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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"
32#include "AliTRDgeometryDetail.h"
3c625a9b 33#include "AliTRDgeometryHole.h"
46d29e70 34#include "AliTRDcluster.h"
35#include "AliTRDtrack.h"
c630aafd 36#include "AliTRDPartID.h"
5443e65e 37#include "../TPC/AliTPCtrack.h"
46d29e70 38
39#include "AliTRDtracker.h"
40
41ClassImp(AliTRDtracker)
42
029cd327 43 const Float_t AliTRDtracker::fgkSeedDepth = 0.5;
44 const Float_t AliTRDtracker::fgkSeedStep = 0.10;
45 const Float_t AliTRDtracker::fgkSeedGap = 0.25;
5443e65e 46
029cd327 47 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ12 = 40.;
48 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ = 25.;
49 const Float_t AliTRDtracker::fgkMaxSeedC = 0.0052;
50 const Float_t AliTRDtracker::fgkMaxSeedTan = 1.2;
51 const Float_t AliTRDtracker::fgkMaxSeedVertexZ = 150.;
a819a5f7 52
029cd327 53 const Double_t AliTRDtracker::fgkSeedErrorSY = 0.2;
54 const Double_t AliTRDtracker::fgkSeedErrorSY3 = 2.5;
55 const Double_t AliTRDtracker::fgkSeedErrorSZ = 0.1;
bbf92647 56
029cd327 57 const Float_t AliTRDtracker::fgkMinClustersInSeed = 0.7;
bbf92647 58
029cd327 59 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
60 const Float_t AliTRDtracker::fgkMinFractionOfFoundClusters = 0.8;
bbf92647 61
029cd327 62 const Float_t AliTRDtracker::fgkSkipDepth = 0.3;
63 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
64 const Float_t AliTRDtracker::fgkWideRoad = 20.;
5443e65e 65
029cd327 66 const Double_t AliTRDtracker::fgkMaxChi2 = 12.;
a819a5f7 67
029cd327 68const Int_t AliTRDtracker::fgkFirstPlane = 5;
69const Int_t AliTRDtracker::fgkLastPlane = 17;
9c9d2487 70
bbf92647 71
89f05372 72//____________________________________________________________________
73AliTRDtracker::AliTRDtracker():AliTracker(),
74 fGeom(0),
75 fPar(0),
76 fNclusters(0),
77 fClusters(0),
78 fNseeds(0),
79 fSeeds(0),
80 fNtracks(0),
81 fTracks(0),
82 fSY2corr(0),
83 fSZ2corr(0),
84 fTimeBinsPerPlane(0),
85 fMaxGap(0),
86 fVocal(kFALSE),
87 fAddTRDseeds(kFALSE),
88 fNoTilt(kFALSE)
89{
90 for(Int_t i=0;i<kTrackingSectors;i++) fTrSec[i]=0;
91 for(Int_t j=0;j<5;j++)
92 for(Int_t k=0;k<18;k++) fHoles[j][k]=kFALSE;
93}
46d29e70 94//____________________________________________________________________
c630aafd 95AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker()
46d29e70 96{
5443e65e 97 //
98 // Main constructor
99 //
46d29e70 100
c630aafd 101 //Float_t fTzero = 0;
b8dc2353 102
5443e65e 103 fAddTRDseeds = kFALSE;
5443e65e 104 fGeom = NULL;
b8dc2353 105 fNoTilt = kFALSE;
5443e65e 106
107 TDirectory *savedir=gDirectory;
108 TFile *in=(TFile*)geomfile;
109 if (!in->IsOpen()) {
110 printf("AliTRDtracker::AliTRDtracker(): geometry file is not open!\n");
111 printf(" DETAIL TRD geometry and DEFAULT TRD parameter will be used\n");
112 }
113 else {
114 in->cd();
c630aafd 115// in->ls();
5443e65e 116 fGeom = (AliTRDgeometry*) in->Get("TRDgeometry");
117 fPar = (AliTRDparameter*) in->Get("TRDparameter");
c630aafd 118// fGeom->Dump();
5443e65e 119 }
46d29e70 120
5443e65e 121 if(fGeom) {
122 // fTzero = geo->GetT0();
b8dc2353 123 printf("Found geometry version %d on file \n", fGeom->IsVersion());
5443e65e 124 }
125 else {
c630aafd 126 printf("AliTRDtracker::AliTRDtracker(): can't find TRD geometry!\n");
3c625a9b 127 //printf("The DETAIL TRD geometry will be used\n");
128 //fGeom = new AliTRDgeometryDetail();
129 fGeom = new AliTRDgeometryHole();
130 fGeom->SetPHOShole();
131 fGeom->SetRICHhole();
c630aafd 132 }
133
134 if (!fPar) {
135 printf("AliTRDtracker::AliTRDtracker(): can't find TRD parameter!\n");
136 printf("The DEFAULT TRD parameter will be used\n");
5443e65e 137 fPar = new AliTRDparameter();
138 }
c630aafd 139 fPar->ReInit();
5443e65e 140
141 savedir->cd();
46d29e70 142
5443e65e 143
144 // fGeom->SetT0(fTzero);
0a29d0f1 145
46d29e70 146 fNclusters = 0;
147 fClusters = new TObjArray(2000);
148 fNseeds = 0;
5443e65e 149 fSeeds = new TObjArray(2000);
46d29e70 150 fNtracks = 0;
5443e65e 151 fTracks = new TObjArray(1000);
a819a5f7 152
029cd327 153 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
154 Int_t trS = CookSectorIndex(geomS);
155 fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS, fPar);
3c625a9b 156 for (Int_t icham=0;icham<AliTRDgeometry::kNcham; icham++){
157 fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS);
158 }
5443e65e 159 }
a819a5f7 160
029cd327 161 Float_t tiltAngle = TMath::Abs(fPar->GetTiltingAngle());
162 if(tiltAngle < 0.1) {
b8dc2353 163 fNoTilt = kTRUE;
164 }
165
166 fSY2corr = 0.2;
167 fSZ2corr = 120.;
168
029cd327 169 if(fNoTilt && (tiltAngle > 0.1)) fSY2corr = fSY2corr + tiltAngle * 0.05;
b8dc2353 170
bbf92647 171
5443e65e 172 // calculate max gap on track
a819a5f7 173
5443e65e 174 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
175 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
a819a5f7 176
5443e65e 177 Double_t dx = (Double_t) fPar->GetTimeBinSize();
178 Int_t tbAmp = fPar->GetTimeBefore();
179 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 180 if(kTRUE) maxAmp = 0; // intentional until we change the parameter class
5443e65e 181 Int_t tbDrift = fPar->GetTimeMax();
182 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
a819a5f7 183
5443e65e 184 tbDrift = TMath::Min(tbDrift,maxDrift);
185 tbAmp = TMath::Min(tbAmp,maxAmp);
46d29e70 186
5443e65e 187 fTimeBinsPerPlane = tbAmp + tbDrift;
029cd327 188 fMaxGap = (Int_t) (fTimeBinsPerPlane * fGeom->Nplan() * fgkSkipDepth);
46d29e70 189
5443e65e 190 fVocal = kFALSE;
0a29d0f1 191
9c9d2487 192
193 // Barrel Tracks [SR, 03.04.2003]
194
195 fBarrelFile = 0;
196 fBarrelTree = 0;
197 fBarrelArray = 0;
198 fBarrelTrack = 0;
199
200 savedir->cd();
5443e65e 201}
46d29e70 202
5443e65e 203//___________________________________________________________________
204AliTRDtracker::~AliTRDtracker()
46d29e70 205{
029cd327 206 //
207 // Destructor of AliTRDtracker
208 //
209
89f05372 210 if (fClusters) {
211 fClusters->Delete();
212 delete fClusters;
213 }
214 if (fTracks) {
215 fTracks->Delete();
216 delete fTracks;
217 }
218 if (fSeeds) {
219 fSeeds->Delete();
220 delete fSeeds;
221 }
5443e65e 222 delete fGeom;
223 delete fPar;
0a29d0f1 224
029cd327 225 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
226 delete fTrSec[geomS];
5443e65e 227 }
228}
46d29e70 229
9c9d2487 230//_____________________________________________________________________
231
232void AliTRDtracker::SetBarrelTree(const char *mode) {
233 //
234 //
235 //
236
237 if (!IsStoringBarrel()) return;
238
239 TDirectory *sav = gDirectory;
240 if (!fBarrelFile) fBarrelFile = new TFile("AliBarrelTracks.root", "UPDATE");
241
242 char buff[40];
243 sprintf(buff, "BarrelTRD_%d_%s", GetEventNumber(), mode);
244
245 fBarrelFile->cd();
246 fBarrelTree = new TTree(buff, "Barrel TPC tracks");
247
029cd327 248 Int_t nRefs = fgkLastPlane - fgkFirstPlane + 1;
9c9d2487 249
250 if (!fBarrelArray) fBarrelArray = new TClonesArray("AliBarrelTrack", nRefs);
251 for(Int_t i=0; i<nRefs; i++) new((*fBarrelArray)[i]) AliBarrelTrack();
252
253 fBarrelTree->Branch("tracks", &fBarrelArray);
254 sav->cd();
255}
256
257//_____________________________________________________________________
258
259void AliTRDtracker::StoreBarrelTrack(AliTRDtrack *ps, Int_t refPlane, Int_t isIn) {
260 //
261 //
262 //
263
264 if (!IsStoringBarrel()) return;
265
266 static Int_t nClusters;
267 static Int_t nWrong;
268 static Double_t chi2;
269 static Int_t index;
270 static Bool_t wasLast = kTRUE;
271
272 Int_t newClusters, newWrong;
273 Double_t newChi2;
274
275 if (wasLast) {
276
277 fBarrelArray->Clear();
278 nClusters = nWrong = 0;
279 chi2 = 0.0;
280 index = 0;
281 wasLast = kFALSE;
282 }
283
284 fBarrelTrack = (AliBarrelTrack*)(*fBarrelArray)[index++];
285 ps->GetBarrelTrack(fBarrelTrack);
286
287 newClusters = ps->GetNumberOfClusters() - nClusters;
288 newWrong = ps->GetNWrong() - nWrong;
289 newChi2 = ps->GetChi2() - chi2;
290
291 nClusters = ps->GetNumberOfClusters();
292 nWrong = ps->GetNWrong();
293 chi2 = ps->GetChi2();
294
029cd327 295 if (refPlane != fgkLastPlane) {
9c9d2487 296 fBarrelTrack->SetNClusters(newClusters, newChi2);
297 fBarrelTrack->SetNWrongClusters(newWrong);
298 } else {
299 wasLast = kTRUE;
300 }
301
302 fBarrelTrack->SetRefPlane(refPlane, isIn);
303}
304
305//_____________________________________________________________________
306
307Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track) {
308 //
309 // Rotates the track when necessary
310 //
311
312 Double_t alpha = AliTRDgeometry::GetAlpha();
313 Double_t y = track->GetY();
314 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
315
c630aafd 316 //Int_t ns = AliTRDgeometry::kNsect;
9c9d2487 317 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
318
319 if (y > ymax) {
320 //s = (s+1) % ns;
321 if (!track->Rotate(alpha)) return kFALSE;
322 } else if (y <-ymax) {
323 //s = (s-1+ns) % ns;
324 if (!track->Rotate(-alpha)) return kFALSE;
325 }
326
327 return kTRUE;
328}
329
46d29e70 330//_____________________________________________________________________
5443e65e 331inline Double_t f1trd(Double_t x1,Double_t y1,
a9814c09 332 Double_t x2,Double_t y2,
333 Double_t x3,Double_t y3)
46d29e70 334{
0a29d0f1 335 //
46d29e70 336 // Initial approximation of the track curvature
0a29d0f1 337 //
46d29e70 338 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
339 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
340 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
341 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
342 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
343
344 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
345
346 return -xr*yr/sqrt(xr*xr+yr*yr);
347}
348
349//_____________________________________________________________________
5443e65e 350inline Double_t f2trd(Double_t x1,Double_t y1,
a9814c09 351 Double_t x2,Double_t y2,
352 Double_t x3,Double_t y3)
46d29e70 353{
0a29d0f1 354 //
5443e65e 355 // Initial approximation of the track curvature times X coordinate
356 // of the center of curvature
0a29d0f1 357 //
46d29e70 358
359 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
360 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
361 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
362 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
363 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
364
365 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
366
367 return -a/(d*y1-b)*xr/sqrt(xr*xr+yr*yr);
368}
369
370//_____________________________________________________________________
5443e65e 371inline Double_t f3trd(Double_t x1,Double_t y1,
a9814c09 372 Double_t x2,Double_t y2,
373 Double_t z1,Double_t z2)
46d29e70 374{
0a29d0f1 375 //
46d29e70 376 // Initial approximation of the tangent of the track dip angle
0a29d0f1 377 //
46d29e70 378
379 return (z1 - z2)/sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
380}
381
46e2d86c 382
383AliTRDcluster * AliTRDtracker::GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin){
384 //
385 //try to find cluster in the backup list
386 //
387 AliTRDcluster * cl =0;
388 UInt_t *indexes = track->GetBackupIndexes();
389 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
390 if (indexes[i]==0) break;
391 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
392 if (!cli) break;
393 if (cli->GetLocalTimeBin()!=timebin) continue;
394 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
395 if (iplane==plane) {
396 cl = cli;
397 break;
398 }
399 }
400 return cl;
401}
402
3c625a9b 403
404Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * track){
405 //
406 //return last updated plane
407 Int_t lastplane=0;
408 UInt_t *indexes = track->GetBackupIndexes();
409 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
410 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
411 if (!cli) break;
412 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
413 if (iplane>lastplane) {
414 lastplane = iplane;
415 }
416 }
417 return lastplane;
418}
46d29e70 419//___________________________________________________________________
5443e65e 420Int_t AliTRDtracker::Clusters2Tracks(const TFile *inp, TFile *out)
46d29e70 421{
0a29d0f1 422 //
5443e65e 423 // Finds tracks within the TRD. File <inp> is expected to contain seeds
424 // at the outer part of the TRD. If <inp> is NULL, the seeds
425 // are found within the TRD if fAddTRDseeds is TRUE.
