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 #include "AliESDtrack.h"
20 #include "AliTracker.h"
22 #include "AliTRDtrackV1.h"
23 #include "AliTRDcluster.h"
24 #include "AliTRDcalibDB.h"
25 #include "AliTRDReconstructor.h"
26 #include "AliTRDrecoParam.h"
28 ClassImp(AliTRDtrackV1)
30 ///////////////////////////////////////////////////////////////////////////////
32 // Represents a reconstructed TRD track //
33 // Local TRD Kalman track //
36 // Alex Bercuci <A.Bercuci@gsi.de> //
37 // Markus Fasel <M.Fasel@gsi.de> //
39 ///////////////////////////////////////////////////////////////////////////////
41 //_______________________________________________________________
42 AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
46 ,fkReconstructor(NULL)
52 // Default constructor
54 //printf("AliTRDtrackV1::AliTRDtrackV1()\n");
56 for(int i =0; i<3; i++) fBudget[i] = 0.;
58 Float_t pid = 1./AliPID::kSPECIES;
59 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
61 for(int ip=0; ip<kNplane; ip++){
62 fTrackletIndex[ip] = -1;
67 //_______________________________________________________________
68 AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
72 ,fkReconstructor(ref.fkReconstructor)
81 //printf("AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &)\n");
82 SetBit(kOwner, kFALSE);
83 for(int ip=0; ip<kNplane; ip++){
84 fTrackletIndex[ip] = ref.fTrackletIndex[ip];
85 fTracklet[ip] = ref.fTracklet[ip];
87 if(ref.fTrackLow) fTrackLow = new AliExternalTrackParam(*ref.fTrackLow);
88 if(ref.fTrackHigh) fTrackHigh = new AliExternalTrackParam(*ref.fTrackHigh);
90 for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
92 for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
94 AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
97 //_______________________________________________________________
98 AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
102 ,fkReconstructor(NULL)
108 // Constructor from AliESDtrack
112 SetLabel(t.GetLabel());
115 SetMass(t.GetMass()/*0.000510*/);
116 AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
117 Int_t ti[]={-1, -1, -1, -1, -1, -1}; t.GetTRDtracklets(&ti[0]);
118 for(int ip=0; ip<kNplane; ip++){
119 fTrackletIndex[ip] = ti[ip];
120 fTracklet[ip] = NULL;
122 for(int i =0; i<3; i++) fBudget[i] = 0.;
124 Float_t pid = 1./AliPID::kSPECIES;
125 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
127 const AliExternalTrackParam *par = &t;
128 if (t.GetStatus() & AliESDtrack::kTRDbackup) {
129 par = t.GetOuterParam();
131 AliError("No backup info!");
138 ,par->GetCovariance());
140 if(t.GetStatus() & AliESDtrack::kTIME) {
143 t.GetIntegratedTimes(times);
144 SetIntegratedTimes(times);
145 SetIntegratedLength(t.GetIntegratedLength());
149 //_______________________________________________________________
150 AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 * const trklts, const Double_t p[5], const Double_t cov[15]
151 , Double_t x, Double_t alpha) : AliKalmanTrack()
155 ,fkReconstructor(NULL)
161 // The stand alone tracking constructor
162 // TEMPORARY !!!!!!!!!!!
