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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();
7ac6fa52 943 if (TMath::Abs(c2)>=0.9999999){
944 delete track;
945 continue;
946 }
3c625a9b 947
948 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
949 Double_t y=track->GetYat(xtof);
950 if (y > ymax) {
7ac6fa52 951 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
952 delete track;
953 return 1;
954 }
3c625a9b 955 } else if (y <-ymax) {
7ac6fa52 956 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
957 delete track;
958 return 1;
959 }
3c625a9b 960 }
961
962 if (track->PropagateTo(xtof)) {
963 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
964 if (track->GetNumberOfClusters()>foundMin) found++;
965 }
966 }else{
967 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
968 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
969 seed->UpdateTrackParams(track, AliESDtrack::kTRDStop);
970 found++;
971 }
1e9bb598 972 }
973
d9b8978b 974 delete track;
3c625a9b 975
1e9bb598 976 //End of propagation to the TOF
3c625a9b 977 //if (foundClr>foundMin)
978 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
979
c630aafd 980
981 }
982
983 cerr<<"Number of seeds: "<<fNseeds<<endl;
984 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
985
1e9bb598 986 fSeeds->Clear(); fNseeds=0;
987
988 return 0;
989
990}
991
992//_____________________________________________________________________________
993Int_t AliTRDtracker::RefitInward(AliESD* event)
994{
995 //
996 // Refits tracks within the TRD. The ESD event is expected to contain seeds
997 // at the outer part of the TRD.
998 // The tracks are propagated to the innermost time bin
999 // of the TRD and the ESD event is updated
1000 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1001 //
1002
1003 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
1004 Float_t foundMin = fgkMinClustersInTrack * timeBins;
1005 Int_t nseed = 0;
1006 Int_t found = 0;
1007 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
1008
1009 Int_t n = event->GetNumberOfTracks();
1010 for (Int_t i=0; i<n; i++) {
1011 AliESDtrack* seed=event->GetTrack(i);
1012 ULong_t status=seed->GetStatus();
1013 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
46e2d86c 1014 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
1e9bb598 1015 nseed++;
1016
1017 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
3c625a9b 1018 seed2->ResetCovariance(5.);
1e9bb598 1019 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
46e2d86c 1020 UInt_t * indexes2 = seed2->GetIndexes();
1021 UInt_t * indexes3 = pt->GetBackupIndexes();
1022 for (Int_t i=0;i<200;i++) {
1023 if (indexes2[i]==0) break;
1024 indexes3[i] = indexes2[i];
1025 }
1026 //AliTRDtrack *pt = seed2;
1e9bb598 1027 AliTRDtrack &t=*pt;
1028 FollowProlongation(t, innerTB);
46e2d86c 1029
1030 if (t.GetNumberOfClusters()<seed->GetTRDclusters(indexes3)*0.5){
1031 // debug - why we dont go back?
1032 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1033 UInt_t * indexes2 = seed2->GetIndexes();
1034 UInt_t * indexes3 = pt2->GetBackupIndexes();
1035 for (Int_t i=0;i<200;i++) {
1036 if (indexes2[i]==0) break;
1037 indexes3[i] = indexes2[i];
1038 }
3c625a9b 1039 FollowProlongation(*pt2, innerTB);
1040 delete pt2;
46e2d86c 1041 }
1042
1e9bb598 1043 if (t.GetNumberOfClusters() >= foundMin) {
46e2d86c 1044 // UseClusters(&t);
1045 //CookLabel(pt, 1-fgkLabelFraction);
1e9bb598 1046 // t.CookdEdx();
1047 }
1048 found++;
1049// cout<<found<<'\r';
1050
1051 if(PropagateToTPC(t)) {
0fa7dfa7 1052 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
1e9bb598 1053 }
1054 delete seed2;
1055 delete pt;
1056 }
1057
1058 cout<<"Number of loaded seeds: "<<nseed<<endl;
1059 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
1060
c630aafd 1061 return 0;
1062
1063}
1064
bbf92647 1065
5443e65e 1066//---------------------------------------------------------------------------
1067Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
1068{
1069 // Starting from current position on track=t this function tries
1070 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1071 // if a close cluster is found. Returns the number of clusters
1072 // expected to be found in sensitive layers
bbf92647 1073
5443e65e 1074 Float_t wIndex, wTB, wChi2;
1075 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1076 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1077 Float_t wPx, wPy, wPz, wC;
029cd327 1078 Double_t px, py, pz;
5443e65e 1079 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
3c625a9b 1080 Int_t lastplane = GetLastPlane(&t);
46d29e70 1081
5443e65e 1082 Int_t trackIndex = t.GetLabel();
46d29e70 1083
5443e65e 1084 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
46d29e70 1085
029cd327 1086 Int_t tryAgain=fMaxGap;
46d29e70 1087
5443e65e 1088 Double_t alpha=t.GetAlpha();
c630aafd 1089 alpha = TVector2::Phi_0_2pi(alpha);
46d29e70 1090
5443e65e 1091 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
029cd327 1092 Double_t radLength, rho, x, dx, y, ymax, z;
46d29e70 1093
5443e65e 1094 Int_t expectedNumberOfClusters = 0;
1095 Bool_t lookForCluster;
46d29e70 1096
5443e65e 1097 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1098
5443e65e 1099
1100 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1101
1102 y = t.GetY(); z = t.GetZ();
1103
1104 // first propagate to the inner surface of the current time bin
029cd327 1105 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1106 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1107 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1108 y = t.GetY();
1109 ymax = x*TMath::Tan(0.5*alpha);
1110 if (y > ymax) {
1111 s = (s+1) % ns;
1112 if (!t.Rotate(alpha)) break;
029cd327 1113 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1114 } else if (y <-ymax) {
1115 s = (s-1+ns) % ns;
1116 if (!t.Rotate(-alpha)) break;
029cd327 1117 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1118 }
46d29e70 1119
5443e65e 1120 y = t.GetY(); z = t.GetZ();
1121
1122 // now propagate to the middle plane of the next time bin
029cd327 1123 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1124 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1125 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1126 y = t.GetY();
1127 ymax = x*TMath::Tan(0.5*alpha);
1128 if (y > ymax) {
1129 s = (s+1) % ns;
1130 if (!t.Rotate(alpha)) break;
029cd327 1131 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1132 } else if (y <-ymax) {
1133 s = (s-1+ns) % ns;
1134 if (!t.Rotate(-alpha)) break;
029cd327 1135 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1136 }
46d29e70 1137
46d29e70 1138
5443e65e 1139 if(lookForCluster) {
a819a5f7 1140
5443e65e 1141 expectedNumberOfClusters++;
5443e65e 1142 wIndex = (Float_t) t.GetLabel();
1143 wTB = nr;
46d29e70 1144
029cd327 1145 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
46d29e70 1146
5443e65e 1147 Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
5443e65e 1148 Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
46d29e70 1149
5443e65e 1150 Double_t road;
1151 if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
1152 else return expectedNumberOfClusters;
1153
1154 wYrt = (Float_t) y;
1155 wZrt = (Float_t) z;
1156 wYwindow = (Float_t) road;
029cd327 1157 t.GetPxPyPz(px,py,pz);
1158 wPx = (Float_t) px;
1159 wPy = (Float_t) py;
1160 wPz = (Float_t) pz;
5443e65e 1161 wC = (Float_t) t.GetC();
1162 wSigmaC2 = (Float_t) t.GetSigmaC2();
1163 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1164 wSigmaY2 = (Float_t) t.GetSigmaY2();
1165 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1166 wChi2 = -1;
1167
5443e65e 1168
1169 AliTRDcluster *cl=0;
1170 UInt_t index=0;
1171
029cd327 1172 Double_t maxChi2=fgkMaxChi2;
5443e65e 1173
1174 wYclosest = 12345678;
1175 wYcorrect = 12345678;
1176 wZclosest = 12345678;
1177 wZcorrect = 12345678;
1178 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1179
1180 // Find the closest correct cluster for debugging purposes
029cd327 1181 if (timeBin) {
a9814c09 1182 Float_t minDY = 1000000;
029cd327 1183 for (Int_t i=0; i<timeBin; i++) {
1184 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1185 if((c->GetLabel(0) != trackIndex) &&
1186 (c->GetLabel(1) != trackIndex) &&
1187 (c->GetLabel(2) != trackIndex)) continue;
1188 if(TMath::Abs(c->GetY() - y) > minDY) continue;
1189 minDY = TMath::Abs(c->GetY() - y);
1190 wYcorrect = c->GetY();
1191 wZcorrect = c->GetZ();
1192
