 bits used:
  27 ///                                                                      <pre>
  28 ///            1  1  0  1    1  1  0  1
  29 ///           |           |            |
  30 ///            ----------- ------------
  31 /// chamber:  11 12 13 14 | 11 12 13 14
  32 /// cathode:    bending   | non-bending
  33 ///                                                                      </pre>
  34 /// The main method is:
  35 /// * ExecuteValidation
  36 ///
  37 ///  \author Diego Stocco
  38 //-----------------------------------------------------------------------------
  39
  40
  41 #include "AliMUONTrackHitPattern.h"
  42
  43 #include "AliMUONConstants.h"
  44 #include "AliMUONVDigit.h"
  45 #include "AliMUONDigitMaker.h"
  46 #include "AliMUONDigitStoreV1.h"
  47 #include "AliMUONGeometryTransformer.h"
  48 #include "AliMUONLocalTrigger.h"
  49 #include "AliMUONLocalTriggerBoard.h"
  50 #include "AliMUONTrack.h"
  51 #include "AliMUONTrackExtrap.h"
  52 #include "AliMUONTrackParam.h"
  53 #include "AliMUONVTrackStore.h"
  54 #include "AliMUONVTriggerStore.h"
  55 #include "AliMpPad.h"
  56 #include "AliMpSegmentation.h"
  57 #include "AliMpVSegmentation.h"
  58 #include "AliMpDEManager.h"
  59 #include "AliMUONReconstructor.h"
  60 #include "AliMUONRecoParam.h"
  61 #include "AliMUONTriggerTrack.h"
  62 #include "AliMUONVTriggerTrackStore.h"
  63
  64 #include "AliMpConstants.h"
  65
  66 #include "AliMagF.h"
  67 #include "AliLog.h"
  68 #include "AliTracker.h"
  69
  70 #include <Riostream.h>
  71 #include <TArrayS.h>
  72 #include <TClonesArray.h>
  73 #include <TMath.h>
  74 #include <TMatrixD.h>
  75 #include <TROOT.h>
  76 #include <TDirectory.h>
  77 #include <TFile.h>
  78 #include <TSystem.h>
  79
  80 #include <cassert>
  81
  82 /// \cond CLASSIMP
  83 ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context
  84 /// \endcond
  85
  86
  87 //______________________________________________________________________________
  88 AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONGeometryTransformer& transformer,
  89                                                const AliMUONDigitMaker& digitMaker)
  90     : TObject(),
  91       fTransformer(transformer),
  92       fDigitMaker(digitMaker),
  93       fkMaxDistance(99999.)
  94 {
  95     /// Default constructor
  96     InitMembers();
  97
  98     // Set magnetic field
  99     const AliMagF* kField = AliTracker::GetFieldMap();
 100     if (!kField) AliFatal("No field available");
 101     AliMUONTrackExtrap::SetField(kField);
 102 }
 103
 104
 105 //______________________________________________________________________________
 106 AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void)
 107 {
 108   /// Destructor
 109   delete fTrigCovariance;
 110   for(Int_t cath=0; cath<fgkNcathodes; cath++){
 111     delete fPadFired[cath];
 112   }
 113 }
 114
 115
 116 //______________________________________________________________________________
 117 void AliMUONTrackHitPattern::InitMembers()
 118 {
 119   //
 120   /// Initialize data members
 121   //
 122   fDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10));
 123
 124   const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso();
 125   const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso();
 126   const Double_t kTrigSlopeBendReso = 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ;
 127   const Double_t kTrigCovSlopeBend = - kTrigBendReso * kTrigBendReso / fDeltaZ;
 128
 129   // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks
 130   fTrigCovariance = new TMatrixD(3,3);
 131   fTrigCovariance->Zero();
 132   (*fTrigCovariance)(0,0) = kTrigNonBendReso * kTrigNonBendReso;
 133   (*fTrigCovariance)(1,1) = kTrigBendReso * kTrigBendReso;
 134   (*fTrigCovariance)(2,2) = kTrigSlopeBendReso * kTrigSlopeBendReso;
 135   (*fTrigCovariance)(1,2) = (*fTrigCovariance)(2,1) = kTrigCovSlopeBend;
 136
 137   const Int_t kMaxNpads[fgkNcathodes] = {GetMaxX(0)*GetMaxY(0), GetMaxX(1)*GetMaxY(1)};
 138   Char_t histoName[40];
 139   Char_t *cathCode[fgkNcathodes] = {"bendPlane", "nonBendPlane"};
 140
 141   const Int_t kNslats = 18;
 142
 143   for(Int_t cath=0; cath<fgkNcathodes; cath++){
 144     sprintf(histoName, "fPadFired%s", cathCode[cath]);
 145     fPadFired[cath] = new TH3F(histoName, histoName,
 146                                fgkNchambers, -0.5, (Float_t)fgkNchambers - 0.5,
 147                                kNslats, -0.5, (Float_t)kNslats - 0.5,
