coverity fix
[u/mrichter/AliRoot.git] / TRD / AliTRDtrackV1.cxx
CommitLineData
93fc2389 1
d9950a5a 2/**************************************************************************
3 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
7 * *
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 **************************************************************************/
16
17/* $Id$ */
18
203967fc 19#include "AliLog.h"
eb38ed55 20#include "AliESDtrack.h"
41880fac 21#include "AliTracker.h"
eb38ed55 22
d9950a5a 23#include "AliTRDtrackV1.h"
24#include "AliTRDcluster.h"
25#include "AliTRDcalibDB.h"
3afdab72 26#include "AliTRDReconstructor.h"
9dcc64cc 27#include "AliTRDPIDResponse.h"
d9950a5a 28#include "AliTRDrecoParam.h"
29
d9950a5a 30ClassImp(AliTRDtrackV1)
31
0906e73e 32///////////////////////////////////////////////////////////////////////////////
33// //
34// Represents a reconstructed TRD track //
35// Local TRD Kalman track //
36// //
37// Authors: //
38// Alex Bercuci <A.Bercuci@gsi.de> //
39// Markus Fasel <M.Fasel@gsi.de> //
40// //
41///////////////////////////////////////////////////////////////////////////////
d9950a5a 42
43//_______________________________________________________________
3b57a3f7 44AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
eb2b4f91 45 ,fStatus(0)
352cef8f 46 ,fESDid(0)
3b57a3f7 47 ,fDE(0.)
4d6aee34 48 ,fkReconstructor(NULL)
49 ,fBackupTrack(NULL)
50 ,fTrackLow(NULL)
51 ,fTrackHigh(NULL)
0906e73e 52{
d9950a5a 53 //
54 // Default constructor
55 //
6e49cfdb 56 //printf("AliTRDtrackV1::AliTRDtrackV1()\n");
e44586fb 57
3b57a3f7 58 for(int i =0; i<3; i++) fBudget[i] = 0.;
59
60 Float_t pid = 1./AliPID::kSPECIES;
61 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
62
63 for(int ip=0; ip<kNplane; ip++){
17896e82 64 fTrackletIndex[ip] = -1;
4d6aee34 65 fTracklet[ip] = NULL;
3b57a3f7 66 }
d9950a5a 67}
68
69//_______________________________________________________________
3b57a3f7 70AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
eb2b4f91 71 ,fStatus(ref.fStatus)
352cef8f 72 ,fESDid(ref.fESDid)
3b57a3f7 73 ,fDE(ref.fDE)
4d6aee34 74 ,fkReconstructor(ref.fkReconstructor)
75 ,fBackupTrack(NULL)
76 ,fTrackLow(NULL)
77 ,fTrackHigh(NULL)
d9950a5a 78{
79 //
3b57a3f7 80 // Copy constructor
d9950a5a 81 //
82
6e49cfdb 83 //printf("AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &)\n");
29b87567 84 SetBit(kOwner, kFALSE);
3b57a3f7 85 for(int ip=0; ip<kNplane; ip++){
86 fTrackletIndex[ip] = ref.fTrackletIndex[ip];
87 fTracklet[ip] = ref.fTracklet[ip];
88 }
e3cf3d02 89 if(ref.fTrackLow) fTrackLow = new AliExternalTrackParam(*ref.fTrackLow);
90 if(ref.fTrackHigh) fTrackHigh = new AliExternalTrackParam(*ref.fTrackHigh);
91
3b57a3f7 92 for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
93
94 for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
95
96 AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
d9950a5a 97}
98
99//_______________________________________________________________
3b57a3f7 100AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
eb2b4f91 101 ,fStatus(0)
352cef8f 102 ,fESDid(0)
3b57a3f7 103 ,fDE(0.)
