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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
18#include "AliLog.h"
19#include "AliESDtrack.h"
20#include "AliTracker.h"
21
22#include "AliTRDtrackV1.h"
23#include "AliTRDcluster.h"
24#include "AliTRDcalibDB.h"
25#include "AliTRDReconstructor.h"
26#include "AliTRDrecoParam.h"
27
28ClassImp(AliTRDtrackV1)
29
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///////////////////////////////////////////////////////////////////////////////
40
41//_______________________________________________________________
42AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
43 ,fPIDquality(0)
44 ,fDE(0.)
45 ,fReconstructor(0x0)
46 ,fBackupTrack(0x0)
47{
48 //
49 // Default constructor
50 //
51 //printf("AliTRDtrackV1::AliTRDtrackV1()\n");
52
53 for(int i =0; i<3; i++) fBudget[i] = 0.;
54
55 Float_t pid = 1./AliPID::kSPECIES;
56 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
57
58 for(int ip=0; ip<kNplane; ip++){
59 fTrackletIndex[ip] = 0xffff;
60 fTracklet[ip] = 0x0;
61 }
62}
63
64//_______________________________________________________________
65AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
66 ,fPIDquality(ref.fPIDquality)
67 ,fDE(ref.fDE)
68 ,fReconstructor(ref.fReconstructor)
69 ,fBackupTrack(0x0)
70{
71 //
72 // Copy constructor
73 //
74
75 //printf("AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &)\n");
76 SetBit(kOwner, kFALSE);
77 for(int ip=0; ip<kNplane; ip++){
78 fTrackletIndex[ip] = ref.fTrackletIndex[ip];
79 fTracklet[ip] = ref.fTracklet[ip];
80 }
81
82 for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
83
84 for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
85
86 AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
87}
88
89//_______________________________________________________________
90AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
91 ,fPIDquality(0)
92 ,fDE(0.)
93 ,fReconstructor(0x0)
94 ,fBackupTrack(0x0)
95{
96 //
97 // Constructor from AliESDtrack
98 //
99
100 SetLabel(t.GetLabel());
101 SetChi2(0.0);
102 SetMass(t.GetMass());
103 AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
104 Int_t ti[kNplane]; t.GetTRDtracklets(&ti[0]);
105 for(int ip=0; ip<kNplane; ip++){
106 fTrackletIndex[ip] = ti[ip] < 0 ? 0xffff : ti[ip];
107 fTracklet[ip] = 0x0;
108 }
109 for(int i =0; i<3; i++) fBudget[i] = 0.;
110
111 Float_t pid = 1./AliPID::kSPECIES;
112 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
113
114 const AliExternalTrackParam *par = &t;
115 if (t.GetStatus() & AliESDtrack::kTRDbackup) {
116 par = t.GetOuterParam();
117 if (!par) {
118 AliError("No backup info!");
119 par = &t;
120 }
121 }
122 Set(par->GetX()
123 ,par->GetAlpha()
124 ,par->GetParameter()
125 ,par->GetCovariance());
126
127 if(t.GetStatus() & AliESDtrack::kTIME) {
128 StartTimeIntegral();
129 Double_t times[10];
130 t.GetIntegratedTimes(times);
131 SetIntegratedTimes(times);
132 SetIntegratedLength(t.GetIntegratedLength());
133 }
134}
135
136//_______________________________________________________________
137AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 *trklts, const Double_t p[5], const Double_t cov[15]
138 , Double_t x, Double_t alpha) : AliKalmanTrack()
139 ,fPIDquality(0)
140 ,fDE(0.)
141 ,fReconstructor(0x0)
142 ,fBackupTrack(0x0)
143{
144 //
145 // The stand alone tracking constructor
146 // TEMPORARY !!!!!!!!!!!