 148                                kMaxNpads[cath], -0.5, (Float_t)kMaxNpads[cath] - 0.5);
 149   }
 150 }
 151
 152
 153 //_____________________________________________________________________________
 154 void AliMUONTrackHitPattern::CheckConstants() const
 155 {
 156 /// Check consistence of redefined constants
 157
 158   assert(fgkNcathodes == AliMpConstants::NofCathodes());
 159   assert(fgkNchambers == AliMpConstants::NofTriggerChambers());
 160   assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes);
 161 }
 162
 163
 164 //______________________________________________________________________________
 165 void AliMUONTrackHitPattern::ExecuteValidation(AliMUONVTrackStore& trackStore,
 166                                                const AliMUONVTriggerTrackStore& triggerTrackStore,
 167                                                const AliMUONVTriggerStore& triggerStore) const
 168 {
 169   //
 170   /// Main method:
 171   /// Loops on reco tracks, extrapolates them to trigger chambers
 172   /// and searches for matching trigger tracks and digits
 173   //
 174
 175   AliMUONDigitStoreV1 digitStore;
 176   TriggerDigits(triggerStore,digitStore);
 177
 178
 179   TIter itTrack(trackStore.CreateIterator());
 180   AliMUONTrack* track;
 181
 182   const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh();
 183
 184   while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
 185   {
 186     AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last())));
 187
 188     ApplyMCSCorrections(trackParam);
 189     AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber
 190
 191     AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore);
 192
 193     UShort_t pattern = GetHitPattern(trackParam, matchedTriggerTrack, digitStore);
 194     track->SetHitsPatternInTrigCh(pattern);
 195   }
 196 }
 197
 198
 199 //______________________________________________________________________________
 200 AliMUONTriggerTrack *
 201 AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track,
 202                                           AliMUONTrackParam& trackParam,
 203                                           const AliMUONVTriggerTrackStore& triggerTrackStore,
 204                                           const AliMUONVTriggerStore& triggerStore) const
 205 {
 206   //
 207   /// Match track with trigger track
 208   //
 209
 210   Int_t matchTrigger = 0;
 211   Int_t loTrgNum(-1);
 212   Double_t distTriggerTrack[3], sigma2[3];
 213   Double_t chi2;
 214   Double_t chi2MatchTrigger = 0., minChi2MatchTrigger = 999.;
 215   Int_t doubleMatch = -1; // Check if track matches 2 trigger tracks
 216   Double_t doubleChi2 = -1.;
 217   AliMUONTriggerTrack* doubleTriggerTrack = 0x0;
 218   AliMUONTriggerTrack* matchedTriggerTrack = 0x0;
 219
 220   const TMatrixD& kParamCov = trackParam.GetCovariances();
 221
 222   Double_t xTrack = trackParam.GetNonBendingCoor();
 223   Double_t yTrack = trackParam.GetBendingCoor();
 224   Double_t ySlopeTrack = trackParam.GetBendingSlope();
 225
 226   // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks
 227   TMatrixD trackCov(3,3);
 228   trackCov.Zero();
 229   trackCov(0,0) = kParamCov(0,0);
 230   trackCov(1,1) = kParamCov(2,2);
 231   trackCov(2,2) = kParamCov(3,3);
 232   trackCov(1,2) = kParamCov(2,3);
 233   trackCov(2,1) = kParamCov(3,2);
 234
 235   TMatrixD sumCov(trackCov,TMatrixD::kPlus,*fTrigCovariance);
 236
 237   Bool_t isCovOK = kTRUE;
 238
 239   if (sumCov.Determinant() != 0) {
 240     sumCov.Invert();
 241   } else {
 242     AliWarning(" Determinant = 0");
 243     isCovOK = kFALSE;
 244     sigma2[0] = kParamCov(0,0);
 245     sigma2[1] = kParamCov(2,2);
 246     sigma2[2] = kParamCov(3,3);
 247     // sigma of distributions (trigger-track) X,Y,slopeY
 248     const Double_t kDistSigma[3]={AliMUONConstants::TriggerNonBendingReso(),
 249                                   AliMUONConstants::TriggerBendingReso(),
 250                                   1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ};
 251     for (Int_t iVar = 0; iVar < 3; iVar++) sigma2[iVar] += kDistSigma[iVar] * kDistSigma[iVar];
 252   }
 253
 254   AliMUONTriggerTrack *triggerTrack;
 255   TIter itTriggerTrack(triggerTrackStore.CreateIterator());
 256   while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
 257   {
 258     distTriggerTrack[0] = triggerTrack->GetX11() - xTrack;
 259     distTriggerTrack[1] = triggerTrack->GetY11() - yTrack;