426 // The tracks are propagated to the innermost time bin
427 // of the TRD and stored in file <out>.
0a29d0f1 428 //
a819a5f7 429
5443e65e 430 LoadEvent();
431
432 TDirectory *savedir=gDirectory;
a819a5f7 433
5443e65e 434 char tname[100];
a819a5f7 435
5443e65e 436 if (!out->IsOpen()) {
437 cerr<<"AliTRDtracker::Clusters2Tracks(): output file is not open !\n";
438 return 1;
439 }
46d29e70 440
e24ea474 441 sprintf(tname,"seedTRDtoTPC_%d",GetEventNumber());
029cd327 442 TTree tpcTree(tname,"Tree with seeds from TRD at outer TPC pad row");
5443e65e 443 AliTPCtrack *iotrack=0;
029cd327 444 tpcTree.Branch("tracks","AliTPCtrack",&iotrack,32000,0);
5443e65e 445
e24ea474 446 sprintf(tname,"TreeT%d_TRD",GetEventNumber());
029cd327 447 TTree trdTree(tname,"TRD tracks at inner TRD time bin");
448 AliTRDtrack *iotrackTRD=0;
449 trdTree.Branch("tracks","AliTRDtrack",&iotrackTRD,32000,0);
5443e65e 450
451 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
029cd327 452 Float_t foundMin = fgkMinClustersInTrack * timeBins;
5443e65e 453
454 if (inp) {
455 TFile *in=(TFile*)inp;
456 if (!in->IsOpen()) {
c630aafd 457 cerr<<
458 "AliTRDtracker::Clusters2Tracks(): file with seeds is not open !\n";
5443e65e 459 cerr<<" ... going for seeds finding inside the TRD\n";
460 }
461 else {
462 in->cd();
e24ea474 463 sprintf(tname,"TRDb_%d",GetEventNumber());
5443e65e 464 TTree *seedTree=(TTree*)in->Get(tname);
465 if (!seedTree) {
a9814c09 466 cerr<<"AliTRDtracker::Clusters2Tracks(): ";
467 cerr<<"can't get a tree with track seeds !\n";
468 return 3;
5443e65e 469 }
470 AliTRDtrack *seed=new AliTRDtrack;
471 seedTree->SetBranchAddress("tracks",&seed);
472
473 Int_t n=(Int_t)seedTree->GetEntries();
474 for (Int_t i=0; i<n; i++) {
a9814c09 475 seedTree->GetEvent(i);
476 seed->ResetCovariance();
477 AliTRDtrack *tr = new AliTRDtrack(*seed,seed->GetAlpha());
478 fSeeds->AddLast(tr);
479 fNseeds++;
5443e65e 480 }
481 delete seed;
fd621f36 482 delete seedTree;
5443e65e 483 }
484 }
46d29e70 485
5443e65e 486 out->cd();
46d29e70 487
fd621f36 488
5443e65e 489 // find tracks from loaded seeds
a819a5f7 490
5443e65e 491 Int_t nseed=fSeeds->GetEntriesFast();
492 Int_t i, found = 0;
493 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
494
495 for (i=0; i<nseed; i++) {
496 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
497 FollowProlongation(t, innerTB);
498 if (t.GetNumberOfClusters() >= foundMin) {
499 UseClusters(&t);
029cd327 500 CookLabel(pt, 1-fgkLabelFraction);
5443e65e 501 // t.CookdEdx();
502 }
029cd327 503 iotrackTRD = pt;
504 trdTree.Fill();
e24ea474 505 found++;
506// cout<<found<<'\r';
5443e65e 507
508 if(PropagateToTPC(t)) {
509 AliTPCtrack *tpc = new AliTPCtrack(*pt,pt->GetAlpha());
510 iotrack = tpc;
029cd327 511 tpcTree.Fill();
5443e65e 512 delete tpc;
513 }
514 delete fSeeds->RemoveAt(i);
515 fNseeds--;
516 }
a819a5f7 517
5443e65e 518 cout<<"Number of loaded seeds: "<<nseed<<endl;
519 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
a819a5f7 520
5443e65e 521 // after tracks from loaded seeds are found and the corresponding
522 // clusters are used, look for additional seeds from TRD
46d29e70 523
5443e65e 524 if(fAddTRDseeds) {
525 // Find tracks for the seeds in the TRD
526 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
527
029cd327 528 Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
529 Int_t gap = (Int_t) (timeBins * fgkSeedGap);
530 Int_t step = (Int_t) (timeBins * fgkSeedStep);
5443e65e 531
532 // make a first turn with tight cut on initial curvature
533 for(Int_t turn = 1; turn <= 2; turn++) {
534 if(turn == 2) {
029cd327 535 nSteps = (Int_t) (fgkSeedDepth / (3*fgkSeedStep));
536 step = (Int_t) (timeBins * (3*fgkSeedStep));
5443e65e 537 }
538 for(Int_t i=0; i<nSteps; i++) {
a9814c09 539 Int_t outer=timeBins-1-i*step;
540 Int_t inner=outer-gap;
46d29e70 541
a9814c09 542 nseed=fSeeds->GetEntriesFast();
5443e65e 543
a9814c09 544 MakeSeeds(inner, outer, turn);
5443e65e 545
a9814c09 546 nseed=fSeeds->GetEntriesFast();
547 printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
548 turn, i, nseed);
549
550 for (Int_t i=0; i<nseed; i++) {
551 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
552 FollowProlongation(t,innerTB);
553 if (t.GetNumberOfClusters() >= foundMin) {
554 UseClusters(&t);
029cd327 555 CookLabel(pt, 1-fgkLabelFraction);
a9814c09 556 t.CookdEdx();
c630aafd 557 found++;
e24ea474 558// cout<<found<<'\r';
029cd327 559 iotrackTRD = pt;
560 trdTree.Fill();
a9814c09 561 if(PropagateToTPC(t)) {
562 AliTPCtrack *tpc = new AliTPCtrack(*pt,pt->GetAlpha());
563 iotrack = tpc;
029cd327 564 tpcTree.Fill();
a9814c09 565 delete tpc;
566 }
567 }
568 delete fSeeds->RemoveAt(i);
569 fNseeds--;
570 }
46d29e70 571 }
5443e65e 572 }
573 }
029cd327 574 tpcTree.Write();
575 trdTree.Write();
5443e65e 576
577 cout<<"Total number of found tracks: "<<found<<endl;
578
579 UnloadEvent();
580
581 savedir->cd();
582
583 return 0;
584}
c630aafd 585
586//___________________________________________________________________
587Int_t AliTRDtracker::Clusters2Tracks(AliESD* event)
588{
589 //
590 // Finds tracks within the TRD. The ESD event is expected to contain seeds
591 // at the outer part of the TRD. The seeds
592 // are found within the TRD if fAddTRDseeds is TRUE.
593 // The tracks are propagated to the innermost time bin
594 // of the TRD and the ESD event is updated
595 //
596
597 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
029cd327 598 Float_t foundMin = fgkMinClustersInTrack * timeBins;
c630aafd 599 Int_t nseed = 0;
600 Int_t found = 0;
601 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
602
603 Int_t n = event->GetNumberOfTracks();
604 for (Int_t i=0; i<n; i++) {
605 AliESDtrack* seed=event->GetTrack(i);
606 ULong_t status=seed->GetStatus();
607 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
608 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
609 nseed++;
610
611 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
46e2d86c 612 //seed2->ResetCovariance();
c630aafd 613 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
614 AliTRDtrack &t=*pt;
615 FollowProlongation(t, innerTB);
616 if (t.GetNumberOfClusters() >= foundMin) {
617 UseClusters(&t);
029cd327 618 CookLabel(pt, 1-fgkLabelFraction);
c630aafd 619 // t.CookdEdx();
620 }
621 found++;
622// cout<<found<<'\r';
623
624 if(PropagateToTPC(t)) {
625 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
626 }
627 delete seed2;
628 delete pt;
629 }
630
631 cout<<"Number of loaded seeds: "<<nseed<<endl;
632 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
633
634 // after tracks from loaded seeds are found and the corresponding
635 // clusters are used, look for additional seeds from TRD
636
637 if(fAddTRDseeds) {
638 // Find tracks for the seeds in the TRD
639 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
640
029cd327 641 Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
642 Int_t gap = (Int_t) (timeBins * fgkSeedGap);
643 Int_t step = (Int_t) (timeBins * fgkSeedStep);
c630aafd 644
645 // make a first turn with tight cut on initial curvature
646 for(Int_t turn = 1; turn <= 2; turn++) {
647 if(turn == 2) {
029cd327 648 nSteps = (Int_t) (fgkSeedDepth / (3*fgkSeedStep));
649 step = (Int_t) (timeBins * (3*fgkSeedStep));
c630aafd 650 }
651 for(Int_t i=0; i<nSteps; i++) {
652 Int_t outer=timeBins-1-i*step;
653 Int_t inner=outer-gap;
654
655 nseed=fSeeds->GetEntriesFast();
656
657 MakeSeeds(inner, outer, turn);
658
659 nseed=fSeeds->GetEntriesFast();
660 printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
661 turn, i, nseed);
662
663 for (Int_t i=0; i<nseed; i++) {
664 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
665 FollowProlongation(t,innerTB);
666 if (t.GetNumberOfClusters() >= foundMin) {
667 UseClusters(&t);
029cd327 668 CookLabel(pt, 1-fgkLabelFraction);
c630aafd 669 t.CookdEdx();
670 found++;
671// cout<<found<<'\r';
672 if(PropagateToTPC(t)) {
673 AliESDtrack track;
674 track.UpdateTrackParams(pt,AliESDtrack::kTRDin);
675 event->AddTrack(&track);
676 }
677 }
678 delete fSeeds->RemoveAt(i);
679 fNseeds--;
680 }
681 }
682 }
683 }
684
685 cout<<"Total number of found tracks: "<<found<<endl;
686
687 return 0;
688}
5443e65e 689
c630aafd 690
5443e65e 691
692//_____________________________________________________________________________
693Int_t AliTRDtracker::PropagateBack(const TFile *inp, TFile *out) {
694 //
695 // Reads seeds from file <inp>. The seeds are AliTPCtrack's found and
696 // backpropagated by the TPC tracker. Each seed is first propagated
697 // to the TRD, and then its prolongation is searched in the TRD.
698 // If sufficiently long continuation of the track is found in the TRD
699 // the track is updated, otherwise it's stored as originaly defined
700 // by the TPC tracker.
