2 /**************************************************************************
3 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
8 * Permission to use, copy, modify and distribute this software and its *
9 * documentation strictly for non-commercial purposes is hereby granted *
10 * without fee, provided that the above copyright notice appears in all *
11 * copies and that both the copyright notice and this permission notice *
12 * appear in the supporting documentation. The authors make no claims *
13 * about the suitability of this software for any purpose. It is *
14 * provided "as is" without express or implied warranty. *
15 **************************************************************************/
20 #include "AliESDtrack.h"
21 #include "AliTracker.h"
23 #include "AliTRDtrackV1.h"
24 #include "AliTRDcluster.h"
25 #include "AliTRDcalibDB.h"
26 #include "AliTRDReconstructor.h"
27 #include "AliTRDPIDResponse.h"
28 #include "AliTRDrecoParam.h"
30 ClassImp(AliTRDtrackV1)
32 ///////////////////////////////////////////////////////////////////////////////
34 // Represents a reconstructed TRD track //
35 // Local TRD Kalman track //
38 // Alex Bercuci <A.Bercuci@gsi.de> //
39 // Markus Fasel <M.Fasel@gsi.de> //
41 ///////////////////////////////////////////////////////////////////////////////
43 //_______________________________________________________________
44 AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
48 ,fkReconstructor(NULL)
54 // Default constructor
56 //printf("AliTRDtrackV1::AliTRDtrackV1()\n");
58 for(int i =0; i<3; i++) fBudget[i] = 0.;
60 Float_t pid = 1./AliPID::kSPECIES;
61 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
63 for(int ip=0; ip<kNplane; ip++){
64 fTrackletIndex[ip] = -1;
69 //_______________________________________________________________
70 AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
74 ,fkReconstructor(ref.fkReconstructor)
83 //printf("AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &)\n");
84 SetBit(kOwner, kFALSE);
85 for(int ip=0; ip<kNplane; ip++){
86 fTrackletIndex[ip] = ref.fTrackletIndex[ip];
87 fTracklet[ip] = ref.fTracklet[ip];
89 if(ref.fTrackLow) fTrackLow = new AliExternalTrackParam(*ref.fTrackLow);
90 if(ref.fTrackHigh) fTrackHigh = new AliExternalTrackParam(*ref.fTrackHigh);
92 for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
94 for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
96 AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
99 //_______________________________________________________________
100 AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
104 ,fkReconstructor(NULL)
110 // Constructor from AliESDtrack
114 SetLabel(t.GetLabel());
117 SetMass(t.GetMass()/*0.000510*/);
118 AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
119 Int_t ti[]={-1, -1, -1, -1, -1, -1}; t.GetTRDtracklets(&ti[0]);
120 for(int ip=0; ip<kNplane; ip++){
121 fTrackletIndex[ip] = ti[ip];
122 fTracklet[ip] = NULL;
124 for(int i =0; i<3; i++) fBudget[i] = 0.;
126 Float_t pid = 1./AliPID::kSPECIES;
127 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
129 const AliExternalTrackParam *par = &t;
130 if (t.GetStatus() & AliESDtrack::kTRDbackup) {
131 par = t.GetOuterParam();
133 AliError("No backup info!");
140 ,par->GetCovariance());
142 if(t.GetStatus() & AliESDtrack::kTIME) {
145 t.GetIntegratedTimes(times);
146 SetIntegratedTimes(times);
147 SetIntegratedLength(t.GetIntegratedLength());
151 //_______________________________________________________________
152 AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 * const trklts, const Double_t p[5], const Double_t cov[15]
153 , Double_t x, Double_t alpha) : AliKalmanTrack()
157 ,fkReconstructor(NULL)
163 // The stand alone tracking constructor
164 // TEMPORARY !!!!!!!!!!!
