MUON/AliMUONTracker.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 //-----------------------------------------------------------------------------
  19 /// \class AliMUONTracker
  20 ///
  21 /// Steering class for use in global tracking framework;
  22 /// reconstruct tracks from recpoints
  23 ///
  24 /// Actual tracking is performed by some AliMUONVTrackReconstructor children
  25 /// Tracking modes (ORIGINAL, KALMAN) and associated options and parameters
  26 /// can be changed by using:
  27 /// AliMUONRecoParam *muonRecoParam = AliMUONRecoParam::GetLow(High)FluxParam();
  28 /// muonRecoParam->Set...(); // see methods in AliMUONRecoParam.h for details
  29 /// AliMUONReconstructor::SetRecoParam(muonRecoParam);
  30 ///
  31 /// \author Christian Finck and Laurent Aphecetche, SUBATECH Nantes
  32 //-----------------------------------------------------------------------------
  33
  34 #include "AliMUONTracker.h"
  35
  36 #include "AliCodeTimer.h"
  37 #include "AliESDEvent.h"
  38 #include "AliESDMuonTrack.h"
  39 #include "AliESDVertex.h"
  40 #include "AliLog.h"
  41 #include "AliMUONClusterStoreV2.h"
  42 #include "AliMUONESDInterface.h"
  43 #include "AliMUONLegacyClusterServer.h"
  44 #include "AliMUONRecoParam.h"
  45 #include "AliMUONReconstructor.h"
  46 #include "AliMUONTrack.h"
  47 #include "AliMUONTrackExtrap.h"
  48 #include "AliMUONTrackHitPattern.h"
  49 #include "AliMUONTrackParam.h"
  50 #include "AliMUONTrackReconstructor.h"
  51 #include "AliMUONTrackReconstructorK.h"
  52 #include "AliMUONTrackStoreV1.h"
  53 #include "AliMUONTriggerTrackStoreV1.h"
  54 #include "AliMUONTriggerTrack.h"
  55 #include "AliMUONLocalTrigger.h"
  56 #include "AliMUONVCluster.h"
  57 #include "AliMUONVClusterServer.h"
  58 #include "AliMUONVDigitStore.h"
  59 #include "AliMUONVTriggerStore.h"
  60 #include <Riostream.h>
  61 #include <TRandom.h>
  62 #include <TTree.h>
  63
  64 /// \cond CLASSIMP
  65 ClassImp(AliMUONTracker)
  66 /// \endcond
  67
  68
  69 //_____________________________________________________________________________
  70 AliMUONTracker::AliMUONTracker(AliMUONVClusterServer* clusterServer,
  71                                const AliMUONVDigitStore& digitStore,
  72                                const AliMUONDigitMaker* digitMaker,
  73                                const AliMUONGeometryTransformer* transformer,
  74                                const AliMUONTriggerCircuit* triggerCircuit)
  75 : AliTracker(),
  76   fDigitMaker(digitMaker), // not owner
  77   fTransformer(transformer), // not owner
  78   fTriggerCircuit(triggerCircuit), // not owner
  79   fTrackHitPatternMaker(0x0),
  80   fTrackReco(0x0),
  81   fClusterStore(0x0),
  82   fTriggerStore(0x0),
  83   fClusterServer(clusterServer),
  84   fIsOwnerOfClusterServer(kFALSE),
  85   fDigitStore(digitStore), // not owner
  86   fInputClusterStore(0x0),
  87   fTriggerTrackStore(0x0)
  88 {
  89   /// constructor
  90   if (fTransformer && fDigitMaker)
  91     fTrackHitPatternMaker = new AliMUONTrackHitPattern(*fTransformer,*fDigitMaker);
  92
  93   if (!fClusterServer)
  94   {
  95     AliInfo("No cluster server given. Will use AliMUONLegacyClusterServer");
  96     fIsOwnerOfClusterServer = kTRUE;
  97   }
  98   else
  99   {
 100     TIter next(fDigitStore.CreateIterator());
 101     fClusterServer->UseDigits(next);
 102
 103     SetupClusterServer(*fClusterServer);
 104   }
 105 }
 106
 107 //_____________________________________________________________________________
 108 AliMUONTracker::~AliMUONTracker()
 109 {
 110   /// dtor
 111   delete fTrackReco;
 112   delete fTrackHitPatternMaker;