701 //
702
5443e65e 703 LoadEvent();
704
705 TDirectory *savedir=gDirectory;
706
707 TFile *in=(TFile*)inp;
708
709 if (!in->IsOpen()) {
710 cerr<<"AliTRDtracker::PropagateBack(): ";
711 cerr<<"file with back propagated TPC tracks is not open !\n";
712 return 1;
713 }
714
715 if (!out->IsOpen()) {
716 cerr<<"AliTRDtracker::PropagateBack(): ";
717 cerr<<"file for back propagated TRD tracks is not open !\n";
718 return 2;
719 }
720
721 in->cd();
722 char tname[100];
e24ea474 723 sprintf(tname,"seedsTPCtoTRD_%d",GetEventNumber());
5443e65e 724 TTree *seedTree=(TTree*)in->Get(tname);
725 if (!seedTree) {
726 cerr<<"AliTRDtracker::PropagateBack(): ";
727 cerr<<"can't get a tree with seeds from TPC !\n";
728 cerr<<"check if your version of TPC tracker creates tree "<<tname<<"\n";
729 return 3;
730 }
46d29e70 731
5443e65e 732 AliTPCtrack *seed=new AliTPCtrack;
733 seedTree->SetBranchAddress("tracks",&seed);
734
735 Int_t n=(Int_t)seedTree->GetEntries();
736 for (Int_t i=0; i<n; i++) {
737 seedTree->GetEvent(i);
738 Int_t lbl = seed->GetLabel();
739 AliTRDtrack *tr = new AliTRDtrack(*seed,seed->GetAlpha());
740 tr->SetSeedLabel(lbl);
741 fSeeds->AddLast(tr);
742 fNseeds++;
743 }
a819a5f7 744
5443e65e 745 delete seed;
746 delete seedTree;
a819a5f7 747
5443e65e 748 out->cd();
a819a5f7 749
5443e65e 750 AliTPCtrack *otrack=0;
a819a5f7 751
e24ea474 752 sprintf(tname,"seedsTRDtoTOF1_%d",GetEventNumber());
5443e65e 753 TTree tofTree1(tname,"Tracks back propagated through TPC and TRD");
754 tofTree1.Branch("tracks","AliTPCtrack",&otrack,32000,0);
a819a5f7 755
e24ea474 756 sprintf(tname,"seedsTRDtoTOF2_%d",GetEventNumber());
5443e65e 757 TTree tofTree2(tname,"Tracks back propagated through TPC and TRD");
758 tofTree2.Branch("tracks","AliTPCtrack",&otrack,32000,0);
46d29e70 759
e24ea474 760 sprintf(tname,"seedsTRDtoPHOS_%d",GetEventNumber());
5443e65e 761 TTree phosTree(tname,"Tracks back propagated through TPC and TRD");
762 phosTree.Branch("tracks","AliTPCtrack",&otrack,32000,0);
a819a5f7 763
e24ea474 764 sprintf(tname,"seedsTRDtoRICH_%d",GetEventNumber());
5443e65e 765 TTree richTree(tname,"Tracks back propagated through TPC and TRD");
766 richTree.Branch("tracks","AliTPCtrack",&otrack,32000,0);
a819a5f7 767
e24ea474 768 sprintf(tname,"TRDb_%d",GetEventNumber());
5443e65e 769 TTree trdTree(tname,"Back propagated TRD tracks at outer TRD time bin");
029cd327 770 AliTRDtrack *otrackTRD=0;
771 trdTree.Branch("tracks","AliTRDtrack",&otrackTRD,32000,0);
5443e65e 772
9c9d2487 773 if (IsStoringBarrel()) SetBarrelTree("back");
774 out->cd();
46d29e70 775
9c9d2487 776 Int_t found=0;
5443e65e 777 Int_t nseed=fSeeds->GetEntriesFast();
46d29e70 778
029cd327 779 // Float_t foundMin = fgkMinClustersInTrack * fTimeBinsPerPlane * fGeom->Nplan();
9c9d2487 780 Float_t foundMin = 40;
a819a5f7 781
029cd327 782 Int_t outermostTB = fTrSec[0]->GetOuterTimeBin();
a819a5f7 783
5443e65e 784 for (Int_t i=0; i<nseed; i++) {
a819a5f7 785
5443e65e 786 AliTRDtrack *ps=(AliTRDtrack*)fSeeds->UncheckedAt(i), &s=*ps;
787 Int_t expectedClr = FollowBackProlongation(s);
9c9d2487 788
789 if (IsStoringBarrel()) {
029cd327 790 StoreBarrelTrack(ps, fgkLastPlane, kTrackBack);
9c9d2487 791 fBarrelTree->Fill();
792 }
793
5443e65e 794 Int_t foundClr = s.GetNumberOfClusters();
029cd327 795 Int_t lastTB = fTrSec[0]->GetLayerNumber(s.GetX());
a819a5f7 796
fd621f36 797 // printf("seed %d: found %d out of %d expected clusters, Min is %f\n",
a9814c09 798 // i, foundClr, expectedClr, foundMin);
a819a5f7 799
5443e65e 800 if (foundClr >= foundMin) {
a9814c09 801 if(foundClr >= 2) {
802 s.CookdEdx();
029cd327 803 CookLabel(ps, 1-fgkLabelFraction);
a9814c09 804 UseClusters(ps);
805 }
0d5b5c27 806
807 // Propagate to outer reference plane [SR, GSI, 18.02.2003]
808 ps->PropagateTo(364.8);
029cd327 809 otrackTRD=ps;
5443e65e 810 trdTree.Fill();
e24ea474 811 found++;
812// cout<<found<<'\r';
46d29e70 813 }
a819a5f7 814
029cd327 815 if(((expectedClr < 10) && (lastTB == outermostTB)) ||
5443e65e 816 ((expectedClr >= 10) &&
a9814c09 817 (((Float_t) foundClr) / ((Float_t) expectedClr) >=
029cd327 818 fgkMinFractionOfFoundClusters) && (lastTB == outermostTB))) {
5443e65e 819
029cd327 820 Double_t xTOF = 375.5;
5443e65e 821
029cd327 822 if(PropagateToOuterPlane(s,xTOF)) {
a9814c09 823 AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
824 otrack = pt;
825 tofTree1.Fill();
826 delete pt;
5443e65e 827
029cd327 828 xTOF = 381.5;
5443e65e 829
029cd327 830 if(PropagateToOuterPlane(s,xTOF)) {
a9814c09 831 AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
832 otrack = pt;
833 tofTree2.Fill();
834 delete pt;
835
029cd327 836 Double_t xPHOS = 460.;
a9814c09 837
029cd327 838 if(PropagateToOuterPlane(s,xPHOS)) {
a9814c09 839 AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
840 otrack = pt;
841 phosTree.Fill();
842 delete pt;
843
029cd327 844 Double_t xRICH = 490+1.267;
a9814c09 845
029cd327 846 if(PropagateToOuterPlane(s,xRICH)) {
a9814c09 847 AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
848 otrack = pt;
849 richTree.Fill();
850 delete pt;
851 }
852 }
853 }
5443e65e 854 }
46d29e70 855 }
856 }
5443e65e 857
9c9d2487 858
859 out->cd();
5443e65e 860 tofTree1.Write();
861 tofTree2.Write();
862 phosTree.Write();
863 richTree.Write();
864 trdTree.Write();
46d29e70 865
9c9d2487 866 if (IsStoringBarrel()) { // [SR, 03.04.2003]
867 fBarrelFile->cd();
868 fBarrelTree->Write();
869 fBarrelFile->Flush();
870 }
871
5443e65e 872 savedir->cd();
873 cerr<<"Number of seeds: "<<nseed<<endl;
874 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
46d29e70 875
5443e65e 876 UnloadEvent();
46d29e70 877
5443e65e 878 return 0;
46d29e70 879
5443e65e 880}
46d29e70 881
c630aafd 882//_____________________________________________________________________________
883Int_t AliTRDtracker::PropagateBack(AliESD* event) {
884 //
885 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
886 // backpropagated by the TPC tracker. Each seed is first propagated
887 // to the TRD, and then its prolongation is searched in the TRD.
888 // If sufficiently long continuation of the track is found in the TRD
889 // the track is updated, otherwise it's stored as originaly defined
890 // by the TPC tracker.
891 //
892
893 Int_t found=0;
894 Float_t foundMin = 40;
895
896 Int_t n = event->GetNumberOfTracks();
897 for (Int_t i=0; i<n; i++) {
898 AliESDtrack* seed=event->GetTrack(i);
899 ULong_t status=seed->GetStatus();
900 if ( (status & AliESDtrack::kTPCout ) == 0 ) continue;
901 if ( (status & AliESDtrack::kTRDout) != 0 ) continue;
902
903 Int_t lbl = seed->GetLabel();
904 AliTRDtrack *track = new AliTRDtrack(*seed);
905 track->SetSeedLabel(lbl);
906 fNseeds++;
907
3c625a9b 908 Int_t expectedClr = FollowBackProlongation(*track);
909 if (track->GetNumberOfClusters()<expectedClr/3){
910 AliTRDtrack *track1 = new AliTRDtrack(*seed);
911 track1->SetSeedLabel(lbl);
912 FollowBackProlongation(*track1);
913 AliTRDtrack *track2= new AliTRDtrack(*seed);
914 track->SetSeedLabel(lbl);
915 FollowBackProlongation(*track2);
916 delete track1;
917 delete track2;
918 }
919
c630aafd 920 Int_t foundClr = track->GetNumberOfClusters();
921 if (foundClr >= foundMin) {
922 if(foundClr >= 2) {
923 track->CookdEdx();
029cd327 924// CookLabel(track, 1-fgkLabelFraction);
c630aafd 925 UseClusters(track);
926 }
927
928 // Propagate to outer reference plane [SR, GSI, 18.02.2003]
929// track->PropagateTo(364.8); why?
930
931 //seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
932 //found++;
933 }
934
1e9bb598 935 //Propagation to the TOF (I.Belikov)
3c625a9b 936
937 if (track->GetStop()==kFALSE){
938 Double_t xTOF = 375.5;
939 PropagateToOuterPlane(*track,xTOF);
940
941 Double_t xtof=378.;
942 Double_t c2=track->GetC()*xtof - track->GetEta();
943 if (TMath::Abs(c2)>=0.9999999) continue;
944
945 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
946 Double_t y=track->GetYat(xtof);
947 if (y > ymax) {
948 if (!track->Rotate(AliTRDgeometry::GetAlpha())) return 1;
949 } else if (y <-ymax) {
950 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) return 1;
951 }
952
953 if (track->PropagateTo(xtof)) {
954 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
955 if (track->GetNumberOfClusters()>foundMin) found++;
956 }
957 }else{
958 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
959 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
960 seed->UpdateTrackParams(track, AliESDtrack::kTRDStop);
961 found++;
962 }
1e9bb598 963 }
964
d9b8978b 965 delete track;
3c625a9b 966
1e9bb598 967 //End of propagation to the TOF
3c625a9b 968 //if (foundClr>foundMin)
969 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
970
c630aafd 971
972 }
973
974 cerr<<"Number of seeds: "<<fNseeds<<endl;
975 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
976
1e9bb598 977 fSeeds->Clear(); fNseeds=0;
978
979 return 0;
980
981}
982
983//_____________________________________________________________________________
984Int_t AliTRDtracker::RefitInward(AliESD* event)
985{
986 //
987 // Refits tracks within the TRD. The ESD event is expected to contain seeds
988 // at the outer part of the TRD.
989 // The tracks are propagated to the innermost time bin
990 // of the TRD and the ESD event is updated
991 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
992 //
993
994 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
995 Float_t foundMin = fgkMinClustersInTrack * timeBins;
996 Int_t nseed = 0;
997 Int_t found = 0;
998 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
999
1000 Int_t n = event->GetNumberOfTracks();
1001 for (Int_t i=0; i<n; i++) {
1002 AliESDtrack* seed=event->GetTrack(i);
1003 ULong_t status=seed->GetStatus();
1004 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
46e2d86c 1005 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
1e9bb598 1006 nseed++;
1007
1008 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
3c625a9b 1009 seed2->ResetCovariance(5.);
1e9bb598 1010 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
46e2d86c 1011 UInt_t * indexes2 = seed2->GetIndexes();
1012 UInt_t * indexes3 = pt->GetBackupIndexes();
1013 for (Int_t i=0;i<200;i++) {
1014 if (indexes2[i]==0) break;
1015 indexes3[i] = indexes2[i];
1016 }
1017 //AliTRDtrack *pt = seed2;
1e9bb598 1018 AliTRDtrack &t=*pt;
1019 FollowProlongation(t, innerTB);
46e2d86c 1020
1021 if (t.GetNumberOfClusters()<seed->GetTRDclusters(indexes3)*0.5){
1022 // debug - why we dont go back?
