git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Protection added (T.Kuhr)
[u/mrichter/AliRoot.git] / TRD / AliTRDtracker.cxx
CommitLineData
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++;
c5a8e3df 582 seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
c630aafd 583 }
584
1e9bb598 585 //Propagation to the TOF (I.Belikov)
3c625a9b 586
587 if (track->GetStop()==kFALSE){
c5a8e3df 588 if (track->GetNumberOfClusters()>15) seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
589
b94f0a96 590 Double_t xtof=371.;
3c625a9b 591 Double_t c2=track->GetC()*xtof - track->GetEta();
c5a8e3df 592 if (TMath::Abs(c2)>=0.85) {
593 delete track;
594 continue;
595 }
b94f0a96 596 Double_t xTOF0 = 371. ;
5c0368b8 597 if (!PropagateToOuterPlane(*track,xTOF0)) {
598 delete track;
599 continue;
600 }
7bed16a7 601 //
3c625a9b 602 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
603 Double_t y=track->GetYat(xtof);
604 if (y > ymax) {
7ac6fa52 605 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
606 delete track;
7bed16a7 607 continue;
7ac6fa52 608 }
3c625a9b 609 } else if (y <-ymax) {
7ac6fa52 610 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
611 delete track;
7bed16a7 612 continue;
7ac6fa52 613 }
3c625a9b 614 }
615
616 if (track->PropagateTo(xtof)) {
617 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
c5a8e3df 618 seed->SetTRDtrack(new AliTRDtrack(*track));
3c625a9b 619 if (track->GetNumberOfClusters()>foundMin) found++;
620 }
621 }else{
622 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
623 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
b94f0a96 624 seed->SetStatus(AliESDtrack::kTRDStop);
c5a8e3df 625 seed->SetTRDtrack(new AliTRDtrack(*track));
3c625a9b 626 found++;
627 }
1e9bb598 628 }
629
d9b8978b 630 delete track;
3c625a9b 631
1e9bb598 632 //End of propagation to the TOF
3c625a9b 633 //if (foundClr>foundMin)
634 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
635
c630aafd 636
637 }
638
639 cerr<<"Number of seeds: "<<fNseeds<<endl;
640 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
641
1e9bb598 642 fSeeds->Clear(); fNseeds=0;
643
644 return 0;
645
646}
647
648//_____________________________________________________________________________
649Int_t AliTRDtracker::RefitInward(AliESD* event)
650{
651 //
652 // Refits tracks within the TRD. The ESD event is expected to contain seeds
653 // at the outer part of the TRD.
654 // The tracks are propagated to the innermost time bin
655 // of the TRD and the ESD event is updated
656 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
657 //
658
659 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
660 Float_t foundMin = fgkMinClustersInTrack * timeBins;
661 Int_t nseed = 0;
662 Int_t found = 0;
663 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
664
665 Int_t n = event->GetNumberOfTracks();
666 for (Int_t i=0; i<n; i++) {
667 AliESDtrack* seed=event->GetTrack(i);
668 ULong_t status=seed->GetStatus();
669 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
46e2d86c 670 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
1e9bb598 671 nseed++;
672
673 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
3c625a9b 674 seed2->ResetCovariance(5.);
1e9bb598 675 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
46e2d86c 676 UInt_t * indexes2 = seed2->GetIndexes();
677 UInt_t * indexes3 = pt->GetBackupIndexes();
678 for (Int_t i=0;i<200;i++) {
679 if (indexes2[i]==0) break;
680 indexes3[i] = indexes2[i];
681 }
682 //AliTRDtrack *pt = seed2;
1e9bb598 683 AliTRDtrack &t=*pt;
684 FollowProlongation(t, innerTB);
7bed16a7 685 /*
46e2d86c 686 if (t.GetNumberOfClusters()<seed->GetTRDclusters(indexes3)*0.5){
687 // debug - why we dont go back?
688 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
689 UInt_t * indexes2 = seed2->GetIndexes();
690 UInt_t * indexes3 = pt2->GetBackupIndexes();
691 for (Int_t i=0;i<200;i++) {
692 if (indexes2[i]==0) break;
693 indexes3[i] = indexes2[i];
694 }
3c625a9b 695 FollowProlongation(*pt2, innerTB);
696 delete pt2;
46e2d86c 697 }
7bed16a7 698 */
1e9bb598 699 if (t.GetNumberOfClusters() >= foundMin) {
46e2d86c 700 // UseClusters(&t);
701 //CookLabel(pt, 1-fgkLabelFraction);
1e9bb598 702 // t.CookdEdx();
703 }
704 found++;
705// cout<<found<<'\r';
706
707 if(PropagateToTPC(t)) {
0fa7dfa7 708 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
7bed16a7 709 }else{
710 //if not prolongation to TPC - propagate without update
711 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
712 seed2->ResetCovariance(5.);
713 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
714 delete seed2;
715 if (PropagateToTPC(*pt2))
716 seed->UpdateTrackParams(pt2, AliESDtrack::kTRDrefit);
717 delete pt2;
1e9bb598 718 }
7bed16a7 719
1e9bb598 720 delete seed2;
721 delete pt;
722 }
723
724 cout<<"Number of loaded seeds: "<<nseed<<endl;
725 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
726
c630aafd 727 return 0;
728
729}
730
bbf92647 731
5443e65e 732//---------------------------------------------------------------------------
733Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
734{
735 // Starting from current position on track=t this function tries
736 // to extrapolate the track up to timeBin=0 and to confirm prolongation
737 // if a close cluster is found. Returns the number of clusters
738 // expected to be found in sensitive layers
bbf92647 739
5443e65e 740 Float_t wIndex, wTB, wChi2;
741 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
742 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
743 Float_t wPx, wPy, wPz, wC;
029cd327 744 Double_t px, py, pz;
5443e65e 745 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
3c625a9b 746 Int_t lastplane = GetLastPlane(&t);
46d29e70 747
5443e65e 748 Int_t trackIndex = t.GetLabel();
46d29e70 749
5443e65e 750 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
46d29e70 751
029cd327 752 Int_t tryAgain=fMaxGap;
46d29e70 753
5443e65e 754 Double_t alpha=t.GetAlpha();
c630aafd 755 alpha = TVector2::Phi_0_2pi(alpha);
46d29e70 756
5443e65e 757 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
029cd327 758 Double_t radLength, rho, x, dx, y, ymax, z;
46d29e70 759
5443e65e 760 Int_t expectedNumberOfClusters = 0;
761 Bool_t lookForCluster;
46d29e70 762
5443e65e 763 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 764
5443e65e 765
766 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
767
768 y = t.GetY(); z = t.GetZ();
769
770 // first propagate to the inner surface of the current time bin
029cd327 771 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 772 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
