TRD track crossing the material: storing the parameters and errors before the materia...
[u/mrichter/AliRoot.git] / TRD / AliTRDtracker.cxx
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46d29e70 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
0fa7dfa7 16/* $Id$ */
bbf92647 17
029cd327 18///////////////////////////////////////////////////////////////////////////////
19// //
20// The standard TRD tracker //
21// //
22///////////////////////////////////////////////////////////////////////////////
23
a2cb5b3d 24#include <Riostream.h>
46d29e70 25#include <TFile.h>
46d29e70 26#include <TBranch.h>
5443e65e 27#include <TTree.h>
c630aafd 28#include <TObjArray.h>
46d29e70 29
46d29e70 30#include "AliTRDgeometry.h"
5443e65e 31#include "AliTRDparameter.h"
3c625a9b 32#include "AliTRDgeometryHole.h"
46d29e70 33#include "AliTRDcluster.h"
34#include "AliTRDtrack.h"
b7a0917f 35#include "AliBarrelTrack.h"
36#include "AliESD.h"
46d29e70 37
38#include "AliTRDtracker.h"
39
40ClassImp(AliTRDtracker)
41
029cd327 42 const Float_t AliTRDtracker::fgkSeedDepth = 0.5;
43 const Float_t AliTRDtracker::fgkSeedStep = 0.10;
44 const Float_t AliTRDtracker::fgkSeedGap = 0.25;
5443e65e 45
029cd327 46 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ12 = 40.;
47 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ = 25.;
48 const Float_t AliTRDtracker::fgkMaxSeedC = 0.0052;
49 const Float_t AliTRDtracker::fgkMaxSeedTan = 1.2;
50 const Float_t AliTRDtracker::fgkMaxSeedVertexZ = 150.;
a819a5f7 51
029cd327 52 const Double_t AliTRDtracker::fgkSeedErrorSY = 0.2;
53 const Double_t AliTRDtracker::fgkSeedErrorSY3 = 2.5;
54 const Double_t AliTRDtracker::fgkSeedErrorSZ = 0.1;
bbf92647 55
029cd327 56 const Float_t AliTRDtracker::fgkMinClustersInSeed = 0.7;
bbf92647 57
029cd327 58 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
59 const Float_t AliTRDtracker::fgkMinFractionOfFoundClusters = 0.8;
bbf92647 60
029cd327 61 const Float_t AliTRDtracker::fgkSkipDepth = 0.3;
62 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
63 const Float_t AliTRDtracker::fgkWideRoad = 20.;
5443e65e 64
029cd327 65 const Double_t AliTRDtracker::fgkMaxChi2 = 12.;
a819a5f7 66
029cd327 67const Int_t AliTRDtracker::fgkFirstPlane = 5;
68const Int_t AliTRDtracker::fgkLastPlane = 17;
9c9d2487 69
bbf92647 70
89f05372 71//____________________________________________________________________
72AliTRDtracker::AliTRDtracker():AliTracker(),
73 fGeom(0),
74 fPar(0),
75 fNclusters(0),
76 fClusters(0),
77 fNseeds(0),
78 fSeeds(0),
79 fNtracks(0),
80 fTracks(0),
81 fSY2corr(0),
82 fSZ2corr(0),
83 fTimeBinsPerPlane(0),
84 fMaxGap(0),
85 fVocal(kFALSE),
86 fAddTRDseeds(kFALSE),
87 fNoTilt(kFALSE)
88{
b7a0917f 89 // Default constructor
90
89f05372 91 for(Int_t i=0;i<kTrackingSectors;i++) fTrSec[i]=0;
92 for(Int_t j=0;j<5;j++)
93 for(Int_t k=0;k<18;k++) fHoles[j][k]=kFALSE;
94}
46d29e70 95//____________________________________________________________________
c630aafd 96AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker()
46d29e70 97{
5443e65e 98 //
99 // Main constructor
100 //
46d29e70 101
c630aafd 102 //Float_t fTzero = 0;
b8dc2353 103
5443e65e 104 fAddTRDseeds = kFALSE;
5443e65e 105 fGeom = NULL;
b8dc2353 106 fNoTilt = kFALSE;
5443e65e 107
108 TDirectory *savedir=gDirectory;
109 TFile *in=(TFile*)geomfile;
110 if (!in->IsOpen()) {
111 printf("AliTRDtracker::AliTRDtracker(): geometry file is not open!\n");
112 printf(" DETAIL TRD geometry and DEFAULT TRD parameter will be used\n");
113 }
114 else {
115 in->cd();
c630aafd 116// in->ls();
5443e65e 117 fGeom = (AliTRDgeometry*) in->Get("TRDgeometry");
118 fPar = (AliTRDparameter*) in->Get("TRDparameter");
c630aafd 119// fGeom->Dump();
5443e65e 120 }
46d29e70 121
5443e65e 122 if(fGeom) {
123 // fTzero = geo->GetT0();
b8dc2353 124 printf("Found geometry version %d on file \n", fGeom->IsVersion());
5443e65e 125 }
126 else {
c630aafd 127 printf("AliTRDtracker::AliTRDtracker(): can't find TRD geometry!\n");
3c625a9b 128 //printf("The DETAIL TRD geometry will be used\n");
129 //fGeom = new AliTRDgeometryDetail();
130 fGeom = new AliTRDgeometryHole();
131 fGeom->SetPHOShole();
132 fGeom->SetRICHhole();
c630aafd 133 }
134
135 if (!fPar) {
136 printf("AliTRDtracker::AliTRDtracker(): can't find TRD parameter!\n");
137 printf("The DEFAULT TRD parameter will be used\n");
5443e65e 138 fPar = new AliTRDparameter();
139 }
c630aafd 140 fPar->ReInit();
5443e65e 141
142 savedir->cd();
46d29e70 143
5443e65e 144
145 // fGeom->SetT0(fTzero);
0a29d0f1 146
46d29e70 147 fNclusters = 0;
148 fClusters = new TObjArray(2000);
149 fNseeds = 0;
5443e65e 150 fSeeds = new TObjArray(2000);
46d29e70 151 fNtracks = 0;
5443e65e 152 fTracks = new TObjArray(1000);
a819a5f7 153
029cd327 154 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
155 Int_t trS = CookSectorIndex(geomS);
156 fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS, fPar);
3c625a9b 157 for (Int_t icham=0;icham<AliTRDgeometry::kNcham; icham++){
158 fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS);
159 }
5443e65e 160 }
a819a5f7 161
029cd327 162 Float_t tiltAngle = TMath::Abs(fPar->GetTiltingAngle());
163 if(tiltAngle < 0.1) {
b8dc2353 164 fNoTilt = kTRUE;
165 }
166
167 fSY2corr = 0.2;
168 fSZ2corr = 120.;
169
029cd327 170 if(fNoTilt && (tiltAngle > 0.1)) fSY2corr = fSY2corr + tiltAngle * 0.05;
b8dc2353 171
bbf92647 172
5443e65e 173 // calculate max gap on track
a819a5f7 174
5443e65e 175 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
176 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
a819a5f7 177
5443e65e 178 Double_t dx = (Double_t) fPar->GetTimeBinSize();
179 Int_t tbAmp = fPar->GetTimeBefore();
180 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 181 if(kTRUE) maxAmp = 0; // intentional until we change the parameter class
5443e65e 182 Int_t tbDrift = fPar->GetTimeMax();
183 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
a819a5f7 184
5443e65e 185 tbDrift = TMath::Min(tbDrift,maxDrift);
186 tbAmp = TMath::Min(tbAmp,maxAmp);
46d29e70 187
5443e65e 188 fTimeBinsPerPlane = tbAmp + tbDrift;
029cd327 189 fMaxGap = (Int_t) (fTimeBinsPerPlane * fGeom->Nplan() * fgkSkipDepth);
46d29e70 190
5443e65e 191 fVocal = kFALSE;
0a29d0f1 192
9c9d2487 193
194 // Barrel Tracks [SR, 03.04.2003]
195
196 fBarrelFile = 0;
197 fBarrelTree = 0;
198 fBarrelArray = 0;
199 fBarrelTrack = 0;
200
201 savedir->cd();
5443e65e 202}
46d29e70 203
5443e65e 204//___________________________________________________________________
205AliTRDtracker::~AliTRDtracker()
46d29e70 206{
029cd327 207 //
208 // Destructor of AliTRDtracker
209 //
210
89f05372 211 if (fClusters) {
212 fClusters->Delete();
213 delete fClusters;
214 }
215 if (fTracks) {
216 fTracks->Delete();
217 delete fTracks;
218 }
219 if (fSeeds) {
220 fSeeds->Delete();
221 delete fSeeds;
222 }
5443e65e 223 delete fGeom;
224 delete fPar;
0a29d0f1 225
029cd327 226 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
227 delete fTrSec[geomS];
5443e65e 228 }
229}
46d29e70 230
9c9d2487 231//_____________________________________________________________________
232
233void AliTRDtracker::SetBarrelTree(const char *mode) {
234 //
235 //
236 //
237
238 if (!IsStoringBarrel()) return;
239
240 TDirectory *sav = gDirectory;
241 if (!fBarrelFile) fBarrelFile = new TFile("AliBarrelTracks.root", "UPDATE");
242
243 char buff[40];
244 sprintf(buff, "BarrelTRD_%d_%s", GetEventNumber(), mode);
245
246 fBarrelFile->cd();
247 fBarrelTree = new TTree(buff, "Barrel TPC tracks");
248
029cd327 249 Int_t nRefs = fgkLastPlane - fgkFirstPlane + 1;
9c9d2487 250
251 if (!fBarrelArray) fBarrelArray = new TClonesArray("AliBarrelTrack", nRefs);
252 for(Int_t i=0; i<nRefs; i++) new((*fBarrelArray)[i]) AliBarrelTrack();
253
254 fBarrelTree->Branch("tracks", &fBarrelArray);
255 sav->cd();
256}
257
258//_____________________________________________________________________
259
260void AliTRDtracker::StoreBarrelTrack(AliTRDtrack *ps, Int_t refPlane, Int_t isIn) {
261 //
262 //
263 //
264
265 if (!IsStoringBarrel()) return;
266
267 static Int_t nClusters;
268 static Int_t nWrong;
269 static Double_t chi2;
270 static Int_t index;
271 static Bool_t wasLast = kTRUE;
272
273 Int_t newClusters, newWrong;
274 Double_t newChi2;
275
276 if (wasLast) {
277
278 fBarrelArray->Clear();
279 nClusters = nWrong = 0;
280 chi2 = 0.0;
281 index = 0;
282 wasLast = kFALSE;
283 }
284
285 fBarrelTrack = (AliBarrelTrack*)(*fBarrelArray)[index++];
286 ps->GetBarrelTrack(fBarrelTrack);
287
288 newClusters = ps->GetNumberOfClusters() - nClusters;
289 newWrong = ps->GetNWrong() - nWrong;
290 newChi2 = ps->GetChi2() - chi2;
291
292 nClusters = ps->GetNumberOfClusters();
293 nWrong = ps->GetNWrong();
294 chi2 = ps->GetChi2();
295
029cd327 296 if (refPlane != fgkLastPlane) {
9c9d2487 297 fBarrelTrack->SetNClusters(newClusters, newChi2);
298 fBarrelTrack->SetNWrongClusters(newWrong);
299 } else {
300 wasLast = kTRUE;
301 }
302
303 fBarrelTrack->SetRefPlane(refPlane, isIn);
304}
305
306//_____________________________________________________________________
307
308Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track) {
309 //
310 // Rotates the track when necessary
311 //
312
313 Double_t alpha = AliTRDgeometry::GetAlpha();
314 Double_t y = track->GetY();
315 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
316
c630aafd 317 //Int_t ns = AliTRDgeometry::kNsect;
9c9d2487 318 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
319
320 if (y > ymax) {
321 //s = (s+1) % ns;
322 if (!track->Rotate(alpha)) return kFALSE;
323 } else if (y <-ymax) {
324 //s = (s-1+ns) % ns;
325 if (!track->Rotate(-alpha)) return kFALSE;
326 }
327
328 return kTRUE;
329}
330
46d29e70 331//_____________________________________________________________________
5443e65e 332inline Double_t f1trd(Double_t x1,Double_t y1,
a9814c09 333 Double_t x2,Double_t y2,
334 Double_t x3,Double_t y3)
46d29e70 335{
0a29d0f1 336 //
46d29e70 337 // Initial approximation of the track curvature
0a29d0f1 338 //
46d29e70 339 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
340 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
341 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
