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Make AliTRDgeometryFull default
[u/mrichter/AliRoot.git] / TRD / AliTRDtracker.cxx
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46d29e70 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
0fa7dfa7 16/* $Id$ */
bbf92647 17
029cd327 18///////////////////////////////////////////////////////////////////////////////
19// //
20// The standard TRD tracker //
21// //
22///////////////////////////////////////////////////////////////////////////////
23
a2cb5b3d 24#include <Riostream.h>
46d29e70 25#include <TFile.h>
46d29e70 26#include <TBranch.h>
5443e65e 27#include <TTree.h>
c630aafd 28#include <TObjArray.h>
46d29e70 29
46d29e70 30#include "AliTRDgeometry.h"
5443e65e 31#include "AliTRDparameter.h"
32#include "AliTRDgeometryDetail.h"
3c625a9b 33#include "AliTRDgeometryHole.h"
46d29e70 34#include "AliTRDcluster.h"
35#include "AliTRDtrack.h"
c630aafd 36#include "AliTRDPartID.h"
5443e65e 37#include "../TPC/AliTPCtrack.h"
46d29e70 38
39#include "AliTRDtracker.h"
40
41ClassImp(AliTRDtracker)
42
029cd327 43 const Float_t AliTRDtracker::fgkSeedDepth = 0.5;
44 const Float_t AliTRDtracker::fgkSeedStep = 0.10;
45 const Float_t AliTRDtracker::fgkSeedGap = 0.25;
5443e65e 46
029cd327 47 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ12 = 40.;
48 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ = 25.;
49 const Float_t AliTRDtracker::fgkMaxSeedC = 0.0052;
50 const Float_t AliTRDtracker::fgkMaxSeedTan = 1.2;
51 const Float_t AliTRDtracker::fgkMaxSeedVertexZ = 150.;
a819a5f7 52
029cd327 53 const Double_t AliTRDtracker::fgkSeedErrorSY = 0.2;
54 const Double_t AliTRDtracker::fgkSeedErrorSY3 = 2.5;
55 const Double_t AliTRDtracker::fgkSeedErrorSZ = 0.1;
bbf92647 56
029cd327 57 const Float_t AliTRDtracker::fgkMinClustersInSeed = 0.7;
bbf92647 58
029cd327 59 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
60 const Float_t AliTRDtracker::fgkMinFractionOfFoundClusters = 0.8;
bbf92647 61
029cd327 62 const Float_t AliTRDtracker::fgkSkipDepth = 0.3;
63 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
64 const Float_t AliTRDtracker::fgkWideRoad = 20.;
5443e65e 65
029cd327 66 const Double_t AliTRDtracker::fgkMaxChi2 = 12.;
a819a5f7 67
029cd327 68const Int_t AliTRDtracker::fgkFirstPlane = 5;
69const Int_t AliTRDtracker::fgkLastPlane = 17;
9c9d2487 70
bbf92647 71
89f05372 72//____________________________________________________________________
73AliTRDtracker::AliTRDtracker():AliTracker(),
74 fGeom(0),
75 fPar(0),
76 fNclusters(0),
77 fClusters(0),
78 fNseeds(0),
79 fSeeds(0),
80 fNtracks(0),
81 fTracks(0),
82 fSY2corr(0),
83 fSZ2corr(0),
84 fTimeBinsPerPlane(0),
85 fMaxGap(0),
86 fVocal(kFALSE),
87 fAddTRDseeds(kFALSE),
88 fNoTilt(kFALSE)
89{
90 for(Int_t i=0;i<kTrackingSectors;i++) fTrSec[i]=0;
91 for(Int_t j=0;j<5;j++)
92 for(Int_t k=0;k<18;k++) fHoles[j][k]=kFALSE;
93}
46d29e70 94//____________________________________________________________________
c630aafd 95AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker()
46d29e70 96{
5443e65e 97 //
98 // Main constructor
99 //
46d29e70 100
c630aafd 101 //Float_t fTzero = 0;
b8dc2353 102
5443e65e 103 fAddTRDseeds = kFALSE;
5443e65e 104 fGeom = NULL;
b8dc2353 105 fNoTilt = kFALSE;
5443e65e 106
107 TDirectory *savedir=gDirectory;
108 TFile *in=(TFile*)geomfile;
109 if (!in->IsOpen()) {
110 printf("AliTRDtracker::AliTRDtracker(): geometry file is not open!\n");
111 printf(" DETAIL TRD geometry and DEFAULT TRD parameter will be used\n");
112 }
113 else {
114 in->cd();
c630aafd 115// in->ls();
5443e65e 116 fGeom = (AliTRDgeometry*) in->Get("TRDgeometry");
117 fPar = (AliTRDparameter*) in->Get("TRDparameter");
c630aafd 118// fGeom->Dump();
5443e65e 119 }
46d29e70 120
5443e65e 121 if(fGeom) {
122 // fTzero = geo->GetT0();
b8dc2353 123 printf("Found geometry version %d on file \n", fGeom->IsVersion());
5443e65e 124 }
125 else {
c630aafd 126 printf("AliTRDtracker::AliTRDtracker(): can't find TRD geometry!\n");
3c625a9b 127 //printf("The DETAIL TRD geometry will be used\n");
128 //fGeom = new AliTRDgeometryDetail();
129 fGeom = new AliTRDgeometryHole();
130 fGeom->SetPHOShole();
131 fGeom->SetRICHhole();
c630aafd 132 }
133
134 if (!fPar) {
135 printf("AliTRDtracker::AliTRDtracker(): can't find TRD parameter!\n");
136 printf("The DEFAULT TRD parameter will be used\n");
5443e65e 137 fPar = new AliTRDparameter();
138 }
c630aafd 139 fPar->ReInit();
5443e65e 140
141 savedir->cd();
46d29e70 142
5443e65e 143
144 // fGeom->SetT0(fTzero);
0a29d0f1 145
46d29e70 146 fNclusters = 0;
147 fClusters = new TObjArray(2000);
148 fNseeds = 0;
5443e65e 149 fSeeds = new TObjArray(2000);
46d29e70 150 fNtracks = 0;
5443e65e 151 fTracks = new TObjArray(1000);
a819a5f7 152
029cd327 153 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
154 Int_t trS = CookSectorIndex(geomS);
155 fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS, fPar);
3c625a9b 156 for (Int_t icham=0;icham<AliTRDgeometry::kNcham; icham++){
157 fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS);
158 }
5443e65e 159 }
a819a5f7 160
029cd327 161 Float_t tiltAngle = TMath::Abs(fPar->GetTiltingAngle());
162 if(tiltAngle < 0.1) {
b8dc2353 163 fNoTilt = kTRUE;
164 }
165
166 fSY2corr = 0.2;
167 fSZ2corr = 120.;
168
029cd327 169 if(fNoTilt && (tiltAngle > 0.1)) fSY2corr = fSY2corr + tiltAngle * 0.05;
b8dc2353 170
bbf92647 171
5443e65e 172 // calculate max gap on track
a819a5f7 173
5443e65e 174 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
175 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
a819a5f7 176
5443e65e 177 Double_t dx = (Double_t) fPar->GetTimeBinSize();
178 Int_t tbAmp = fPar->GetTimeBefore();
179 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 180 if(kTRUE) maxAmp = 0; // intentional until we change the parameter class
5443e65e 181 Int_t tbDrift = fPar->GetTimeMax();
182 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
a819a5f7 183
5443e65e 184 tbDrift = TMath::Min(tbDrift,maxDrift);
185 tbAmp = TMath::Min(tbAmp,maxAmp);
46d29e70 186
5443e65e 187 fTimeBinsPerPlane = tbAmp + tbDrift;
029cd327 188 fMaxGap = (Int_t) (fTimeBinsPerPlane * fGeom->Nplan() * fgkSkipDepth);
46d29e70 189
5443e65e 190 fVocal = kFALSE;
0a29d0f1 191
9c9d2487 192
193 // Barrel Tracks [SR, 03.04.2003]
194
195 fBarrelFile = 0;
196 fBarrelTree = 0;
197 fBarrelArray = 0;
198 fBarrelTrack = 0;
199
200 savedir->cd();
5443e65e 201}
46d29e70 202
5443e65e 203//___________________________________________________________________
204AliTRDtracker::~AliTRDtracker()
46d29e70 205{
029cd327 206 //
207 // Destructor of AliTRDtracker
208 //
209
89f05372 210 if (fClusters) {
211 fClusters->Delete();
212 delete fClusters;
213 }
214 if (fTracks) {
215 fTracks->Delete();
216 delete fTracks;
217 }
218 if (fSeeds) {
219 fSeeds->Delete();
220 delete fSeeds;
221 }
5443e65e 222 delete fGeom;
223 delete fPar;
0a29d0f1 224
029cd327 225 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
226 delete fTrSec[geomS];
5443e65e 227 }
228}
46d29e70 229
9c9d2487 230//_____________________________________________________________________
231
232void AliTRDtracker::SetBarrelTree(const char *mode) {
233 //
234 //
235 //
236
237 if (!IsStoringBarrel()) return;
238
239 TDirectory *sav = gDirectory;
240 if (!fBarrelFile) fBarrelFile = new TFile("AliBarrelTracks.root", "UPDATE");
241
242 char buff[40];
243 sprintf(buff, "BarrelTRD_%d_%s", GetEventNumber(), mode);
244
245 fBarrelFile->cd();
246 fBarrelTree = new TTree(buff, "Barrel TPC tracks");
247
029cd327 248 Int_t nRefs = fgkLastPlane - fgkFirstPlane + 1;
9c9d2487 249
250 if (!fBarrelArray) fBarrelArray = new TClonesArray("AliBarrelTrack", nRefs);
251 for(Int_t i=0; i<nRefs; i++) new((*fBarrelArray)[i]) AliBarrelTrack();
252
253 fBarrelTree->Branch("tracks", &fBarrelArray);
254 sav->cd();
255}
256
257//_____________________________________________________________________
258
259void AliTRDtracker::StoreBarrelTrack(AliTRDtrack *ps, Int_t refPlane, Int_t isIn) {
260 //
261 //
262 //
263
264 if (!IsStoringBarrel()) return;
265
266 static Int_t nClusters;
267 static Int_t nWrong;
268 static Double_t chi2;
269 static Int_t index;
270 static Bool_t wasLast = kTRUE;
271
272 Int_t newClusters, newWrong;
273 Double_t newChi2;
274
275 if (wasLast) {
276
277 fBarrelArray->Clear();
278 nClusters = nWrong = 0;
279 chi2 = 0.0;
280 index = 0;
281 wasLast = kFALSE;
282 }
283
284 fBarrelTrack = (AliBarrelTrack*)(*fBarrelArray)[index++];
285 ps->GetBarrelTrack(fBarrelTrack);
286
287 newClusters = ps->GetNumberOfClusters() - nClusters;
288 newWrong = ps->GetNWrong() - nWrong;
289 newChi2 = ps->GetChi2() - chi2;
290
291 nClusters = ps->GetNumberOfClusters();
292 nWrong = ps->GetNWrong();
293 chi2 = ps->GetChi2();
294
029cd327 295 if (refPlane != fgkLastPlane) {
9c9d2487 296 fBarrelTrack->SetNClusters(newClusters, newChi2);
297 fBarrelTrack->SetNWrongClusters(newWrong);
298 } else {
299 wasLast = kTRUE;
300 }
301
302 fBarrelTrack->SetRefPlane(refPlane, isIn);
303}
304
305//_____________________________________________________________________
306
307Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track) {
308 //
309 // Rotates the track when necessary
310 //
311
312 Double_t alpha = AliTRDgeometry::GetAlpha();
313 Double_t y = track->GetY();
314 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
315
c630aafd 316 //Int_t ns = AliTRDgeometry::kNsect;
9c9d2487 317 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
318
319 if (y > ymax) {
320 //s = (s+1) % ns;
321 if (!track->Rotate(alpha)) return kFALSE;
322 } else if (y <-ymax) {
323 //s = (s-1+ns) % ns;
324 if (!track->Rotate(-alpha)) return kFALSE;
325 }
326
327 return kTRUE;
328}
329
46d29e70 330//_____________________________________________________________________
5443e65e 331inline Double_t f1trd(Double_t x1,Double_t y1,
a9814c09 332 Double_t x2,Double_t y2,
333 Double_t x3,Double_t y3)
46d29e70 334{
0a29d0f1 335 //
46d29e70 336 // Initial approximation of the track curvature
0a29d0f1 337 //
46d29e70 338 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
339 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
340 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
341 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
342 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
343
344 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
345
346 return -xr*yr/sqrt(xr*xr+yr*yr);
347}
348
349//_____________________________________________________________________
5443e65e 350inline Double_t f2trd(Double_t x1,Double_t y1,
a9814c09 351 Double_t x2,Double_t y2,
352 Double_t x3,Double_t y3)
46d29e70 353{
0a29d0f1 354 //
5443e65e 355 // Initial approximation of the track curvature times X coordinate
356 // of the center of curvature
0a29d0f1 357 //
46d29e70 358
359 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
360 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
361 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
362 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
363 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
364
365 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
366
367 return -a/(d*y1-b)*xr/sqrt(xr*xr+yr*yr);
368}
369
370//_____________________________________________________________________
5443e65e 371inline Double_t f3trd(Double_t x1,Double_t y1,
a9814c09 372 Double_t x2,Double_t y2,
373 Double_t z1,Double_t z2)
46d29e70 374{
0a29d0f1 375 //
46d29e70 376 // Initial approximation of the tangent of the track dip angle
0a29d0f1 377 //
46d29e70 378
379 return (z1 - z2)/sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
380}
381
46e2d86c 382
383AliTRDcluster * AliTRDtracker::GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin){
384 //
385 //try to find cluster in the backup list
386 //
387 AliTRDcluster * cl =0;
388 UInt_t *indexes = track->GetBackupIndexes();
389 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
390 if (indexes[i]==0) break;
391 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
392 if (!cli) break;
393 if (cli->GetLocalTimeBin()!=timebin) continue;
394 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
395 if (iplane==plane) {
396 cl = cli;
397 break;
398 }
399 }
400 return cl;
401}
402
3c625a9b 403
404Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * track){
405 //
406 //return last updated plane
407 Int_t lastplane=0;
408 UInt_t *indexes = track->GetBackupIndexes();
409 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
410 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
411 if (!cli) break;
412 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
413 if (iplane>lastplane) {
414 lastplane = iplane;
415 }
416 }
417 return lastplane;
418}
46d29e70 419//___________________________________________________________________
5443e65e 420Int_t AliTRDtracker::Clusters2Tracks(const TFile *inp, TFile *out)
46d29e70 421{
0a29d0f1 422 //
5443e65e 423 // Finds tracks within the TRD. File <inp> is expected to contain seeds
424 // at the outer part of the TRD. If <inp> is NULL, the seeds
425 // are found within the TRD if fAddTRDseeds is TRUE.