1193 Double_t h01 = GetTiltFactor(c);
1194 wChi2 = t.GetPredictedChi2(c, h01);
1195 }
5443e65e 1196 }
46d29e70 1197
5443e65e 1198 // Now go for the real cluster search
a819a5f7 1199
029cd327 1200 if (timeBin) {
46e2d86c 1201 //
1202 //find cluster in history
1203 cl =0;
1204
1205 AliTRDcluster * cl0 = timeBin[0];
1206 if (!cl0) {
1207 continue;
1208 }
1209 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
3c625a9b 1210 if (plane>lastplane) continue;
46e2d86c 1211 Int_t timebin = cl0->GetLocalTimeBin();
1212 AliTRDcluster * cl2= GetCluster(&t,plane, timebin);
3c625a9b 1213 if (cl2) {
1214 cl =cl2;
1215 Double_t h01 = GetTiltFactor(cl);
1216 maxChi2=t.GetPredictedChi2(cl,h01);
1217 }
46e2d86c 1218 if ((!cl) && road>fgkWideRoad) {
1219 //if (t.GetNumberOfClusters()>4)
1220 // cerr<<t.GetNumberOfClusters()
1221 // <<"FindProlongation warning: Too broad road !\n";
1222 continue;
1223 }
1224
1225
1226 if(!cl){
1227
1228 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1229 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1230 if (c->GetY() > y+road) break;
1231 if (c->IsUsed() > 0) continue;
1232 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1233
1234 Double_t h01 = GetTiltFactor(c);
1235 Double_t chi2=t.GetPredictedChi2(c,h01);
1236
1237 if (chi2 > maxChi2) continue;
1238 maxChi2=chi2;
1239 cl=c;
1240 index=timeBin.GetIndex(i);
1241 }
1242 }
a9814c09 1243
1244 if(!cl) {
1245
029cd327 1246 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1247 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1248
1249 if (c->GetY() > y+road) break;
1250 if (c->IsUsed() > 0) continue;
1251 if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
1252
1253 Double_t h01 = GetTiltFactor(c);
1254 Double_t chi2=t.GetPredictedChi2(c, h01);
1255
029cd327 1256 if (chi2 > maxChi2) continue;
1257 maxChi2=chi2;
a9814c09 1258 cl=c;
029cd327 1259 index=timeBin.GetIndex(i);
a9814c09 1260 }
1261 }
a9814c09 1262 if (cl) {
1263 wYclosest = cl->GetY();
1264 wZclosest = cl->GetZ();
1265 Double_t h01 = GetTiltFactor(cl);
1266
1267 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
46e2d86c 1268 //printf("Track position\t%f\t%f\t%f\n",t.GetX(),t.GetY(),t.GetZ());
1269 //printf("Cluster position\t%d\t%f\t%f\n",cl->GetLocalTimeBin(),cl->GetY(),cl->GetZ());
3c625a9b 1270 Int_t det = cl->GetDetector();
1271 Int_t plane = fGeom->GetPlane(det);
46e2d86c 1272
3c625a9b 1273 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1274 //if(!t.Update(cl,maxChi2,index,h01)) {
1275 //if(!tryAgain--) return 0;
a9814c09 1276 }
029cd327 1277 else tryAgain=fMaxGap;
a9814c09 1278 }
1279 else {
3c625a9b 1280 //if (tryAgain==0) break;
029cd327 1281 tryAgain--;
a9814c09 1282 }
1283
1284 /*
1285 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1286
1287 printf(" %f", wIndex); //1
1288 printf(" %f", wTB); //2
1289 printf(" %f", wYrt); //3
1290 printf(" %f", wYclosest); //4
1291 printf(" %f", wYcorrect); //5
1292 printf(" %f", wYwindow); //6
1293 printf(" %f", wZrt); //7
1294 printf(" %f", wZclosest); //8
1295 printf(" %f", wZcorrect); //9
1296 printf(" %f", wZwindow); //10
1297 printf(" %f", wPx); //11
1298 printf(" %f", wPy); //12
1299 printf(" %f", wPz); //13
1300 printf(" %f", wSigmaC2*1000000); //14
1301 printf(" %f", wSigmaTgl2*1000); //15
1302 printf(" %f", wSigmaY2); //16
1303 // printf(" %f", wSigmaZ2); //17
1304 printf(" %f", wChi2); //17
1305 printf(" %f", wC); //18
1306 printf("\n");
1307 }
1308 */
5443e65e 1309 }
1310 }
1311 }
1312 return expectedNumberOfClusters;
1313
1314
1315}
a819a5f7 1316
5443e65e 1317//___________________________________________________________________
46d29e70 1318
5443e65e 1319Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
1320{
1321 // Starting from current radial position of track <t> this function
1322 // extrapolates the track up to outer timebin and in the sensitive
1323 // layers confirms prolongation if a close cluster is found.
1324 // Returns the number of clusters expected to be found in sensitive layers
46d29e70 1325
5443e65e 1326 Float_t wIndex, wTB, wChi2;
1327 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1328 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1329 Float_t wPx, wPy, wPz, wC;
029cd327 1330 Double_t px, py, pz;
5443e65e 1331 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
46d29e70 1332
5443e65e 1333 Int_t trackIndex = t.GetLabel();
029cd327 1334 Int_t tryAgain=fMaxGap;
46d29e70 1335
5443e65e 1336 Double_t alpha=t.GetAlpha();
9c9d2487 1337 TVector2::Phi_0_2pi(alpha);
46d29e70 1338
9c9d2487 1339 Int_t s;
46d29e70 1340
5443e65e 1341 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
029cd327 1342 Double_t radLength, rho, x, dx, y, ymax = 0, z;
5443e65e 1343 Bool_t lookForCluster;
a819a5f7 1344
5443e65e 1345 Int_t expectedNumberOfClusters = 0;
1346 x = t.GetX();
46d29e70 1347
5443e65e 1348 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1349
029cd327 1350 Int_t nRefPlane = fgkFirstPlane;
9c9d2487 1351 Bool_t isNewLayer = kFALSE;
46d29e70 1352
9c9d2487 1353 Double_t chi2;
1354 Double_t minDY;
3c625a9b 1355 Int_t zone =-10;
1356 Int_t nr;
1357 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
9c9d2487 1358
1359 y = t.GetY();
1360 z = t.GetZ();
46d29e70 1361
5443e65e 1362 // first propagate to the outer surface of the current time bin
46d29e70 1363
9c9d2487 1364 s = t.GetSector();
029cd327 1365 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1366 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2;
1367 y = t.GetY();
1368 z = t.GetZ();
46d29e70 1369
029cd327 1370 if(!t.PropagateTo(x,radLength,rho)) break;
3c625a9b 1371 // if (!AdjustSector(&t)) break;
1372 //
1373 // MI -fix untill correct material desription will be implemented
1374 //
1375 Float_t angle = t.GetAlpha(); // MI - if rotation - we go through the material -
9c9d2487 1376 if (!AdjustSector(&t)) break;
3c625a9b 1377 if (TMath::Abs(angle - t.GetAlpha())>0.000001) break; //better to stop track
1378 Int_t currentzone = fTrSec[s]->GetLayer(nr)->GetZone(z);
1379 if (currentzone==-10) break; // we are in the frame
1380 if (currentzone>-10){ // layer knows where we are
1381 if (zone==-10) zone = currentzone;
1382 if (zone!=currentzone) break;
1383 }
1384 //
1385 //
9c9d2487 1386 s = t.GetSector();
029cd327 1387 if (!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1388
5443e65e 1389 y = t.GetY();
9c9d2487 1390 z = t.GetZ();
a819a5f7 1391
9c9d2487 1392 // Barrel Tracks [SR, 04.04.2003]
46d29e70 1393
9c9d2487 1394 s = t.GetSector();
1395 if (fTrSec[s]->GetLayer(nr)->IsSensitive() !=
1396 fTrSec[s]->GetLayer(nr+1)->IsSensitive() ) {
46d29e70 1397
c630aafd 1398// if (IsStoringBarrel()) StoreBarrelTrack(&t, nRefPlane++, kTrackBack);
9c9d2487 1399 }
46d29e70 1400
9c9d2487 1401 if (fTrSec[s]->GetLayer(nr-1)->IsSensitive() &&
1402 ! fTrSec[s]->GetLayer(nr)->IsSensitive()) {
1403 isNewLayer = kTRUE;
1404 } else {isNewLayer = kFALSE;}
46d29e70 1405
5443e65e 1406 y = t.GetY();
9c9d2487 1407 z = t.GetZ();
a819a5f7 1408
9c9d2487 1409 // now propagate to the middle plane of the next time bin
029cd327 1410 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1411
9c9d2487 1412 x = fTrSec[s]->GetLayer(nr+1)->GetX();
029cd327 1413 if(!t.PropagateTo(x,radLength,rho)) break;
9c9d2487 1414 if (!AdjustSector(&t)) break;
1415 s = t.GetSector();
029cd327 1416 if(!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1417
9c9d2487 1418 y = t.GetY();
1419 z = t.GetZ();
1420
1421 if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
5443e65e 1422 // printf("label %d, pl %d, lookForCluster %d \n",
a9814c09 1423 // trackIndex, nr+1, lookForCluster);
5443e65e 1424
1425 if(lookForCluster) {
1426 expectedNumberOfClusters++;
1427
1428 wIndex = (Float_t) t.GetLabel();
1429 wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
1430
029cd327 1431 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
5443e65e 1432 Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
1433 Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
1434 if((t.GetSigmaY2() + sy2) < 0) break;
1435 Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
1436 Double_t y=t.GetY(), z=t.GetZ();
1437
1438 wYrt = (Float_t) y;
1439 wZrt = (Float_t) z;
1440 wYwindow = (Float_t) road;
029cd327 1441 t.GetPxPyPz(px,py,pz);
1442 wPx = (Float_t) px;
1443 wPy = (Float_t) py;
1444 wPz = (Float_t) pz;
5443e65e 1445 wC = (Float_t) t.GetC();
1446 wSigmaC2 = (Float_t) t.GetSigmaC2();
1447 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1448 wSigmaY2 = (Float_t) t.GetSigmaY2();