4d6aee34 104 ,fkReconstructor(NULL)
105 ,fBackupTrack(NULL)
106 ,fTrackLow(NULL)
107 ,fTrackHigh(NULL)
d9950a5a 108{
109 //
3b57a3f7 110 // Constructor from AliESDtrack
d9950a5a 111 //
112
352cef8f 113 SetESDid(t.GetID());
3b57a3f7 114 SetLabel(t.GetLabel());
115 SetChi2(0.0);
0b433f72 116
117 SetMass(t.GetMass()/*0.000510*/);
3b57a3f7 118 AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
17896e82 119 Int_t ti[]={-1, -1, -1, -1, -1, -1}; t.GetTRDtracklets(&ti[0]);
3b57a3f7 120 for(int ip=0; ip<kNplane; ip++){
17896e82 121 fTrackletIndex[ip] = ti[ip];
4d6aee34 122 fTracklet[ip] = NULL;
3b57a3f7 123 }
124 for(int i =0; i<3; i++) fBudget[i] = 0.;
125
126 Float_t pid = 1./AliPID::kSPECIES;
127 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
128
129 const AliExternalTrackParam *par = &t;
130 if (t.GetStatus() & AliESDtrack::kTRDbackup) {
131 par = t.GetOuterParam();
132 if (!par) {
133 AliError("No backup info!");
134 par = &t;
135 }
136 }
137 Set(par->GetX()
138 ,par->GetAlpha()
139 ,par->GetParameter()
140 ,par->GetCovariance());
141
142 if(t.GetStatus() & AliESDtrack::kTIME) {
143 StartTimeIntegral();
144 Double_t times[10];
145 t.GetIntegratedTimes(times);
146 SetIntegratedTimes(times);
147 SetIntegratedLength(t.GetIntegratedLength());
148 }
d9950a5a 149}
150
151//_______________________________________________________________
e17f4785 152AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 * const trklts, const Double_t p[5], const Double_t cov[15]
3b57a3f7 153 , Double_t x, Double_t alpha) : AliKalmanTrack()
eb2b4f91 154 ,fStatus(0)
352cef8f 155 ,fESDid(0)
3b57a3f7 156 ,fDE(0.)
4d6aee34 157 ,fkReconstructor(NULL)
158 ,fBackupTrack(NULL)
159 ,fTrackLow(NULL)
160 ,fTrackHigh(NULL)
d9950a5a 161{
0906e73e 162 //
163 // The stand alone tracking constructor
164 // TEMPORARY !!!!!!!!!!!
165 // to check :
166 // 1. covariance matrix
167 // 2. dQdl calculation
168 //
d9950a5a 169
68f9b6bd 170 Double_t b(GetBz());
171 Double_t cnv = (TMath::Abs(b) < 1.e-5) ? 1.e5 : 1./GetBz()/kB2C;
172
d9950a5a 173 Double_t pp[5] = { p[0]
68f9b6bd 174 , p[1]
175 , p[2]
176 , p[3]
177 , p[4]*cnv };
178
d9950a5a 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];
68f9b6bd 184
d9950a5a 185 Double_t cc[15] = { cov[ 0]
186 , cov[ 1], cov[ 2]
187 , c20, c21, c22
188 , cov[ 6], cov[ 7], c32, cov[ 9]
189 , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
68f9b6bd 190
ae3fbe1f 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);
68f9b6bd 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]));
195
ae3fbe1f 196 pp[4] = w0*p0 + w1*pp[4];
197 cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
68f9b6bd 198 Set(x,alpha,pp,cc);
0217fcd0 199 AliDebug(2, Form("Init @ x[%6.2f] pt[%5.3f]", x, 1./pp[4]));
41702fec 200 Int_t ncls = 0;
68f9b6bd 201 for(int iplane=0; iplane<kNplane; iplane++){
17896e82 202 fTrackletIndex[iplane] = -1;
68f9b6bd 203 if(!trklts[iplane].IsOK()) fTracklet[iplane] = NULL;
41702fec 204 else{
e17f4785 205 fTracklet[iplane] = &trklts[iplane];
41702fec 206 ncls += fTracklet[iplane]->GetN();
207 }
68f9b6bd 208 }
41702fec 209 AliKalmanTrack::SetNumberOfClusters(ncls);
210 for(int i =0; i<3; i++) fBudget[i] = 0.;
211
212 Float_t pid = 1./AliPID::kSPECIES;
213 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
d9950a5a 214}
215
216//_______________________________________________________________
3b57a3f7 217AliTRDtrackV1::~AliTRDtrackV1()
bb56afff 218{