342 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
343 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
344
345 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
346
347 return -xr*yr/sqrt(xr*xr+yr*yr);
348}
349
350//_____________________________________________________________________
5443e65e 351inline Double_t f2trd(Double_t x1,Double_t y1,
a9814c09 352 Double_t x2,Double_t y2,
353 Double_t x3,Double_t y3)
46d29e70 354{
0a29d0f1 355 //
5443e65e 356 // Initial approximation of the track curvature times X coordinate
357 // of the center of curvature
0a29d0f1 358 //
46d29e70 359
360 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
361 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
362 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
363 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
364 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
365
366 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
367
368 return -a/(d*y1-b)*xr/sqrt(xr*xr+yr*yr);
369}
370
371//_____________________________________________________________________
5443e65e 372inline Double_t f3trd(Double_t x1,Double_t y1,
a9814c09 373 Double_t x2,Double_t y2,
374 Double_t z1,Double_t z2)
46d29e70 375{
0a29d0f1 376 //
46d29e70 377 // Initial approximation of the tangent of the track dip angle
0a29d0f1 378 //
46d29e70 379
380 return (z1 - z2)/sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
381}
382
46e2d86c 383
384AliTRDcluster * AliTRDtracker::GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin){
385 //
386 //try to find cluster in the backup list
387 //
388 AliTRDcluster * cl =0;
389 UInt_t *indexes = track->GetBackupIndexes();
390 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
391 if (indexes[i]==0) break;
392 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
393 if (!cli) break;
394 if (cli->GetLocalTimeBin()!=timebin) continue;
395 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
396 if (iplane==plane) {
397 cl = cli;
398 break;
399 }
400 }
401 return cl;
402}
403
3c625a9b 404
405Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * track){
406 //
407 //return last updated plane
408 Int_t lastplane=0;
409 UInt_t *indexes = track->GetBackupIndexes();
410 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
411 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
412 if (!cli) break;
413 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
414 if (iplane>lastplane) {
415 lastplane = iplane;
416 }
417 }
418 return lastplane;
419}
c630aafd 420//___________________________________________________________________
421Int_t AliTRDtracker::Clusters2Tracks(AliESD* event)
422{
423 //
424 // Finds tracks within the TRD. The ESD event is expected to contain seeds
425 // at the outer part of the TRD. The seeds
426 // are found within the TRD if fAddTRDseeds is TRUE.
427 // The tracks are propagated to the innermost time bin
428 // of the TRD and the ESD event is updated
429 //
430
431 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
029cd327 432 Float_t foundMin = fgkMinClustersInTrack * timeBins;
c630aafd 433 Int_t nseed = 0;
434 Int_t found = 0;
435 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
436
437 Int_t n = event->GetNumberOfTracks();
438 for (Int_t i=0; i<n; i++) {
439 AliESDtrack* seed=event->GetTrack(i);
440 ULong_t status=seed->GetStatus();
441 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
442 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
443 nseed++;
444
445 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
46e2d86c 446 //seed2->ResetCovariance();
c630aafd 447 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
448 AliTRDtrack &t=*pt;
449 FollowProlongation(t, innerTB);
450 if (t.GetNumberOfClusters() >= foundMin) {
451 UseClusters(&t);
029cd327 452 CookLabel(pt, 1-fgkLabelFraction);
c630aafd 453 // t.CookdEdx();
454 }
455 found++;
456// cout<<found<<'\r';
457
458 if(PropagateToTPC(t)) {
459 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
460 }
461 delete seed2;
462 delete pt;
463 }
464
465 cout<<"Number of loaded seeds: "<<nseed<<endl;
466 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
467
468 // after tracks from loaded seeds are found and the corresponding
469 // clusters are used, look for additional seeds from TRD
470
471 if(fAddTRDseeds) {
472 // Find tracks for the seeds in the TRD
473 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
474
029cd327 475 Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
476 Int_t gap = (Int_t) (timeBins * fgkSeedGap);
477 Int_t step = (Int_t) (timeBins * fgkSeedStep);
c630aafd 478
479 // make a first turn with tight cut on initial curvature
480 for(Int_t turn = 1; turn <= 2; turn++) {
481 if(turn == 2) {
029cd327 482 nSteps = (Int_t) (fgkSeedDepth / (3*fgkSeedStep));
483 step = (Int_t) (timeBins * (3*fgkSeedStep));
c630aafd 484 }
485 for(Int_t i=0; i<nSteps; i++) {
486 Int_t outer=timeBins-1-i*step;
487 Int_t inner=outer-gap;
488
489 nseed=fSeeds->GetEntriesFast();
490
491 MakeSeeds(inner, outer, turn);
492
493 nseed=fSeeds->GetEntriesFast();
7bed16a7 494 // printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
495 // turn, i, nseed);
c630aafd 496
497 for (Int_t i=0; i<nseed; i++) {
498 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
499 FollowProlongation(t,innerTB);
500 if (t.GetNumberOfClusters() >= foundMin) {
501 UseClusters(&t);
029cd327 502 CookLabel(pt, 1-fgkLabelFraction);
c630aafd 503 t.CookdEdx();
504 found++;
505// cout<<found<<'\r';
506 if(PropagateToTPC(t)) {
507 AliESDtrack track;
508 track.UpdateTrackParams(pt,AliESDtrack::kTRDin);
509 event->AddTrack(&track);
c5a8e3df 510 // track.SetTRDtrack(new AliTRDtrack(*pt));
c630aafd 511 }
512 }
513 delete fSeeds->RemoveAt(i);
514 fNseeds--;
515 }
516 }
517 }
518 }
519
520 cout<<"Total number of found tracks: "<<found<<endl;
521
522 return 0;
523}
5443e65e 524
c630aafd 525
5443e65e 526
c630aafd 527//_____________________________________________________________________________
528Int_t AliTRDtracker::PropagateBack(AliESD* event) {
529 //
530 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
531 // backpropagated by the TPC tracker. Each seed is first propagated
532 // to the TRD, and then its prolongation is searched in the TRD.
533 // If sufficiently long continuation of the track is found in the TRD
534 // the track is updated, otherwise it's stored as originaly defined
535 // by the TPC tracker.
536 //
537
538 Int_t found=0;
c5a8e3df 539 Float_t foundMin = 20;
c630aafd 540
541 Int_t n = event->GetNumberOfTracks();
542 for (Int_t i=0; i<n; i++) {
543 AliESDtrack* seed=event->GetTrack(i);
544 ULong_t status=seed->GetStatus();
545 if ( (status & AliESDtrack::kTPCout ) == 0 ) continue;
546 if ( (status & AliESDtrack::kTRDout) != 0 ) continue;
547
548 Int_t lbl = seed->GetLabel();
549 AliTRDtrack *track = new AliTRDtrack(*seed);
550 track->SetSeedLabel(lbl);
551 fNseeds++;
7bed16a7 552 Float_t p4 = track->GetC();
553 //
3c625a9b 554 Int_t expectedClr = FollowBackProlongation(*track);
555 if (track->GetNumberOfClusters()<expectedClr/3){
556 AliTRDtrack *track1 = new AliTRDtrack(*seed);
557 track1->SetSeedLabel(lbl);
558 FollowBackProlongation(*track1);
559 AliTRDtrack *track2= new AliTRDtrack(*seed);
560 track->SetSeedLabel(lbl);
561 FollowBackProlongation(*track2);
562 delete track1;
563 delete track2;
564 }
7bed16a7 565 if (TMath::Abs(track->GetC()-p4)/TMath::Abs(p4)>0.2) {
566 delete track;
567 continue; //too big change of curvature - to be checked
568 }
c630aafd 569 Int_t foundClr = track->GetNumberOfClusters();
570 if (foundClr >= foundMin) {
571 if(foundClr >= 2) {
572 track->CookdEdx();
c5a8e3df 573 CookLabel(track, 1-fgkLabelFraction);
c630aafd 574 UseClusters(track);
575 }
576
577 // Propagate to outer reference plane [SR, GSI, 18.02.2003]
c5a8e3df 578 // track->PropagateTo(364.8); why?
c630aafd 579
580 //seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
581 //found++;
16d9fbba 582 if (track->GetNCross()==0) seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
583 else{
584 if (track->GetBackupTrack()) seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
585 }
c630aafd 586 }
587
1e9bb598 588 //Propagation to the TOF (I.Belikov)
3c625a9b 589
590 if (track->GetStop()==kFALSE){
c5a8e3df 591
b94f0a96 592 Double_t xtof=371.;
3c625a9b 593 Double_t c2=track->GetC()*xtof - track->GetEta();
c5a8e3df 594 if (TMath::Abs(c2)>=0.85) {
595 delete track;
596 continue;
597 }
b94f0a96 598 Double_t xTOF0 = 371. ;
16d9fbba 599 PropagateToOuterPlane(*track,xTOF0);
7bed16a7 600 //
3c625a9b 601 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
602 Double_t y=track->GetYat(xtof);
603 if (y > ymax) {
7ac6fa52 604 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
605 delete track;
7bed16a7 606 continue;
7ac6fa52 607 }
3c625a9b 608 } else if (y <-ymax) {
7ac6fa52 609 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
610 delete track;
7bed16a7 611 continue;
7ac6fa52 612 }
3c625a9b 613 }
614
615 if (track->PropagateTo(xtof)) {
616 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
c5a8e3df 617 seed->SetTRDtrack(new AliTRDtrack(*track));
3c625a9b 618 if (track->GetNumberOfClusters()>foundMin) found++;
619 }
620 }else{
621 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
622 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
16d9fbba 623 //seed->SetStatus(AliESDtrack::kTRDStop);
c5a8e3df 624 seed->SetTRDtrack(new AliTRDtrack(*track));
3c625a9b 625 found++;
626 }
1e9bb598 627 }
628
d9b8978b 629 delete track;
3c625a9b 630
1e9bb598 631 //End of propagation to the TOF
3c625a9b 632 //if (foundClr>foundMin)
633 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
634
c630aafd 635
636 }
637
638 cerr<<"Number of seeds: "<<fNseeds<<endl;
639 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
640
1e9bb598 641 fSeeds->Clear(); fNseeds=0;
642
643 return 0;
644
645}
646
647//_____________________________________________________________________________
648Int_t AliTRDtracker::RefitInward(AliESD* event)
649{
650 //
651 // Refits tracks within the TRD. The ESD event is expected to contain seeds
652 // at the outer part of the TRD.
