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 **************************************************************************/
18 /// \class AliMUONRecoCheck
19 /// Utility class to check reconstruction
20 /// Reconstructed tracks are compared to reference tracks.
21 /// The reference tracks are built from AliTrackReference for the
22 /// hit in chamber (0..9) and from kinematics for the vertex parameters.
25 #include "AliMUONRecoCheck.h"
26 #include "AliMUONTrack.h"
27 #include "AliMUONRecData.h"
28 #include "AliMUONConstants.h"
30 #include "AliLoader.h"
31 #include "AliRunLoader.h"
32 #include "AliHeader.h"
34 #include "AliTrackReference.h"
37 #include <TParticle.h>
38 #include <TParticlePDG.h>
41 ClassImp(AliMUONRecoCheck)
44 //_____________________________________________________________________________
45 AliMUONRecoCheck::AliMUONRecoCheck(Char_t *chLoader, Char_t *chLoaderSim)
53 fReconstructibleTracks(0),
55 fIsLoadConstructor(kTRUE)
57 /// Constructor using "galice.root",
58 /// takes care of loading/unloading Kinematics, TrackRefs and Tracks
60 fMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
63 fRunLoader = AliRunLoader::Open(chLoader,"MUONFolder","READ");
65 AliError(Form("no run loader found " ));
70 AliLoader *loader = fRunLoader->GetLoader("MUONLoader");
73 fMUONData = new AliMUONRecData(loader,"MUON","MUON");
75 AliError(Form("no MUONData found " ));
80 fRunLoaderSim = AliRunLoader::Open(chLoaderSim,"MUONFolderSim","READ");
82 AliError(Form("no run sim loader found " ));
87 AliLoader *loaderSim = fRunLoaderSim->GetLoader("MUONLoader");
90 fMUONDataSim = new AliMUONSimData(loaderSim,"MUON","MUON");
92 AliError(Form("no MUONDataSim found " ));
96 fRunLoaderSim->LoadKinematics("READ");
97 fRunLoader->LoadTrackRefs("READ");
98 loader->LoadTracks("READ");
102 //_____________________________________________________________________________
103 AliMUONRecoCheck::AliMUONRecoCheck(AliRunLoader *runloader, AliMUONRecData *muondata,
104 AliRunLoader *runloaderSim, AliMUONSimData *muondataSim)
112 fReconstructibleTracks(0),
114 fIsLoadConstructor(kFALSE)
116 /// Constructor from AliRunLoader and AliMUONData,
117 /// does not load/unload Kinematics, TrackRefs and Tracks internally
118 /// it should be done in the execution program (e.g. see MUONRecoCheck.C)
120 fMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
123 fRunLoader = runloader;
125 AliError(Form("no run loader found " ));
130 fMUONData = muondata;
132 AliError(Form("no MUONData found " ));
137 fRunLoaderSim = runloaderSim;
138 if (!fRunLoaderSim) {
139 AliError(Form("no run sim loader found " ));
144 fMUONDataSim = muondataSim;
146 AliError(Form("no MUONDataSim found " ));
153 //_____________________________________________________________________________
154 AliMUONRecoCheck::~AliMUONRecoCheck()
157 delete fMuonTrackRef;
158 if(fIsLoadConstructor){
159 fRunLoaderSim->UnloadKinematics();
160 fRunLoader->UnloadTrackRefs();
161 fRunLoader->UnloadTracks();
165 delete fRunLoaderSim;
169 //_____________________________________________________________________________
170 void AliMUONRecoCheck::MakeTrackRef()
172 /// Make reconstructible tracks
174 AliTrackReference *trackReference;
175 AliMUONTrack *muonTrack;
176 AliMUONTrackParam *trackParam;
177 AliMUONHitForRec *hitForRec;
178 Float_t x, y, z, pX, pY, pZ, pYZ;
179 Int_t track, trackSave;
181 Float_t bendingSlope = 0;
182 Float_t nonBendingSlope = 0;
183 Float_t inverseBendingMomentum = 0;
185 TTree* treeTR = fRunLoader->TreeTR();
