]> git.uio.no Git - u/mrichter/AliRoot.git/blame - TRD/AliTRDtrackV1.cxx
git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
List of Changes:
[u/mrichter/AliRoot.git] / TRD / AliTRDtrackV1.cxx
CommitLineData
d9950a5a 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
16/* $Id$ */
17
203967fc 18#include "AliLog.h"
eb38ed55 19#include "AliESDtrack.h"
41880fac 20#include "AliTracker.h"
eb38ed55 21
d9950a5a 22#include "AliTRDtrackV1.h"
23#include "AliTRDcluster.h"
24#include "AliTRDcalibDB.h"
3afdab72 25#include "AliTRDReconstructor.h"
d9950a5a 26#include "AliTRDrecoParam.h"
27
d9950a5a 28ClassImp(AliTRDtrackV1)
29
0906e73e 30///////////////////////////////////////////////////////////////////////////////
31// //
32// Represents a reconstructed TRD track //
33// Local TRD Kalman track //
34// //
35// Authors: //
36// Alex Bercuci <A.Bercuci@gsi.de> //
37// Markus Fasel <M.Fasel@gsi.de> //
38// //
39///////////////////////////////////////////////////////////////////////////////
d9950a5a 40
41//_______________________________________________________________
3b57a3f7 42AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
eb2b4f91 43 ,fStatus(0)
3b57a3f7 44 ,fDE(0.)
215f7116 45 ,fReconstructor(0x0)
3b57a3f7 46 ,fBackupTrack(0x0)
e3cf3d02 47 ,fTrackLow(0x0)
48 ,fTrackHigh(0x0)
0906e73e 49{
d9950a5a 50 //
51 // Default constructor
52 //
6e49cfdb 53 //printf("AliTRDtrackV1::AliTRDtrackV1()\n");
e44586fb 54
3b57a3f7 55 for(int i =0; i<3; i++) fBudget[i] = 0.;
56
57 Float_t pid = 1./AliPID::kSPECIES;
58 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
59
60 for(int ip=0; ip<kNplane; ip++){
61 fTrackletIndex[ip] = 0xffff;
62 fTracklet[ip] = 0x0;
63 }
d9950a5a 64}
65
66//_______________________________________________________________
3b57a3f7 67AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
eb2b4f91 68 ,fStatus(ref.fStatus)
3b57a3f7 69 ,fDE(ref.fDE)
215f7116 70 ,fReconstructor(ref.fReconstructor)
3b57a3f7 71 ,fBackupTrack(0x0)
e3cf3d02 72 ,fTrackLow(0x0)
73 ,fTrackHigh(0x0)
d9950a5a 74{
75 //
3b57a3f7 76 // Copy constructor
d9950a5a 77 //
78
6e49cfdb 79 //printf("AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &)\n");
29b87567 80 SetBit(kOwner, kFALSE);
3b57a3f7 81 for(int ip=0; ip<kNplane; ip++){
82 fTrackletIndex[ip] = ref.fTrackletIndex[ip];
83 fTracklet[ip] = ref.fTracklet[ip];
84 }
e3cf3d02 85 if(ref.fTrackLow) fTrackLow = new AliExternalTrackParam(*ref.fTrackLow);
86 if(ref.fTrackHigh) fTrackHigh = new AliExternalTrackParam(*ref.fTrackHigh);
87
3b57a3f7 88 for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
89
90 for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
91
92 AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
d9950a5a 93}
94
95//_______________________________________________________________
3b57a3f7 96AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
eb2b4f91 97 ,fStatus(0)
3b57a3f7 98 ,fDE(0.)