1449 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1450 wChi2 = -1;
1451
029cd327 1452 if (road>fgkWideRoad) {
a9814c09 1453 if (t.GetNumberOfClusters()>4)
1454 cerr<<t.GetNumberOfClusters()
1455 <<"FindProlongation warning: Too broad road !\n";
1456 return 0;
5443e65e 1457 }
1458
1459 AliTRDcluster *cl=0;
1460 UInt_t index=0;
1461
029cd327 1462 Double_t maxChi2=fgkMaxChi2;
5443e65e 1463
9c9d2487 1464 if (isNewLayer) {
1465 road = 3 * road;
1466 //sz2 = 3 * sz2;
029cd327 1467 maxChi2 = 10 * fgkMaxChi2;
9c9d2487 1468 }
1469
029cd327 1470 if (nRefPlane == fgkFirstPlane) maxChi2 = 20 * fgkMaxChi2;
1471 if (nRefPlane == fgkFirstPlane+2) maxChi2 = 15 * fgkMaxChi2;
1472 if (t.GetNRotate() > 0) maxChi2 = 3 * maxChi2;
9c9d2487 1473
1474
5443e65e 1475 wYclosest = 12345678;
1476 wYcorrect = 12345678;
1477 wZclosest = 12345678;
1478 wZcorrect = 12345678;
1479 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1480
1481 // Find the closest correct cluster for debugging purposes
029cd327 1482 if (timeBin) {
9c9d2487 1483 minDY = 1000000;
029cd327 1484 for (Int_t i=0; i<timeBin; i++) {
1485 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1486 if((c->GetLabel(0) != trackIndex) &&
1487 (c->GetLabel(1) != trackIndex) &&
1488 (c->GetLabel(2) != trackIndex)) continue;
1489 if(TMath::Abs(c->GetY() - y) > minDY) continue;
9c9d2487 1490 //minDY = TMath::Abs(c->GetY() - y);
1491 minDY = c->GetY() - y;
a9814c09 1492 wYcorrect = c->GetY();
1493 wZcorrect = c->GetZ();
1494
1495 Double_t h01 = GetTiltFactor(c);
1496 wChi2 = t.GetPredictedChi2(c, h01);
1497 }
5443e65e 1498 }
46d29e70 1499
5443e65e 1500 // Now go for the real cluster search
46d29e70 1501
029cd327 1502 if (timeBin) {
5443e65e 1503
029cd327 1504 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1505 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1506 if (c->GetY() > y+road) break;
9c9d2487 1507 if (c->IsUsed() > 0) continue;
a9814c09 1508 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1509
1510 Double_t h01 = GetTiltFactor(c);
9c9d2487 1511 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1512
029cd327 1513 if (chi2 > maxChi2) continue;
1514 maxChi2=chi2;
a9814c09 1515 cl=c;
029cd327 1516 index=timeBin.GetIndex(i);
9c9d2487 1517
1518 //check is correct
1519 if((c->GetLabel(0) != trackIndex) &&
1520 (c->GetLabel(1) != trackIndex) &&
1521 (c->GetLabel(2) != trackIndex)) t.AddNWrong();
a9814c09 1522 }
5443e65e 1523
a9814c09 1524 if(!cl) {
1525
029cd327 1526 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1527 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1528
1529 if (c->GetY() > y+road) break;
9c9d2487 1530 if (c->IsUsed() > 0) continue;
a9814c09 1531 if((c->GetZ()-z)*(c->GetZ()-z) > 2.25 * 12 * sz2) continue;
1532
1533 Double_t h01 = GetTiltFactor(c);
9c9d2487 1534 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1535
029cd327 1536 if (chi2 > maxChi2) continue;
1537 maxChi2=chi2;
a9814c09 1538 cl=c;
029cd327 1539 index=timeBin.GetIndex(i);
a9814c09 1540 }
1541 }
1542
1543 if (cl) {
1544 wYclosest = cl->GetY();
1545 wZclosest = cl->GetZ();
1546
1547 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1548 Double_t h01 = GetTiltFactor(cl);
3c625a9b 1549 Int_t det = cl->GetDetector();
1550 Int_t plane = fGeom->GetPlane(det);
1551
1552 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1553 //if(!t.Update(cl,maxChi2,index,h01)) {
029cd327 1554 if(!tryAgain--) return 0;
a9814c09 1555 }
029cd327 1556 else tryAgain=fMaxGap;
a9814c09 1557 }
1558 else {
029cd327 1559 if (tryAgain==0) break;
1560 tryAgain--;
9c9d2487 1561
1562 //if (minDY < 1000000 && isNewLayer)
1563 //cout << "\t" << nRefPlane << "\t" << "\t" << t.GetNRotate() << "\t" <<
029cd327 1564 // road << "\t" << minDY << "\t" << chi2 << "\t" << wChi2 << "\t" << maxChi2 << endl;
9c9d2487 1565
a9814c09 1566 }
1567
9c9d2487 1568 isNewLayer = kFALSE;
1569
a9814c09 1570 /*
1571 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1572
1573 printf(" %f", wIndex); //1
1574 printf(" %f", wTB); //2
1575 printf(" %f", wYrt); //3
1576 printf(" %f", wYclosest); //4
1577 printf(" %f", wYcorrect); //5
1578 printf(" %f", wYwindow); //6
1579 printf(" %f", wZrt); //7
1580 printf(" %f", wZclosest); //8
1581 printf(" %f", wZcorrect); //9
1582 printf(" %f", wZwindow); //10
1583 printf(" %f", wPx); //11
1584 printf(" %f", wPy); //12
1585 printf(" %f", wPz); //13
1586 printf(" %f", wSigmaC2*1000000); //14
1587 printf(" %f", wSigmaTgl2*1000); //15
1588 printf(" %f", wSigmaY2); //16
1589 // printf(" %f", wSigmaZ2); //17
1590 printf(" %f", wChi2); //17
1591 printf(" %f", wC); //18
1592 printf("\n");
1593 }
1594 */
5443e65e 1595 }
1596 }
1597 }
3c625a9b 1598 if (nr<outerTB)
1599 t.SetStop(kTRUE);
1600 else
1601 t.SetStop(kFALSE);
5443e65e 1602 return expectedNumberOfClusters;
9c9d2487 1603
1604
5443e65e 1605}
1606
1e9bb598 1607//---------------------------------------------------------------------------
1608Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
1609{
1610 // Starting from current position on track=t this function tries
1611 // to extrapolate the track up to timeBin=0 and to reuse already
1612 // assigned clusters. Returns the number of clusters
1613 // expected to be found in sensitive layers
1614 // get indices of assigned clusters for each layer
1615 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1616
1617 Int_t iCluster[90];
1618 for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
1619 for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
1620 Int_t index = t.GetClusterIndex(i);
1621 AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
1622 if (!cl) continue;
1623 Int_t detector=cl->GetDetector();
1624 Int_t localTimeBin=cl->GetLocalTimeBin();
1625 Int_t sector=fGeom->GetSector(detector);
1626 Int_t plane=fGeom->GetPlane(detector);
1627
1628 Int_t trackingSector = CookSectorIndex(sector);
1629
1630 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1631 if(gtb < 0) continue;
1632 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1633 iCluster[layer] = index;
1634 }
1635 t.ResetClusters();
1636
1637 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1638
1639 Double_t alpha=t.GetAlpha();
1640 alpha = TVector2::Phi_0_2pi(alpha);
1641
1642 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1643 Double_t radLength, rho, x, dx, y, ymax, z;
1644
1645 Int_t expectedNumberOfClusters = 0;
1646 Bool_t lookForCluster;
1647
1648 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1649
1650
1651 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1652
1653 y = t.GetY(); z = t.GetZ();
1654
1655 // first propagate to the inner surface of the current time bin
1656 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1657 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1658 if(!t.PropagateTo(x,radLength,rho)) break;
1659 y = t.GetY();
1660 ymax = x*TMath::Tan(0.5*alpha);
1661 if (y > ymax) {
1662 s = (s+1) % ns;
1663 if (!t.Rotate(alpha)) break;
1664 if(!t.PropagateTo(x,radLength,rho)) break;
1665 } else if (y <-ymax) {
1666 s = (s-1+ns) % ns;
1667 if (!t.Rotate(-alpha)) break;
1668 if(!t.PropagateTo(x,radLength,rho)) break;
1669 }
1670
1671 y = t.GetY(); z = t.GetZ();
1672
1673 // now propagate to the middle plane of the next time bin
1674 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1675 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1676 if(!t.PropagateTo(x,radLength,rho)) break;
1677 y = t.GetY();
1678 ymax = x*TMath::Tan(0.5*alpha);
1679 if (y > ymax) {
1680 s = (s+1) % ns;
1681 if (!t.Rotate(alpha)) break;
1682 if(!t.PropagateTo(x,radLength,rho)) break;
1683 } else if (y <-ymax) {
1684 s = (s-1+ns) % ns;
1685 if (!t.Rotate(-alpha)) break;
1686 if(!t.PropagateTo(x,radLength,rho)) break;
1687 }
1688
1689 if(lookForCluster) expectedNumberOfClusters++;
1690
1691 // use assigned cluster
1692 if (!iCluster[nr-1]) continue;
1693 AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
1694 Double_t h01 = GetTiltFactor(cl);
1695 Double_t chi2=t.GetPredictedChi2(cl, h01);
1696 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1697 t.Update(cl,chi2,iCluster[nr-1],h01);
1698 }
1699
1700 return expectedNumberOfClusters;
1701}
1702
5443e65e 1703//___________________________________________________________________
1704
1705Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
1706{
1707 // Starting from current radial position of track <t> this function
1708 // extrapolates the track up to radial position <xToGo>.