147 // to check :
148 // 1. covariance matrix
149 // 2. dQdl calculation
150 //
151
152 Double_t cnv = GetBz() < 1.e-5 ? 1.e5 : 1.0 / (GetBz() * kB2C);
153 // Double_t cnv = 1.0 / (GetBz() * kB2C);
154
155 Double_t pp[5] = { p[0]
156 , p[1]
157 , p[2]
158 , p[3]
159 , p[4]*cnv };
160
161 Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
162 Double_t c32 = x*cov[13] - cov[ 8];
163 Double_t c20 = x*cov[10] - cov[ 3];
164 Double_t c21 = x*cov[11] - cov[ 4];
165 Double_t c42 = x*cov[14] - cov[12];
166
167 Double_t cc[15] = { cov[ 0]
168 , cov[ 1], cov[ 2]
169 , c20, c21, c22
170 , cov[ 6], cov[ 7], c32, cov[ 9]
171 , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
172
173 Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
174 Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
175 Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
176 pp[4] = w0*p0 + w1*pp[4];
177 cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
178
179 Set(x,alpha,pp,cc);
180 Int_t ncls = 0;
181 for(int iplane=0; iplane<kNplane; iplane++){
182 fTrackletIndex[iplane] = 0xffff;
183 if(!trklts[iplane].IsOK()) fTracklet[iplane] = 0x0;
184 else{
185 fTracklet[iplane] = &trklts[iplane];
186 ncls += fTracklet[iplane]->GetN();
187 }
188 }
189 AliKalmanTrack::SetNumberOfClusters(ncls);
190 for(int i =0; i<3; i++) fBudget[i] = 0.;
191
192 Float_t pid = 1./AliPID::kSPECIES;
193 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
194
195}
196
197//_______________________________________________________________
198AliTRDtrackV1::~AliTRDtrackV1()
199{
200 //AliInfo("");
201 //printf("I-AliTRDtrackV1::~AliTRDtrackV1() : Owner[%s]\n", TestBit(kOwner)?"YES":"NO");
202
203 if(fBackupTrack) delete fBackupTrack;
204 fBackupTrack = 0x0;
205
206 for(Int_t ip=0; ip<kNplane; ip++){
207 if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
208 fTracklet[ip] = 0x0;
209 fTrackletIndex[ip] = 0xffff;
210 }
211}
212
213//_______________________________________________________________
214Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
215{
216 // set MC label for this track
217
218 Int_t s[kMAXCLUSTERSPERTRACK][2];
219 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
220 s[i][0] = -1;
221 s[i][1] = 0;
222 }
223
224 Bool_t labelAdded;
225 Int_t label;
226 AliTRDcluster *c = 0x0;
227 for (Int_t ip = 0; ip < kNplane; ip++) {
228 if(fTrackletIndex[ip] == 0xffff) continue;
229 for (Int_t ic = 0; ic < AliTRDseed::knTimebins; ic++) {
230 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
231 for (Int_t k = 0; k < 3; k++) {
232 label = c->GetLabel(k);
233 labelAdded = kFALSE;
234 Int_t j = 0;
235 if (label >= 0) {
236 while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) {
237 if ((s[j][0] == label) ||
238 (s[j][1] == 0)) {
239 s[j][0] = label;
240 s[j][1]++;
241 labelAdded = kTRUE;
242 }
243 j++;
244 }
245 }
246 }
247 }
248 }
249
250 Int_t max = 0;
251 label = -123456789;
252 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
253 if (s[i][1] <= max) continue;
254 max = s[i][1];
255 label = s[i][0];
256 }
257
258 if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
259
260 SetLabel(label);
261
262 return kTRUE;
263}
264
265//_______________________________________________________________
266Bool_t AliTRDtrackV1::CookPID()
267{
268 //
269 // Cook the PID information
270 //
271
272 // Reset the a priori probabilities
273 Double_t pid = 1. / AliPID::kSPECIES;
274 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
275 fPID[ispec] = pid;
276 }
277 fPIDquality = 0;
278
279 // steer PID calculation @ tracklet level
280 Double_t *prob = 0x0;
281 for(int ip=0; ip<kNplane; ip++){
282 if(fTrackletIndex[ip] == 0xffff) continue;
283 if(!fTracklet[ip]->IsOK()) continue;