215f7116 99 ,fReconstructor(0x0)
3b57a3f7 100 ,fBackupTrack(0x0)
e3cf3d02 101 ,fTrackLow(0x0)
102 ,fTrackHigh(0x0)
d9950a5a 103{
104 //
3b57a3f7 105 // Constructor from AliESDtrack
d9950a5a 106 //
107
3b57a3f7 108 SetLabel(t.GetLabel());
109 SetChi2(0.0);
110 SetMass(t.GetMass());
111 AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
112 Int_t ti[kNplane]; t.GetTRDtracklets(&ti[0]);
113 for(int ip=0; ip<kNplane; ip++){
114 fTrackletIndex[ip] = ti[ip] < 0 ? 0xffff : ti[ip];
115 fTracklet[ip] = 0x0;
116 }
117 for(int i =0; i<3; i++) fBudget[i] = 0.;
118
119 Float_t pid = 1./AliPID::kSPECIES;
120 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
121
122 const AliExternalTrackParam *par = &t;
123 if (t.GetStatus() & AliESDtrack::kTRDbackup) {
124 par = t.GetOuterParam();
125 if (!par) {
126 AliError("No backup info!");
127 par = &t;
128 }
129 }
130 Set(par->GetX()
131 ,par->GetAlpha()
132 ,par->GetParameter()
133 ,par->GetCovariance());
134
135 if(t.GetStatus() & AliESDtrack::kTIME) {
136 StartTimeIntegral();
137 Double_t times[10];
138 t.GetIntegratedTimes(times);
139 SetIntegratedTimes(times);
140 SetIntegratedLength(t.GetIntegratedLength());
141 }
d9950a5a 142}
143
d9950a5a 144//_______________________________________________________________
eb38ed55 145AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 *trklts, const Double_t p[5], const Double_t cov[15]
3b57a3f7 146 , Double_t x, Double_t alpha) : AliKalmanTrack()
eb2b4f91 147 ,fStatus(0)
3b57a3f7 148 ,fDE(0.)
215f7116 149 ,fReconstructor(0x0)
3b57a3f7 150 ,fBackupTrack(0x0)
e3cf3d02 151 ,fTrackLow(0x0)
152 ,fTrackHigh(0x0)
d9950a5a 153{
0906e73e 154 //
155 // The stand alone tracking constructor
156 // TEMPORARY !!!!!!!!!!!
157 // to check :
158 // 1. covariance matrix
159 // 2. dQdl calculation
160 //
d9950a5a 161
fb17de1f 162 Double_t cnv = GetBz() < 1.e-5 ? 1.e5 : 1.0 / (GetBz() * kB2C);
163 // Double_t cnv = 1.0 / (GetBz() * kB2C);
d9950a5a 164
165 Double_t pp[5] = { p[0]
166 , p[1]
93f695a3 167 , p[2]
d9950a5a 168 , p[3]
169 , p[4]*cnv };
170
171 Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
172 Double_t c32 = x*cov[13] - cov[ 8];
173 Double_t c20 = x*cov[10] - cov[ 3];
174 Double_t c21 = x*cov[11] - cov[ 4];
175 Double_t c42 = x*cov[14] - cov[12];
176
177 Double_t cc[15] = { cov[ 0]
178 , cov[ 1], cov[ 2]
179 , c20, c21, c22
180 , cov[ 6], cov[ 7], c32, cov[ 9]
181 , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
ae3fbe1f 182
183 Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
184 Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
185 Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
186 pp[4] = w0*p0 + w1*pp[4];
187 cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
188
d9950a5a 189 Set(x,alpha,pp,cc);
41702fec 190 Int_t ncls = 0;
3b57a3f7 191 for(int iplane=0; iplane<kNplane; iplane++){
41702fec 192 fTrackletIndex[iplane] = 0xffff;
193 if(!trklts[iplane].IsOK()) fTracklet[iplane] = 0x0;
194 else{
76b60503 195 fTracklet[iplane] = &trklts[iplane];
41702fec 196 ncls += fTracklet[iplane]->GetN();
197 }
d9950a5a 198 }
41702fec 199 AliKalmanTrack::SetNumberOfClusters(ncls);
200 for(int i =0; i<3; i++) fBudget[i] = 0.;
201
202 Float_t pid = 1./AliPID::kSPECIES;
203 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
204
d9950a5a 205}
206
bb56afff 207//_______________________________________________________________
3b57a3f7 208AliTRDtrackV1::~AliTRDtrackV1()
bb56afff 209{
e44586fb 210 //AliInfo("");
6e49cfdb 211 //printf("I-AliTRDtrackV1::~AliTRDtrackV1() : Owner[%s]\n", TestBit(kOwner)?"YES":"NO");
76b60503 212
e3cf3d02 213 if(fBackupTrack) delete fBackupTrack; fBackupTrack = 0x0;
214