166 // 1. covariance matrix
167 // 2. dQdl calculation
171 Double_t cnv = (TMath::Abs(b) < 1.e-5) ? 1.e5 : 1./GetBz()/kB2C;
173 Double_t pp[5] = { p[0]
179 Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
180 Double_t c32 = x*cov[13] - cov[ 8];
181 Double_t c20 = x*cov[10] - cov[ 3];
182 Double_t c21 = x*cov[11] - cov[ 4];
183 Double_t c42 = x*cov[14] - cov[12];
185 Double_t cc[15] = { cov[ 0]
188 , cov[ 6], cov[ 7], c32, cov[ 9]
189 , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
191 Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
192 Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
193 Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
194 AliDebug(3, Form("Pt mixing : w0[%4.2f] pt0[%5.3f] w1[%4.2f] pt[%5.3f]", w0, 1./p0, w1, 1./pp[4]));
196 pp[4] = w0*p0 + w1*pp[4];
197 cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
199 AliDebug(2, Form("Init @ x[%6.2f] pt[%5.3f]", x, 1./pp[4]));
201 for(int iplane=0; iplane<kNplane; iplane++){
202 fTrackletIndex[iplane] = -1;
203 if(!trklts[iplane].IsOK()) fTracklet[iplane] = NULL;
205 fTracklet[iplane] = &trklts[iplane];
206 ncls += fTracklet[iplane]->GetN();
209 AliKalmanTrack::SetNumberOfClusters(ncls);
210 for(int i =0; i<3; i++) fBudget[i] = 0.;
212 Float_t pid = 1./AliPID::kSPECIES;
213 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
216 //_______________________________________________________________
217 AliTRDtrackV1::~AliTRDtrackV1()
219 // Clean up all objects allocated by the track during its lifetime.
220 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'));
222 if(fBackupTrack) delete fBackupTrack; fBackupTrack = NULL;
224 if(fTrackLow) delete fTrackLow; fTrackLow = NULL;
225 if(fTrackHigh) delete fTrackHigh; fTrackHigh = NULL;
227 for(Int_t ip=0; ip<kNplane; ip++){
228 if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
229 fTracklet[ip] = NULL;
230 fTrackletIndex[ip] = -1;
234 //_______________________________________________________________
235 AliTRDtrackV1 &AliTRDtrackV1::operator=(const AliTRDtrackV1 &t)
238 // Assignment operator
242 AliKalmanTrack::operator=(t);
243 ((AliTRDtrackV1 &) t).Copy(*this);
250 //_____________________________________________________________________________
251 void AliTRDtrackV1::Copy(TObject &t) const
257 ((AliTRDtrackV1 &) t).fStatus = fStatus;
258 ((AliTRDtrackV1 &) t).fESDid = fESDid;
259 ((AliTRDtrackV1 &) t).fDE = fDE;
260 ((AliTRDtrackV1 &) t).fkReconstructor = fkReconstructor;
261 ((AliTRDtrackV1 &) t).fBackupTrack = 0x0;
262 ((AliTRDtrackV1 &) t).fTrackLow = 0x0;
263 ((AliTRDtrackV1 &) t).fTrackHigh = 0x0;
265 for(Int_t ip = 0; ip < kNplane; ip++) {
266 ((AliTRDtrackV1 &) t).fTrackletIndex[ip] = fTrackletIndex[ip];
267 ((AliTRDtrackV1 &) t).fTracklet[ip] = fTracklet[ip];
270 ((AliTRDtrackV1 &) t).fTrackLow = new AliExternalTrackParam(*fTrackLow);
273 ((AliTRDtrackV1 &) t).fTrackHigh = new AliExternalTrackParam(*fTrackHigh);
276 for (Int_t i = 0; i < 3; i++) {
277 ((AliTRDtrackV1 &) t).fBudget[i] = fBudget[i];
279 for (Int_t is = 0; is < AliPID::kSPECIES; is++) {
280 ((AliTRDtrackV1 &) t).fPID[is] = fPID[is];
285 //_______________________________________________________________
286 Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
288 // set MC label for this track
289 if(!GetNumberOfClusters()) return kFALSE;
291 Int_t s[kMAXCLUSTERSPERTRACK][2];
292 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
299 AliTRDcluster *c = NULL;
300 for (Int_t ip = 0; ip < kNplane; ip++) {
301 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
302 for (Int_t ic = 0; ic < AliTRDseedV1::kNclusters; ic++) {
303 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
304 for (Int_t k = 0; k < 3; k++) {
305 label = c->GetLabel(k);
309 while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) {
310 if ((s[j][0] == label) ||
325 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
326 if (s[i][1] <= max) continue;
330 if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
337 //_______________________________________________________________
338 Bool_t AliTRDtrackV1::CookPID()
341 // Cook the PID information for the track by delegating the omonim function of the tracklets.