 260     distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay()) - ySlopeTrack;
 261
 262     if(isCovOK){
 263       TMatrixD paramDiff(3,1);
 264       for(Int_t iVar = 0; iVar < 3; iVar++)
 265         paramDiff(iVar,0) = distTriggerTrack[iVar];
 266
 267       TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff);
 268       TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp);
 269       chi2 = chi2M(0,0);
 270     }
 271     else {
 272       chi2 = 0.;
 273       for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar];
 274     }
 275
 276     chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
 277     if (chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger())
 278     {
 279       Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
 280       if (chi2 < minChi2MatchTrigger && chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger())
 281       {
 282         if(isDoubleTrack)
 283         {
 284           doubleMatch = loTrgNum;
 285           doubleChi2 = chi2MatchTrigger;
 286           doubleTriggerTrack = matchedTriggerTrack;
 287         }
 288         minChi2MatchTrigger = chi2;
 289         chi2MatchTrigger = chi2;
 290         loTrgNum = triggerTrack->GetLoTrgNum();
 291         matchedTriggerTrack = triggerTrack;
 292         AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
 293         matchTrigger = 1;
 294         if(locTrg->LoLpt()>0) matchTrigger = 2;
 295         if(locTrg->LoHpt()>0) matchTrigger = 3;
 296       }
 297       else if(isDoubleTrack)
 298       {
 299         doubleMatch = triggerTrack->GetLoTrgNum();
 300         doubleChi2 = chi2;
 301       }
 302     }
 303   }
 304   if(doubleMatch>=0)
 305   { // If two trigger tracks match, select the one passing more trigger cuts
 306     AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch));
 307     AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch);
 308     if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3))
 309     {
 310       if(locTrg1->LoHpt()>0) matchTrigger=3;
 311       else matchTrigger = 2;
 312       loTrgNum = doubleMatch;
 313       chi2MatchTrigger = doubleChi2;
 314       matchedTriggerTrack = doubleTriggerTrack;
 315     }
 316   }
 317
 318   track->SetMatchTrigger(matchTrigger);
 319   track->SetLoTrgNum(loTrgNum);
 320   track->SetChi2MatchTrigger(chi2MatchTrigger);
 321
 322   AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
 323
 324   if (locTrg)
 325   {
 326     track->SetLocalTrigger(locTrg->LoCircuit(),
 327                            locTrg->LoStripX(),
 328                            locTrg->LoStripY(),
 329                            locTrg->LoDev(),
 330                            locTrg->LoLpt(),
 331                            locTrg->LoHpt());
 332   }
 333
 334   return matchedTriggerTrack;
 335 }
 336
 337
 338 //______________________________________________________________________________
 339 UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTrackParam &trackParam,
 340                                                AliMUONTriggerTrack* matchedTriggerTrack,
 341                                                AliMUONVDigitStore& digitStore) const
 342 {
 343   //
 344   /// Get hit pattern on trigger chambers for the current track
 345   //
 346   UShort_t pattern = 0;
 347   Bool_t isMatch[2];
 348   const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
 349
 350   Bool_t patternFromTrigTrack = kFALSE;
 351
 352
 353   // Calculate hit pattern from trigger track
 354   if(matchedTriggerTrack){
 355     patternFromTrigTrack = PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore);
 356   }
 357
 358   if(patternFromTrigTrack) return pattern;
 359
 360
 361   // Calculate hit pattern from tracker track propagation
 362   // if hit pattern from trigger track failed
 363
 364   for(Int_t ch=0; ch<4; ++ch)
 365   {
 366     Int_t iChamber = kNTrackingCh+ch;
 367     AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(iChamber));
 368     FindPadMatchingTrack(digitStore, trackParam, isMatch, iChamber);
 369     for(Int_t cath=0; cath<2; ++cath)
 370     {
 371       if(isMatch[cath]) SetBit(pattern, cath, ch);
 372     }
 373   }
 374   return pattern;
 375 }
 376
 377
 378 //______________________________________________________________________________
 379 void AliMUONTrackHitPattern::SetBit(UShort_t& pattern, Int_t cathode, Int_t chamber) const
 380 {
 381   //
 382   /// Set hits pattern
 383   //
 384   const Int_t kMask[2][4]= {{0x80, 0x40, 0x20, 0x10},