215 if(fTrackLow) delete fTrackLow; fTrackLow = 0x0;
216 if(fTrackHigh) delete fTrackHigh; fTrackHigh = 0x0;
bb56afff 217
76b60503 218 for(Int_t ip=0; ip<kNplane; ip++){
219 if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
220 fTracklet[ip] = 0x0;
221 fTrackletIndex[ip] = 0xffff;
3b57a3f7 222 }
223}
224
225//_______________________________________________________________
226Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
227{
228 // set MC label for this track
bb2db46c 229 if(!GetNumberOfClusters()) return kFALSE;
230
bb56afff 231 Int_t s[kMAXCLUSTERSPERTRACK][2];
232 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
233 s[i][0] = -1;
234 s[i][1] = 0;
235 }
3b57a3f7 236
bb56afff 237 Bool_t labelAdded;
3b57a3f7 238 Int_t label;
239 AliTRDcluster *c = 0x0;
240 for (Int_t ip = 0; ip < kNplane; ip++) {
241 if(fTrackletIndex[ip] == 0xffff) continue;
8d2bec9e 242 for (Int_t ic = 0; ic < AliTRDseedV1::kNclusters; ic++) {
3b57a3f7 243 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
244 for (Int_t k = 0; k < 3; k++) {
245 label = c->GetLabel(k);
246 labelAdded = kFALSE;
247 Int_t j = 0;
248 if (label >= 0) {
249 while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) {
250 if ((s[j][0] == label) ||
251 (s[j][1] == 0)) {
252 s[j][0] = label;
253 s[j][1]++;
254 labelAdded = kTRUE;
255 }
256 j++;
257 }
258 }
259 }
260 }
261 }
262
bb56afff 263 Int_t max = 0;
264 label = -123456789;
265 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
266 if (s[i][1] <= max) continue;
3b57a3f7 267 max = s[i][1];
268 label = s[i][0];
bb56afff 269 }
bb56afff 270 if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
3b57a3f7 271
bb56afff 272 SetLabel(label);
3b57a3f7 273
274 return kTRUE;
bb56afff 275}
276
d9950a5a 277//_______________________________________________________________
278Bool_t AliTRDtrackV1::CookPID()
279{
0906e73e 280 //
281 // Cook the PID information
282 //
3b57a3f7 283
284 // Reset the a priori probabilities
285 Double_t pid = 1. / AliPID::kSPECIES;
eb2b4f91 286 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fPID[ispec] = pid;
287
288 UChar_t fPIDquality = SetNumberOfTrackletsPID(kTRUE);
289 // no tracklet found for PID calculations
290 if(!fPIDquality) return kFALSE;
291
292 // slot for PID calculation @ track level
293
294 // normalize probabilities
295 Double_t probTotal = 0.0;
296 for (Int_t is = 0; is < AliPID::kSPECIES; is++) probTotal += fPID[is];
297
298
299 if (probTotal <= 0.0) {
300 AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference data.");
301 return kFALSE;
3b57a3f7 302 }
3b57a3f7 303
eb2b4f91 304 for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal;
305
306 return kTRUE;
307}
308
309//___________________________________________________________
310UChar_t AliTRDtrackV1::GetNumberOfTrackletsPID() const
311{
312// Retrieve number of tracklets used for PID calculation.
313
314 UChar_t fPIDquality = 0;
e3cf3d02 315 Float_t *prob = 0x0;
3b57a3f7 316 for(int ip=0; ip<kNplane; ip++){
317 if(fTrackletIndex[ip] == 0xffff) continue;
318 if(!fTracklet[ip]->IsOK()) continue;
eb2b4f91 319 if(!(prob = fTracklet[ip]->GetProbability(kFALSE))) return 0;
3b57a3f7 320
321 Int_t nspec = 0; // quality check of tracklet dEdx
322 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
323 if(prob[ispec] < 0.) continue;
3b57a3f7 324 nspec++;
325 }
326 if(!nspec) continue;
327
328 fPIDquality++;
0906e73e 329 }
eb2b4f91 330 return fPIDquality;
331}
332
333//___________________________________________________________
334UChar_t AliTRDtrackV1::SetNumberOfTrackletsPID(Bool_t recalc)
335{
336// Retrieve number of tracklets used for PID calculation. // Recalculated PID at tracklet level by quering the PID DB.