342 // Computes the number of tracklets used. The tracklet information are considered independent.
343 // For the moment no global track measurement of PID is performed as for example to estimate
344 // bremsstrahlung probability based on global chi2 of the track.
346 // The status bit AliESDtrack::kTRDpid is set during the call of AliTRDtrackV1::UpdateESDtrack().The PID performance of the
347 //TRD for tracks with 6 tacklets is displayed below.
349 //<img src="TRD/trackPID.gif">
352 const AliTRDPIDResponse *pidResponse = AliTRDcalibDB::Instance()->GetPIDResponse(fkReconstructor->GetRecoParam()->GetPIDmethod());
354 AliError("PID Response not available");
357 Int_t nslices = pidResponse->GetNumberOfSlices();
358 Double_t dEdx[kNplane * (Int_t)AliTRDPIDResponse::kNslicesNN];
359 Float_t trackletP[kNplane];
360 memset(dEdx, 0, sizeof(Double_t) * kNplane * (Int_t)AliTRDPIDResponse::kNslicesNN);
361 memset(trackletP, 0, sizeof(Float_t)*kNplane);
362 for(Int_t iseed = 0; iseed < kNplane; iseed++){
363 if(!fTracklet[iseed]) continue;
364 trackletP[iseed] = fTracklet[iseed]->GetMomentum();
365 fTracklet[iseed]->SetPID();
366 if(pidResponse->GetPIDmethod() == AliTRDPIDResponse::kLQ1D){
367 dEdx[iseed] = fTracklet[iseed]->GetdQdl();
369 fTracklet[iseed]->CookdEdx(nslices);
370 const Float_t *trackletdEdx = fTracklet[iseed]->GetdEdx();
371 for(Int_t islice = 0; islice < nslices; islice++){
372 dEdx[iseed*nslices + islice] = trackletdEdx[islice];
376 pidResponse->GetResponse(nslices, dEdx, trackletP, fPID);
380 //___________________________________________________________
381 UChar_t AliTRDtrackV1::GetNumberOfTrackletsPID() const
383 // Retrieve number of tracklets used for PID calculation.
386 for(int ip=0; ip<kNplane; ip++){
387 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
388 if(!fTracklet[ip]->IsOK()) continue;
395 //_______________________________________________________________
396 AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
398 // Get the cluster at a certain position in the track
400 for(Int_t ip=0; ip<kNplane; ip++){
401 if(!fTracklet[ip]) continue;
402 if(n+fTracklet[ip]->GetN() <= id){
403 n+=fTracklet[ip]->GetN();
406 AliTRDcluster *c = NULL;
407 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
408 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
410 if(n<id){n++; continue;}
417 //_______________________________________________________________
418 Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
420 // Get the cluster index at a certain position in the track
422 for(Int_t ip=0; ip<kNplane; ip++){
423 if(!fTracklet[ip]) continue;
424 if(n+fTracklet[ip]->GetN() <= id){
425 n+=fTracklet[ip]->GetN();
428 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
429 if(!(fTracklet[ip]->GetClusters(ic))) continue;
430 if(n<id){n++; continue;}
431 return fTracklet[ip]->GetIndexes(ic);
437 //_______________________________________________________________
438 Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
440 // Compute chi2 between tracklet and track. The value is calculated at the radial position of the track
441 // equal to the reference radial position of the tracklet (see AliTRDseedV1)
443 // The chi2 estimator is computed according to the following formula
445 // #chi^{2}=(X_{trklt}-X_{track})(C_{trklt}+C_{track})^{-1}(X_{trklt}-X_{track})^{T}
447 // where X=(y z), the position of the track/tracklet in the yz plane
450 Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
451 trklt->GetCovAt(trklt->GetX(), cov);
452 return AliExternalTrackParam::GetPredictedChi2(p, cov);
455 //_______________________________________________________________
456 Int_t AliTRDtrackV1::GetSector() const
458 return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
461 //_______________________________________________________________
462 Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
464 // Checks whether two tracks are equal
