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Initialization in the default constructor. Correced deletion of TObjArrays
[u/mrichter/AliRoot.git] / TRD / AliTRDtracker.cxx
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46d29e70 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
0fa7dfa7 16/* $Id$ */
bbf92647 17
029cd327 18///////////////////////////////////////////////////////////////////////////////
19// //
20// The standard TRD tracker //
21// //
22///////////////////////////////////////////////////////////////////////////////
23
a2cb5b3d 24#include <Riostream.h>
46d29e70 25#include <TFile.h>
46d29e70 26#include <TBranch.h>
5443e65e 27#include <TTree.h>
c630aafd 28#include <TObjArray.h>
46d29e70 29
46d29e70 30#include "AliTRDgeometry.h"
5443e65e 31#include "AliTRDparameter.h"
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
3c625a9b 965
1e9bb598 966 //End of propagation to the TOF
3c625a9b 967 //if (foundClr>foundMin)
968 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
969
c630aafd 970
971 }
972
973 cerr<<"Number of seeds: "<<fNseeds<<endl;
974 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
975
1e9bb598 976 fSeeds->Clear(); fNseeds=0;
977
978 return 0;
979
980}
981
982//_____________________________________________________________________________
983Int_t AliTRDtracker::RefitInward(AliESD* event)
984{
985 //
986 // Refits tracks within the TRD. The ESD event is expected to contain seeds
987 // at the outer part of the TRD.
988 // The tracks are propagated to the innermost time bin
989 // of the TRD and the ESD event is updated
990 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
991 //
992
993 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
994 Float_t foundMin = fgkMinClustersInTrack * timeBins;
995 Int_t nseed = 0;
996 Int_t found = 0;
997 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
998
999 Int_t n = event->GetNumberOfTracks();
1000 for (Int_t i=0; i<n; i++) {
1001 AliESDtrack* seed=event->GetTrack(i);
1002 ULong_t status=seed->GetStatus();
1003 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
46e2d86c 1004 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
1e9bb598 1005 nseed++;
1006
1007 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
3c625a9b 1008 seed2->ResetCovariance(5.);
1e9bb598 1009 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
46e2d86c 1010 UInt_t * indexes2 = seed2->GetIndexes();
1011 UInt_t * indexes3 = pt->GetBackupIndexes();
1012 for (Int_t i=0;i<200;i++) {
1013 if (indexes2[i]==0) break;
1014 indexes3[i] = indexes2[i];
1015 }
1016 //AliTRDtrack *pt = seed2;
1e9bb598 1017 AliTRDtrack &t=*pt;
1018 FollowProlongation(t, innerTB);
46e2d86c 1019
1020 if (t.GetNumberOfClusters()<seed->GetTRDclusters(indexes3)*0.5){
1021 // debug - why we dont go back?
1022 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1023 UInt_t * indexes2 = seed2->GetIndexes();
1024 UInt_t * indexes3 = pt2->GetBackupIndexes();
1025 for (Int_t i=0;i<200;i++) {
1026 if (indexes2[i]==0) break;
1027 indexes3[i] = indexes2[i];
1028 }
3c625a9b 1029 FollowProlongation(*pt2, innerTB);
1030 delete pt2;
46e2d86c 1031 }
1032
1e9bb598 1033 if (t.GetNumberOfClusters() >= foundMin) {
46e2d86c 1034 // UseClusters(&t);
1035 //CookLabel(pt, 1-fgkLabelFraction);
1e9bb598 1036 // t.CookdEdx();
1037 }
1038 found++;
1039// cout<<found<<'\r';
1040
1041 if(PropagateToTPC(t)) {
0fa7dfa7 1042 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
1e9bb598 1043 }
1044 delete seed2;
1045 delete pt;
1046 }
1047
1048 cout<<"Number of loaded seeds: "<<nseed<<endl;
1049 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
1050
c630aafd 1051 return 0;
1052
1053}
1054
bbf92647 1055
5443e65e 1056//---------------------------------------------------------------------------
1057Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
1058{
1059 // Starting from current position on track=t this function tries
1060 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1061 // if a close cluster is found. Returns the number of clusters
1062 // expected to be found in sensitive layers
bbf92647 1063
5443e65e 1064 Float_t wIndex, wTB, wChi2;
1065 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1066 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1067 Float_t wPx, wPy, wPz, wC;
029cd327 1068 Double_t px, py, pz;
5443e65e 1069 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
3c625a9b 1070 Int_t lastplane = GetLastPlane(&t);
46d29e70 1071
5443e65e 1072 Int_t trackIndex = t.GetLabel();
46d29e70 1073
5443e65e 1074 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
46d29e70 1075
029cd327 1076 Int_t tryAgain=fMaxGap;
46d29e70 1077
5443e65e 1078 Double_t alpha=t.GetAlpha();
c630aafd 1079 alpha = TVector2::Phi_0_2pi(alpha);
46d29e70 1080
5443e65e 1081 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
029cd327 1082 Double_t radLength, rho, x, dx, y, ymax, z;
46d29e70 1083
5443e65e 1084 Int_t expectedNumberOfClusters = 0;
1085 Bool_t lookForCluster;
46d29e70 1086
5443e65e 1087 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1088
5443e65e 1089
1090 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1091
1092 y = t.GetY(); z = t.GetZ();
1093
1094 // first propagate to the inner surface of the current time bin
029cd327 1095 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1096 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1097 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1098 y = t.GetY();
1099 ymax = x*TMath::Tan(0.5*alpha);
1100 if (y > ymax) {
1101 s = (s+1) % ns;
1102 if (!t.Rotate(alpha)) break;
029cd327 1103 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1104 } else if (y <-ymax) {
1105 s = (s-1+ns) % ns;
1106 if (!t.Rotate(-alpha)) break;
029cd327 1107 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1108 }
46d29e70 1109
5443e65e 1110 y = t.GetY(); z = t.GetZ();
1111
1112 // now propagate to the middle plane of the next time bin
029cd327 1113 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1114 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1115 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1116 y = t.GetY();
1117 ymax = x*TMath::Tan(0.5*alpha);
1118 if (y > ymax) {
1119 s = (s+1) % ns;
1120 if (!t.Rotate(alpha)) break;
029cd327 1121 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1122 } else if (y <-ymax) {
1123 s = (s-1+ns) % ns;
1124 if (!t.Rotate(-alpha)) break;
029cd327 1125 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1126 }
46d29e70 1127
46d29e70 1128
5443e65e 1129 if(lookForCluster) {
a819a5f7 1130
5443e65e 1131 expectedNumberOfClusters++;
5443e65e 1132 wIndex = (Float_t) t.GetLabel();
1133 wTB = nr;
46d29e70 1134
029cd327 1135 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
46d29e70 1136
5443e65e 1137 Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
5443e65e 1138 Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
46d29e70 1139
5443e65e 1140 Double_t road;
1141 if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
1142 else return expectedNumberOfClusters;
1143
1144 wYrt = (Float_t) y;
1145 wZrt = (Float_t) z;
1146 wYwindow = (Float_t) road;
029cd327 1147 t.GetPxPyPz(px,py,pz);
1148 wPx = (Float_t) px;
1149 wPy = (Float_t) py;
1150 wPz = (Float_t) pz;
5443e65e 1151 wC = (Float_t) t.GetC();
1152 wSigmaC2 = (Float_t) t.GetSigmaC2();
1153 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1154 wSigmaY2 = (Float_t) t.GetSigmaY2();
1155 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1156 wChi2 = -1;
1157
5443e65e 1158
1159 AliTRDcluster *cl=0;
1160 UInt_t index=0;
1161
029cd327 1162 Double_t maxChi2=fgkMaxChi2;
5443e65e 1163
1164 wYclosest = 12345678;
1165 wYcorrect = 12345678;
1166 wZclosest = 12345678;
1167 wZcorrect = 12345678;
1168 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1169
1170 // Find the closest correct cluster for debugging purposes
029cd327 1171 if (timeBin) {
a9814c09 1172 Float_t minDY = 1000000;
029cd327 1173 for (Int_t i=0; i<timeBin; i++) {
1174 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1175 if((c->GetLabel(0) != trackIndex) &&
1176 (c->GetLabel(1) != trackIndex) &&
1177 (c->GetLabel(2) != trackIndex)) continue;
1178 if(TMath::Abs(c->GetY() - y) > minDY) continue;
1179 minDY = TMath::Abs(c->GetY() - y);
1180 wYcorrect = c->GetY();
1181 wZcorrect = c->GetZ();
1182
1183 Double_t h01 = GetTiltFactor(c);
1184 wChi2 = t.GetPredictedChi2(c, h01);
1185 }
5443e65e 1186 }
46d29e70 1187