284 if(!(prob = fTracklet[ip]->GetProbability())) return kFALSE;
285
286 Int_t nspec = 0; // quality check of tracklet dEdx
287 for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
288 if(prob[ispec] < 0.) continue;
289 fPID[ispec] *= prob[ispec];
290 nspec++;
291 }
292 if(!nspec) continue;
293
294 fPIDquality++;
295 }
296
297 // no tracklet found for PID calculations
298 if(!fPIDquality) return kTRUE;
299
300 // slot for PID calculation @ track level
301
302
303 // normalize probabilities
304 Double_t probTotal = 0.0;
305 for (Int_t is = 0; is < AliPID::kSPECIES; is++) probTotal += fPID[is];
306
307
308 if (probTotal <= 0.0) {
309 AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference data.");
310 return kFALSE;
311 }
312
313 for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal;
314
315 return kTRUE;
316}
317
318//_______________________________________________________________
319AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
320{
321 Int_t n = 0;
322 for(Int_t ip=0; ip<kNplane; ip++){
323 if(!fTracklet[ip]) continue;
324 if(n+fTracklet[ip]->GetN() <= id){
325 n+=fTracklet[ip]->GetN();
326 continue;
327 }
328 AliTRDcluster *c = 0x0;
329 for(Int_t ic=AliTRDseed::knTimebins-1; ic>=0; ic--){
330 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
331
332 if(n<id){n++; continue;}
333 return c;
334 }
335 }
336 return 0x0;
337}
338
339//_______________________________________________________________
340Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
341{
342 Int_t n = 0;
343 for(Int_t ip=0; ip<kNplane; ip++){
344 if(!fTracklet[ip]) continue;
345 if(n+fTracklet[ip]->GetN() <= id){
346 n+=fTracklet[ip]->GetN();
347 continue;
348 }
349 AliTRDcluster *c = 0x0;
350 for(Int_t ic=AliTRDseed::knTimebins-1; ic>=0; ic--){
351 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
352
353 if(n<id){n++; continue;}
354 return fTracklet[ip]->GetIndexes(ic);
355 }
356 }
357 return -1;
358}
359
360//_______________________________________________________________
361Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt) const
362{
363 //
364 // Get the predicted chi2
365 //
366
367 Double_t x = trklt->GetX0();
368 Double_t p[2] = { trklt->GetYat(x)
369 , trklt->GetZat(x) };
370 Double_t cov[3];
371 trklt->GetCovAt(x, cov);
372
373 return AliExternalTrackParam::GetPredictedChi2(p, cov);
374}
375
376//_______________________________________________________________
377Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
378{
379 if (!o) return kFALSE;
380 const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
381 if (!inTrack) return kFALSE;
382
383 if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
384
385 for(Int_t i = 0; i < AliPID::kSPECIES; i++){
386 if ( fPID[i] != inTrack->GetPID(i) ) return kFALSE;
387 }
388
389 for (Int_t i = 0; i < 3; i++){
390 if ( fBudget[i] != inTrack->GetBudget(i) ) return kFALSE;
391 }
392 if ( fDE != inTrack->GetEdep() ) return kFALSE;
393 if ( fFakeRatio != inTrack->GetFakeRatio() ) return kFALSE;
394 if ( fChi2 != inTrack->GetChi2() ) return kFALSE;
395 if ( fMass != inTrack->GetMass() ) return kFALSE;
396 if ( fLab != inTrack->GetLabel() ) return kFALSE;
397 if ( fN != inTrack->GetNumberOfClusters() ) return kFALSE;
398 if ( AliKalmanTrack::GetIntegratedLength() != inTrack->GetIntegratedLength() ) return kFALSE;
399
400 if ( GetX() != inTrack->GetX() ) return kFALSE;
401 if ( GetAlpha() != inTrack->GetAlpha() ) return kFALSE;
402 const Double_t *inP = inTrack->GetParameter();
403 const Double_t *curP = GetParameter();
404 for (Int_t i = 0; i < 5; i++){
405 if ( curP[i] != inP[i]) return kFALSE;
406 }
407 const Double_t *inC = inTrack->GetCovariance();
408 const Double_t *curC = GetCovariance();
