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()
45 ,fkReconstructor(NULL)
51 // Default constructor
53 //printf("AliTRDtrackV1::AliTRDtrackV1()\n");
55 for(int i =0; i<3; i++) fBudget[i] = 0.;
57 Float_t pid = 1./AliPID::kSPECIES;
58 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
60 for(int ip=0; ip<kNplane; ip++){
61 fTrackletIndex[ip] = 0xffff;
66 //_______________________________________________________________
67 AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
70 ,fkReconstructor(ref.fkReconstructor)
79 //printf("AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &)\n");
80 SetBit(kOwner, kFALSE);
81 for(int ip=0; ip<kNplane; ip++){
82 fTrackletIndex[ip] = ref.fTrackletIndex[ip];
83 fTracklet[ip] = ref.fTracklet[ip];
85 if(ref.fTrackLow) fTrackLow = new AliExternalTrackParam(*ref.fTrackLow);
86 if(ref.fTrackHigh) fTrackHigh = new AliExternalTrackParam(*ref.fTrackHigh);
88 for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
90 for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
92 AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
95 //_______________________________________________________________
96 AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
99 ,fkReconstructor(NULL)
105 // Constructor from AliESDtrack
108 SetLabel(t.GetLabel());
111 SetMass(t.GetMass()/*0.000510*/);
112 AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
113 Int_t ti[kNplane]; t.GetTRDtracklets(&ti[0]);
114 for(int ip=0; ip<kNplane; ip++){
115 fTrackletIndex[ip] = ti[ip] < 0 ? 0xffff : ti[ip];
116 fTracklet[ip] = NULL;
118 for(int i =0; i<3; i++) fBudget[i] = 0.;
120 Float_t pid = 1./AliPID::kSPECIES;
121 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
123 const AliExternalTrackParam *par = &t;
124 if (t.GetStatus() & AliESDtrack::kTRDbackup) {
125 par = t.GetOuterParam();
127 AliError("No backup info!");
134 ,par->GetCovariance());
136 if(t.GetStatus() & AliESDtrack::kTIME) {
139 t.GetIntegratedTimes(times);
140 SetIntegratedTimes(times);
141 SetIntegratedLength(t.GetIntegratedLength());
145 //_______________________________________________________________
146 AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 * const trklts, const Double_t p[5], const Double_t cov[15]
147 , Double_t x, Double_t alpha) : AliKalmanTrack()
150 ,fkReconstructor(NULL)
156 // The stand alone tracking constructor
157 // TEMPORARY !!!!!!!!!!!
159 // 1. covariance matrix
160 // 2. dQdl calculation
163 Double_t cnv = GetBz() < 1.e-5 ? 1.e5 : 1.0 / (GetBz() * kB2C);
164 // Double_t cnv = 1.0 / (GetBz() * kB2C);
166 Double_t pp[5] = { p[0]
172 Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
173 Double_t c32 = x*cov[13] - cov[ 8];
174 Double_t c20 = x*cov[10] - cov[ 3];
175 Double_t c21 = x*cov[11] - cov[ 4];
176 Double_t c42 = x*cov[14] - cov[12];
178 Double_t cc[15] = { cov[ 0]
181 , cov[ 6], cov[ 7], c32, cov[ 9]
182 , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
184 Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
185 Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
186 Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
187 AliDebug(4, Form("Pt mixing : w0[%4.2f] 1/pt0[%5.3f] w1[%4.2f] 1/pt[%5.3f]", w0, 1./p0, w1, 1./pp[4]));
188 pp[4] = w0*p0 + w1*pp[4];
191 cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
194 AliDebug(2, Form("Init @ x[%6.2f] pt[%5.3f]", x, 1./pp[4]));
196 for(int iplane=0; iplane<kNplane; iplane++){
197 fTrackletIndex[iplane] = 0xffff;
198 if(!trklts[iplane].IsOK()) fTracklet[iplane] = NULL;
200 fTracklet[iplane] = &trklts[iplane];
201 ncls += fTracklet[iplane]->GetN();
204 AliKalmanTrack::SetNumberOfClusters(ncls);
205 for(int i =0; i<3; i++) fBudget[i] = 0.;