653 // The tracks are propagated to the innermost time bin
654 // of the TRD and the ESD event is updated
655 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
656 //
657
658 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
659 Float_t foundMin = fgkMinClustersInTrack * timeBins;
660 Int_t nseed = 0;
661 Int_t found = 0;
662 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
663
664 Int_t n = event->GetNumberOfTracks();
665 for (Int_t i=0; i<n; i++) {
666 AliESDtrack* seed=event->GetTrack(i);
667 ULong_t status=seed->GetStatus();
668 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
46e2d86c 669 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
1e9bb598 670 nseed++;
671
672 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
3c625a9b 673 seed2->ResetCovariance(5.);
1e9bb598 674 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
46e2d86c 675 UInt_t * indexes2 = seed2->GetIndexes();
676 UInt_t * indexes3 = pt->GetBackupIndexes();
677 for (Int_t i=0;i<200;i++) {
678 if (indexes2[i]==0) break;
679 indexes3[i] = indexes2[i];
680 }
681 //AliTRDtrack *pt = seed2;
1e9bb598 682 AliTRDtrack &t=*pt;
683 FollowProlongation(t, innerTB);
7bed16a7 684 /*
46e2d86c 685 if (t.GetNumberOfClusters()<seed->GetTRDclusters(indexes3)*0.5){
686 // debug - why we dont go back?
687 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
688 UInt_t * indexes2 = seed2->GetIndexes();
689 UInt_t * indexes3 = pt2->GetBackupIndexes();
690 for (Int_t i=0;i<200;i++) {
691 if (indexes2[i]==0) break;
692 indexes3[i] = indexes2[i];
693 }
3c625a9b 694 FollowProlongation(*pt2, innerTB);
695 delete pt2;
46e2d86c 696 }
7bed16a7 697 */
1e9bb598 698 if (t.GetNumberOfClusters() >= foundMin) {
46e2d86c 699 // UseClusters(&t);
700 //CookLabel(pt, 1-fgkLabelFraction);
1e9bb598 701 // t.CookdEdx();
702 }
703 found++;
704// cout<<found<<'\r';
705
706 if(PropagateToTPC(t)) {
0fa7dfa7 707 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
7bed16a7 708 }else{
709 //if not prolongation to TPC - propagate without update
710 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
711 seed2->ResetCovariance(5.);
712 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
713 delete seed2;
714 if (PropagateToTPC(*pt2))
715 seed->UpdateTrackParams(pt2, AliESDtrack::kTRDrefit);
716 delete pt2;
1e9bb598 717 }
7bed16a7 718
1e9bb598 719 delete seed2;
720 delete pt;
721 }
722
723 cout<<"Number of loaded seeds: "<<nseed<<endl;
724 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
725
c630aafd 726 return 0;
727
728}
729
bbf92647 730
5443e65e 731//---------------------------------------------------------------------------
732Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
733{
734 // Starting from current position on track=t this function tries
735 // to extrapolate the track up to timeBin=0 and to confirm prolongation
736 // if a close cluster is found. Returns the number of clusters
737 // expected to be found in sensitive layers
bbf92647 738
5443e65e 739 Float_t wIndex, wTB, wChi2;
740 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
741 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
742 Float_t wPx, wPy, wPz, wC;
029cd327 743 Double_t px, py, pz;
5443e65e 744 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
3c625a9b 745 Int_t lastplane = GetLastPlane(&t);
46d29e70 746
5443e65e 747 Int_t trackIndex = t.GetLabel();
46d29e70 748
5443e65e 749 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
46d29e70 750
029cd327 751 Int_t tryAgain=fMaxGap;
46d29e70 752
5443e65e 753 Double_t alpha=t.GetAlpha();
c630aafd 754 alpha = TVector2::Phi_0_2pi(alpha);
46d29e70 755
5443e65e 756 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
029cd327 757 Double_t radLength, rho, x, dx, y, ymax, z;
46d29e70 758
5443e65e 759 Int_t expectedNumberOfClusters = 0;
760 Bool_t lookForCluster;
46d29e70 761
5443e65e 762 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 763
5443e65e 764
765 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
766
767 y = t.GetY(); z = t.GetZ();
768
769 // first propagate to the inner surface of the current time bin
029cd327 770 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 771 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
029cd327 772 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 773 y = t.GetY();
774 ymax = x*TMath::Tan(0.5*alpha);
775 if (y > ymax) {
776 s = (s+1) % ns;
777 if (!t.Rotate(alpha)) break;
029cd327 778 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 779 } else if (y <-ymax) {
780 s = (s-1+ns) % ns;
781 if (!t.Rotate(-alpha)) break;
029cd327 782 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 783 }
46d29e70 784
5443e65e 785 y = t.GetY(); z = t.GetZ();
786
787 // now propagate to the middle plane of the next time bin
029cd327 788 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 789 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 790 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 791 y = t.GetY();
792 ymax = x*TMath::Tan(0.5*alpha);
793 if (y > ymax) {
794 s = (s+1) % ns;
795 if (!t.Rotate(alpha)) break;
029cd327 796 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 797 } else if (y <-ymax) {
798 s = (s-1+ns) % ns;
799 if (!t.Rotate(-alpha)) break;
029cd327 800 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 801 }
46d29e70 802
46d29e70 803
5443e65e 804 if(lookForCluster) {
a819a5f7 805
5443e65e 806 expectedNumberOfClusters++;
5443e65e 807 wIndex = (Float_t) t.GetLabel();
808 wTB = nr;
46d29e70 809
029cd327 810 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
46d29e70 811
5443e65e 812 Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
5443e65e 813 Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
46d29e70 814
5443e65e 815 Double_t road;
816 if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
817 else return expectedNumberOfClusters;
818
819 wYrt = (Float_t) y;
820 wZrt = (Float_t) z;
821 wYwindow = (Float_t) road;
029cd327 822 t.GetPxPyPz(px,py,pz);
823 wPx = (Float_t) px;
824 wPy = (Float_t) py;
825 wPz = (Float_t) pz;
5443e65e 826 wC = (Float_t) t.GetC();
827 wSigmaC2 = (Float_t) t.GetSigmaC2();
828 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
829 wSigmaY2 = (Float_t) t.GetSigmaY2();
830 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
831 wChi2 = -1;
832
5443e65e 833
834 AliTRDcluster *cl=0;
835 UInt_t index=0;
836
029cd327 837 Double_t maxChi2=fgkMaxChi2;
5443e65e 838
839 wYclosest = 12345678;
840 wYcorrect = 12345678;
841 wZclosest = 12345678;
842 wZcorrect = 12345678;
843 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
844
845 // Find the closest correct cluster for debugging purposes
029cd327 846 if (timeBin) {
a9814c09 847 Float_t minDY = 1000000;
029cd327 848 for (Int_t i=0; i<timeBin; i++) {
849 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 850 if((c->GetLabel(0) != trackIndex) &&
851 (c->GetLabel(1) != trackIndex) &&
852 (c->GetLabel(2) != trackIndex)) continue;
853 if(TMath::Abs(c->GetY() - y) > minDY) continue;
854 minDY = TMath::Abs(c->GetY() - y);
855 wYcorrect = c->GetY();
856 wZcorrect = c->GetZ();
857
858 Double_t h01 = GetTiltFactor(c);
859 wChi2 = t.GetPredictedChi2(c, h01);
860 }
5443e65e 861 }
46d29e70 862
5443e65e 863 // Now go for the real cluster search
a819a5f7 864
029cd327 865 if (timeBin) {
46e2d86c 866 //
867 //find cluster in history
868 cl =0;
869
870 AliTRDcluster * cl0 = timeBin[0];
871 if (!cl0) {
872 continue;
873 }
874 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
3c625a9b 875 if (plane>lastplane) continue;
46e2d86c 876 Int_t timebin = cl0->GetLocalTimeBin();
877 AliTRDcluster * cl2= GetCluster(&t,plane, timebin);
3c625a9b 878 if (cl2) {
879 cl =cl2;
880 Double_t h01 = GetTiltFactor(cl);
881 maxChi2=t.GetPredictedChi2(cl,h01);
882 }
46e2d86c 883 if ((!cl) && road>fgkWideRoad) {
884 //if (t.GetNumberOfClusters()>4)
885 // cerr<<t.GetNumberOfClusters()
886 // <<"FindProlongation warning: Too broad road !\n";
887 continue;
888 }
889
890
891 if(!cl){
892
893 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
894 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
895 if (c->GetY() > y+road) break;
896 if (c->IsUsed() > 0) continue;
897 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
898
899 Double_t h01 = GetTiltFactor(c);
900 Double_t chi2=t.GetPredictedChi2(c,h01);
901
902 if (chi2 > maxChi2) continue;
903 maxChi2=chi2;
904 cl=c;
905 index=timeBin.GetIndex(i);
906 }
907 }
a9814c09 908
909 if(!cl) {
910
029cd327 911 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
912 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 913
914 if (c->GetY() > y+road) break;
915 if (c->IsUsed() > 0) continue;
916 if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
917
918 Double_t h01 = GetTiltFactor(c);
919 Double_t chi2=t.GetPredictedChi2(c, h01);
920
029cd327 921 if (chi2 > maxChi2) continue;
922 maxChi2=chi2;
a9814c09 923 cl=c;
029cd327 924 index=timeBin.GetIndex(i);
a9814c09 925 }
926 }
a9814c09 927 if (cl) {
928 wYclosest = cl->GetY();
929 wZclosest = cl->GetZ();
930 Double_t h01 = GetTiltFactor(cl);
931
932 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
46e2d86c 933 //printf("Track position\t%f\t%f\t%f\n",t.GetX(),t.GetY(),t.GetZ());
934 //printf("Cluster position\t%d\t%f\t%f\n",cl->GetLocalTimeBin(),cl->GetY(),cl->GetZ());
3c625a9b 935 Int_t det = cl->GetDetector();
936 Int_t plane = fGeom->GetPlane(det);
46e2d86c 937
3c625a9b 938 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
939 //if(!t.Update(cl,maxChi2,index,h01)) {
940 //if(!tryAgain--) return 0;
a9814c09 941 }
029cd327 942 else tryAgain=fMaxGap;
a9814c09 943 }
944 else {
3c625a9b 945 //if (tryAgain==0) break;
029cd327 946 tryAgain--;
a9814c09 947 }
948
949 /*
950 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
951
952 printf(" %f", wIndex); //1
953 printf(" %f", wTB); //2
954 printf(" %f", wYrt); //3
955 printf(" %f", wYclosest); //4
956 printf(" %f", wYcorrect); //5
957 printf(" %f", wYwindow); //6
958 printf(" %f", wZrt); //7
959 printf(" %f", wZclosest); //8
960 printf(" %f", wZcorrect); //9
961 printf(" %f", wZwindow); //10
962 printf(" %f", wPx); //11
963 printf(" %f", wPy); //12
964 printf(" %f", wPz); //13
965 printf(" %f", wSigmaC2*1000000); //14
966 printf(" %f", wSigmaTgl2*1000); //15
967 printf(" %f", wSigmaY2); //16
968 // printf(" %f", wSigmaZ2); //17
969 printf(" %f", wChi2); //17
970 printf(" %f", wC); //18
971 printf("\n");
972 }
973 */
5443e65e 974 }
975 }
976 }
977 return expectedNumberOfClusters;
978
979
980}
a819a5f7 981
5443e65e 982//___________________________________________________________________
46d29e70 983
5443e65e 984Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
985{
986 // Starting from current radial position of track <t> this function
987 // extrapolates the track up to outer timebin and in the sensitive
988 // layers confirms prolongation if a close cluster is found.