409 for (Int_t i = 0; i < 15; i++){
410 if ( curC[i] != inC[i]) return kFALSE;
411 }
412
413 for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
414 AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
415 AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
416 if (curTracklet && inTracklet){
417 if (! curTracklet->IsEqual(inTracklet) ) {
418 curTracklet->Print();
419 inTracklet->Print();
420 return kFALSE;
421 }
422 } else {
423 // if one tracklet exists, and corresponding
424 // in other track doesn't - return kFALSE
425 if(inTracklet || curTracklet) return kFALSE;
426 }
427 }
428
429 return kTRUE;
430}
431
432//_______________________________________________________________
433Bool_t AliTRDtrackV1::IsElectron() const
434{
435 if(GetPID(0) > fReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
436 return kFALSE;
437}
438
439
440//_____________________________________________________________________________
441void AliTRDtrackV1::MakeBackupTrack()
442{
443 //
444 // Creates a backup track
445 //
446
447 if(fBackupTrack) {
448 fBackupTrack->~AliTRDtrackV1();
449 new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
450 return;
451 }
452 fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
453}
454
455//_____________________________________________________________________________
456Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z)
457{
458 //
459 // Find a prolongation at given x
460 // Return 0 if it does not exist
461 //
462
463 Double_t bz = GetBz();
464 if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return 0;
465 if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return 0;
466
467 return 1;
468
469}
470
471//_____________________________________________________________________________
472Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
473{
474 //
475 // Propagates this track to a reference plane defined by "xk" [cm]
476 // correcting for the mean crossed material.
477 //
478 // "xx0" - thickness/rad.length [units of the radiation length]
479 // "xrho" - thickness*density [g/cm^2]
480 //
481
482 if (xk == GetX()) {
483 return kTRUE;
484 }
485
486 Double_t oldX = GetX();
487 Double_t oldY = GetY();
488 Double_t oldZ = GetZ();
489
490 Double_t bz = GetBz();
491
492 if (!AliExternalTrackParam::PropagateTo(xk,bz)) {
493 return kFALSE;
494 }
495
496 Double_t x = GetX();
497 Double_t y = GetY();
498 Double_t z = GetZ();
499
500 if (oldX < xk) {
501 xrho = -xrho;
502 if (IsStartedTimeIntegral()) {
503 Double_t l2 = TMath::Sqrt((x-oldX)*(x-oldX)
504 + (y-oldY)*(y-oldY)
505 + (z-oldZ)*(z-oldZ));
506 Double_t crv = AliExternalTrackParam::GetC(bz);
507 if (TMath::Abs(l2*crv) > 0.0001) {
508 // Make correction for curvature if neccesary
509 l2 = 0.5 * TMath::Sqrt((x-oldX)*(x-oldX)
510 + (y-oldY)*(y-oldY));
511 l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
512 l2 = TMath::Sqrt(l2*l2 + (z-oldZ)*(z-oldZ));
513 }
514 AddTimeStep(l2);
515 }
516 }
517
518 if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, GetMass())) return kFALSE;
519
520
521 {
522
523 // Energy losses
524 Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
525 Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
526 if ((beta2 < 1.0e-10) ||
527 ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
528 return kFALSE;
529 }
530
531 Double_t dE = 0.153e-3 / beta2
532 * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
533 * xrho;
534 fBudget[0] += xrho;
535
536 /*
537 // Suspicious part - think about it ?
538 Double_t kinE = TMath::Sqrt(p2);
539 if (dE > 0.8*kinE) dE = 0.8 * kinE; //
540 if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch
541 */
542
543 fDE += dE;
544
545 /*
546 // Suspicious ! I.B.