465 if (!o) return kFALSE;
466 const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
467 if (!inTrack) return kFALSE;
469 //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
471 if(memcmp(fPID, inTrack->fPID, AliPID::kSPECIES*sizeof(Double32_t))) return kFALSE;
472 if(memcmp(fBudget, inTrack->fBudget, 3*sizeof(Double32_t))) return kFALSE;
473 if(memcmp(&fDE, &inTrack->fDE, sizeof(Double32_t))) return kFALSE;
474 if(memcmp(&fFakeRatio, &inTrack->fFakeRatio, sizeof(Double32_t))) return kFALSE;
475 if(memcmp(&fChi2, &inTrack->fChi2, sizeof(Double32_t))) return kFALSE;
476 if(memcmp(&fMass, &inTrack->fMass, sizeof(Double32_t))) return kFALSE;
477 if( fLab != inTrack->fLab ) return kFALSE;
478 if( fN != inTrack->fN ) return kFALSE;
479 Double32_t l(0.), in(0.);
480 l = GetIntegratedLength(); in = inTrack->GetIntegratedLength();
481 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
482 l=GetX(); in=inTrack->GetX();
483 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
484 l = GetAlpha(); in = inTrack->GetAlpha();
485 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
486 if(memcmp(GetParameter(), inTrack->GetParameter(), 5*sizeof(Double32_t))) return kFALSE;
487 if(memcmp(GetCovariance(), inTrack->GetCovariance(), 15*sizeof(Double32_t))) return kFALSE;
489 for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
490 AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
491 AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
492 if (curTracklet && inTracklet){
493 if (! curTracklet->IsEqual(inTracklet) ) {
494 curTracklet->Print();
499 // if one tracklet exists, and corresponding
500 // in other track doesn't - return kFALSE
501 if(inTracklet || curTracklet) return kFALSE;
508 //_______________________________________________________________
509 Bool_t AliTRDtrackV1::IsElectron() const
511 if(GetPID(0) > fkReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
516 //_____________________________________________________________________________
517 Int_t AliTRDtrackV1::MakeBackupTrack()
520 // Creates a backup track
521 // TO DO update quality check of the track.
524 Float_t occupancy(0.); Int_t n(0), ncls(0);
525 for(Int_t il(AliTRDgeometry::kNlayer); il--;){
526 if(!fTracklet[il]) continue;
528 occupancy+=fTracklet[il]->GetTBoccupancy()/AliTRDseedV1::kNtb;
529 ncls += fTracklet[il]->GetN();
534 //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
536 Int_t failedCutId(0);
537 if(GetChi2()/n > 5.0) failedCutId=1;
538 if(occupancy < 0.7) failedCutId=2;
539 //if(ratio1 > 0.6) &&
540 //if(ratio0+ratio1 > 1.5) &&
541 if(GetNCross() != 0) failedCutId=3;
542 if(TMath::Abs(GetSnp()) > 0.85) failedCutId=4;
543 if(ncls < 20) failedCutId=5;
546 AliDebug(2, Form("\n"
547 "chi2/tracklet < 5.0 [%c] %5.2f\n"
548 "occupancy > 0.7 [%c] %4.2f\n"
549 "NCross == 0 [%c] %d\n"
550 "Abs(snp) < 0.85 [%c] %4.2f\n"
551 "NClusters > 20 [%c] %d"
552 ,(GetChi2()/n<5.0)?'y':'n', GetChi2()/n
553 ,(occupancy>0.7)?'y':'n', occupancy
554 ,(GetNCross()==0)?'y':'n', GetNCross()
555 ,(TMath::Abs(GetSnp())<0.85)?'y':'n', TMath::Abs(GetSnp())
556 ,(ncls>20)?'y':'n', ncls
562 fBackupTrack->~AliTRDtrackV1();
563 new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
566 fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
570 //_____________________________________________________________________________
571 Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z) const
574 // Find a prolongation at given x
575 // Return -1 if it does not exist
578 Double_t bz = GetBz();
579 if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return -1;
580 if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return -1;
586 //_____________________________________________________________________________
587 Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
590 // Propagates this track to a reference plane defined by "xk" [cm]
591 // correcting for the mean crossed material.