029cd327 773 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 774 y = t.GetY();
775 ymax = x*TMath::Tan(0.5*alpha);
776 if (y > ymax) {
777 s = (s+1) % ns;
778 if (!t.Rotate(alpha)) break;
029cd327 779 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 780 } else if (y <-ymax) {
781 s = (s-1+ns) % ns;
782 if (!t.Rotate(-alpha)) break;
029cd327 783 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 784 }
46d29e70 785
5443e65e 786 y = t.GetY(); z = t.GetZ();
787
788 // now propagate to the middle plane of the next time bin
029cd327 789 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 790 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 791 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 792 y = t.GetY();
793 ymax = x*TMath::Tan(0.5*alpha);
794 if (y > ymax) {
795 s = (s+1) % ns;
796 if (!t.Rotate(alpha)) break;
029cd327 797 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 798 } else if (y <-ymax) {
799 s = (s-1+ns) % ns;
800 if (!t.Rotate(-alpha)) break;
029cd327 801 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 802 }
46d29e70 803
46d29e70 804
5443e65e 805 if(lookForCluster) {
a819a5f7 806
5443e65e 807 expectedNumberOfClusters++;
5443e65e 808 wIndex = (Float_t) t.GetLabel();
809 wTB = nr;
46d29e70 810
029cd327 811 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
46d29e70 812
5443e65e 813 Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
5443e65e 814 Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
46d29e70 815
5443e65e 816 Double_t road;
817 if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
818 else return expectedNumberOfClusters;
819
820 wYrt = (Float_t) y;
821 wZrt = (Float_t) z;
822 wYwindow = (Float_t) road;
029cd327 823 t.GetPxPyPz(px,py,pz);
824 wPx = (Float_t) px;
825 wPy = (Float_t) py;
826 wPz = (Float_t) pz;
5443e65e 827 wC = (Float_t) t.GetC();
828 wSigmaC2 = (Float_t) t.GetSigmaC2();
829 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
830 wSigmaY2 = (Float_t) t.GetSigmaY2();
831 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
832 wChi2 = -1;
833
5443e65e 834
835 AliTRDcluster *cl=0;
836 UInt_t index=0;
837
029cd327 838 Double_t maxChi2=fgkMaxChi2;
5443e65e 839
840 wYclosest = 12345678;
841 wYcorrect = 12345678;
842 wZclosest = 12345678;
843 wZcorrect = 12345678;
844 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
845
846 // Find the closest correct cluster for debugging purposes
029cd327 847 if (timeBin) {
a9814c09 848 Float_t minDY = 1000000;
029cd327 849 for (Int_t i=0; i<timeBin; i++) {
850 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 851 if((c->GetLabel(0) != trackIndex) &&
852 (c->GetLabel(1) != trackIndex) &&
853 (c->GetLabel(2) != trackIndex)) continue;
854 if(TMath::Abs(c->GetY() - y) > minDY) continue;
855 minDY = TMath::Abs(c->GetY() - y);
856 wYcorrect = c->GetY();
857 wZcorrect = c->GetZ();
858
859 Double_t h01 = GetTiltFactor(c);
860 wChi2 = t.GetPredictedChi2(c, h01);
861 }
5443e65e 862 }
46d29e70 863
5443e65e 864 // Now go for the real cluster search
a819a5f7 865
029cd327 866 if (timeBin) {
46e2d86c 867 //
868 //find cluster in history
869 cl =0;
870
871 AliTRDcluster * cl0 = timeBin[0];
872 if (!cl0) {
873 continue;
874 }
875 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
3c625a9b 876 if (plane>lastplane) continue;
46e2d86c 877 Int_t timebin = cl0->GetLocalTimeBin();
878 AliTRDcluster * cl2= GetCluster(&t,plane, timebin);
3c625a9b 879 if (cl2) {
880 cl =cl2;
881 Double_t h01 = GetTiltFactor(cl);
882 maxChi2=t.GetPredictedChi2(cl,h01);
883 }
46e2d86c 884 if ((!cl) && road>fgkWideRoad) {
885 //if (t.GetNumberOfClusters()>4)
886 // cerr<<t.GetNumberOfClusters()
887 // <<"FindProlongation warning: Too broad road !\n";
888 continue;
889 }
890
891
892 if(!cl){
893
894 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
895 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
896 if (c->GetY() > y+road) break;
897 if (c->IsUsed() > 0) continue;
898 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
899
900 Double_t h01 = GetTiltFactor(c);
901 Double_t chi2=t.GetPredictedChi2(c,h01);
902
903 if (chi2 > maxChi2) continue;
904 maxChi2=chi2;
905 cl=c;
906 index=timeBin.GetIndex(i);
907 }
908 }
a9814c09 909
910 if(!cl) {
911
029cd327 912 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
913 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 914
915 if (c->GetY() > y+road) break;
916 if (c->IsUsed() > 0) continue;
917 if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
918
919 Double_t h01 = GetTiltFactor(c);
920 Double_t chi2=t.GetPredictedChi2(c, h01);
921
029cd327 922 if (chi2 > maxChi2) continue;
923 maxChi2=chi2;
a9814c09 924 cl=c;
029cd327 925 index=timeBin.GetIndex(i);
a9814c09 926 }
927 }
a9814c09 928 if (cl) {
929 wYclosest = cl->GetY();
930 wZclosest = cl->GetZ();
931 Double_t h01 = GetTiltFactor(cl);
932
933 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
46e2d86c 934 //printf("Track position\t%f\t%f\t%f\n",t.GetX(),t.GetY(),t.GetZ());
935 //printf("Cluster position\t%d\t%f\t%f\n",cl->GetLocalTimeBin(),cl->GetY(),cl->GetZ());
3c625a9b 936 Int_t det = cl->GetDetector();
937 Int_t plane = fGeom->GetPlane(det);
46e2d86c 938
3c625a9b 939 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
940 //if(!t.Update(cl,maxChi2,index,h01)) {
941 //if(!tryAgain--) return 0;
a9814c09 942 }
029cd327 943 else tryAgain=fMaxGap;
a9814c09 944 }
945 else {
3c625a9b 946 //if (tryAgain==0) break;
029cd327 947 tryAgain--;
a9814c09 948 }
949
950 /*
951 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
952
953 printf(" %f", wIndex); //1
954 printf(" %f", wTB); //2
955 printf(" %f", wYrt); //3
956 printf(" %f", wYclosest); //4
957 printf(" %f", wYcorrect); //5
958 printf(" %f", wYwindow); //6
959 printf(" %f", wZrt); //7
960 printf(" %f", wZclosest); //8
961 printf(" %f", wZcorrect); //9
962 printf(" %f", wZwindow); //10
963 printf(" %f", wPx); //11
964 printf(" %f", wPy); //12
965 printf(" %f", wPz); //13
966 printf(" %f", wSigmaC2*1000000); //14
967 printf(" %f", wSigmaTgl2*1000); //15
968 printf(" %f", wSigmaY2); //16
969 // printf(" %f", wSigmaZ2); //17
970 printf(" %f", wChi2); //17
971 printf(" %f", wC); //18
972 printf("\n");
973 }
974 */
5443e65e 975 }
976 }
977 }
978 return expectedNumberOfClusters;
979
980
981}
a819a5f7 982
5443e65e 983//___________________________________________________________________
46d29e70 984
5443e65e 985Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
986{
987 // Starting from current radial position of track <t> this function
988 // extrapolates the track up to outer timebin and in the sensitive
989 // layers confirms prolongation if a close cluster is found.