5443e65e 1188 // Now go for the real cluster search
a819a5f7 1189
029cd327 1190 if (timeBin) {
46e2d86c 1191 //
1192 //find cluster in history
1193 cl =0;
1194
1195 AliTRDcluster * cl0 = timeBin[0];
1196 if (!cl0) {
1197 continue;
1198 }
1199 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
3c625a9b 1200 if (plane>lastplane) continue;
46e2d86c 1201 Int_t timebin = cl0->GetLocalTimeBin();
1202 AliTRDcluster * cl2= GetCluster(&t,plane, timebin);
3c625a9b 1203 if (cl2) {
1204 cl =cl2;
1205 Double_t h01 = GetTiltFactor(cl);
1206 maxChi2=t.GetPredictedChi2(cl,h01);
1207 }
46e2d86c 1208 if ((!cl) && road>fgkWideRoad) {
1209 //if (t.GetNumberOfClusters()>4)
1210 // cerr<<t.GetNumberOfClusters()
1211 // <<"FindProlongation warning: Too broad road !\n";
1212 continue;
1213 }
1214
1215
1216 if(!cl){
1217
1218 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1219 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1220 if (c->GetY() > y+road) break;
1221 if (c->IsUsed() > 0) continue;
1222 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1223
1224 Double_t h01 = GetTiltFactor(c);
1225 Double_t chi2=t.GetPredictedChi2(c,h01);
1226
1227 if (chi2 > maxChi2) continue;
1228 maxChi2=chi2;
1229 cl=c;
1230 index=timeBin.GetIndex(i);
1231 }
1232 }
a9814c09 1233
1234 if(!cl) {
1235
029cd327 1236 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1237 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1238
1239 if (c->GetY() > y+road) break;
1240 if (c->IsUsed() > 0) continue;
1241 if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
1242
1243 Double_t h01 = GetTiltFactor(c);
1244 Double_t chi2=t.GetPredictedChi2(c, h01);
1245
029cd327 1246 if (chi2 > maxChi2) continue;
1247 maxChi2=chi2;
a9814c09 1248 cl=c;
029cd327 1249 index=timeBin.GetIndex(i);
a9814c09 1250 }
1251 }
a9814c09 1252 if (cl) {
1253 wYclosest = cl->GetY();
1254 wZclosest = cl->GetZ();
1255 Double_t h01 = GetTiltFactor(cl);
1256
1257 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
46e2d86c 1258 //printf("Track position\t%f\t%f\t%f\n",t.GetX(),t.GetY(),t.GetZ());
1259 //printf("Cluster position\t%d\t%f\t%f\n",cl->GetLocalTimeBin(),cl->GetY(),cl->GetZ());
3c625a9b 1260 Int_t det = cl->GetDetector();
1261 Int_t plane = fGeom->GetPlane(det);
46e2d86c 1262
3c625a9b 1263 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1264 //if(!t.Update(cl,maxChi2,index,h01)) {
1265 //if(!tryAgain--) return 0;
a9814c09 1266 }
029cd327 1267 else tryAgain=fMaxGap;
a9814c09 1268 }
1269 else {
3c625a9b 1270 //if (tryAgain==0) break;
029cd327 1271 tryAgain--;
a9814c09 1272 }
1273
1274 /*
1275 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1276
1277 printf(" %f", wIndex); //1
1278 printf(" %f", wTB); //2
1279 printf(" %f", wYrt); //3
1280 printf(" %f", wYclosest); //4
1281 printf(" %f", wYcorrect); //5
1282 printf(" %f", wYwindow); //6
1283 printf(" %f", wZrt); //7
1284 printf(" %f", wZclosest); //8
1285 printf(" %f", wZcorrect); //9
1286 printf(" %f", wZwindow); //10
1287 printf(" %f", wPx); //11
1288 printf(" %f", wPy); //12
1289 printf(" %f", wPz); //13
1290 printf(" %f", wSigmaC2*1000000); //14
1291 printf(" %f", wSigmaTgl2*1000); //15
1292 printf(" %f", wSigmaY2); //16
1293 // printf(" %f", wSigmaZ2); //17
1294 printf(" %f", wChi2); //17
1295 printf(" %f", wC); //18
1296 printf("\n");
1297 }
1298 */
5443e65e 1299 }
1300 }
1301 }
1302 return expectedNumberOfClusters;
1303
1304
1305}
a819a5f7 1306
5443e65e 1307//___________________________________________________________________
46d29e70 1308
5443e65e 1309Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
1310{
1311 // Starting from current radial position of track <t> this function
1312 // extrapolates the track up to outer timebin and in the sensitive
1313 // layers confirms prolongation if a close cluster is found.
1314 // Returns the number of clusters expected to be found in sensitive layers
46d29e70 1315
5443e65e 1316 Float_t wIndex, wTB, wChi2;
1317 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1318 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1319 Float_t wPx, wPy, wPz, wC;
029cd327 1320 Double_t px, py, pz;
5443e65e 1321 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
46d29e70 1322
5443e65e 1323 Int_t trackIndex = t.GetLabel();
029cd327 1324 Int_t tryAgain=fMaxGap;
46d29e70 1325
5443e65e 1326 Double_t alpha=t.GetAlpha();
9c9d2487 1327 TVector2::Phi_0_2pi(alpha);
46d29e70 1328
9c9d2487 1329 Int_t s;
46d29e70 1330
5443e65e 1331 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
029cd327 1332 Double_t radLength, rho, x, dx, y, ymax = 0, z;
5443e65e 1333 Bool_t lookForCluster;
a819a5f7 1334
5443e65e 1335 Int_t expectedNumberOfClusters = 0;
1336 x = t.GetX();
46d29e70 1337
5443e65e 1338 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1339
029cd327 1340 Int_t nRefPlane = fgkFirstPlane;
9c9d2487 1341 Bool_t isNewLayer = kFALSE;
46d29e70 1342
9c9d2487 1343 Double_t chi2;
1344 Double_t minDY;
3c625a9b 1345 Int_t zone =-10;
1346 Int_t nr;
1347 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
9c9d2487 1348
1349 y = t.GetY();
1350 z = t.GetZ();
46d29e70 1351
5443e65e 1352 // first propagate to the outer surface of the current time bin
46d29e70 1353
9c9d2487 1354 s = t.GetSector();
029cd327 1355 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1356 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2;
1357 y = t.GetY();
1358 z = t.GetZ();
46d29e70 1359
029cd327 1360 if(!t.PropagateTo(x,radLength,rho)) break;
3c625a9b 1361 // if (!AdjustSector(&t)) break;
1362 //
1363 // MI -fix untill correct material desription will be implemented
1364 //
1365 Float_t angle = t.GetAlpha(); // MI - if rotation - we go through the material -
9c9d2487 1366 if (!AdjustSector(&t)) break;
3c625a9b 1367 if (TMath::Abs(angle - t.GetAlpha())>0.000001) break; //better to stop track
1368 Int_t currentzone = fTrSec[s]->GetLayer(nr)->GetZone(z);
1369 if (currentzone==-10) break; // we are in the frame
1370 if (currentzone>-10){ // layer knows where we are
1371 if (zone==-10) zone = currentzone;
1372 if (zone!=currentzone) break;
1373 }
1374 //
1375 //
9c9d2487 1376 s = t.GetSector();
029cd327 1377 if (!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1378
5443e65e 1379 y = t.GetY();
9c9d2487 1380 z = t.GetZ();
a819a5f7 1381
9c9d2487 1382 // Barrel Tracks [SR, 04.04.2003]
46d29e70 1383
9c9d2487 1384 s = t.GetSector();
1385 if (fTrSec[s]->GetLayer(nr)->IsSensitive() !=
1386 fTrSec[s]->GetLayer(nr+1)->IsSensitive() ) {
46d29e70 1387
c630aafd 1388// if (IsStoringBarrel()) StoreBarrelTrack(&t, nRefPlane++, kTrackBack);
9c9d2487 1389 }
46d29e70 1390
9c9d2487 1391 if (fTrSec[s]->GetLayer(nr-1)->IsSensitive() &&
1392 ! fTrSec[s]->GetLayer(nr)->IsSensitive()) {
1393 isNewLayer = kTRUE;
1394 } else {isNewLayer = kFALSE;}
46d29e70 1395
5443e65e 1396 y = t.GetY();
9c9d2487 1397 z = t.GetZ();
a819a5f7 1398
9c9d2487 1399 // now propagate to the middle plane of the next time bin
029cd327 1400 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1401
9c9d2487 1402 x = fTrSec[s]->GetLayer(nr+1)->GetX();
029cd327 1403 if(!t.PropagateTo(x,radLength,rho)) break;
9c9d2487 1404 if (!AdjustSector(&t)) break;
1405 s = t.GetSector();
029cd327 1406 if(!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1407
9c9d2487 1408 y = t.GetY();
1409 z = t.GetZ();
1410
1411 if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
5443e65e 1412 // printf("label %d, pl %d, lookForCluster %d \n",
a9814c09 1413 // trackIndex, nr+1, lookForCluster);
5443e65e 1414
1415 if(lookForCluster) {
1416 expectedNumberOfClusters++;
1417
1418 wIndex = (Float_t) t.GetLabel();
1419 wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
1420
029cd327 1421 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
5443e65e 1422 Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
1423 Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
1424 if((t.GetSigmaY2() + sy2) < 0) break;
1425 Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
1426 Double_t y=t.GetY(), z=t.GetZ();
1427
1428 wYrt = (Float_t) y;
1429 wZrt = (Float_t) z;
1430 wYwindow = (Float_t) road;
029cd327 1431 t.GetPxPyPz(px,py,pz);
1432 wPx = (Float_t) px;
1433 wPy = (Float_t) py;
1434 wPz = (Float_t) pz;
5443e65e 1435 wC = (Float_t) t.GetC();
1436 wSigmaC2 = (Float_t) t.GetSigmaC2();
1437 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1438 wSigmaY2 = (Float_t) t.GetSigmaY2();