 113   delete fClusterStore;
 114   delete fTriggerStore;
 115   if ( fIsOwnerOfClusterServer ) delete fClusterServer;
 116   delete fInputClusterStore;
 117   delete fTriggerTrackStore;
 118 }
 119
 120 //_____________________________________________________________________________
 121 AliMUONVClusterStore*
 122 AliMUONTracker::ClusterStore() const
 123 {
 124   /// Return (and create if necessary) the cluster container
 125   if (!fClusterStore)
 126   {
 127     fClusterStore = new AliMUONClusterStoreV2;
 128   }
 129   return fClusterStore;
 130 }
 131
 132 //_____________________________________________________________________________
 133 AliMUONVTriggerTrackStore*
 134 AliMUONTracker::TriggerTrackStore() const
 135 {
 136   /// Return (and create if necessary) the trigger track container
 137   if (!fTriggerTrackStore)
 138   {
 139     fTriggerTrackStore = new AliMUONTriggerTrackStoreV1;
 140   }
 141   return fTriggerTrackStore;
 142 }
 143
 144 //_____________________________________________________________________________
 145 Int_t AliMUONTracker::LoadClusters(TTree* clustersTree)
 146 {
 147   /// Load triggerStore from clustersTree
 148
 149   delete fTriggerStore;
 150   delete fInputClusterStore;
 151   fInputClusterStore=0x0;
 152
 153   if ( ! clustersTree ) {
 154     AliFatal("No clustersTree");
 155     return 1;
 156   }
 157
 158   fTriggerStore = AliMUONVTriggerStore::Create(*clustersTree);
 159
 160   if (!fTriggerStore)
 161   {
 162     AliError("Could not get triggerStore");
 163     return 2;
 164   }
 165
 166   if ( fIsOwnerOfClusterServer )
 167   {
 168     fInputClusterStore = AliMUONVClusterStore::Create(*clustersTree);
 169     if ( fInputClusterStore )
 170     {
 171       AliInfo(Form("Created %s from cluster tree",fInputClusterStore->ClassName()));
 172       fInputClusterStore->Clear();
 173       fInputClusterStore->Connect(*clustersTree,kFALSE);
 174     }
 175     delete fClusterServer;
 176     fClusterServer = new AliMUONLegacyClusterServer(*fTransformer,fInputClusterStore);
 177     SetupClusterServer(*fClusterServer);
 178   }
 179
 180   fTriggerStore->Connect(*clustersTree,kFALSE);
 181
 182   clustersTree->GetEvent(0);
 183
 184   return 0;
 185 }
 186
 187 //_____________________________________________________________________________
 188 Int_t AliMUONTracker::Clusters2Tracks(AliESDEvent* esd)
 189 {
 190   /// Performs the tracking and store the resulting tracks in the ESD
 191   AliDebug(1,"");
 192   AliCodeTimerAuto("")
 193
 194   if (!fTrackReco)
 195   {
 196     fTrackReco = CreateTrackReconstructor(AliMUONReconstructor::GetRecoParam()->GetTrackingMode(),fClusterServer);
 197   }
 198
 199   // if the required tracking mode does not exist
 200   if  (!fTrackReco) return 1;
 201
 202   if ( ! ClusterStore() )
 203   {
 204     AliError("ClusterStore is NULL");
 205     return 2;
 206   }
 207
 208   if (!fTriggerStore) {
 209     AliError("TriggerStore is NULL");
 210     return 3;
 211   }
 212
 213   // Make trigger tracks
 214   if ( fTriggerCircuit )
 215   {
 216     TriggerTrackStore()->Clear();
 217     fTrackReco->EventReconstructTrigger(*fTriggerCircuit,*fTriggerStore,*(TriggerTrackStore()));
 218   }
 219
 220   // Make tracker tracks
 221   AliMUONVTrackStore* trackStore = new AliMUONTrackStoreV1;
 222   fTrackReco->EventReconstruct(*(ClusterStore()),*trackStore);
 223
 224   // Match tracker/trigger tracks
 225   if ( fTrackHitPatternMaker )
 226   {
 227     fTrackReco->ValidateTracksWithTrigger(*trackStore,*(TriggerTrackStore()),*fTriggerStore,*fTrackHitPatternMaker);
 228   }
 229
 230   // Fill ESD
 231   FillESD(*trackStore,esd);
 232