164 // 1. covariance matrix
165 // 2. dQdl calculation
169 Double_t cnv = (TMath::Abs(b) < 1.e-5) ? 1.e5 : 1./GetBz()/kB2C;
171 Double_t pp[5] = { p[0]
177 Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
178 Double_t c32 = x*cov[13] - cov[ 8];
179 Double_t c20 = x*cov[10] - cov[ 3];
180 Double_t c21 = x*cov[11] - cov[ 4];
181 Double_t c42 = x*cov[14] - cov[12];
183 Double_t cc[15] = { cov[ 0]
186 , cov[ 6], cov[ 7], c32, cov[ 9]
187 , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
189 Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
190 Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
191 Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
192 AliDebug(3, Form("Pt mixing : w0[%4.2f] pt0[%5.3f] w1[%4.2f] pt[%5.3f]", w0, 1./p0, w1, 1./pp[4]));
194 pp[4] = w0*p0 + w1*pp[4];
195 cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
197 AliDebug(2, Form("Init @ x[%6.2f] pt[%5.3f]", x, 1./pp[4]));
199 for(int iplane=0; iplane<kNplane; iplane++){
200 fTrackletIndex[iplane] = -1;
201 if(!trklts[iplane].IsOK()) fTracklet[iplane] = NULL;
203 fTracklet[iplane] = &trklts[iplane];
204 ncls += fTracklet[iplane]->GetN();
207 AliKalmanTrack::SetNumberOfClusters(ncls);
208 for(int i =0; i<3; i++) fBudget[i] = 0.;
210 Float_t pid = 1./AliPID::kSPECIES;
211 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
214 //_______________________________________________________________
215 AliTRDtrackV1::~AliTRDtrackV1()
217 // Clean up all objects allocated by the track during its lifetime.
218 AliDebug(2, Form("Deleting track[%d]\n fBackupTrack[%p] fTrackLow[%p] fTrackHigh[%p] Owner[%c].", fESDid, (void*)fBackupTrack, (void*)fTrackLow, (void*)fTrackHigh, TestBit(kOwner)?'y':'n'));
220 if(fBackupTrack) delete fBackupTrack; fBackupTrack = NULL;
222 if(fTrackLow) delete fTrackLow; fTrackLow = NULL;
223 if(fTrackHigh) delete fTrackHigh; fTrackHigh = NULL;
225 for(Int_t ip=0; ip<kNplane; ip++){
226 if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
227 fTracklet[ip] = NULL;
228 fTrackletIndex[ip] = -1;
232 //_______________________________________________________________
233 AliTRDtrackV1 &AliTRDtrackV1::operator=(const AliTRDtrackV1 &t)
236 // Assignment operator
240 ((AliTRDtrackV1 &) t).Copy(*this);
247 //_____________________________________________________________________________
248 void AliTRDtrackV1::Copy(TObject &t) const
254 ((AliTRDtrackV1 &) t).fStatus = fStatus;
255 ((AliTRDtrackV1 &) t).fESDid = fESDid;
256 ((AliTRDtrackV1 &) t).fDE = fDE;
257 ((AliTRDtrackV1 &) t).fkReconstructor = fkReconstructor;
258 ((AliTRDtrackV1 &) t).fBackupTrack = 0x0;
259 ((AliTRDtrackV1 &) t).fTrackLow = 0x0;
260 ((AliTRDtrackV1 &) t).fTrackHigh = 0x0;
262 for(Int_t ip = 0; ip < kNplane; ip++) {
263 ((AliTRDtrackV1 &) t).fTrackletIndex[ip] = fTrackletIndex[ip];
264 ((AliTRDtrackV1 &) t).fTracklet[ip] = fTracklet[ip];
267 ((AliTRDtrackV1 &) t).fTrackLow = new AliExternalTrackParam(*fTrackLow);
270 ((AliTRDtrackV1 &) t).fTrackHigh = new AliExternalTrackParam(*fTrackHigh);
273 for (Int_t i = 0; i < 3; i++) {
274 ((AliTRDtrackV1 &) t).fBudget[i] = fBudget[i];
276 for (Int_t is = 0; is < AliPID::kSPECIES; is++) {
277 ((AliTRDtrackV1 &) t).fPID[is] = fPID[is];
282 //_______________________________________________________________
283 Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
285 // set MC label for this track
286 if(!GetNumberOfClusters()) return kFALSE;
288 Int_t s[kMAXCLUSTERSPERTRACK][2];
289 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
296 AliTRDcluster *c = NULL;
297 for (Int_t ip = 0; ip < kNplane; ip++) {
298 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
299 for (Int_t ic = 0; ic < AliTRDseedV1::kNclusters; ic++) {
300 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
301 for (Int_t k = 0; k < 3; k++) {
302 label = c->GetLabel(k);
306 while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) {
307 if ((s[j][0] == label) ||
322 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
323 if (s[i][1] <= max) continue;
327 if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
334 //_______________________________________________________________
335 Bool_t AliTRDtrackV1::CookPID()
338 // Cook the PID information for the track by delegating the omonim function of the tracklets.