4d8f1bd9 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'));
76b60503 221
4d6aee34 222 if(fBackupTrack) delete fBackupTrack; fBackupTrack = NULL;
e3cf3d02 223
4d6aee34 224 if(fTrackLow) delete fTrackLow; fTrackLow = NULL;
225 if(fTrackHigh) delete fTrackHigh; fTrackHigh = NULL;
bb56afff 226
76b60503 227 for(Int_t ip=0; ip<kNplane; ip++){
228 if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
4d6aee34 229 fTracklet[ip] = NULL;
17896e82 230 fTrackletIndex[ip] = -1;
3b57a3f7 231 }
232}
233
234//_______________________________________________________________
e08a5492 235AliTRDtrackV1 &AliTRDtrackV1::operator=(const AliTRDtrackV1 &t)
236{
237 //
238 // Assignment operator
239 //
240
241 if (this != &t) {
5c5d503a 242 AliKalmanTrack::operator=(t);
e08a5492 243 ((AliTRDtrackV1 &) t).Copy(*this);
244 }
245
246 return *this;
247
248}
249
250//_____________________________________________________________________________
251void AliTRDtrackV1::Copy(TObject &t) const
252{
253 //
254 // Copy function
255 //
256
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;
264
265 for(Int_t ip = 0; ip < kNplane; ip++) {
266 ((AliTRDtrackV1 &) t).fTrackletIndex[ip] = fTrackletIndex[ip];
267 ((AliTRDtrackV1 &) t).fTracklet[ip] = fTracklet[ip];
268 }
269 if (fTrackLow) {
270 ((AliTRDtrackV1 &) t).fTrackLow = new AliExternalTrackParam(*fTrackLow);
271 }
272 if (fTrackHigh){
273 ((AliTRDtrackV1 &) t).fTrackHigh = new AliExternalTrackParam(*fTrackHigh);
274 }
275
276 for (Int_t i = 0; i < 3; i++) {
277 ((AliTRDtrackV1 &) t).fBudget[i] = fBudget[i];
278 }
279 for (Int_t is = 0; is < AliPID::kSPECIES; is++) {
280 ((AliTRDtrackV1 &) t).fPID[is] = fPID[is];
281 }
282
283}
284
285//_______________________________________________________________
3b57a3f7 286Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
287{
288 // set MC label for this track
bb2db46c 289 if(!GetNumberOfClusters()) return kFALSE;
290
bb56afff 291 Int_t s[kMAXCLUSTERSPERTRACK][2];
292 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
293 s[i][0] = -1;
294 s[i][1] = 0;
295 }
3b57a3f7 296
bb56afff 297 Bool_t labelAdded;
3b57a3f7 298 Int_t label;
4d6aee34 299 AliTRDcluster *c = NULL;
3b57a3f7 300 for (Int_t ip = 0; ip < kNplane; ip++) {
68f9b6bd 301 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
8d2bec9e 302 for (Int_t ic = 0; ic < AliTRDseedV1::kNclusters; ic++) {
3b57a3f7 303 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
304 for (Int_t k = 0; k < 3; k++) {
305 label = c->GetLabel(k);
306 labelAdded = kFALSE;
307 Int_t j = 0;
308 if (label >= 0) {
309 while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) {
310 if ((s[j][0] == label) ||
311 (s[j][1] == 0)) {
312 s[j][0] = label;
313 s[j][1]++;
314 labelAdded = kTRUE;
315 }
316 j++;
317 }
318 }
319 }
320 }
321 }
322
bb56afff 323 Int_t max = 0;
324 label = -123456789;
325 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
326 if (s[i][1] <= max) continue;
3b57a3f7 327 max = s[i][1];
328 label = s[i][0];
bb56afff 329 }
bb56afff 330 if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
3b57a3f7 331
bb56afff 332 SetLabel(label);
3b57a3f7 333
334 return kTRUE;
bb56afff 335}
336
337//_______________________________________________________________
d9950a5a 338Bool_t AliTRDtrackV1::CookPID()
339{
2a3191bb 340//
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.
345//
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.