186 if (treeTR == NULL) return;
188 TBranch* branch = treeTR->GetBranch("MUON");
189 if (branch == NULL) return;
191 TClonesArray* trackRefs = 0;
192 branch->SetAddress(&trackRefs);
193 branch->SetAutoDelete(kTRUE);
195 Int_t nTrackRef = (Int_t)branch->GetEntries();
197 track = trackSave = -999;
199 Int_t iHitMin, iChamber, detElemId;
201 trackParam = new AliMUONTrackParam();
202 hitForRec = new AliMUONHitForRec();
207 Int_t max = fRunLoaderSim->GetHeader()->Stack()->GetNtrack();
208 for (Int_t iTrackRef = 0; iTrackRef < nTrackRef; iTrackRef++) {
210 branch->GetEntry(iTrackRef);
215 if (!trackRefs->GetEntries()) continue;
219 muonTrack = new AliMUONTrack();
221 for (Int_t iHit = iHitMin; iHit < trackRefs->GetEntries(); iHit++) {
223 trackReference = (AliTrackReference*)trackRefs->At(iHit);
224 x = trackReference->X();
225 y = trackReference->Y();
226 z = trackReference->Z();
227 pX = trackReference->Px();
228 pY = trackReference->Py();
229 pZ = trackReference->Pz();
231 track = trackReference->GetTrack();
235 << "Track ID " << track
236 << " larger than max number of particles " << max << endl;
240 if (track != trackSave && iHit != 0) {
246 // track parameters at hit
247 trackParam->SetBendingCoor(y);
248 trackParam->SetNonBendingCoor(x);
251 if (TMath::Abs(pZ) > 0) {
252 bendingSlope = pY/pZ;
253 nonBendingSlope = pX/pZ;
255 pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
256 if (pYZ >0) inverseBendingMomentum = 1/pYZ;
258 trackParam->SetBendingSlope(bendingSlope);
259 trackParam->SetNonBendingSlope(nonBendingSlope);
260 trackParam->SetInverseBendingMomentum(inverseBendingMomentum);
262 hitForRec->SetBendingCoor(y);
263 hitForRec->SetNonBendingCoor(x);
265 hitForRec->SetBendingReso2(0.0);
266 hitForRec->SetNonBendingReso2(0.0);
267 detElemId = hitForRec->GetDetElemId();
268 if (detElemId) iChamber = detElemId / 100 - 1;
269 else iChamber = AliMUONConstants::ChamberNumber(z);
270 hitForRec->SetChamberNumber(iChamber);
272 muonTrack->AddTrackParamAtHit(trackParam,0);
273 muonTrack->AddHitForRecAtHit(hitForRec);
274 muonTrack->SetTrackID(track);
277 if (iHit == trackRefs->GetEntries()-1) isNewTrack = kFALSE;
280 // track parameters at vertex
281 particle = fRunLoaderSim->GetHeader()->Stack()->Particle(muonTrack->GetTrackID());
292 trackParam->SetBendingCoor(y);
293 trackParam->SetNonBendingCoor(x);
295 if (TMath::Abs(pZ) > 0) {
296 bendingSlope = pY/pZ;
297 nonBendingSlope = pX/pZ;
300 pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
301 if (pYZ >0) inverseBendingMomentum = 1/pYZ;
303 ppdg = particle->GetPDG(1);
304 charge = (Int_t)(ppdg->Charge()/3.0);
305 inverseBendingMomentum *= charge;
307 trackParam->SetBendingSlope(bendingSlope);
308 trackParam->SetNonBendingSlope(nonBendingSlope);
309 trackParam->SetInverseBendingMomentum(inverseBendingMomentum);
311 muonTrack->SetTrackParamAtVertex(trackParam);
314 AddMuonTrackReference(muonTrack);
318 } // end while isNewTrack
323 ReconstructibleTracks();
330 //____________________________________________________________________________
331 TClonesArray* AliMUONRecoCheck::GetTrackReco()
333 /// Return TClonesArray of reconstructed tracks
335 fMUONData->ResetRecTracks();
336 fMUONData->SetTreeAddress("RT");
337 fTrackReco = fMUONData->RecTracks();
338 fMUONData->GetRecTracks();
339 fRecoTracks = fTrackReco->GetEntriesFast();
342 //_____________________________________________________________________________
343 void AliMUONRecoCheck::PrintEvent() const
348 AliMUONHitForRec *hitForRec;