593 // "xx0" - thickness/rad.length [units of the radiation length]
594 // "xrho" - thickness*density [g/cm^2]
597 if (TMath::Abs(xk - GetX())<AliTRDReconstructor::GetEpsilon()*0.1) return kTRUE; // 10% of the tracker precision
599 Double_t xyz0[3] = {GetX(), GetY(), GetZ()}, // track position BEFORE propagation
600 b[3]; // magnetic field
602 if(!AliExternalTrackParam::PropagateToBxByBz(xk,b)) return kFALSE;
604 // local track position AFTER propagation
605 Double_t xyz1[3] = {GetX(), GetY(), GetZ()};
606 // printf("x0[%6.2f] -> x1[%6.2f] dx[%6.2f] rho[%f]\n", xyz0[0], xyz1[0], xyz0[0]-xk, xrho/TMath::Abs(xyz0[0]-xk));
609 if (IsStartedTimeIntegral()) {
610 Double_t l2 = TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
611 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1])
612 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
613 Double_t crv = AliExternalTrackParam::GetC(b[2]);
614 if (TMath::Abs(l2*crv) > 0.0001) {
615 // Make correction for curvature if neccesary
616 l2 = 0.5 * TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
617 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1]));
618 l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
619 l2 = TMath::Sqrt(l2*l2 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
624 if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, GetMass())) return kFALSE;
630 Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
631 Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
632 if ((beta2 < 1.0e-10) ||
633 ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
637 Double_t dE = 0.153e-3 / beta2
638 * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
643 // Suspicious part - think about it ?
644 Double_t kinE = TMath::Sqrt(p2);
645 if (dE > 0.8*kinE) dE = 0.8 * kinE; //
646 if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch
653 Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation
654 Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2);
656 fCee += fX*fX * sigmac2;
664 //_____________________________________________________________________________
665 Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
668 // Propagate track to the radial position
669 // Rotation always connected to the last track position
677 Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
679 Double_t dir = (radius > r) ? -1.0 : 1.0;
681 for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
684 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
687 if(GetProlongation(x,y,z)<0) return -1;
688 xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
689 xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
692 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
694 param[1] = 100000000;
696 PropagateTo(x,param[1],param[0]*param[4]);
701 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
704 if(GetProlongation(r,y,z)<0) return -1;
705 xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
706 xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
709 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
712 param[1] = 100000000;
714 PropagateTo(r,param[1],param[0]*param[4]);
720 //_____________________________________________________________________________
721 void AliTRDtrackV1::Print(Option_t *o) const
723 // Print track status
724 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]));
725 AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
727 AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
728 AliInfo(Form("Ntr[%1d] NtrPID[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), GetNumberOfTrackletsPID(), fN, fLab));
731 const Double_t *curP = GetParameter();
732 for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
736 const Double_t *curC = GetCovariance();
737 for (Int_t i = 0, j=4, k=0; i<15; i++, k++){
738 printf("%7.2f ", curC[i]);
744 if(strcmp(o, "a")!=0) return;
746 for(Int_t ip=0; ip<kNplane; ip++){
747 if(!fTracklet[ip]) continue;
748 fTracklet[ip]->Print(o);
753 //_____________________________________________________________________________
754 Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
757 // Rotates track parameters in R*phi plane
758 // if absolute rotation alpha is in global system
759 // otherwise alpha rotation is relative to the current rotation angle
762 if (absolute) alpha -= GetAlpha();
765 return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
768 //___________________________________________________________
769 void AliTRDtrackV1::SetNumberOfClusters()
771 // Calculate the number of clusters attached to this track
774 for(int ip=0; ip<kNplane; ip++){
775 if(fTracklet[ip] && fTrackletIndex[ip] >= 0) ncls += fTracklet[ip]->GetN();