1439 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1440 wChi2 = -1;
1441
029cd327 1442 if (road>fgkWideRoad) {
a9814c09 1443 if (t.GetNumberOfClusters()>4)
1444 cerr<<t.GetNumberOfClusters()
1445 <<"FindProlongation warning: Too broad road !\n";
1446 return 0;
5443e65e 1447 }
1448
1449 AliTRDcluster *cl=0;
1450 UInt_t index=0;
1451
029cd327 1452 Double_t maxChi2=fgkMaxChi2;
5443e65e 1453
9c9d2487 1454 if (isNewLayer) {
1455 road = 3 * road;
1456 //sz2 = 3 * sz2;
029cd327 1457 maxChi2 = 10 * fgkMaxChi2;
9c9d2487 1458 }
1459
029cd327 1460 if (nRefPlane == fgkFirstPlane) maxChi2 = 20 * fgkMaxChi2;
1461 if (nRefPlane == fgkFirstPlane+2) maxChi2 = 15 * fgkMaxChi2;
1462 if (t.GetNRotate() > 0) maxChi2 = 3 * maxChi2;
9c9d2487 1463
1464
5443e65e 1465 wYclosest = 12345678;
1466 wYcorrect = 12345678;
1467 wZclosest = 12345678;
1468 wZcorrect = 12345678;
1469 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1470
1471 // Find the closest correct cluster for debugging purposes
029cd327 1472 if (timeBin) {
9c9d2487 1473 minDY = 1000000;
029cd327 1474 for (Int_t i=0; i<timeBin; i++) {
1475 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1476 if((c->GetLabel(0) != trackIndex) &&
1477 (c->GetLabel(1) != trackIndex) &&
1478 (c->GetLabel(2) != trackIndex)) continue;
1479 if(TMath::Abs(c->GetY() - y) > minDY) continue;
9c9d2487 1480 //minDY = TMath::Abs(c->GetY() - y);
1481 minDY = c->GetY() - y;
a9814c09 1482 wYcorrect = c->GetY();
1483 wZcorrect = c->GetZ();
1484
1485 Double_t h01 = GetTiltFactor(c);
1486 wChi2 = t.GetPredictedChi2(c, h01);
1487 }
5443e65e 1488 }
46d29e70 1489
5443e65e 1490 // Now go for the real cluster search
46d29e70 1491
029cd327 1492 if (timeBin) {
5443e65e 1493
029cd327 1494 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1495 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1496 if (c->GetY() > y+road) break;
9c9d2487 1497 if (c->IsUsed() > 0) continue;
a9814c09 1498 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1499
1500 Double_t h01 = GetTiltFactor(c);
9c9d2487 1501 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1502
029cd327 1503 if (chi2 > maxChi2) continue;
1504 maxChi2=chi2;
a9814c09 1505 cl=c;
029cd327 1506 index=timeBin.GetIndex(i);
9c9d2487 1507
1508 //check is correct
1509 if((c->GetLabel(0) != trackIndex) &&
1510 (c->GetLabel(1) != trackIndex) &&
1511 (c->GetLabel(2) != trackIndex)) t.AddNWrong();
a9814c09 1512 }
5443e65e 1513
a9814c09 1514 if(!cl) {
1515
029cd327 1516 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1517 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1518
1519 if (c->GetY() > y+road) break;
9c9d2487 1520 if (c->IsUsed() > 0) continue;
a9814c09 1521 if((c->GetZ()-z)*(c->GetZ()-z) > 2.25 * 12 * sz2) continue;
1522
1523 Double_t h01 = GetTiltFactor(c);
9c9d2487 1524 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1525
029cd327 1526 if (chi2 > maxChi2) continue;
1527 maxChi2=chi2;
a9814c09 1528 cl=c;
029cd327 1529 index=timeBin.GetIndex(i);
a9814c09 1530 }
1531 }
1532
1533 if (cl) {
1534 wYclosest = cl->GetY();
1535 wZclosest = cl->GetZ();
1536
1537 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1538 Double_t h01 = GetTiltFactor(cl);
3c625a9b 1539 Int_t det = cl->GetDetector();
1540 Int_t plane = fGeom->GetPlane(det);
1541
1542 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1543 //if(!t.Update(cl,maxChi2,index,h01)) {
029cd327 1544 if(!tryAgain--) return 0;
a9814c09 1545 }
029cd327 1546 else tryAgain=fMaxGap;
a9814c09 1547 }
1548 else {
029cd327 1549 if (tryAgain==0) break;
1550 tryAgain--;
9c9d2487 1551
1552 //if (minDY < 1000000 && isNewLayer)
1553 //cout << "\t" << nRefPlane << "\t" << "\t" << t.GetNRotate() << "\t" <<
029cd327 1554 // road << "\t" << minDY << "\t" << chi2 << "\t" << wChi2 << "\t" << maxChi2 << endl;
9c9d2487 1555
a9814c09 1556 }
1557
9c9d2487 1558 isNewLayer = kFALSE;
1559
a9814c09 1560 /*
1561 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1562
1563 printf(" %f", wIndex); //1
1564 printf(" %f", wTB); //2
1565 printf(" %f", wYrt); //3
1566 printf(" %f", wYclosest); //4
1567 printf(" %f", wYcorrect); //5
1568 printf(" %f", wYwindow); //6
1569 printf(" %f", wZrt); //7
1570 printf(" %f", wZclosest); //8
1571 printf(" %f", wZcorrect); //9
1572 printf(" %f", wZwindow); //10
1573 printf(" %f", wPx); //11
1574 printf(" %f", wPy); //12
1575 printf(" %f", wPz); //13
1576 printf(" %f", wSigmaC2*1000000); //14
1577 printf(" %f", wSigmaTgl2*1000); //15
1578 printf(" %f", wSigmaY2); //16
1579 // printf(" %f", wSigmaZ2); //17
1580 printf(" %f", wChi2); //17
1581 printf(" %f", wC); //18
1582 printf("\n");
1583 }
1584 */
5443e65e 1585 }
1586 }
1587 }
3c625a9b 1588 if (nr<outerTB)
1589 t.SetStop(kTRUE);
1590 else
1591 t.SetStop(kFALSE);
5443e65e 1592 return expectedNumberOfClusters;
9c9d2487 1593
1594
5443e65e 1595}
1596
1e9bb598 1597//---------------------------------------------------------------------------
1598Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
1599{
1600 // Starting from current position on track=t this function tries
1601 // to extrapolate the track up to timeBin=0 and to reuse already
1602 // assigned clusters. Returns the number of clusters
1603 // expected to be found in sensitive layers
1604 // get indices of assigned clusters for each layer
1605 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1606
1607 Int_t iCluster[90];
1608 for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
1609 for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
1610 Int_t index = t.GetClusterIndex(i);
1611 AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
1612 if (!cl) continue;
1613 Int_t detector=cl->GetDetector();
1614 Int_t localTimeBin=cl->GetLocalTimeBin();
1615 Int_t sector=fGeom->GetSector(detector);
1616 Int_t plane=fGeom->GetPlane(detector);
1617
1618 Int_t trackingSector = CookSectorIndex(sector);
1619
1620 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1621 if(gtb < 0) continue;
1622 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1623 iCluster[layer] = index;
1624 }
1625 t.ResetClusters();
1626
1627 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1628
1629 Double_t alpha=t.GetAlpha();
1630 alpha = TVector2::Phi_0_2pi(alpha);
1631
1632 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1633 Double_t radLength, rho, x, dx, y, ymax, z;
1634
1635 Int_t expectedNumberOfClusters = 0;
1636 Bool_t lookForCluster;
1637
1638 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1639
1640
1641 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1642
1643 y = t.GetY(); z = t.GetZ();
1644
1645 // first propagate to the inner surface of the current time bin
1646 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1647 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1648 if(!t.PropagateTo(x,radLength,rho)) break;
1649 y = t.GetY();
1650 ymax = x*TMath::Tan(0.5*alpha);
1651 if (y > ymax) {
1652 s = (s+1) % ns;
1653 if (!t.Rotate(alpha)) break;
1654 if(!t.PropagateTo(x,radLength,rho)) break;
1655 } else if (y <-ymax) {
1656 s = (s-1+ns) % ns;
1657 if (!t.Rotate(-alpha)) break;
1658 if(!t.PropagateTo(x,radLength,rho)) break;
1659 }
1660
1661 y = t.GetY(); z = t.GetZ();
1662
1663 // now propagate to the middle plane of the next time bin
1664 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1665 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1666 if(!t.PropagateTo(x,radLength,rho)) break;
1667 y = t.GetY();
1668 ymax = x*TMath::Tan(0.5*alpha);
1669 if (y > ymax) {
1670 s = (s+1) % ns;
1671 if (!t.Rotate(alpha)) break;
1672 if(!t.PropagateTo(x,radLength,rho)) break;
1673 } else if (y <-ymax) {
1674 s = (s-1+ns) % ns;
1675 if (!t.Rotate(-alpha)) break;
1676 if(!t.PropagateTo(x,radLength,rho)) break;
1677 }
1678
1679 if(lookForCluster) expectedNumberOfClusters++;
1680
1681 // use assigned cluster
1682 if (!iCluster[nr-1]) continue;
1683 AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
1684 Double_t h01 = GetTiltFactor(cl);
1685 Double_t chi2=t.GetPredictedChi2(cl, h01);
1686 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1687 t.Update(cl,chi2,iCluster[nr-1],h01);
1688 }
1689
1690 return expectedNumberOfClusters;
1691}
1692
5443e65e 1693//___________________________________________________________________
1694
1695Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
1696{
1697 // Starting from current radial position of track <t> this function
1698 // extrapolates the track up to radial position <xToGo>.