426 // The tracks are propagated to the innermost time bin
427 // of the TRD and stored in file <out>.
0a29d0f1 428 //
a819a5f7 429
5443e65e 430 LoadEvent();
431
432 TDirectory *savedir=gDirectory;
a819a5f7 433
5443e65e 434 char tname[100];
a819a5f7 435
5443e65e 436 if (!out->IsOpen()) {
437 cerr<<"AliTRDtracker::Clusters2Tracks(): output file is not open !\n";
438 return 1;
439 }
46d29e70 440
e24ea474 441 sprintf(tname,"seedTRDtoTPC_%d",GetEventNumber());
029cd327 442 TTree tpcTree(tname,"Tree with seeds from TRD at outer TPC pad row");
5443e65e 443 AliTPCtrack *iotrack=0;
029cd327 444 tpcTree.Branch("tracks","AliTPCtrack",&iotrack,32000,0);
5443e65e 445
e24ea474 446 sprintf(tname,"TreeT%d_TRD",GetEventNumber());
029cd327 447 TTree trdTree(tname,"TRD tracks at inner TRD time bin");
448 AliTRDtrack *iotrackTRD=0;
449 trdTree.Branch("tracks","AliTRDtrack",&iotrackTRD,32000,0);
5443e65e 450
451 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
029cd327 452 Float_t foundMin = fgkMinClustersInTrack * timeBins;
5443e65e 453
454 if (inp) {
455 TFile *in=(TFile*)inp;
456 if (!in->IsOpen()) {
c630aafd 457 cerr<<
458 "AliTRDtracker::Clusters2Tracks(): file with seeds is not open !\n";
5443e65e 459 cerr<<" ... going for seeds finding inside the TRD\n";
460 }
461 else {
462 in->cd();
e24ea474 463 sprintf(tname,"TRDb_%d",GetEventNumber());
5443e65e 464 TTree *seedTree=(TTree*)in->Get(tname);
465 if (!seedTree) {
a9814c09 466 cerr<<"AliTRDtracker::Clusters2Tracks(): ";
467 cerr<<"can't get a tree with track seeds !\n";
468 return 3;
5443e65e 469 }
470 AliTRDtrack *seed=new AliTRDtrack;
471 seedTree->SetBranchAddress("tracks",&seed);
472
473 Int_t n=(Int_t)seedTree->GetEntries();
474 for (Int_t i=0; i<n; i++) {
a9814c09 475 seedTree->GetEvent(i);
476 seed->ResetCovariance();
477 AliTRDtrack *tr = new AliTRDtrack(*seed,seed->GetAlpha());
478 fSeeds->AddLast(tr);
479 fNseeds++;
5443e65e 480 }
481 delete seed;
fd621f36 482 delete seedTree;
5443e65e 483 }
484 }
46d29e70 485
5443e65e 486 out->cd();
46d29e70 487
fd621f36 488
5443e65e 489 // find tracks from loaded seeds
a819a5f7 490
5443e65e 491 Int_t nseed=fSeeds->GetEntriesFast();
492 Int_t i, found = 0;
493 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
494
495 for (i=0; i<nseed; i++) {
496 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
497 FollowProlongation(t, innerTB);
498 if (t.GetNumberOfClusters() >= foundMin) {
499 UseClusters(&t);
029cd327 500 CookLabel(pt, 1-fgkLabelFraction);
5443e65e 501 // t.CookdEdx();
502 }
029cd327 503 iotrackTRD = pt;
504 trdTree.Fill();
e24ea474 505 found++;
506// cout<<found<<'\r';
5443e65e 507
508 if(PropagateToTPC(t)) {
509 AliTPCtrack *tpc = new AliTPCtrack(*pt,pt->GetAlpha());
510 iotrack = tpc;
029cd327 511 tpcTree.Fill();
5443e65e 512 delete tpc;
513 }
514 delete fSeeds->RemoveAt(i);
515 fNseeds--;
516 }
a819a5f7 517
5443e65e 518 cout<<"Number of loaded seeds: "<<nseed<<endl;
519 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
a819a5f7 520
5443e65e 521 // after tracks from loaded seeds are found and the corresponding
522 // clusters are used, look for additional seeds from TRD
46d29e70 523
5443e65e 524 if(fAddTRDseeds) {
525 // Find tracks for the seeds in the TRD
526 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
527
029cd327 528 Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
529 Int_t gap = (Int_t) (timeBins * fgkSeedGap);
530 Int_t step = (Int_t) (timeBins * fgkSeedStep);
5443e65e 531
532 // make a first turn with tight cut on initial curvature
533 for(Int_t turn = 1; turn <= 2; turn++) {
534 if(turn == 2) {
029cd327 535 nSteps = (Int_t) (fgkSeedDepth / (3*fgkSeedStep));
536 step = (Int_t) (timeBins * (3*fgkSeedStep));
5443e65e 537 }
538 for(Int_t i=0; i<nSteps; i++) {
a9814c09 539 Int_t outer=timeBins-1-i*step;
540 Int_t inner=outer-gap;
46d29e70 541
a9814c09 542 nseed=fSeeds->GetEntriesFast();
5443e65e 543
a9814c09 544 MakeSeeds(inner, outer, turn);
5443e65e 545
a9814c09 546 nseed=fSeeds->GetEntriesFast();
7bed16a7 547 // printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
548 // turn, i, nseed);
a9814c09 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();
7bed16a7 660 // printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
661 // turn, i, nseed);
c630aafd 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++;
7bed16a7 907 Float_t p4 = track->GetC();
908 //
3c625a9b 909 Int_t expectedClr = FollowBackProlongation(*track);
910 if (track->GetNumberOfClusters()<expectedClr/3){
911 AliTRDtrack *track1 = new AliTRDtrack(*seed);
912 track1->SetSeedLabel(lbl);
913 FollowBackProlongation(*track1);
914 AliTRDtrack *track2= new AliTRDtrack(*seed);
915 track->SetSeedLabel(lbl);
916 FollowBackProlongation(*track2);
917 delete track1;
918 delete track2;
919 }
7bed16a7 920 if (TMath::Abs(track->GetC()-p4)/TMath::Abs(p4)>0.2) {
921 delete track;
922 continue; //too big change of curvature - to be checked
923 }
c630aafd 924 Int_t foundClr = track->GetNumberOfClusters();
925 if (foundClr >= foundMin) {
926 if(foundClr >= 2) {
927 track->CookdEdx();
029cd327 928// CookLabel(track, 1-fgkLabelFraction);
c630aafd 929 UseClusters(track);
930 }
931
932 // Propagate to outer reference plane [SR, GSI, 18.02.2003]
933// track->PropagateTo(364.8); why?
934
935 //seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
936 //found++;
937 }
938
1e9bb598 939 //Propagation to the TOF (I.Belikov)
3c625a9b 940
941 if (track->GetStop()==kFALSE){
3c625a9b 942
b94f0a96 943 Double_t xtof=371.;
3c625a9b 944 Double_t c2=track->GetC()*xtof - track->GetEta();
7bed16a7 945 if (TMath::Abs(c2)>=0.85) continue;
b94f0a96 946 Double_t xTOF0 = 371. ;
7bed16a7 947 PropagateToOuterPlane(*track,xTOF0);
948 //
3c625a9b 949 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
950 Double_t y=track->GetYat(xtof);
951 if (y > ymax) {
7ac6fa52 952 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
953 delete track;
7bed16a7 954 continue;
7ac6fa52 955 }
3c625a9b 956 } else if (y <-ymax) {
7ac6fa52 957 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
958 delete track;
7bed16a7 959 continue;
7ac6fa52 960 }
3c625a9b 961 }
962
963 if (track->PropagateTo(xtof)) {
964 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
965 if (track->GetNumberOfClusters()>foundMin) found++;
966 }
967 }else{
968 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
969 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
b94f0a96 970 seed->SetStatus(AliESDtrack::kTRDStop);
3c625a9b 971 found++;
972 }
1e9bb598 973 }
974
d9b8978b 975 delete track;
3c625a9b 976
1e9bb598 977 //End of propagation to the TOF
3c625a9b 978 //if (foundClr>foundMin)
979 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
980
c630aafd 981
982 }
983
984 cerr<<"Number of seeds: "<<fNseeds<<endl;
985 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
986
1e9bb598 987 fSeeds->Clear(); fNseeds=0;
988
989 return 0;
990
991}
992
993//_____________________________________________________________________________
994Int_t AliTRDtracker::RefitInward(AliESD* event)
995{
996 //
997 // Refits tracks within the TRD. The ESD event is expected to contain seeds
998 // at the outer part of the TRD.