1709 // Returns 1 if track reaches the plane, and 0 otherwise
1710
1711 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1712
1713 Double_t alpha=t.GetAlpha();
1714
1715 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1716 if (alpha < 0. ) alpha += 2.*TMath::Pi();
1717
1718 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1719
1720 Bool_t lookForCluster;
029cd327 1721 Double_t radLength, rho, x, dx, y, ymax, z;
5443e65e 1722
1723 x = t.GetX();
1724
1725 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1726
1727 Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
1728
1729 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
1730
1731 y = t.GetY(); z = t.GetZ();
1732
1733 // first propagate to the outer surface of the current time bin
029cd327 1734 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1735 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1736 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1737 y = t.GetY();
1738 ymax = x*TMath::Tan(0.5*alpha);
1739 if (y > ymax) {
1740 s = (s+1) % ns;
1741 if (!t.Rotate(alpha)) return 0;
1742 } else if (y <-ymax) {
1743 s = (s-1+ns) % ns;
1744 if (!t.Rotate(-alpha)) return 0;
1745 }
029cd327 1746 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1747
1748 y = t.GetY(); z = t.GetZ();
1749
1750 // now propagate to the middle plane of the next time bin
029cd327 1751 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1752 x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1753 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1754 y = t.GetY();
1755 ymax = x*TMath::Tan(0.5*alpha);
1756 if (y > ymax) {
1757 s = (s+1) % ns;
1758 if (!t.Rotate(alpha)) return 0;
1759 } else if (y <-ymax) {
1760 s = (s-1+ns) % ns;
1761 if (!t.Rotate(-alpha)) return 0;
1762 }
029cd327 1763 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1764 }
1765 return 1;
1766}
1767
1768//___________________________________________________________________
1769
1770Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
1771{
1772 // Starting from current radial position of track <t> this function
1773 // extrapolates the track up to radial position of the outermost
1774 // padrow of the TPC.
1775 // Returns 1 if track reaches the TPC, and 0 otherwise
1776
c630aafd 1777 //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
5443e65e 1778
1779 Double_t alpha=t.GetAlpha();
c630aafd 1780 alpha = TVector2::Phi_0_2pi(alpha);
5443e65e 1781
1782 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1783
1784 Bool_t lookForCluster;
029cd327 1785 Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
5443e65e 1786
1787 x = t.GetX();
1788
1789 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
5443e65e 1790 Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
1791
1792 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
1793
9c9d2487 1794 y = t.GetY();
1795 z = t.GetZ();
5443e65e 1796
1797 // first propagate to the outer surface of the current time bin
029cd327 1798 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1799 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
1800
029cd327 1801 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1802 AdjustSector(&t);
029cd327 1803 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1804
9c9d2487 1805 y = t.GetY();
1806 z = t.GetZ();
5443e65e 1807
1808 // now propagate to the middle plane of the next time bin
029cd327 1809 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1810 x = fTrSec[s]->GetLayer(nr-1)->GetX();
1811
029cd327 1812 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1813 AdjustSector(&t);
029cd327 1814 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1815 }
1816 return 1;
1817}
1818
5443e65e 1819void AliTRDtracker::LoadEvent()
1820{
1821 // Fills clusters into TRD tracking_sectors
1822 // Note that the numbering scheme for the TRD tracking_sectors
1823 // differs from that of TRD sectors
1824
1825 ReadClusters(fClusters);
1826 Int_t ncl=fClusters->GetEntriesFast();
1827 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1828
1829 UInt_t index;
1830 while (ncl--) {
e24ea474 1831// printf("\r %d left ",ncl);
5443e65e 1832 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1833 Int_t detector=c->GetDetector();
1834 Int_t localTimeBin=c->GetLocalTimeBin();
5443e65e 1835 Int_t sector=fGeom->GetSector(detector);
1836 Int_t plane=fGeom->GetPlane(detector);
1837
029cd327 1838 Int_t trackingSector = CookSectorIndex(sector);
5443e65e 1839
029cd327 1840 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
b3a5a838 1841 if(gtb < 0) continue;
029cd327 1842 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
5443e65e 1843
1844 index=ncl;
029cd327 1845 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
5443e65e 1846 }
1847 printf("\r\n");
1848
1849}
1850
c630aafd 1851//_____________________________________________________________________________
1852Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1853{
1854 // Fills clusters into TRD tracking_sectors
1855 // Note that the numbering scheme for the TRD tracking_sectors
1856 // differs from that of TRD sectors
1857
1858 if (ReadClusters(fClusters,cTree)) {
1859 Error("LoadClusters","Problem with reading the clusters !");
1860 return 1;
1861 }
1862 Int_t ncl=fClusters->GetEntriesFast();
1863 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1864
1865 UInt_t index;
3c625a9b 1866 for (Int_t ichamber=0;ichamber<5;ichamber++)
1867 for (Int_t isector=0;isector<18;isector++){
1868 fHoles[ichamber][isector]=kTRUE;
1869 }
1870
1871
c630aafd 1872 while (ncl--) {
1873// printf("\r %d left ",ncl);
1874 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1875 Int_t detector=c->GetDetector();
1876 Int_t localTimeBin=c->GetLocalTimeBin();
c630aafd 1877 Int_t sector=fGeom->GetSector(detector);
1878 Int_t plane=fGeom->GetPlane(detector);
3c625a9b 1879
029cd327 1880 Int_t trackingSector = CookSectorIndex(sector);
3c625a9b 1881 if (c->GetLabel(0)>0){
1882 Int_t chamber = fGeom->GetChamber(detector);
1883 fHoles[chamber][trackingSector]=kFALSE;
1884 }
c630aafd 1885
029cd327 1886 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
c630aafd 1887 if(gtb < 0) continue;
029cd327 1888 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
c630aafd 1889
1890 index=ncl;
029cd327 1891 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
c630aafd 1892 }
1893 printf("\r\n");
3c625a9b 1894 //
1895 //
1896 /*
1897 for (Int_t isector=0;isector<18;isector++){
1898 for (Int_t ichamber=0;ichamber<5;ichamber++)
1899 if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
1900 printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
1901 fGeom->IsHole(0,ichamber,17-isector));
1902 }
1903 */
c630aafd 1904 return 0;
1905}
1906
5443e65e 1907//_____________________________________________________________________________
1908void AliTRDtracker::UnloadEvent()
1909{
1910 //
1911 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1912 //
1913
1914 Int_t i, nentr;
1915
1916 nentr = fClusters->GetEntriesFast();
1917 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1918
1919 nentr = fSeeds->GetEntriesFast();
1920 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1921
1922 nentr = fTracks->GetEntriesFast();
1923 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1924
1925 Int_t nsec = AliTRDgeometry::kNsect;
1926
1927 for (i = 0; i < nsec; i++) {
1928 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1929 fTrSec[i]->GetLayer(pl)->Clear();
1930 }
1931 }
1932
1933}
1934
1935//__________________________________________________________________________
1936void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
1937{
1938 // Creates track seeds using clusters in timeBins=i1,i2
1939
1940 if(turn > 2) {
1941 cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
1942 return;
1943 }
1944
1945 Double_t x[5], c[15];
029cd327 1946 Int_t maxSec=AliTRDgeometry::kNsect;
5443e65e 1947
1948 Double_t alpha=AliTRDgeometry::GetAlpha();
1949 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
1950 Double_t cs=cos(alpha), sn=sin(alpha);
1951 Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
1952
1953
1954 Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
1955 Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
1956
1957 Double_t x1 =fTrSec[0]->GetX(i1);
1958 Double_t xx2=fTrSec[0]->GetX(i2);
1959
029cd327 1960 for (Int_t ns=0; ns<maxSec; ns++) {
5443e65e 1961
029cd327 1962 Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1963 Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
5443e65e 1964 Int_t nm=(*fTrSec[ns]->GetLayer(i2));
029cd327 1965 Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1966 Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
5443e65e 1967
1968 AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
1969
1970 for (Int_t is=0; is < r1; is++) {
1971 Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
1972
1973 for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
a9814c09 1974
1975 const AliTRDcluster *cl;
1976 Double_t x2, y2, z2;
1977 Double_t x3=0., y3=0.;
1978
1979 if (js<nl2) {
1980 if(turn != 2) continue;
029cd327 1981 AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1982 cl=r2[js];
1983 y2=cl->GetY(); z2=cl->GetZ();
1984
1985 x2= xx2*cs2+y2*sn2;
1986 y2=-xx2*sn2+y2*cs2;
1987 }
1988 else if (js<nl2+nl) {
1989 if(turn != 1) continue;
029cd327 1990 AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1991 cl=r2[js-nl2];
1992 y2=cl->GetY(); z2=cl->GetZ();
1993
1994 x2= xx2*cs+y2*sn;
1995 y2=-xx2*sn+y2*cs;
1996 }
1997 else if (js<nl2+nl+nm) {
1998 if(turn != 1) continue;
1999 AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
2000 cl=r2[js-nl2-nl];
2001 x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
2002 }
2003 else if (js<nl2+nl+nm+nu) {
2004 if(turn != 1) continue;
029cd327 2005 AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
a9814c09 2006 cl=r2[js-nl2-nl-nm];
2007 y2=cl->GetY(); z2=cl->GetZ();
2008
2009 x2=xx2*cs-y2*sn;
2010 y2=xx2*sn+y2*cs;
2011 }
2012 else {
2013 if(turn != 2) continue;