207 Float_t pid = 1./AliPID::kSPECIES;
208 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
212 //_______________________________________________________________
213 AliTRDtrackV1::~AliTRDtrackV1()
216 //printf("I-AliTRDtrackV1::~AliTRDtrackV1() : Owner[%s]\n", TestBit(kOwner)?"YES":"NO");
218 if(fBackupTrack) delete fBackupTrack; fBackupTrack = NULL;
220 if(fTrackLow) delete fTrackLow; fTrackLow = NULL;
221 if(fTrackHigh) delete fTrackHigh; fTrackHigh = NULL;
223 for(Int_t ip=0; ip<kNplane; ip++){
224 if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
225 fTracklet[ip] = NULL;
226 fTrackletIndex[ip] = 0xffff;
230 //_______________________________________________________________
231 Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
233 // set MC label for this track
234 if(!GetNumberOfClusters()) return kFALSE;
236 Int_t s[kMAXCLUSTERSPERTRACK][2];
237 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
244 AliTRDcluster *c = NULL;
245 for (Int_t ip = 0; ip < kNplane; ip++) {
246 if(fTrackletIndex[ip] == 0xffff) continue;
247 for (Int_t ic = 0; ic < AliTRDseedV1::kNclusters; ic++) {
248 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
249 for (Int_t k = 0; k < 3; k++) {
250 label = c->GetLabel(k);
254 while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) {
255 if ((s[j][0] == label) ||
270 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
271 if (s[i][1] <= max) continue;
275 if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
282 //_______________________________________________________________
283 Bool_t AliTRDtrackV1::CookPID()
286 // Cook the PID information for the track by delegating the omonim function of the tracklets.
287 // Computes the number of tracklets used. The tracklet information are considered independent.
288 // For the moment no global track measurement of PID is performed as for example to estimate
289 // bremsstrahlung probability based on global chi2 of the track.
291 // The status bit AliESDtrack::kTRDpid is set during the call of AliTRDtrackV1::UpdateESDtrack().The PID performance of the
292 //TRD for tracks with 6 tacklets is displayed below.
294 //<img src="TRD/trackPID.gif">
298 /*Reset the a priori probabilities*/
299 Double_t pid = 1. / AliPID::kSPECIES;
300 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fPID[ispec] = pid;
302 UChar_t fPIDquality = SetNumberOfTrackletsPID(kTRUE);
303 // no tracklet found for PID calculations
304 if(!fPIDquality) return kFALSE;
306 // slot for PID calculation @ track level for bremsstrahlung TODO
308 // normalize probabilities
309 Double_t probTotal = 0.0;
310 for (Int_t is = 0; is < AliPID::kSPECIES; is++) probTotal += fPID[is];
313 if (probTotal <= 0.0) {
314 AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference data.");
318 for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal;
323 //___________________________________________________________
324 UChar_t AliTRDtrackV1::GetNumberOfTrackletsPID() const
326 // Retrieve number of tracklets used for PID calculation.
329 Float_t *prob = NULL;
330 for(int ip=0; ip<kNplane; ip++){
331 if(fTrackletIndex[ip] == 0xffff) continue;
332 if(!fTracklet[ip]->IsOK()) continue;
333 if(!(prob = fTracklet[ip]->GetProbability(kFALSE))) continue;
335 Int_t nspec = 0; // quality check of tracklet dEdx
336 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
337 if(prob[ispec] < 0.) continue;
342 fTracklet[ip]->SetPID();
348 //___________________________________________________________
349 UChar_t AliTRDtrackV1::SetNumberOfTrackletsPID(Bool_t recalc)
351 // Retrieve number of tracklets used for PID calculation. // Recalculated PID at tracklet level by quering the PID DB.