990 // Returns the number of clusters expected to be found in sensitive layers
46d29e70 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 //
1041 Float_t angle = t.GetAlpha(); // MI - if rotation - we go through the material -
9c9d2487 1042 if (!AdjustSector(&t)) break;
3c625a9b 1043 if (TMath::Abs(angle - t.GetAlpha())>0.000001) break; //better to stop track
1044 Int_t currentzone = fTrSec[s]->GetLayer(nr)->GetZone(z);
1045 if (currentzone==-10) break; // we are in the frame
1046 if (currentzone>-10){ // layer knows where we are
1047 if (zone==-10) zone = currentzone;
1048 if (zone!=currentzone) break;
1049 }
1050 //
1051 //
9c9d2487 1052 s = t.GetSector();
029cd327 1053 if (!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1054
5443e65e 1055 y = t.GetY();
9c9d2487 1056 z = t.GetZ();
a819a5f7 1057
9c9d2487 1058 // Barrel Tracks [SR, 04.04.2003]
46d29e70 1059
9c9d2487 1060 s = t.GetSector();
1061 if (fTrSec[s]->GetLayer(nr)->IsSensitive() !=
1062 fTrSec[s]->GetLayer(nr+1)->IsSensitive() ) {
46d29e70 1063
c630aafd 1064// if (IsStoringBarrel()) StoreBarrelTrack(&t, nRefPlane++, kTrackBack);
9c9d2487 1065 }
46d29e70 1066
9c9d2487 1067 if (fTrSec[s]->GetLayer(nr-1)->IsSensitive() &&
1068 ! fTrSec[s]->GetLayer(nr)->IsSensitive()) {
1069 isNewLayer = kTRUE;
1070 } else {isNewLayer = kFALSE;}
46d29e70 1071
5443e65e 1072 y = t.GetY();
9c9d2487 1073 z = t.GetZ();
a819a5f7 1074
9c9d2487 1075 // now propagate to the middle plane of the next time bin
029cd327 1076 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1077
9c9d2487 1078 x = fTrSec[s]->GetLayer(nr+1)->GetX();
029cd327 1079 if(!t.PropagateTo(x,radLength,rho)) break;
9c9d2487 1080 if (!AdjustSector(&t)) break;
1081 s = t.GetSector();
029cd327 1082 if(!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1083
9c9d2487 1084 y = t.GetY();
1085 z = t.GetZ();
1086
1087 if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
5443e65e 1088 // printf("label %d, pl %d, lookForCluster %d \n",
a9814c09 1089 // trackIndex, nr+1, lookForCluster);
5443e65e 1090
1091 if(lookForCluster) {
1092 expectedNumberOfClusters++;
1093
1094 wIndex = (Float_t) t.GetLabel();
1095 wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
1096
029cd327 1097 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
5443e65e 1098 Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
1099 Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
1100 if((t.GetSigmaY2() + sy2) < 0) break;
1101 Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
1102 Double_t y=t.GetY(), z=t.GetZ();
1103
1104 wYrt = (Float_t) y;
1105 wZrt = (Float_t) z;
1106 wYwindow = (Float_t) road;
029cd327 1107 t.GetPxPyPz(px,py,pz);
1108 wPx = (Float_t) px;
1109 wPy = (Float_t) py;
1110 wPz = (Float_t) pz;
5443e65e 1111 wC = (Float_t) t.GetC();
1112 wSigmaC2 = (Float_t) t.GetSigmaC2();
1113 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1114 wSigmaY2 = (Float_t) t.GetSigmaY2();
1115 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1116 wChi2 = -1;
1117
029cd327 1118 if (road>fgkWideRoad) {
a9814c09 1119 if (t.GetNumberOfClusters()>4)
1120 cerr<<t.GetNumberOfClusters()
1121 <<"FindProlongation warning: Too broad road !\n";
1122 return 0;
5443e65e 1123 }
1124
1125 AliTRDcluster *cl=0;
1126 UInt_t index=0;
1127
029cd327 1128 Double_t maxChi2=fgkMaxChi2;
5443e65e 1129
9c9d2487 1130 if (isNewLayer) {
1131 road = 3 * road;
1132 //sz2 = 3 * sz2;
029cd327 1133 maxChi2 = 10 * fgkMaxChi2;
9c9d2487 1134 }
1135
029cd327 1136 if (nRefPlane == fgkFirstPlane) maxChi2 = 20 * fgkMaxChi2;
1137 if (nRefPlane == fgkFirstPlane+2) maxChi2 = 15 * fgkMaxChi2;
1138 if (t.GetNRotate() > 0) maxChi2 = 3 * maxChi2;
9c9d2487 1139
1140
5443e65e 1141 wYclosest = 12345678;
1142 wYcorrect = 12345678;
1143 wZclosest = 12345678;
1144 wZcorrect = 12345678;
1145 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1146
1147 // Find the closest correct cluster for debugging purposes
029cd327 1148 if (timeBin) {
9c9d2487 1149 minDY = 1000000;
029cd327 1150 for (Int_t i=0; i<timeBin; i++) {
1151 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1152 if((c->GetLabel(0) != trackIndex) &&
1153 (c->GetLabel(1) != trackIndex) &&
1154 (c->GetLabel(2) != trackIndex)) continue;
1155 if(TMath::Abs(c->GetY() - y) > minDY) continue;
9c9d2487 1156 //minDY = TMath::Abs(c->GetY() - y);
1157 minDY = c->GetY() - y;
a9814c09 1158 wYcorrect = c->GetY();
1159 wZcorrect = c->GetZ();
1160
1161 Double_t h01 = GetTiltFactor(c);
1162 wChi2 = t.GetPredictedChi2(c, h01);
1163 }
5443e65e 1164 }
46d29e70 1165
5443e65e 1166 // Now go for the real cluster search
46d29e70 1167
029cd327 1168 if (timeBin) {
5443e65e 1169
029cd327 1170 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1171 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1172 if (c->GetY() > y+road) break;
9c9d2487 1173 if (c->IsUsed() > 0) continue;
a9814c09 1174 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1175
1176 Double_t h01 = GetTiltFactor(c);
9c9d2487 1177 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1178
029cd327 1179 if (chi2 > maxChi2) continue;
1180 maxChi2=chi2;
a9814c09 1181 cl=c;
029cd327 1182 index=timeBin.GetIndex(i);
9c9d2487 1183
1184 //check is correct
1185 if((c->GetLabel(0) != trackIndex) &&
1186 (c->GetLabel(1) != trackIndex) &&
1187 (c->GetLabel(2) != trackIndex)) t.AddNWrong();
a9814c09 1188 }
5443e65e 1189
a9814c09 1190 if(!cl) {
1191
029cd327 1192 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1193 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1194
1195 if (c->GetY() > y+road) break;
9c9d2487 1196 if (c->IsUsed() > 0) continue;
a9814c09 1197 if((c->GetZ()-z)*(c->GetZ()-z) > 2.25 * 12 * sz2) continue;
1198
1199 Double_t h01 = GetTiltFactor(c);
9c9d2487 1200 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1201
029cd327 1202 if (chi2 > maxChi2) continue;
1203 maxChi2=chi2;
a9814c09 1204 cl=c;
029cd327 1205 index=timeBin.GetIndex(i);
a9814c09 1206 }
1207 }
1208
1209 if (cl) {
1210 wYclosest = cl->GetY();
1211 wZclosest = cl->GetZ();
1212
1213 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1214 Double_t h01 = GetTiltFactor(cl);
3c625a9b 1215 Int_t det = cl->GetDetector();
1216 Int_t plane = fGeom->GetPlane(det);
1217
1218 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1219 //if(!t.Update(cl,maxChi2,index,h01)) {
029cd327 1220 if(!tryAgain--) return 0;
a9814c09 1221 }
029cd327 1222 else tryAgain=fMaxGap;
a9814c09 1223 }
1224 else {
029cd327 1225 if (tryAgain==0) break;
1226 tryAgain--;
9c9d2487 1227
1228 //if (minDY < 1000000 && isNewLayer)
1229 //cout << "\t" << nRefPlane << "\t" << "\t" << t.GetNRotate() << "\t" <<
029cd327 1230 // road << "\t" << minDY << "\t" << chi2 << "\t" << wChi2 << "\t" << maxChi2 << endl;
9c9d2487 1231
a9814c09 1232 }
1233
9c9d2487 1234 isNewLayer = kFALSE;
1235
a9814c09 1236 /*
1237 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1238
1239 printf(" %f", wIndex); //1
1240 printf(" %f", wTB); //2
1241 printf(" %f", wYrt); //3
1242 printf(" %f", wYclosest); //4
1243 printf(" %f", wYcorrect); //5
1244 printf(" %f", wYwindow); //6
1245 printf(" %f", wZrt); //7
1246 printf(" %f", wZclosest); //8
1247 printf(" %f", wZcorrect); //9
1248 printf(" %f", wZwindow); //10
1249 printf(" %f", wPx); //11
1250 printf(" %f", wPy); //12
1251 printf(" %f", wPz); //13
1252 printf(" %f", wSigmaC2*1000000); //14
1253 printf(" %f", wSigmaTgl2*1000); //15
1254 printf(" %f", wSigmaY2); //16
1255 // printf(" %f", wSigmaZ2); //17
1256 printf(" %f", wChi2); //17
1257 printf(" %f", wC); //18
1258 printf("\n");
1259 }
1260 */
5443e65e 1261 }
1262 }
1263 }
3c625a9b 1264 if (nr<outerTB)
1265 t.SetStop(kTRUE);
1266 else
1267 t.SetStop(kFALSE);
5443e65e 1268 return expectedNumberOfClusters;
9c9d2487 1269
1270
5443e65e 1271}
1272
1e9bb598 1273//---------------------------------------------------------------------------
1274Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
1275{
1276 // Starting from current position on track=t this function tries
1277 // to extrapolate the track up to timeBin=0 and to reuse already
1278 // assigned clusters. Returns the number of clusters
1279 // expected to be found in sensitive layers
1280 // get indices of assigned clusters for each layer
1281 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1282
1283 Int_t iCluster[90];
1284 for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
1285 for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
1286 Int_t index = t.GetClusterIndex(i);
1287 AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
1288 if (!cl) continue;
1289 Int_t detector=cl->GetDetector();