989 // Returns the number of clusters expected to be found in sensitive layers
46d29e70 990
16d9fbba 991
5443e65e 992 Float_t wIndex, wTB, wChi2;
993 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
994 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
995 Float_t wPx, wPy, wPz, wC;
029cd327 996 Double_t px, py, pz;
5443e65e 997 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
46d29e70 998
5443e65e 999 Int_t trackIndex = t.GetLabel();
029cd327 1000 Int_t tryAgain=fMaxGap;
46d29e70 1001
5443e65e 1002 Double_t alpha=t.GetAlpha();
9c9d2487 1003 TVector2::Phi_0_2pi(alpha);
46d29e70 1004
9c9d2487 1005 Int_t s;
46d29e70 1006
5443e65e 1007 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
029cd327 1008 Double_t radLength, rho, x, dx, y, ymax = 0, z;
5443e65e 1009 Bool_t lookForCluster;
a819a5f7 1010
5443e65e 1011 Int_t expectedNumberOfClusters = 0;
1012 x = t.GetX();
46d29e70 1013
5443e65e 1014 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1015
029cd327 1016 Int_t nRefPlane = fgkFirstPlane;
9c9d2487 1017 Bool_t isNewLayer = kFALSE;
46d29e70 1018
9c9d2487 1019 Double_t chi2;
1020 Double_t minDY;
3c625a9b 1021 Int_t zone =-10;
1022 Int_t nr;
1023 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
9c9d2487 1024
1025 y = t.GetY();
1026 z = t.GetZ();
46d29e70 1027
5443e65e 1028 // first propagate to the outer surface of the current time bin
46d29e70 1029
9c9d2487 1030 s = t.GetSector();
029cd327 1031 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1032 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2;
1033 y = t.GetY();
1034 z = t.GetZ();
46d29e70 1035
029cd327 1036 if(!t.PropagateTo(x,radLength,rho)) break;
3c625a9b 1037 // if (!AdjustSector(&t)) break;
1038 //
1039 // MI -fix untill correct material desription will be implemented
1040 //
16d9fbba 1041 Float_t angle = t.GetAlpha(); // MI - if rotation - we go through the material
9c9d2487 1042 if (!AdjustSector(&t)) break;
16d9fbba 1043 Int_t cross = kFALSE;
1044
1045 if (TMath::Abs(angle - t.GetAlpha())>0.000001) cross = kTRUE; //better to stop track
3c625a9b 1046 Int_t currentzone = fTrSec[s]->GetLayer(nr)->GetZone(z);
16d9fbba 1047 if (currentzone==-10) cross = kTRUE; // we are in the frame
3c625a9b 1048 if (currentzone>-10){ // layer knows where we are
1049 if (zone==-10) zone = currentzone;
16d9fbba 1050 if (zone!=currentzone) cross=kTRUE;
1051 }
1052 if (cross) {
1053 t.IncCross();
1054 if (t.GetNCross()==1) t.MakeBackupTrack();
1055 if (t.GetNCross()>2) break;
3c625a9b 1056 }
16d9fbba 1057
3c625a9b 1058 //
1059 //
9c9d2487 1060 s = t.GetSector();
029cd327 1061 if (!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1062
5443e65e 1063 y = t.GetY();
9c9d2487 1064 z = t.GetZ();
a819a5f7 1065
9c9d2487 1066 // Barrel Tracks [SR, 04.04.2003]
46d29e70 1067
9c9d2487 1068 s = t.GetSector();
1069 if (fTrSec[s]->GetLayer(nr)->IsSensitive() !=
1070 fTrSec[s]->GetLayer(nr+1)->IsSensitive() ) {
46d29e70 1071
c630aafd 1072// if (IsStoringBarrel()) StoreBarrelTrack(&t, nRefPlane++, kTrackBack);
9c9d2487 1073 }
46d29e70 1074
9c9d2487 1075 if (fTrSec[s]->GetLayer(nr-1)->IsSensitive() &&
1076 ! fTrSec[s]->GetLayer(nr)->IsSensitive()) {
1077 isNewLayer = kTRUE;
1078 } else {isNewLayer = kFALSE;}
46d29e70 1079
5443e65e 1080 y = t.GetY();
9c9d2487 1081 z = t.GetZ();
a819a5f7 1082
9c9d2487 1083 // now propagate to the middle plane of the next time bin
029cd327 1084 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1085
9c9d2487 1086 x = fTrSec[s]->GetLayer(nr+1)->GetX();
029cd327 1087 if(!t.PropagateTo(x,radLength,rho)) break;
9c9d2487 1088 if (!AdjustSector(&t)) break;
1089 s = t.GetSector();
029cd327 1090 if(!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1091
9c9d2487 1092 y = t.GetY();
1093 z = t.GetZ();
1094
1095 if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
5443e65e 1096 // printf("label %d, pl %d, lookForCluster %d \n",
a9814c09 1097 // trackIndex, nr+1, lookForCluster);
5443e65e 1098
1099 if(lookForCluster) {
1100 expectedNumberOfClusters++;
1101
1102 wIndex = (Float_t) t.GetLabel();
1103 wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
1104
029cd327 1105 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
5443e65e 1106 Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
1107 Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
1108 if((t.GetSigmaY2() + sy2) < 0) break;
1109 Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
1110 Double_t y=t.GetY(), z=t.GetZ();
1111
1112 wYrt = (Float_t) y;
1113 wZrt = (Float_t) z;
1114 wYwindow = (Float_t) road;
029cd327 1115 t.GetPxPyPz(px,py,pz);
1116 wPx = (Float_t) px;
1117 wPy = (Float_t) py;
1118 wPz = (Float_t) pz;
5443e65e 1119 wC = (Float_t) t.GetC();
1120 wSigmaC2 = (Float_t) t.GetSigmaC2();
1121 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1122 wSigmaY2 = (Float_t) t.GetSigmaY2();
1123 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1124 wChi2 = -1;
1125
029cd327 1126 if (road>fgkWideRoad) {
a9814c09 1127 if (t.GetNumberOfClusters()>4)
1128 cerr<<t.GetNumberOfClusters()
1129 <<"FindProlongation warning: Too broad road !\n";
1130 return 0;
5443e65e 1131 }
1132
1133 AliTRDcluster *cl=0;
1134 UInt_t index=0;
1135
029cd327 1136 Double_t maxChi2=fgkMaxChi2;
5443e65e 1137
9c9d2487 1138 if (isNewLayer) {
1139 road = 3 * road;
1140 //sz2 = 3 * sz2;
029cd327 1141 maxChi2 = 10 * fgkMaxChi2;
9c9d2487 1142 }
1143
029cd327 1144 if (nRefPlane == fgkFirstPlane) maxChi2 = 20 * fgkMaxChi2;
1145 if (nRefPlane == fgkFirstPlane+2) maxChi2 = 15 * fgkMaxChi2;
1146 if (t.GetNRotate() > 0) maxChi2 = 3 * maxChi2;
9c9d2487 1147
1148
5443e65e 1149 wYclosest = 12345678;
1150 wYcorrect = 12345678;
1151 wZclosest = 12345678;
1152 wZcorrect = 12345678;
1153 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1154
1155 // Find the closest correct cluster for debugging purposes
029cd327 1156 if (timeBin) {
9c9d2487 1157 minDY = 1000000;
029cd327 1158 for (Int_t i=0; i<timeBin; i++) {
1159 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1160 if((c->GetLabel(0) != trackIndex) &&
1161 (c->GetLabel(1) != trackIndex) &&
1162 (c->GetLabel(2) != trackIndex)) continue;
1163 if(TMath::Abs(c->GetY() - y) > minDY) continue;
9c9d2487 1164 //minDY = TMath::Abs(c->GetY() - y);
1165 minDY = c->GetY() - y;
a9814c09 1166 wYcorrect = c->GetY();
1167 wZcorrect = c->GetZ();
1168
1169 Double_t h01 = GetTiltFactor(c);
1170 wChi2 = t.GetPredictedChi2(c, h01);
1171 }
5443e65e 1172 }
46d29e70 1173
5443e65e 1174 // Now go for the real cluster search
46d29e70 1175
029cd327 1176 if (timeBin) {
5443e65e 1177
029cd327 1178 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1179 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1180 if (c->GetY() > y+road) break;
9c9d2487 1181 if (c->IsUsed() > 0) continue;
a9814c09 1182 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1183
1184 Double_t h01 = GetTiltFactor(c);
9c9d2487 1185 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1186
029cd327 1187 if (chi2 > maxChi2) continue;
1188 maxChi2=chi2;
a9814c09 1189 cl=c;
029cd327 1190 index=timeBin.GetIndex(i);
9c9d2487 1191
1192 //check is correct
1193 if((c->GetLabel(0) != trackIndex) &&
1194 (c->GetLabel(1) != trackIndex) &&
1195 (c->GetLabel(2) != trackIndex)) t.AddNWrong();
a9814c09 1196 }
5443e65e 1197
a9814c09 1198 if(!cl) {
1199
029cd327 1200 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1201 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1202
1203 if (c->GetY() > y+road) break;
9c9d2487 1204 if (c->IsUsed() > 0) continue;
a9814c09 1205 if((c->GetZ()-z)*(c->GetZ()-z) > 2.25 * 12 * sz2) continue;
1206
1207 Double_t h01 = GetTiltFactor(c);
9c9d2487 1208 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1209
029cd327 1210 if (chi2 > maxChi2) continue;