999 // The tracks are propagated to the innermost time bin
1000 // of the TRD and the ESD event is updated
1001 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1002 //
1003
1004 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
1005 Float_t foundMin = fgkMinClustersInTrack * timeBins;
1006 Int_t nseed = 0;
1007 Int_t found = 0;
1008 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
1009
1010 Int_t n = event->GetNumberOfTracks();
1011 for (Int_t i=0; i<n; i++) {
1012 AliESDtrack* seed=event->GetTrack(i);
1013 ULong_t status=seed->GetStatus();
1014 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
46e2d86c 1015 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
1e9bb598 1016 nseed++;
1017
1018 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
3c625a9b 1019 seed2->ResetCovariance(5.);
1e9bb598 1020 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
46e2d86c 1021 UInt_t * indexes2 = seed2->GetIndexes();
1022 UInt_t * indexes3 = pt->GetBackupIndexes();
1023 for (Int_t i=0;i<200;i++) {
1024 if (indexes2[i]==0) break;
1025 indexes3[i] = indexes2[i];
1026 }
1027 //AliTRDtrack *pt = seed2;
1e9bb598 1028 AliTRDtrack &t=*pt;
1029 FollowProlongation(t, innerTB);
7bed16a7 1030 /*
46e2d86c 1031 if (t.GetNumberOfClusters()<seed->GetTRDclusters(indexes3)*0.5){
1032 // debug - why we dont go back?
1033 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1034 UInt_t * indexes2 = seed2->GetIndexes();
1035 UInt_t * indexes3 = pt2->GetBackupIndexes();
1036 for (Int_t i=0;i<200;i++) {
1037 if (indexes2[i]==0) break;
1038 indexes3[i] = indexes2[i];
1039 }
3c625a9b 1040 FollowProlongation(*pt2, innerTB);
1041 delete pt2;
46e2d86c 1042 }
7bed16a7 1043 */
1e9bb598 1044 if (t.GetNumberOfClusters() >= foundMin) {
46e2d86c 1045 // UseClusters(&t);
1046 //CookLabel(pt, 1-fgkLabelFraction);
1e9bb598 1047 // t.CookdEdx();
1048 }
1049 found++;
1050// cout<<found<<'\r';
1051
1052 if(PropagateToTPC(t)) {
0fa7dfa7 1053 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
7bed16a7 1054 }else{
1055 //if not prolongation to TPC - propagate without update
1056 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
1057 seed2->ResetCovariance(5.);
1058 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1059 delete seed2;
1060 if (PropagateToTPC(*pt2))
1061 seed->UpdateTrackParams(pt2, AliESDtrack::kTRDrefit);
1062 delete pt2;
1e9bb598 1063 }
7bed16a7 1064
1e9bb598 1065 delete seed2;
1066 delete pt;
1067 }
1068
1069 cout<<"Number of loaded seeds: "<<nseed<<endl;
1070 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
1071
c630aafd 1072 return 0;
1073
1074}
1075
bbf92647 1076
5443e65e 1077//---------------------------------------------------------------------------
1078Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
1079{
1080 // Starting from current position on track=t this function tries
1081 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1082 // if a close cluster is found. Returns the number of clusters
1083 // expected to be found in sensitive layers
bbf92647 1084
5443e65e 1085 Float_t wIndex, wTB, wChi2;
1086 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1087 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1088 Float_t wPx, wPy, wPz, wC;
029cd327 1089 Double_t px, py, pz;
5443e65e 1090 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
3c625a9b 1091 Int_t lastplane = GetLastPlane(&t);
46d29e70 1092
5443e65e 1093 Int_t trackIndex = t.GetLabel();
46d29e70 1094
5443e65e 1095 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
46d29e70 1096
029cd327 1097 Int_t tryAgain=fMaxGap;
46d29e70 1098
5443e65e 1099 Double_t alpha=t.GetAlpha();
c630aafd 1100 alpha = TVector2::Phi_0_2pi(alpha);
46d29e70 1101
5443e65e 1102 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
029cd327 1103 Double_t radLength, rho, x, dx, y, ymax, z;
46d29e70 1104
5443e65e 1105 Int_t expectedNumberOfClusters = 0;
1106 Bool_t lookForCluster;
46d29e70 1107
5443e65e 1108 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1109
5443e65e 1110
1111 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1112
1113 y = t.GetY(); z = t.GetZ();
1114
1115 // first propagate to the inner surface of the current time bin
029cd327 1116 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1117 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1118 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1119 y = t.GetY();
1120 ymax = x*TMath::Tan(0.5*alpha);
1121 if (y > ymax) {
1122 s = (s+1) % ns;
1123 if (!t.Rotate(alpha)) break;
029cd327 1124 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1125 } else if (y <-ymax) {
1126 s = (s-1+ns) % ns;
1127 if (!t.Rotate(-alpha)) break;
029cd327 1128 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1129 }
46d29e70 1130
5443e65e 1131 y = t.GetY(); z = t.GetZ();
1132
1133 // now propagate to the middle plane of the next time bin
029cd327 1134 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1135 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1136 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1137 y = t.GetY();
1138 ymax = x*TMath::Tan(0.5*alpha);
1139 if (y > ymax) {
1140 s = (s+1) % ns;
1141 if (!t.Rotate(alpha)) break;
029cd327 1142 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1143 } else if (y <-ymax) {
1144 s = (s-1+ns) % ns;
1145 if (!t.Rotate(-alpha)) break;
029cd327 1146 if(!t.PropagateTo(x,radLength,rho)) break;
5443e65e 1147 }
46d29e70 1148
46d29e70 1149
5443e65e 1150 if(lookForCluster) {
a819a5f7 1151
5443e65e 1152 expectedNumberOfClusters++;
5443e65e 1153 wIndex = (Float_t) t.GetLabel();
1154 wTB = nr;
46d29e70 1155
029cd327 1156 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
46d29e70 1157
5443e65e 1158 Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
5443e65e 1159 Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
46d29e70 1160
5443e65e 1161 Double_t road;
1162 if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
1163 else return expectedNumberOfClusters;
1164
1165 wYrt = (Float_t) y;
1166 wZrt = (Float_t) z;
1167 wYwindow = (Float_t) road;
029cd327 1168 t.GetPxPyPz(px,py,pz);
1169 wPx = (Float_t) px;
1170 wPy = (Float_t) py;
1171 wPz = (Float_t) pz;
5443e65e 1172 wC = (Float_t) t.GetC();
1173 wSigmaC2 = (Float_t) t.GetSigmaC2();
1174 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1175 wSigmaY2 = (Float_t) t.GetSigmaY2();
1176 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1177 wChi2 = -1;
1178
5443e65e 1179
1180 AliTRDcluster *cl=0;
1181 UInt_t index=0;
1182
029cd327 1183 Double_t maxChi2=fgkMaxChi2;
5443e65e 1184
1185 wYclosest = 12345678;
1186 wYcorrect = 12345678;
1187 wZclosest = 12345678;
1188 wZcorrect = 12345678;
1189 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1190
1191 // Find the closest correct cluster for debugging purposes
029cd327 1192 if (timeBin) {
a9814c09 1193 Float_t minDY = 1000000;
029cd327 1194 for (Int_t i=0; i<timeBin; i++) {
1195 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1196 if((c->GetLabel(0) != trackIndex) &&
1197 (c->GetLabel(1) != trackIndex) &&
1198 (c->GetLabel(2) != trackIndex)) continue;
1199 if(TMath::Abs(c->GetY() - y) > minDY) continue;
1200 minDY = TMath::Abs(c->GetY() - y);
1201 wYcorrect = c->GetY();
1202 wZcorrect = c->GetZ();
1203
1204 Double_t h01 = GetTiltFactor(c);
1205 wChi2 = t.GetPredictedChi2(c, h01);
1206 }
5443e65e 1207 }
46d29e70 1208
5443e65e 1209 // Now go for the real cluster search
a819a5f7 1210
029cd327 1211 if (timeBin) {
46e2d86c 1212 //
1213 //find cluster in history
1214 cl =0;
1215
1216 AliTRDcluster * cl0 = timeBin[0];
1217 if (!cl0) {
1218 continue;
1219 }
1220 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
3c625a9b 1221 if (plane>lastplane) continue;
46e2d86c 1222 Int_t timebin = cl0->GetLocalTimeBin();
1223 AliTRDcluster * cl2= GetCluster(&t,plane, timebin);
3c625a9b 1224 if (cl2) {
1225 cl =cl2;
1226 Double_t h01 = GetTiltFactor(cl);
1227 maxChi2=t.GetPredictedChi2(cl,h01);
1228 }
46e2d86c 1229 if ((!cl) && road>fgkWideRoad) {
1230 //if (t.GetNumberOfClusters()>4)
1231 // cerr<<t.GetNumberOfClusters()
1232 // <<"FindProlongation warning: Too broad road !\n";
1233 continue;
1234 }
1235
1236
1237 if(!cl){
1238
1239 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1240 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1241 if (c->GetY() > y+road) break;
1242 if (c->IsUsed() > 0) continue;
1243 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1244
1245 Double_t h01 = GetTiltFactor(c);
1246 Double_t chi2=t.GetPredictedChi2(c,h01);
1247
1248 if (chi2 > maxChi2) continue;
1249 maxChi2=chi2;
1250 cl=c;
1251 index=timeBin.GetIndex(i);
1252 }
1253 }
a9814c09 1254
1255 if(!cl) {
1256
029cd327 1257 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1258 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1259
1260 if (c->GetY() > y+road) break;
1261 if (c->IsUsed() > 0) continue;
1262 if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
1263
1264 Double_t h01 = GetTiltFactor(c);
1265 Double_t chi2=t.GetPredictedChi2(c, h01);
1266
029cd327 1267 if (chi2 > maxChi2) continue;
1268 maxChi2=chi2;
a9814c09 1269 cl=c;
029cd327 1270 index=timeBin.GetIndex(i);
a9814c09 1271 }
1272 }
a9814c09 1273 if (cl) {
1274 wYclosest = cl->GetY();
1275 wZclosest = cl->GetZ();
1276 Double_t h01 = GetTiltFactor(cl);
1277
1278 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
46e2d86c 1279 //printf("Track position\t%f\t%f\t%f\n",t.GetX(),t.GetY(),t.GetZ());
1280 //printf("Cluster position\t%d\t%f\t%f\n",cl->GetLocalTimeBin(),cl->GetY(),cl->GetZ());
3c625a9b 1281 Int_t det = cl->GetDetector();
1282 Int_t plane = fGeom->GetPlane(det);
46e2d86c 1283
3c625a9b 1284 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1285 //if(!t.Update(cl,maxChi2,index,h01)) {
1286 //if(!tryAgain--) return 0;
a9814c09 1287 }
029cd327 1288 else tryAgain=fMaxGap;
a9814c09 1289 }
1290 else {
3c625a9b 1291 //if (tryAgain==0) break;
029cd327 1292 tryAgain--;
a9814c09 1293 }
1294
1295 /*
1296 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1297
1298 printf(" %f", wIndex); //1
1299 printf(" %f", wTB); //2
1300 printf(" %f", wYrt); //3
1301 printf(" %f", wYclosest); //4
1302 printf(" %f", wYcorrect); //5
1303 printf(" %f", wYwindow); //6
1304 printf(" %f", wZrt); //7
1305 printf(" %f", wZclosest); //8
1306 printf(" %f", wZcorrect); //9
1307 printf(" %f", wZwindow); //10
1308 printf(" %f", wPx); //11
1309 printf(" %f", wPy); //12
1310 printf(" %f", wPz); //13
1311 printf(" %f", wSigmaC2*1000000); //14
1312 printf(" %f", wSigmaTgl2*1000); //15
1313 printf(" %f", wSigmaY2); //16
1314 // printf(" %f", wSigmaZ2); //17
1315 printf(" %f", wChi2); //17
1316 printf(" %f", wC); //18
1317 printf("\n");
1318 }
1319 */
5443e65e 1320 }
1321 }
1322 }
1323 return expectedNumberOfClusters;
1324
1325
1326}
a819a5f7 1327
5443e65e 1328//___________________________________________________________________
46d29e70 1329
5443e65e 1330Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
1331{
1332 // Starting from current radial position of track <t> this function
1333 // extrapolates the track up to outer timebin and in the sensitive
1334 // layers confirms prolongation if a close cluster is found.