353 UChar_t fPIDquality = 0;
355 // steer PID calculation @ tracklet level
356 Float_t *prob = NULL;
357 for(int ip=0; ip<kNplane; ip++){
358 if(fTrackletIndex[ip] == 0xffff) continue;
359 if(!fTracklet[ip]->IsOK()) continue;
360 if(!(prob = fTracklet[ip]->GetProbability(recalc))) return 0;
362 Int_t nspec = 0; // quality check of tracklet dEdx
363 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
364 if(prob[ispec] < 0.) continue;
365 fPID[ispec] *= prob[ispec];
375 //_______________________________________________________________
376 AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
378 // Get the cluster at a certain position in the track
380 for(Int_t ip=0; ip<kNplane; ip++){
381 if(!fTracklet[ip]) continue;
382 if(n+fTracklet[ip]->GetN() <= id){
383 n+=fTracklet[ip]->GetN();
386 AliTRDcluster *c = NULL;
387 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
388 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
390 if(n<id){n++; continue;}
397 //_______________________________________________________________
398 Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
400 // Get the cluster index at a certain position in the track
402 for(Int_t ip=0; ip<kNplane; ip++){
403 if(!fTracklet[ip]) continue;
404 if(n+fTracklet[ip]->GetN() <= id){
405 n+=fTracklet[ip]->GetN();
408 AliTRDcluster *c = NULL;
409 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
410 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
412 if(n<id){n++; continue;}
413 return fTracklet[ip]->GetIndexes(ic);
419 //_______________________________________________________________
420 Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
422 // Compute chi2 between tracklet and track. The value is calculated at the radial position of the track
423 // equal to the reference radial position of the tracklet (see AliTRDseedV1)
425 // The chi2 estimator is computed according to the following formula
427 // #chi^{2}=(X_{trklt}-X_{track})(C_{trklt}+C_{track})^{-1}(X_{trklt}-X_{track})^{T}
429 // where X=(y z), the position of the track/tracklet in the yz plane
432 Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
433 trklt->GetCovAt(trklt->GetX(), cov);
434 return AliExternalTrackParam::GetPredictedChi2(p, cov);
437 //_______________________________________________________________
438 Int_t AliTRDtrackV1::GetSector() const
440 return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
443 //_______________________________________________________________
444 Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
446 // Checks whether two tracks are equal
447 if (!o) return kFALSE;
448 const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
449 if (!inTrack) return kFALSE;
451 //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
453 for(Int_t i = 0; i < AliPID::kSPECIES; i++){
454 if ( fPID[i] != inTrack->GetPID(i) ) return kFALSE;
457 for (Int_t i = 0; i < 3; i++){
458 if ( fBudget[i] != inTrack->GetBudget(i) ) return kFALSE;
460 if ( fDE != inTrack->GetEdep() ) return kFALSE;
461 if ( fFakeRatio != inTrack->GetFakeRatio() ) return kFALSE;
462 if ( fChi2 != inTrack->GetChi2() ) return kFALSE;
463 if ( fMass != inTrack->GetMass() ) return kFALSE;
464 if ( fLab != inTrack->GetLabel() ) return kFALSE;
465 if ( fN != inTrack->GetNumberOfClusters() ) return kFALSE;
466 if ( AliKalmanTrack::GetIntegratedLength() != inTrack->GetIntegratedLength() ) return kFALSE;
468 if ( GetX() != inTrack->GetX() ) return kFALSE;
469 if ( GetAlpha() != inTrack->GetAlpha() ) return kFALSE;
470 const Double_t *inP = inTrack->GetParameter();
471 const Double_t *curP = GetParameter();
472 for (Int_t i = 0; i < 5; i++){
473 if ( curP[i] != inP[i]) return kFALSE;
475 const Double_t *inC = inTrack->GetCovariance();
476 const Double_t *curC = GetCovariance();
477 for (Int_t i = 0; i < 15; i++){
478 if ( curC[i] != inC[i]) return kFALSE;
481 for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
482 AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
483 AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
484 if (curTracklet && inTracklet){
485 if (! curTracklet->IsEqual(inTracklet) ) {
486 curTracklet->Print();
491 // if one tracklet exists, and corresponding
492 // in other track doesn't - return kFALSE
493 if(inTracklet || curTracklet) return kFALSE;
500 //_______________________________________________________________
501 Bool_t AliTRDtrackV1::IsElectron() const
503 if(GetPID(0) > fkReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
508 //_____________________________________________________________________________
509 void AliTRDtrackV1::MakeBackupTrack()
512 // Creates a backup track
516 fBackupTrack->~AliTRDtrackV1();
517 new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
520 fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
523 //_____________________________________________________________________________
524 Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z)
527 // Find a prolongation at given x
528 // Return -1 if it does not exist
531 Double_t bz = GetBz();
532 if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return -1;
533 if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return -1;
539 //_____________________________________________________________________________
540 Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
543 // Propagates this track to a reference plane defined by "xk" [cm]
544 // correcting for the mean crossed material.