 385                             {0x08, 0x04, 0x02, 0x01}};
 386   pattern |= kMask[cathode][chamber];
 387 }
 388
 389
 390 //______________________________________________________________________________
 391 void AliMUONTrackHitPattern::AddEffInfo(UShort_t& pattern, Int_t slat, Int_t effType) const
 392 {
 393   //
 394   /// Set info on efficiency calculation
 395   //
 396   pattern += effType << 8;
 397   pattern += slat << 10;
 398 }
 399
 400
 401 //______________________________________________________________________________
 402 void
 403 AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const
 404 {
 405   //
 406   /// Returns uncertainties on extrapolated position.
 407   /// Takes into account Branson plane corrections in the iron wall.
 408   //
 409
 410   const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd();
 411   const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm
 412
 413   AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end
 414   AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects
 415   return;
 416 }
 417
 418
 419 //______________________________________________________________________________
 420 Bool_t
 421 AliMUONTrackHitPattern::TriggerDigits(const AliMUONVTriggerStore& triggerStore,
 422                                       AliMUONVDigitStore& digitStore) const
 423 {
 424   //
 425   /// make (S)Digit for trigger
 426   //
 427
 428   digitStore.Clear();
 429
 430   AliMUONLocalTrigger* locTrg;
 431   TIter next(triggerStore.CreateLocalIterator());
 432
 433   while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
 434   {
 435     if (locTrg->IsNull()) continue;
 436
 437     TArrayS xyPattern[2];
 438     locTrg->GetXPattern(xyPattern[0]);
 439     locTrg->GetYPattern(xyPattern[1]);
 440
 441     // do we need this ? (Ch.F.)
 442 //     for(Int_t cath=0; cath<2; ++cath)
 443 //     {
 444 //       for(Int_t ch=0; ch<4; ++ch)
 445 //       {
 446 //         if(xyPattern[cath][ch]==0) continue;
 447 //       }
 448 //     }
 449
 450     Int_t nBoard = locTrg->LoCircuit();
 451     fDigitMaker.TriggerDigits(nBoard, xyPattern, digitStore);
 452   }
 453   return kTRUE;
 454 }
 455
 456
 457 //______________________________________________________________________________
 458 void
 459 AliMUONTrackHitPattern::FindPadMatchingTrack(AliMUONVDigitStore& digitStore,
 460                                              const AliMUONTrackParam& trackParam,
 461                                              Bool_t isMatch[2], Int_t iChamber) const
 462 {
 463     //
 464     /// Given the tracker track position, searches for matching digits.
 465     //
 466
 467     Float_t minMatchDist[2];
 468
 469     for(Int_t cath=0; cath<2; ++cath)
 470     {
 471       isMatch[cath]=kFALSE;
 472       minMatchDist[cath]=fkMaxDistance/10.;
 473     }
 474
 475     TIter next(digitStore.CreateIterator());
 476     AliMUONVDigit* mDigit;
 477
 478     while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
 479     {
 480       Int_t currDetElemId = mDigit->DetElemId();
 481       Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
 482       if(currCh!=iChamber) continue;
 483       Int_t cathode = mDigit->Cathode();
 484       Int_t ix = mDigit->PadX();
 485       Int_t iy = mDigit->PadY();
 486       Float_t xpad, ypad, zpad;
 487       const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
 488         ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
 489
 490       AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE);
 491       Float_t xlocal1 = pad.Position().X();
 492       Float_t ylocal1 = pad.Position().Y();
 493       Float_t dpx = pad.Dimensions().X();
 494       Float_t dpy = pad.Dimensions().Y();
 495       fTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
 496       Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam);
 497       if(matchDist>minMatchDist[cathode])continue;
 498       isMatch[cathode] = kTRUE;
 499       if(isMatch[0] && isMatch[1]) break;
 500       minMatchDist[cathode] = matchDist;
 501     }
 502 }
 503
 504
 505 //______________________________________________________________________________
 506 Float_t
 507 AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
 508                                            Float_t dpx, Float_t dpy,
 509                                            const AliMUONTrackParam& trackParam) const
 510 {
 511     //
 512     /// Decides if the digit belongs to the tracker track.