1335 // Returns the number of clusters expected to be found in sensitive layers
46d29e70 1336
5443e65e 1337 Float_t wIndex, wTB, wChi2;
1338 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1339 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1340 Float_t wPx, wPy, wPz, wC;
029cd327 1341 Double_t px, py, pz;
5443e65e 1342 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
46d29e70 1343
5443e65e 1344 Int_t trackIndex = t.GetLabel();
029cd327 1345 Int_t tryAgain=fMaxGap;
46d29e70 1346
5443e65e 1347 Double_t alpha=t.GetAlpha();
9c9d2487 1348 TVector2::Phi_0_2pi(alpha);
46d29e70 1349
9c9d2487 1350 Int_t s;
46d29e70 1351
5443e65e 1352 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
029cd327 1353 Double_t radLength, rho, x, dx, y, ymax = 0, z;
5443e65e 1354 Bool_t lookForCluster;
a819a5f7 1355
5443e65e 1356 Int_t expectedNumberOfClusters = 0;
1357 x = t.GetX();
46d29e70 1358
5443e65e 1359 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
46d29e70 1360
029cd327 1361 Int_t nRefPlane = fgkFirstPlane;
9c9d2487 1362 Bool_t isNewLayer = kFALSE;
46d29e70 1363
9c9d2487 1364 Double_t chi2;
1365 Double_t minDY;
3c625a9b 1366 Int_t zone =-10;
1367 Int_t nr;
1368 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
9c9d2487 1369
1370 y = t.GetY();
1371 z = t.GetZ();
46d29e70 1372
5443e65e 1373 // first propagate to the outer surface of the current time bin
46d29e70 1374
9c9d2487 1375 s = t.GetSector();
029cd327 1376 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1377 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2;
1378 y = t.GetY();
1379 z = t.GetZ();
46d29e70 1380
029cd327 1381 if(!t.PropagateTo(x,radLength,rho)) break;
3c625a9b 1382 // if (!AdjustSector(&t)) break;
1383 //
1384 // MI -fix untill correct material desription will be implemented
1385 //
1386 Float_t angle = t.GetAlpha(); // MI - if rotation - we go through the material -
9c9d2487 1387 if (!AdjustSector(&t)) break;
3c625a9b 1388 if (TMath::Abs(angle - t.GetAlpha())>0.000001) break; //better to stop track
1389 Int_t currentzone = fTrSec[s]->GetLayer(nr)->GetZone(z);
1390 if (currentzone==-10) break; // we are in the frame
1391 if (currentzone>-10){ // layer knows where we are
1392 if (zone==-10) zone = currentzone;
1393 if (zone!=currentzone) break;
1394 }
1395 //
1396 //
9c9d2487 1397 s = t.GetSector();
029cd327 1398 if (!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1399
5443e65e 1400 y = t.GetY();
9c9d2487 1401 z = t.GetZ();
a819a5f7 1402
9c9d2487 1403 // Barrel Tracks [SR, 04.04.2003]
46d29e70 1404
9c9d2487 1405 s = t.GetSector();
1406 if (fTrSec[s]->GetLayer(nr)->IsSensitive() !=
1407 fTrSec[s]->GetLayer(nr+1)->IsSensitive() ) {
46d29e70 1408
c630aafd 1409// if (IsStoringBarrel()) StoreBarrelTrack(&t, nRefPlane++, kTrackBack);
9c9d2487 1410 }
46d29e70 1411
9c9d2487 1412 if (fTrSec[s]->GetLayer(nr-1)->IsSensitive() &&
1413 ! fTrSec[s]->GetLayer(nr)->IsSensitive()) {
1414 isNewLayer = kTRUE;
1415 } else {isNewLayer = kFALSE;}
46d29e70 1416
5443e65e 1417 y = t.GetY();
9c9d2487 1418 z = t.GetZ();
a819a5f7 1419
9c9d2487 1420 // now propagate to the middle plane of the next time bin
029cd327 1421 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1422
9c9d2487 1423 x = fTrSec[s]->GetLayer(nr+1)->GetX();
029cd327 1424 if(!t.PropagateTo(x,radLength,rho)) break;
9c9d2487 1425 if (!AdjustSector(&t)) break;
1426 s = t.GetSector();
029cd327 1427 if(!t.PropagateTo(x,radLength,rho)) break;
46d29e70 1428
9c9d2487 1429 y = t.GetY();
1430 z = t.GetZ();
1431
1432 if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
5443e65e 1433 // printf("label %d, pl %d, lookForCluster %d \n",
a9814c09 1434 // trackIndex, nr+1, lookForCluster);
5443e65e 1435
1436 if(lookForCluster) {
1437 expectedNumberOfClusters++;
1438
1439 wIndex = (Float_t) t.GetLabel();
1440 wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
1441
029cd327 1442 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
5443e65e 1443 Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
1444 Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
1445 if((t.GetSigmaY2() + sy2) < 0) break;
1446 Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
1447 Double_t y=t.GetY(), z=t.GetZ();
1448
1449 wYrt = (Float_t) y;
1450 wZrt = (Float_t) z;
1451 wYwindow = (Float_t) road;
029cd327 1452 t.GetPxPyPz(px,py,pz);
1453 wPx = (Float_t) px;
1454 wPy = (Float_t) py;
1455 wPz = (Float_t) pz;
5443e65e 1456 wC = (Float_t) t.GetC();
1457 wSigmaC2 = (Float_t) t.GetSigmaC2();
1458 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1459 wSigmaY2 = (Float_t) t.GetSigmaY2();
1460 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1461 wChi2 = -1;
1462
029cd327 1463 if (road>fgkWideRoad) {
a9814c09 1464 if (t.GetNumberOfClusters()>4)
1465 cerr<<t.GetNumberOfClusters()
1466 <<"FindProlongation warning: Too broad road !\n";
1467 return 0;
5443e65e 1468 }
1469
1470 AliTRDcluster *cl=0;
1471 UInt_t index=0;
1472
029cd327 1473 Double_t maxChi2=fgkMaxChi2;
5443e65e 1474
9c9d2487 1475 if (isNewLayer) {
1476 road = 3 * road;
1477 //sz2 = 3 * sz2;
029cd327 1478 maxChi2 = 10 * fgkMaxChi2;
9c9d2487 1479 }
1480
029cd327 1481 if (nRefPlane == fgkFirstPlane) maxChi2 = 20 * fgkMaxChi2;
1482 if (nRefPlane == fgkFirstPlane+2) maxChi2 = 15 * fgkMaxChi2;
1483 if (t.GetNRotate() > 0) maxChi2 = 3 * maxChi2;
9c9d2487 1484
1485
5443e65e 1486 wYclosest = 12345678;
1487 wYcorrect = 12345678;
1488 wZclosest = 12345678;
1489 wZcorrect = 12345678;
1490 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1491
1492 // Find the closest correct cluster for debugging purposes
029cd327 1493 if (timeBin) {
9c9d2487 1494 minDY = 1000000;
029cd327 1495 for (Int_t i=0; i<timeBin; i++) {
1496 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1497 if((c->GetLabel(0) != trackIndex) &&
1498 (c->GetLabel(1) != trackIndex) &&
1499 (c->GetLabel(2) != trackIndex)) continue;
1500 if(TMath::Abs(c->GetY() - y) > minDY) continue;
9c9d2487 1501 //minDY = TMath::Abs(c->GetY() - y);
1502 minDY = c->GetY() - y;
a9814c09 1503 wYcorrect = c->GetY();
1504 wZcorrect = c->GetZ();
1505
1506 Double_t h01 = GetTiltFactor(c);
1507 wChi2 = t.GetPredictedChi2(c, h01);
1508 }
5443e65e 1509 }
46d29e70 1510
5443e65e 1511 // Now go for the real cluster search
46d29e70 1512
029cd327 1513 if (timeBin) {
5443e65e 1514
029cd327 1515 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1516 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1517 if (c->GetY() > y+road) break;
9c9d2487 1518 if (c->IsUsed() > 0) continue;
a9814c09 1519 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1520
1521 Double_t h01 = GetTiltFactor(c);
9c9d2487 1522 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1523
029cd327 1524 if (chi2 > maxChi2) continue;
1525 maxChi2=chi2;
a9814c09 1526 cl=c;
029cd327 1527 index=timeBin.GetIndex(i);
9c9d2487 1528
1529 //check is correct
1530 if((c->GetLabel(0) != trackIndex) &&
1531 (c->GetLabel(1) != trackIndex) &&
1532 (c->GetLabel(2) != trackIndex)) t.AddNWrong();
a9814c09 1533 }
5443e65e 1534
a9814c09 1535 if(!cl) {
1536
029cd327 1537 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1538 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
a9814c09 1539
1540 if (c->GetY() > y+road) break;
9c9d2487 1541 if (c->IsUsed() > 0) continue;
a9814c09 1542 if((c->GetZ()-z)*(c->GetZ()-z) > 2.25 * 12 * sz2) continue;
1543
1544 Double_t h01 = GetTiltFactor(c);
9c9d2487 1545 chi2=t.GetPredictedChi2(c,h01);
a9814c09 1546
029cd327 1547 if (chi2 > maxChi2) continue;
1548 maxChi2=chi2;
a9814c09 1549 cl=c;
029cd327 1550 index=timeBin.GetIndex(i);
a9814c09 1551 }
1552 }
1553
1554 if (cl) {
1555 wYclosest = cl->GetY();
1556 wZclosest = cl->GetZ();
1557
1558 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1559 Double_t h01 = GetTiltFactor(cl);
3c625a9b 1560 Int_t det = cl->GetDetector();
1561 Int_t plane = fGeom->GetPlane(det);
1562
1563 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1564 //if(!t.Update(cl,maxChi2,index,h01)) {
029cd327 1565 if(!tryAgain--) return 0;
a9814c09 1566 }
029cd327 1567 else tryAgain=fMaxGap;
a9814c09 1568 }
1569 else {
029cd327 1570 if (tryAgain==0) break;
1571 tryAgain--;
9c9d2487 1572
1573 //if (minDY < 1000000 && isNewLayer)
1574 //cout << "\t" << nRefPlane << "\t" << "\t" << t.GetNRotate() << "\t" <<
029cd327 1575 // road << "\t" << minDY << "\t" << chi2 << "\t" << wChi2 << "\t" << maxChi2 << endl;
9c9d2487 1576
a9814c09 1577 }
1578
9c9d2487 1579 isNewLayer = kFALSE;
1580
a9814c09 1581 /*
1582 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1583
1584 printf(" %f", wIndex); //1
1585 printf(" %f", wTB); //2
1586 printf(" %f", wYrt); //3
1587 printf(" %f", wYclosest); //4
1588 printf(" %f", wYcorrect); //5
1589 printf(" %f", wYwindow); //6
1590 printf(" %f", wZrt); //7
1591 printf(" %f", wZclosest); //8
1592 printf(" %f", wZcorrect); //9
1593 printf(" %f", wZwindow); //10
1594 printf(" %f", wPx); //11
1595 printf(" %f", wPy); //12
1596 printf(" %f", wPz); //13
1597 printf(" %f", wSigmaC2*1000000); //14
1598 printf(" %f", wSigmaTgl2*1000); //15
1599 printf(" %f", wSigmaY2); //16
1600 // printf(" %f", wSigmaZ2); //17
1601 printf(" %f", wChi2); //17
1602 printf(" %f", wC); //18
1603 printf("\n");
1604 }
1605 */
5443e65e 1606 }
1607 }
1608 }
3c625a9b 1609 if (nr<outerTB)
1610 t.SetStop(kTRUE);
1611 else
1612 t.SetStop(kFALSE);
5443e65e 1613 return expectedNumberOfClusters;
9c9d2487 1614
1615
5443e65e 1616}
1617
1e9bb598 1618//---------------------------------------------------------------------------
1619Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
1620{
1621 // Starting from current position on track=t this function tries
1622 // to extrapolate the track up to timeBin=0 and to reuse already
1623 // assigned clusters. Returns the number of clusters
1624 // expected to be found in sensitive layers
1625 // get indices of assigned clusters for each layer
1626 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1627
1628 Int_t iCluster[90];
1629 for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
1630 for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
1631 Int_t index = t.GetClusterIndex(i);
1632 AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
1633 if (!cl) continue;
1634 Int_t detector=cl->GetDetector();
1635 Int_t localTimeBin=cl->GetLocalTimeBin();
1636 Int_t sector=fGeom->GetSector(detector);
1637 Int_t plane=fGeom->GetPlane(detector);
1638
1639 Int_t trackingSector = CookSectorIndex(sector);
1640
1641 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1642 if(gtb < 0) continue;
1643 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1644 iCluster[layer] = index;
1645 }
1646 t.ResetClusters();
1647
1648 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1649
1650 Double_t alpha=t.GetAlpha();
1651 alpha = TVector2::Phi_0_2pi(alpha);
1652
1653 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1654 Double_t radLength, rho, x, dx, y, ymax, z;
1655
1656 Int_t expectedNumberOfClusters = 0;
1657 Bool_t lookForCluster;
1658
1659 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1660
1661