546 // "xx0" - thickness/rad.length [units of the radiation length]
547 // "xrho" - thickness*density [g/cm^2]
550 if (xk == GetX()) return kTRUE;
552 Double_t xyz0[3] = {GetX(), GetY(), GetZ()}, // track position BEFORE propagation
553 b[3]; // magnetic field
555 if(!AliExternalTrackParam::PropagateToBxByBz(xk,b)) return kFALSE;
557 // local track position AFTER propagation
558 Double_t xyz1[3] = {GetX(), GetY(), GetZ()};
561 if (IsStartedTimeIntegral()) {
562 Double_t l2 = TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
563 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1])
564 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
565 Double_t crv = AliExternalTrackParam::GetC(b[3]);
566 if (TMath::Abs(l2*crv) > 0.0001) {
567 // Make correction for curvature if neccesary
568 l2 = 0.5 * TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
569 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1]));
570 l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
571 l2 = TMath::Sqrt(l2*l2 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
577 if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, GetMass())) return kFALSE;
583 Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
584 Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
585 if ((beta2 < 1.0e-10) ||
586 ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
590 Double_t dE = 0.153e-3 / beta2
591 * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
596 // Suspicious part - think about it ?
597 Double_t kinE = TMath::Sqrt(p2);
598 if (dE > 0.8*kinE) dE = 0.8 * kinE; //
599 if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch
606 Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation
607 Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2);
609 fCee += fX*fX * sigmac2;
617 //_____________________________________________________________________________
618 Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
621 // Propagate track to the radial position
622 // Rotation always connected to the last track position
630 Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
632 Double_t dir = (radius > r) ? -1.0 : 1.0;
634 for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
637 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
640 if(GetProlongation(x,y,z)<0) return -1;
641 xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
642 xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
645 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
647 param[1] = 100000000;
649 PropagateTo(x,param[1],param[0]*param[4]);
654 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
657 if(GetProlongation(r,y,z)<0) return -1;
658 xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
659 xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
662 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
665 param[1] = 100000000;
667 PropagateTo(r,param[1],param[0]*param[4]);
673 //_____________________________________________________________________________
674 void AliTRDtrackV1::Print(Option_t *o) const
676 // Print track status
677 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]));
678 AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
680 AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
681 AliInfo(Form("Ntr[%1d] NtrPID[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), GetNumberOfTrackletsPID(), fN, fLab));
684 const Double_t *curP = GetParameter();
685 for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
689 const Double_t *curC = GetCovariance();
690 for (Int_t i = 0, j=4, k=0; i<15; i++, k++){
691 printf("%7.2f ", curC[i]);
697 if(strcmp(o, "a")!=0) return;
699 for(Int_t ip=0; ip<kNplane; ip++){
700 if(!fTracklet[ip]) continue;
701 fTracklet[ip]->Print(o);
706 //_____________________________________________________________________________