547 Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation
548 Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2);
549 fCcc += sigmac2;
550 fCee += fX*fX * sigmac2;
551 */
552
553 }
554
555 return kTRUE;
556}
557
558//_____________________________________________________________________________
559Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
560{
561 //
562 // Propagate track to the radial position
563 // Rotation always connected to the last track position
564 //
565
566 Double_t xyz0[3];
567 Double_t xyz1[3];
568 Double_t y;
569 Double_t z;
570
571 Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
572 // Direction +-
573 Double_t dir = (radius > r) ? -1.0 : 1.0;
574
575 for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
576
577 GetXYZ(xyz0);
578 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
579 Rotate(alpha,kTRUE);
580 GetXYZ(xyz0);
581 GetProlongation(x,y,z);
582 xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
583 xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
584 xyz1[2] = z;
585 Double_t param[7];
586 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
587 if (param[1] <= 0) {
588 param[1] = 100000000;
589 }
590 PropagateTo(x,param[1],param[0]*param[4]);
591
592 }
593
594 GetXYZ(xyz0);
595 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
596 Rotate(alpha,kTRUE);
597 GetXYZ(xyz0);
598 GetProlongation(r,y,z);
599 xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
600 xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
601 xyz1[2] = z;
602 Double_t param[7];
603 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
604
605 if (param[1] <= 0) {
606 param[1] = 100000000;
607 }
608 PropagateTo(r,param[1],param[0]*param[4]);
609
610 return 0;
611
612}
613
614//_____________________________________________________________________________
615void AliTRDtrackV1::Print(Option_t *o) const
616{
617 AliInfo(Form("PID q[%d] [%4.1f %4.1f %4.1f %4.1f %4.1f]", fPIDquality, 1.E2*fPID[0], 1.E2*fPID[1], 1.E2*fPID[2], 1.E2*fPID[3], 1.E2*fPID[4]));
618 AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
619
620 AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
621 AliInfo(Form("Ntr[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), fN, fLab));
622
623 if(strcmp(o, "a")!=0) return;
624 printf("|X| = (");
625 const Double_t *curP = GetParameter();
626 for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
627 printf(")\n");
628
629 printf("|V| = \n");
630 const Double_t *curC = GetCovariance();
631 for (Int_t i = 0, j=4, k=0; i<15; i++, k++){
632 printf("%7.2f ", curC[i]);
633 if(k==j){
634 printf("\n");
635 k=-1; j--;
636 }
637 }
638
639 for(Int_t ip=0; ip<kNplane; ip++){
640 if(!fTracklet[ip]) continue;
641 fTracklet[ip]->Print(o);
642 }
643}
644
645
646//_____________________________________________________________________________
647Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
648{
649 //
650 // Rotates track parameters in R*phi plane
651 // if absolute rotation alpha is in global system
652 // otherwise alpha rotation is relative to the current rotation angle
653 //
654
655 if (absolute) alpha -= GetAlpha();
656 //else fNRotate++;
657
658 return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
659}
660
661//___________________________________________________________
662void AliTRDtrackV1::SetNumberOfClusters()
663{
664// Calculate the number of clusters attached to this track
665
666 Int_t ncls = 0;
667 for(int ip=0; ip<kNplane; ip++){
668 if(fTracklet[ip] && fTrackletIndex[ip] != 0xffff) ncls += fTracklet[ip]->GetN();