029cd327 2014 AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
a9814c09 2015 cl=r2[js-nl2-nl-nm-nu];
2016 y2=cl->GetY(); z2=cl->GetZ();
2017
2018 x2=xx2*cs2-y2*sn2;
2019 y2=xx2*sn2+y2*cs2;
2020 }
2021
029cd327 2022 if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
a9814c09 2023
2024 Double_t zz=z1 - z1/x1*(x1-x2);
2025
029cd327 2026 if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
a9814c09 2027
2028 Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
2029 if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
2030
2031 x[0]=y1;
2032 x[1]=z1;
2033 x[4]=f1trd(x1,y1,x2,y2,x3,y3);
2034
029cd327 2035 if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
a9814c09 2036
2037 x[2]=f2trd(x1,y1,x2,y2,x3,y3);
2038
2039 if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
2040
2041 x[3]=f3trd(x1,y1,x2,y2,z1,z2);
2042
029cd327 2043 if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
a9814c09 2044
2045 Double_t a=asin(x[2]);
2046 Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
2047
029cd327 2048 if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
a9814c09 2049
2050 Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
2051 Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
029cd327 2052 Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
a9814c09 2053
2054 // Tilt changes
2055 Double_t h01 = GetTiltFactor(r1[is]);
029cd327 2056 Double_t xuFactor = 100.;
b8dc2353 2057 if(fNoTilt) {
2058 h01 = 0;
029cd327 2059 xuFactor = 1;
b8dc2353 2060 }
2061
fd621f36 2062 sy1=sy1+sz1*h01*h01;
b3a5a838 2063 Double_t syz=sz1*(-h01);
a9814c09 2064 // end of tilt changes
2065
b3a5a838 2066 Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
2067 Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
2068 Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
2069 Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
2070 Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
2071 Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
2072 Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
2073 Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
2074 Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
2075 Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
2076
a9814c09 2077
b3a5a838 2078 c[0]=sy1;
a9814c09 2079 // c[1]=0.; c[2]=sz1;
029cd327 2080 c[1]=syz; c[2]=sz1*xuFactor;
b3a5a838 2081 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
2082 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
2083 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
2084 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
2085 c[13]=f30*sy1*f40+f32*sy2*f42;
2086 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
a9814c09 2087
2088 UInt_t index=r1.GetIndex(is);
2089
2090 AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
2091
2092 Int_t rc=FollowProlongation(*track, i2);
2093
2094 if ((rc < 1) ||
2095 (track->GetNumberOfClusters() <
029cd327 2096 (outer-inner)*fgkMinClustersInSeed)) delete track;
a9814c09 2097 else {
2098 fSeeds->AddLast(track); fNseeds++;
e24ea474 2099// cerr<<"\r found seed "<<fNseeds;
a9814c09 2100 }
5443e65e 2101 }
2102 }
2103 }
2104}
2105
2106//_____________________________________________________________________________
c630aafd 2107Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree)
5443e65e 2108{
2109 //
a819a5f7 2110 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2111 // from the file. The names of the cluster tree and branches
2112 // should match the ones used in AliTRDclusterizer::WriteClusters()
2113 //
029cd327 2114 TObjArray *clusterArray = new TObjArray(400);
5443e65e 2115
c630aafd 2116 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2117 if (!branch) {
2118 Error("ReadClusters","Can't get the branch !");
2119 return 1;
2120 }
029cd327 2121 branch->SetAddress(&clusterArray);
5443e65e 2122
2123 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2124 printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
a819a5f7 2125
a819a5f7 2126 // Loop through all entries in the tree
2127 Int_t nbytes;
2128 AliTRDcluster *c = 0;
5443e65e 2129 printf("\n");
a819a5f7 2130
2131 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2132
2133 // Import the tree
5443e65e 2134 nbytes += ClusterTree->GetEvent(iEntry);
2135
a819a5f7 2136 // Get the number of points in the detector
029cd327 2137 Int_t nCluster = clusterArray->GetEntriesFast();
e24ea474 2138// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 2139
a819a5f7 2140 // Loop through all TRD digits
2141 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2142 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
a819a5f7 2143 AliTRDcluster *co = new AliTRDcluster(*c);
2144 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
5443e65e 2145 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 2146 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2147 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
a819a5f7 2148 array->AddLast(co);
029cd327 2149 delete clusterArray->RemoveAt(iCluster);
a819a5f7 2150 }
2151 }
2152
029cd327 2153 delete clusterArray;
5443e65e 2154
c630aafd 2155 return 0;
a819a5f7 2156}
2157
5443e65e 2158//______________________________________________________________________
2159void AliTRDtracker::ReadClusters(TObjArray *array, const Char_t *filename)
a819a5f7 2160{
2161 //
5443e65e 2162 // Reads AliTRDclusters from file <filename>. The names of the cluster
2163 // tree and branches should match the ones used in
2164 // AliTRDclusterizer::WriteClusters()
2165 // if <array> == 0, clusters are added into AliTRDtracker fCluster array
a819a5f7 2166 //
2167
5443e65e 2168 TDirectory *savedir=gDirectory;
46d29e70 2169
5443e65e 2170 TFile *file = TFile::Open(filename);
2171 if (!file->IsOpen()) {
2172 cerr<<"Can't open file with TRD clusters"<<endl;
2173 return;
2174 }
46d29e70 2175
5443e65e 2176 Char_t treeName[12];
e24ea474 2177 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
029cd327 2178 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
46d29e70 2179
029cd327 2180 if (!clusterTree) {
5443e65e 2181 cerr<<"AliTRDtracker::ReadClusters(): ";
2182 cerr<<"can't get a tree with clusters !\n";
2183 return;
2184 }
46d29e70 2185
029cd327 2186 TObjArray *clusterArray = new TObjArray(400);
46d29e70 2187
029cd327 2188 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
46d29e70 2189
029cd327 2190 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2191 cout<<"found "<<nEntries<<" in clusterTree"<<endl;
a819a5f7 2192
5443e65e 2193 // Loop through all entries in the tree
2194 Int_t nbytes;
2195 AliTRDcluster *c = 0;
bbf92647 2196
5443e65e 2197 printf("\n");
bbf92647 2198
5443e65e 2199 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
46d29e70 2200
5443e65e 2201 // Import the tree
029cd327 2202 nbytes += clusterTree->GetEvent(iEntry);
0a29d0f1 2203
5443e65e 2204 // Get the number of points in the detector
029cd327 2205 Int_t nCluster = clusterArray->GetEntriesFast();
b3a5a838 2206 printf("\n Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 2207
2208 // Loop through all TRD digits
2209 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2210 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
5443e65e 2211 AliTRDcluster *co = new AliTRDcluster(*c);
2212 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2213 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 2214 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2215 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
5443e65e 2216 array->AddLast(co);
029cd327 2217 delete clusterArray->RemoveAt(iCluster);
5443e65e 2218 }
46d29e70 2219 }
0a29d0f1 2220
5443e65e 2221 file->Close();
029cd327 2222 delete clusterArray;
5443e65e 2223 savedir->cd();
2224
2225}
2226
c630aafd 2227void AliTRDtracker::ReadClusters(TObjArray *array, const TFile *inp)
2228{
2229 //
2230 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2231 // from the file. The names of the cluster tree and branches
2232 // should match the ones used in AliTRDclusterizer::WriteClusters()
2233 //
2234
2235 TDirectory *savedir=gDirectory;
2236
2237 if (inp) {
2238 TFile *in=(TFile*)inp;
2239 if (!in->IsOpen()) {
2240 cerr<<"AliTRDtracker::ReadClusters(): input file is not open !\n";
2241 return;
2242 }
2243 else{
2244 in->cd();
2245 }
2246 }
2247
2248 Char_t treeName[12];
2249 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
029cd327 2250 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
c630aafd 2251
029cd327 2252 TObjArray *clusterArray = new TObjArray(400);
c630aafd 2253
029cd327 2254 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
c630aafd 2255
029cd327 2256 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2257 printf("found %d entries in %s.\n",nEntries,clusterTree->GetName());
c630aafd 2258
2259 // Loop through all entries in the tree
2260 Int_t nbytes;
2261 AliTRDcluster *c = 0;
2262 printf("\n");
2263
2264 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2265
2266 // Import the tree
029cd327 2267 nbytes += clusterTree->GetEvent(iEntry);
c630aafd 2268
2269 // Get the number of points in the detector
029cd327 2270 Int_t nCluster = clusterArray->GetEntriesFast();
c630aafd 2271// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2272
2273 // Loop through all TRD digits
2274 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2275 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
c630aafd 2276 AliTRDcluster *co = new AliTRDcluster(*c);
2277 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2278 Int_t ltb = co->GetLocalTimeBin();
2279 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2280 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
2281 array->AddLast(co);
029cd327 2282 delete clusterArray->RemoveAt(iCluster);
c630aafd 2283 }
2284 }
2285
029cd327 2286 delete clusterArray;
c630aafd 2287 savedir->cd();
2288
2289}
46d29e70 2290
2291//__________________________________________________________________
029cd327 2292void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2293{
2294 //
2295 // This cooks a label. Mmmmh, smells good...