348//Begin_Html
349//<img src="TRD/trackPID.gif">
350//End_Html
351//
9dcc64cc 352 const AliTRDPIDResponse *pidResponse = AliTRDcalibDB::Instance()->GetPIDResponse(fkReconstructor->GetRecoParam()->GetPIDmethod());
353 if(!pidResponse){
354 AliError("PID Response not available");
eb2b4f91 355 return kFALSE;
3b57a3f7 356 }
9dcc64cc 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();
3335de10 365 fTracklet[iseed]->SetPID();
9dcc64cc 366 if(pidResponse->GetPIDmethod() == AliTRDPIDResponse::kLQ1D){
367 dEdx[iseed] = fTracklet[iseed]->GetdQdl();
368 } else {
93fc2389 369 fTracklet[iseed]->CookdEdx(nslices);
9dcc64cc 370 const Float_t *trackletdEdx = fTracklet[iseed]->GetdEdx();
371 for(Int_t islice = 0; islice < nslices; islice++){
372 dEdx[iseed*nslices + islice] = trackletdEdx[islice];
373 }
9dcc64cc 374 }
375 }
376 pidResponse->GetResponse(nslices, dEdx, trackletP, fPID);
eb2b4f91 377 return kTRUE;
378}
379
380//___________________________________________________________
381UChar_t AliTRDtrackV1::GetNumberOfTrackletsPID() const
382{
383// Retrieve number of tracklets used for PID calculation.
384
e20bef2b 385 UChar_t nPID = 0;
3b57a3f7 386 for(int ip=0; ip<kNplane; ip++){
68f9b6bd 387 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
3b57a3f7 388 if(!fTracklet[ip]->IsOK()) continue;
3b57a3f7 389
e20bef2b 390 nPID++;
0906e73e 391 }
e20bef2b 392 return nPID;
eb2b4f91 393}
394
3b57a3f7 395//_______________________________________________________________
0349cc67 396AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
397{
4d6aee34 398 // Get the cluster at a certain position in the track
0349cc67 399 Int_t n = 0;
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();
404 continue;
405 }
4d6aee34 406 AliTRDcluster *c = NULL;
8d2bec9e 407 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
0349cc67 408 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
409
410 if(n<id){n++; continue;}
411 return c;
412 }
413 }
4d6aee34 414 return NULL;
0349cc67 415}
416
417//_______________________________________________________________
3b57a3f7 418Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
419{
4d6aee34 420 // Get the cluster index at a certain position in the track
3b57a3f7 421 Int_t n = 0;
422 for(Int_t ip=0; ip<kNplane; ip++){
423 if(!fTracklet[ip]) continue;
76b60503 424 if(n+fTracklet[ip]->GetN() <= id){
3b57a3f7 425 n+=fTracklet[ip]->GetN();
426 continue;
427 }
8d2bec9e 428 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
87f70a90 429 if(!(fTracklet[ip]->GetClusters(ic))) continue;
76b60503 430 if(n<id){n++; continue;}
3b57a3f7 431 return fTracklet[ip]->GetIndexes(ic);
432 }
433 }
434 return -1;
0906e73e 435}
d9950a5a 436
437//_______________________________________________________________
b72f4eaf 438Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
d9950a5a 439{
ed15ef4f 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)
442//
443// The chi2 estimator is computed according to the following formula
444// BEGIN_LATEX
445// #chi^{2}=(X_{trklt}-X_{track})(C_{trklt}+C_{track})^{-1}(X_{trklt}-X_{track})^{T}
446// END_LATEX
447// where X=(y z), the position of the track/tracklet in the yz plane
448//
449
b72f4eaf 450 Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
451 trklt->GetCovAt(trklt->GetX(), cov);
ed15ef4f 452 return AliExternalTrackParam::GetPredictedChi2(p, cov);
3b57a3f7 453}
d9950a5a 454
22a4ab0c 455//_______________________________________________________________
eb2b4f91 456Int_t AliTRDtrackV1::GetSector() const
457{
458 return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
459}
460
461//_______________________________________________________________
203967fc 462Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
463{
4d6aee34 464 // Checks whether two tracks are equal
203967fc 465 if (!o) return kFALSE;
466 const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
467 if (!inTrack) return kFALSE;
468
eb2b4f91 469 //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
203967fc 470
d8069611 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;
203967fc 488
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();
495 inTracklet->Print();
496 return kFALSE;
497 }
498 } else {
499 // if one tracklet exists, and corresponding
500 // in other track doesn't - return kFALSE
501 if(inTracklet || curTracklet) return kFALSE;
502 }
503 }
504
505 return kTRUE;
506}
507
508//_______________________________________________________________
22a4ab0c 509Bool_t AliTRDtrackV1::IsElectron() const
510{
4d6aee34 511 if(GetPID(0) > fkReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
22a4ab0c 512 return kFALSE;
513}
514
3b57a3f7 515
516//_____________________________________________________________________________
b453ef55 517Int_t AliTRDtrackV1::MakeBackupTrack()
3b57a3f7 518{
b453ef55 519//
520// Creates a backup track
521// TO DO update quality check of the track.