1699 // Returns 1 if track reaches the plane, and 0 otherwise
1700
1701 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1702
1703 Double_t alpha=t.GetAlpha();
1704
1705 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1706 if (alpha < 0. ) alpha += 2.*TMath::Pi();
1707
1708 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1709
1710 Bool_t lookForCluster;
029cd327 1711 Double_t radLength, rho, x, dx, y, ymax, z;
5443e65e 1712
1713 x = t.GetX();
1714
1715 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1716
1717 Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
1718
1719 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
1720
1721 y = t.GetY(); z = t.GetZ();
1722
1723 // first propagate to the outer surface of the current time bin
029cd327 1724 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1725 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1726 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1727 y = t.GetY();
1728 ymax = x*TMath::Tan(0.5*alpha);
1729 if (y > ymax) {
1730 s = (s+1) % ns;
1731 if (!t.Rotate(alpha)) return 0;
1732 } else if (y <-ymax) {
1733 s = (s-1+ns) % ns;
1734 if (!t.Rotate(-alpha)) return 0;
1735 }
029cd327 1736 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1737
1738 y = t.GetY(); z = t.GetZ();
1739
1740 // now propagate to the middle plane of the next time bin
029cd327 1741 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1742 x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1743 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1744 y = t.GetY();
1745 ymax = x*TMath::Tan(0.5*alpha);
1746 if (y > ymax) {
1747 s = (s+1) % ns;
1748 if (!t.Rotate(alpha)) return 0;
1749 } else if (y <-ymax) {
1750 s = (s-1+ns) % ns;
1751 if (!t.Rotate(-alpha)) return 0;
1752 }
029cd327 1753 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1754 }
1755 return 1;
1756}
1757
1758//___________________________________________________________________
1759
1760Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
1761{
1762 // Starting from current radial position of track <t> this function
1763 // extrapolates the track up to radial position of the outermost
1764 // padrow of the TPC.
1765 // Returns 1 if track reaches the TPC, and 0 otherwise
1766
c630aafd 1767 //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
5443e65e 1768
1769 Double_t alpha=t.GetAlpha();
c630aafd 1770 alpha = TVector2::Phi_0_2pi(alpha);
5443e65e 1771
1772 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1773
1774 Bool_t lookForCluster;
029cd327 1775 Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
5443e65e 1776
1777 x = t.GetX();
1778
1779 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
5443e65e 1780 Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
1781
1782 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
1783
9c9d2487 1784 y = t.GetY();
1785 z = t.GetZ();
5443e65e 1786
1787 // first propagate to the outer surface of the current time bin
029cd327 1788 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1789 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
1790
029cd327 1791 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1792 AdjustSector(&t);
029cd327 1793 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1794
9c9d2487 1795 y = t.GetY();
1796 z = t.GetZ();
5443e65e 1797
1798 // now propagate to the middle plane of the next time bin
029cd327 1799 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1800 x = fTrSec[s]->GetLayer(nr-1)->GetX();
1801
029cd327 1802 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1803 AdjustSector(&t);
029cd327 1804 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1805 }
1806 return 1;
1807}
1808
5443e65e 1809void AliTRDtracker::LoadEvent()
1810{
1811 // Fills clusters into TRD tracking_sectors
1812 // Note that the numbering scheme for the TRD tracking_sectors
1813 // differs from that of TRD sectors
1814
1815 ReadClusters(fClusters);
1816 Int_t ncl=fClusters->GetEntriesFast();
1817 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1818
1819 UInt_t index;
1820 while (ncl--) {
e24ea474 1821// printf("\r %d left ",ncl);
5443e65e 1822 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1823 Int_t detector=c->GetDetector();
1824 Int_t localTimeBin=c->GetLocalTimeBin();
5443e65e 1825 Int_t sector=fGeom->GetSector(detector);
1826 Int_t plane=fGeom->GetPlane(detector);
1827
029cd327 1828 Int_t trackingSector = CookSectorIndex(sector);
5443e65e 1829
029cd327 1830 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
b3a5a838 1831 if(gtb < 0) continue;
029cd327 1832 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
5443e65e 1833
1834 index=ncl;
029cd327 1835 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
5443e65e 1836 }
1837 printf("\r\n");
1838
1839}
1840
c630aafd 1841//_____________________________________________________________________________
1842Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1843{
1844 // Fills clusters into TRD tracking_sectors
1845 // Note that the numbering scheme for the TRD tracking_sectors
1846 // differs from that of TRD sectors
1847
1848 if (ReadClusters(fClusters,cTree)) {
1849 Error("LoadClusters","Problem with reading the clusters !");
1850 return 1;
1851 }
1852 Int_t ncl=fClusters->GetEntriesFast();
1853 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1854
1855 UInt_t index;
3c625a9b 1856 for (Int_t ichamber=0;ichamber<5;ichamber++)
1857 for (Int_t isector=0;isector<18;isector++){
1858 fHoles[ichamber][isector]=kTRUE;
1859 }
1860
1861
c630aafd 1862 while (ncl--) {
1863// printf("\r %d left ",ncl);
1864 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1865 Int_t detector=c->GetDetector();
1866 Int_t localTimeBin=c->GetLocalTimeBin();
c630aafd 1867 Int_t sector=fGeom->GetSector(detector);
1868 Int_t plane=fGeom->GetPlane(detector);
3c625a9b 1869
029cd327 1870 Int_t trackingSector = CookSectorIndex(sector);
3c625a9b 1871 if (c->GetLabel(0)>0){
1872 Int_t chamber = fGeom->GetChamber(detector);
1873 fHoles[chamber][trackingSector]=kFALSE;
1874 }
c630aafd 1875
029cd327 1876 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
c630aafd 1877 if(gtb < 0) continue;
029cd327 1878 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
c630aafd 1879
1880 index=ncl;
029cd327 1881 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
c630aafd 1882 }
1883 printf("\r\n");
3c625a9b 1884 //
1885 //
1886 /*
1887 for (Int_t isector=0;isector<18;isector++){
1888 for (Int_t ichamber=0;ichamber<5;ichamber++)
1889 if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
1890 printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
1891 fGeom->IsHole(0,ichamber,17-isector));
1892 }
1893 */
c630aafd 1894 return 0;
1895}
1896
5443e65e 1897//_____________________________________________________________________________
1898void AliTRDtracker::UnloadEvent()
1899{
1900 //
1901 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1902 //
1903
1904 Int_t i, nentr;
1905
1906 nentr = fClusters->GetEntriesFast();
1907 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1908
1909 nentr = fSeeds->GetEntriesFast();
1910 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1911
1912 nentr = fTracks->GetEntriesFast();
1913 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1914
1915 Int_t nsec = AliTRDgeometry::kNsect;
1916
1917 for (i = 0; i < nsec; i++) {
1918 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1919 fTrSec[i]->GetLayer(pl)->Clear();
1920 }
1921 }
1922
1923}
1924
1925//__________________________________________________________________________
1926void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
1927{
1928 // Creates track seeds using clusters in timeBins=i1,i2
1929
1930 if(turn > 2) {
1931 cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
1932 return;
1933 }
1934
1935 Double_t x[5], c[15];
029cd327 1936 Int_t maxSec=AliTRDgeometry::kNsect;
5443e65e 1937
1938 Double_t alpha=AliTRDgeometry::GetAlpha();
1939 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
1940 Double_t cs=cos(alpha), sn=sin(alpha);
1941 Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
1942
1943
1944 Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
1945 Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
1946
1947 Double_t x1 =fTrSec[0]->GetX(i1);
1948 Double_t xx2=fTrSec[0]->GetX(i2);
1949
029cd327 1950 for (Int_t ns=0; ns<maxSec; ns++) {
5443e65e 1951
029cd327 1952 Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1953 Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
5443e65e 1954 Int_t nm=(*fTrSec[ns]->GetLayer(i2));
029cd327 1955 Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1956 Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
5443e65e 1957
1958 AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
1959
1960 for (Int_t is=0; is < r1; is++) {
1961 Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
1962
1963 for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
a9814c09 1964
1965 const AliTRDcluster *cl;
1966 Double_t x2, y2, z2;
1967 Double_t x3=0., y3=0.;
1968
1969 if (js<nl2) {
1970 if(turn != 2) continue;
029cd327 1971 AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1972 cl=r2[js];
1973 y2=cl->GetY(); z2=cl->GetZ();
1974
1975 x2= xx2*cs2+y2*sn2;
1976 y2=-xx2*sn2+y2*cs2;
1977 }
1978 else if (js<nl2+nl) {
1979 if(turn != 1) continue;
029cd327 1980 AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1981 cl=r2[js-nl2];
1982 y2=cl->GetY(); z2=cl->GetZ();
1983
1984 x2= xx2*cs+y2*sn;
1985 y2=-xx2*sn+y2*cs;
1986 }
1987 else if (js<nl2+nl+nm) {
1988 if(turn != 1) continue;
1989 AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
1990 cl=r2[js-nl2-nl];
1991 x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
1992 }
1993 else if (js<nl2+nl+nm+nu) {
1994 if(turn != 1) continue;
029cd327 1995 AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
a9814c09 1996 cl=r2[js-nl2-nl-nm];
1997 y2=cl->GetY(); z2=cl->GetZ();
1998
1999 x2=xx2*cs-y2*sn;
2000 y2=xx2*sn+y2*cs;
2001 }
2002 else {
2003 if(turn != 2) continue;