 513     //
 514
 515     AliMUONTrackParam trackParamAtPadZ(trackParam);
 516     AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad);
 517
 518     Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
 519     Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
 520
 521     const Float_t kNSigma = AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTrigger();
 522
 523     const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
 524
 525     Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
 526     Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
 527
 528     Float_t maxDistX = kNSigma * sigmaX; // in cm
 529     Float_t maxDistY = kNSigma * sigmaY; // in cm
 530
 531     Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
 532     Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
 533
 534     Float_t matchDist = fkMaxDistance;
 535     if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
 536
 537     return matchDist;
 538 }
 539
 540
 541 //_____________________________________________________________________________
 542 Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(AliMUONVDigitStore& digitStore, Int_t &detElemId,
 543                                                   Float_t coor[2], Bool_t isMatch[2],
 544                                                   TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const
 545 {
 546     //
 547     /// Check slat and board number of digit matching trigger track
 548     //
 549
 550     enum {kBending, kNonBending};
 551
 552     Float_t minMatchDist[fgkNcathodes];
 553     Int_t padsInCheckArea[fgkNcathodes];
 554
 555     for(Int_t cath=0; cath<fgkNcathodes; cath++){
 556         isMatch[cath] = kFALSE;
 557         minMatchDist[cath] = fkMaxDistance/10.;
 558         padsInCheckArea[cath] = 0;
 559     }
 560     Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
 561     Int_t ch = iChamber-10;
 562     Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
 563     Float_t y = coor[1];
 564     Int_t iSlat = detElemId%100;
 565     Int_t trigDigitBendPlane = -1;
 566     Int_t foundDetElemId = detElemId;
 567     Float_t foundZmatch=999.;
 568     Float_t yCoorAtPadZ=999.;
 569
 570     TIter next(digitStore.CreateIterator());
 571     AliMUONVDigit* mDigit;
 572     Int_t idigit=0;
 573
 574     while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
 575     {
 576         idigit++;
 577         Int_t currDetElemId = mDigit->DetElemId();
 578         Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
 579         if(currCh!=iChamber) continue;
 580         Int_t currSlat = currDetElemId%100;
 581         Int_t slatDiff = TMath::Abs(currSlat-iSlat);
 582         if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats
 583         Int_t cathode = mDigit->Cathode();
 584         Int_t ix = mDigit->PadX();
 585         Int_t iy = mDigit->PadY();
 586         Float_t xpad, ypad, zpad;
 587         const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
 588             ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
 589
 590         AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE);
 591         Float_t xlocal1 = pad.Position().X();
 592         Float_t ylocal1 = pad.Position().Y();
 593         Float_t dpx = pad.Dimensions().X();
 594         Float_t dpy = pad.Dimensions().Y();
 595         fTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
 596         AliDebug(2, Form("DetElemId = %i\tCathode = %i\t(x,y) Pad = (%i,%i) = (%.2f,%.2f)\tDim = (%.2f,%.2f)\tTrack = (%.2f,%.2f)\n",currDetElemId,cathode,ix,iy,xpad,ypad,dpx,dpy,coor[0],coor[1]));
 597         // searching track intersection with chambers (second approximation)
 598         if(ch%2==1){
 599             //if(iChamber%2==1){
 600             Float_t deltaZ = zpad - zRealMatch[0];
 601             y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11;
 602             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));
 603         }
 604         Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y);
 605         if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++;
 606         if(matchDist>minMatchDist[cathode])continue;
 607         isMatch[cathode] = kTRUE;
 608         minMatchDist[cathode] = matchDist;
 609         foundDetElemId = currDetElemId;
 610         foundZmatch=zpad;
 611         yCoorAtPadZ=y;
 612         if(cathode==kBending) trigDigitBendPlane = idigit;
 613         for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
 614             AliMpIntPair location = pad.GetLocation(loc);
 615             nboard[cathode][loc] = location.GetFirst();
 616         }
 617         for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
 618             nboard[cathode][loc]=-1;
 619         }
 620
 621         // Fired pads info
 622         Int_t currPair = ix*GetMaxY(cathode) + iy;
 623         fPadFired[cathode]->Fill(ch, currSlat, currPair);
 624     }
 625
 626     for(Int_t cath=0; cath<fgkNcathodes; cath++){
 627         if(padsInCheckArea[cath]>2) {
 628           AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
 629             return -500;
 630         }
 631     }
 632
 633     if(isMatch[kBending] || isMatch[kNonBending]){
 634         detElemId = foundDetElemId;
 635         zRealMatch[ch] = foundZmatch;
 636         coor[1] = yCoorAtPadZ;
 637     }
 638     return trigDigitBendPlane;
 639 }
 640
 641 //_____________________________________________________________________________
 642 Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad,
 643                                                 Float_t dpx, Float_t dpy,
 644                                                 Float_t xTrackAtPad, Float_t yTrackAtPad) const
 645 {
 646     //
 647     /// Decides if the digit belongs to the trigger track.