1023 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1024 UInt_t * indexes2 = seed2->GetIndexes();
1025 UInt_t * indexes3 = pt2->GetBackupIndexes();
1026 for (Int_t i=0;i<200;i++) {
1027 if (indexes2[i]==0) break;
1028 indexes3[i] = indexes2[i];
1029 }
3c625a9b 1030 FollowProlongation(*pt2, innerTB);
1031 delete pt2;
46e2d86c 1032 }
1033
1e9bb598 1034 if (t.GetNumberOfClusters() >= foundMin) {
46e2d86c 1035 // UseClusters(&t);
1036 //CookLabel(pt, 1-fgkLabelFraction);
1e9bb598 1037 // t.CookdEdx();
1038 }
1039 found++;
1040// cout<<found<<'\r';
1041
1042 if(PropagateToTPC(t)) {
0fa7dfa7 1043 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
1e9bb598 1044 }
1045 delete seed2;
1046 delete pt;
1047 }
1048
1049 cout<<"Number of loaded seeds: "<<nseed<<endl;
1050 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
1051
c630aafd 1052 return 0;
1053
1054}
1055
bbf92647 1056
5443e65e 1057//---------------------------------------------------------------------------
1058Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
1059{
1060 // Starting from current position on track=t this function tries
1061 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1062 // if a close cluster is found. Returns the number of clusters
1063 // expected to be found in sensitive layers
bbf92647 1064
5443e65e 1065 Float_t wIndex, wTB, wChi2;
1066 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1067 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1068 Float_t wPx, wPy, wPz, wC;
029cd327 1069 Double_t px, py, pz;
5443e65e 1070 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
3c625a9b 1071 Int_t lastplane = GetLastPlane(&t);
46d29e70 1072
5443e65e 1073 Int_t trackIndex = t.GetLabel();
46d29e70 1074
5443e65e 1075 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
46d29e70 1076
029cd327 1077 Int_t tryAgain=fMaxGap;
46d29e70 1078
5443e65e 1079 Double_t alpha=t.GetAlpha();
c630aafd 1080 alpha = TVector2::Phi_0_2pi(alpha);
46d29e70 1081
5443e65e 1082 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
029cd327 1083 Double_t radLength, rho, x, dx, y, ymax, z;
46d29e70 1084
5443e65e 1085 Int_t expectedNumberOfClusters = 0;
1086 Bool_t lookForCluster;
46d29e70 1087
5443e65e 1088 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1089
5443e65e 1090
1091 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1092
1093 y = t.GetY(); z = t.GetZ();
1094
1095 // first propagate to the inner surface of the current time bin
029cd327 1096 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1097 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1098 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1099 y = t.GetY();
1100 ymax = x*TMath::Tan(0.5*alpha);
1101 if (y > ymax) {
1102 s = (s+1) % ns;
1103 if (!t.Rotate(alpha)) break;
029cd327 1104 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1105 } else if (y <-ymax) {
1106 s = (s-1+ns) % ns;
1107 if (!t.Rotate(-alpha)) break;
029cd327 1108 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1109 }
46d29e70 1110
5443e65e 1111 y = t.GetY(); z = t.GetZ();
1112
1113 // now propagate to the middle plane of the next time bin
029cd327 1114 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1115 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1116 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1117 y = t.GetY();
1118 ymax = x*TMath::Tan(0.5*alpha);
1119 if (y > ymax) {
1120 s = (s+1) % ns;
1121 if (!t.Rotate(alpha)) break;
029cd327 1122 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1123 } else if (y <-ymax) {
1124 s = (s-1+ns) % ns;
1125 if (!t.Rotate(-alpha)) break;
029cd327 1126 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1127 }
46d29e70 1128
46d29e70 1129
5443e65e 1130 if(lookForCluster) {
a819a5f7 1131
5443e65e 1132 expectedNumberOfClusters++;
5443e65e 1133 wIndex = (Float_t) t.GetLabel();
1134 wTB = nr;
46d29e70 1135
029cd327 1136 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
46d29e70 1137
5443e65e 1138 Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
5443e65e 1139 Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
46d29e70 1140
5443e65e 1141 Double_t road;
1142 if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
1143 else return expectedNumberOfClusters;
1144
1145 wYrt = (Float_t) y;
1146 wZrt = (Float_t) z;
1147 wYwindow = (Float_t) road;
029cd327 1148 t.GetPxPyPz(px,py,pz);
1149 wPx = (Float_t) px;
1150 wPy = (Float_t) py;
1151 wPz = (Float_t) pz;
5443e65e 1152 wC = (Float_t) t.GetC();
1153 wSigmaC2 = (Float_t) t.GetSigmaC2();
1154 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1155 wSigmaY2 = (Float_t) t.GetSigmaY2();
1156 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1157 wChi2 = -1;
1158
5443e65e 1159
1160 AliTRDcluster *cl=0;
1161 UInt_t index=0;
1162
029cd327 1163 Double_t maxChi2=fgkMaxChi2;
5443e65e 1164
1165 wYclosest = 12345678;
1166 wYcorrect = 12345678;
1167 wZclosest = 12345678;
1168 wZcorrect = 12345678;
1169 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1170
1171 // Find the closest correct cluster for debugging purposes
029cd327 1172 if (timeBin) {
a9814c09 1173 Float_t minDY = 1000000;
029cd327 1174 for (Int_t i=0; i<timeBin; i++) {
1175 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1176 if((c->GetLabel(0) != trackIndex) &&
1177 (c->GetLabel(1) != trackIndex) &&
1178 (c->GetLabel(2) != trackIndex)) continue;
1179 if(TMath::Abs(c->GetY() - y) > minDY) continue;
1180 minDY = TMath::Abs(c->GetY() - y);
1181 wYcorrect = c->GetY();
1182 wZcorrect = c->GetZ();
1183
1184 Double_t h01 = GetTiltFactor(c);
1185 wChi2 = t.GetPredictedChi2(c, h01);
1186 }
5443e65e 1187 }
46d29e70 1188
5443e65e 1189 // Now go for the real cluster search
a819a5f7 1190
029cd327 1191 if (timeBin) {
46e2d86c 1192 //
1193 //find cluster in history
1194 cl =0;
1195
1196 AliTRDcluster * cl0 = timeBin[0];
1197 if (!cl0) {
1198 continue;
1199 }
1200 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
3c625a9b 1201 if (plane>lastplane) continue;
46e2d86c 1202 Int_t timebin = cl0->GetLocalTimeBin();
1203 AliTRDcluster * cl2= GetCluster(&t,plane, timebin);
3c625a9b 1204 if (cl2) {
1205 cl =cl2;
1206 Double_t h01 = GetTiltFactor(cl);
1207 maxChi2=t.GetPredictedChi2(cl,h01);
1208 }
46e2d86c 1209 if ((!cl) && road>fgkWideRoad) {
1210 //if (t.GetNumberOfClusters()>4)
1211 // cerr<<t.GetNumberOfClusters()
1212 // <<"FindProlongation warning: Too broad road !\n";
1213 continue;
1214 }
1215
1216
1217 if(!cl){
1218
1219 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1220 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1221 if (c->GetY() > y+road) break;
1222 if (c->IsUsed() > 0) continue;
1223 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1224
1225 Double_t h01 = GetTiltFactor(c);
1226 Double_t chi2=t.GetPredictedChi2(c,h01);
1227
1228 if (chi2 > maxChi2) continue;
1229 maxChi2=chi2;
1230 cl=c;
1231 index=timeBin.GetIndex(i);
1232 }
1233 }
a9814c09 1234
1235 if(!cl) {
1236
029cd327 1237 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1238 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1239
1240 if (c->GetY() > y+road) break;
1241 if (c->IsUsed() > 0) continue;
1242 if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
1243
1244 Double_t h01 = GetTiltFactor(c);
1245 Double_t chi2=t.GetPredictedChi2(c, h01);
1246
029cd327 1247 if (chi2 > maxChi2) continue;
1248 maxChi2=chi2;
a9814c09 1249 cl=c;
029cd327 1250 index=timeBin.GetIndex(i);
a9814c09 1251 }
1252 }
a9814c09 1253 if (cl) {
1254 wYclosest = cl->GetY();
1255 wZclosest = cl->GetZ();
1256 Double_t h01 = GetTiltFactor(cl);
1257
1258 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
46e2d86c 1259 //printf("Track position\t%f\t%f\t%f\n",t.GetX(),t.GetY(),t.GetZ());
1260 //printf("Cluster position\t%d\t%f\t%f\n",cl->GetLocalTimeBin(),cl->GetY(),cl->GetZ());
3c625a9b 1261 Int_t det = cl->GetDetector();
1262 Int_t plane = fGeom->GetPlane(det);
46e2d86c 1263
3c625a9b 1264 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1265 //if(!t.Update(cl,maxChi2,index,h01)) {
1266 //if(!tryAgain--) return 0;
a9814c09 1267 }
029cd327 1268 else tryAgain=fMaxGap;
a9814c09 1269 }
1270 else {
3c625a9b 1271 //if (tryAgain==0) break;
029cd327 1272 tryAgain--;
a9814c09 1273 }
1274
1275 /*
1276 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1277
1278 printf(" %f", wIndex); //1
1279 printf(" %f", wTB); //2
1280 printf(" %f", wYrt); //3
1281 printf(" %f", wYclosest); //4
1282 printf(" %f", wYcorrect); //5
1283 printf(" %f", wYwindow); //6
1284 printf(" %f", wZrt); //7
1285 printf(" %f", wZclosest); //8
1286 printf(" %f", wZcorrect); //9
1287 printf(" %f", wZwindow); //10
1288 printf(" %f", wPx); //11
1289 printf(" %f", wPy); //12
1290 printf(" %f", wPz); //13
1291 printf(" %f", wSigmaC2*1000000); //14
1292 printf(" %f", wSigmaTgl2*1000); //15
1293 printf(" %f", wSigmaY2); //16
1294 // printf(" %f", wSigmaZ2); //17
1295 printf(" %f", wChi2); //17
1296 printf(" %f", wC); //18
1297 printf("\n");
1298 }
1299 */
5443e65e 1300 }
1301 }
1302 }
1303 return expectedNumberOfClusters;
1304
1305
1306}
a819a5f7 1307
5443e65e 1308//___________________________________________________________________
46d29e70 1309
5443e65e 1310Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
1311{
1312 // Starting from current radial position of track <t> this function
1313 // extrapolates the track up to outer timebin and in the sensitive
1314 // layers confirms prolongation if a close cluster is found.
1315 // Returns the number of clusters expected to be found in sensitive layers
46d29e70 1316
5443e65e 1317 Float_t wIndex, wTB, wChi2;
1318 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1319 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1320 Float_t wPx, wPy, wPz, wC;
029cd327 1321 Double_t px, py, pz;
5443e65e 1322 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
46d29e70 1323
5443e65e 1324 Int_t trackIndex = t.GetLabel();
029cd327 1325 Int_t tryAgain=fMaxGap;
46d29e70 1326
5443e65e 1327 Double_t alpha=t.GetAlpha();
9c9d2487 1328 TVector2::Phi_0_2pi(alpha);
46d29e70 1329
9c9d2487 1330 Int_t s;
46d29e70 1331
5443e65e 1332 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
029cd327 1333 Double_t radLength, rho, x, dx, y, ymax = 0, z;
5443e65e 1334 Bool_t lookForCluster;
a819a5f7 1335
5443e65e 1336 Int_t expectedNumberOfClusters = 0;
1337 x = t.GetX();
46d29e70 1338
5443e65e 1339 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1340
029cd327 1341 Int_t nRefPlane = fgkFirstPlane;
9c9d2487 1342 Bool_t isNewLayer = kFALSE;
46d29e70 1343
9c9d2487 1344 Double_t chi2;
1345 Double_t minDY;
3c625a9b 1346 Int_t zone =-10;
1347 Int_t nr;
1348 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
9c9d2487 1349
1350 y = t.GetY();
1351 z = t.GetZ();
46d29e70 1352
5443e65e 1353 // first propagate to the outer surface of the current time bin
46d29e70 1354
9c9d2487 1355 s = t.GetSector();
029cd327 1356 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1357 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2;
1358 y = t.GetY();
1359 z = t.GetZ();
46d29e70 1360
029cd327 1361 if(!t.PropagateTo(x,radLength,rho)) break;
3c625a9b 1362 // if (!AdjustSector(&t)) break;
1363 //
1364 // MI -fix untill correct material desription will be implemented
1365 //
1366 Float_t angle = t.GetAlpha(); // MI - if rotation - we go through the material -
9c9d2487 1367 if (!AdjustSector(&t)) break;
3c625a9b 1368 if (TMath::Abs(angle - t.GetAlpha())>0.000001) break; //better to stop track
1369 Int_t currentzone = fTrSec[s]->GetLayer(nr)->GetZone(z);
1370 if (currentzone==-10) break; // we are in the frame
1371 if (currentzone>-10){ // layer knows where we are
1372 if (zone==-10) zone = currentzone;
1373 if (zone!=currentzone) break;
1374 }
1375 //
1376 //
9c9d2487 1377 s = t.GetSector();
029cd327 1378 if (!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1379
5443e65e 1380 y = t.GetY();
9c9d2487 1381 z = t.GetZ();
a819a5f7 1382
9c9d2487 1383 // Barrel Tracks [SR, 04.04.2003]
46d29e70 1384
9c9d2487 1385 s = t.GetSector();
1386 if (fTrSec[s]->GetLayer(nr)->IsSensitive() !=
1387 fTrSec[s]->GetLayer(nr+1)->IsSensitive() ) {
46d29e70 1388
c630aafd 1389// if (IsStoringBarrel()) StoreBarrelTrack(&t, nRefPlane++, kTrackBack);
9c9d2487 1390 }
46d29e70 1391
9c9d2487 1392 if (fTrSec[s]->GetLayer(nr-1)->IsSensitive() &&
1393 ! fTrSec[s]->GetLayer(nr)->IsSensitive()) {