1290 Int_t localTimeBin=cl->GetLocalTimeBin();
1291 Int_t sector=fGeom->GetSector(detector);
1292 Int_t plane=fGeom->GetPlane(detector);
1293
1294 Int_t trackingSector = CookSectorIndex(sector);
1295
1296 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1297 if(gtb < 0) continue;
1298 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1299 iCluster[layer] = index;
1300 }
1301 t.ResetClusters();
1302
1303 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1304
1305 Double_t alpha=t.GetAlpha();
1306 alpha = TVector2::Phi_0_2pi(alpha);
1307
1308 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1309 Double_t radLength, rho, x, dx, y, ymax, z;
1310
1311 Int_t expectedNumberOfClusters = 0;
1312 Bool_t lookForCluster;
1313
1314 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1315
1316
1317 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1318
1319 y = t.GetY(); z = t.GetZ();
1320
1321 // first propagate to the inner surface of the current time bin
1322 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1323 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1324 if(!t.PropagateTo(x,radLength,rho)) break;
1325 y = t.GetY();
1326 ymax = x*TMath::Tan(0.5*alpha);
1327 if (y > ymax) {
1328 s = (s+1) % ns;
1329 if (!t.Rotate(alpha)) break;
1330 if(!t.PropagateTo(x,radLength,rho)) break;
1331 } else if (y <-ymax) {
1332 s = (s-1+ns) % ns;
1333 if (!t.Rotate(-alpha)) break;
1334 if(!t.PropagateTo(x,radLength,rho)) break;
1335 }
1336
1337 y = t.GetY(); z = t.GetZ();
1338
1339 // now propagate to the middle plane of the next time bin
1340 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1341 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1342 if(!t.PropagateTo(x,radLength,rho)) break;
1343 y = t.GetY();
1344 ymax = x*TMath::Tan(0.5*alpha);
1345 if (y > ymax) {
1346 s = (s+1) % ns;
1347 if (!t.Rotate(alpha)) break;
1348 if(!t.PropagateTo(x,radLength,rho)) break;
1349 } else if (y <-ymax) {
1350 s = (s-1+ns) % ns;
1351 if (!t.Rotate(-alpha)) break;
1352 if(!t.PropagateTo(x,radLength,rho)) break;
1353 }
1354
1355 if(lookForCluster) expectedNumberOfClusters++;
1356
1357 // use assigned cluster
1358 if (!iCluster[nr-1]) continue;
1359 AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
1360 Double_t h01 = GetTiltFactor(cl);
1361 Double_t chi2=t.GetPredictedChi2(cl, h01);
1362 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1363 t.Update(cl,chi2,iCluster[nr-1],h01);
1364 }
1365
1366 return expectedNumberOfClusters;
1367}
1368
5443e65e 1369//___________________________________________________________________
1370
1371Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
1372{
1373 // Starting from current radial position of track <t> this function
1374 // extrapolates the track up to radial position <xToGo>.
1375 // Returns 1 if track reaches the plane, and 0 otherwise
1376
1377 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1378
1379 Double_t alpha=t.GetAlpha();
1380
1381 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1382 if (alpha < 0. ) alpha += 2.*TMath::Pi();
1383
1384 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1385
1386 Bool_t lookForCluster;
029cd327 1387 Double_t radLength, rho, x, dx, y, ymax, z;
5443e65e 1388
1389 x = t.GetX();
1390
1391 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1392
1393 Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
1394
1395 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
1396
1397 y = t.GetY(); z = t.GetZ();
1398
1399 // first propagate to the outer surface of the current time bin
029cd327 1400 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1401 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1402 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1403 y = t.GetY();
1404 ymax = x*TMath::Tan(0.5*alpha);
1405 if (y > ymax) {
1406 s = (s+1) % ns;
1407 if (!t.Rotate(alpha)) return 0;
1408 } else if (y <-ymax) {
1409 s = (s-1+ns) % ns;
1410 if (!t.Rotate(-alpha)) return 0;
1411 }
029cd327 1412 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1413
1414 y = t.GetY(); z = t.GetZ();
1415
1416 // now propagate to the middle plane of the next time bin
029cd327 1417 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1418 x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1419 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1420 y = t.GetY();
1421 ymax = x*TMath::Tan(0.5*alpha);
1422 if (y > ymax) {
1423 s = (s+1) % ns;
1424 if (!t.Rotate(alpha)) return 0;
1425 } else if (y <-ymax) {
1426 s = (s-1+ns) % ns;
1427 if (!t.Rotate(-alpha)) return 0;
1428 }
029cd327 1429 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1430 }
1431 return 1;
1432}
1433
1434//___________________________________________________________________
1435
1436Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
1437{
1438 // Starting from current radial position of track <t> this function
1439 // extrapolates the track up to radial position of the outermost
1440 // padrow of the TPC.
1441 // Returns 1 if track reaches the TPC, and 0 otherwise
1442
c630aafd 1443 //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
5443e65e 1444
1445 Double_t alpha=t.GetAlpha();
c630aafd 1446 alpha = TVector2::Phi_0_2pi(alpha);
5443e65e 1447
1448 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1449
1450 Bool_t lookForCluster;
029cd327 1451 Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
5443e65e 1452
1453 x = t.GetX();
1454
1455 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
5443e65e 1456 Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
1457
1458 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
1459
9c9d2487 1460 y = t.GetY();
1461 z = t.GetZ();
5443e65e 1462
1463 // first propagate to the outer surface of the current time bin
029cd327 1464 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1465 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
1466
029cd327 1467 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1468 AdjustSector(&t);
029cd327 1469 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1470
9c9d2487 1471 y = t.GetY();
1472 z = t.GetZ();
5443e65e 1473
1474 // now propagate to the middle plane of the next time bin
029cd327 1475 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1476 x = fTrSec[s]->GetLayer(nr-1)->GetX();
1477
029cd327 1478 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1479 AdjustSector(&t);
029cd327 1480 if(!t.PropagateTo(x,radLength,rho)) return 0;
c5a8e3df 1481 }
5443e65e 1482 return 1;
1483}
1484
c630aafd 1485//_____________________________________________________________________________
1486Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1487{
1488 // Fills clusters into TRD tracking_sectors
1489 // Note that the numbering scheme for the TRD tracking_sectors
1490 // differs from that of TRD sectors
1491
1492 if (ReadClusters(fClusters,cTree)) {
1493 Error("LoadClusters","Problem with reading the clusters !");
1494 return 1;
1495 }
1496 Int_t ncl=fClusters->GetEntriesFast();
b7a0917f 1497 fNclusters=ncl;
c630aafd 1498 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1499
1500 UInt_t index;
3c625a9b 1501 for (Int_t ichamber=0;ichamber<5;ichamber++)
1502 for (Int_t isector=0;isector<18;isector++){
1503 fHoles[ichamber][isector]=kTRUE;
1504 }
1505
1506
c630aafd 1507 while (ncl--) {
1508// printf("\r %d left ",ncl);
1509 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1510 Int_t detector=c->GetDetector();
1511 Int_t localTimeBin=c->GetLocalTimeBin();
c630aafd 1512 Int_t sector=fGeom->GetSector(detector);
1513 Int_t plane=fGeom->GetPlane(detector);
3c625a9b 1514
029cd327 1515 Int_t trackingSector = CookSectorIndex(sector);
3c625a9b 1516 if (c->GetLabel(0)>0){
1517 Int_t chamber = fGeom->GetChamber(detector);
1518 fHoles[chamber][trackingSector]=kFALSE;
1519 }
c630aafd 1520
029cd327 1521 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
c630aafd 1522 if(gtb < 0) continue;
029cd327 1523 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
c630aafd 1524
1525 index=ncl;
029cd327 1526 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
c630aafd 1527 }
7bed16a7 1528 // printf("\r\n");
3c625a9b 1529 //
1530 //
1531 /*
1532 for (Int_t isector=0;isector<18;isector++){
1533 for (Int_t ichamber=0;ichamber<5;ichamber++)
1534 if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
1535 printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
1536 fGeom->IsHole(0,ichamber,17-isector));
1537 }
1538 */
c630aafd 1539 return 0;
1540}
1541
5443e65e 1542//_____________________________________________________________________________
b7a0917f 1543void AliTRDtracker::UnloadClusters()