 648     //
 649
 650     Float_t maxDist = 2.;//3. // cm
 651     Float_t maxDistCheckArea = 6.; // cm
 652
 653     Float_t matchDist = fkMaxDistance;
 654
 655     Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
 656     Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
 657     Float_t maxDistX = maxDist;
 658     Float_t maxDistY = maxDist;
 659
 660     if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
 661     else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
 662     return matchDist;
 663 }
 664
 665
 666 //_____________________________________________________________________________
 667 Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
 668                                                  Int_t chamber, Int_t cathode) const
 669 {
 670     //
 671     /// Given the (x,y) position in the chamber,
 672     /// it returns the corresponding slat
 673     //
 674
 675     Int_t resultingDetElemId = -1;
 676     AliMpDEIterator it;
 677     Float_t minDist = 999.;
 678     for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
 679         Int_t detElemId = it.CurrentDEId();
 680         Int_t ich = detElemId/100-10;
 681         Float_t tolerance=0.2*((Float_t)ich);
 682         Float_t currDist=9999.;
 683
 684         const AliMpVSegmentation* seg =
 685             AliMpSegmentation::Instance()
 686             ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
 687         if (!seg) continue;
 688
 689         Float_t deltax = seg->Dimensions().X();
 690         Float_t deltay = seg->Dimensions().Y();
 691         Float_t xlocal1 =  -deltax;
 692         Float_t ylocal1 =  -deltay;
 693         Float_t xlocal2 =  +deltax;
 694         Float_t ylocal2 =  +deltay;
 695         Float_t xg01, yg01, zg1, xg02, yg02, zg2;
 696         fTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
 697         fTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
 698
 699         Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
 700
 701         if(xg01>xg02){
 702             xg1 = xg02;
 703             xg2 = xg01;
 704         }
 705         if(yg01>yg02){
 706             yg1 = yg02;
 707             yg2 = yg01;
 708         }
 709
 710         if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
 711             if(y<yg1) currDist = yg1-y;
 712             else if(y>yg2) currDist = y-yg2;
 713             if(currDist<minDist) {
 714                 resultingDetElemId = detElemId;
 715                 minDist=currDist;
 716                 continue;
 717             }
 718             resultingDetElemId = detElemId;
 719             break;
 720         }
 721     } // loop on detElemId
 722     return resultingDetElemId;
 723 }
 724
 725
 726 //_____________________________________________________________________________
 727 void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
 728                                                  Int_t detElemId, Int_t cathode,
 729                                                  Int_t localBoard[4]) const
 730 {
 731     //
 732     /// Given the (x,y) position in the chamber,
 733     /// it returns the corresponding local board
 734     //
 735
 736     for(Int_t loc=0; loc<fgkNlocations; loc++){
 737         localBoard[loc]=-1;
 738     }
 739     Float_t xl, yl, zl;
 740     fTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl);
 741     TVector2 pos(xl,yl);
 742     const AliMpVSegmentation* seg =
 743         AliMpSegmentation::Instance()
 744           ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
 745     if (seg){
 746         AliMpPad pad = seg->PadByPosition(pos,kFALSE);
 747         for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
 748             AliMpIntPair location = pad.GetLocation(loc);
 749             localBoard[loc] = location.GetFirst();
 750         }
 751     }
 752 }
 753
 754
 755 //_____________________________________________________________________________
 756 Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
 757                                                      AliMUONTriggerTrack *matchedTrigTrack,
 758                                                      AliMUONVDigitStore& digitStore) const
 759 {
 760   //
 761   /// It searches for matching digits around the trigger track.