337
338 UChar_t fPIDquality = 0;
0906e73e 339
eb2b4f91 340 // steer PID calculation @ tracklet level
341 Float_t *prob = 0x0;
342 for(int ip=0; ip<kNplane; ip++){
343 if(fTrackletIndex[ip] == 0xffff) continue;
344 if(!fTracklet[ip]->IsOK()) continue;
345 if(!(prob = fTracklet[ip]->GetProbability(recalc))) return 0;
346
347 Int_t nspec = 0; // quality check of tracklet dEdx
348 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
349 if(prob[ispec] < 0.) continue;
350 fPID[ispec] *= prob[ispec];
351 nspec++;
352 }
353 if(!nspec) continue;
354
355 fPIDquality++;
d9950a5a 356 }
eb2b4f91 357 return fPIDquality;
d9950a5a 358}
359
0349cc67 360//_______________________________________________________________
361AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
362{
363 Int_t n = 0;
364 for(Int_t ip=0; ip<kNplane; ip++){
365 if(!fTracklet[ip]) continue;
366 if(n+fTracklet[ip]->GetN() <= id){
367 n+=fTracklet[ip]->GetN();
368 continue;
369 }
370 AliTRDcluster *c = 0x0;
8d2bec9e 371 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
0349cc67 372 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
373
374 if(n<id){n++; continue;}
375 return c;
376 }
377 }
378 return 0x0;
379}
380
3b57a3f7 381//_______________________________________________________________
382Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
383{
384 Int_t n = 0;
385 for(Int_t ip=0; ip<kNplane; ip++){
386 if(!fTracklet[ip]) continue;
76b60503 387 if(n+fTracklet[ip]->GetN() <= id){
3b57a3f7 388 n+=fTracklet[ip]->GetN();
389 continue;
390 }
76b60503 391 AliTRDcluster *c = 0x0;
8d2bec9e 392 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
76b60503 393 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
394
395 if(n<id){n++; continue;}
3b57a3f7 396 return fTracklet[ip]->GetIndexes(ic);
397 }
398 }
399 return -1;
0906e73e 400}
d9950a5a 401
402//_______________________________________________________________
b72f4eaf 403Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
d9950a5a 404{
ed15ef4f 405// Compute chi2 between tracklet and track. The value is calculated at the radial position of the track
406// equal to the reference radial position of the tracklet (see AliTRDseedV1)
407//
408// The chi2 estimator is computed according to the following formula
409// BEGIN_LATEX
410// #chi^{2}=(X_{trklt}-X_{track})(C_{trklt}+C_{track})^{-1}(X_{trklt}-X_{track})^{T}
411// END_LATEX
412// where X=(y z), the position of the track/tracklet in the yz plane
413//
414
b72f4eaf 415 Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
416 trklt->GetCovAt(trklt->GetX(), cov);
ed15ef4f 417 return AliExternalTrackParam::GetPredictedChi2(p, cov);
3b57a3f7 418}
d9950a5a 419
eb2b4f91 420//_______________________________________________________________
421Int_t AliTRDtrackV1::GetSector() const
422{
423 return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
424}
425
203967fc 426//_______________________________________________________________
427Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
428{
429 if (!o) return kFALSE;
430 const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
431 if (!inTrack) return kFALSE;
432
eb2b4f91 433 //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
203967fc 434
435 for(Int_t i = 0; i < AliPID::kSPECIES; i++){
436 if ( fPID[i] != inTrack->GetPID(i) ) return kFALSE;
437 }
438
439 for (Int_t i = 0; i < 3; i++){
440 if ( fBudget[i] != inTrack->GetBudget(i) ) return kFALSE;
441 }
442 if ( fDE != inTrack->GetEdep() ) return kFALSE;
443 if ( fFakeRatio != inTrack->GetFakeRatio() ) return kFALSE;
444 if ( fChi2 != inTrack->GetChi2() ) return kFALSE;
445 if ( fMass != inTrack->GetMass() ) return kFALSE;
446 if ( fLab != inTrack->GetLabel() ) return kFALSE;
447 if ( fN != inTrack->GetNumberOfClusters() ) return kFALSE;
448 if ( AliKalmanTrack::GetIntegratedLength() != inTrack->GetIntegratedLength() ) return kFALSE;
449
450 if ( GetX() != inTrack->GetX() ) return kFALSE;