2296 //
46d29e70 2297
2298 Int_t label=123456789, index, i, j;
5443e65e 2299 Int_t ncl=pt->GetNumberOfClusters();
029cd327 2300 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
5443e65e 2301
029cd327 2302 Bool_t labelAdded;
46d29e70 2303
029cd327 2304 // Int_t s[kRange][2];
2305 Int_t **s = new Int_t* [kRange];
2306 for (i=0; i<kRange; i++) {
d1b06c24 2307 s[i] = new Int_t[2];
2308 }
029cd327 2309 for (i=0; i<kRange; i++) {
46d29e70 2310 s[i][0]=-1;
2311 s[i][1]=0;
2312 }
2313
2314 Int_t t0,t1,t2;
2315 for (i=0; i<ncl; i++) {
5443e65e 2316 index=pt->GetClusterIndex(i);
46d29e70 2317 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
5443e65e 2318 t0=c->GetLabel(0);
2319 t1=c->GetLabel(1);
2320 t2=c->GetLabel(2);
46d29e70 2321 }
2322
2323 for (i=0; i<ncl; i++) {
5443e65e 2324 index=pt->GetClusterIndex(i);
46d29e70 2325 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2326 for (Int_t k=0; k<3; k++) {
5443e65e 2327 label=c->GetLabel(k);
029cd327 2328 labelAdded=kFALSE; j=0;
46d29e70 2329 if (label >= 0) {
029cd327 2330 while ( (!labelAdded) && ( j < kRange ) ) {
a9814c09 2331 if (s[j][0]==label || s[j][1]==0) {
2332 s[j][0]=label;
2333 s[j][1]=s[j][1]+1;
029cd327 2334 labelAdded=kTRUE;
a9814c09 2335 }
2336 j++;
2337 }
46d29e70 2338 }
2339 }
2340 }
2341
46d29e70 2342 Int_t max=0;
2343 label = -123456789;
2344
029cd327 2345 for (i=0; i<kRange; i++) {
46d29e70 2346 if (s[i][1]>max) {
2347 max=s[i][1]; label=s[i][0];
2348 }
2349 }
5443e65e 2350
029cd327 2351 for (i=0; i<kRange; i++) {
5443e65e 2352 delete []s[i];
2353 }
2354
d1b06c24 2355 delete []s;
5443e65e 2356
2357 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
2358
2359 pt->SetLabel(label);
2360
46d29e70 2361}
2362
c630aafd 2363
5443e65e 2364//__________________________________________________________________
029cd327 2365void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2366{
2367 //
2368 // Use clusters, but don't abuse them!
2369 //
2370
5443e65e 2371 Int_t ncl=t->GetNumberOfClusters();
2372 for (Int_t i=from; i<ncl; i++) {
2373 Int_t index = t->GetClusterIndex(i);
2374 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2375 c->Use();
2376 }
2377}
2378
2379
2380//_____________________________________________________________________
029cd327 2381Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
5443e65e 2382{
2383 // Parametrised "expected" error of the cluster reconstruction in Y
2384
2385 Double_t s = 0.08 * 0.08;
2386 return s;
2387}
2388
2389//_____________________________________________________________________
029cd327 2390Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
0a29d0f1 2391{
5443e65e 2392 // Parametrised "expected" error of the cluster reconstruction in Z
2393
a9814c09 2394 Double_t s = 9 * 9 /12.;
5443e65e 2395 return s;
2396}
2397
5443e65e 2398//_____________________________________________________________________
029cd327 2399Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
5443e65e 2400{
2401 //
029cd327 2402 // Returns radial position which corresponds to time bin <localTB>
5443e65e 2403 // in tracking sector <sector> and plane <plane>
2404 //
2405
029cd327 2406 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
5443e65e 2407 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2408 return fTrSec[sector]->GetLayer(pl)->GetX();
2409
2410}
2411
c630aafd 2412
5443e65e 2413//_______________________________________________________
2414AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
029cd327 2415 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
5443e65e 2416{
0a29d0f1 2417 //
5443e65e 2418 // AliTRDpropagationLayer constructor
0a29d0f1 2419 //
46d29e70 2420
029cd327 2421 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
2422 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
5443e65e 2423
46d29e70 2424
029cd327 2425 for(Int_t i=0; i < (Int_t) kZones; i++) {
5443e65e 2426 fZc[i]=0; fZmax[i] = 0;
a819a5f7 2427 }
5443e65e 2428
2429 fYmax = 0;
2430
2431 if(fTimeBinIndex >= 0) {
029cd327 2432 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2433 fIndex = new UInt_t[kMaxClusterPerTimeBin];
a819a5f7 2434 }
46d29e70 2435
3c625a9b 2436 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
5443e65e 2437 fHole = kFALSE;
2438 fHoleZc = 0;
2439 fHoleZmax = 0;
2440 fHoleYc = 0;
2441 fHoleYmax = 0;
2442 fHoleRho = 0;
2443 fHoleX0 = 0;
2444
2445}
2446
2447//_______________________________________________________
2448void AliTRDtracker::AliTRDpropagationLayer::SetHole(
a9814c09 2449 Double_t Zmax, Double_t Ymax, Double_t rho,
029cd327 2450 Double_t radLength, Double_t Yc, Double_t Zc)
5443e65e 2451{
2452 //
2453 // Sets hole in the layer
2454 //
5443e65e 2455 fHole = kTRUE;
2456 fHoleZc = Zc;
2457 fHoleZmax = Zmax;
2458 fHoleYc = Yc;
2459 fHoleYmax = Ymax;
2460 fHoleRho = rho;
029cd327 2461 fHoleX0 = radLength;
5443e65e 2462}
2463
46d29e70 2464
5443e65e 2465//_______________________________________________________
2466AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
2467{
2468 //
2469 // AliTRDtrackingSector Constructor
2470 //
2471
2472 fGeom = geo;
2473 fPar = par;
2474 fGeomSector = gs;
2475 fTzeroShift = 0.13;
2476 fN = 0;
3c625a9b 2477 //
2478 // get holes description from geometry
2479 Bool_t holes[AliTRDgeometry::kNcham];
2480 //printf("sector\t%d\t",gs);
2481 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
2482 holes[icham] = fGeom->IsHole(0,icham,gs);
2483 //printf("%d",holes[icham]);
2484 }
2485 //printf("\n");
2486
029cd327 2487 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
5443e65e 2488
2489
2490 AliTRDpropagationLayer* ppl;
2491
029cd327 2492 Double_t x, xin, xout, dx, rho, radLength;
5443e65e 2493 Int_t steps;
46d29e70 2494
5443e65e 2495 // set time bins in the gas of the TPC
46d29e70 2496
5443e65e 2497 xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
029cd327 2498 rho = 0.9e-3; radLength = 28.94;
5443e65e 2499
2500 for(Int_t i=0; i<steps; i++) {
2501 x = xin + i*dx + dx/2;
029cd327 2502 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2503 InsertLayer(ppl);
46d29e70 2504 }
2505
5443e65e 2506 // set time bins in the outer field cage vessel
46d29e70 2507
029cd327 2508 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2509 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2510 InsertLayer(ppl);
46d29e70 2511
029cd327 2512 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2513 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2514 InsertLayer(ppl);
2515
029cd327 2516 dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2517 steps = 5; dx = (xout - xin)/steps;
2518 for(Int_t i=0; i<steps; i++) {
2519 x = xin + i*dx + dx/2;
029cd327 2520 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2521 InsertLayer(ppl);
2522 }
2523
029cd327 2524 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2525 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2526 InsertLayer(ppl);
2527
029cd327 2528 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2529 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2530 InsertLayer(ppl);
0a29d0f1 2531
5443e65e 2532
2533 // set time bins in CO2
2534
2535 xin = xout; xout = 275.0;
2536 steps = 50; dx = (xout - xin)/steps;
029cd327 2537 rho = 1.977e-3; radLength = 36.2;
5443e65e 2538
2539 for(Int_t i=0; i<steps; i++) {
2540 x = xin + i*dx + dx/2;
029cd327 2541 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2542 InsertLayer(ppl);
2543 }
2544
2545 // set time bins in the outer containment vessel
2546
029cd327 2547 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2548 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2549 InsertLayer(ppl);
2550
029cd327 2551 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2552 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2553 InsertLayer(ppl);
2554
029cd327 2555 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2556 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2557 InsertLayer(ppl);
2558