 762   //
 763
 764   enum {kBending, kNonBending};
 765
 766   Int_t chOrder[fgkNchambers] = {0,2,1,3};
 767
 768   TArrayF zRealMatch(fgkNchambers);
 769   TArrayF correctFactor(fgkNcathodes);
 770
 771   Bool_t isMatch[fgkNcathodes];
 772   for(Int_t cath=0; cath<fgkNcathodes; cath++){
 773     isMatch[cath] = kFALSE;
 774   }
 775
 776   TArrayF zMeanChamber(fgkNchambers);
 777   for(Int_t ch=0; ch<fgkNchambers; ch++){
 778     zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch);
 779   }
 780
 781   TArrayI digitPerTrack(fgkNcathodes);
 782
 783   Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
 784
 785   TArrayI triggeredDigits;
 786   triggeredDigits.Set(fgkNchambers);
 787   triggeredDigits.Reset(-1);
 788
 789   TArrayI trigScheme[fgkNcathodes];
 790   TArrayI slatThatTriggered[fgkNcathodes];
 791   for(Int_t cath=0; cath<fgkNcathodes; cath++){
 792     trigScheme[cath].Set(fgkNchambers);
 793     slatThatTriggered[cath].Set(fgkNchambers);
 794   }
 795
 796   Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
 797   TArrayI nboard[fgkNcathodes];
 798   for(Int_t cath=0; cath<fgkNcathodes; cath++){
 799     nboard[cath].Set(fgkNlocations);
 800   }
 801   Int_t ineffBoard[fgkNlocations];
 802   for(Int_t loc=0; loc<fgkNlocations; loc++){
 803     ineffBoard[loc] = -1;
 804   }
 805
 806   digitPerTrack.Reset();
 807   for(Int_t ch=0; ch<fgkNchambers; ch++){
 808     zRealMatch[ch] = zMeanChamber[ch];
 809     for(Int_t cath=0; cath<fgkNcathodes; cath++){
 810       for(Int_t loc=0; loc<fgkNlocations; loc++){
 811         boardThatTriggered[ch][cath][loc]=-1;
 812       }
 813     }
 814   }
 815
 816   for(Int_t cath=0; cath<fgkNcathodes; cath++){
 817     slatThatTriggered[cath].Reset(-1);
 818     trigScheme[cath].Reset();
 819   }
 820
 821   Bool_t isClearEvent = kTRUE;
 822
 823   //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane)
 824   Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
 825   Float_t thetaX = matchedTrigTrack->GetThetax();
 826   Float_t thetaY = matchedTrigTrack->GetThetay();
 827
 828   for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
 829     Int_t currCh = chOrder[ch];
 830     AliDebug(2, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
 831
 832     for(Int_t cath=0; cath<fgkNcathodes; cath++){
 833       correctFactor[cath]=1.;
 834     }
 835     // calculate corrections to trigger track theta
 836     if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position
 837     if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position
 838
 839     // searching track intersection with chambers (first approximation)
 840     Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
 841     trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane)
 842     trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane)
 843     Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
 844     if(detElemIdFromTrack<0) {
 845       AliDebug(1, "Warning: trigger track outside trigger chamber\n");
 846       continue;
 847     }
 848
 849     triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
 850
 851     // if FindPadMatchingTrig = -500 => too many digits matching pad =>
 852     //                               => Event not clear => Reject track
 853     if(triggeredDigits[currCh]<-100){
 854       isClearEvent = kFALSE;
 855       AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
 856       break;
 857     }
 858
 859     for(Int_t cath=0; cath<fgkNcathodes; cath++){
 860       if(!isMatch[cath]) continue;
 861       SetBit(pattern, cath, currCh);
 862       digitPerTrack[cath]++;
 863       trigScheme[cath][currCh]++;
 864       slatThatTriggered[cath][currCh] = detElemIdFromTrack;
 865       for(Int_t loc=0; loc<fgkNlocations; loc++){
 866         boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
 867       }
 868     }
 869   } // end chamber loop