1394 isNewLayer = kTRUE;
1395 } else {isNewLayer = kFALSE;}
46d29e70 1396
5443e65e 1397 y = t.GetY();
9c9d2487 1398 z = t.GetZ();
a819a5f7 1399
9c9d2487 1400 // now propagate to the middle plane of the next time bin
029cd327 1401 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1402
9c9d2487 1403 x = fTrSec[s]->GetLayer(nr+1)->GetX();
029cd327 1404 if(!t.PropagateTo(x,radLength,rho)) break;
9c9d2487 1405 if (!AdjustSector(&t)) break;
1406 s = t.GetSector();
029cd327 1407 if(!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1408
9c9d2487 1409 y = t.GetY();
1410 z = t.GetZ();
1411
1412 if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
5443e65e 1413 // printf("label %d, pl %d, lookForCluster %d \n",
a9814c09 1414 // trackIndex, nr+1, lookForCluster);
5443e65e 1415
1416 if(lookForCluster) {
1417 expectedNumberOfClusters++;
1418
1419 wIndex = (Float_t) t.GetLabel();
1420 wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
1421
029cd327 1422 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
5443e65e 1423 Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
1424 Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
1425 if((t.GetSigmaY2() + sy2) < 0) break;
1426 Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
1427 Double_t y=t.GetY(), z=t.GetZ();
1428
1429 wYrt = (Float_t) y;
1430 wZrt = (Float_t) z;
1431 wYwindow = (Float_t) road;
029cd327 1432 t.GetPxPyPz(px,py,pz);
1433 wPx = (Float_t) px;
1434 wPy = (Float_t) py;
1435 wPz = (Float_t) pz;
5443e65e 1436 wC = (Float_t) t.GetC();
1437 wSigmaC2 = (Float_t) t.GetSigmaC2();
1438 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1439 wSigmaY2 = (Float_t) t.GetSigmaY2();
1440 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1441 wChi2 = -1;
1442
029cd327 1443 if (road>fgkWideRoad) {
a9814c09 1444 if (t.GetNumberOfClusters()>4)
1445 cerr<<t.GetNumberOfClusters()
1446 <<"FindProlongation warning: Too broad road !\n";
1447 return 0;
5443e65e 1448 }
1449
1450 AliTRDcluster *cl=0;
1451 UInt_t index=0;
1452
029cd327 1453 Double_t maxChi2=fgkMaxChi2;
5443e65e 1454
9c9d2487 1455 if (isNewLayer) {
1456 road = 3 * road;
1457 //sz2 = 3 * sz2;
029cd327 1458 maxChi2 = 10 * fgkMaxChi2;
9c9d2487 1459 }
1460
029cd327 1461 if (nRefPlane == fgkFirstPlane) maxChi2 = 20 * fgkMaxChi2;
1462 if (nRefPlane == fgkFirstPlane+2) maxChi2 = 15 * fgkMaxChi2;
1463 if (t.GetNRotate() > 0) maxChi2 = 3 * maxChi2;
9c9d2487 1464
1465
5443e65e 1466 wYclosest = 12345678;
1467 wYcorrect = 12345678;
1468 wZclosest = 12345678;
1469 wZcorrect = 12345678;
1470 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1471
1472 // Find the closest correct cluster for debugging purposes
029cd327 1473 if (timeBin) {
9c9d2487 1474 minDY = 1000000;
029cd327 1475 for (Int_t i=0; i<timeBin; i++) {
1476 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1477 if((c->GetLabel(0) != trackIndex) &&
1478 (c->GetLabel(1) != trackIndex) &&
1479 (c->GetLabel(2) != trackIndex)) continue;
1480 if(TMath::Abs(c->GetY() - y) > minDY) continue;
9c9d2487 1481 //minDY = TMath::Abs(c->GetY() - y);
1482 minDY = c->GetY() - y;
a9814c09 1483 wYcorrect = c->GetY();
1484 wZcorrect = c->GetZ();
1485
1486 Double_t h01 = GetTiltFactor(c);
1487 wChi2 = t.GetPredictedChi2(c, h01);
1488 }
5443e65e 1489 }
46d29e70 1490
5443e65e 1491 // Now go for the real cluster search
46d29e70 1492
029cd327 1493 if (timeBin) {
5443e65e 1494
029cd327 1495 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1496 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1497 if (c->GetY() > y+road) break;
9c9d2487 1498 if (c->IsUsed() > 0) continue;
a9814c09 1499 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1500
1501 Double_t h01 = GetTiltFactor(c);
9c9d2487 1502 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1503
029cd327 1504 if (chi2 > maxChi2) continue;
1505 maxChi2=chi2;
a9814c09 1506 cl=c;
029cd327 1507 index=timeBin.GetIndex(i);
9c9d2487 1508
1509 //check is correct
1510 if((c->GetLabel(0) != trackIndex) &&
1511 (c->GetLabel(1) != trackIndex) &&
1512 (c->GetLabel(2) != trackIndex)) t.AddNWrong();
a9814c09 1513 }
5443e65e 1514
a9814c09 1515 if(!cl) {
1516
029cd327 1517 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1518 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1519
1520 if (c->GetY() > y+road) break;
9c9d2487 1521 if (c->IsUsed() > 0) continue;
a9814c09 1522 if((c->GetZ()-z)*(c->GetZ()-z) > 2.25 * 12 * sz2) continue;
1523
1524 Double_t h01 = GetTiltFactor(c);
9c9d2487 1525 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1526
029cd327 1527 if (chi2 > maxChi2) continue;
1528 maxChi2=chi2;
a9814c09 1529 cl=c;
029cd327 1530 index=timeBin.GetIndex(i);
a9814c09 1531 }
1532 }
1533
1534 if (cl) {
1535 wYclosest = cl->GetY();
1536 wZclosest = cl->GetZ();
1537
1538 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1539 Double_t h01 = GetTiltFactor(cl);
3c625a9b 1540 Int_t det = cl->GetDetector();
1541 Int_t plane = fGeom->GetPlane(det);
1542
1543 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1544 //if(!t.Update(cl,maxChi2,index,h01)) {
029cd327 1545 if(!tryAgain--) return 0;
a9814c09 1546 }
029cd327 1547 else tryAgain=fMaxGap;
a9814c09 1548 }
1549 else {
029cd327 1550 if (tryAgain==0) break;
1551 tryAgain--;
9c9d2487 1552
1553 //if (minDY < 1000000 && isNewLayer)
1554 //cout << "\t" << nRefPlane << "\t" << "\t" << t.GetNRotate() << "\t" <<
029cd327 1555 // road << "\t" << minDY << "\t" << chi2 << "\t" << wChi2 << "\t" << maxChi2 << endl;
9c9d2487 1556
a9814c09 1557 }
1558
9c9d2487 1559 isNewLayer = kFALSE;
1560
a9814c09 1561 /*
1562 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1563
1564 printf(" %f", wIndex); //1
1565 printf(" %f", wTB); //2
1566 printf(" %f", wYrt); //3
1567 printf(" %f", wYclosest); //4
1568 printf(" %f", wYcorrect); //5
1569 printf(" %f", wYwindow); //6
1570 printf(" %f", wZrt); //7
1571 printf(" %f", wZclosest); //8
1572 printf(" %f", wZcorrect); //9
1573 printf(" %f", wZwindow); //10
1574 printf(" %f", wPx); //11
1575 printf(" %f", wPy); //12
1576 printf(" %f", wPz); //13
1577 printf(" %f", wSigmaC2*1000000); //14
1578 printf(" %f", wSigmaTgl2*1000); //15
1579 printf(" %f", wSigmaY2); //16
1580 // printf(" %f", wSigmaZ2); //17
1581 printf(" %f", wChi2); //17
1582 printf(" %f", wC); //18
1583 printf("\n");
1584 }
1585 */
5443e65e 1586 }
1587 }
1588 }
3c625a9b 1589 if (nr<outerTB)
1590 t.SetStop(kTRUE);
1591 else
1592 t.SetStop(kFALSE);
5443e65e 1593 return expectedNumberOfClusters;
9c9d2487 1594
1595
5443e65e 1596}
1597
1e9bb598 1598//---------------------------------------------------------------------------
1599Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
1600{
1601 // Starting from current position on track=t this function tries
1602 // to extrapolate the track up to timeBin=0 and to reuse already
1603 // assigned clusters. Returns the number of clusters
1604 // expected to be found in sensitive layers
1605 // get indices of assigned clusters for each layer
1606 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1607
1608 Int_t iCluster[90];
1609 for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
1610 for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
1611 Int_t index = t.GetClusterIndex(i);
1612 AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
1613 if (!cl) continue;
1614 Int_t detector=cl->GetDetector();
1615 Int_t localTimeBin=cl->GetLocalTimeBin();
1616 Int_t sector=fGeom->GetSector(detector);
1617 Int_t plane=fGeom->GetPlane(detector);
1618
1619 Int_t trackingSector = CookSectorIndex(sector);
1620
1621 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1622 if(gtb < 0) continue;
1623 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1624 iCluster[layer] = index;
1625 }
1626 t.ResetClusters();
1627
1628 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1629
1630 Double_t alpha=t.GetAlpha();
1631 alpha = TVector2::Phi_0_2pi(alpha);
1632
1633 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1634 Double_t radLength, rho, x, dx, y, ymax, z;
1635
1636 Int_t expectedNumberOfClusters = 0;
1637 Bool_t lookForCluster;
1638
1639 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1640
1641
1642 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1643
1644 y = t.GetY(); z = t.GetZ();
1645
1646 // first propagate to the inner surface of the current time bin
1647 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1648 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1649 if(!t.PropagateTo(x,radLength,rho)) break;
1650 y = t.GetY();
1651 ymax = x*TMath::Tan(0.5*alpha);
1652 if (y > ymax) {
1653 s = (s+1) % ns;
1654 if (!t.Rotate(alpha)) break;
1655 if(!t.PropagateTo(x,radLength,rho)) break;
1656 } else if (y <-ymax) {
1657 s = (s-1+ns) % ns;
1658 if (!t.Rotate(-alpha)) break;
1659 if(!t.PropagateTo(x,radLength,rho)) break;
1660 }
1661
1662 y = t.GetY(); z = t.GetZ();
1663
1664 // now propagate to the middle plane of the next time bin
1665 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1666 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1667 if(!t.PropagateTo(x,radLength,rho)) break;
1668 y = t.GetY();
1669 ymax = x*TMath::Tan(0.5*alpha);
1670 if (y > ymax) {
1671 s = (s+1) % ns;
1672 if (!t.Rotate(alpha)) break;
1673 if(!t.PropagateTo(x,radLength,rho)) break;
1674 } else if (y <-ymax) {
1675 s = (s-1+ns) % ns;
1676 if (!t.Rotate(-alpha)) break;
1677 if(!t.PropagateTo(x,radLength,rho)) break;
1678 }
1679
1680 if(lookForCluster) expectedNumberOfClusters++;
1681
1682 // use assigned cluster
1683 if (!iCluster[nr-1]) continue;
1684 AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
1685 Double_t h01 = GetTiltFactor(cl);
1686 Double_t chi2=t.GetPredictedChi2(cl, h01);
1687 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1688 t.Update(cl,chi2,iCluster[nr-1],h01);
1689 }
1690
1691 return expectedNumberOfClusters;
1692}
1693
5443e65e 1694//___________________________________________________________________
1695
1696Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
1697{
1698 // Starting from current radial position of track <t> this function
1699 // extrapolates the track up to radial position <xToGo>.
1700 // Returns 1 if track reaches the plane, and 0 otherwise
1701
1702 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1703
1704 Double_t alpha=t.GetAlpha();
1705
1706 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1707 if (alpha < 0. ) alpha += 2.*TMath::Pi();
1708
1709 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1710
1711 Bool_t lookForCluster;
029cd327 1712 Double_t radLength, rho, x, dx, y, ymax, z;
5443e65e 1713
1714 x = t.GetX();
1715
1716 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1717
1718 Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
1719
1720 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
1721
1722 y = t.GetY(); z = t.GetZ();
1723
1724 // first propagate to the outer surface of the current time bin
029cd327 1725 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1726 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1727 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1728 y = t.GetY();
1729 ymax = x*TMath::Tan(0.5*alpha);
1730 if (y > ymax) {
1731 s = (s+1) % ns;
1732 if (!t.Rotate(alpha)) return 0;
1733 } else if (y <-ymax) {
1734 s = (s-1+ns) % ns;
1735 if (!t.Rotate(-alpha)) return 0;
1736 }
029cd327 1737 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1738
1739 y = t.GetY(); z = t.GetZ();
1740
1741 // now propagate to the middle plane of the next time bin
029cd327 1742 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1743 x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1744 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1745 y = t.GetY();
1746 ymax = x*TMath::Tan(0.5*alpha);
1747 if (y > ymax) {
1748 s = (s+1) % ns;
1749 if (!t.Rotate(alpha)) return 0;
1750 } else if (y <-ymax) {
1751 s = (s-1+ns) % ns;
1752 if (!t.Rotate(-alpha)) return 0;
1753 }
029cd327 1754 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1755 }
1756 return 1;
1757}
1758
1759//___________________________________________________________________
1760
1761Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
1762{
1763 // Starting from current radial position of track <t> this function
1764 // extrapolates the track up to radial position of the outermost
1765 // padrow of the TPC.