5443e65e 1544{
1545 //
1546 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1547 //
1548
1549 Int_t i, nentr;
1550
1551 nentr = fClusters->GetEntriesFast();
1552 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
b7a0917f 1553 fNclusters = 0;
5443e65e 1554
1555 nentr = fSeeds->GetEntriesFast();
1556 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1557
1558 nentr = fTracks->GetEntriesFast();
1559 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1560
1561 Int_t nsec = AliTRDgeometry::kNsect;
1562
1563 for (i = 0; i < nsec; i++) {
1564 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1565 fTrSec[i]->GetLayer(pl)->Clear();
1566 }
1567 }
1568
1569}
1570
1571//__________________________________________________________________________
1572void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
1573{
1574 // Creates track seeds using clusters in timeBins=i1,i2
1575
1576 if(turn > 2) {
1577 cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
1578 return;
1579 }
1580
1581 Double_t x[5], c[15];
029cd327 1582 Int_t maxSec=AliTRDgeometry::kNsect;
5443e65e 1583
1584 Double_t alpha=AliTRDgeometry::GetAlpha();
1585 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
1586 Double_t cs=cos(alpha), sn=sin(alpha);
1587 Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
1588
1589
1590 Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
1591 Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
1592
1593 Double_t x1 =fTrSec[0]->GetX(i1);
1594 Double_t xx2=fTrSec[0]->GetX(i2);
1595
029cd327 1596 for (Int_t ns=0; ns<maxSec; ns++) {
5443e65e 1597
029cd327 1598 Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1599 Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
5443e65e 1600 Int_t nm=(*fTrSec[ns]->GetLayer(i2));
029cd327 1601 Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1602 Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
5443e65e 1603
1604 AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
1605
1606 for (Int_t is=0; is < r1; is++) {
1607 Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
1608
1609 for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
a9814c09 1610
1611 const AliTRDcluster *cl;
1612 Double_t x2, y2, z2;
1613 Double_t x3=0., y3=0.;
1614
1615 if (js<nl2) {
1616 if(turn != 2) continue;
029cd327 1617 AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1618 cl=r2[js];
1619 y2=cl->GetY(); z2=cl->GetZ();
1620
1621 x2= xx2*cs2+y2*sn2;
1622 y2=-xx2*sn2+y2*cs2;
1623 }
1624 else if (js<nl2+nl) {
1625 if(turn != 1) continue;
029cd327 1626 AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1627 cl=r2[js-nl2];
1628 y2=cl->GetY(); z2=cl->GetZ();
1629
1630 x2= xx2*cs+y2*sn;
1631 y2=-xx2*sn+y2*cs;
1632 }
1633 else if (js<nl2+nl+nm) {
1634 if(turn != 1) continue;
1635 AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
1636 cl=r2[js-nl2-nl];
1637 x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
1638 }
1639 else if (js<nl2+nl+nm+nu) {
1640 if(turn != 1) continue;
029cd327 1641 AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
a9814c09 1642 cl=r2[js-nl2-nl-nm];
1643 y2=cl->GetY(); z2=cl->GetZ();
1644
1645 x2=xx2*cs-y2*sn;
1646 y2=xx2*sn+y2*cs;
1647 }
1648 else {
1649 if(turn != 2) continue;
029cd327 1650 AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
a9814c09 1651 cl=r2[js-nl2-nl-nm-nu];
1652 y2=cl->GetY(); z2=cl->GetZ();
1653
1654 x2=xx2*cs2-y2*sn2;
1655 y2=xx2*sn2+y2*cs2;
1656 }
1657
029cd327 1658 if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
a9814c09 1659
1660 Double_t zz=z1 - z1/x1*(x1-x2);
1661
029cd327 1662 if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
a9814c09 1663
1664 Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
1665 if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
1666
1667 x[0]=y1;
1668 x[1]=z1;
1669 x[4]=f1trd(x1,y1,x2,y2,x3,y3);
1670
029cd327 1671 if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
a9814c09 1672
1673 x[2]=f2trd(x1,y1,x2,y2,x3,y3);
1674
1675 if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
1676
1677 x[3]=f3trd(x1,y1,x2,y2,z1,z2);
1678
029cd327 1679 if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
a9814c09 1680
1681 Double_t a=asin(x[2]);
1682 Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
1683
029cd327 1684 if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
a9814c09 1685
1686 Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
1687 Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
029cd327 1688 Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
a9814c09 1689
1690 // Tilt changes
1691 Double_t h01 = GetTiltFactor(r1[is]);
029cd327 1692 Double_t xuFactor = 100.;
b8dc2353 1693 if(fNoTilt) {
1694 h01 = 0;
029cd327 1695 xuFactor = 1;
b8dc2353 1696 }
1697
fd621f36 1698 sy1=sy1+sz1*h01*h01;
b3a5a838 1699 Double_t syz=sz1*(-h01);
a9814c09 1700 // end of tilt changes
1701
b3a5a838 1702 Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
1703 Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
1704 Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
1705 Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
1706 Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
1707 Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
1708 Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
1709 Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
1710 Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
1711 Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
1712
a9814c09 1713
b3a5a838 1714 c[0]=sy1;
a9814c09 1715 // c[1]=0.; c[2]=sz1;
029cd327 1716 c[1]=syz; c[2]=sz1*xuFactor;
b3a5a838 1717 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
1718 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
1719 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
1720 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
1721 c[13]=f30*sy1*f40+f32*sy2*f42;
1722 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
a9814c09 1723
1724 UInt_t index=r1.GetIndex(is);
1725
1726 AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
1727
1728 Int_t rc=FollowProlongation(*track, i2);
1729
1730 if ((rc < 1) ||
1731 (track->GetNumberOfClusters() <
029cd327 1732 (outer-inner)*fgkMinClustersInSeed)) delete track;
a9814c09 1733 else {
1734 fSeeds->AddLast(track); fNseeds++;
e24ea474 1735// cerr<<"\r found seed "<<fNseeds;
a9814c09 1736 }
5443e65e 1737 }
1738 }
1739 }
1740}
1741
1742//_____________________________________________________________________________
b7a0917f 1743Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree) const
5443e65e 1744{
1745 //
a819a5f7 1746 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
1747 // from the file. The names of the cluster tree and branches
1748 // should match the ones used in AliTRDclusterizer::WriteClusters()
1749 //
029cd327 1750 TObjArray *clusterArray = new TObjArray(400);
5443e65e 1751
c630aafd 1752 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
1753 if (!branch) {
1754 Error("ReadClusters","Can't get the branch !");
1755 return 1;
1756 }
029cd327 1757 branch->SetAddress(&clusterArray);
5443e65e 1758
1759 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
19dd5b2f 1760 // printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
a819a5f7 1761
a819a5f7 1762 // Loop through all entries in the tree
eb187bed 1763 Int_t nbytes = 0;
a819a5f7 1764 AliTRDcluster *c = 0;
7bed16a7 1765 // printf("\n");
a819a5f7 1766
1767 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
1768
1769 // Import the tree
5443e65e 1770 nbytes += ClusterTree->GetEvent(iEntry);
1771
a819a5f7 1772 // Get the number of points in the detector
029cd327 1773 Int_t nCluster = clusterArray->GetEntriesFast();
e24ea474 1774// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 1775
a819a5f7 1776 // Loop through all TRD digits
1777 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 1778 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
a819a5f7 1779 AliTRDcluster *co = new AliTRDcluster(*c);
1780 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
5443e65e 1781 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 1782 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
1783 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
a819a5f7 1784 array->AddLast(co);
029cd327 1785 delete clusterArray->RemoveAt(iCluster);
a819a5f7 1786 }
1787 }
1788
029cd327 1789 delete clusterArray;
5443e65e 1790
c630aafd 1791 return 0;
a819a5f7 1792}
1793
46d29e70 1794//__________________________________________________________________
029cd327 1795void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
1796{
1797 //
1798 // This cooks a label. Mmmmh, smells good...