029cd327 2559 dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2560 steps = 10; dx = (xout - xin)/steps;
2561 for(Int_t i=0; i<steps; i++) {
2562 x = xin + i*dx + dx/2;
029cd327 2563 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2564 InsertLayer(ppl);
2565 }
2566
029cd327 2567 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2568 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2569 InsertLayer(ppl);
2570
029cd327 2571 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2572 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2573 InsertLayer(ppl);
2574
029cd327 2575 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2576 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2577 InsertLayer(ppl);
2578
2579 Double_t xtrd = (Double_t) fGeom->Rmin();
2580
2581 // add layers between TPC and TRD (Air temporarily)
2582 xin = xout; xout = xtrd;
2583 steps = 50; dx = (xout - xin)/steps;
029cd327 2584 rho = 1.2e-3; radLength = 36.66;
5443e65e 2585
2586 for(Int_t i=0; i<steps; i++) {
2587 x = xin + i*dx + dx/2;
029cd327 2588 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2589 InsertLayer(ppl);
2590 }
2591
2592
3c625a9b 2593 // Double_t alpha=AliTRDgeometry::GetAlpha();
5443e65e 2594
2595 // add layers for each of the planes
2596
2597 Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
2598 Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
2599 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2600 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2601 Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
2602 Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
2603 Double_t dxPlane = dxTEC + dxSpace;
2604
029cd327 2605 Int_t tb, tbIndex;
2606 const Int_t kNchambers = AliTRDgeometry::Ncham();
3c625a9b 2607 Double_t ymax = 0;
2608 //, holeYmax = 0;
2609 Double_t ymaxsensitive=0;
029cd327 2610 Double_t *zc = new Double_t[kNchambers];
2611 Double_t *zmax = new Double_t[kNchambers];
3c625a9b 2612 Double_t *zmaxsensitive = new Double_t[kNchambers];
2613 // Double_t holeZmax = 1000.; // the whole sector is missing
5443e65e 2614
5443e65e 2615 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3c625a9b 2616 //
5443e65e 2617 // Radiator
2618 xin = xtrd + plane * dxPlane; xout = xin + dxRad;
029cd327 2619 steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2620 for(Int_t i=0; i<steps; i++) {
2621 x = xin + i*dx + dx/2;
3c625a9b 2622 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2623 InsertLayer(ppl);
2624 }
2625
3c625a9b 2626 ymax = fGeom->GetChamberWidth(plane)/2.;
2627 ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
2628
029cd327 2629 for(Int_t ch = 0; ch < kNchambers; ch++) {
2630 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
5443e65e 2631 Float_t pad = fPar->GetRowPadSize(plane,ch,0);
2632 Float_t row0 = fPar->GetRow0(plane,ch,0);
2633 Int_t nPads = fPar->GetRowMax(plane,ch,0);
857b3eb0 2634 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
3c625a9b 2635 // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
2636 zc[ch] = (pad * nPads)/2 + row0;
2637 //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
2638
5443e65e 2639 }
2640
2641 dx = fPar->GetTimeBinSize();
029cd327 2642 rho = 0.00295 * 0.85; radLength = 11.0;
5443e65e 2643
2644 Double_t x0 = (Double_t) fPar->GetTime0(plane);
2645 Double_t xbottom = x0 - dxDrift;
2646 Double_t xtop = x0 + dxAmp;
3c625a9b 2647 //
5443e65e 2648 // Amplification region
5443e65e 2649 steps = (Int_t) (dxAmp/dx);
2650
2651 for(tb = 0; tb < steps; tb++) {
2652 x = x0 + tb * dx + dx/2;
029cd327 2653 tbIndex = CookTimeBinIndex(plane, -tb-1);
2654 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2655 ppl->SetYmax(ymax,ymaxsensitive);
2656 ppl->SetZ(zc, zmax, zmaxsensitive);
2657 ppl->SetHoles(holes);
5443e65e 2658 InsertLayer(ppl);
2659 }
029cd327 2660 tbIndex = CookTimeBinIndex(plane, -steps);
5443e65e 2661 x = (x + dx/2 + xtop)/2;
2662 dx = 2*(xtop-x);
029cd327 2663 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2664 ppl->SetYmax(ymax,ymaxsensitive);
2665 ppl->SetZ(zc, zmax,zmaxsensitive);
2666 ppl->SetHoles(holes);
5443e65e 2667 InsertLayer(ppl);
2668
2669 // Drift region
2670 dx = fPar->GetTimeBinSize();
2671 steps = (Int_t) (dxDrift/dx);
2672
2673 for(tb = 0; tb < steps; tb++) {
2674 x = x0 - tb * dx - dx/2;
029cd327 2675 tbIndex = CookTimeBinIndex(plane, tb);
5443e65e 2676
029cd327 2677 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2678 ppl->SetYmax(ymax,ymaxsensitive);
2679 ppl->SetZ(zc, zmax, zmaxsensitive);
2680 ppl->SetHoles(holes);
5443e65e 2681 InsertLayer(ppl);
2682 }
029cd327 2683 tbIndex = CookTimeBinIndex(plane, steps);
5443e65e 2684 x = (x - dx/2 + xbottom)/2;
2685 dx = 2*(x-xbottom);
029cd327 2686 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2687 ppl->SetYmax(ymax,ymaxsensitive);
2688 ppl->SetZ(zc, zmax, zmaxsensitive);
2689 ppl->SetHoles(holes);
5443e65e 2690 InsertLayer(ppl);
2691
2692 // Pad Plane
029cd327 2693 xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
2694 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3c625a9b 2695 ppl->SetYmax(ymax,ymaxsensitive);
2696 ppl->SetZ(zc, zmax,zmax);
2697 ppl->SetHoles(holes);
5443e65e 2698 InsertLayer(ppl);
2699
2700 // Rohacell
2701 xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
029cd327 2702 steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2703 for(Int_t i=0; i<steps; i++) {
2704 x = xin + i*dx + dx/2;
029cd327 2705 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3c625a9b 2706 ppl->SetYmax(ymax,ymaxsensitive);
2707 ppl->SetZ(zc, zmax,zmax);
2708 ppl->SetHoles(holes);
5443e65e 2709 InsertLayer(ppl);
2710 }
2711
2712 // Space between the chambers, air
2713 xin = xout; xout = xtrd + (plane + 1) * dxPlane;
029cd327 2714 steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2715 for(Int_t i=0; i<steps; i++) {
2716 x = xin + i*dx + dx/2;
029cd327 2717 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2718 InsertLayer(ppl);
2719 }
2720 }
2721
2722 // Space between the TRD and RICH
2723 Double_t xRICH = 500.;
2724 xin = xout; xout = xRICH;
029cd327 2725 steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2726 for(Int_t i=0; i<steps; i++) {
2727 x = xin + i*dx + dx/2;
029cd327 2728 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2729 InsertLayer(ppl);
2730 }
2731
2732 MapTimeBinLayers();
029cd327 2733 delete [] zc;
2734 delete [] zmax;
5443e65e 2735
2736}
2737
2738//______________________________________________________
2739
029cd327 2740Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
5443e65e 2741{
2742 //
2743 // depending on the digitization parameters calculates "global"
029cd327 2744 // time bin index for timebin <localTB> in plane <plane>
5443e65e 2745 //
2746
2747 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2748 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2749 Double_t dx = (Double_t) fPar->GetTimeBinSize();
2750
2751 Int_t tbAmp = fPar->GetTimeBefore();
2752 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 2753 if(kTRUE) maxAmp = 0; // intentional until we change parameter class
5443e65e 2754 Int_t tbDrift = fPar->GetTimeMax();
2755 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
2756
029cd327 2757 Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
5443e65e 2758
029cd327 2759 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
5443e65e 2760
029cd327 2761 if((localTB < 0) &&
2762 (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
2763 if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
5443e65e 2764
2765 return gtb;
2766
2767
2768}
2769
2770//______________________________________________________
2771
2772void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2773{
2774 //
2775 // For all sensitive time bins sets corresponding layer index
2776 // in the array fTimeBins
2777 //
2778
2779 Int_t index;
2780
2781 for(Int_t i = 0; i < fN; i++) {
2782 index = fLayers[i]->GetTimeBinIndex();
2783
2784 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2785