1662 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1663
1664 y = t.GetY(); z = t.GetZ();
1665
1666 // first propagate to the inner surface of the current time bin
1667 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1668 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1669 if(!t.PropagateTo(x,radLength,rho)) break;
1670 y = t.GetY();
1671 ymax = x*TMath::Tan(0.5*alpha);
1672 if (y > ymax) {
1673 s = (s+1) % ns;
1674 if (!t.Rotate(alpha)) break;
1675 if(!t.PropagateTo(x,radLength,rho)) break;
1676 } else if (y <-ymax) {
1677 s = (s-1+ns) % ns;
1678 if (!t.Rotate(-alpha)) break;
1679 if(!t.PropagateTo(x,radLength,rho)) break;
1680 }
1681
1682 y = t.GetY(); z = t.GetZ();
1683
1684 // now propagate to the middle plane of the next time bin
1685 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1686 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1687 if(!t.PropagateTo(x,radLength,rho)) break;
1688 y = t.GetY();
1689 ymax = x*TMath::Tan(0.5*alpha);
1690 if (y > ymax) {
1691 s = (s+1) % ns;
1692 if (!t.Rotate(alpha)) break;
1693 if(!t.PropagateTo(x,radLength,rho)) break;
1694 } else if (y <-ymax) {
1695 s = (s-1+ns) % ns;
1696 if (!t.Rotate(-alpha)) break;
1697 if(!t.PropagateTo(x,radLength,rho)) break;
1698 }
1699
1700 if(lookForCluster) expectedNumberOfClusters++;
1701
1702 // use assigned cluster
1703 if (!iCluster[nr-1]) continue;
1704 AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
1705 Double_t h01 = GetTiltFactor(cl);
1706 Double_t chi2=t.GetPredictedChi2(cl, h01);
1707 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1708 t.Update(cl,chi2,iCluster[nr-1],h01);
1709 }
1710
1711 return expectedNumberOfClusters;
1712}
1713
5443e65e 1714//___________________________________________________________________
1715
1716Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
1717{
1718 // Starting from current radial position of track <t> this function
1719 // extrapolates the track up to radial position <xToGo>.
1720 // Returns 1 if track reaches the plane, and 0 otherwise
1721
1722 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1723
1724 Double_t alpha=t.GetAlpha();
1725
1726 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1727 if (alpha < 0. ) alpha += 2.*TMath::Pi();
1728
1729 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1730
1731 Bool_t lookForCluster;
029cd327 1732 Double_t radLength, rho, x, dx, y, ymax, z;
5443e65e 1733
1734 x = t.GetX();
1735
1736 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1737
1738 Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
1739
1740 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
1741
1742 y = t.GetY(); z = t.GetZ();
1743
1744 // first propagate to the outer surface of the current time bin
029cd327 1745 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1746 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
029cd327 1747 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1748 y = t.GetY();
1749 ymax = x*TMath::Tan(0.5*alpha);
1750 if (y > ymax) {
1751 s = (s+1) % ns;
1752 if (!t.Rotate(alpha)) return 0;
1753 } else if (y <-ymax) {
1754 s = (s-1+ns) % ns;
1755 if (!t.Rotate(-alpha)) return 0;
1756 }
029cd327 1757 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1758
1759 y = t.GetY(); z = t.GetZ();
1760
1761 // now propagate to the middle plane of the next time bin
029cd327 1762 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
5443e65e 1763 x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
029cd327 1764 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1765 y = t.GetY();
1766 ymax = x*TMath::Tan(0.5*alpha);
1767 if (y > ymax) {
1768 s = (s+1) % ns;
1769 if (!t.Rotate(alpha)) return 0;
1770 } else if (y <-ymax) {
1771 s = (s-1+ns) % ns;
1772 if (!t.Rotate(-alpha)) return 0;
1773 }
029cd327 1774 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1775 }
1776 return 1;
1777}
1778
1779//___________________________________________________________________
1780
1781Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
1782{
1783 // Starting from current radial position of track <t> this function
1784 // extrapolates the track up to radial position of the outermost
1785 // padrow of the TPC.
1786 // Returns 1 if track reaches the TPC, and 0 otherwise
1787
c630aafd 1788 //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
5443e65e 1789
1790 Double_t alpha=t.GetAlpha();
c630aafd 1791 alpha = TVector2::Phi_0_2pi(alpha);
5443e65e 1792
1793 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1794
1795 Bool_t lookForCluster;
029cd327 1796 Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
5443e65e 1797
1798 x = t.GetX();
1799
1800 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
5443e65e 1801 Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
1802
1803 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
1804
9c9d2487 1805 y = t.GetY();
1806 z = t.GetZ();
5443e65e 1807
1808 // first propagate to the outer surface of the current time bin
029cd327 1809 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1810 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
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
9c9d2487 1816 y = t.GetY();
1817 z = t.GetZ();
5443e65e 1818
1819 // now propagate to the middle plane of the next time bin
029cd327 1820 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
9c9d2487 1821 x = fTrSec[s]->GetLayer(nr-1)->GetX();
1822
029cd327 1823 if(!t.PropagateTo(x,radLength,rho)) return 0;
9c9d2487 1824 AdjustSector(&t);
029cd327 1825 if(!t.PropagateTo(x,radLength,rho)) return 0;
5443e65e 1826 }
1827 return 1;
1828}
1829
5443e65e 1830void AliTRDtracker::LoadEvent()
1831{
1832 // Fills clusters into TRD tracking_sectors
1833 // Note that the numbering scheme for the TRD tracking_sectors
1834 // differs from that of TRD sectors
1835
1836 ReadClusters(fClusters);
1837 Int_t ncl=fClusters->GetEntriesFast();
19dd5b2f 1838 cout<<"LoadSectors: sorting "<<ncl<<" clusters"<<endl;
5443e65e 1839
1840 UInt_t index;
1841 while (ncl--) {
e24ea474 1842// printf("\r %d left ",ncl);
5443e65e 1843 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1844 Int_t detector=c->GetDetector();
1845 Int_t localTimeBin=c->GetLocalTimeBin();
5443e65e 1846 Int_t sector=fGeom->GetSector(detector);
1847 Int_t plane=fGeom->GetPlane(detector);
1848
029cd327 1849 Int_t trackingSector = CookSectorIndex(sector);
5443e65e 1850
029cd327 1851 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
b3a5a838 1852 if(gtb < 0) continue;
029cd327 1853 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
5443e65e 1854
1855 index=ncl;
029cd327 1856 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
5443e65e 1857 }
19dd5b2f 1858 // printf("\r\n");
5443e65e 1859
1860}
1861
c630aafd 1862//_____________________________________________________________________________
1863Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1864{
1865 // Fills clusters into TRD tracking_sectors
1866 // Note that the numbering scheme for the TRD tracking_sectors
1867 // differs from that of TRD sectors
1868
1869 if (ReadClusters(fClusters,cTree)) {
1870 Error("LoadClusters","Problem with reading the clusters !");
1871 return 1;
1872 }
1873 Int_t ncl=fClusters->GetEntriesFast();
1874 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1875
1876 UInt_t index;
3c625a9b 1877 for (Int_t ichamber=0;ichamber<5;ichamber++)
1878 for (Int_t isector=0;isector<18;isector++){
1879 fHoles[ichamber][isector]=kTRUE;
1880 }
1881
1882
c630aafd 1883 while (ncl--) {
1884// printf("\r %d left ",ncl);
1885 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
029cd327 1886 Int_t detector=c->GetDetector();
1887 Int_t localTimeBin=c->GetLocalTimeBin();
c630aafd 1888 Int_t sector=fGeom->GetSector(detector);
1889 Int_t plane=fGeom->GetPlane(detector);
3c625a9b 1890
029cd327 1891 Int_t trackingSector = CookSectorIndex(sector);
3c625a9b 1892 if (c->GetLabel(0)>0){
1893 Int_t chamber = fGeom->GetChamber(detector);
1894 fHoles[chamber][trackingSector]=kFALSE;
1895 }
c630aafd 1896
029cd327 1897 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
c630aafd 1898 if(gtb < 0) continue;
029cd327 1899 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
c630aafd 1900
1901 index=ncl;
029cd327 1902 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
c630aafd 1903 }
7bed16a7 1904 // printf("\r\n");
3c625a9b 1905 //
1906 //
1907 /*
1908 for (Int_t isector=0;isector<18;isector++){
1909 for (Int_t ichamber=0;ichamber<5;ichamber++)
1910 if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
1911 printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
1912 fGeom->IsHole(0,ichamber,17-isector));
1913 }
1914 */
c630aafd 1915 return 0;
1916}
1917
5443e65e 1918//_____________________________________________________________________________
1919void AliTRDtracker::UnloadEvent()
1920{
1921 //
1922 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1923 //
1924
1925 Int_t i, nentr;
1926
1927 nentr = fClusters->GetEntriesFast();
1928 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1929
1930 nentr = fSeeds->GetEntriesFast();
1931 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1932
1933 nentr = fTracks->GetEntriesFast();
1934 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1935
1936 Int_t nsec = AliTRDgeometry::kNsect;
1937
1938 for (i = 0; i < nsec; i++) {
1939 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1940 fTrSec[i]->GetLayer(pl)->Clear();
1941 }
1942 }
1943
1944}
1945
1946//__________________________________________________________________________
1947void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
1948{
1949 // Creates track seeds using clusters in timeBins=i1,i2
1950
1951 if(turn > 2) {
1952 cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
1953 return;
1954 }
1955
1956 Double_t x[5], c[15];
029cd327 1957 Int_t maxSec=AliTRDgeometry::kNsect;
5443e65e 1958
1959 Double_t alpha=AliTRDgeometry::GetAlpha();
1960 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
1961 Double_t cs=cos(alpha), sn=sin(alpha);
1962 Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
1963
1964
1965 Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
1966 Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
1967
1968 Double_t x1 =fTrSec[0]->GetX(i1);
1969 Double_t xx2=fTrSec[0]->GetX(i2);
1970
029cd327 1971 for (Int_t ns=0; ns<maxSec; ns++) {
5443e65e 1972
029cd327 1973 Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1974 Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
5443e65e 1975 Int_t nm=(*fTrSec[ns]->GetLayer(i2));
029cd327 1976 Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1977 Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
5443e65e 1978
1979 AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
1980
1981 for (Int_t is=0; is < r1; is++) {
1982 Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
1983
1984 for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
a9814c09 1985
1986 const AliTRDcluster *cl;
1987 Double_t x2, y2, z2;
1988 Double_t x3=0., y3=0.;
1989
1990 if (js<nl2) {
1991 if(turn != 2) continue;
029cd327 1992 AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