339 // Computes the number of tracklets used. The tracklet information are considered independent.
340 // For the moment no global track measurement of PID is performed as for example to estimate
341 // bremsstrahlung probability based on global chi2 of the track.
343 // The status bit AliESDtrack::kTRDpid is set during the call of AliTRDtrackV1::UpdateESDtrack().The PID performance of the
344 //TRD for tracks with 6 tacklets is displayed below.
346 //<img src="TRD/trackPID.gif">
350 /*Reset the a priori probabilities*/
351 Double_t pid = 1. / AliPID::kSPECIES;
352 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fPID[ispec] = pid;
354 UChar_t fPIDquality = SetNumberOfTrackletsPID(kTRUE);
355 // no tracklet found for PID calculations
356 if(!fPIDquality) return kFALSE;
358 // slot for PID calculation @ track level for bremsstrahlung TODO
360 // normalize probabilities
361 Double_t probTotal = 0.0;
362 for (Int_t is = 0; is < AliPID::kSPECIES; is++) probTotal += fPID[is];
365 if (probTotal <= 0.0) {
366 AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference data.");
370 for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal;
375 //___________________________________________________________
376 UChar_t AliTRDtrackV1::GetNumberOfTrackletsPID() const
378 // Retrieve number of tracklets used for PID calculation.
381 Float_t *prob = NULL;
382 for(int ip=0; ip<kNplane; ip++){
383 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
384 if(!fTracklet[ip]->IsOK()) continue;
385 if(!(prob = fTracklet[ip]->GetProbability(kFALSE))) continue;
387 Int_t nspec = 0; // quality check of tracklet dEdx
388 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
389 if(prob[ispec] < 0.) continue;
394 fTracklet[ip]->SetPID();
400 //___________________________________________________________
401 UChar_t AliTRDtrackV1::SetNumberOfTrackletsPID(Bool_t recalc)
403 // Retrieve number of tracklets used for PID calculation. // Recalculated PID at tracklet level by quering the PID DB.
405 UChar_t fPIDquality(0);
407 // steer PID calculation @ tracklet level
409 for(int ip=0; ip<kNplane; ip++){
410 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
411 if(!fTracklet[ip]->IsOK()) continue;
412 if(!(prob = fTracklet[ip]->GetProbability(recalc))) return 0;
414 Int_t nspec = 0; // quality check of tracklet dEdx
415 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
416 if(prob[ispec] < 0.) continue;
417 fPID[ispec] *= prob[ispec];
427 //_______________________________________________________________
428 AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
430 // Get the cluster at a certain position in the track
432 for(Int_t ip=0; ip<kNplane; ip++){
433 if(!fTracklet[ip]) continue;
434 if(n+fTracklet[ip]->GetN() <= id){
435 n+=fTracklet[ip]->GetN();
438 AliTRDcluster *c = NULL;
439 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
440 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
442 if(n<id){n++; continue;}
449 //_______________________________________________________________
450 Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
452 // Get the cluster index at a certain position in the track
454 for(Int_t ip=0; ip<kNplane; ip++){
455 if(!fTracklet[ip]) continue;
456 if(n+fTracklet[ip]->GetN() <= id){
457 n+=fTracklet[ip]->GetN();
460 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
461 if(!(fTracklet[ip]->GetClusters(ic))) continue;
462 if(n<id){n++; continue;}
463 return fTracklet[ip]->GetIndexes(ic);
469 //_______________________________________________________________
470 Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
472 // Compute chi2 between tracklet and track. The value is calculated at the radial position of the track
473 // equal to the reference radial position of the tracklet (see AliTRDseedV1)
475 // The chi2 estimator is computed according to the following formula
477 // #chi^{2}=(X_{trklt}-X_{track})(C_{trklt}+C_{track})^{-1}(X_{trklt}-X_{track})^{T}
479 // where X=(y z), the position of the track/tracklet in the yz plane
482 Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
483 trklt->GetCovAt(trklt->GetX(), cov);
484 return AliExternalTrackParam::GetPredictedChi2(p, cov);