029cd327 2004 AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
a9814c09 2005 cl=r2[js-nl2-nl-nm-nu];
2006 y2=cl->GetY(); z2=cl->GetZ();
2007
2008 x2=xx2*cs2-y2*sn2;
2009 y2=xx2*sn2+y2*cs2;
2010 }
2011
029cd327 2012 if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
a9814c09 2013
2014 Double_t zz=z1 - z1/x1*(x1-x2);
2015
029cd327 2016 if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
a9814c09 2017
2018 Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
2019 if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
2020
2021 x[0]=y1;
2022 x[1]=z1;
2023 x[4]=f1trd(x1,y1,x2,y2,x3,y3);
2024
029cd327 2025 if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
a9814c09 2026
2027 x[2]=f2trd(x1,y1,x2,y2,x3,y3);
2028
2029 if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
2030
2031 x[3]=f3trd(x1,y1,x2,y2,z1,z2);
2032
029cd327 2033 if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
a9814c09 2034
2035 Double_t a=asin(x[2]);
2036 Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
2037
029cd327 2038 if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
a9814c09 2039
2040 Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
2041 Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
029cd327 2042 Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
a9814c09 2043
2044 // Tilt changes
2045 Double_t h01 = GetTiltFactor(r1[is]);
029cd327 2046 Double_t xuFactor = 100.;
b8dc2353 2047 if(fNoTilt) {
2048 h01 = 0;
029cd327 2049 xuFactor = 1;
b8dc2353 2050 }
2051
fd621f36 2052 sy1=sy1+sz1*h01*h01;
b3a5a838 2053 Double_t syz=sz1*(-h01);
a9814c09 2054 // end of tilt changes
2055
b3a5a838 2056 Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
2057 Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
2058 Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
2059 Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
2060 Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
2061 Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
2062 Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
2063 Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
2064 Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
2065 Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
2066
a9814c09 2067
b3a5a838 2068 c[0]=sy1;
a9814c09 2069 // c[1]=0.; c[2]=sz1;
029cd327 2070 c[1]=syz; c[2]=sz1*xuFactor;
b3a5a838 2071 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
2072 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
2073 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
2074 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
2075 c[13]=f30*sy1*f40+f32*sy2*f42;
2076 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
a9814c09 2077
2078 UInt_t index=r1.GetIndex(is);
2079
2080 AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
2081
2082 Int_t rc=FollowProlongation(*track, i2);
2083
2084 if ((rc < 1) ||
2085 (track->GetNumberOfClusters() <
029cd327 2086 (outer-inner)*fgkMinClustersInSeed)) delete track;
a9814c09 2087 else {
2088 fSeeds->AddLast(track); fNseeds++;
e24ea474 2089// cerr<<"\r found seed "<<fNseeds;
a9814c09 2090 }
5443e65e 2091 }
2092 }
2093 }
2094}
2095
2096//_____________________________________________________________________________
c630aafd 2097Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree)
5443e65e 2098{
2099 //
a819a5f7 2100 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2101 // from the file. The names of the cluster tree and branches
2102 // should match the ones used in AliTRDclusterizer::WriteClusters()
2103 //
029cd327 2104 TObjArray *clusterArray = new TObjArray(400);
5443e65e 2105
c630aafd 2106 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2107 if (!branch) {
2108 Error("ReadClusters","Can't get the branch !");
2109 return 1;
2110 }
029cd327 2111 branch->SetAddress(&clusterArray);
5443e65e 2112
2113 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2114 printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
a819a5f7 2115
a819a5f7 2116 // Loop through all entries in the tree
2117 Int_t nbytes;
2118 AliTRDcluster *c = 0;
5443e65e 2119 printf("\n");
a819a5f7 2120
2121 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2122
2123 // Import the tree
5443e65e 2124 nbytes += ClusterTree->GetEvent(iEntry);
2125
a819a5f7 2126 // Get the number of points in the detector
029cd327 2127 Int_t nCluster = clusterArray->GetEntriesFast();
e24ea474 2128// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 2129
a819a5f7 2130 // Loop through all TRD digits
2131 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2132 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
a819a5f7 2133 AliTRDcluster *co = new AliTRDcluster(*c);
2134 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
5443e65e 2135 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 2136 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2137 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
a819a5f7 2138 array->AddLast(co);
029cd327 2139 delete clusterArray->RemoveAt(iCluster);
a819a5f7 2140 }
2141 }
2142
029cd327 2143 delete clusterArray;
5443e65e 2144
c630aafd 2145 return 0;
a819a5f7 2146}
2147
5443e65e 2148//______________________________________________________________________
2149void AliTRDtracker::ReadClusters(TObjArray *array, const Char_t *filename)
a819a5f7 2150{
2151 //
5443e65e 2152 // Reads AliTRDclusters from file <filename>. The names of the cluster
2153 // tree and branches should match the ones used in
2154 // AliTRDclusterizer::WriteClusters()
2155 // if <array> == 0, clusters are added into AliTRDtracker fCluster array
a819a5f7 2156 //
2157
5443e65e 2158 TDirectory *savedir=gDirectory;
46d29e70 2159
5443e65e 2160 TFile *file = TFile::Open(filename);
2161 if (!file->IsOpen()) {
2162 cerr<<"Can't open file with TRD clusters"<<endl;
2163 return;
2164 }
46d29e70 2165
5443e65e 2166 Char_t treeName[12];
e24ea474 2167 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
029cd327 2168 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
46d29e70 2169
029cd327 2170 if (!clusterTree) {
5443e65e 2171 cerr<<"AliTRDtracker::ReadClusters(): ";
2172 cerr<<"can't get a tree with clusters !\n";
2173 return;
2174 }
46d29e70 2175
029cd327 2176 TObjArray *clusterArray = new TObjArray(400);
46d29e70 2177
029cd327 2178 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
46d29e70 2179
029cd327 2180 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2181 cout<<"found "<<nEntries<<" in clusterTree"<<endl;
a819a5f7 2182
5443e65e 2183 // Loop through all entries in the tree
2184 Int_t nbytes;
2185 AliTRDcluster *c = 0;
bbf92647 2186
5443e65e 2187 printf("\n");
bbf92647 2188
5443e65e 2189 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
46d29e70 2190
5443e65e 2191 // Import the tree
029cd327 2192 nbytes += clusterTree->GetEvent(iEntry);
0a29d0f1 2193
5443e65e 2194 // Get the number of points in the detector
029cd327 2195 Int_t nCluster = clusterArray->GetEntriesFast();
b3a5a838 2196 printf("\n Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 2197
2198 // Loop through all TRD digits
2199 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2200 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
5443e65e 2201 AliTRDcluster *co = new AliTRDcluster(*c);
2202 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2203 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 2204 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2205 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
5443e65e 2206 array->AddLast(co);
029cd327 2207 delete clusterArray->RemoveAt(iCluster);
5443e65e 2208 }
46d29e70 2209 }
0a29d0f1 2210
5443e65e 2211 file->Close();
029cd327 2212 delete clusterArray;
5443e65e 2213 savedir->cd();
2214
2215}
2216
c630aafd 2217void AliTRDtracker::ReadClusters(TObjArray *array, const TFile *inp)
2218{
2219 //
2220 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2221 // from the file. The names of the cluster tree and branches
2222 // should match the ones used in AliTRDclusterizer::WriteClusters()
2223 //
2224
2225 TDirectory *savedir=gDirectory;
2226
2227 if (inp) {
2228 TFile *in=(TFile*)inp;
2229 if (!in->IsOpen()) {
2230 cerr<<"AliTRDtracker::ReadClusters(): input file is not open !\n";
2231 return;
2232 }
2233 else{
2234 in->cd();
2235 }
2236 }
2237
2238 Char_t treeName[12];
2239 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
029cd327 2240 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
c630aafd 2241
029cd327 2242 TObjArray *clusterArray = new TObjArray(400);
c630aafd 2243
029cd327 2244 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
c630aafd 2245
029cd327 2246 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2247 printf("found %d entries in %s.\n",nEntries,clusterTree->GetName());
c630aafd 2248
2249 // Loop through all entries in the tree
2250 Int_t nbytes;
2251 AliTRDcluster *c = 0;
2252 printf("\n");
2253
2254 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2255
2256 // Import the tree
029cd327 2257 nbytes += clusterTree->GetEvent(iEntry);
c630aafd 2258
2259 // Get the number of points in the detector
029cd327 2260 Int_t nCluster = clusterArray->GetEntriesFast();
c630aafd 2261// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2262
2263 // Loop through all TRD digits
2264 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2265 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
c630aafd 2266 AliTRDcluster *co = new AliTRDcluster(*c);
2267 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2268 Int_t ltb = co->GetLocalTimeBin();
2269 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2270 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
2271 array->AddLast(co);
029cd327 2272 delete clusterArray->RemoveAt(iCluster);
c630aafd 2273 }
2274 }
2275
029cd327 2276 delete clusterArray;
c630aafd 2277 savedir->cd();
2278
2279}
46d29e70 2280
2281//__________________________________________________________________
029cd327 2282void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2283{
2284 //
2285 // This cooks a label. Mmmmh, smells good...