451 if ( GetAlpha() != inTrack->GetAlpha() ) return kFALSE;
452 const Double_t *inP = inTrack->GetParameter();
453 const Double_t *curP = GetParameter();
454 for (Int_t i = 0; i < 5; i++){
455 if ( curP[i] != inP[i]) return kFALSE;
456 }
457 const Double_t *inC = inTrack->GetCovariance();
458 const Double_t *curC = GetCovariance();
459 for (Int_t i = 0; i < 15; i++){
460 if ( curC[i] != inC[i]) return kFALSE;
461 }
462
463 for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
464 AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
465 AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
466 if (curTracklet && inTracklet){
467 if (! curTracklet->IsEqual(inTracklet) ) {
468 curTracklet->Print();
469 inTracklet->Print();
470 return kFALSE;
471 }
472 } else {
473 // if one tracklet exists, and corresponding
474 // in other track doesn't - return kFALSE
475 if(inTracklet || curTracklet) return kFALSE;
476 }
477 }
478
479 return kTRUE;
480}
481
22a4ab0c 482//_______________________________________________________________
483Bool_t AliTRDtrackV1::IsElectron() const
484{
215f7116 485 if(GetPID(0) > fReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
22a4ab0c 486 return kFALSE;
487}
488
3b57a3f7 489
490//_____________________________________________________________________________
491void AliTRDtrackV1::MakeBackupTrack()
492{
493 //
494 // Creates a backup track
495 //
496
497 if(fBackupTrack) {
498 fBackupTrack->~AliTRDtrackV1();
499 new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
592fdd48 500 return;
3b57a3f7 501 }
502 fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
d9950a5a 503}
504
3b57a3f7 505//_____________________________________________________________________________
506Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z)
507{
508 //
509 // Find a prolongation at given x
510 // Return 0 if it does not exist
511 //
512
513 Double_t bz = GetBz();
514 if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return 0;
515 if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return 0;
516
517 return 1;
518
519}
520
521//_____________________________________________________________________________
522Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
0906e73e 523{
524 //
3b57a3f7 525 // Propagates this track to a reference plane defined by "xk" [cm]
526 // correcting for the mean crossed material.
0906e73e 527 //
3b57a3f7 528 // "xx0" - thickness/rad.length [units of the radiation length]
529 // "xrho" - thickness*density [g/cm^2]
530 //
0906e73e 531
3b57a3f7 532 if (xk == GetX()) {
533 return kTRUE;
534 }
535
536 Double_t oldX = GetX();
537 Double_t oldY = GetY();
538 Double_t oldZ = GetZ();
539
540 Double_t bz = GetBz();
541
542 if (!AliExternalTrackParam::PropagateTo(xk,bz)) {
543 return kFALSE;
544 }
545
546 Double_t x = GetX();
547 Double_t y = GetY();
548 Double_t z = GetZ();
549
550 if (oldX < xk) {
551 xrho = -xrho;
552 if (IsStartedTimeIntegral()) {
553 Double_t l2 = TMath::Sqrt((x-oldX)*(x-oldX)
554 + (y-oldY)*(y-oldY)
555 + (z-oldZ)*(z-oldZ));
556 Double_t crv = AliExternalTrackParam::GetC(bz);
557 if (TMath::Abs(l2*crv) > 0.0001) {
558 // Make correction for curvature if neccesary
559 l2 = 0.5 * TMath::Sqrt((x-oldX)*(x-oldX)
560 + (y-oldY)*(y-oldY));
561 l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
562 l2 = TMath::Sqrt(l2*l2 + (z-oldZ)*(z-oldZ));
563 }
564 AddTimeStep(l2);
565 }
566 }
567
fd40f855 568 if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, GetMass())) return kFALSE;
569
3b57a3f7 570
571 {
572
573 // Energy losses
574 Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
575 Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
576 if ((beta2 < 1.0e-10) ||
577 ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
578 return kFALSE;
579 }
580
581 Double_t dE = 0.153e-3 / beta2
582 * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
583 * xrho;
584 fBudget[0] += xrho;
585
586 /*
587 // Suspicious part - think about it ?