487 //_______________________________________________________________
488 Int_t AliTRDtrackV1::GetSector() const
490 return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
493 //_______________________________________________________________
494 Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
496 // Checks whether two tracks are equal
497 if (!o) return kFALSE;
498 const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
499 if (!inTrack) return kFALSE;
501 //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
503 if(memcmp(fPID, inTrack->fPID, AliPID::kSPECIES*sizeof(Double32_t))) return kFALSE;
504 if(memcmp(fBudget, inTrack->fBudget, 3*sizeof(Double32_t))) return kFALSE;
505 if(memcmp(&fDE, &inTrack->fDE, sizeof(Double32_t))) return kFALSE;
506 if(memcmp(&fFakeRatio, &inTrack->fFakeRatio, sizeof(Double32_t))) return kFALSE;
507 if(memcmp(&fChi2, &inTrack->fChi2, sizeof(Double32_t))) return kFALSE;
508 if(memcmp(&fMass, &inTrack->fMass, sizeof(Double32_t))) return kFALSE;
509 if( fLab != inTrack->fLab ) return kFALSE;
510 if( fN != inTrack->fN ) return kFALSE;
511 Double32_t l(0.), in(0.);
512 l = GetIntegratedLength(); in = inTrack->GetIntegratedLength();
513 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
514 l=GetX(); in=inTrack->GetX();
515 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
516 l = GetAlpha(); in = inTrack->GetAlpha();
517 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
518 if(memcmp(GetParameter(), inTrack->GetParameter(), 5*sizeof(Double32_t))) return kFALSE;
519 if(memcmp(GetCovariance(), inTrack->GetCovariance(), 15*sizeof(Double32_t))) return kFALSE;
521 for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
522 AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
523 AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
524 if (curTracklet && inTracklet){
525 if (! curTracklet->IsEqual(inTracklet) ) {
526 curTracklet->Print();
531 // if one tracklet exists, and corresponding
532 // in other track doesn't - return kFALSE
533 if(inTracklet || curTracklet) return kFALSE;
540 //_______________________________________________________________
541 Bool_t AliTRDtrackV1::IsElectron() const
543 if(GetPID(0) > fkReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
548 //_____________________________________________________________________________
549 Int_t AliTRDtrackV1::MakeBackupTrack()
552 // Creates a backup track
553 // TO DO update quality check of the track.
556 Float_t occupancy(0.); Int_t n(0), ncls(0);
557 for(Int_t il(AliTRDgeometry::kNlayer); il--;){
558 if(!fTracklet[il]) continue;
560 occupancy+=fTracklet[il]->GetOccupancyTB();
561 ncls += fTracklet[il]->GetN();
566 //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
568 Int_t failedCutId(0);
569 if(GetChi2()/n > 5.0) failedCutId=1;
570 if(occupancy < 0.7) failedCutId=2;
571 //if(ratio1 > 0.6) &&
572 //if(ratio0+ratio1 > 1.5) &&
573 if(GetNCross() != 0) failedCutId=3;
574 if(TMath::Abs(GetSnp()) > 0.85) failedCutId=4;
575 if(ncls < 20) failedCutId=5;
578 AliDebug(2, Form("\n"
579 "chi2/tracklet < 5.0 [%c] %5.2f\n"
580 "occupancy > 0.7 [%c] %4.2f\n"
581 "NCross == 0 [%c] %d\n"
582 "Abs(snp) < 0.85 [%c] %4.2f\n"
583 "NClusters > 20 [%c] %d"
584 ,(GetChi2()/n<5.0)?'y':'n', GetChi2()/n
585 ,(occupancy>0.7)?'y':'n', occupancy
586 ,(GetNCross()==0)?'y':'n', GetNCross()
587 ,(TMath::Abs(GetSnp())<0.85)?'y':'n', TMath::Abs(GetSnp())
588 ,(ncls>20)?'y':'n', ncls
594 fBackupTrack->~AliTRDtrackV1();
595 new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
598 fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
602 //_____________________________________________________________________________
603 Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z) const
606 // Find a prolongation at given x
607 // Return -1 if it does not exist
610 Double_t bz = GetBz();
611 if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return -1;
612 if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return -1;
618 //_____________________________________________________________________________
619 Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
622 // Propagates this track to a reference plane defined by "xk" [cm]
623 // correcting for the mean crossed material.