2786 if(index < 0) continue;
029cd327 2787 if(index >= (Int_t) kMaxTimeBinIndex) {
5443e65e 2788 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2789 printf(" index %d exceeds allowed maximum of %d!\n",
029cd327 2790 index, kMaxTimeBinIndex-1);
5443e65e 2791 continue;
2792 }
2793 fTimeBinIndex[index] = i;
2794 }
2795
2796 Double_t x1, dx1, x2, dx2, gap;
2797
2798 for(Int_t i = 0; i < fN-1; i++) {
2799 x1 = fLayers[i]->GetX();
2800 dx1 = fLayers[i]->GetdX();
2801 x2 = fLayers[i+1]->GetX();
2802 dx2 = fLayers[i+1]->GetdX();
2803 gap = (x2 - dx2/2) - (x1 + dx1/2);
2804 if(gap < -0.01) {
2805 printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
2806 printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
2807 }
2808 if(gap > 0.01) {
2809 printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
2810 printf(" (%f - %f) - (%f + %f) = %f\n",
a9814c09 2811 x2, dx2/2, x1, dx1, gap);
5443e65e 2812 }
2813 }
2814}
2815
2816
2817//______________________________________________________
2818
2819
2820Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2821{
2822 //
2823 // Returns the number of time bin which in radial position is closest to <x>
2824 //
2825
2826 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2827 if(x <= fLayers[0]->GetX()) return 0;
2828
2829 Int_t b=0, e=fN-1, m=(b+e)/2;
2830 for (; b<e; m=(b+e)/2) {
2831 if (x > fLayers[m]->GetX()) b=m+1;
2832 else e=m;
2833 }
2834 if(TMath::Abs(x - fLayers[m]->GetX()) >
2835 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2836 else return m;
2837
2838}
2839
2840//______________________________________________________
2841
2842Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2843{
2844 //
2845 // Returns number of the innermost SENSITIVE propagation layer
2846 //
2847
2848 return GetLayerNumber(0);
2849}
2850
2851//______________________________________________________
2852
2853Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2854{
2855 //
2856 // Returns number of the outermost SENSITIVE time bin
2857 //
2858
2859 return GetLayerNumber(GetNumberOfTimeBins() - 1);
46d29e70 2860}
2861
5443e65e 2862//______________________________________________________
2863
2864Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2865{
2866 //
2867 // Returns number of SENSITIVE time bins
2868 //
2869
2870 Int_t tb, layer;
029cd327 2871 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
5443e65e 2872 layer = GetLayerNumber(tb);
2873 if(layer>=0) break;
2874 }
2875 return tb+1;
2876}
2877
2878//______________________________________________________
2879
2880void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2881{
2882 //
2883 // Insert layer <pl> in fLayers array.
2884 // Layers are sorted according to X coordinate.
2885
029cd327 2886 if ( fN == ((Int_t) kMaxLayersPerSector)) {
5443e65e 2887 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2888 return;
2889 }
2890 if (fN==0) {fLayers[fN++] = pl; return;}
2891 Int_t i=Find(pl->GetX());
2892
2893 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2894 fLayers[i]=pl; fN++;
2895
2896}
2897
2898//______________________________________________________
2899
2900Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2901{
2902 //
2903 // Returns index of the propagation layer nearest to X
2904 //
2905
2906 if (x <= fLayers[0]->GetX()) return 0;
2907 if (x > fLayers[fN-1]->GetX()) return fN;
2908 Int_t b=0, e=fN-1, m=(b+e)/2;
2909 for (; b<e; m=(b+e)/2) {
2910 if (x > fLayers[m]->GetX()) b=m+1;
2911 else e=m;
2912 }
2913 return m;
2914}
2915
3c625a9b 2916//______________________________________________________
2917void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2918{
2919 //
2920 // set centers and the width of sectors
2921 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2922 fZc[icham] = center[icham];
2923 fZmax[icham] = w[icham];
2924 fZmaxSensitive[icham] = wsensitive[icham];
2925 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2926 }
2927}
5443e65e 2928//______________________________________________________
2929
3c625a9b 2930void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2931{
2932 //
2933 // set centers and the width of sectors
2934 fHole = kFALSE;
2935 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2936 fIsHole[icham] = holes[icham];
2937 if (holes[icham]) fHole = kTRUE;
2938 }
2939}
2940
2941
2942
5443e65e 2943void AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
029cd327 2944 Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
a9814c09 2945 Bool_t &lookForCluster) const
5443e65e 2946{
2947 //
029cd327 2948 // Returns radial step <dx>, density <rho>, rad. length <radLength>,
5443e65e 2949 // and sensitivity <lookForCluster> in point <y,z>
2950 //
2951
2952 dx = fdX;
2953 rho = fRho;
029cd327 2954 radLength = fX0;
5443e65e 2955 lookForCluster = kFALSE;
3c625a9b 2956 //
2957 // check dead regions in sensitive volume
5443e65e 2958 if(fTimeBinIndex >= 0) {
3c625a9b 2959 //
2960 Int_t zone=-1;
029cd327 2961 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3c625a9b 2962 if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
2963 zone = ch;
2964 lookForCluster = !(fIsHole[zone]);
2965 if(TMath::Abs(y) > fYmaxSensitive){
2966 lookForCluster = kFALSE;
2967 }
2968 if (fIsHole[zone]) {
2969 //if hole
2970 rho = 1.29e-3;
2971 radLength = 36.66;
2972 }
2973 }
5443e65e 2974 }
3c625a9b 2975 return;
5443e65e 2976 }
3c625a9b 2977 //
2978 //
5443e65e 2979 // check hole
3c625a9b 2980 if (fHole==kFALSE) return;
2981 //
2982 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2983 if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
2984 if (fIsHole[ch]) {
2985 //if hole
2986 rho = 1.29e-3;
2987 radLength = 36.66;
2988 }
2989 }
2990 }
5443e65e 2991 return;
2992}
2993
3c625a9b 2994Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
2995{
2996 //
2997 //
2998 if (fTimeBinIndex < 0) return -20; //unknown
2999 Int_t zone=-10; // dead zone
3000 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3001 if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
3002 zone = ch;
3003 }
3004 return zone;
3005}
3006
3007
5443e65e 3008//______________________________________________________
3009
3010void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
a9814c09 3011 UInt_t index) {
5443e65e 3012
3013// Insert cluster in cluster array.
3014// Clusters are sorted according to Y coordinate.
3015
3016 if(fTimeBinIndex < 0) {
3017 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
3018 return;
3019 }
3020
029cd327 3021 if (fN== (Int_t) kMaxClusterPerTimeBin) {
5443e65e 3022 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
3023 return;
3024 }
3025 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
3026 Int_t i=Find(c->GetY());
3027 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3028 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
3029 fIndex[i]=index; fClusters[i]=c; fN++;
3030}
3031
3032//______________________________________________________
3033
3034Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const {
3035
3036// Returns index of the cluster nearest in Y
3037
3038 if (y <= fClusters[0]->GetY()) return 0;
3039 if (y > fClusters[fN-1]->GetY()) return fN;
3040 Int_t b=0, e=fN-1, m=(b+e)/2;
3041 for (; b<e; m=(b+e)/2) {
3042 if (y > fClusters[m]->GetY()) b=m+1;
3043 else e=m;
3044 }
3045 return m;
3046}
3047
fd621f36 3048//---------------------------------------------------------
5443e65e 3049
fd621f36 3050Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
3051//
3052// Returns correction factor for tilted pads geometry
3053//
5443e65e 3054
fd621f36 3055 Double_t h01 = sin(TMath::Pi() / 180.0 * fPar->GetTiltingAngle());
3056 Int_t det = c->GetDetector();
3057 Int_t plane = fGeom->GetPlane(det);
b3a5a838 3058
3059 if((plane == 1) || (plane == 3) || (plane == 5)) h01=-h01;
b8dc2353 3060
3061 if(fNoTilt) h01 = 0;
fd621f36 3062
3063 return h01;
3064}
5443e65e 3065
c630aafd 3066
3067
3068
3069
3070