1211 maxChi2=chi2;
a9814c09 1212 cl=c;
029cd327 1213 index=timeBin.GetIndex(i);
a9814c09 1214 }
1215 }
1216
1217 if (cl) {
1218 wYclosest = cl->GetY();
1219 wZclosest = cl->GetZ();
1220
1221 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1222 Double_t h01 = GetTiltFactor(cl);
3c625a9b 1223 Int_t det = cl->GetDetector();
1224 Int_t plane = fGeom->GetPlane(det);
1225
1226 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1227 //if(!t.Update(cl,maxChi2,index,h01)) {
029cd327 1228 if(!tryAgain--) return 0;
a9814c09 1229 }
029cd327 1230 else tryAgain=fMaxGap;
a9814c09 1231 }
1232 else {
029cd327 1233 if (tryAgain==0) break;
1234 tryAgain--;
9c9d2487 1235
1236 //if (minDY < 1000000 && isNewLayer)
1237 //cout << "\t" << nRefPlane << "\t" << "\t" << t.GetNRotate() << "\t" <<
029cd327 1238 // road << "\t" << minDY << "\t" << chi2 << "\t" << wChi2 << "\t" << maxChi2 << endl;
9c9d2487 1239
a9814c09 1240 }
1241
9c9d2487 1242 isNewLayer = kFALSE;
1243
a9814c09 1244 /*
1245 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1246
1247 printf(" %f", wIndex); //1
1248 printf(" %f", wTB); //2
1249 printf(" %f", wYrt); //3
1250 printf(" %f", wYclosest); //4
1251 printf(" %f", wYcorrect); //5
1252 printf(" %f", wYwindow); //6
1253 printf(" %f", wZrt); //7
1254 printf(" %f", wZclosest); //8
1255 printf(" %f", wZcorrect); //9
1256 printf(" %f", wZwindow); //10
1257 printf(" %f", wPx); //11
1258 printf(" %f", wPy); //12
1259 printf(" %f", wPz); //13
1260 printf(" %f", wSigmaC2*1000000); //14
1261 printf(" %f", wSigmaTgl2*1000); //15
1262 printf(" %f", wSigmaY2); //16
1263 // printf(" %f", wSigmaZ2); //17
1264 printf(" %f", wChi2); //17
1265 printf(" %f", wC); //18
1266 printf("\n");
1267 }
1268 */
5443e65e 1269 }
1270 }
1271 }
3c625a9b 1272 if (nr<outerTB)
1273 t.SetStop(kTRUE);
1274 else
1275 t.SetStop(kFALSE);
5443e65e 1276 return expectedNumberOfClusters;
9c9d2487 1277
1278
5443e65e 1279}
1280
1e9bb598 1281//---------------------------------------------------------------------------
1282Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
1283{
1284 // Starting from current position on track=t this function tries
1285 // to extrapolate the track up to timeBin=0 and to reuse already
1286 // assigned clusters. Returns the number of clusters
1287 // expected to be found in sensitive layers
1288 // get indices of assigned clusters for each layer
1289 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1290
1291 Int_t iCluster[90];
1292 for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
1293 for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
1294 Int_t index = t.GetClusterIndex(i);
1295 AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
1296 if (!cl) continue;
1297 Int_t detector=cl->GetDetector();
1298 Int_t localTimeBin=cl->GetLocalTimeBin();
1299 Int_t sector=fGeom->GetSector(detector);
1300 Int_t plane=fGeom->GetPlane(detector);
1301
1302 Int_t trackingSector = CookSectorIndex(sector);
1303
1304 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1305 if(gtb < 0) continue;
1306 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1307 iCluster[layer] = index;
1308 }
1309 t.ResetClusters();
1310
1311 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1312
1313 Double_t alpha=t.GetAlpha();
1314 alpha = TVector2::Phi_0_2pi(alpha);
1315
1316 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1317 Double_t radLength, rho, x, dx, y, ymax, z;
1318
1319 Int_t expectedNumberOfClusters = 0;
1320 Bool_t lookForCluster;
1321
1322 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1323
1324
1325 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1326
1327 y = t.GetY(); z = t.GetZ();
1328
1329 // first propagate to the inner surface of the current time bin
1330 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1331 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1332 if(!t.PropagateTo(x,radLength,rho)) break;
1333 y = t.GetY();
1334 ymax = x*TMath::Tan(0.5*alpha);
1335 if (y > ymax) {
1336 s = (s+1) % ns;
1337 if (!t.Rotate(alpha)) break;
1338 if(!t.PropagateTo(x,radLength,rho)) break;
1339 } else if (y <-ymax) {
1340 s = (s-1+ns) % ns;
1341 if (!t.Rotate(-alpha)) break;
1342 if(!t.PropagateTo(x,radLength,rho)) break;
1343 }
1344
1345 y = t.GetY(); z = t.GetZ();
1346
1347 // now propagate to the middle plane of the next time bin
1348 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1349 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1350 if(!t.PropagateTo(x,radLength,rho)) break;
1351 y = t.GetY();
1352 ymax = x*TMath::Tan(0.5*alpha);
1353 if (y > ymax) {
1354 s = (s+1) % ns;
1355 if (!t.Rotate(alpha)) break;
1356 if(!t.PropagateTo(x,radLength,rho)) break;
1357 } else if (y <-ymax) {
1358 s = (s-1+ns) % ns;
1359 if (!t.Rotate(-alpha)) break;
1360 if(!t.PropagateTo(x,radLength,rho)) break;
1361 }
1362
1363 if(lookForCluster) expectedNumberOfClusters++;
1364
1365 // use assigned cluster
1366 if (!iCluster[nr-1]) continue;
1367 AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
1368 Double_t h01 = GetTiltFactor(cl);
1369 Double_t chi2=t.GetPredictedChi2(cl, h01);
1370 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1371 t.Update(cl,chi2,iCluster[nr-1],h01);
1372 }
1373
1374 return expectedNumberOfClusters;
1375}
1376
5443e65e 1377//___________________________________________________________________
1378
1379Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
1380{
1381 // Starting from current radial position of track <t> this function
1382 // extrapolates the track up to radial position <xToGo>.
1383 // Returns 1 if track reaches the plane, and 0 otherwise
1384
1385 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1386
1387 Double_t alpha=t.GetAlpha();
1388
1389 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1390 if (alpha < 0. ) alpha += 2.*TMath::Pi();
1391
1392 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1393
1394 Bool_t lookForCluster;
029cd327 1395 Double_t radLength, rho, x, dx, y, ymax, z;
5443e65e 1396
1397 x = t.GetX();
1398
1399 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1400
1401 Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
1402
1403 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
1404
1405 y = t.GetY(); z = t.GetZ();
1406
1407 // first propagate to the outer surface of the current time bin
029cd327 1408 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1409 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1410 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1411 y = t.GetY();
1412 ymax = x*TMath::Tan(0.5*alpha);
1413 if (y > ymax) {
1414 s = (s+1) % ns;
1415 if (!t.Rotate(alpha)) return 0;
1416 } else if (y <-ymax) {
1417 s = (s-1+ns) % ns;
1418 if (!t.Rotate(-alpha)) return 0;
1419 }
029cd327 1420 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1421
1422 y = t.GetY(); z = t.GetZ();
1423
1424 // now propagate to the middle plane of the next time bin
029cd327 1425 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1426 x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1427 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1428 y = t.GetY();
1429 ymax = x*TMath::Tan(0.5*alpha);
1430 if (y > ymax) {
1431 s = (s+1) % ns;
1432 if (!t.Rotate(alpha)) return 0;
1433 } else if (y <-ymax) {
1434 s = (s-1+ns) % ns;
1435 if (!t.Rotate(-alpha)) return 0;
1436 }
029cd327 1437 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1438 }
1439 return 1;
1440}
1441
1442//___________________________________________________________________
1443
1444Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
1445{
1446 // Starting from current radial position of track <t> this function
1447 // extrapolates the track up to radial position of the outermost
1448 // padrow of the TPC.