1799 //
46d29e70 1800
1801 Int_t label=123456789, index, i, j;
5443e65e 1802 Int_t ncl=pt->GetNumberOfClusters();
029cd327 1803 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
5443e65e 1804
029cd327 1805 Bool_t labelAdded;
46d29e70 1806
029cd327 1807 // Int_t s[kRange][2];
1808 Int_t **s = new Int_t* [kRange];
1809 for (i=0; i<kRange; i++) {
d1b06c24 1810 s[i] = new Int_t[2];
1811 }
029cd327 1812 for (i=0; i<kRange; i++) {
46d29e70 1813 s[i][0]=-1;
1814 s[i][1]=0;
1815 }
1816
1817 Int_t t0,t1,t2;
1818 for (i=0; i<ncl; i++) {
5443e65e 1819 index=pt->GetClusterIndex(i);
46d29e70 1820 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
5443e65e 1821 t0=c->GetLabel(0);
1822 t1=c->GetLabel(1);
1823 t2=c->GetLabel(2);
46d29e70 1824 }
1825
1826 for (i=0; i<ncl; i++) {
5443e65e 1827 index=pt->GetClusterIndex(i);
46d29e70 1828 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
1829 for (Int_t k=0; k<3; k++) {
5443e65e 1830 label=c->GetLabel(k);
029cd327 1831 labelAdded=kFALSE; j=0;
46d29e70 1832 if (label >= 0) {
029cd327 1833 while ( (!labelAdded) && ( j < kRange ) ) {
a9814c09 1834 if (s[j][0]==label || s[j][1]==0) {
1835 s[j][0]=label;
1836 s[j][1]=s[j][1]+1;
029cd327 1837 labelAdded=kTRUE;
a9814c09 1838 }
1839 j++;
1840 }
46d29e70 1841 }
1842 }
1843 }
1844
46d29e70 1845 Int_t max=0;
1846 label = -123456789;
1847
029cd327 1848 for (i=0; i<kRange; i++) {
46d29e70 1849 if (s[i][1]>max) {
1850 max=s[i][1]; label=s[i][0];
1851 }
1852 }
5443e65e 1853
029cd327 1854 for (i=0; i<kRange; i++) {
5443e65e 1855 delete []s[i];
1856 }
1857
d1b06c24 1858 delete []s;
5443e65e 1859
1860 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
1861
1862 pt->SetLabel(label);
1863
46d29e70 1864}
1865
c630aafd 1866
5443e65e 1867//__________________________________________________________________
029cd327 1868void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
1869{
1870 //
1871 // Use clusters, but don't abuse them!
1872 //
1873
5443e65e 1874 Int_t ncl=t->GetNumberOfClusters();
1875 for (Int_t i=from; i<ncl; i++) {
1876 Int_t index = t->GetClusterIndex(i);
1877 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
1878 c->Use();
1879 }
1880}
1881
1882
1883//_____________________________________________________________________
029cd327 1884Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
5443e65e 1885{
1886 // Parametrised "expected" error of the cluster reconstruction in Y
1887
1888 Double_t s = 0.08 * 0.08;
1889 return s;
1890}
1891
1892//_____________________________________________________________________
029cd327 1893Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
0a29d0f1 1894{
5443e65e 1895 // Parametrised "expected" error of the cluster reconstruction in Z
1896
a9814c09 1897 Double_t s = 9 * 9 /12.;
5443e65e 1898 return s;
1899}
1900
5443e65e 1901//_____________________________________________________________________
029cd327 1902Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
5443e65e 1903{
1904 //
029cd327 1905 // Returns radial position which corresponds to time bin <localTB>
5443e65e 1906 // in tracking sector <sector> and plane <plane>
1907 //
1908
029cd327 1909 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
5443e65e 1910 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
1911 return fTrSec[sector]->GetLayer(pl)->GetX();
1912
1913}
1914
c630aafd 1915
5443e65e 1916//_______________________________________________________
1917AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
029cd327 1918 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
5443e65e 1919{
0a29d0f1 1920 //
5443e65e 1921 // AliTRDpropagationLayer constructor
0a29d0f1 1922 //
46d29e70 1923
029cd327 1924 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
1925 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
5443e65e 1926
46d29e70 1927
029cd327 1928 for(Int_t i=0; i < (Int_t) kZones; i++) {
5443e65e 1929 fZc[i]=0; fZmax[i] = 0;
a819a5f7 1930 }
5443e65e 1931
1932 fYmax = 0;
1933
1934 if(fTimeBinIndex >= 0) {
029cd327 1935 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
1936 fIndex = new UInt_t[kMaxClusterPerTimeBin];
a819a5f7 1937 }
46d29e70 1938
3c625a9b 1939 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
5443e65e 1940 fHole = kFALSE;
1941 fHoleZc = 0;
1942 fHoleZmax = 0;
1943 fHoleYc = 0;
1944 fHoleYmax = 0;
1945 fHoleRho = 0;
1946 fHoleX0 = 0;
1947
1948}
1949
1950//_______________________________________________________
1951void AliTRDtracker::AliTRDpropagationLayer::SetHole(
a9814c09 1952 Double_t Zmax, Double_t Ymax, Double_t rho,
029cd327 1953 Double_t radLength, Double_t Yc, Double_t Zc)
5443e65e 1954{
1955 //
1956 // Sets hole in the layer
1957 //
5443e65e 1958 fHole = kTRUE;
1959 fHoleZc = Zc;
1960 fHoleZmax = Zmax;
1961 fHoleYc = Yc;
1962 fHoleYmax = Ymax;
1963 fHoleRho = rho;
029cd327 1964 fHoleX0 = radLength;
5443e65e 1965}
1966
46d29e70 1967
5443e65e 1968//_______________________________________________________
1969AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
1970{
1971 //
1972 // AliTRDtrackingSector Constructor
1973 //
1974
1975 fGeom = geo;
1976 fPar = par;
1977 fGeomSector = gs;
1978 fTzeroShift = 0.13;
1979 fN = 0;
3c625a9b 1980 //
1981 // get holes description from geometry
1982 Bool_t holes[AliTRDgeometry::kNcham];
1983 //printf("sector\t%d\t",gs);
1984 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
1985 holes[icham] = fGeom->IsHole(0,icham,gs);
1986 //printf("%d",holes[icham]);
1987 }
1988 //printf("\n");
1989
029cd327 1990 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
5443e65e 1991
1992
1993 AliTRDpropagationLayer* ppl;
1994
029cd327 1995 Double_t x, xin, xout, dx, rho, radLength;
5443e65e 1996 Int_t steps;
46d29e70 1997
5443e65e 1998 // set time bins in the gas of the TPC
46d29e70 1999
5443e65e 2000 xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
029cd327 2001 rho = 0.9e-3; radLength = 28.94;
5443e65e 2002
2003 for(Int_t i=0; i<steps; i++) {
2004 x = xin + i*dx + dx/2;
029cd327 2005 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2006 InsertLayer(ppl);
46d29e70 2007 }
2008
5443e65e 2009 // set time bins in the outer field cage vessel
46d29e70 2010
029cd327 2011 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2012 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2013 InsertLayer(ppl);
46d29e70 2014
029cd327 2015 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2016 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2017 InsertLayer(ppl);
2018
029cd327 2019 dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2020 steps = 5; dx = (xout - xin)/steps;
2021 for(Int_t i=0; i<steps; i++) {
2022 x = xin + i*dx + dx/2;
029cd327 2023 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2024 InsertLayer(ppl);
2025 }
2026
029cd327 2027 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2028 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2029 InsertLayer(ppl);
2030
029cd327 2031 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2032 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2033 InsertLayer(ppl);
0a29d0f1 2034
5443e65e 2035
2036 // set time bins in CO2
2037
2038 xin = xout; xout = 275.0;
2039 steps = 50; dx = (xout - xin)/steps;
029cd327 2040 rho = 1.977e-3; radLength = 36.2;
5443e65e 2041
2042 for(Int_t i=0; i<steps; i++) {
2043 x = xin + i*dx + dx/2;
029cd327 2044 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2045 InsertLayer(ppl);
2046 }
2047
2048 // set time bins in the outer containment vessel
2049
029cd327 2050 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2051 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2052 InsertLayer(ppl);
2053
029cd327 2054 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2055 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2056 InsertLayer(ppl);
2057
029cd327 2058 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2059 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2060 InsertLayer(ppl);
2061