707 Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
710 // Rotates track parameters in R*phi plane
711 // if absolute rotation alpha is in global system
712 // otherwise alpha rotation is relative to the current rotation angle
715 if (absolute) alpha -= GetAlpha();
718 return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
721 //___________________________________________________________
722 void AliTRDtrackV1::SetNumberOfClusters()
724 // Calculate the number of clusters attached to this track
727 for(int ip=0; ip<kNplane; ip++){
728 if(fTracklet[ip] && fTrackletIndex[ip] != 0xffff) ncls += fTracklet[ip]->GetN();
730 AliKalmanTrack::SetNumberOfClusters(ncls);
734 //_______________________________________________________________
735 void AliTRDtrackV1::SetOwner()
738 // Toggle ownership of tracklets
741 if(TestBit(kOwner)) return;
742 for (Int_t ip = 0; ip < kNplane; ip++) {
743 if(fTrackletIndex[ip] == 0xffff) continue;
744 fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
745 fTracklet[ip]->SetOwner();
750 //_______________________________________________________________
751 void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *const trklt, Int_t index)
756 Int_t plane = trklt->GetPlane();
758 fTracklet[plane] = trklt;
759 fTrackletIndex[plane] = index;
762 //_______________________________________________________________
763 void AliTRDtrackV1::SetTrackLow()
765 const AliExternalTrackParam *op = dynamic_cast<const AliExternalTrackParam*>(this);
766 fTrackLow = fTrackLow ? new(fTrackLow) AliExternalTrackParam(*op) : new AliExternalTrackParam(*op);
769 //_______________________________________________________________
770 void AliTRDtrackV1::SetTrackHigh(const AliExternalTrackParam *op)
772 if(!op) op = dynamic_cast<const AliExternalTrackParam*>(this);
773 fTrackHigh = fTrackHigh ? new(fTrackHigh) AliExternalTrackParam(*op) : new AliExternalTrackParam(*op);
776 //_______________________________________________________________
777 void AliTRDtrackV1::UnsetTracklet(Int_t plane)
779 if(plane<0 && plane >= kNplane) return;
780 fTrackletIndex[plane] = 0xffff;
781 fTracklet[plane] = NULL;
785 //_______________________________________________________________
786 Bool_t AliTRDtrackV1::Update(Double_t *p, Double_t *cov, Double_t chi2)
791 AliDebug(2, Form("Point:\n p=[%6.2f %6.2f]\n V=[%6.2f %6.2f]\n [%6.2f %6.2f]", p[0], p[1], cov[0], cov[1], cov[1], cov[2]));
792 if(!AliExternalTrackParam::Update(p, cov)) return kFALSE;
794 // Register info to track
795 SetNumberOfClusters();
796 SetChi2(GetChi2() + chi2);
800 //_______________________________________________________________
801 void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
804 // Update the TRD PID information in the ESD track
807 Int_t nslices = fkReconstructor->GetRecoParam()->IsEightSlices() ? (Int_t)AliTRDpidUtil::kNNslices : (Int_t)AliTRDpidUtil::kLQslices;
808 // number of tracklets used for PID calculation
809 UChar_t nPID = GetNumberOfTrackletsPID();
810 // number of tracklets attached to the track
811 UChar_t nTrk = GetNumberOfTracklets();
812 // pack the two numbers together and store them in the ESD
813 track->SetTRDntracklets(nPID | (nTrk<<3));
814 // allocate space to store raw PID signals dEdx & momentum
815 track->SetNumberOfTRDslices((nslices+2)*AliTRDgeometry::kNlayer);
817 Float_t p, sp; Double_t spd;
818 for (Int_t ip = 0; ip < kNplane; ip++) {
819 if(fTrackletIndex[ip] == 0xffff) continue;
820 if(!fTracklet[ip]->HasPID()) continue;
821 const Float_t *dedx = fTracklet[ip]->GetdEdx();
822 for (Int_t js = 0; js < nslices; js++, dedx++) track->SetTRDslice(*dedx, ip, js);
823 p = fTracklet[ip]->GetMomentum(&sp); spd = sp;
824 track->SetTRDmomentum(p, ip, &spd);
826 // store PID probabilities
827 track->SetTRDpid(fPID);