1449 // Returns 1 if track reaches the TPC, and 0 otherwise
1450
c630aafd 1451 //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
5443e65e 1452
1453 Double_t alpha=t.GetAlpha();
c630aafd 1454 alpha = TVector2::Phi_0_2pi(alpha);
5443e65e 1455
1456 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1457
1458 Bool_t lookForCluster;
029cd327 1459 Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
5443e65e 1460
1461 x = t.GetX();
1462
1463 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
5443e65e 1464 Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
1465
1466 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
1467
9c9d2487 1468 y = t.GetY();
1469 z = t.GetZ();
5443e65e 1470
1471 // first propagate to the outer surface of the current time bin
029cd327 1472 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1473 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
1474
029cd327 1475 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1476 AdjustSector(&t);
029cd327 1477 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1478
9c9d2487 1479 y = t.GetY();
1480 z = t.GetZ();
5443e65e 1481
1482 // now propagate to the middle plane of the next time bin
029cd327 1483 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1484 x = fTrSec[s]->GetLayer(nr-1)->GetX();
1485
029cd327 1486 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1487 AdjustSector(&t);
029cd327 1488 if(!t.PropagateTo(x,radLength,rho)) return 0;
c5a8e3df 1489 }
5443e65e 1490 return 1;
1491}
1492
c630aafd 1493//_____________________________________________________________________________
1494Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1495{
1496 // Fills clusters into TRD tracking_sectors
1497 // Note that the numbering scheme for the TRD tracking_sectors
1498 // differs from that of TRD sectors
1499
1500 if (ReadClusters(fClusters,cTree)) {
1501 Error("LoadClusters","Problem with reading the clusters !");
1502 return 1;
1503 }
1504 Int_t ncl=fClusters->GetEntriesFast();
b7a0917f 1505 fNclusters=ncl;
c630aafd 1506 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1507
1508 UInt_t index;
3c625a9b 1509 for (Int_t ichamber=0;ichamber<5;ichamber++)
1510 for (Int_t isector=0;isector<18;isector++){
1511 fHoles[ichamber][isector]=kTRUE;
1512 }
1513
1514
c630aafd 1515 while (ncl--) {
1516// printf("\r %d left ",ncl);
1517 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1518 Int_t detector=c->GetDetector();
1519 Int_t localTimeBin=c->GetLocalTimeBin();
c630aafd 1520 Int_t sector=fGeom->GetSector(detector);
1521 Int_t plane=fGeom->GetPlane(detector);
3c625a9b 1522
029cd327 1523 Int_t trackingSector = CookSectorIndex(sector);
3c625a9b 1524 if (c->GetLabel(0)>0){
1525 Int_t chamber = fGeom->GetChamber(detector);
1526 fHoles[chamber][trackingSector]=kFALSE;
1527 }
c630aafd 1528
029cd327 1529 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
c630aafd 1530 if(gtb < 0) continue;
029cd327 1531 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
c630aafd 1532
1533 index=ncl;
029cd327 1534 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
c630aafd 1535 }
7bed16a7 1536 // printf("\r\n");
3c625a9b 1537 //
1538 //
1539 /*
1540 for (Int_t isector=0;isector<18;isector++){
1541 for (Int_t ichamber=0;ichamber<5;ichamber++)
1542 if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
1543 printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
1544 fGeom->IsHole(0,ichamber,17-isector));
1545 }
1546 */
c630aafd 1547 return 0;
1548}
1549
5443e65e 1550//_____________________________________________________________________________
b7a0917f 1551void AliTRDtracker::UnloadClusters()
5443e65e 1552{
1553 //
1554 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1555 //
1556
1557 Int_t i, nentr;
1558
1559 nentr = fClusters->GetEntriesFast();
1560 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
b7a0917f 1561 fNclusters = 0;
5443e65e 1562
1563 nentr = fSeeds->GetEntriesFast();
1564 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1565
1566 nentr = fTracks->GetEntriesFast();
1567 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1568
1569 Int_t nsec = AliTRDgeometry::kNsect;
1570
1571 for (i = 0; i < nsec; i++) {
1572 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1573 fTrSec[i]->GetLayer(pl)->Clear();
1574 }
1575 }
1576
1577}
1578
1579//__________________________________________________________________________
1580void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
1581{
1582 // Creates track seeds using clusters in timeBins=i1,i2
1583
1584 if(turn > 2) {
1585 cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
1586 return;
1587 }
1588
1589 Double_t x[5], c[15];
029cd327 1590 Int_t maxSec=AliTRDgeometry::kNsect;
5443e65e 1591
1592 Double_t alpha=AliTRDgeometry::GetAlpha();
1593 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
1594 Double_t cs=cos(alpha), sn=sin(alpha);
1595 Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
1596
1597
1598 Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
1599 Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
1600
1601 Double_t x1 =fTrSec[0]->GetX(i1);
1602 Double_t xx2=fTrSec[0]->GetX(i2);
1603
029cd327 1604 for (Int_t ns=0; ns<maxSec; ns++) {
5443e65e 1605
029cd327 1606 Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1607 Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
5443e65e 1608 Int_t nm=(*fTrSec[ns]->GetLayer(i2));
029cd327 1609 Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1610 Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
5443e65e 1611
1612 AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
1613
1614 for (Int_t is=0; is < r1; is++) {
1615 Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
1616
1617 for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
a9814c09 1618
1619 const AliTRDcluster *cl;
1620 Double_t x2, y2, z2;
1621 Double_t x3=0., y3=0.;
1622
1623 if (js<nl2) {
1624 if(turn != 2) continue;
029cd327 1625 AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1626 cl=r2[js];
1627 y2=cl->GetY(); z2=cl->GetZ();
1628
1629 x2= xx2*cs2+y2*sn2;
1630 y2=-xx2*sn2+y2*cs2;
1631 }
1632 else if (js<nl2+nl) {
1633 if(turn != 1) continue;
029cd327 1634 AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1635 cl=r2[js-nl2];
1636 y2=cl->GetY(); z2=cl->GetZ();
1637
1638 x2= xx2*cs+y2*sn;
1639 y2=-xx2*sn+y2*cs;
1640 }
1641 else if (js<nl2+nl+nm) {
1642 if(turn != 1) continue;
1643 AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
1644 cl=r2[js-nl2-nl];
1645 x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
1646 }
1647 else if (js<nl2+nl+nm+nu) {
1648 if(turn != 1) continue;
029cd327 1649 AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
a9814c09 1650 cl=r2[js-nl2-nl-nm];
1651 y2=cl->GetY(); z2=cl->GetZ();
1652
1653 x2=xx2*cs-y2*sn;
1654 y2=xx2*sn+y2*cs;
1655 }
1656 else {
1657 if(turn != 2) continue;
029cd327 1658 AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
a9814c09 1659 cl=r2[js-nl2-nl-nm-nu];
1660 y2=cl->GetY(); z2=cl->GetZ();
1661
1662 x2=xx2*cs2-y2*sn2;
1663 y2=xx2*sn2+y2*cs2;
1664 }
1665
029cd327 1666 if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
a9814c09 1667
1668 Double_t zz=z1 - z1/x1*(x1-x2);
1669
029cd327 1670 if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
a9814c09 1671
1672 Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
1673 if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
1674
1675 x[0]=y1;
1676 x[1]=z1;
1677 x[4]=f1trd(x1,y1,x2,y2,x3,y3);
1678
029cd327 1679 if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
a9814c09 1680
1681 x[2]=f2trd(x1,y1,x2,y2,x3,y3);
1682
1683 if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
1684
1685 x[3]=f3trd(x1,y1,x2,y2,z1,z2);
1686
029cd327 1687 if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
a9814c09 1688
1689 Double_t a=asin(x[2]);
1690 Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
1691
029cd327 1692 if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
a9814c09 1693
1694 Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
1695 Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
029cd327 1696 Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
a9814c09 1697
1698 // Tilt changes
1699 Double_t h01 = GetTiltFactor(r1[is]);
029cd327 1700 Double_t xuFactor = 100.;
b8dc2353 1701 if(fNoTilt) {
1702 h01 = 0;
029cd327 1703 xuFactor = 1;
b8dc2353 1704 }
1705
fd621f36 1706 sy1=sy1+sz1*h01*h01;
b3a5a838 1707 Double_t syz=sz1*(-h01);
a9814c09 1708 // end of tilt changes
1709
b3a5a838 1710 Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
1711 Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
1712 Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
1713 Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
1714 Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
1715 Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
1716 Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
1717 Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
1718 Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
1719 Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
1720
a9814c09 1721
b3a5a838 1722 c[0]=sy1;
a9814c09 1723 // c[1]=0.; c[2]=sz1;
029cd327 1724 c[1]=syz; c[2]=sz1*xuFactor;
b3a5a838 1725 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
1726 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
1727 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
1728 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
1729 c[13]=f30*sy1*f40+f32*sy2*f42;
1730 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
a9814c09 1731
1732 UInt_t index=r1.GetIndex(is);
1733
1734 AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
1735
1736 Int_t rc=FollowProlongation(*track, i2);
1737
1738 if ((rc < 1) ||
1739 (track->GetNumberOfClusters() <
029cd327 1740 (outer-inner)*fgkMinClustersInSeed)) delete track;
a9814c09 1741 else {
1742 fSeeds->AddLast(track); fNseeds++;
e24ea474 1743// cerr<<"\r found seed "<<fNseeds;
a9814c09 1744 }
5443e65e 1745 }
1746 }
1747 }
1748}
1749
1750//_____________________________________________________________________________
b7a0917f 1751Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree) const
5443e65e 1752{
1753 //
a819a5f7 1754 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
1755 // from the file. The names of the cluster tree and branches
1756 // should match the ones used in AliTRDclusterizer::WriteClusters()
1757 //
029cd327 1758 TObjArray *clusterArray = new TObjArray(400);
5443e65e 1759
c630aafd 1760 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
1761 if (!branch) {
1762 Error("ReadClusters","Can't get the branch !");
1763 return 1;
1764 }
029cd327 1765 branch->SetAddress(&clusterArray);
5443e65e 1766
1767 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
19dd5b2f 1768 // printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
a819a5f7 1769
a819a5f7 1770 // Loop through all entries in the tree
eb187bed 1771 Int_t nbytes = 0;
a819a5f7 1772 AliTRDcluster *c = 0;
7bed16a7 1773 // printf("\n");
a819a5f7 1774
1775 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
1776
1777 // Import the tree
5443e65e 1778 nbytes += ClusterTree->GetEvent(iEntry);
1779
a819a5f7 1780 // Get the number of points in the detector
029cd327 1781 Int_t nCluster = clusterArray->GetEntriesFast();
e24ea474 1782// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 1783
a819a5f7 1784 // Loop through all TRD digits
1785 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 1786 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
a819a5f7 1787 AliTRDcluster *co = new AliTRDcluster(*c);
1788 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
5443e65e 1789 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 1790 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
1791 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
a819a5f7 1792 array->AddLast(co);
029cd327 1793 delete clusterArray->RemoveAt(iCluster);
a819a5f7 1794 }
1795 }
1796
029cd327 1797 delete clusterArray;
5443e65e 1798
c630aafd 1799 return 0;
a819a5f7 1800}
1801
46d29e70 1802//__________________________________________________________________
029cd327 1803void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
1804{
1805 //
1806 // This cooks a label. Mmmmh, smells good...
1807 //
46d29e70 1808
1809 Int_t label=123456789, index, i, j;
5443e65e 1810 Int_t ncl=pt->GetNumberOfClusters();
029cd327 1811 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
5443e65e 1812
029cd327 1813 Bool_t labelAdded;
46d29e70 1814
029cd327 1815 // Int_t s[kRange][2];
1816 Int_t **s = new Int_t* [kRange];
1817 for (i=0; i<kRange; i++) {
d1b06c24 1818 s[i] = new Int_t[2];
1819 }
029cd327 1820 for (i=0; i<kRange; i++) {
46d29e70 1821 s[i][0]=-1;
1822 s[i][1]=0;
1823 }
1824
1825 Int_t t0,t1,t2;
1826 for (i=0; i<ncl; i++) {
5443e65e 1827 index=pt->GetClusterIndex(i);
46d29e70 1828 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
5443e65e 1829 t0=c->GetLabel(0);
1830 t1=c->GetLabel(1);
1831 t2=c->GetLabel(2);
46d29e70 1832 }
1833
1834 for (i=0; i<ncl; i++) {
5443e65e 1835 index=pt->GetClusterIndex(i);
46d29e70 1836 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
1837 for (Int_t k=0; k<3; k++) {
5443e65e 1838 label=c->GetLabel(k);
029cd327 1839 labelAdded=kFALSE; j=0;
46d29e70 1840 if (label >= 0) {
029cd327 1841 while ( (!labelAdded) && ( j < kRange ) ) {
a9814c09 1842 if (s[j][0]==label || s[j][1]==0) {
1843 s[j][0]=label;
1844 s[j][1]=s[j][1]+1;
029cd327 1845 labelAdded=kTRUE;
a9814c09 1846 }
1847 j++;
1848 }
46d29e70 1849 }
1850 }
1851 }
1852
46d29e70 1853 Int_t max=0;
1854 label = -123456789;
1855
029cd327 1856 for (i=0; i<kRange; i++) {
46d29e70 1857 if (s[i][1]>max) {
1858 max=s[i][1]; label=s[i][0];
1859 }
1860 }
5443e65e 1861
029cd327 1862 for (i=0; i<kRange; i++) {
5443e65e 1863 delete []s[i];
1864 }
1865
d1b06c24 1866 delete []s;
5443e65e 1867
1868 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
1869
1870 pt->SetLabel(label);
1871
46d29e70 1872}
1873
c630aafd 1874
5443e65e 1875//__________________________________________________________________
029cd327 1876void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
1877{
1878 //
1879 // Use clusters, but don't abuse them!