 233   // cleanup
 234   delete trackStore;
 235
 236   return 0;
 237 }
 238
 239 //_____________________________________________________________________________
 240 void AliMUONTracker::FillESD(AliMUONVTrackStore& trackStore, AliESDEvent* esd) const
 241 {
 242   /// Fill the ESD from the trackStore
 243   AliDebug(1,"");
 244   AliCodeTimerAuto("")
 245
 246   AliMUONTrack* track;
 247   AliESDMuonTrack esdTrack;
 248   Double_t vertex[3] = {0., 0., 0.};
 249   TIter next(trackStore.CreateIterator());
 250
 251   // get ITS vertex
 252   const AliESDVertex* esdVert = esd->GetVertex();
 253   if (esdVert->GetNContributors()) {
 254     esdVert->GetXYZ(vertex);
 255     AliDebug(1,Form("found vertex (%e,%e,%e)",vertex[0],vertex[1],vertex[2]));
 256   }
 257
 258   // fill ESD event including all info in ESD cluster if required and only for the given fraction of events
 259   if (AliMUONReconstructor::GetRecoParam()->SaveFullClusterInESD() &&
 260       gRandom->Uniform(100.) <= AliMUONReconstructor::GetRecoParam()->GetPercentOfFullClusterInESD()) {
 261
 262     while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
 263       AliMUONESDInterface::MUONToESD(*track, esdTrack, vertex, &fDigitStore);
 264       // set the trigger x/y strips pattern
 265       if (esdTrack.GetMatchTrigger()) {
 266         AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(fTriggerStore->FindLocal(esdTrack.LoCircuit()));
 267         esdTrack.SetTriggerX1Pattern(locTrg->GetX1Pattern());
 268         esdTrack.SetTriggerY1Pattern(locTrg->GetY1Pattern());
 269         esdTrack.SetTriggerX2Pattern(locTrg->GetX2Pattern());
 270         esdTrack.SetTriggerY2Pattern(locTrg->GetY2Pattern());
 271         esdTrack.SetTriggerX3Pattern(locTrg->GetX3Pattern());
 272         esdTrack.SetTriggerY3Pattern(locTrg->GetY3Pattern());
 273         esdTrack.SetTriggerX4Pattern(locTrg->GetX4Pattern());
 274         esdTrack.SetTriggerY4Pattern(locTrg->GetY4Pattern());
 275       }
 276       esd->AddMuonTrack(&esdTrack);
 277     }
 278
 279   } else {
 280
 281     while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
 282       AliMUONESDInterface::MUONToESD(*track, esdTrack, vertex);
 283       // set the trigger x/y strips pattern
 284       if (esdTrack.GetMatchTrigger()) {
 285         AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(fTriggerStore->FindLocal(esdTrack.LoCircuit()));
 286         esdTrack.SetTriggerX1Pattern(locTrg->GetX1Pattern());
 287         esdTrack.SetTriggerY1Pattern(locTrg->GetY1Pattern());
 288         esdTrack.SetTriggerX2Pattern(locTrg->GetX2Pattern());
 289         esdTrack.SetTriggerY2Pattern(locTrg->GetY2Pattern());
 290         esdTrack.SetTriggerX3Pattern(locTrg->GetX3Pattern());
 291         esdTrack.SetTriggerY3Pattern(locTrg->GetY3Pattern());
 292         esdTrack.SetTriggerX4Pattern(locTrg->GetX4Pattern());
 293         esdTrack.SetTriggerY4Pattern(locTrg->GetY4Pattern());
 294       }
 295       esd->AddMuonTrack(&esdTrack);
 296     }
 297
 298   }
 299
 300   // fill the local trigger decisions not matched with tracks
 301   // associate them to "ghost" tracks
 302
 303   Int_t loTrgNum(-1);
 304   Bool_t matched = kFALSE;
 305
 306   AliMUONTriggerTrack *triggerTrack;
 307   AliMUONTrack muonTrack;
 308   AliESDMuonTrack esdGhostTrack;
 309   TIter itTriggerTrack(fTriggerTrackStore->CreateIterator());
 310   while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() )
 311 ) )
 312     {
 313       loTrgNum = triggerTrack->GetLoTrgNum();
 314       AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(fTriggerStore->FindLocal(loTrgNum));
 315
 316       /* verify if this local trigger has been already matched */