522//
523
524 Float_t occupancy(0.); Int_t n(0), ncls(0);
525 for(Int_t il(AliTRDgeometry::kNlayer); il--;){
526 if(!fTracklet[il]) continue;
527 n++;
5c5d503a 528 occupancy+=fTracklet[il]->GetTBoccupancy()/AliTRDseedV1::kNtb;
b453ef55 529 ncls += fTracklet[il]->GetN();
530 }
531 if(!n) return -1;
532 occupancy/=n;
533
534 //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
535
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;
544
545 if(failedCutId){
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
557 ));
558 return failedCutId;
559 }
3b57a3f7 560
561 if(fBackupTrack) {
562 fBackupTrack->~AliTRDtrackV1();
563 new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
b453ef55 564 return 0;
3b57a3f7 565 }
566 fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
b453ef55 567 return 0;
d9950a5a 568}
569
3b57a3f7 570//_____________________________________________________________________________
f8a9723f 571Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z) const
3b57a3f7 572{
573 //
574 // Find a prolongation at given x
530fb4e2 575 // Return -1 if it does not exist
3b57a3f7 576 //
577
578 Double_t bz = GetBz();
530fb4e2 579 if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return -1;
580 if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return -1;
3b57a3f7 581
582 return 1;
583
584}
585
586//_____________________________________________________________________________
15a2657d 587Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
0906e73e 588{
589 //
3b57a3f7 590 // Propagates this track to a reference plane defined by "xk" [cm]
591 // correcting for the mean crossed material.
0906e73e 592 //
3b57a3f7 593 // "xx0" - thickness/rad.length [units of the radiation length]
594 // "xrho" - thickness*density [g/cm^2]
595 //
0906e73e 596
952051c5 597 if (TMath::Abs(xk - GetX())<AliTRDReconstructor::GetEpsilon()*0.1) return kTRUE; // 10% of the tracker precision
dc5e390a 598
307aac71 599 Double_t xyz0[3] = {GetX(), GetY(), GetZ()}, // track position BEFORE propagation
dc5e390a 600 b[3]; // magnetic field
307aac71 601 GetBxByBz(b);
dc5e390a 602 if(!AliExternalTrackParam::PropagateToBxByBz(xk,b)) return kFALSE;
603
307aac71 604 // local track position AFTER propagation
605 Double_t xyz1[3] = {GetX(), GetY(), GetZ()};
2f4384e6 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));
dc5e390a 607 if(xyz0[0] < xk) {
5c5d503a 608 xrho = -xrho;
3b57a3f7 609 if (IsStartedTimeIntegral()) {
dc5e390a 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]));
6790f7d7 613 Double_t crv = AliExternalTrackParam::GetC(b[2]);
3b57a3f7 614 if (TMath::Abs(l2*crv) > 0.0001) {
615 // Make correction for curvature if neccesary
dc5e390a 616 l2 = 0.5 * TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
617 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1]));
3b57a3f7 618 l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
dc5e390a 619 l2 = TMath::Sqrt(l2*l2 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
3b57a3f7 620 }
621 AddTimeStep(l2);
622 }
623 }
15a2657d 624 if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, GetMass())) return kFALSE;
fd40f855 625
3b57a3f7 626
627 {
628
629 // Energy losses
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)) {
634 return kFALSE;
635 }
636
637 Double_t dE = 0.153e-3 / beta2
638 * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
639 * xrho;
640 fBudget[0] += xrho;
641
642 /*
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
647 */
648
649 fDE += dE;
650
651 /*
652 // Suspicious ! I.B.