625 // "xx0" - thickness/rad.length [units of the radiation length]
626 // "xrho" - thickness*density [g/cm^2]
629 if (TMath::Abs(xk - GetX())<AliTRDReconstructor::GetEpsilon()*0.1) return kTRUE; // 10% of the tracker precision
631 Double_t xyz0[3] = {GetX(), GetY(), GetZ()}, // track position BEFORE propagation
632 b[3]; // magnetic field
634 if(!AliExternalTrackParam::PropagateToBxByBz(xk,b)) return kFALSE;
636 // local track position AFTER propagation
637 Double_t xyz1[3] = {GetX(), GetY(), GetZ()};
640 if (IsStartedTimeIntegral()) {
641 Double_t l2 = TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
642 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1])
643 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
644 Double_t crv = AliExternalTrackParam::GetC(b[2]);
645 if (TMath::Abs(l2*crv) > 0.0001) {
646 // Make correction for curvature if neccesary
647 l2 = 0.5 * TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
648 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1]));
649 l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
650 l2 = TMath::Sqrt(l2*l2 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
656 if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, GetMass())) return kFALSE;
662 Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
663 Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
664 if ((beta2 < 1.0e-10) ||
665 ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
669 Double_t dE = 0.153e-3 / beta2
670 * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
675 // Suspicious part - think about it ?
676 Double_t kinE = TMath::Sqrt(p2);
677 if (dE > 0.8*kinE) dE = 0.8 * kinE; //
678 if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch
685 Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation
686 Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2);
688 fCee += fX*fX * sigmac2;
696 //_____________________________________________________________________________
697 Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
700 // Propagate track to the radial position
701 // Rotation always connected to the last track position
709 Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
711 Double_t dir = (radius > r) ? -1.0 : 1.0;
713 for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
716 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
719 if(GetProlongation(x,y,z)<0) return -1;
720 xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
721 xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
724 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
726 param[1] = 100000000;
728 PropagateTo(x,param[1],param[0]*param[4]);
733 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
736 if(GetProlongation(r,y,z)<0) return -1;
737 xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
738 xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
741 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
744 param[1] = 100000000;
746 PropagateTo(r,param[1],param[0]*param[4]);
752 //_____________________________________________________________________________
753 void AliTRDtrackV1::Print(Option_t *o) const
755 // Print track status
756 AliInfo(Form("PID [%4.1f %4.1f %4.1f %4.1f %4.1f]", 1.E2*fPID[0], 1.E2*fPID[1], 1.E2*fPID[2], 1.E2*fPID[3], 1.E2*fPID[4]));
757 AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
759 AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
760 AliInfo(Form("Ntr[%1d] NtrPID[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), GetNumberOfTrackletsPID(), fN, fLab));
763 const Double_t *curP = GetParameter();
764 for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
768 const Double_t *curC = GetCovariance();
769 for (Int_t i = 0, j=4, k=0; i<15; i++, k++){
770 printf("%7.2f ", curC[i]);
776 if(strcmp(o, "a")!=0) return;
778 for(Int_t ip=0; ip<kNplane; ip++){
779 if(!fTracklet[ip]) continue;
780 fTracklet[ip]->Print(o);