669 }
670 AliKalmanTrack::SetNumberOfClusters(ncls);
671}
672
673
674//_______________________________________________________________
675void AliTRDtrackV1::SetOwner()
676{
677 //
678 // Toggle ownership of tracklets
679 //
680
681 if(TestBit(kOwner)) return;
682 for (Int_t ip = 0; ip < kNplane; ip++) {
683 if(fTrackletIndex[ip] == 0xffff) continue;
684 fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
685 fTracklet[ip]->SetOwner();
686 }
687 SetBit(kOwner);
688}
689
690//_______________________________________________________________
691void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *trklt, Int_t index)
692{
693 //
694 // Set the tracklets
695 //
696 Int_t plane = trklt->GetPlane();
697
698 fTracklet[plane] = trklt;
699 fTrackletIndex[plane] = index;
700}
701
702//_______________________________________________________________
703void AliTRDtrackV1::UnsetTracklet(Int_t plane)
704{
705 if(plane<0 && plane >= kNplane) return;
706 fTrackletIndex[plane] = 0xffff;
707 fTracklet[plane] = 0x0;
708}
709
710
711//_______________________________________________________________
712Bool_t AliTRDtrackV1::Update(AliTRDseedV1 *trklt, Double_t chisq)
713{
714 //
715 // Update track and tracklet parameters
716 //
717
718 Double_t x = GetX();
719 Double_t p[2] = { trklt->GetYat(x)
720 , trklt->GetZat(x) };
721 Double_t cov[3]/*, covR[3], cov0[3]*/;
722
723// printf("\tD[%3d] Ly[%d] Trk: x[%f] y[%f] z[%f]\n", trklt->GetDetector(), trklt->GetPlane(), GetX(), GetY(), GetZ());
724// //
725// Double_t xref = trklt->GetXref();
726// trklt->GetCovAt(xref, covR);
727// printf("xr=%5.3f y=%f+-%f z=%f+-%f (covYZ=%f)\n", xref, trklt->GetYat(xref), TMath::Sqrt(covR[0]), trklt->GetZat(xref), TMath::Sqrt(covR[2]), covR[1]);
728//
729// Double_t x0 = trklt->GetX0();
730// trklt->GetCovAt(x0, cov0);
731// printf("x0=%5.3f y=%f+-%f z=%f+-%f (covYZ=%f)\n", x0, trklt->GetYat(x0), TMath::Sqrt(cov0[0]), trklt->GetZat(x0), TMath::Sqrt(cov0[2]), cov0[1]);
732//
733// trklt->GetCovAt(x, cov);
734// printf("x =%5.3f y=%f+-%f z=%f+-%f (covYZ=%f)\n", x, p[0], TMath::Sqrt(cov[0]), p[1], TMath::Sqrt(cov[2]), cov[1]);
735//
736// const Double_t *cc = GetCovariance();
737// printf("yklm[0] = %f +- %f\n", GetY(), TMath::Sqrt(cc[0]));
738
739 trklt->GetCovAt(x, cov);
740 if(!AliExternalTrackParam::Update(p, cov)) return kFALSE;
741// cc = GetCovariance();
742// printf("yklm[1] = %f +- %f\n", GetY(), TMath::Sqrt(cc[0]));
743
744 AliTRDcluster *c = 0x0;
745 Int_t ic = 0; while(!(c = trklt->GetClusters(ic))) ic++;
746 AliTracker::FillResiduals(this, p, cov, c->GetVolumeId());
747
748 // Register info to track
749 SetNumberOfClusters();
750 SetChi2(GetChi2() + chisq);
751 return kTRUE;
752}
753
754//_______________________________________________________________
755void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
756{
757 //
758 // Update the TRD PID information in the ESD track
759 //
760
761 Int_t nslices = fReconstructor->IsEightSlices() ? (Int_t)AliTRDpidUtil::kNNslices : (Int_t)AliTRDpidUtil::kLQslices;
762 track->SetNumberOfTRDslices(nslices);
763
764 for (Int_t ip = 0; ip < kNplane; ip++) {
765 if(fTrackletIndex[ip] == 0xffff) continue;
766 if(!fTracklet[ip]->IsOK()) continue;
767 fTracklet[ip]->CookdEdx(nslices);
768 Float_t *dedx = fTracklet[ip]->GetdEdx();
769 for (Int_t js = 0; js < nslices; js++, dedx++) track->SetTRDslice(*dedx, ip, js);
770 }
771
772 // copy PID to ESD
773 if(!fPIDquality) return;
774 track->SetTRDpid(fPID);
775 track->SetTRDpidQuality(fPIDquality);
776}