a9814c09 1993 cl=r2[js];
1994 y2=cl->GetY(); z2=cl->GetZ();
1995
1996 x2= xx2*cs2+y2*sn2;
1997 y2=-xx2*sn2+y2*cs2;
1998 }
1999 else if (js<nl2+nl) {
2000 if(turn != 1) continue;
029cd327 2001 AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
a9814c09 2002 cl=r2[js-nl2];
2003 y2=cl->GetY(); z2=cl->GetZ();
2004
2005 x2= xx2*cs+y2*sn;
2006 y2=-xx2*sn+y2*cs;
2007 }
2008 else if (js<nl2+nl+nm) {
2009 if(turn != 1) continue;
2010 AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
2011 cl=r2[js-nl2-nl];
2012 x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
2013 }
2014 else if (js<nl2+nl+nm+nu) {
2015 if(turn != 1) continue;
029cd327 2016 AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
a9814c09 2017 cl=r2[js-nl2-nl-nm];
2018 y2=cl->GetY(); z2=cl->GetZ();
2019
2020 x2=xx2*cs-y2*sn;
2021 y2=xx2*sn+y2*cs;
2022 }
2023 else {
2024 if(turn != 2) continue;
029cd327 2025 AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
a9814c09 2026 cl=r2[js-nl2-nl-nm-nu];
2027 y2=cl->GetY(); z2=cl->GetZ();
2028
2029 x2=xx2*cs2-y2*sn2;
2030 y2=xx2*sn2+y2*cs2;
2031 }
2032
029cd327 2033 if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
a9814c09 2034
2035 Double_t zz=z1 - z1/x1*(x1-x2);
2036
029cd327 2037 if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
a9814c09 2038
2039 Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
2040 if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
2041
2042 x[0]=y1;
2043 x[1]=z1;
2044 x[4]=f1trd(x1,y1,x2,y2,x3,y3);
2045
029cd327 2046 if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
a9814c09 2047
2048 x[2]=f2trd(x1,y1,x2,y2,x3,y3);
2049
2050 if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
2051
2052 x[3]=f3trd(x1,y1,x2,y2,z1,z2);
2053
029cd327 2054 if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
a9814c09 2055
2056 Double_t a=asin(x[2]);
2057 Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
2058
029cd327 2059 if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
a9814c09 2060
2061 Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
2062 Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
029cd327 2063 Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
a9814c09 2064
2065 // Tilt changes
2066 Double_t h01 = GetTiltFactor(r1[is]);
029cd327 2067 Double_t xuFactor = 100.;
b8dc2353 2068 if(fNoTilt) {
2069 h01 = 0;
029cd327 2070 xuFactor = 1;
b8dc2353 2071 }
2072
fd621f36 2073 sy1=sy1+sz1*h01*h01;
b3a5a838 2074 Double_t syz=sz1*(-h01);
a9814c09 2075 // end of tilt changes
2076
b3a5a838 2077 Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
2078 Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
2079 Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
2080 Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
2081 Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
2082 Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
2083 Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
2084 Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
2085 Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
2086 Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
2087
a9814c09 2088
b3a5a838 2089 c[0]=sy1;
a9814c09 2090 // c[1]=0.; c[2]=sz1;
029cd327 2091 c[1]=syz; c[2]=sz1*xuFactor;
b3a5a838 2092 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
2093 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
2094 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
2095 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
2096 c[13]=f30*sy1*f40+f32*sy2*f42;
2097 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
a9814c09 2098
2099 UInt_t index=r1.GetIndex(is);
2100
2101 AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
2102
2103 Int_t rc=FollowProlongation(*track, i2);
2104
2105 if ((rc < 1) ||
2106 (track->GetNumberOfClusters() <
029cd327 2107 (outer-inner)*fgkMinClustersInSeed)) delete track;
a9814c09 2108 else {
2109 fSeeds->AddLast(track); fNseeds++;
e24ea474 2110// cerr<<"\r found seed "<<fNseeds;
a9814c09 2111 }
5443e65e 2112 }
2113 }
2114 }
2115}
2116
2117//_____________________________________________________________________________
c630aafd 2118Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree)
5443e65e 2119{
2120 //
a819a5f7 2121 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2122 // from the file. The names of the cluster tree and branches
2123 // should match the ones used in AliTRDclusterizer::WriteClusters()
2124 //
029cd327 2125 TObjArray *clusterArray = new TObjArray(400);
5443e65e 2126
c630aafd 2127 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2128 if (!branch) {
2129 Error("ReadClusters","Can't get the branch !");
2130 return 1;
2131 }
029cd327 2132 branch->SetAddress(&clusterArray);
5443e65e 2133
2134 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
19dd5b2f 2135 // printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
a819a5f7 2136
a819a5f7 2137 // Loop through all entries in the tree
eb187bed 2138 Int_t nbytes = 0;
a819a5f7 2139 AliTRDcluster *c = 0;
7bed16a7 2140 // printf("\n");
a819a5f7 2141
2142 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2143
2144 // Import the tree
5443e65e 2145 nbytes += ClusterTree->GetEvent(iEntry);
2146
a819a5f7 2147 // Get the number of points in the detector
029cd327 2148 Int_t nCluster = clusterArray->GetEntriesFast();
e24ea474 2149// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 2150
a819a5f7 2151 // Loop through all TRD digits
2152 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2153 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
a819a5f7 2154 AliTRDcluster *co = new AliTRDcluster(*c);
2155 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
5443e65e 2156 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 2157 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2158 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
a819a5f7 2159 array->AddLast(co);
029cd327 2160 delete clusterArray->RemoveAt(iCluster);
a819a5f7 2161 }
2162 }
2163
029cd327 2164 delete clusterArray;
5443e65e 2165
c630aafd 2166 return 0;
a819a5f7 2167}
2168
5443e65e 2169//______________________________________________________________________
2170void AliTRDtracker::ReadClusters(TObjArray *array, const Char_t *filename)
a819a5f7 2171{
2172 //
5443e65e 2173 // Reads AliTRDclusters from file <filename>. The names of the cluster
2174 // tree and branches should match the ones used in
2175 // AliTRDclusterizer::WriteClusters()
2176 // if <array> == 0, clusters are added into AliTRDtracker fCluster array
a819a5f7 2177 //
2178
5443e65e 2179 TDirectory *savedir=gDirectory;
46d29e70 2180
5443e65e 2181 TFile *file = TFile::Open(filename);
2182 if (!file->IsOpen()) {
2183 cerr<<"Can't open file with TRD clusters"<<endl;
2184 return;
2185 }
46d29e70 2186
5443e65e 2187 Char_t treeName[12];
e24ea474 2188 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
029cd327 2189 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
46d29e70 2190
029cd327 2191 if (!clusterTree) {
5443e65e 2192 cerr<<"AliTRDtracker::ReadClusters(): ";
2193 cerr<<"can't get a tree with clusters !\n";
2194 return;
2195 }
46d29e70 2196
029cd327 2197 TObjArray *clusterArray = new TObjArray(400);
46d29e70 2198
029cd327 2199 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
46d29e70 2200
029cd327 2201 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2202 cout<<"found "<<nEntries<<" in clusterTree"<<endl;
a819a5f7 2203
5443e65e 2204 // Loop through all entries in the tree
eb187bed 2205 Int_t nbytes = 0;
5443e65e 2206 AliTRDcluster *c = 0;
bbf92647 2207
7bed16a7 2208 // printf("\n");
bbf92647 2209
5443e65e 2210 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
46d29e70 2211
5443e65e 2212 // Import the tree
029cd327 2213 nbytes += clusterTree->GetEvent(iEntry);
0a29d0f1 2214
5443e65e 2215 // Get the number of points in the detector
029cd327 2216 Int_t nCluster = clusterArray->GetEntriesFast();
7bed16a7 2217 // printf("\n Read %d clusters from entry %d", nCluster, iEntry);
5443e65e 2218
2219 // Loop through all TRD digits
2220 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2221 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
5443e65e 2222 AliTRDcluster *co = new AliTRDcluster(*c);
2223 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2224 Int_t ltb = co->GetLocalTimeBin();
b8dc2353 2225 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2226 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
5443e65e 2227 array->AddLast(co);
029cd327 2228 delete clusterArray->RemoveAt(iCluster);
5443e65e 2229 }
46d29e70 2230 }
0a29d0f1 2231
5443e65e 2232 file->Close();
029cd327 2233 delete clusterArray;
5443e65e 2234 savedir->cd();
2235
2236}
2237
c630aafd 2238void AliTRDtracker::ReadClusters(TObjArray *array, const TFile *inp)
2239{
2240 //
2241 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2242 // from the file. The names of the cluster tree and branches
2243 // should match the ones used in AliTRDclusterizer::WriteClusters()
2244 //
2245
2246 TDirectory *savedir=gDirectory;
2247
2248 if (inp) {
2249 TFile *in=(TFile*)inp;
2250 if (!in->IsOpen()) {
2251 cerr<<"AliTRDtracker::ReadClusters(): input file is not open !\n";
2252 return;
2253 }
2254 else{
2255 in->cd();
2256 }
2257 }
2258
2259 Char_t treeName[12];
2260 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
029cd327 2261 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
c630aafd 2262
029cd327 2263 TObjArray *clusterArray = new TObjArray(400);
c630aafd 2264
029cd327 2265 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
c630aafd 2266
029cd327 2267 Int_t nEntries = (Int_t) clusterTree->GetEntries();
7bed16a7 2268 // printf("found %d entries in %s.\n",nEntries,clusterTree->GetName());
c630aafd 2269
2270 // Loop through all entries in the tree
eb187bed 2271 Int_t nbytes = 0;
c630aafd 2272 AliTRDcluster *c = 0;
7bed16a7 2273 // printf("\n");
c630aafd 2274
2275 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2276
2277 // Import the tree
029cd327 2278 nbytes += clusterTree->GetEvent(iEntry);
c630aafd 2279
2280 // Get the number of points in the detector
029cd327 2281 Int_t nCluster = clusterArray->GetEntriesFast();
c630aafd 2282// printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2283
2284 // Loop through all TRD digits
2285 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
029cd327 2286 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
c630aafd 2287 AliTRDcluster *co = new AliTRDcluster(*c);
2288 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2289 Int_t ltb = co->GetLocalTimeBin();
2290 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2291 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
2292 array->AddLast(co);
029cd327 2293 delete clusterArray->RemoveAt(iCluster);
c630aafd 2294 }
2295 }
2296
029cd327 2297 delete clusterArray;
c630aafd 2298 savedir->cd();
2299
2300}
46d29e70 2301
2302//__________________________________________________________________
029cd327 2303void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2304{
2305 //
2306 // This cooks a label. Mmmmh, smells good...