 870
 871   for(Int_t cath=0; cath<fgkNcathodes; cath++){
 872     if(digitPerTrack[cath]<3) isClearEvent = kFALSE;
 873     if(!isClearEvent) AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
 874   }
 875
 876   if(!isClearEvent) return kFALSE;
 877
 878   Int_t goodForEff = kBoardEff;
 879
 880   Int_t ineffSlat = -1;
 881   Int_t ineffDetElId = -1;
 882   Int_t firstSlat = slatThatTriggered[kBending][0]%100;
 883   if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
 884   Int_t firstBoard = boardThatTriggered[0][kBending][0];
 885   if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
 886   for(Int_t ch=0; ch<fgkNchambers; ch++){
 887     Bool_t isCurrChIneff = kFALSE;
 888     Int_t currSlat = slatThatTriggered[kBending][ch]%100;
 889     if(currSlat<0){
 890       ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
 891       currSlat = ineffDetElId%100;
 892       ineffSlat = currSlat;
 893       isCurrChIneff = kTRUE;
 894     }
 895     if(currSlat!=firstSlat) {
 896       AddEffInfo(pattern, 20, kChEff);
 897       return kTRUE;
 898     }
 899     Bool_t atLeastOneLoc=kFALSE;
 900     if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
 901     for(Int_t loc=0; loc<fgkNlocations; loc++){
 902       Int_t currBoard = boardThatTriggered[ch][kBending][loc];
 903       if(isCurrChIneff) currBoard = ineffBoard[loc];
 904       if(currBoard==firstBoard){
 905         atLeastOneLoc=kTRUE;
 906         break;
 907       }
 908     }
 909     if(!atLeastOneLoc) goodForEff = kSlatEff;
 910   } // end chamber loop
 911
 912   AddEffInfo(pattern, firstSlat, goodForEff);
 913   return kTRUE;
 914 }
 915
 916
 917 //_____________________________________________________________________________
 918 void AliMUONTrackHitPattern::UpdateQA() const
 919 {
 920   //
 921   /// Save map of fired strips in the QA file
 922   //
 923
 924   TDirectory *dir = gDirectory;
 925
 926   TFile *logFile = 0x0;
 927   TString logFileName;
 928   Bool_t reopenFile = kFALSE;
 929   TString baseFileName = "MUON.QA";
 930   TString dirName = "EfficiencyRelated";
 931
 932   TSeqCollection *list = gROOT->GetListOfFiles();
 933   Int_t n = list->GetEntries();
 934   for(Int_t i=0; i<n; i++) {
 935     logFile = (TFile*)list->At(i);
 936     logFileName = logFile->GetName();
 937     if (logFileName.Contains(baseFileName.Data())) break;
 938     logFile = 0x0;
 939   }
 940
 941   if(!logFile) {
 942     void * dirp = gSystem->OpenDirectory(gSystem->pwd());
 943     const char * name = 0x0;
 944     // Add all files matching *pattern* to the chain
 945     while((name = gSystem->GetDirEntry(dirp))) {
 946       logFileName = name;
 947       if (logFileName.Contains(baseFileName.Data())) {
 948         logFile = new TFile(logFileName.Data(), "update");
 949         AliWarning(Form("%s already stored on disk. Re-opening in update mode.",baseFileName.Data()));
 950         break;
 951       }
 952       logFile = 0x0;
 953     }//directory loop
 954     reopenFile = kTRUE;
 955   }
 956
 957   if(logFile){
 958     logFile->cd();
 959     TDirectory *muonDir = (TDirectory*)logFile->Get("MUON");
 960     muonDir->cd();
 961     TDirectory *effDir = (TDirectory*)muonDir->Get(dirName.Data());
 962     if(!effDir) {
 963       effDir = muonDir->mkdir(dirName.Data());
 964     }
 965     effDir->cd();
 966     TH3F *histo = 0x0;
 967     for(Int_t cath=0; cath<fgkNcathodes; cath++){
 968       histo = (TH3F*) effDir->Get(fPadFired[cath]->GetName());
 969       if(!histo) histo = (TH3F*)fPadFired[cath]->Clone();
 970       else histo->Add(fPadFired[cath]);
 971       histo->Write(histo->GetName(), TObject::kOverwrite);
 972     }
 973     if(reopenFile){
 974       logFile->Close();
 975     }
 976   }
 977   else AliWarning(Form("Map of strips entering efficiency calculation could not be found in %s", baseFileName.Data()));
 978   dir->cd();
 979 }
 980