2286 //
46d29e70 2287
2288 Int_t label=123456789, index, i, j;
5443e65e 2289 Int_t ncl=pt->GetNumberOfClusters();
029cd327 2290 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
5443e65e 2291
029cd327 2292 Bool_t labelAdded;
46d29e70 2293
029cd327 2294 // Int_t s[kRange][2];
2295 Int_t **s = new Int_t* [kRange];
2296 for (i=0; i<kRange; i++) {
d1b06c24 2297 s[i] = new Int_t[2];
2298 }
029cd327 2299 for (i=0; i<kRange; i++) {
46d29e70 2300 s[i][0]=-1;
2301 s[i][1]=0;
2302 }
2303
2304 Int_t t0,t1,t2;
2305 for (i=0; i<ncl; i++) {
5443e65e 2306 index=pt->GetClusterIndex(i);
46d29e70 2307 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
5443e65e 2308 t0=c->GetLabel(0);
2309 t1=c->GetLabel(1);
2310 t2=c->GetLabel(2);
46d29e70 2311 }
2312
2313 for (i=0; i<ncl; i++) {
5443e65e 2314 index=pt->GetClusterIndex(i);
46d29e70 2315 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2316 for (Int_t k=0; k<3; k++) {
5443e65e 2317 label=c->GetLabel(k);
029cd327 2318 labelAdded=kFALSE; j=0;
46d29e70 2319 if (label >= 0) {
029cd327 2320 while ( (!labelAdded) && ( j < kRange ) ) {
a9814c09 2321 if (s[j][0]==label || s[j][1]==0) {
2322 s[j][0]=label;
2323 s[j][1]=s[j][1]+1;
029cd327 2324 labelAdded=kTRUE;
a9814c09 2325 }
2326 j++;
2327 }
46d29e70 2328 }
2329 }
2330 }
2331
46d29e70 2332 Int_t max=0;
2333 label = -123456789;
2334
029cd327 2335 for (i=0; i<kRange; i++) {
46d29e70 2336 if (s[i][1]>max) {
2337 max=s[i][1]; label=s[i][0];
2338 }
2339 }
5443e65e 2340
029cd327 2341 for (i=0; i<kRange; i++) {
5443e65e 2342 delete []s[i];
2343 }
2344
d1b06c24 2345 delete []s;
5443e65e 2346
2347 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
2348
2349 pt->SetLabel(label);
2350
46d29e70 2351}
2352
c630aafd 2353
5443e65e 2354//__________________________________________________________________
029cd327 2355void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2356{
2357 //
2358 // Use clusters, but don't abuse them!
2359 //
2360
5443e65e 2361 Int_t ncl=t->GetNumberOfClusters();
2362 for (Int_t i=from; i<ncl; i++) {
2363 Int_t index = t->GetClusterIndex(i);
2364 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2365 c->Use();
2366 }
2367}
2368
2369
2370//_____________________________________________________________________
029cd327 2371Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
5443e65e 2372{
2373 // Parametrised "expected" error of the cluster reconstruction in Y
2374
2375 Double_t s = 0.08 * 0.08;
2376 return s;
2377}
2378
2379//_____________________________________________________________________
029cd327 2380Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
0a29d0f1 2381{
5443e65e 2382 // Parametrised "expected" error of the cluster reconstruction in Z
2383
a9814c09 2384 Double_t s = 9 * 9 /12.;
5443e65e 2385 return s;
2386}
2387
5443e65e 2388//_____________________________________________________________________
029cd327 2389Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
5443e65e 2390{
2391 //
029cd327 2392 // Returns radial position which corresponds to time bin <localTB>
5443e65e 2393 // in tracking sector <sector> and plane <plane>
2394 //
2395
029cd327 2396 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
5443e65e 2397 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2398 return fTrSec[sector]->GetLayer(pl)->GetX();
2399
2400}
2401
c630aafd 2402
5443e65e 2403//_______________________________________________________
2404AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
029cd327 2405 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
5443e65e 2406{
0a29d0f1 2407 //
5443e65e 2408 // AliTRDpropagationLayer constructor
0a29d0f1 2409 //
46d29e70 2410
029cd327 2411 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
2412 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
5443e65e 2413
46d29e70 2414
029cd327 2415 for(Int_t i=0; i < (Int_t) kZones; i++) {
5443e65e 2416 fZc[i]=0; fZmax[i] = 0;
a819a5f7 2417 }
5443e65e 2418
2419 fYmax = 0;
2420
2421 if(fTimeBinIndex >= 0) {
029cd327 2422 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2423 fIndex = new UInt_t[kMaxClusterPerTimeBin];
a819a5f7 2424 }
46d29e70 2425
3c625a9b 2426 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
5443e65e 2427 fHole = kFALSE;
2428 fHoleZc = 0;
2429 fHoleZmax = 0;
2430 fHoleYc = 0;
2431 fHoleYmax = 0;
2432 fHoleRho = 0;
2433 fHoleX0 = 0;
2434
2435}
2436
2437//_______________________________________________________
2438void AliTRDtracker::AliTRDpropagationLayer::SetHole(
a9814c09 2439 Double_t Zmax, Double_t Ymax, Double_t rho,
029cd327 2440 Double_t radLength, Double_t Yc, Double_t Zc)
5443e65e 2441{
2442 //
2443 // Sets hole in the layer
2444 //
5443e65e 2445 fHole = kTRUE;
2446 fHoleZc = Zc;
2447 fHoleZmax = Zmax;
2448 fHoleYc = Yc;
2449 fHoleYmax = Ymax;
2450 fHoleRho = rho;
029cd327 2451 fHoleX0 = radLength;
5443e65e 2452}
2453
46d29e70 2454
5443e65e 2455//_______________________________________________________
2456AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
2457{
2458 //
2459 // AliTRDtrackingSector Constructor
2460 //
2461
2462 fGeom = geo;
2463 fPar = par;
2464 fGeomSector = gs;
2465 fTzeroShift = 0.13;
2466 fN = 0;
3c625a9b 2467 //
2468 // get holes description from geometry
2469 Bool_t holes[AliTRDgeometry::kNcham];
2470 //printf("sector\t%d\t",gs);
2471 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
2472 holes[icham] = fGeom->IsHole(0,icham,gs);
2473 //printf("%d",holes[icham]);
2474 }
2475 //printf("\n");
2476
029cd327 2477 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
5443e65e 2478
2479
2480 AliTRDpropagationLayer* ppl;
2481
029cd327 2482 Double_t x, xin, xout, dx, rho, radLength;
5443e65e 2483 Int_t steps;
46d29e70 2484
5443e65e 2485 // set time bins in the gas of the TPC
46d29e70 2486
5443e65e 2487 xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
029cd327 2488 rho = 0.9e-3; radLength = 28.94;
5443e65e 2489
2490 for(Int_t i=0; i<steps; i++) {
2491 x = xin + i*dx + dx/2;
029cd327 2492 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2493 InsertLayer(ppl);
46d29e70 2494 }
2495
5443e65e 2496 // set time bins in the outer field cage vessel
46d29e70 2497
029cd327 2498 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2499 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2500 InsertLayer(ppl);
46d29e70 2501
029cd327 2502 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2503 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2504 InsertLayer(ppl);
2505
029cd327 2506 dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2507 steps = 5; dx = (xout - xin)/steps;
2508 for(Int_t i=0; i<steps; i++) {
2509 x = xin + i*dx + dx/2;
029cd327 2510 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2511 InsertLayer(ppl);
2512 }
2513
029cd327 2514 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2515 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2516 InsertLayer(ppl);
2517
029cd327 2518 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2519 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2520 InsertLayer(ppl);
0a29d0f1 2521
5443e65e 2522
2523 // set time bins in CO2
2524
2525 xin = xout; xout = 275.0;
2526 steps = 50; dx = (xout - xin)/steps;
029cd327 2527 rho = 1.977e-3; radLength = 36.2;
5443e65e 2528
2529 for(Int_t i=0; i<steps; i++) {
2530 x = xin + i*dx + dx/2;
029cd327 2531 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2532 InsertLayer(ppl);
2533 }
2534
2535 // set time bins in the outer containment vessel
2536
029cd327 2537 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2538 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2539 InsertLayer(ppl);
2540
029cd327 2541 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2542 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2543 InsertLayer(ppl);
2544
029cd327 2545 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2546 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2547 InsertLayer(ppl);
2548