2307 //
46d29e70 2308
2309 Int_t label=123456789, index, i, j;
5443e65e 2310 Int_t ncl=pt->GetNumberOfClusters();
029cd327 2311 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
5443e65e 2312
029cd327 2313 Bool_t labelAdded;
46d29e70 2314
029cd327 2315 // Int_t s[kRange][2];
2316 Int_t **s = new Int_t* [kRange];
2317 for (i=0; i<kRange; i++) {
d1b06c24 2318 s[i] = new Int_t[2];
2319 }
029cd327 2320 for (i=0; i<kRange; i++) {
46d29e70 2321 s[i][0]=-1;
2322 s[i][1]=0;
2323 }
2324
2325 Int_t t0,t1,t2;
2326 for (i=0; i<ncl; i++) {
5443e65e 2327 index=pt->GetClusterIndex(i);
46d29e70 2328 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
5443e65e 2329 t0=c->GetLabel(0);
2330 t1=c->GetLabel(1);
2331 t2=c->GetLabel(2);
46d29e70 2332 }
2333
2334 for (i=0; i<ncl; i++) {
5443e65e 2335 index=pt->GetClusterIndex(i);
46d29e70 2336 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2337 for (Int_t k=0; k<3; k++) {
5443e65e 2338 label=c->GetLabel(k);
029cd327 2339 labelAdded=kFALSE; j=0;
46d29e70 2340 if (label >= 0) {
029cd327 2341 while ( (!labelAdded) && ( j < kRange ) ) {
a9814c09 2342 if (s[j][0]==label || s[j][1]==0) {
2343 s[j][0]=label;
2344 s[j][1]=s[j][1]+1;
029cd327 2345 labelAdded=kTRUE;
a9814c09 2346 }
2347 j++;
2348 }
46d29e70 2349 }
2350 }
2351 }
2352
46d29e70 2353 Int_t max=0;
2354 label = -123456789;
2355
029cd327 2356 for (i=0; i<kRange; i++) {
46d29e70 2357 if (s[i][1]>max) {
2358 max=s[i][1]; label=s[i][0];
2359 }
2360 }
5443e65e 2361
029cd327 2362 for (i=0; i<kRange; i++) {
5443e65e 2363 delete []s[i];
2364 }
2365
d1b06c24 2366 delete []s;
5443e65e 2367
2368 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
2369
2370 pt->SetLabel(label);
2371
46d29e70 2372}
2373
c630aafd 2374
5443e65e 2375//__________________________________________________________________
029cd327 2376void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2377{
2378 //
2379 // Use clusters, but don't abuse them!
2380 //
2381
5443e65e 2382 Int_t ncl=t->GetNumberOfClusters();
2383 for (Int_t i=from; i<ncl; i++) {
2384 Int_t index = t->GetClusterIndex(i);
2385 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2386 c->Use();
2387 }
2388}
2389
2390
2391//_____________________________________________________________________
029cd327 2392Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
5443e65e 2393{
2394 // Parametrised "expected" error of the cluster reconstruction in Y
2395
2396 Double_t s = 0.08 * 0.08;
2397 return s;
2398}
2399
2400//_____________________________________________________________________
029cd327 2401Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
0a29d0f1 2402{
5443e65e 2403 // Parametrised "expected" error of the cluster reconstruction in Z
2404
a9814c09 2405 Double_t s = 9 * 9 /12.;
5443e65e 2406 return s;
2407}
2408
5443e65e 2409//_____________________________________________________________________
029cd327 2410Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
5443e65e 2411{
2412 //
029cd327 2413 // Returns radial position which corresponds to time bin <localTB>
5443e65e 2414 // in tracking sector <sector> and plane <plane>
2415 //
2416
029cd327 2417 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
5443e65e 2418 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2419 return fTrSec[sector]->GetLayer(pl)->GetX();
2420
2421}
2422
c630aafd 2423
5443e65e 2424//_______________________________________________________
2425AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
029cd327 2426 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
5443e65e 2427{
0a29d0f1 2428 //
5443e65e 2429 // AliTRDpropagationLayer constructor
0a29d0f1 2430 //
46d29e70 2431
029cd327 2432 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
2433 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
5443e65e 2434
46d29e70 2435
029cd327 2436 for(Int_t i=0; i < (Int_t) kZones; i++) {
5443e65e 2437 fZc[i]=0; fZmax[i] = 0;
a819a5f7 2438 }
5443e65e 2439
2440 fYmax = 0;
2441
2442 if(fTimeBinIndex >= 0) {
029cd327 2443 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2444 fIndex = new UInt_t[kMaxClusterPerTimeBin];
a819a5f7 2445 }
46d29e70 2446
3c625a9b 2447 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
5443e65e 2448 fHole = kFALSE;
2449 fHoleZc = 0;
2450 fHoleZmax = 0;
2451 fHoleYc = 0;
2452 fHoleYmax = 0;
2453 fHoleRho = 0;
2454 fHoleX0 = 0;
2455
2456}
2457
2458//_______________________________________________________
2459void AliTRDtracker::AliTRDpropagationLayer::SetHole(
a9814c09 2460 Double_t Zmax, Double_t Ymax, Double_t rho,
029cd327 2461 Double_t radLength, Double_t Yc, Double_t Zc)
5443e65e 2462{
2463 //
2464 // Sets hole in the layer
2465 //
5443e65e 2466 fHole = kTRUE;
2467 fHoleZc = Zc;
2468 fHoleZmax = Zmax;
2469 fHoleYc = Yc;
2470 fHoleYmax = Ymax;
2471 fHoleRho = rho;
029cd327 2472 fHoleX0 = radLength;
5443e65e 2473}
2474
46d29e70 2475
5443e65e 2476//_______________________________________________________
2477AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
2478{
2479 //
2480 // AliTRDtrackingSector Constructor
2481 //
2482
2483 fGeom = geo;
2484 fPar = par;
2485 fGeomSector = gs;
2486 fTzeroShift = 0.13;
2487 fN = 0;
3c625a9b 2488 //
2489 // get holes description from geometry
2490 Bool_t holes[AliTRDgeometry::kNcham];
2491 //printf("sector\t%d\t",gs);
2492 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
2493 holes[icham] = fGeom->IsHole(0,icham,gs);
2494 //printf("%d",holes[icham]);
2495 }
2496 //printf("\n");
2497
029cd327 2498 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
5443e65e 2499
2500
2501 AliTRDpropagationLayer* ppl;
2502
029cd327 2503 Double_t x, xin, xout, dx, rho, radLength;
5443e65e 2504 Int_t steps;
46d29e70 2505
5443e65e 2506 // set time bins in the gas of the TPC
46d29e70 2507
5443e65e 2508 xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
029cd327 2509 rho = 0.9e-3; radLength = 28.94;
5443e65e 2510
2511 for(Int_t i=0; i<steps; i++) {
2512 x = xin + i*dx + dx/2;
029cd327 2513 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2514 InsertLayer(ppl);
46d29e70 2515 }
2516
5443e65e 2517 // set time bins in the outer field cage vessel
46d29e70 2518
029cd327 2519 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2520 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2521 InsertLayer(ppl);
46d29e70 2522
029cd327 2523 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2524 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2525 InsertLayer(ppl);
2526
029cd327 2527 dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2528 steps = 5; dx = (xout - xin)/steps;
2529 for(Int_t i=0; i<steps; i++) {
2530 x = xin + i*dx + dx/2;
029cd327 2531 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2532 InsertLayer(ppl);
2533 }
2534
029cd327 2535 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2536 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2537 InsertLayer(ppl);
2538
029cd327 2539 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2540 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2541 InsertLayer(ppl);
0a29d0f1 2542
5443e65e 2543
2544 // set time bins in CO2
2545
2546 xin = xout; xout = 275.0;
2547 steps = 50; dx = (xout - xin)/steps;
029cd327 2548 rho = 1.977e-3; radLength = 36.2;
5443e65e 2549
2550 for(Int_t i=0; i<steps; i++) {
2551 x = xin + i*dx + dx/2;
029cd327 2552 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2553 InsertLayer(ppl);
2554 }
2555
2556 // set time bins in the outer containment vessel
2557
029cd327 2558 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2559 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2560 InsertLayer(ppl);
2561
029cd327 2562 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2563 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2564 InsertLayer(ppl);
2565
029cd327 2566 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2567 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2568 InsertLayer(ppl);
2569
029cd327 2570 dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
5443e65e 2571 steps = 10; dx = (xout - xin)/steps;
2572 for(Int_t i=0; i<steps; i++) {
2573 x = xin + i*dx + dx/2;
029cd327 2574 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2575 InsertLayer(ppl);
2576 }
2577
029cd327 2578 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2579 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2580 InsertLayer(ppl);
2581
029cd327 2582 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2583 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2584 InsertLayer(ppl);
2585
029cd327 2586 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2587 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
5443e65e 2588 InsertLayer(ppl);
2589
2590 Double_t xtrd = (Double_t) fGeom->Rmin();
2591
2592 // add layers between TPC and TRD (Air temporarily)
2593 xin = xout; xout = xtrd;
2594 steps = 50; dx = (xout - xin)/steps;
029cd327 2595 rho = 1.2e-3; radLength = 36.66;
5443e65e 2596
2597 for(Int_t i=0; i<steps; i++) {
2598 x = xin + i*dx + dx/2;
029cd327 2599 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2600 InsertLayer(ppl);
2601 }
2602
2603
3c625a9b 2604 // Double_t alpha=AliTRDgeometry::GetAlpha();
5443e65e 2605
2606 // add layers for each of the planes
2607
2608 Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
2609 Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
2610 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2611 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2612 Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
2613 Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
2614 Double_t dxPlane = dxTEC + dxSpace;
2615
029cd327 2616 Int_t tb, tbIndex;
2617 const Int_t kNchambers = AliTRDgeometry::Ncham();
3c625a9b 2618 Double_t ymax = 0;
2619 //, holeYmax = 0;
2620 Double_t ymaxsensitive=0;
029cd327 2621 Double_t *zc = new Double_t[kNchambers];
2622 Double_t *zmax = new Double_t[kNchambers];
3c625a9b 2623 Double_t *zmaxsensitive = new Double_t[kNchambers];
2624 // Double_t holeZmax = 1000.; // the whole sector is missing
5443e65e 2625
5443e65e 2626 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3c625a9b 2627 //
5443e65e 2628 // Radiator
2629 xin = xtrd + plane * dxPlane; xout = xin + dxRad;
029cd327 2630 steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2631 for(Int_t i=0; i<steps; i++) {
2632 x = xin + i*dx + dx/2;
3c625a9b 2633 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2634 InsertLayer(ppl);
2635 }
2636
3c625a9b 2637 ymax = fGeom->GetChamberWidth(plane)/2.;
2638 ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
2639
029cd327 2640 for(Int_t ch = 0; ch < kNchambers; ch++) {
2641 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
5443e65e 2642 Float_t pad = fPar->GetRowPadSize(plane,ch,0);
2643 Float_t row0 = fPar->GetRow0(plane,ch,0);
2644 Int_t nPads = fPar->GetRowMax(plane,ch,0);
857b3eb0 2645 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
3c625a9b 2646 // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
2647 zc[ch] = (pad * nPads)/2 + row0;
2648 //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
2649
5443e65e 2650 }
2651
2652 dx = fPar->GetTimeBinSize();
029cd327 2653 rho = 0.00295 * 0.85; radLength = 11.0;
5443e65e 2654
2655 Double_t x0 = (Double_t) fPar->GetTime0(plane);
2656 Double_t xbottom = x0 - dxDrift;
2657 Double_t xtop = x0 + dxAmp;