1766 // Returns 1 if track reaches the TPC, and 0 otherwise
1767
c630aafd 1768 //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
5443e65e 1769
1770 Double_t alpha=t.GetAlpha();
c630aafd 1771 alpha = TVector2::Phi_0_2pi(alpha);
5443e65e 1772
1773 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1774
1775 Bool_t lookForCluster;
029cd327 1776 Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
5443e65e 1777
1778 x = t.GetX();
1779
1780 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
5443e65e 1781 Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
1782
1783 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
1784
9c9d2487 1785 y = t.GetY();
1786 z = t.GetZ();
5443e65e 1787
1788 // first propagate to the outer surface of the current time bin
029cd327 1789 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1790 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
1791
029cd327 1792 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1793 AdjustSector(&t);
029cd327 1794 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1795
9c9d2487 1796 y = t.GetY();
1797 z = t.GetZ();
5443e65e 1798
1799 // now propagate to the middle plane of the next time bin
029cd327 1800 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1801 x = fTrSec[s]->GetLayer(nr-1)->GetX();
1802
029cd327 1803 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1804 AdjustSector(&t);
029cd327 1805 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1806 }
1807 return 1;
1808}
1809
5443e65e 1810void AliTRDtracker::LoadEvent()
1811{
1812 // Fills clusters into TRD tracking_sectors
1813 // Note that the numbering scheme for the TRD tracking_sectors
1814 // differs from that of TRD sectors
1815
1816 ReadClusters(fClusters);
1817 Int_t ncl=fClusters->GetEntriesFast();
1818 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1819
1820 UInt_t index;
1821 while (ncl--) {
e24ea474 1822// printf("\r %d left ",ncl);
5443e65e 1823 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1824 Int_t detector=c->GetDetector();
1825 Int_t localTimeBin=c->GetLocalTimeBin();
5443e65e 1826 Int_t sector=fGeom->GetSector(detector);
1827 Int_t plane=fGeom->GetPlane(detector);
1828
029cd327 1829 Int_t trackingSector = CookSectorIndex(sector);
5443e65e 1830
029cd327 1831 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
b3a5a838 1832 if(gtb < 0) continue;
029cd327 1833 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
5443e65e 1834
1835 index=ncl;
029cd327 1836 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
5443e65e 1837 }
1838 printf("\r\n");
1839
1840}
1841
c630aafd 1842//_____________________________________________________________________________
1843Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1844{
1845 // Fills clusters into TRD tracking_sectors
1846 // Note that the numbering scheme for the TRD tracking_sectors
1847 // differs from that of TRD sectors
1848
1849 if (ReadClusters(fClusters,cTree)) {
1850 Error("LoadClusters","Problem with reading the clusters !");
1851 return 1;
1852 }
1853 Int_t ncl=fClusters->GetEntriesFast();
1854 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1855
1856 UInt_t index;
3c625a9b 1857 for (Int_t ichamber=0;ichamber<5;ichamber++)
1858 for (Int_t isector=0;isector<18;isector++){
1859 fHoles[ichamber][isector]=kTRUE;
1860 }
1861
1862
c630aafd 1863 while (ncl--) {
1864// printf("\r %d left ",ncl);
1865 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1866 Int_t detector=c->GetDetector();
1867 Int_t localTimeBin=c->GetLocalTimeBin();
c630aafd 1868 Int_t sector=fGeom->GetSector(detector);
1869 Int_t plane=fGeom->GetPlane(detector);
3c625a9b 1870
029cd327 1871 Int_t trackingSector = CookSectorIndex(sector);
3c625a9b 1872 if (c->GetLabel(0)>0){
1873 Int_t chamber = fGeom->GetChamber(detector);
1874 fHoles[chamber][trackingSector]=kFALSE;
1875 }
c630aafd 1876
029cd327 1877 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
c630aafd 1878 if(gtb < 0) continue;
029cd327 1879 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
c630aafd 1880
1881 index=ncl;
029cd327 1882 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
c630aafd 1883 }
1884 printf("\r\n");
3c625a9b 1885 //
1886 //
1887 /*
1888 for (Int_t isector=0;isector<18;isector++){
1889 for (Int_t ichamber=0;ichamber<5;ichamber++)
1890 if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
1891 printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
1892 fGeom->IsHole(0,ichamber,17-isector));
1893 }
1894 */
c630aafd 1895 return 0;
1896}
1897
5443e65e 1898//_____________________________________________________________________________
1899void AliTRDtracker::UnloadEvent()
1900{
1901 //
1902 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1903 //
1904
1905 Int_t i, nentr;
1906
1907 nentr = fClusters->GetEntriesFast();
1908 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1909
1910 nentr = fSeeds->GetEntriesFast();
1911 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1912
1913 nentr = fTracks->GetEntriesFast();
1914 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1915
1916 Int_t nsec = AliTRDgeometry::kNsect;
1917
1918 for (i = 0; i < nsec; i++) {
1919 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1920 fTrSec[i]->GetLayer(pl)->Clear();
1921 }
1922 }
1923
1924}
1925
1926//__________________________________________________________________________
1927void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
1928{
1929 // Creates track seeds using clusters in timeBins=i1,i2
1930
1931 if(turn > 2) {
1932 cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
1933 return;
1934 }
1935
1936 Double_t x[5], c[15];
029cd327 1937 Int_t maxSec=AliTRDgeometry::kNsect;
5443e65e 1938
1939 Double_t alpha=AliTRDgeometry::GetAlpha();
1940 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
1941 Double_t cs=cos(alpha), sn=sin(alpha);
1942 Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
1943
1944
1945 Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
1946 Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
1947
1948 Double_t x1 =fTrSec[0]->GetX(i1);
1949 Double_t xx2=fTrSec[0]->GetX(i2);
1950
029cd327 1951 for (Int_t ns=0; ns<maxSec; ns++) {
5443e65e 1952
029cd327 1953 Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1954 Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
5443e65e 1955 Int_t nm=(*fTrSec[ns]->GetLayer(i2));
029cd327 1956 Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1957 Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
5443e65e 1958
1959 AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
1960
1961 for (Int_t is=0; is < r1; is++) {
1962 Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
1963
1964 for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
a9814c09 1965
1966 const AliTRDcluster *cl;
1967 Double_t x2, y2, z2;
1968 Double_t x3=0., y3=0.;
1969
1970 if (js<nl2) {
1971 if(turn != 2) continue;
029cd327 1972 AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1973 cl=r2[js];
1974 y2=cl->GetY(); z2=cl->GetZ();
1975
1976 x2= xx2*cs2+y2*sn2;
1977 y2=-xx2*sn2+y2*cs2;
1978 }
1979 else if (js<nl2+nl) {
1980 if(turn != 1) continue;
029cd327 1981 AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1982 cl=r2[js-nl2];
1983 y2=cl->GetY(); z2=cl->GetZ();
1984
1985 x2= xx2*cs+y2*sn;
1986 y2=-xx2*sn+y2*cs;
1987 }
1988 else if (js<nl2+nl+nm) {
1989 if(turn != 1) continue;
1990 AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
1991 cl=r2[js-nl2-nl];
1992 x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
1993 }
1994 else if (js<nl2+nl+nm+nu) {
1995 if(turn != 1) continue;
029cd327 1996 AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
a9814c09 1997 cl=r2[js-nl2-nl-nm];
1998 y2=cl->GetY(); z2=cl->GetZ();
1999
2000 x2=xx2*cs-y2*sn;
2001 y2=xx2*sn+y2*cs;
2002 }
2003 else {
2004 if(turn != 2) continue;
029cd327 2005 AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
a9814c09 2006 cl=r2[js-nl2-nl-nm-nu];
2007 y2=cl->GetY(); z2=cl->GetZ();
2008
2009 x2=xx2*cs2-y2*sn2;
2010 y2=xx2*sn2+y2*cs2;
2011 }
2012
029cd327 2013 if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
a9814c09 2014
2015 Double_t zz=z1 - z1/x1*(x1-x2);
2016
029cd327 2017 if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
a9814c09 2018
2019 Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
2020 if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
2021
2022 x[0]=y1;
2023 x[1]=z1;
2024 x[4]=f1trd(x1,y1,x2,y2,x3,y3);
2025
029cd327 2026 if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
a9814c09 2027
2028 x[2]=f2trd(x1,y1,x2,y2,x3,y3);
2029
2030 if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
2031
2032 x[3]=f3trd(x1,y1,x2,y2,z1,z2);
2033
029cd327 2034 if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
a9814c09 2035
2036 Double_t a=asin(x[2]);
2037 Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
2038
029cd327 2039 if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
a9814c09 2040
2041 Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
2042 Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
029cd327 2043 Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
a9814c09 2044
2045 // Tilt changes
2046 Double_t h01 = GetTiltFactor(r1[is]);
029cd327 2047 Double_t xuFactor = 100.;
b8dc2353 2048 if(fNoTilt) {
2049 h01 = 0;
029cd327 2050 xuFactor = 1;
b8dc2353 2051 }
2052
fd621f36 2053 sy1=sy1+sz1*h01*h01;
b3a5a838 2054 Double_t syz=sz1*(-h01);
a9814c09 2055 // end of tilt changes
2056
b3a5a838 2057 Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
2058 Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
2059 Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
2060 Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
2061 Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
2062 Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
2063 Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
2064 Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
2065 Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
2066 Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
2067
a9814c09 2068
b3a5a838 2069 c[0]=sy1;
a9814c09 2070 // c[1]=0.; c[2]=sz1;
029cd327 2071 c[1]=syz; c[2]=sz1*xuFactor;
b3a5a838 2072 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
2073 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
2074 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
2075 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
2076 c[13]=f30*sy1*f40+f32*sy2*f42;
2077 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
a9814c09 2078
2079 UInt_t index=r1.GetIndex(is);
2080
2081 AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
2082
2083 Int_t rc=FollowProlongation(*track, i2);
2084
2085 if ((rc < 1) ||
2086 (track->GetNumberOfClusters() <
029cd327 2087 (outer-inner)*fgkMinClustersInSeed)) delete track;
a9814c09 2088 else {
2089 fSeeds->AddLast(track); fNseeds++;
e24ea474 2090// cerr<<"\r found seed "<<fNseeds;
a9814c09 2091 }
5443e65e 2092 }
2093 }
2094 }
2095}
2096
2097//_____________________________________________________________________________
c630aafd 2098Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree)
5443e65e 2099{
2100 //
a819a5f7 2101 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2102 // from the file. The names of the cluster tree and branches
2103 // should match the ones used in AliTRDclusterizer::WriteClusters()
2104 //
029cd327 2105 TObjArray *clusterArray = new TObjArray(400);
5443e65e 2106
c630aafd 2107 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2108 if (!branch) {
2109 Error("ReadClusters","Can't get the branch !");
2110 return 1;
2111 }
029cd327 2112 branch->SetAddress(&clusterArray);
5443e65e 2113
2114 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2115 printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
a819a5f7 2116
a819a5f7 2117 // Loop through all entries in the tree
2118 Int_t nbytes;
2119 AliTRDcluster *c = 0;
5443e65e 2120 printf("\n");
a819a5f7 2121
2122 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2123
2124 // Import the tree
5443e65e 2125 nbytes += ClusterTree->GetEvent(iEntry);
2126
a819a5f7 2127 // Get the number of points in the detector
029cd327 2128 Int_t nCluster = clusterArray->GetEntriesFast();
e24ea474 2129// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 2130
a819a5f7 2131 // Loop through all TRD digits
2132 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2133 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
a819a5f7 2134 AliTRDcluster *co = new AliTRDcluster(*c);
2135 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
5443e65e 2136 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 2137 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2138 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
a819a5f7 2139 array->AddLast(co);
029cd327 2140 delete clusterArray->RemoveAt(iCluster);
a819a5f7 2141 }
2142 }
2143
029cd327 2144 delete clusterArray;
5443e65e 2145
c630aafd 2146 return 0;
a819a5f7 2147}
2148
5443e65e 2149//______________________________________________________________________
2150void AliTRDtracker::ReadClusters(TObjArray *array, const Char_t *filename)
a819a5f7 2151{
2152 //
5443e65e 2153 // Reads AliTRDclusters from file <filename>. The names of the cluster
2154 // tree and branches should match the ones used in
2155 // AliTRDclusterizer::WriteClusters()
2156 // if <array> == 0, clusters are added into AliTRDtracker fCluster array
a819a5f7 2157 //
2158
5443e65e 2159 TDirectory *savedir=gDirectory;
46d29e70 2160
5443e65e 2161 TFile *file = TFile::Open(filename);
2162 if (!file->IsOpen()) {
2163 cerr<<"Can't open file with TRD clusters"<<endl;
2164 return;
2165 }
46d29e70 2166
5443e65e 2167 Char_t treeName[12];
e24ea474 2168 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
029cd327 2169 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
46d29e70 2170
029cd327 2171 if (!clusterTree) {
5443e65e 2172 cerr<<"AliTRDtracker::ReadClusters(): ";
2173 cerr<<"can't get a tree with clusters !\n";
2174 return;
2175 }
46d29e70 2176
029cd327 2177 TObjArray *clusterArray = new TObjArray(400);
46d29e70 2178
029cd327 2179 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
46d29e70 2180
029cd327 2181 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2182 cout<<"found "<<nEntries<<" in clusterTree"<<endl;
a819a5f7 2183
5443e65e 2184 // Loop through all entries in the tree
2185 Int_t nbytes;
2186 AliTRDcluster *c = 0;
bbf92647 2187
5443e65e 2188 printf("\n");
bbf92647 2189
5443e65e 2190 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
46d29e70 2191
5443e65e 2192 // Import the tree
029cd327 2193 nbytes += clusterTree->GetEvent(iEntry);
0a29d0f1 2194
5443e65e 2195 // Get the number of points in the detector
029cd327 2196 Int_t nCluster = clusterArray->GetEntriesFast();
b3a5a838 2197 printf("\n Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 2198
2199 // Loop through all TRD digits
2200 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2201 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
5443e65e 2202 AliTRDcluster *co = new AliTRDcluster(*c);
2203 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2204 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 2205 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2206 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
5443e65e 2207 array->AddLast(co);
029cd327 2208 delete clusterArray->RemoveAt(iCluster);
5443e65e 2209 }
46d29e70 2210 }
0a29d0f1 2211
5443e65e 2212 file->Close();
029cd327 2213 delete clusterArray;
5443e65e 2214 savedir->cd();
2215
2216}
2217
c630aafd 2218void AliTRDtracker::ReadClusters(TObjArray *array, const TFile *inp)
2219{
2220 //
2221 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2222 // from the file. The names of the cluster tree and branches
2223 // should match the ones used in AliTRDclusterizer::WriteClusters()
2224 //
2225
2226 TDirectory *savedir=gDirectory;
2227
2228 if (inp) {
2229 TFile *in=(TFile*)inp;
2230 if (!in->IsOpen()) {
2231 cerr<<"AliTRDtracker::ReadClusters(): input file is not open !\n";
2232 return;
2233 }
2234 else{
2235 in->cd();
2236 }
2237 }
2238
2239 Char_t treeName[12];
2240 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
029cd327 2241 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
c630aafd 2242
029cd327 2243 TObjArray *clusterArray = new TObjArray(400);
c630aafd 2244
029cd327 2245 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
c630aafd 2246
029cd327 2247 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2248 printf("found %d entries in %s.\n",nEntries,clusterTree->GetName());
c630aafd 2249
2250 // Loop through all entries in the tree
2251 Int_t nbytes;
2252 AliTRDcluster *c = 0;
2253 printf("\n");
2254
2255 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2256
2257 // Import the tree
029cd327 2258 nbytes += clusterTree->GetEvent(iEntry);
c630aafd 2259
2260 // Get the number of points in the detector
029cd327 2261 Int_t nCluster = clusterArray->GetEntriesFast();
c630aafd 2262// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2263
2264 // Loop through all TRD digits
2265 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2266 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
c630aafd 2267 AliTRDcluster *co = new AliTRDcluster(*c);
2268 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2269 Int_t ltb = co->GetLocalTimeBin();
2270 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2271 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
2272 array->AddLast(co);
029cd327 2273 delete clusterArray->RemoveAt(iCluster);
c630aafd 2274 }
2275 }
2276
029cd327 2277 delete clusterArray;
c630aafd 2278 savedir->cd();
2279
2280}
46d29e70 2281
2282//__________________________________________________________________
029cd327 2283void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2284{
2285 //
2286 // This cooks a label. Mmmmh, smells good...