785 //_____________________________________________________________________________
786 Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
789 // Rotates track parameters in R*phi plane
790 // if absolute rotation alpha is in global system
791 // otherwise alpha rotation is relative to the current rotation angle
794 if (absolute) alpha -= GetAlpha();
797 return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
800 //___________________________________________________________
801 void AliTRDtrackV1::SetNumberOfClusters()
803 // Calculate the number of clusters attached to this track
806 for(int ip=0; ip<kNplane; ip++){
807 if(fTracklet[ip] && fTrackletIndex[ip] >= 0) ncls += fTracklet[ip]->GetN();
809 AliKalmanTrack::SetNumberOfClusters(ncls);
813 //_______________________________________________________________
814 void AliTRDtrackV1::SetOwner()
817 // Toggle ownership of tracklets
820 if(TestBit(kOwner)) return;
821 for (Int_t ip = 0; ip < kNplane; ip++) {
822 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
823 fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
824 fTracklet[ip]->SetOwner();
829 //_______________________________________________________________
830 void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *const trklt, Int_t index)
835 Int_t plane = trklt->GetPlane();
837 fTracklet[plane] = trklt;
838 fTrackletIndex[plane] = index;
841 //_______________________________________________________________
842 void AliTRDtrackV1::SetTrackIn()
844 // Save location of birth for the TRD track
845 // If the pointer is not valid allocate memory
847 const AliExternalTrackParam *op = dynamic_cast<const AliExternalTrackParam*>(this);
849 //printf("SetTrackIn() : fTrackLow[%p]\n", (void*)fTrackLow);
851 fTrackLow->~AliExternalTrackParam();
852 new(fTrackLow) AliExternalTrackParam(*op);
853 } else fTrackLow = new AliExternalTrackParam(*op);
856 //_______________________________________________________________
857 void AliTRDtrackV1::SetTrackOut(const AliExternalTrackParam *op)
859 // Save location of death for the TRD track
860 // If the pointer is not valid allocate memory
862 if(!op) op = dynamic_cast<const AliExternalTrackParam*>(this);
864 fTrackHigh->~AliExternalTrackParam();
865 new(fTrackHigh) AliExternalTrackParam(*op);
866 } else fTrackHigh = new AliExternalTrackParam(*op);
869 //_______________________________________________________________
870 void AliTRDtrackV1::UnsetTracklet(Int_t plane)
873 fTrackletIndex[plane] = -1;
874 fTracklet[plane] = NULL;
878 //_______________________________________________________________
879 void AliTRDtrackV1::UpdateChi2(Float_t chi2)
881 // Update chi2/track with one tracklet contribution
882 SetChi2(GetChi2() + chi2);
885 //_______________________________________________________________
886 void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
889 // Update the TRD PID information in the ESD track
892 Int_t nslices = fkReconstructor->GetRecoParam()->IsEightSlices() ? (Int_t)AliTRDpidUtil::kNNslices : (Int_t)AliTRDpidUtil::kLQslices;
893 // number of tracklets used for PID calculation
894 UChar_t nPID = GetNumberOfTrackletsPID();
895 // number of tracklets attached to the track
896 UChar_t nTrk = GetNumberOfTracklets();
897 // pack the two numbers together and store them in the ESD
898 track->SetTRDntracklets(nPID | (nTrk<<3));
899 // allocate space to store raw PID signals dEdx & momentum
900 track->SetNumberOfTRDslices((nslices+2)*AliTRDgeometry::kNlayer);
902 Float_t p, sp; Double_t spd;
903 for (Int_t ip = 0; ip < kNplane; ip++) {
904 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
905 if(!fTracklet[ip]->HasPID()) continue;
906 const Float_t *dedx = fTracklet[ip]->GetdEdx();
907 for (Int_t js = 0; js < nslices; js++, dedx++) track->SetTRDslice(*dedx, ip, js);
908 p = fTracklet[ip]->GetMomentum(&sp); spd = sp;
909 track->SetTRDmomentum(p, ip, &spd);
911 // store PID probabilities
912 track->SetTRDpid(fPID);