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);
655 fCcc += sigmac2;
656 fCee += fX*fX * sigmac2;
657 */
658
659 }
660
661 return kTRUE;
0906e73e 662}
3b57a3f7 663
87a7fa94 664//_____________________________________________________________________________
3b57a3f7 665Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
87a7fa94 666{
667 //
3b57a3f7 668 // Propagate track to the radial position
669 // Rotation always connected to the last track position
87a7fa94 670 //
671
3b57a3f7 672 Double_t xyz0[3];
673 Double_t xyz1[3];
674 Double_t y;
675 Double_t z;
676
677 Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
678 // Direction +-
679 Double_t dir = (radius > r) ? -1.0 : 1.0;
680
681 for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
682
683 GetXYZ(xyz0);
684 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
685 Rotate(alpha,kTRUE);
686 GetXYZ(xyz0);
e20bef2b 687 if(GetProlongation(x,y,z)<0) return -1;
3b57a3f7 688 xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
689 xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
690 xyz1[2] = z;
691 Double_t param[7];
83dea92e 692 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
3b57a3f7 693 if (param[1] <= 0) {
694 param[1] = 100000000;
695 }
696 PropagateTo(x,param[1],param[0]*param[4]);
697
698 }
699
700 GetXYZ(xyz0);
701 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
702 Rotate(alpha,kTRUE);
703 GetXYZ(xyz0);
530fb4e2 704 if(GetProlongation(r,y,z)<0) return -1;
3b57a3f7 705 xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
706 xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
707 xyz1[2] = z;
708 Double_t param[7];
83dea92e 709 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
3b57a3f7 710
711 if (param[1] <= 0) {
712 param[1] = 100000000;
87a7fa94 713 }
3b57a3f7 714 PropagateTo(r,param[1],param[0]*param[4]);
715
716 return 0;
717
87a7fa94 718}
719
3b57a3f7 720//_____________________________________________________________________________
203967fc 721void AliTRDtrackV1::Print(Option_t *o) const
722{
4d6aee34 723 // Print track status
eb2b4f91 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]));
203967fc 725 AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
726
727 AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
eb2b4f91 728 AliInfo(Form("Ntr[%1d] NtrPID[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), GetNumberOfTrackletsPID(), fN, fLab));
203967fc 729
203967fc 730 printf("|X| = (");
731 const Double_t *curP = GetParameter();
732 for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
733 printf(")\n");
734
735 printf("|V| = \n");
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]);
739 if(k==j){
740 printf("\n");
741 k=-1; j--;
742 }
743 }
0217fcd0 744 if(strcmp(o, "a")!=0) return;
203967fc 745
746 for(Int_t ip=0; ip<kNplane; ip++){
747 if(!fTracklet[ip]) continue;
748 fTracklet[ip]->Print(o);
749 }
750}
751
752
753//_____________________________________________________________________________
3b57a3f7 754Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
755{
756 //
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
760 //
761
762 if (absolute) alpha -= GetAlpha();
763 //else fNRotate++;
764
765 return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
766}
87a7fa94 767
eb38ed55 768//___________________________________________________________
769void AliTRDtrackV1::SetNumberOfClusters()
770{
771// Calculate the number of clusters attached to this track
772
3b57a3f7 773 Int_t ncls = 0;
774 for(int ip=0; ip<kNplane; ip++){
68f9b6bd 775 if(fTracklet[ip] && fTrackletIndex[ip] >= 0) ncls += fTracklet[ip]->GetN();
3b57a3f7 776 }
777 AliKalmanTrack::SetNumberOfClusters(ncls);
eb38ed55 778}
779
780
0906e73e 781//_______________________________________________________________
3b57a3f7 782void AliTRDtrackV1::SetOwner()
0906e73e 783{
784 //
785 // Toggle ownership of tracklets
786 //
787
e44586fb 788 if(TestBit(kOwner)) return;
3b57a3f7 789 for (Int_t ip = 0; ip < kNplane; ip++) {
68f9b6bd 790 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
3b57a3f7 791 fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
792 fTracklet[ip]->SetOwner();