588 Double_t kinE = TMath::Sqrt(p2);
589 if (dE > 0.8*kinE) dE = 0.8 * kinE; //
590 if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch
591 */
592
593 fDE += dE;
594
595 /*
596 // Suspicious ! I.B.
597 Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation
598 Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2);
599 fCcc += sigmac2;
600 fCee += fX*fX * sigmac2;
601 */
602
603 }
604
605 return kTRUE;
0906e73e 606}
3b57a3f7 607
87a7fa94 608//_____________________________________________________________________________
3b57a3f7 609Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
87a7fa94 610{
611 //
3b57a3f7 612 // Propagate track to the radial position
613 // Rotation always connected to the last track position
87a7fa94 614 //
615
3b57a3f7 616 Double_t xyz0[3];
617 Double_t xyz1[3];
618 Double_t y;
619 Double_t z;
620
621 Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
622 // Direction +-
623 Double_t dir = (radius > r) ? -1.0 : 1.0;
624
625 for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
626
627 GetXYZ(xyz0);
628 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
629 Rotate(alpha,kTRUE);
630 GetXYZ(xyz0);
631 GetProlongation(x,y,z);
632 xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
633 xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
634 xyz1[2] = z;
635 Double_t param[7];
83dea92e 636 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
3b57a3f7 637 if (param[1] <= 0) {
638 param[1] = 100000000;
639 }
640 PropagateTo(x,param[1],param[0]*param[4]);
641
642 }
643
644 GetXYZ(xyz0);
645 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
646 Rotate(alpha,kTRUE);
647 GetXYZ(xyz0);
648 GetProlongation(r,y,z);
649 xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
650 xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
651 xyz1[2] = z;
652 Double_t param[7];
83dea92e 653 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
3b57a3f7 654
655 if (param[1] <= 0) {
656 param[1] = 100000000;
87a7fa94 657 }
3b57a3f7 658 PropagateTo(r,param[1],param[0]*param[4]);
659
660 return 0;
661
87a7fa94 662}
663
203967fc 664//_____________________________________________________________________________
665void AliTRDtrackV1::Print(Option_t *o) const
666{
eb2b4f91 667 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 668 AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
669
670 AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
eb2b4f91 671 AliInfo(Form("Ntr[%1d] NtrPID[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), GetNumberOfTrackletsPID(), fN, fLab));
203967fc 672
673 if(strcmp(o, "a")!=0) return;
674 printf("|X| = (");
675 const Double_t *curP = GetParameter();
676 for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
677 printf(")\n");
678
679 printf("|V| = \n");
680 const Double_t *curC = GetCovariance();
681 for (Int_t i = 0, j=4, k=0; i<15; i++, k++){
682 printf("%7.2f ", curC[i]);
683 if(k==j){
684 printf("\n");
685 k=-1; j--;
686 }
687 }
688
689 for(Int_t ip=0; ip<kNplane; ip++){
690 if(!fTracklet[ip]) continue;
691 fTracklet[ip]->Print(o);
692 }
693}
694
695
3b57a3f7 696//_____________________________________________________________________________
697Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
698{
699 //
700 // Rotates track parameters in R*phi plane
701 // if absolute rotation alpha is in global system
702 // otherwise alpha rotation is relative to the current rotation angle
703 //
704
705 if (absolute) alpha -= GetAlpha();
706 //else fNRotate++;
707
708 return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
709}
87a7fa94 710
eb38ed55 711//___________________________________________________________