1880 //
1881
5443e65e 1882 Int_t ncl=t->GetNumberOfClusters();
1883 for (Int_t i=from; i<ncl; i++) {
1884 Int_t index = t->GetClusterIndex(i);
1885 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
1886 c->Use();
1887 }
1888}
1889
1890
1891//_____________________________________________________________________
029cd327 1892Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
5443e65e 1893{
1894 // Parametrised "expected" error of the cluster reconstruction in Y
1895
1896 Double_t s = 0.08 * 0.08;
1897 return s;
1898}
1899
1900//_____________________________________________________________________
029cd327 1901Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
0a29d0f1 1902{
5443e65e 1903 // Parametrised "expected" error of the cluster reconstruction in Z
1904
a9814c09 1905 Double_t s = 9 * 9 /12.;
5443e65e 1906 return s;
1907}
1908
5443e65e 1909//_____________________________________________________________________
029cd327 1910Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
5443e65e 1911{
1912 //
029cd327 1913 // Returns radial position which corresponds to time bin <localTB>
5443e65e 1914 // in tracking sector <sector> and plane <plane>
1915 //
1916
029cd327 1917 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
5443e65e 1918 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
1919 return fTrSec[sector]->GetLayer(pl)->GetX();
1920
1921}
1922
c630aafd 1923
5443e65e 1924//_______________________________________________________
1925AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
029cd327 1926 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
5443e65e 1927{
0a29d0f1 1928 //
5443e65e 1929 // AliTRDpropagationLayer constructor
0a29d0f1 1930 //
46d29e70 1931
029cd327 1932 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
1933 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
5443e65e 1934
46d29e70 1935
029cd327 1936 for(Int_t i=0; i < (Int_t) kZones; i++) {
5443e65e 1937 fZc[i]=0; fZmax[i] = 0;
a819a5f7 1938 }
5443e65e 1939
1940 fYmax = 0;
1941
1942 if(fTimeBinIndex >= 0) {
029cd327 1943 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
1944 fIndex = new UInt_t[kMaxClusterPerTimeBin];
a819a5f7 1945 }
46d29e70 1946
3c625a9b 1947 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
5443e65e 1948 fHole = kFALSE;
1949 fHoleZc = 0;
1950 fHoleZmax = 0;
1951 fHoleYc = 0;
1952 fHoleYmax = 0;
1953 fHoleRho = 0;
1954 fHoleX0 = 0;
1955
1956}
1957
1958//_______________________________________________________
1959void AliTRDtracker::AliTRDpropagationLayer::SetHole(
a9814c09 1960 Double_t Zmax, Double_t Ymax, Double_t rho,
029cd327 1961 Double_t radLength, Double_t Yc, Double_t Zc)
5443e65e 1962{
1963 //
1964 // Sets hole in the layer
1965 //
5443e65e 1966 fHole = kTRUE;
1967 fHoleZc = Zc;
1968 fHoleZmax = Zmax;
1969 fHoleYc = Yc;
1970 fHoleYmax = Ymax;
1971 fHoleRho = rho;
029cd327 1972 fHoleX0 = radLength;
5443e65e 1973}
1974
46d29e70 1975
5443e65e 1976//_______________________________________________________
1977AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
1978{
1979 //
1980 // AliTRDtrackingSector Constructor
1981 //
1982
1983 fGeom = geo;
1984 fPar = par;
1985 fGeomSector = gs;
1986 fTzeroShift = 0.13;
1987 fN = 0;
3c625a9b 1988 //
1989 // get holes description from geometry
1990 Bool_t holes[AliTRDgeometry::kNcham];
1991 //printf("sector\t%d\t",gs);
1992 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
1993 holes[icham] = fGeom->IsHole(0,icham,gs);
1994 //printf("%d",holes[icham]);
1995 }
1996 //printf("\n");
1997
029cd327 1998 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
5443e65e 1999
2000
2001 AliTRDpropagationLayer* ppl;
2002
029cd327 2003 Double_t x, xin, xout, dx, rho, radLength;
5443e65e 2004 Int_t steps;
46d29e70 2005
5443e65e 2006 // set time bins in the gas of the TPC
46d29e70 2007
5443e65e 2008 xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
029cd327 2009 rho = 0.9e-3; radLength = 28.94;
5443e65e 2010
2011 for(Int_t i=0; i<steps; i++) {
2012 x = xin + i*dx + dx/2;
029cd327 2013 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2014 InsertLayer(ppl);
46d29e70 2015 }
2016
5443e65e 2017 // set time bins in the outer field cage vessel
46d29e70 2018
029cd327 2019 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2020 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2021 InsertLayer(ppl);
46d29e70 2022
029cd327 2023 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2024 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2025 InsertLayer(ppl);
2026
029cd327 2027 dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2028 steps = 5; dx = (xout - xin)/steps;
2029 for(Int_t i=0; i<steps; i++) {
2030 x = xin + i*dx + dx/2;
029cd327 2031 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2032 InsertLayer(ppl);
2033 }
2034
029cd327 2035 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2036 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2037 InsertLayer(ppl);
2038
029cd327 2039 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2040 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2041 InsertLayer(ppl);
0a29d0f1 2042
5443e65e 2043
2044 // set time bins in CO2
2045
2046 xin = xout; xout = 275.0;
2047 steps = 50; dx = (xout - xin)/steps;
029cd327 2048 rho = 1.977e-3; radLength = 36.2;
5443e65e 2049
2050 for(Int_t i=0; i<steps; i++) {
2051 x = xin + i*dx + dx/2;
029cd327 2052 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2053 InsertLayer(ppl);
2054 }
2055
2056 // set time bins in the outer containment vessel
2057
029cd327 2058 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2059 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2060 InsertLayer(ppl);
2061
029cd327 2062 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2063 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2064 InsertLayer(ppl);
2065
029cd327 2066 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2067 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2068 InsertLayer(ppl);
2069
029cd327 2070 dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2071 steps = 10; dx = (xout - xin)/steps;
2072 for(Int_t i=0; i<steps; i++) {
2073 x = xin + i*dx + dx/2;
029cd327 2074 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2075 InsertLayer(ppl);
2076 }
2077
029cd327 2078 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2079 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2080 InsertLayer(ppl);
2081
029cd327 2082 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2083 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2084 InsertLayer(ppl);
2085
029cd327 2086 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2087 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2088 InsertLayer(ppl);
2089
2090 Double_t xtrd = (Double_t) fGeom->Rmin();
2091
2092 // add layers between TPC and TRD (Air temporarily)
2093 xin = xout; xout = xtrd;
2094 steps = 50; dx = (xout - xin)/steps;
029cd327 2095 rho = 1.2e-3; radLength = 36.66;
5443e65e 2096
2097 for(Int_t i=0; i<steps; i++) {
2098 x = xin + i*dx + dx/2;
029cd327 2099 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2100 InsertLayer(ppl);
2101 }
2102
2103
3c625a9b 2104 // Double_t alpha=AliTRDgeometry::GetAlpha();
5443e65e 2105
2106 // add layers for each of the planes
2107
2108 Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
2109 Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
2110 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2111 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2112 Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
2113 Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
2114 Double_t dxPlane = dxTEC + dxSpace;
2115
029cd327 2116 Int_t tb, tbIndex;
2117 const Int_t kNchambers = AliTRDgeometry::Ncham();
3c625a9b 2118 Double_t ymax = 0;
2119 //, holeYmax = 0;
2120 Double_t ymaxsensitive=0;
029cd327 2121 Double_t *zc = new Double_t[kNchambers];
2122 Double_t *zmax = new Double_t[kNchambers];
3c625a9b 2123 Double_t *zmaxsensitive = new Double_t[kNchambers];
2124 // Double_t holeZmax = 1000.; // the whole sector is missing
5443e65e 2125
5443e65e 2126 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3c625a9b 2127 //
5443e65e 2128 // Radiator
2129 xin = xtrd + plane * dxPlane; xout = xin + dxRad;
029cd327 2130 steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2131 for(Int_t i=0; i<steps; i++) {
2132 x = xin + i*dx + dx/2;
3c625a9b 2133 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2134 InsertLayer(ppl);
2135 }
2136
3c625a9b 2137 ymax = fGeom->GetChamberWidth(plane)/2.;
2138 ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
2139
029cd327 2140 for(Int_t ch = 0; ch < kNchambers; ch++) {
2141 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
5443e65e 2142 Float_t pad = fPar->GetRowPadSize(plane,ch,0);
2143 Float_t row0 = fPar->GetRow0(plane,ch,0);
2144 Int_t nPads = fPar->GetRowMax(plane,ch,0);
857b3eb0 2145 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
3c625a9b 2146 // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
2147 zc[ch] = (pad * nPads)/2 + row0;
2148 //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
2149
5443e65e 2150 }
2151
2152 dx = fPar->GetTimeBinSize();
029cd327 2153 rho = 0.00295 * 0.85; radLength = 11.0;
5443e65e 2154
2155 Double_t x0 = (Double_t) fPar->GetTime0(plane);
2156 Double_t xbottom = x0 - dxDrift;
2157 Double_t xtop = x0 + dxAmp;
3c625a9b 2158 //
5443e65e 2159 // Amplification region
5443e65e 2160 steps = (Int_t) (dxAmp/dx);
2161
2162 for(tb = 0; tb < steps; tb++) {
2163 x = x0 + tb * dx + dx/2;
029cd327 2164 tbIndex = CookTimeBinIndex(plane, -tb-1);
2165 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2166 ppl->SetYmax(ymax,ymaxsensitive);
2167 ppl->SetZ(zc, zmax, zmaxsensitive);
2168 ppl->SetHoles(holes);
5443e65e 2169 InsertLayer(ppl);
2170 }
029cd327 2171 tbIndex = CookTimeBinIndex(plane, -steps);
5443e65e 2172 x = (x + dx/2 + xtop)/2;
2173 dx = 2*(xtop-x);
029cd327 2174 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2175 ppl->SetYmax(ymax,ymaxsensitive);
2176 ppl->SetZ(zc, zmax,zmaxsensitive);
2177 ppl->SetHoles(holes);
5443e65e 2178 InsertLayer(ppl);
2179
2180 // Drift region
2181 dx = fPar->GetTimeBinSize();
2182 steps = (Int_t) (dxDrift/dx);
2183
2184 for(tb = 0; tb < steps; tb++) {
2185 x = x0 - tb * dx - dx/2;
029cd327 2186 tbIndex = CookTimeBinIndex(plane, tb);
5443e65e 2187
029cd327 2188 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2189 ppl->SetYmax(ymax,ymaxsensitive);
2190 ppl->SetZ(zc, zmax, zmaxsensitive);
2191 ppl->SetHoles(holes);
5443e65e 2192 InsertLayer(ppl);
2193 }
029cd327 2194 tbIndex = CookTimeBinIndex(plane, steps);
5443e65e 2195 x = (x - dx/2 + xbottom)/2;
2196 dx = 2*(x-xbottom);
029cd327 2197 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2198 ppl->SetYmax(ymax,ymaxsensitive);
2199 ppl->SetZ(zc, zmax, zmaxsensitive);
2200 ppl->SetHoles(holes);
5443e65e 2201 InsertLayer(ppl);
2202
2203 // Pad Plane
029cd327 2204 xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