029cd327 2549 dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2550 steps = 10; dx = (xout - xin)/steps;
2551 for(Int_t i=0; i<steps; i++) {
2552 x = xin + i*dx + dx/2;
029cd327 2553 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2554 InsertLayer(ppl);
2555 }
2556
029cd327 2557 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2558 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2559 InsertLayer(ppl);
2560
029cd327 2561 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2562 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2563 InsertLayer(ppl);
2564
029cd327 2565 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2566 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2567 InsertLayer(ppl);
2568
2569 Double_t xtrd = (Double_t) fGeom->Rmin();
2570
2571 // add layers between TPC and TRD (Air temporarily)
2572 xin = xout; xout = xtrd;
2573 steps = 50; dx = (xout - xin)/steps;
029cd327 2574 rho = 1.2e-3; radLength = 36.66;
5443e65e 2575
2576 for(Int_t i=0; i<steps; i++) {
2577 x = xin + i*dx + dx/2;
029cd327 2578 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2579 InsertLayer(ppl);
2580 }
2581
2582
3c625a9b 2583 // Double_t alpha=AliTRDgeometry::GetAlpha();
5443e65e 2584
2585 // add layers for each of the planes
2586
2587 Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
2588 Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
2589 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2590 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2591 Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
2592 Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
2593 Double_t dxPlane = dxTEC + dxSpace;
2594
029cd327 2595 Int_t tb, tbIndex;
2596 const Int_t kNchambers = AliTRDgeometry::Ncham();
3c625a9b 2597 Double_t ymax = 0;
2598 //, holeYmax = 0;
2599 Double_t ymaxsensitive=0;
029cd327 2600 Double_t *zc = new Double_t[kNchambers];
2601 Double_t *zmax = new Double_t[kNchambers];
3c625a9b 2602 Double_t *zmaxsensitive = new Double_t[kNchambers];
2603 // Double_t holeZmax = 1000.; // the whole sector is missing
5443e65e 2604
5443e65e 2605 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3c625a9b 2606 //
5443e65e 2607 // Radiator
2608 xin = xtrd + plane * dxPlane; xout = xin + dxRad;
029cd327 2609 steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2610 for(Int_t i=0; i<steps; i++) {
2611 x = xin + i*dx + dx/2;
3c625a9b 2612 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2613 InsertLayer(ppl);
2614 }
2615
3c625a9b 2616 ymax = fGeom->GetChamberWidth(plane)/2.;
2617 ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
2618
029cd327 2619 for(Int_t ch = 0; ch < kNchambers; ch++) {
2620 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
5443e65e 2621 Float_t pad = fPar->GetRowPadSize(plane,ch,0);
2622 Float_t row0 = fPar->GetRow0(plane,ch,0);
2623 Int_t nPads = fPar->GetRowMax(plane,ch,0);
857b3eb0 2624 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
3c625a9b 2625 // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
2626 zc[ch] = (pad * nPads)/2 + row0;
2627 //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
2628
5443e65e 2629 }
2630
2631 dx = fPar->GetTimeBinSize();
029cd327 2632 rho = 0.00295 * 0.85; radLength = 11.0;
5443e65e 2633
2634 Double_t x0 = (Double_t) fPar->GetTime0(plane);
2635 Double_t xbottom = x0 - dxDrift;
2636 Double_t xtop = x0 + dxAmp;
3c625a9b 2637 //
5443e65e 2638 // Amplification region
5443e65e 2639 steps = (Int_t) (dxAmp/dx);
2640
2641 for(tb = 0; tb < steps; tb++) {
2642 x = x0 + tb * dx + dx/2;
029cd327 2643 tbIndex = CookTimeBinIndex(plane, -tb-1);
2644 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2645 ppl->SetYmax(ymax,ymaxsensitive);
2646 ppl->SetZ(zc, zmax, zmaxsensitive);
2647 ppl->SetHoles(holes);
5443e65e 2648 InsertLayer(ppl);
2649 }
029cd327 2650 tbIndex = CookTimeBinIndex(plane, -steps);
5443e65e 2651 x = (x + dx/2 + xtop)/2;
2652 dx = 2*(xtop-x);
029cd327 2653 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2654 ppl->SetYmax(ymax,ymaxsensitive);
2655 ppl->SetZ(zc, zmax,zmaxsensitive);
2656 ppl->SetHoles(holes);
5443e65e 2657 InsertLayer(ppl);
2658
2659 // Drift region
2660 dx = fPar->GetTimeBinSize();
2661 steps = (Int_t) (dxDrift/dx);
2662
2663 for(tb = 0; tb < steps; tb++) {
2664 x = x0 - tb * dx - dx/2;
029cd327 2665 tbIndex = CookTimeBinIndex(plane, tb);
5443e65e 2666
029cd327 2667 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2668 ppl->SetYmax(ymax,ymaxsensitive);
2669 ppl->SetZ(zc, zmax, zmaxsensitive);
2670 ppl->SetHoles(holes);
5443e65e 2671 InsertLayer(ppl);
2672 }
029cd327 2673 tbIndex = CookTimeBinIndex(plane, steps);
5443e65e 2674 x = (x - dx/2 + xbottom)/2;
2675 dx = 2*(x-xbottom);
029cd327 2676 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2677 ppl->SetYmax(ymax,ymaxsensitive);
2678 ppl->SetZ(zc, zmax, zmaxsensitive);
2679 ppl->SetHoles(holes);
5443e65e 2680 InsertLayer(ppl);
2681
2682 // Pad Plane
029cd327 2683 xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
2684 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3c625a9b 2685 ppl->SetYmax(ymax,ymaxsensitive);
2686 ppl->SetZ(zc, zmax,zmax);
2687 ppl->SetHoles(holes);
5443e65e 2688 InsertLayer(ppl);
2689
2690 // Rohacell
2691 xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
029cd327 2692 steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2693 for(Int_t i=0; i<steps; i++) {
2694 x = xin + i*dx + dx/2;
029cd327 2695 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3c625a9b 2696 ppl->SetYmax(ymax,ymaxsensitive);
2697 ppl->SetZ(zc, zmax,zmax);
2698 ppl->SetHoles(holes);
5443e65e 2699 InsertLayer(ppl);
2700 }
2701
2702 // Space between the chambers, air
2703 xin = xout; xout = xtrd + (plane + 1) * dxPlane;
029cd327 2704 steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2705 for(Int_t i=0; i<steps; i++) {
2706 x = xin + i*dx + dx/2;
029cd327 2707 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2708 InsertLayer(ppl);
2709 }
2710 }
2711
2712 // Space between the TRD and RICH
2713 Double_t xRICH = 500.;
2714 xin = xout; xout = xRICH;
029cd327 2715 steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2716 for(Int_t i=0; i<steps; i++) {
2717 x = xin + i*dx + dx/2;
029cd327 2718 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2719 InsertLayer(ppl);
2720 }
2721
2722 MapTimeBinLayers();
029cd327 2723 delete [] zc;
2724 delete [] zmax;
5443e65e 2725
2726}
2727
2728//______________________________________________________
2729
029cd327 2730Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
5443e65e 2731{
2732 //
2733 // depending on the digitization parameters calculates "global"
029cd327 2734 // time bin index for timebin <localTB> in plane <plane>
5443e65e 2735 //
2736
2737 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2738 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2739 Double_t dx = (Double_t) fPar->GetTimeBinSize();
2740
2741 Int_t tbAmp = fPar->GetTimeBefore();
2742 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 2743 if(kTRUE) maxAmp = 0; // intentional until we change parameter class
5443e65e 2744 Int_t tbDrift = fPar->GetTimeMax();
2745 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
2746
029cd327 2747 Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
5443e65e 2748
029cd327 2749 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
5443e65e 2750
029cd327 2751 if((localTB < 0) &&
2752 (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
2753 if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
5443e65e 2754
2755 return gtb;
2756
2757
2758}
2759
2760//______________________________________________________
2761
2762void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2763{
2764 //
2765 // For all sensitive time bins sets corresponding layer index
2766 // in the array fTimeBins
2767 //
2768
2769 Int_t index;
2770
2771 for(Int_t i = 0; i < fN; i++) {
2772 index = fLayers[i]->GetTimeBinIndex();
2773
2774 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2775