712void AliTRDtrackV1::SetNumberOfClusters()
713{
714// Calculate the number of clusters attached to this track
715
3b57a3f7 716 Int_t ncls = 0;
717 for(int ip=0; ip<kNplane; ip++){
718 if(fTracklet[ip] && fTrackletIndex[ip] != 0xffff) ncls += fTracklet[ip]->GetN();
719 }
720 AliKalmanTrack::SetNumberOfClusters(ncls);
eb38ed55 721}
722
723
0906e73e 724//_______________________________________________________________
3b57a3f7 725void AliTRDtrackV1::SetOwner()
0906e73e 726{
727 //
728 // Toggle ownership of tracklets
729 //
730
e44586fb 731 if(TestBit(kOwner)) return;
3b57a3f7 732 for (Int_t ip = 0; ip < kNplane; ip++) {
733 if(fTrackletIndex[ip] == 0xffff) continue;
734 fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
735 fTracklet[ip]->SetOwner();
736 }
e44586fb 737 SetBit(kOwner);
0906e73e 738}
739
d9950a5a 740//_______________________________________________________________
3b57a3f7 741void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *trklt, Int_t index)
d9950a5a 742{
743 //
0906e73e 744 // Set the tracklets
d9950a5a 745 //
3b57a3f7 746 Int_t plane = trklt->GetPlane();
76b60503 747
3b57a3f7 748 fTracklet[plane] = trklt;
749 fTrackletIndex[plane] = index;
d9950a5a 750}
751
e3cf3d02 752//_______________________________________________________________
753void AliTRDtrackV1::SetTrackLow()
754{
755 const AliExternalTrackParam *op = dynamic_cast<const AliExternalTrackParam*>(this);
756 fTrackLow = fTrackLow ? new(fTrackLow) AliExternalTrackParam(*op) : new AliExternalTrackParam(*op);
757}
758
759//_______________________________________________________________
760void AliTRDtrackV1::SetTrackHigh(const AliExternalTrackParam *op)
761{
762 if(!op) op = dynamic_cast<const AliExternalTrackParam*>(this);
763 fTrackHigh = fTrackHigh ? new(fTrackHigh) AliExternalTrackParam(*op) : new AliExternalTrackParam(*op);
764}
765
181d2c97 766//_______________________________________________________________
767void AliTRDtrackV1::UnsetTracklet(Int_t plane)
768{
769 if(plane<0 && plane >= kNplane) return;
770 fTrackletIndex[plane] = 0xffff;
771 fTracklet[plane] = 0x0;
772}
773
774
d9950a5a 775//_______________________________________________________________
b72f4eaf 776Bool_t AliTRDtrackV1::Update(Double_t *p, Double_t *cov, Double_t chi2)
d9950a5a 777{
778 //
b72f4eaf 779 // Update track
d9950a5a 780 //
d9950a5a 781 if(!AliExternalTrackParam::Update(p, cov)) return kFALSE;
b1957d3c 782
d9950a5a 783 // Register info to track
3b57a3f7 784 SetNumberOfClusters();
b72f4eaf 785 SetChi2(GetChi2() + chi2);
3b57a3f7 786 return kTRUE;
d9950a5a 787}
788
789//_______________________________________________________________
0906e73e 790void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
d9950a5a 791{
792 //
6984f7c1 793 // Update the TRD PID information in the ESD track
d9950a5a 794 //
6984f7c1 795
0d83b3a5 796 Int_t nslices = fReconstructor->IsEightSlices() ? (Int_t)AliTRDpidUtil::kNNslices : (Int_t)AliTRDpidUtil::kLQslices;
215f7116 797 track->SetNumberOfTRDslices(nslices);
3b57a3f7 798
ed15ef4f 799 Int_t n = 0;
6984f7c1 800 for (Int_t ip = 0; ip < kNplane; ip++) {
3b57a3f7 801 if(fTrackletIndex[ip] == 0xffff) continue;
ed15ef4f 802 n++;
2b436dfa 803 if(!fTracklet[ip]->IsOK()) continue;
215f7116 804 fTracklet[ip]->CookdEdx(nslices);
3b57a3f7 805 Float_t *dedx = fTracklet[ip]->GetdEdx();
215f7116 806 for (Int_t js = 0; js < nslices; js++, dedx++) track->SetTRDslice(*dedx, ip, js);
6984f7c1 807 }
0906e73e 808
eb2b4f91 809 UChar_t nPID = GetNumberOfTrackletsPID();
810 if(!nPID) track->SetTRDntracklets(n);
ed15ef4f 811 else {
812 track->SetTRDpid(fPID);
778a6a17 813 nPID |= (n<<3);
814 track->SetTRDntracklets(nPID);
ed15ef4f 815 }
d9950a5a 816}