029cd327 2062 dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2063 steps = 10; dx = (xout - xin)/steps;
2064 for(Int_t i=0; i<steps; i++) {
2065 x = xin + i*dx + dx/2;
029cd327 2066 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2067 InsertLayer(ppl);
2068 }
2069
029cd327 2070 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2071 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2072 InsertLayer(ppl);
2073
029cd327 2074 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2075 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2076 InsertLayer(ppl);
2077
029cd327 2078 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2079 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2080 InsertLayer(ppl);
2081
2082 Double_t xtrd = (Double_t) fGeom->Rmin();
2083
2084 // add layers between TPC and TRD (Air temporarily)
2085 xin = xout; xout = xtrd;
2086 steps = 50; dx = (xout - xin)/steps;
029cd327 2087 rho = 1.2e-3; radLength = 36.66;
5443e65e 2088
2089 for(Int_t i=0; i<steps; i++) {
2090 x = xin + i*dx + dx/2;
029cd327 2091 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2092 InsertLayer(ppl);
2093 }
2094
2095
3c625a9b 2096 // Double_t alpha=AliTRDgeometry::GetAlpha();
5443e65e 2097
2098 // add layers for each of the planes
2099
2100 Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
2101 Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
2102 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2103 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2104 Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
2105 Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
2106 Double_t dxPlane = dxTEC + dxSpace;
2107
029cd327 2108 Int_t tb, tbIndex;
2109 const Int_t kNchambers = AliTRDgeometry::Ncham();
3c625a9b 2110 Double_t ymax = 0;
2111 //, holeYmax = 0;
2112 Double_t ymaxsensitive=0;
029cd327 2113 Double_t *zc = new Double_t[kNchambers];
2114 Double_t *zmax = new Double_t[kNchambers];
3c625a9b 2115 Double_t *zmaxsensitive = new Double_t[kNchambers];
2116 // Double_t holeZmax = 1000.; // the whole sector is missing
5443e65e 2117
5443e65e 2118 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3c625a9b 2119 //
5443e65e 2120 // Radiator
2121 xin = xtrd + plane * dxPlane; xout = xin + dxRad;
029cd327 2122 steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2123 for(Int_t i=0; i<steps; i++) {
2124 x = xin + i*dx + dx/2;
3c625a9b 2125 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2126 InsertLayer(ppl);
2127 }
2128
3c625a9b 2129 ymax = fGeom->GetChamberWidth(plane)/2.;
2130 ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
2131
029cd327 2132 for(Int_t ch = 0; ch < kNchambers; ch++) {
2133 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
5443e65e 2134 Float_t pad = fPar->GetRowPadSize(plane,ch,0);
2135 Float_t row0 = fPar->GetRow0(plane,ch,0);
2136 Int_t nPads = fPar->GetRowMax(plane,ch,0);
857b3eb0 2137 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
3c625a9b 2138 // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
2139 zc[ch] = (pad * nPads)/2 + row0;
2140 //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
2141
5443e65e 2142 }
2143
2144 dx = fPar->GetTimeBinSize();
029cd327 2145 rho = 0.00295 * 0.85; radLength = 11.0;
5443e65e 2146
2147 Double_t x0 = (Double_t) fPar->GetTime0(plane);
2148 Double_t xbottom = x0 - dxDrift;
2149 Double_t xtop = x0 + dxAmp;
3c625a9b 2150 //
5443e65e 2151 // Amplification region
5443e65e 2152 steps = (Int_t) (dxAmp/dx);
2153
2154 for(tb = 0; tb < steps; tb++) {
2155 x = x0 + tb * dx + dx/2;
029cd327 2156 tbIndex = CookTimeBinIndex(plane, -tb-1);
2157 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2158 ppl->SetYmax(ymax,ymaxsensitive);
2159 ppl->SetZ(zc, zmax, zmaxsensitive);
2160 ppl->SetHoles(holes);
5443e65e 2161 InsertLayer(ppl);
2162 }
029cd327 2163 tbIndex = CookTimeBinIndex(plane, -steps);
5443e65e 2164 x = (x + dx/2 + xtop)/2;
2165 dx = 2*(xtop-x);
029cd327 2166 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2167 ppl->SetYmax(ymax,ymaxsensitive);
2168 ppl->SetZ(zc, zmax,zmaxsensitive);
2169 ppl->SetHoles(holes);
5443e65e 2170 InsertLayer(ppl);
2171
2172 // Drift region
2173 dx = fPar->GetTimeBinSize();
2174 steps = (Int_t) (dxDrift/dx);
2175
2176 for(tb = 0; tb < steps; tb++) {
2177 x = x0 - tb * dx - dx/2;
029cd327 2178 tbIndex = CookTimeBinIndex(plane, tb);
5443e65e 2179
029cd327 2180 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2181 ppl->SetYmax(ymax,ymaxsensitive);
2182 ppl->SetZ(zc, zmax, zmaxsensitive);
2183 ppl->SetHoles(holes);
5443e65e 2184 InsertLayer(ppl);
2185 }
029cd327 2186 tbIndex = CookTimeBinIndex(plane, steps);
5443e65e 2187 x = (x - dx/2 + xbottom)/2;
2188 dx = 2*(x-xbottom);
029cd327 2189 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2190 ppl->SetYmax(ymax,ymaxsensitive);
2191 ppl->SetZ(zc, zmax, zmaxsensitive);
2192 ppl->SetHoles(holes);
5443e65e 2193 InsertLayer(ppl);
2194
2195 // Pad Plane
029cd327 2196 xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
2197 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3c625a9b 2198 ppl->SetYmax(ymax,ymaxsensitive);
2199 ppl->SetZ(zc, zmax,zmax);
2200 ppl->SetHoles(holes);
5443e65e 2201 InsertLayer(ppl);
2202
2203 // Rohacell
2204 xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
029cd327 2205 steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2206 for(Int_t i=0; i<steps; i++) {
2207 x = xin + i*dx + dx/2;
029cd327 2208 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3c625a9b 2209 ppl->SetYmax(ymax,ymaxsensitive);
2210 ppl->SetZ(zc, zmax,zmax);
2211 ppl->SetHoles(holes);
5443e65e 2212 InsertLayer(ppl);
2213 }
2214
2215 // Space between the chambers, air
2216 xin = xout; xout = xtrd + (plane + 1) * dxPlane;
029cd327 2217 steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2218 for(Int_t i=0; i<steps; i++) {
2219 x = xin + i*dx + dx/2;
029cd327 2220 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2221 InsertLayer(ppl);
2222 }
2223 }
2224
2225 // Space between the TRD and RICH
2226 Double_t xRICH = 500.;
2227 xin = xout; xout = xRICH;
029cd327 2228 steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2229 for(Int_t i=0; i<steps; i++) {
2230 x = xin + i*dx + dx/2;
029cd327 2231 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2232 InsertLayer(ppl);
2233 }
2234
2235 MapTimeBinLayers();
029cd327 2236 delete [] zc;
2237 delete [] zmax;
5443e65e 2238
2239}
2240
2241//______________________________________________________
2242
029cd327 2243Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
5443e65e 2244{
2245 //
2246 // depending on the digitization parameters calculates "global"
029cd327 2247 // time bin index for timebin <localTB> in plane <plane>
5443e65e 2248 //
2249
2250 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2251 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2252 Double_t dx = (Double_t) fPar->GetTimeBinSize();
2253
2254 Int_t tbAmp = fPar->GetTimeBefore();
2255 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 2256 if(kTRUE) maxAmp = 0; // intentional until we change parameter class
5443e65e 2257 Int_t tbDrift = fPar->GetTimeMax();
2258 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
2259
029cd327 2260 Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
5443e65e 2261
029cd327 2262 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
5443e65e 2263
029cd327 2264 if((localTB < 0) &&
2265 (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
2266 if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
5443e65e 2267
2268 return gtb;
2269
2270
2271}
2272
2273//______________________________________________________
2274
2275void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2276{
2277 //
2278 // For all sensitive time bins sets corresponding layer index
2279 // in the array fTimeBins
2280 //
2281
2282 Int_t index;
2283
2284 for(Int_t i = 0; i < fN; i++) {
2285 index = fLayers[i]->GetTimeBinIndex();
2286
2287 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2288
2289 if(index < 0) continue;