2287 //
46d29e70 2288
2289 Int_t label=123456789, index, i, j;
5443e65e 2290 Int_t ncl=pt->GetNumberOfClusters();
029cd327 2291 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
5443e65e 2292
029cd327 2293 Bool_t labelAdded;
46d29e70 2294
029cd327 2295 // Int_t s[kRange][2];
2296 Int_t **s = new Int_t* [kRange];
2297 for (i=0; i<kRange; i++) {
d1b06c24 2298 s[i] = new Int_t[2];
2299 }
029cd327 2300 for (i=0; i<kRange; i++) {
46d29e70 2301 s[i][0]=-1;
2302 s[i][1]=0;
2303 }
2304
2305 Int_t t0,t1,t2;
2306 for (i=0; i<ncl; i++) {
5443e65e 2307 index=pt->GetClusterIndex(i);
46d29e70 2308 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
5443e65e 2309 t0=c->GetLabel(0);
2310 t1=c->GetLabel(1);
2311 t2=c->GetLabel(2);
46d29e70 2312 }
2313
2314 for (i=0; i<ncl; i++) {
5443e65e 2315 index=pt->GetClusterIndex(i);
46d29e70 2316 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2317 for (Int_t k=0; k<3; k++) {
5443e65e 2318 label=c->GetLabel(k);
029cd327 2319 labelAdded=kFALSE; j=0;
46d29e70 2320 if (label >= 0) {
029cd327 2321 while ( (!labelAdded) && ( j < kRange ) ) {
a9814c09 2322 if (s[j][0]==label || s[j][1]==0) {
2323 s[j][0]=label;
2324 s[j][1]=s[j][1]+1;
029cd327 2325 labelAdded=kTRUE;
a9814c09 2326 }
2327 j++;
2328 }
46d29e70 2329 }
2330 }
2331 }
2332
46d29e70 2333 Int_t max=0;
2334 label = -123456789;
2335
029cd327 2336 for (i=0; i<kRange; i++) {
46d29e70 2337 if (s[i][1]>max) {
2338 max=s[i][1]; label=s[i][0];
2339 }
2340 }
5443e65e 2341
029cd327 2342 for (i=0; i<kRange; i++) {
5443e65e 2343 delete []s[i];
2344 }
2345
d1b06c24 2346 delete []s;
5443e65e 2347
2348 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
2349
2350 pt->SetLabel(label);
2351
46d29e70 2352}
2353
c630aafd 2354
5443e65e 2355//__________________________________________________________________
029cd327 2356void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2357{
2358 //
2359 // Use clusters, but don't abuse them!
2360 //
2361
5443e65e 2362 Int_t ncl=t->GetNumberOfClusters();
2363 for (Int_t i=from; i<ncl; i++) {
2364 Int_t index = t->GetClusterIndex(i);
2365 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2366 c->Use();
2367 }
2368}
2369
2370
2371//_____________________________________________________________________
029cd327 2372Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
5443e65e 2373{
2374 // Parametrised "expected" error of the cluster reconstruction in Y
2375
2376 Double_t s = 0.08 * 0.08;
2377 return s;
2378}
2379
2380//_____________________________________________________________________
029cd327 2381Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
0a29d0f1 2382{
5443e65e 2383 // Parametrised "expected" error of the cluster reconstruction in Z
2384
a9814c09 2385 Double_t s = 9 * 9 /12.;
5443e65e 2386 return s;
2387}
2388
5443e65e 2389//_____________________________________________________________________
029cd327 2390Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
5443e65e 2391{
2392 //
029cd327 2393 // Returns radial position which corresponds to time bin <localTB>
5443e65e 2394 // in tracking sector <sector> and plane <plane>
2395 //
2396
029cd327 2397 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
5443e65e 2398 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2399 return fTrSec[sector]->GetLayer(pl)->GetX();
2400
2401}
2402
c630aafd 2403
5443e65e 2404//_______________________________________________________
2405AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
029cd327 2406 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
5443e65e 2407{
0a29d0f1 2408 //
5443e65e 2409 // AliTRDpropagationLayer constructor
0a29d0f1 2410 //
46d29e70 2411
029cd327 2412 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
2413 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
5443e65e 2414
46d29e70 2415
029cd327 2416 for(Int_t i=0; i < (Int_t) kZones; i++) {
5443e65e 2417 fZc[i]=0; fZmax[i] = 0;
a819a5f7 2418 }
5443e65e 2419
2420 fYmax = 0;
2421
2422 if(fTimeBinIndex >= 0) {
029cd327 2423 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2424 fIndex = new UInt_t[kMaxClusterPerTimeBin];
a819a5f7 2425 }
46d29e70 2426
3c625a9b 2427 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
5443e65e 2428 fHole = kFALSE;
2429 fHoleZc = 0;
2430 fHoleZmax = 0;
2431 fHoleYc = 0;
2432 fHoleYmax = 0;
2433 fHoleRho = 0;
2434 fHoleX0 = 0;
2435
2436}
2437
2438//_______________________________________________________
2439void AliTRDtracker::AliTRDpropagationLayer::SetHole(
a9814c09 2440 Double_t Zmax, Double_t Ymax, Double_t rho,
029cd327 2441 Double_t radLength, Double_t Yc, Double_t Zc)
5443e65e 2442{
2443 //
2444 // Sets hole in the layer
2445 //
5443e65e 2446 fHole = kTRUE;
2447 fHoleZc = Zc;
2448 fHoleZmax = Zmax;
2449 fHoleYc = Yc;
2450 fHoleYmax = Ymax;
2451 fHoleRho = rho;
029cd327 2452 fHoleX0 = radLength;
5443e65e 2453}
2454
46d29e70 2455
5443e65e 2456//_______________________________________________________
2457AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
2458{
2459 //
2460 // AliTRDtrackingSector Constructor
2461 //
2462
2463 fGeom = geo;
2464 fPar = par;
2465 fGeomSector = gs;
2466 fTzeroShift = 0.13;
2467 fN = 0;
3c625a9b 2468 //
2469 // get holes description from geometry
2470 Bool_t holes[AliTRDgeometry::kNcham];
2471 //printf("sector\t%d\t",gs);
2472 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
2473 holes[icham] = fGeom->IsHole(0,icham,gs);
2474 //printf("%d",holes[icham]);
2475 }
2476 //printf("\n");
2477
029cd327 2478 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
5443e65e 2479
2480
2481 AliTRDpropagationLayer* ppl;
2482
029cd327 2483 Double_t x, xin, xout, dx, rho, radLength;
5443e65e 2484 Int_t steps;
46d29e70 2485
5443e65e 2486 // set time bins in the gas of the TPC
46d29e70 2487
5443e65e 2488 xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
029cd327 2489 rho = 0.9e-3; radLength = 28.94;
5443e65e 2490
2491 for(Int_t i=0; i<steps; i++) {
2492 x = xin + i*dx + dx/2;
029cd327 2493 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2494 InsertLayer(ppl);
46d29e70 2495 }
2496
5443e65e 2497 // set time bins in the outer field cage vessel
46d29e70 2498
029cd327 2499 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2500 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2501 InsertLayer(ppl);
46d29e70 2502
029cd327 2503 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2504 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2505 InsertLayer(ppl);
2506
029cd327 2507 dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2508 steps = 5; dx = (xout - xin)/steps;
2509 for(Int_t i=0; i<steps; i++) {
2510 x = xin + i*dx + dx/2;
029cd327 2511 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2512 InsertLayer(ppl);
2513 }
2514
029cd327 2515 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2516 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2517 InsertLayer(ppl);
2518
029cd327 2519 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2520 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2521 InsertLayer(ppl);
0a29d0f1 2522
5443e65e 2523
2524 // set time bins in CO2
2525
2526 xin = xout; xout = 275.0;
2527 steps = 50; dx = (xout - xin)/steps;
029cd327 2528 rho = 1.977e-3; radLength = 36.2;
5443e65e 2529
2530 for(Int_t i=0; i<steps; i++) {
2531 x = xin + i*dx + dx/2;
029cd327 2532 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2533 InsertLayer(ppl);
2534 }
2535
2536 // set time bins in the outer containment vessel
2537
029cd327 2538 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2539 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2540 InsertLayer(ppl);
2541
029cd327 2542 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2543 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2544 InsertLayer(ppl);
2545
029cd327 2546 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2547 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2548 InsertLayer(ppl);
2549
029cd327 2550 dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2551 steps = 10; dx = (xout - xin)/steps;
2552 for(Int_t i=0; i<steps; i++) {
2553 x = xin + i*dx + dx/2;
029cd327 2554 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2555 InsertLayer(ppl);
2556 }
2557
029cd327 2558 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2559 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2560 InsertLayer(ppl);
2561
029cd327 2562 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2563 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2564 InsertLayer(ppl);
2565
029cd327 2566 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2567 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2568 InsertLayer(ppl);
2569
2570 Double_t xtrd = (Double_t) fGeom->Rmin();
2571
2572 // add layers between TPC and TRD (Air temporarily)
2573 xin = xout; xout = xtrd;
2574 steps = 50; dx = (xout - xin)/steps;
029cd327 2575 rho = 1.2e-3; radLength = 36.66;
5443e65e 2576
2577 for(Int_t i=0; i<steps; i++) {
2578 x = xin + i*dx + dx/2;
029cd327 2579 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2580 InsertLayer(ppl);
2581 }
2582
2583
3c625a9b 2584 // Double_t alpha=AliTRDgeometry::GetAlpha();
5443e65e 2585
2586 // add layers for each of the planes
2587
2588 Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
2589 Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
2590 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2591 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2592 Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
2593 Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
2594 Double_t dxPlane = dxTEC + dxSpace;
2595
029cd327 2596 Int_t tb, tbIndex;
2597 const Int_t kNchambers = AliTRDgeometry::Ncham();
3c625a9b 2598 Double_t ymax = 0;
2599 //, holeYmax = 0;
2600 Double_t ymaxsensitive=0;
029cd327 2601 Double_t *zc = new Double_t[kNchambers];
2602 Double_t *zmax = new Double_t[kNchambers];
3c625a9b 2603 Double_t *zmaxsensitive = new Double_t[kNchambers];
2604 // Double_t holeZmax = 1000.; // the whole sector is missing
5443e65e 2605
5443e65e 2606 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3c625a9b 2607 //
5443e65e 2608 // Radiator
2609 xin = xtrd + plane * dxPlane; xout = xin + dxRad;
029cd327 2610 steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2611 for(Int_t i=0; i<steps; i++) {
2612 x = xin + i*dx + dx/2;
3c625a9b 2613 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2614 InsertLayer(ppl);
2615 }
2616
3c625a9b 2617 ymax = fGeom->GetChamberWidth(plane)/2.;
2618 ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
2619
029cd327 2620 for(Int_t ch = 0; ch < kNchambers; ch++) {
2621 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
5443e65e 2622 Float_t pad = fPar->GetRowPadSize(plane,ch,0);
2623 Float_t row0 = fPar->GetRow0(plane,ch,0);
2624 Int_t nPads = fPar->GetRowMax(plane,ch,0);
857b3eb0 2625 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
3c625a9b 2626 // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
2627 zc[ch] = (pad * nPads)/2 + row0;
2628 //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
2629
5443e65e 2630 }
2631
2632 dx = fPar->GetTimeBinSize();
029cd327 2633 rho = 0.00295 * 0.85; radLength = 11.0;
5443e65e 2634
2635 Double_t x0 = (Double_t) fPar->GetTime0(plane);
2636 Double_t xbottom = x0 - dxDrift;
2637 Double_t xtop = x0 + dxAmp;
3c625a9b 2638 //
5443e65e 2639 // Amplification region
5443e65e 2640 steps = (Int_t) (dxAmp/dx);
2641
2642 for(tb = 0; tb < steps; tb++) {
2643 x = x0 + tb * dx + dx/2;
029cd327 2644 tbIndex = CookTimeBinIndex(plane, -tb-1);
2645 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2646 ppl->SetYmax(ymax,ymaxsensitive);
2647 ppl->SetZ(zc, zmax, zmaxsensitive);
2648 ppl->SetHoles(holes);
5443e65e 2649 InsertLayer(ppl);
2650 }
029cd327 2651 tbIndex = CookTimeBinIndex(plane, -steps);
5443e65e 2652 x = (x + dx/2 + xtop)/2;
2653 dx = 2*(xtop-x);
029cd327 2654 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2655 ppl->SetYmax(ymax,ymaxsensitive);