349 TClonesArray * hitForRecAtHit = 0;
350 Float_t xRec,yRec,zRec;
352 Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
354 printf(" ******************************* \n");
355 printf(" nb of tracks %d \n",nTrackRef);
357 for (Int_t index = 0; index < nTrackRef; index++) {
358 track = (AliMUONTrack*)fMuonTrackRef->At(index);
359 hitForRecAtHit = track->GetHitForRecAtHit();
360 Int_t nTrackHits = hitForRecAtHit->GetEntriesFast();
361 printf(" track number %d \n",index);
362 for (Int_t iHit = 0; iHit < nTrackHits; iHit++){
363 hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit);
364 xRec = hitForRec->GetNonBendingCoor();
365 yRec = hitForRec->GetBendingCoor();
366 zRec = hitForRec->GetZ();
367 printf(" x,y,z: %f , %f , %f \n",xRec,yRec,zRec);
372 //_____________________________________________________________________________
373 void AliMUONRecoCheck::ResetTracks() const
377 if (fMuonTrackRef) fMuonTrackRef->Delete();
379 //_____________________________________________________________________________
380 void AliMUONRecoCheck::CleanMuonTrackRef()
382 /// Re-calculate hits parameters because two AliTrackReferences are recorded for
383 /// each chamber (one when particle is entering + one when particle is leaving
384 /// the sensitive volume)
386 Float_t maxGasGap = 1.; // cm
387 AliMUONTrack *track, *trackNew;
388 AliMUONHitForRec *hitForRec, *hitForRec1, *hitForRec2;
389 AliMUONTrackParam *trackParam, *trackParam1, *trackParam2, *trackParamAtVertex;
390 TClonesArray * hitForRecAtHit = 0;
391 TClonesArray * trackParamAtHit = 0;
392 Float_t xRec,yRec,zRec;
393 Float_t xRec1,yRec1,zRec1;
394 Float_t xRec2,yRec2,zRec2;
395 Float_t bendingSlope,nonBendingSlope,bendingMomentum;
396 Float_t bendingSlope1,nonBendingSlope1,bendingMomentum1;
397 Float_t bendingSlope2,nonBendingSlope2,bendingMomentum2;
398 TClonesArray *newMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
400 Int_t iChamber = 0, detElemId = 0;
402 Int_t nTrackHits = 0;
404 hitForRec = new AliMUONHitForRec();
405 trackParam = new AliMUONTrackParam();
407 Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
408 for (Int_t index = 0; index < nTrackRef; index++) {
409 track = (AliMUONTrack*)fMuonTrackRef->At(index);
410 hitForRecAtHit = track->GetHitForRecAtHit();
411 trackParamAtHit = track->GetTrackParamAtHit();
412 trackParamAtVertex = track->GetTrackParamAtVertex();
413 nTrackHits = hitForRecAtHit->GetEntriesFast();
414 trackNew = new AliMUONTrack();
416 while (iHit1 < nTrackHits) {
417 hitForRec1 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit1);
418 trackParam1 = (AliMUONTrackParam*) trackParamAtHit->At(iHit1);
419 xRec1 = hitForRec1->GetNonBendingCoor();
420 yRec1 = hitForRec1->GetBendingCoor();
421 zRec1 = hitForRec1->GetZ();
425 bendingSlope1 = trackParam1->GetBendingSlope();
426 nonBendingSlope1 = trackParam1->GetNonBendingSlope();
427 bendingMomentum1 = 0;
428 if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0)
429 bendingMomentum1 = 1./trackParam1->GetInverseBendingMomentum();
430 bendingSlope = bendingSlope1;
431 nonBendingSlope = nonBendingSlope1;
432 bendingMomentum = bendingMomentum1;
434 for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
435 hitForRec2 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit2);
436 trackParam2 = (AliMUONTrackParam*) trackParamAtHit->At(iHit2);
437 xRec2 = hitForRec2->GetNonBendingCoor();
438 yRec2 = hitForRec2->GetBendingCoor();
439 zRec2 = hitForRec2->GetZ();
440 bendingSlope2 = trackParam2->GetBendingSlope();