029cd327 2290 if(index >= (Int_t) kMaxTimeBinIndex) {
5443e65e 2291 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2292 printf(" index %d exceeds allowed maximum of %d!\n",
029cd327 2293 index, kMaxTimeBinIndex-1);
5443e65e 2294 continue;
2295 }
2296 fTimeBinIndex[index] = i;
2297 }
2298
2299 Double_t x1, dx1, x2, dx2, gap;
2300
2301 for(Int_t i = 0; i < fN-1; i++) {
2302 x1 = fLayers[i]->GetX();
2303 dx1 = fLayers[i]->GetdX();
2304 x2 = fLayers[i+1]->GetX();
2305 dx2 = fLayers[i+1]->GetdX();
2306 gap = (x2 - dx2/2) - (x1 + dx1/2);
2307 if(gap < -0.01) {
2308 printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
2309 printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
2310 }
2311 if(gap > 0.01) {
2312 printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
2313 printf(" (%f - %f) - (%f + %f) = %f\n",
a9814c09 2314 x2, dx2/2, x1, dx1, gap);
5443e65e 2315 }
2316 }
2317}
2318
2319
2320//______________________________________________________
2321
2322
2323Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2324{
2325 //
2326 // Returns the number of time bin which in radial position is closest to <x>
2327 //
2328
2329 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2330 if(x <= fLayers[0]->GetX()) return 0;
2331
2332 Int_t b=0, e=fN-1, m=(b+e)/2;
2333 for (; b<e; m=(b+e)/2) {
2334 if (x > fLayers[m]->GetX()) b=m+1;
2335 else e=m;
2336 }
2337 if(TMath::Abs(x - fLayers[m]->GetX()) >
2338 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2339 else return m;
2340
2341}
2342
2343//______________________________________________________
2344
2345Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2346{
2347 //
2348 // Returns number of the innermost SENSITIVE propagation layer
2349 //
2350
2351 return GetLayerNumber(0);
2352}
2353
2354//______________________________________________________
2355
2356Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2357{
2358 //
2359 // Returns number of the outermost SENSITIVE time bin
2360 //
2361
2362 return GetLayerNumber(GetNumberOfTimeBins() - 1);
46d29e70 2363}
2364
5443e65e 2365//______________________________________________________
2366
2367Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2368{
2369 //
2370 // Returns number of SENSITIVE time bins
2371 //
2372
2373 Int_t tb, layer;
029cd327 2374 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
5443e65e 2375 layer = GetLayerNumber(tb);
2376 if(layer>=0) break;
2377 }
2378 return tb+1;
2379}
2380
2381//______________________________________________________
2382
2383void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2384{
2385 //
2386 // Insert layer <pl> in fLayers array.
2387 // Layers are sorted according to X coordinate.
2388
029cd327 2389 if ( fN == ((Int_t) kMaxLayersPerSector)) {
5443e65e 2390 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2391 return;
2392 }
2393 if (fN==0) {fLayers[fN++] = pl; return;}
2394 Int_t i=Find(pl->GetX());
2395
2396 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2397 fLayers[i]=pl; fN++;
2398
2399}
2400
2401//______________________________________________________
2402
2403Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2404{
2405 //
2406 // Returns index of the propagation layer nearest to X
2407 //
2408
2409 if (x <= fLayers[0]->GetX()) return 0;
2410 if (x > fLayers[fN-1]->GetX()) return fN;
2411 Int_t b=0, e=fN-1, m=(b+e)/2;
2412 for (; b<e; m=(b+e)/2) {
2413 if (x > fLayers[m]->GetX()) b=m+1;
2414 else e=m;
2415 }
2416 return m;
2417}
2418
3c625a9b 2419//______________________________________________________
2420void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2421{
2422 //
2423 // set centers and the width of sectors
2424 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2425 fZc[icham] = center[icham];
2426 fZmax[icham] = w[icham];
2427 fZmaxSensitive[icham] = wsensitive[icham];
2428 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2429 }
2430}
5443e65e 2431//______________________________________________________
2432
3c625a9b 2433void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2434{
2435 //
2436 // set centers and the width of sectors
2437 fHole = kFALSE;
2438 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2439 fIsHole[icham] = holes[icham];
2440 if (holes[icham]) fHole = kTRUE;
2441 }
2442}
2443
2444
2445
5443e65e 2446void AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
029cd327 2447 Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
a9814c09 2448 Bool_t &lookForCluster) const
5443e65e 2449{
2450 //
029cd327 2451 // Returns radial step <dx>, density <rho>, rad. length <radLength>,
5443e65e 2452 // and sensitivity <lookForCluster> in point <y,z>
2453 //
2454
2455 dx = fdX;
2456 rho = fRho;
029cd327 2457 radLength = fX0;
5443e65e 2458 lookForCluster = kFALSE;
3c625a9b 2459 //
2460 // check dead regions in sensitive volume
5443e65e 2461 if(fTimeBinIndex >= 0) {
3c625a9b 2462 //
2463 Int_t zone=-1;
029cd327 2464 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3c625a9b 2465 if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
2466 zone = ch;
2467 lookForCluster = !(fIsHole[zone]);
2468 if(TMath::Abs(y) > fYmaxSensitive){
2469 lookForCluster = kFALSE;
2470 }
2471 if (fIsHole[zone]) {
2472 //if hole
2473 rho = 1.29e-3;
2474 radLength = 36.66;
2475 }
2476 }
5443e65e 2477 }
3c625a9b 2478 return;
5443e65e 2479 }
3c625a9b 2480 //
2481 //
5443e65e 2482 // check hole
3c625a9b 2483 if (fHole==kFALSE) return;
2484 //
2485 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2486 if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
2487 if (fIsHole[ch]) {
2488 //if hole
2489 rho = 1.29e-3;
2490 radLength = 36.66;
2491 }
2492 }
2493 }
5443e65e 2494 return;
2495}
2496
3c625a9b 2497Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
2498{
2499 //
2500 //
2501 if (fTimeBinIndex < 0) return -20; //unknown
2502 Int_t zone=-10; // dead zone
2503 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2504 if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
2505 zone = ch;
2506 }
2507 return zone;
2508}
2509
2510
5443e65e 2511//______________________________________________________
2512
2513void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
a9814c09 2514 UInt_t index) {
5443e65e 2515
2516// Insert cluster in cluster array.
2517// Clusters are sorted according to Y coordinate.
2518
2519 if(fTimeBinIndex < 0) {
2520 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
2521 return;
2522 }
2523
029cd327 2524 if (fN== (Int_t) kMaxClusterPerTimeBin) {
5443e65e 2525 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
2526 return;
2527 }
2528 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
2529 Int_t i=Find(c->GetY());
2530 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
2531 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
2532 fIndex[i]=index; fClusters[i]=c; fN++;
2533}
2534
2535//______________________________________________________
2536
2537Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const {
2538
2539// Returns index of the cluster nearest in Y
2540
2541 if (y <= fClusters[0]->GetY()) return 0;
2542 if (y > fClusters[fN-1]->GetY()) return fN;
2543 Int_t b=0, e=fN-1, m=(b+e)/2;
2544 for (; b<e; m=(b+e)/2) {
2545 if (y > fClusters[m]->GetY()) b=m+1;
2546 else e=m;
2547 }
2548 return m;
2549}
2550
fd621f36 2551//---------------------------------------------------------
5443e65e 2552
fd621f36 2553Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
2554//
2555// Returns correction factor for tilted pads geometry
2556//
5443e65e 2557
fd621f36 2558 Double_t h01 = sin(TMath::Pi() / 180.0 * fPar->GetTiltingAngle());
2559 Int_t det = c->GetDetector();
2560 Int_t plane = fGeom->GetPlane(det);
b3a5a838 2561
c5a8e3df 2562 //if((plane == 1) || (plane == 3) || (plane == 5)) h01=-h01;
2563 if((plane == 0) || (plane == 2) || (plane == 4)) h01=-h01;
b8dc2353 2564
2565 if(fNoTilt) h01 = 0;
fd621f36 2566
2567 return h01;
2568}
5443e65e 2569
c630aafd 2570
2571
2572
2573
2574