777 AliKalmanTrack::SetNumberOfClusters(ncls);
781 //_______________________________________________________________
782 void AliTRDtrackV1::SetOwner()
785 // Toggle ownership of tracklets
788 if(TestBit(kOwner)) return;
789 for (Int_t ip = 0; ip < kNplane; ip++) {
790 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
791 fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
792 fTracklet[ip]->SetOwner();
797 //_______________________________________________________________
798 void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *const trklt, Int_t index)
803 Int_t plane = trklt->GetPlane();
805 fTracklet[plane] = trklt;
806 fTrackletIndex[plane] = index;
809 //_______________________________________________________________
810 void AliTRDtrackV1::SetTrackIn()
812 // Save location of birth for the TRD track
813 // If the pointer is not valid allocate memory
815 const AliExternalTrackParam *op = dynamic_cast<const AliExternalTrackParam*>(this);
817 //printf("SetTrackIn() : fTrackLow[%p]\n", (void*)fTrackLow);
819 fTrackLow->~AliExternalTrackParam();
820 new(fTrackLow) AliExternalTrackParam(*op);
821 } else fTrackLow = new AliExternalTrackParam(*op);
824 //_______________________________________________________________
825 void AliTRDtrackV1::SetTrackOut(const AliExternalTrackParam *op)
827 // Save location of death for the TRD track
828 // If the pointer is not valid allocate memory
830 if(!op) op = dynamic_cast<const AliExternalTrackParam*>(this);
832 fTrackHigh->~AliExternalTrackParam();
833 new(fTrackHigh) AliExternalTrackParam(*op);
834 } else fTrackHigh = new AliExternalTrackParam(*op);
837 //_______________________________________________________________
838 void AliTRDtrackV1::UnsetTracklet(Int_t plane)
841 fTrackletIndex[plane] = -1;
842 fTracklet[plane] = NULL;
846 //_______________________________________________________________
847 void AliTRDtrackV1::UpdateChi2(Float_t chi2)
849 // Update chi2/track with one tracklet contribution
850 SetChi2(GetChi2() + chi2);
853 //_______________________________________________________________
854 void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
857 // Update the TRD PID information in the ESD track
860 // Int_t nslices = AliTRDcalibDB::Instance()->GetPIDResponse(fkReconstructor->GetRecoParam()->GetPIDmethod())->GetNumberOfSlices();
861 // number of tracklets used for PID calculation
862 UChar_t nPID = GetNumberOfTrackletsPID();
863 // number of tracklets attached to the track
864 UChar_t nTrk = GetNumberOfTracklets();
865 // pack the two numbers together and store them in the ESD
866 track->SetTRDntracklets(nPID | (nTrk<<3));
867 // allocate space to store raw PID signals dEdx & momentum
868 track->SetNumberOfTRDslices((AliTRDPIDResponse::kNslicesNN+3)*AliTRDgeometry::kNlayer);
870 Float_t p, sp; Double_t spd;
871 for (Int_t ip = 0; ip < kNplane; ip++) {
872 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
873 if(!fTracklet[ip]->HasPID()) continue;
874 fTracklet[ip]->CookdEdx(AliTRDPIDResponse::kNslicesNN);
875 const Float_t *dedx = fTracklet[ip]->GetdEdx();
876 for (Int_t js = 0; js < AliTRDPIDResponse::kNslicesNN; js++, dedx++){
877 track->SetTRDslice(*dedx, ip, js+1);
879 p = fTracklet[ip]->GetMomentum(&sp);
880 spd = sp; track->SetTRDmomentum(p, ip, &spd);
881 // store global quality per tracklet instead of momentum error
882 // 26.09.11 A.Bercuci
883 // first implementation store no. of time bins filled in tracklet (5bits see "y" bits) and
884 // no. of double clusters in case of pad row cross (4bits see "x" bits)
885 // bit map for tracklet quality xxxxyyyyy
886 // 27.10.11 A.Bercuci
887 // add chamber status bit "z" bit
888 // bit map for tracklet quality zxxxxyyyyy
889 // 12.11.11 A.Bercuci
890 // fit tracklet quality into the field fTRDTimeBin [Char_t]
891 // bit map for tracklet quality zxxyyyyy
892 // The information should be retrieved by the following functions of AliESDtrack for each TRD layer
893 // GetTRDtrkltOccupancy(layer) -> no of TB filled in tracklet
894 // GetTRDtrkltClCross(layer) -> no of TB filled in crossing pad rows
895 // IsTRDtrkltChmbGood(layer) -> status of the chamber from which the tracklet is found
896 Int_t nCross(fTracklet[ip]->IsRowCross()?fTracklet[ip]->GetTBcross():0); if(nCross>3) nCross = 3;
897 Char_t trackletQ = Char_t(fTracklet[ip]->GetTBoccupancy() | (nCross<<5) | (fTracklet[ip]->IsChmbGood()<<7));
898 track->SetTRDTimBin(trackletQ, ip);
899 track->SetTRDslice(fTracklet[ip]->GetdQdl(), ip, 0); // Set Summed dEdx into the first slice
901 // store PID probabilities
902 track->SetTRDpid(fPID);