 317       TIter itTrack(trackStore.CreateIterator());
 318       while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
 319         {
 320           if (matched = (track->LoCircuit() == locTrg->LoCircuit())) break;
 321         }
 322       if (matched) continue;
 323
 324       muonTrack.SetLocalTrigger(locTrg->LoCircuit(),
 325                                 locTrg->LoStripX(),
 326                                 locTrg->LoStripY(),
 327                                 locTrg->LoDev(),
 328                                 locTrg->LoLpt(),
 329                                 locTrg->LoHpt());
 330
 331       /* make the AliESDMuonTrack from the "track" object */
 332
 333       esdGhostTrack.SetLocalTrigger(muonTrack.GetLocalTrigger());
 334       // set the transverse momentum of this track to "zero"
 335       esdGhostTrack.SetInverseBendingMomentum(1.E+10);
 336       esdGhostTrack.SetInverseBendingMomentumAtDCA(1.E+10);
 337       esdGhostTrack.SetInverseBendingMomentumUncorrected(1.E+10);
 338       // set the trigger x/y strips pattern
 339       esdGhostTrack.SetTriggerX1Pattern(locTrg->GetX1Pattern());
 340       esdGhostTrack.SetTriggerY1Pattern(locTrg->GetY1Pattern());
 341       esdGhostTrack.SetTriggerX2Pattern(locTrg->GetX2Pattern());
 342       esdGhostTrack.SetTriggerY2Pattern(locTrg->GetY2Pattern());
 343       esdGhostTrack.SetTriggerX3Pattern(locTrg->GetX3Pattern());
 344       esdGhostTrack.SetTriggerY3Pattern(locTrg->GetY3Pattern());
 345       esdGhostTrack.SetTriggerX4Pattern(locTrg->GetX4Pattern());
 346       esdGhostTrack.SetTriggerY4Pattern(locTrg->GetY4Pattern());
 347       esd->AddMuonTrack(&esdGhostTrack);
 348
 349     }
 350
 351 }
 352
 353 //_____________________________________________________________________________
 354 AliMUONVTrackReconstructor* AliMUONTracker::CreateTrackReconstructor(const char* trackingMode, AliMUONVClusterServer* clusterServer)
 355 {
 356   /// Create track reconstructor, depending on tracking mode set in RecoParam
 357
 358   AliMUONVTrackReconstructor* trackReco(0x0);
 359
 360   TString opt(trackingMode);
 361   opt.ToUpper();
 362
 363   if (strstr(opt,"ORIGINAL"))
 364   {
 365     trackReco = new AliMUONTrackReconstructor(*clusterServer);
 366   }
 367   else if (strstr(opt,"KALMAN"))
 368   {
 369     trackReco = new AliMUONTrackReconstructorK(*clusterServer);
 370   }
 371   else
 372   {
 373     AliErrorClass(Form("tracking mode \"%s\" does not exist",opt.Data()));
 374     return 0x0;
 375   }
 376
 377   AliInfoClass(Form("Will use %s for tracking",trackReco->ClassName()));
 378
 379   return trackReco;
 380 }
 381
 382 //_____________________________________________________________________________
 383 void AliMUONTracker::UnloadClusters()
 384 {
 385   /// Clear internal clusterStore
 386
 387   delete fInputClusterStore;
 388   fInputClusterStore = 0x0;
 389 }
 390
 391
 392 //_____________________________________________________________________________
 393 void
 394 AliMUONTracker::SetupClusterServer(AliMUONVClusterServer& clusterServer)
 395 {
 396   /// Setup the cluster server
 397
 398   if ( AliMUONReconstructor::GetRecoParam()->BypassSt45() )
 399   {
 400     Bool_t ok = clusterServer.UseTriggerTrackStore(TriggerTrackStore());
 401
 402     if ( ok )
 403
 404     {
 405       AliWarning("WILL USE TRIGGER TRACKS TO GENERATE CLUSTERS IN STATIONS 4 AND 5, THUS BYPASSING REAL CLUSTERS IN THOSE TWO STATIONS !!!");
 406     }
 407     else
 408     {
 409       AliWarning("BYPASSING OF ST45 REQUESTED, BUT CLUSTERSERVER DOES NOT SEEM TO SUPPORT IT !!!");
 410     }
 411   }
 412 }
 413
 414