2656 ppl->SetZ(zc, zmax,zmaxsensitive);
2657 ppl->SetHoles(holes);
5443e65e 2658 InsertLayer(ppl);
2659
2660 // Drift region
2661 dx = fPar->GetTimeBinSize();
2662 steps = (Int_t) (dxDrift/dx);
2663
2664 for(tb = 0; tb < steps; tb++) {
2665 x = x0 - tb * dx - dx/2;
029cd327 2666 tbIndex = CookTimeBinIndex(plane, tb);
5443e65e 2667
029cd327 2668 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2669 ppl->SetYmax(ymax,ymaxsensitive);
2670 ppl->SetZ(zc, zmax, zmaxsensitive);
2671 ppl->SetHoles(holes);
5443e65e 2672 InsertLayer(ppl);
2673 }
029cd327 2674 tbIndex = CookTimeBinIndex(plane, steps);
5443e65e 2675 x = (x - dx/2 + xbottom)/2;
2676 dx = 2*(x-xbottom);
029cd327 2677 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2678 ppl->SetYmax(ymax,ymaxsensitive);
2679 ppl->SetZ(zc, zmax, zmaxsensitive);
2680 ppl->SetHoles(holes);
5443e65e 2681 InsertLayer(ppl);
2682
2683 // Pad Plane
029cd327 2684 xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
2685 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3c625a9b 2686 ppl->SetYmax(ymax,ymaxsensitive);
2687 ppl->SetZ(zc, zmax,zmax);
2688 ppl->SetHoles(holes);
5443e65e 2689 InsertLayer(ppl);
2690
2691 // Rohacell
2692 xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
029cd327 2693 steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2694 for(Int_t i=0; i<steps; i++) {
2695 x = xin + i*dx + dx/2;
029cd327 2696 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3c625a9b 2697 ppl->SetYmax(ymax,ymaxsensitive);
2698 ppl->SetZ(zc, zmax,zmax);
2699 ppl->SetHoles(holes);
5443e65e 2700 InsertLayer(ppl);
2701 }
2702
2703 // Space between the chambers, air
2704 xin = xout; xout = xtrd + (plane + 1) * dxPlane;
029cd327 2705 steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2706 for(Int_t i=0; i<steps; i++) {
2707 x = xin + i*dx + dx/2;
029cd327 2708 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2709 InsertLayer(ppl);
2710 }
2711 }
2712
2713 // Space between the TRD and RICH
2714 Double_t xRICH = 500.;
2715 xin = xout; xout = xRICH;
029cd327 2716 steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2717 for(Int_t i=0; i<steps; i++) {
2718 x = xin + i*dx + dx/2;
029cd327 2719 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2720 InsertLayer(ppl);
2721 }
2722
2723 MapTimeBinLayers();
029cd327 2724 delete [] zc;
2725 delete [] zmax;
5443e65e 2726
2727}
2728
2729//______________________________________________________
2730
029cd327 2731Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
5443e65e 2732{
2733 //
2734 // depending on the digitization parameters calculates "global"
029cd327 2735 // time bin index for timebin <localTB> in plane <plane>
5443e65e 2736 //
2737
2738 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2739 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2740 Double_t dx = (Double_t) fPar->GetTimeBinSize();
2741
2742 Int_t tbAmp = fPar->GetTimeBefore();
2743 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 2744 if(kTRUE) maxAmp = 0; // intentional until we change parameter class
5443e65e 2745 Int_t tbDrift = fPar->GetTimeMax();
2746 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
2747
029cd327 2748 Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
5443e65e 2749
029cd327 2750 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
5443e65e 2751
029cd327 2752 if((localTB < 0) &&
2753 (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
2754 if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
5443e65e 2755
2756 return gtb;
2757
2758
2759}
2760
2761//______________________________________________________
2762
2763void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2764{
2765 //
2766 // For all sensitive time bins sets corresponding layer index
2767 // in the array fTimeBins
2768 //
2769
2770 Int_t index;
2771
2772 for(Int_t i = 0; i < fN; i++) {
2773 index = fLayers[i]->GetTimeBinIndex();
2774
2775 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2776
2777 if(index < 0) continue;
029cd327 2778 if(index >= (Int_t) kMaxTimeBinIndex) {
5443e65e 2779 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2780 printf(" index %d exceeds allowed maximum of %d!\n",
029cd327 2781 index, kMaxTimeBinIndex-1);
5443e65e 2782 continue;
2783 }
2784 fTimeBinIndex[index] = i;
2785 }
2786
2787 Double_t x1, dx1, x2, dx2, gap;
2788
2789 for(Int_t i = 0; i < fN-1; i++) {
2790 x1 = fLayers[i]->GetX();
2791 dx1 = fLayers[i]->GetdX();
2792 x2 = fLayers[i+1]->GetX();
2793 dx2 = fLayers[i+1]->GetdX();
2794 gap = (x2 - dx2/2) - (x1 + dx1/2);
2795 if(gap < -0.01) {
2796 printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
2797 printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
2798 }
2799 if(gap > 0.01) {
2800 printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
2801 printf(" (%f - %f) - (%f + %f) = %f\n",
a9814c09 2802 x2, dx2/2, x1, dx1, gap);
5443e65e 2803 }
2804 }
2805}
2806
2807
2808//______________________________________________________
2809
2810
2811Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2812{
2813 //
2814 // Returns the number of time bin which in radial position is closest to <x>
2815 //
2816
2817 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2818 if(x <= fLayers[0]->GetX()) return 0;
2819
2820 Int_t b=0, e=fN-1, m=(b+e)/2;
2821 for (; b<e; m=(b+e)/2) {
2822 if (x > fLayers[m]->GetX()) b=m+1;
2823 else e=m;
2824 }
2825 if(TMath::Abs(x - fLayers[m]->GetX()) >
2826 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2827 else return m;
2828
2829}
2830
2831//______________________________________________________
2832
2833Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2834{
2835 //
2836 // Returns number of the innermost SENSITIVE propagation layer
2837 //
2838
2839 return GetLayerNumber(0);
2840}
2841
2842//______________________________________________________
2843
2844Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2845{
2846 //
2847 // Returns number of the outermost SENSITIVE time bin
2848 //
2849
2850 return GetLayerNumber(GetNumberOfTimeBins() - 1);
46d29e70 2851}
2852
5443e65e 2853//______________________________________________________
2854
2855Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2856{
2857 //
2858 // Returns number of SENSITIVE time bins
2859 //
2860
2861 Int_t tb, layer;
029cd327 2862 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
5443e65e 2863 layer = GetLayerNumber(tb);
2864 if(layer>=0) break;
2865 }
2866 return tb+1;
2867}
2868
2869//______________________________________________________
2870
2871void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2872{
2873 //
2874 // Insert layer <pl> in fLayers array.
2875 // Layers are sorted according to X coordinate.
2876
029cd327 2877 if ( fN == ((Int_t) kMaxLayersPerSector)) {
5443e65e 2878 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2879 return;
2880 }
2881 if (fN==0) {fLayers[fN++] = pl; return;}
2882 Int_t i=Find(pl->GetX());
2883
2884 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2885 fLayers[i]=pl; fN++;
2886
2887}
2888
2889//______________________________________________________
2890
2891Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2892{
2893 //
2894 // Returns index of the propagation layer nearest to X
2895 //
2896
2897 if (x <= fLayers[0]->GetX()) return 0;
2898 if (x > fLayers[fN-1]->GetX()) return fN;
2899 Int_t b=0, e=fN-1, m=(b+e)/2;
2900 for (; b<e; m=(b+e)/2) {
2901 if (x > fLayers[m]->GetX()) b=m+1;
2902 else e=m;
2903 }
2904 return m;
2905}
2906
3c625a9b 2907//______________________________________________________
2908void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2909{
2910 //
2911 // set centers and the width of sectors
2912 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2913 fZc[icham] = center[icham];
2914 fZmax[icham] = w[icham];
2915 fZmaxSensitive[icham] = wsensitive[icham];
2916 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2917 }
2918}
5443e65e 2919//______________________________________________________
2920
3c625a9b 2921void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2922{
2923 //
2924 // set centers and the width of sectors
2925 fHole = kFALSE;
2926 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2927 fIsHole[icham] = holes[icham];
2928 if (holes[icham]) fHole = kTRUE;
2929 }
2930}
2931
2932
2933
5443e65e 2934void AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
029cd327 2935 Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
a9814c09 2936 Bool_t &lookForCluster) const
5443e65e 2937{
2938 //
029cd327 2939 // Returns radial step <dx>, density <rho>, rad. length <radLength>,
5443e65e 2940 // and sensitivity <lookForCluster> in point <y,z>
2941 //
2942
2943 dx = fdX;
2944 rho = fRho;
029cd327 2945 radLength = fX0;
5443e65e 2946 lookForCluster = kFALSE;
3c625a9b 2947 //
2948 // check dead regions in sensitive volume
5443e65e 2949 if(fTimeBinIndex >= 0) {
3c625a9b 2950 //
2951 Int_t zone=-1;
029cd327 2952 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3c625a9b 2953 if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
2954 zone = ch;
2955 lookForCluster = !(fIsHole[zone]);
2956 if(TMath::Abs(y) > fYmaxSensitive){
2957 lookForCluster = kFALSE;
2958 }
2959 if (fIsHole[zone]) {
2960 //if hole
2961 rho = 1.29e-3;
2962 radLength = 36.66;
2963 }
2964 }
5443e65e 2965 }
3c625a9b 2966 return;
5443e65e 2967 }
3c625a9b 2968 //
2969 //
5443e65e 2970 // check hole
3c625a9b 2971 if (fHole==kFALSE) return;
2972 //
2973 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2974 if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
2975 if (fIsHole[ch]) {
2976 //if hole
2977 rho = 1.29e-3;
2978 radLength = 36.66;
2979 }
2980 }
2981 }
5443e65e 2982 return;
2983}
2984
3c625a9b 2985Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
2986{
2987 //
2988 //
2989 if (fTimeBinIndex < 0) return -20; //unknown
2990 Int_t zone=-10; // dead zone
2991 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2992 if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
2993 zone = ch;
2994 }
2995 return zone;
2996}
2997
2998
5443e65e 2999//______________________________________________________
3000
3001void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
a9814c09 3002 UInt_t index) {
5443e65e 3003
3004// Insert cluster in cluster array.
3005// Clusters are sorted according to Y coordinate.
3006
3007 if(fTimeBinIndex < 0) {
3008 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
3009 return;
3010 }
3011
029cd327 3012 if (fN== (Int_t) kMaxClusterPerTimeBin) {
5443e65e 3013 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
3014 return;
3015 }
3016 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
3017 Int_t i=Find(c->GetY());
3018 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3019 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
3020 fIndex[i]=index; fClusters[i]=c; fN++;
3021}
3022
3023//______________________________________________________
3024
3025Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const {
3026
3027// Returns index of the cluster nearest in Y
3028
3029 if (y <= fClusters[0]->GetY()) return 0;
3030 if (y > fClusters[fN-1]->GetY()) return fN;
3031 Int_t b=0, e=fN-1, m=(b+e)/2;
3032 for (; b<e; m=(b+e)/2) {
3033 if (y > fClusters[m]->GetY()) b=m+1;
3034 else e=m;
3035 }
3036 return m;
3037}
3038
fd621f36 3039//---------------------------------------------------------
5443e65e 3040
fd621f36 3041Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
3042//
3043// Returns correction factor for tilted pads geometry
3044//
5443e65e 3045
fd621f36 3046 Double_t h01 = sin(TMath::Pi() / 180.0 * fPar->GetTiltingAngle());
3047 Int_t det = c->GetDetector();
3048 Int_t plane = fGeom->GetPlane(det);
b3a5a838 3049
3050 if((plane == 1) || (plane == 3) || (plane == 5)) h01=-h01;
b8dc2353 3051
3052 if(fNoTilt) h01 = 0;
fd621f36 3053
3054 return h01;
3055}
5443e65e 3056
c630aafd 3057
3058
3059
3060
3061