441 nonBendingSlope2 = trackParam2->GetNonBendingSlope();
442 bendingMomentum2 = 0;
443 if (TMath::Abs(trackParam2->GetInverseBendingMomentum()) > 0)
444 bendingMomentum2 = 1./trackParam2->GetInverseBendingMomentum();
446 if ( TMath::Abs(zRec2-zRec1) < maxGasGap ) {
452 bendingSlope += bendingSlope2;
453 nonBendingSlope += nonBendingSlope2;
454 bendingMomentum += bendingMomentum2;
459 xRec /= (Float_t)nRec;
460 yRec /= (Float_t)nRec;
461 zRec /= (Float_t)nRec;
462 bendingSlope /= (Float_t)nRec;
463 nonBendingSlope /= (Float_t)nRec;
464 bendingMomentum /= (Float_t)nRec;
466 hitForRec->SetNonBendingCoor(xRec);
467 hitForRec->SetBendingCoor(yRec);
468 hitForRec->SetZ(zRec);
469 detElemId = hitForRec->GetDetElemId();
470 if (detElemId) iChamber = detElemId / 100 - 1;
471 else iChamber = AliMUONConstants::ChamberNumber(zRec);
472 hitForRec->SetChamberNumber(iChamber);
473 hitForRec->SetBendingReso2(0.0);
474 hitForRec->SetNonBendingReso2(0.0);
475 trackParam->SetNonBendingCoor(xRec);
476 trackParam->SetBendingCoor(yRec);
477 trackParam->SetZ(zRec);
478 trackParam->SetNonBendingSlope(nonBendingSlope);
479 trackParam->SetBendingSlope(bendingSlope);
480 if (TMath::Abs(bendingMomentum) > 0)
481 trackParam->SetInverseBendingMomentum(1./bendingMomentum);
483 trackNew->AddHitForRecAtHit(hitForRec);
484 trackNew->AddTrackParamAtHit(trackParam,0);
489 trackNew->SetTrackID(track->GetTrackID());
490 trackNew->SetTrackParamAtVertex(trackParamAtVertex);
491 {new ((*newMuonTrackRef)[newMuonTrackRef->GetEntriesFast()]) AliMUONTrack(*trackNew);}
497 fMuonTrackRef->Delete();
498 nTrackRef = newMuonTrackRef->GetEntriesFast();
499 for (Int_t index = 0; index < nTrackRef; index++) {
500 track = (AliMUONTrack*)newMuonTrackRef->At(index);
501 AddMuonTrackReference(track);
506 newMuonTrackRef->Delete();
507 delete newMuonTrackRef;
511 //_____________________________________________________________________________
512 void AliMUONRecoCheck::ReconstructibleTracks()
514 /// Calculate the number of reconstructible tracks
517 TClonesArray* hitForRecAtHit = NULL;
518 AliMUONHitForRec* hitForRec;
520 Int_t nTrackRef, nTrackHits;
521 Int_t isChamberInTrack[10];
523 Bool_t isTrackOK = kTRUE;
525 fReconstructibleTracks = 0;
527 nTrackRef = fMuonTrackRef->GetEntriesFast();
528 for (Int_t index = 0; index < nTrackRef; index++) {
529 track = (AliMUONTrack*)fMuonTrackRef->At(index);
530 hitForRecAtHit = track->GetHitForRecAtHit();
531 nTrackHits = hitForRecAtHit->GetEntriesFast();
532 for (Int_t ch = 0; ch < 10; ch++) isChamberInTrack[ch] = 0;
534 for ( Int_t iHit = 0; iHit < nTrackHits; iHit++) {
535 hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit);
536 zRec = hitForRec->GetZ();
537 iChamber = hitForRec->GetChamberNumber();
538 if (iChamber < 0 || iChamber > 10) continue;
539 isChamberInTrack[iChamber] = 1;
541 // track is reconstructible if the particle is depositing a hit
542 // in the following chamber combinations:
545 if (!isChamberInTrack[0] && !isChamberInTrack[1]) isTrackOK = kFALSE;
546 if (!isChamberInTrack[2] && !isChamberInTrack[3]) isTrackOK = kFALSE;
547 if (!isChamberInTrack[4] && !isChamberInTrack[5]) isTrackOK = kFALSE;
548 Int_t nHitsInLastStations=0;
549 for (Int_t ch = 6; ch < AliMUONConstants::NTrackingCh(); ch++)
550 if (isChamberInTrack[ch]) nHitsInLastStations++;
551 if(nHitsInLastStations < 3) isTrackOK = kFALSE;
553 if (isTrackOK) fReconstructibleTracks++;
554 if (!isTrackOK) fMuonTrackRef->Remove(track); // remove non reconstructible tracks
556 fMuonTrackRef->Compress();