2776 if(index < 0) continue;
029cd327 2777 if(index >= (Int_t) kMaxTimeBinIndex) {
5443e65e 2778 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2779 printf(" index %d exceeds allowed maximum of %d!\n",
029cd327 2780 index, kMaxTimeBinIndex-1);
5443e65e 2781 continue;
2782 }
2783 fTimeBinIndex[index] = i;
2784 }
2785
2786 Double_t x1, dx1, x2, dx2, gap;
2787
2788 for(Int_t i = 0; i < fN-1; i++) {
2789 x1 = fLayers[i]->GetX();
2790 dx1 = fLayers[i]->GetdX();
2791 x2 = fLayers[i+1]->GetX();
2792 dx2 = fLayers[i+1]->GetdX();
2793 gap = (x2 - dx2/2) - (x1 + dx1/2);
2794 if(gap < -0.01) {
2795 printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
2796 printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
2797 }
2798 if(gap > 0.01) {
2799 printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
2800 printf(" (%f - %f) - (%f + %f) = %f\n",
a9814c09 2801 x2, dx2/2, x1, dx1, gap);
5443e65e 2802 }
2803 }
2804}
2805
2806
2807//______________________________________________________
2808
2809
2810Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2811{
2812 //
2813 // Returns the number of time bin which in radial position is closest to <x>
2814 //
2815
2816 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2817 if(x <= fLayers[0]->GetX()) return 0;
2818
2819 Int_t b=0, e=fN-1, m=(b+e)/2;
2820 for (; b<e; m=(b+e)/2) {
2821 if (x > fLayers[m]->GetX()) b=m+1;
2822 else e=m;
2823 }
2824 if(TMath::Abs(x - fLayers[m]->GetX()) >
2825 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2826 else return m;
2827
2828}
2829
2830//______________________________________________________
2831
2832Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2833{
2834 //
2835 // Returns number of the innermost SENSITIVE propagation layer
2836 //
2837
2838 return GetLayerNumber(0);
2839}
2840
2841//______________________________________________________
2842
2843Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2844{
2845 //
2846 // Returns number of the outermost SENSITIVE time bin
2847 //
2848
2849 return GetLayerNumber(GetNumberOfTimeBins() - 1);
46d29e70 2850}
2851
5443e65e 2852//______________________________________________________
2853
2854Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2855{
2856 //
2857 // Returns number of SENSITIVE time bins
2858 //
2859
2860 Int_t tb, layer;
029cd327 2861 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
5443e65e 2862 layer = GetLayerNumber(tb);
2863 if(layer>=0) break;
2864 }
2865 return tb+1;
2866}
2867
2868//______________________________________________________
2869
2870void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2871{
2872 //
2873 // Insert layer <pl> in fLayers array.
2874 // Layers are sorted according to X coordinate.
2875
029cd327 2876 if ( fN == ((Int_t) kMaxLayersPerSector)) {
5443e65e 2877 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2878 return;
2879 }
2880 if (fN==0) {fLayers[fN++] = pl; return;}
2881 Int_t i=Find(pl->GetX());
2882
2883 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2884 fLayers[i]=pl; fN++;
2885
2886}
2887
2888//______________________________________________________
2889
2890Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2891{
2892 //
2893 // Returns index of the propagation layer nearest to X
2894 //
2895
2896 if (x <= fLayers[0]->GetX()) return 0;
2897 if (x > fLayers[fN-1]->GetX()) return fN;
2898 Int_t b=0, e=fN-1, m=(b+e)/2;
2899 for (; b<e; m=(b+e)/2) {
2900 if (x > fLayers[m]->GetX()) b=m+1;
2901 else e=m;
2902 }
2903 return m;
2904}
2905
3c625a9b 2906//______________________________________________________
2907void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2908{
2909 //
2910 // set centers and the width of sectors
2911 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2912 fZc[icham] = center[icham];
2913 fZmax[icham] = w[icham];
2914 fZmaxSensitive[icham] = wsensitive[icham];
2915 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2916 }
2917}
5443e65e 2918//______________________________________________________
2919
3c625a9b 2920void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2921{
2922 //
2923 // set centers and the width of sectors
2924 fHole = kFALSE;
2925 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2926 fIsHole[icham] = holes[icham];
2927 if (holes[icham]) fHole = kTRUE;
2928 }
2929}
2930
2931
2932
5443e65e 2933void AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
029cd327 2934 Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
a9814c09 2935 Bool_t &lookForCluster) const
5443e65e 2936{
2937 //
029cd327 2938 // Returns radial step <dx>, density <rho>, rad. length <radLength>,
5443e65e 2939 // and sensitivity <lookForCluster> in point <y,z>
2940 //
2941
2942 dx = fdX;
2943 rho = fRho;
029cd327 2944 radLength = fX0;
5443e65e 2945 lookForCluster = kFALSE;
3c625a9b 2946 //
2947 // check dead regions in sensitive volume
5443e65e 2948 if(fTimeBinIndex >= 0) {
3c625a9b 2949 //
2950 Int_t zone=-1;
029cd327 2951 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3c625a9b 2952 if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
2953 zone = ch;
2954 lookForCluster = !(fIsHole[zone]);
2955 if(TMath::Abs(y) > fYmaxSensitive){
2956 lookForCluster = kFALSE;
2957 }
2958 if (fIsHole[zone]) {
2959 //if hole
2960 rho = 1.29e-3;
2961 radLength = 36.66;
2962 }
2963 }
5443e65e 2964 }
3c625a9b 2965 return;
5443e65e 2966 }
3c625a9b 2967 //
2968 //
5443e65e 2969 // check hole
3c625a9b 2970 if (fHole==kFALSE) return;
2971 //
2972 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2973 if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
2974 if (fIsHole[ch]) {
2975 //if hole
2976 rho = 1.29e-3;
2977 radLength = 36.66;
2978 }
2979 }
2980 }
5443e65e 2981 return;
2982}
2983
3c625a9b 2984Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
2985{
2986 //
2987 //
2988 if (fTimeBinIndex < 0) return -20; //unknown
2989 Int_t zone=-10; // dead zone
2990 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2991 if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
2992 zone = ch;
2993 }
2994 return zone;
2995}
2996
2997
5443e65e 2998//______________________________________________________
2999
3000void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
a9814c09 3001 UInt_t index) {
5443e65e 3002
3003// Insert cluster in cluster array.
3004// Clusters are sorted according to Y coordinate.
3005
3006 if(fTimeBinIndex < 0) {
3007 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
3008 return;
3009 }
3010
029cd327 3011 if (fN== (Int_t) kMaxClusterPerTimeBin) {
5443e65e 3012 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
3013 return;
3014 }
3015 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
3016 Int_t i=Find(c->GetY());
3017 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3018 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
3019 fIndex[i]=index; fClusters[i]=c; fN++;
3020}
3021
3022//______________________________________________________
3023
3024Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const {
3025
3026// Returns index of the cluster nearest in Y
3027
3028 if (y <= fClusters[0]->GetY()) return 0;
3029 if (y > fClusters[fN-1]->GetY()) return fN;
3030 Int_t b=0, e=fN-1, m=(b+e)/2;
3031 for (; b<e; m=(b+e)/2) {
3032 if (y > fClusters[m]->GetY()) b=m+1;
3033 else e=m;
3034 }
3035 return m;
3036}
3037
fd621f36 3038//---------------------------------------------------------
5443e65e 3039
fd621f36 3040Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
3041//
3042// Returns correction factor for tilted pads geometry
3043//
5443e65e 3044
fd621f36 3045 Double_t h01 = sin(TMath::Pi() / 180.0 * fPar->GetTiltingAngle());
3046 Int_t det = c->GetDetector();
3047 Int_t plane = fGeom->GetPlane(det);
b3a5a838 3048
3049 if((plane == 1) || (plane == 3) || (plane == 5)) h01=-h01;
b8dc2353 3050
3051 if(fNoTilt) h01 = 0;
fd621f36 3052
3053 return h01;
3054}
5443e65e 3055
c630aafd 3056
3057
3058
3059
3060