793 }
e44586fb 794 SetBit(kOwner);
0906e73e 795}
796
797//_______________________________________________________________
4d6aee34 798void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *const trklt, Int_t index)
d9950a5a 799{
800 //
0906e73e 801 // Set the tracklets
d9950a5a 802 //
3b57a3f7 803 Int_t plane = trklt->GetPlane();
76b60503 804
3b57a3f7 805 fTracklet[plane] = trklt;
806 fTrackletIndex[plane] = index;
d9950a5a 807}
808
809//_______________________________________________________________
a310e49b 810void AliTRDtrackV1::SetTrackIn()
e3cf3d02 811{
fc6d4c2d 812// Save location of birth for the TRD track
813// If the pointer is not valid allocate memory
814//
e3cf3d02 815 const AliExternalTrackParam *op = dynamic_cast<const AliExternalTrackParam*>(this);
fc6d4c2d 816
5d4510fe 817 //printf("SetTrackIn() : fTrackLow[%p]\n", (void*)fTrackLow);
fc6d4c2d 818 if(fTrackLow){
819 fTrackLow->~AliExternalTrackParam();
820 new(fTrackLow) AliExternalTrackParam(*op);
821 } else fTrackLow = new AliExternalTrackParam(*op);
e3cf3d02 822}
823
824//_______________________________________________________________
a310e49b 825void AliTRDtrackV1::SetTrackOut(const AliExternalTrackParam *op)
e3cf3d02 826{
fc6d4c2d 827// Save location of death for the TRD track
828// If the pointer is not valid allocate memory
829//
e3cf3d02 830 if(!op) op = dynamic_cast<const AliExternalTrackParam*>(this);
fc6d4c2d 831 if(fTrackHigh){
832 fTrackHigh->~AliExternalTrackParam();
833 new(fTrackHigh) AliExternalTrackParam(*op);
834 } else fTrackHigh = new AliExternalTrackParam(*op);
e3cf3d02 835}
836
837//_______________________________________________________________
181d2c97 838void AliTRDtrackV1::UnsetTracklet(Int_t plane)
839{
87f70a90 840 if(plane<0) return;
17896e82 841 fTrackletIndex[plane] = -1;
4d6aee34 842 fTracklet[plane] = NULL;
181d2c97 843}
844
845
846//_______________________________________________________________
ef867f55 847void AliTRDtrackV1::UpdateChi2(Float_t chi2)
d9950a5a 848{
ef867f55 849// Update chi2/track with one tracklet contribution
b72f4eaf 850 SetChi2(GetChi2() + chi2);
d9950a5a 851}
852
853//_______________________________________________________________
0906e73e 854void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
d9950a5a 855{
856 //
6984f7c1 857 // Update the TRD PID information in the ESD track
d9950a5a 858 //
6984f7c1 859
93fc2389 860// Int_t nslices = AliTRDcalibDB::Instance()->GetPIDResponse(fkReconstructor->GetRecoParam()->GetPIDmethod())->GetNumberOfSlices();
e20bef2b 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
93fc2389 868 track->SetNumberOfTRDslices((AliTRDPIDResponse::kNslicesNN+3)*AliTRDgeometry::kNlayer);
e20bef2b 869 // store raw signals
7b23a4e1 870 Float_t p, sp; Double_t spd;
6984f7c1 871 for (Int_t ip = 0; ip < kNplane; ip++) {
68f9b6bd 872 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
e20bef2b 873 if(!fTracklet[ip]->HasPID()) continue;
93fc2389 874 fTracklet[ip]->CookdEdx(AliTRDPIDResponse::kNslicesNN);
4d6aee34 875 const Float_t *dedx = fTracklet[ip]->GetdEdx();
93fc2389 876 for (Int_t js = 0; js < AliTRDPIDResponse::kNslicesNN; js++, dedx++){
93fc2389 877 track->SetTRDslice(*dedx, ip, js+1);
878 }
9dcc64cc 879 p = fTracklet[ip]->GetMomentum(&sp);
5c5d503a 880 // store global quality per tracklet instead of momentum error
881 // 26.09.11 A.Bercuci
882 // first implementation store no. of time bins filled in tracklet (5bits see "y" bits) and
883 // no. of double clusters in case of pad row cross (4bits see "x" bits)
884 // bit map for tracklet quality xxxxyyyyy
803dc399 885 // 27.10.11 A.Bercuci
886 // add chamber status bit "z" bit
887 // bit map for tracklet quality zxxxxyyyyy
5c5d503a 888 Int_t nCross(fTracklet[ip]->IsRowCross()?fTracklet[ip]->GetTBcross():0);
803dc399 889 spd = Double_t(fTracklet[ip]->GetTBoccupancy() | (nCross<<5) | (fTracklet[ip]->IsChmbGood()<<9));
7b23a4e1 890 track->SetTRDmomentum(p, ip, &spd);
9dcc64cc 891 track->SetTRDslice(fTracklet[ip]->GetdQdl(), ip, 0); // Set Summed dEdx into the first slice
6984f7c1 892 }
e20bef2b 893 // store PID probabilities
894 track->SetTRDpid(fPID);
d9950a5a 895}