2205 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3c625a9b 2206 ppl->SetYmax(ymax,ymaxsensitive);
2207 ppl->SetZ(zc, zmax,zmax);
2208 ppl->SetHoles(holes);
5443e65e 2209 InsertLayer(ppl);
2210
2211 // Rohacell
2212 xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
029cd327 2213 steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2214 for(Int_t i=0; i<steps; i++) {
2215 x = xin + i*dx + dx/2;
029cd327 2216 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3c625a9b 2217 ppl->SetYmax(ymax,ymaxsensitive);
2218 ppl->SetZ(zc, zmax,zmax);
2219 ppl->SetHoles(holes);
5443e65e 2220 InsertLayer(ppl);
2221 }
2222
2223 // Space between the chambers, air
2224 xin = xout; xout = xtrd + (plane + 1) * dxPlane;
029cd327 2225 steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2226 for(Int_t i=0; i<steps; i++) {
2227 x = xin + i*dx + dx/2;
029cd327 2228 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2229 InsertLayer(ppl);
2230 }
2231 }
2232
2233 // Space between the TRD and RICH
2234 Double_t xRICH = 500.;
2235 xin = xout; xout = xRICH;
029cd327 2236 steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2237 for(Int_t i=0; i<steps; i++) {
2238 x = xin + i*dx + dx/2;
029cd327 2239 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2240 InsertLayer(ppl);
2241 }
2242
2243 MapTimeBinLayers();
029cd327 2244 delete [] zc;
2245 delete [] zmax;
5443e65e 2246
2247}
2248
2249//______________________________________________________
2250
029cd327 2251Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
5443e65e 2252{
2253 //
2254 // depending on the digitization parameters calculates "global"
029cd327 2255 // time bin index for timebin <localTB> in plane <plane>
5443e65e 2256 //
2257
2258 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2259 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2260 Double_t dx = (Double_t) fPar->GetTimeBinSize();
2261
2262 Int_t tbAmp = fPar->GetTimeBefore();
2263 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 2264 if(kTRUE) maxAmp = 0; // intentional until we change parameter class
5443e65e 2265 Int_t tbDrift = fPar->GetTimeMax();
2266 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
2267
029cd327 2268 Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
5443e65e 2269
029cd327 2270 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
5443e65e 2271
029cd327 2272 if((localTB < 0) &&
2273 (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
2274 if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
5443e65e 2275
2276 return gtb;
2277
2278
2279}
2280
2281//______________________________________________________
2282
2283void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2284{
2285 //
2286 // For all sensitive time bins sets corresponding layer index
2287 // in the array fTimeBins
2288 //
2289
2290 Int_t index;
2291
2292 for(Int_t i = 0; i < fN; i++) {
2293 index = fLayers[i]->GetTimeBinIndex();
2294
2295 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2296
2297 if(index < 0) continue;
029cd327 2298 if(index >= (Int_t) kMaxTimeBinIndex) {
5443e65e 2299 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2300 printf(" index %d exceeds allowed maximum of %d!\n",
029cd327 2301 index, kMaxTimeBinIndex-1);
5443e65e 2302 continue;
2303 }
2304 fTimeBinIndex[index] = i;
2305 }
2306
2307 Double_t x1, dx1, x2, dx2, gap;
2308
2309 for(Int_t i = 0; i < fN-1; i++) {
2310 x1 = fLayers[i]->GetX();
2311 dx1 = fLayers[i]->GetdX();
2312 x2 = fLayers[i+1]->GetX();
2313 dx2 = fLayers[i+1]->GetdX();
2314 gap = (x2 - dx2/2) - (x1 + dx1/2);
2315 if(gap < -0.01) {
2316 printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
2317 printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
2318 }
2319 if(gap > 0.01) {
2320 printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
2321 printf(" (%f - %f) - (%f + %f) = %f\n",
a9814c09 2322 x2, dx2/2, x1, dx1, gap);
5443e65e 2323 }
2324 }
2325}
2326
2327
2328//______________________________________________________
2329
2330
2331Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2332{
2333 //
2334 // Returns the number of time bin which in radial position is closest to <x>
2335 //
2336
2337 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2338 if(x <= fLayers[0]->GetX()) return 0;
2339
2340 Int_t b=0, e=fN-1, m=(b+e)/2;
2341 for (; b<e; m=(b+e)/2) {
2342 if (x > fLayers[m]->GetX()) b=m+1;
2343 else e=m;
2344 }
2345 if(TMath::Abs(x - fLayers[m]->GetX()) >
2346 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2347 else return m;
2348
2349}
2350
2351//______________________________________________________
2352
2353Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2354{
2355 //
2356 // Returns number of the innermost SENSITIVE propagation layer
2357 //
2358
2359 return GetLayerNumber(0);
2360}
2361
2362//______________________________________________________
2363
2364Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2365{
2366 //
2367 // Returns number of the outermost SENSITIVE time bin
2368 //
2369
2370 return GetLayerNumber(GetNumberOfTimeBins() - 1);
46d29e70 2371}
2372
5443e65e 2373//______________________________________________________
2374
2375Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2376{
2377 //
2378 // Returns number of SENSITIVE time bins
2379 //
2380
2381 Int_t tb, layer;
029cd327 2382 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
5443e65e 2383 layer = GetLayerNumber(tb);
2384 if(layer>=0) break;
2385 }
2386 return tb+1;
2387}
2388
2389//______________________________________________________
2390
2391void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2392{
2393 //
2394 // Insert layer <pl> in fLayers array.
2395 // Layers are sorted according to X coordinate.
2396
029cd327 2397 if ( fN == ((Int_t) kMaxLayersPerSector)) {
5443e65e 2398 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2399 return;
2400 }
2401 if (fN==0) {fLayers[fN++] = pl; return;}
2402 Int_t i=Find(pl->GetX());
2403
2404 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2405 fLayers[i]=pl; fN++;
2406
2407}
2408
2409//______________________________________________________
2410
2411Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2412{
2413 //
2414 // Returns index of the propagation layer nearest to X
2415 //
2416
2417 if (x <= fLayers[0]->GetX()) return 0;
2418 if (x > fLayers[fN-1]->GetX()) return fN;
2419 Int_t b=0, e=fN-1, m=(b+e)/2;
2420 for (; b<e; m=(b+e)/2) {
2421 if (x > fLayers[m]->GetX()) b=m+1;
2422 else e=m;
2423 }
2424 return m;
2425}
2426
3c625a9b 2427//______________________________________________________
2428void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2429{
2430 //
2431 // set centers and the width of sectors
2432 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2433 fZc[icham] = center[icham];
2434 fZmax[icham] = w[icham];
2435 fZmaxSensitive[icham] = wsensitive[icham];
2436 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2437 }
2438}
5443e65e 2439//______________________________________________________
2440
3c625a9b 2441void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2442{
2443 //
2444 // set centers and the width of sectors
2445 fHole = kFALSE;
2446 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2447 fIsHole[icham] = holes[icham];
2448 if (holes[icham]) fHole = kTRUE;
2449 }
2450}
2451
2452
2453
5443e65e 2454void AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
029cd327 2455 Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
a9814c09 2456 Bool_t &lookForCluster) const
5443e65e 2457{
2458 //
029cd327 2459 // Returns radial step <dx>, density <rho>, rad. length <radLength>,
5443e65e 2460 // and sensitivity <lookForCluster> in point <y,z>
2461 //
2462
2463 dx = fdX;
2464 rho = fRho;
029cd327 2465 radLength = fX0;
5443e65e 2466 lookForCluster = kFALSE;
3c625a9b 2467 //
2468 // check dead regions in sensitive volume
5443e65e 2469 if(fTimeBinIndex >= 0) {
3c625a9b 2470 //
2471 Int_t zone=-1;
029cd327 2472 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3c625a9b 2473 if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
2474 zone = ch;
2475 lookForCluster = !(fIsHole[zone]);
2476 if(TMath::Abs(y) > fYmaxSensitive){
2477 lookForCluster = kFALSE;
2478 }
2479 if (fIsHole[zone]) {
2480 //if hole
2481 rho = 1.29e-3;
2482 radLength = 36.66;
2483 }
2484 }
5443e65e 2485 }
3c625a9b 2486 return;
5443e65e 2487 }
3c625a9b 2488 //
2489 //
5443e65e 2490 // check hole
3c625a9b 2491 if (fHole==kFALSE) return;
2492 //
2493 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2494 if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
2495 if (fIsHole[ch]) {
2496 //if hole
2497 rho = 1.29e-3;
2498 radLength = 36.66;
2499 }
2500 }
2501 }
5443e65e 2502 return;
2503}
2504
3c625a9b 2505Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
2506{
2507 //
2508 //
2509 if (fTimeBinIndex < 0) return -20; //unknown
2510 Int_t zone=-10; // dead zone
2511 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2512 if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
2513 zone = ch;
2514 }
2515 return zone;
2516}
2517
2518
5443e65e 2519//______________________________________________________
2520
2521void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
a9814c09 2522 UInt_t index) {
5443e65e 2523
2524// Insert cluster in cluster array.
2525// Clusters are sorted according to Y coordinate.
2526
2527 if(fTimeBinIndex < 0) {
2528 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
2529 return;
2530 }
2531
029cd327 2532 if (fN== (Int_t) kMaxClusterPerTimeBin) {
5443e65e 2533 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
2534 return;
2535 }
2536 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
2537 Int_t i=Find(c->GetY());
2538 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
2539 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
2540 fIndex[i]=index; fClusters[i]=c; fN++;
2541}
2542
2543//______________________________________________________
2544
2545Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const {
2546
2547// Returns index of the cluster nearest in Y
2548
2549 if (y <= fClusters[0]->GetY()) return 0;
2550 if (y > fClusters[fN-1]->GetY()) return fN;
2551 Int_t b=0, e=fN-1, m=(b+e)/2;
2552 for (; b<e; m=(b+e)/2) {
2553 if (y > fClusters[m]->GetY()) b=m+1;
2554 else e=m;
2555 }
2556 return m;
2557}
2558
fd621f36 2559//---------------------------------------------------------
5443e65e 2560
fd621f36 2561Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
2562//
2563// Returns correction factor for tilted pads geometry
2564//
5443e65e 2565
fd621f36 2566 Double_t h01 = sin(TMath::Pi() / 180.0 * fPar->GetTiltingAngle());
2567 Int_t det = c->GetDetector();
2568 Int_t plane = fGeom->GetPlane(det);
b3a5a838 2569
c5a8e3df 2570 //if((plane == 1) || (plane == 3) || (plane == 5)) h01=-h01;
2571 if((plane == 0) || (plane == 2) || (plane == 4)) h01=-h01;
b8dc2353 2572
2573 if(fNoTilt) h01 = 0;
fd621f36 2574
2575 return h01;
2576}
5443e65e 2577
c630aafd 2578
2579
2580
2581
2582