3c625a9b 2658 //
5443e65e 2659 // Amplification region
5443e65e 2660 steps = (Int_t) (dxAmp/dx);
2661
2662 for(tb = 0; tb < steps; tb++) {
2663 x = x0 + tb * dx + dx/2;
029cd327 2664 tbIndex = CookTimeBinIndex(plane, -tb-1);
2665 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2666 ppl->SetYmax(ymax,ymaxsensitive);
2667 ppl->SetZ(zc, zmax, zmaxsensitive);
2668 ppl->SetHoles(holes);
5443e65e 2669 InsertLayer(ppl);
2670 }
029cd327 2671 tbIndex = CookTimeBinIndex(plane, -steps);
5443e65e 2672 x = (x + dx/2 + xtop)/2;
2673 dx = 2*(xtop-x);
029cd327 2674 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2675 ppl->SetYmax(ymax,ymaxsensitive);
2676 ppl->SetZ(zc, zmax,zmaxsensitive);
2677 ppl->SetHoles(holes);
5443e65e 2678 InsertLayer(ppl);
2679
2680 // Drift region
2681 dx = fPar->GetTimeBinSize();
2682 steps = (Int_t) (dxDrift/dx);
2683
2684 for(tb = 0; tb < steps; tb++) {
2685 x = x0 - tb * dx - dx/2;
029cd327 2686 tbIndex = CookTimeBinIndex(plane, tb);
5443e65e 2687
029cd327 2688 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2689 ppl->SetYmax(ymax,ymaxsensitive);
2690 ppl->SetZ(zc, zmax, zmaxsensitive);
2691 ppl->SetHoles(holes);
5443e65e 2692 InsertLayer(ppl);
2693 }
029cd327 2694 tbIndex = CookTimeBinIndex(plane, steps);
5443e65e 2695 x = (x - dx/2 + xbottom)/2;
2696 dx = 2*(x-xbottom);
029cd327 2697 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3c625a9b 2698 ppl->SetYmax(ymax,ymaxsensitive);
2699 ppl->SetZ(zc, zmax, zmaxsensitive);
2700 ppl->SetHoles(holes);
5443e65e 2701 InsertLayer(ppl);
2702
2703 // Pad Plane
029cd327 2704 xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
2705 ppl = new AliTRDpropagationLayer(xin+dx/2,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 // Rohacell
2712 xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
029cd327 2713 steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
5443e65e 2714 for(Int_t i=0; i<steps; i++) {
2715 x = xin + i*dx + dx/2;
029cd327 2716 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3c625a9b 2717 ppl->SetYmax(ymax,ymaxsensitive);
2718 ppl->SetZ(zc, zmax,zmax);
2719 ppl->SetHoles(holes);
5443e65e 2720 InsertLayer(ppl);
2721 }
2722
2723 // Space between the chambers, air
2724 xin = xout; xout = xtrd + (plane + 1) * dxPlane;
029cd327 2725 steps = 5; 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
2733 // Space between the TRD and RICH
2734 Double_t xRICH = 500.;
2735 xin = xout; xout = xRICH;
029cd327 2736 steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
5443e65e 2737 for(Int_t i=0; i<steps; i++) {
2738 x = xin + i*dx + dx/2;
029cd327 2739 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
5443e65e 2740 InsertLayer(ppl);
2741 }
2742
2743 MapTimeBinLayers();
029cd327 2744 delete [] zc;
2745 delete [] zmax;
5443e65e 2746
2747}
2748
2749//______________________________________________________
2750
029cd327 2751Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
5443e65e 2752{
2753 //
2754 // depending on the digitization parameters calculates "global"
029cd327 2755 // time bin index for timebin <localTB> in plane <plane>
5443e65e 2756 //
2757
2758 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2759 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2760 Double_t dx = (Double_t) fPar->GetTimeBinSize();
2761
2762 Int_t tbAmp = fPar->GetTimeBefore();
2763 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
b3a5a838 2764 if(kTRUE) maxAmp = 0; // intentional until we change parameter class
5443e65e 2765 Int_t tbDrift = fPar->GetTimeMax();
2766 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
2767
029cd327 2768 Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
5443e65e 2769
029cd327 2770 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
5443e65e 2771
029cd327 2772 if((localTB < 0) &&
2773 (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
2774 if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
5443e65e 2775
2776 return gtb;
2777
2778
2779}
2780
2781//______________________________________________________
2782
2783void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2784{
2785 //
2786 // For all sensitive time bins sets corresponding layer index
2787 // in the array fTimeBins
2788 //
2789
2790 Int_t index;
2791
2792 for(Int_t i = 0; i < fN; i++) {
2793 index = fLayers[i]->GetTimeBinIndex();
2794
2795 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2796
2797 if(index < 0) continue;
029cd327 2798 if(index >= (Int_t) kMaxTimeBinIndex) {
5443e65e 2799 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2800 printf(" index %d exceeds allowed maximum of %d!\n",
029cd327 2801 index, kMaxTimeBinIndex-1);
5443e65e 2802 continue;
2803 }
2804 fTimeBinIndex[index] = i;
2805 }
2806
2807 Double_t x1, dx1, x2, dx2, gap;
2808
2809 for(Int_t i = 0; i < fN-1; i++) {
2810 x1 = fLayers[i]->GetX();
2811 dx1 = fLayers[i]->GetdX();
2812 x2 = fLayers[i+1]->GetX();
2813 dx2 = fLayers[i+1]->GetdX();
2814 gap = (x2 - dx2/2) - (x1 + dx1/2);
2815 if(gap < -0.01) {
2816 printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
2817 printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
2818 }
2819 if(gap > 0.01) {
2820 printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
2821 printf(" (%f - %f) - (%f + %f) = %f\n",
a9814c09 2822 x2, dx2/2, x1, dx1, gap);
5443e65e 2823 }
2824 }
2825}
2826
2827
2828//______________________________________________________
2829
2830
2831Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2832{
2833 //
2834 // Returns the number of time bin which in radial position is closest to <x>
2835 //
2836
2837 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2838 if(x <= fLayers[0]->GetX()) return 0;
2839
2840 Int_t b=0, e=fN-1, m=(b+e)/2;
2841 for (; b<e; m=(b+e)/2) {
2842 if (x > fLayers[m]->GetX()) b=m+1;
2843 else e=m;
2844 }
2845 if(TMath::Abs(x - fLayers[m]->GetX()) >
2846 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2847 else return m;
2848
2849}
2850
2851//______________________________________________________
2852
2853Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2854{
2855 //
2856 // Returns number of the innermost SENSITIVE propagation layer
2857 //
2858
2859 return GetLayerNumber(0);
2860}
2861
2862//______________________________________________________
2863
2864Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2865{
2866 //
2867 // Returns number of the outermost SENSITIVE time bin
2868 //
2869
2870 return GetLayerNumber(GetNumberOfTimeBins() - 1);
46d29e70 2871}
2872
5443e65e 2873//______________________________________________________
2874
2875Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2876{
2877 //
2878 // Returns number of SENSITIVE time bins
2879 //
2880
2881 Int_t tb, layer;
029cd327 2882 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
5443e65e 2883 layer = GetLayerNumber(tb);
2884 if(layer>=0) break;
2885 }
2886 return tb+1;
2887}
2888
2889//______________________________________________________
2890
2891void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2892{
2893 //
2894 // Insert layer <pl> in fLayers array.
2895 // Layers are sorted according to X coordinate.
2896
029cd327 2897 if ( fN == ((Int_t) kMaxLayersPerSector)) {
5443e65e 2898 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2899 return;
2900 }
2901 if (fN==0) {fLayers[fN++] = pl; return;}
2902 Int_t i=Find(pl->GetX());
2903
2904 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2905 fLayers[i]=pl; fN++;
2906
2907}
2908
2909//______________________________________________________
2910
2911Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2912{
2913 //
2914 // Returns index of the propagation layer nearest to X
2915 //
2916
2917 if (x <= fLayers[0]->GetX()) return 0;
2918 if (x > fLayers[fN-1]->GetX()) return fN;
2919 Int_t b=0, e=fN-1, m=(b+e)/2;
2920 for (; b<e; m=(b+e)/2) {
2921 if (x > fLayers[m]->GetX()) b=m+1;
2922 else e=m;
2923 }
2924 return m;
2925}
2926
3c625a9b 2927//______________________________________________________
2928void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2929{
2930 //
2931 // set centers and the width of sectors
2932 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2933 fZc[icham] = center[icham];
2934 fZmax[icham] = w[icham];
2935 fZmaxSensitive[icham] = wsensitive[icham];
2936 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2937 }
2938}
5443e65e 2939//______________________________________________________
2940
3c625a9b 2941void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2942{
2943 //
2944 // set centers and the width of sectors
2945 fHole = kFALSE;
2946 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2947 fIsHole[icham] = holes[icham];
2948 if (holes[icham]) fHole = kTRUE;
2949 }
2950}
2951
2952
2953
5443e65e 2954void AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
029cd327 2955 Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
a9814c09 2956 Bool_t &lookForCluster) const
5443e65e 2957{
2958 //
029cd327 2959 // Returns radial step <dx>, density <rho>, rad. length <radLength>,
5443e65e 2960 // and sensitivity <lookForCluster> in point <y,z>
2961 //
2962
2963 dx = fdX;
2964 rho = fRho;
029cd327 2965 radLength = fX0;
5443e65e 2966 lookForCluster = kFALSE;
3c625a9b 2967 //
2968 // check dead regions in sensitive volume
5443e65e 2969 if(fTimeBinIndex >= 0) {
3c625a9b 2970 //
2971 Int_t zone=-1;
029cd327 2972 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3c625a9b 2973 if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
2974 zone = ch;
2975 lookForCluster = !(fIsHole[zone]);
2976 if(TMath::Abs(y) > fYmaxSensitive){
2977 lookForCluster = kFALSE;
2978 }
2979 if (fIsHole[zone]) {
2980 //if hole
2981 rho = 1.29e-3;
2982 radLength = 36.66;
2983 }
2984 }
5443e65e 2985 }
3c625a9b 2986 return;
5443e65e 2987 }
3c625a9b 2988 //
2989 //
5443e65e 2990 // check hole
3c625a9b 2991 if (fHole==kFALSE) return;
2992 //
2993 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2994 if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
2995 if (fIsHole[ch]) {
2996 //if hole
2997 rho = 1.29e-3;
2998 radLength = 36.66;
2999 }
3000 }
3001 }
5443e65e 3002 return;
3003}
3004
3c625a9b 3005Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
3006{
3007 //
3008 //
3009 if (fTimeBinIndex < 0) return -20; //unknown
3010 Int_t zone=-10; // dead zone
3011 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3012 if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
3013 zone = ch;
3014 }
3015 return zone;
3016}
3017
3018
5443e65e 3019//______________________________________________________
3020
3021void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
a9814c09 3022 UInt_t index) {
5443e65e 3023
3024// Insert cluster in cluster array.
3025// Clusters are sorted according to Y coordinate.
3026
3027 if(fTimeBinIndex < 0) {
3028 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
3029 return;
3030 }
3031
029cd327 3032 if (fN== (Int_t) kMaxClusterPerTimeBin) {
5443e65e 3033 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
3034 return;
3035 }
3036 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
3037 Int_t i=Find(c->GetY());
3038 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3039 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
3040 fIndex[i]=index; fClusters[i]=c; fN++;
3041}
3042
3043//______________________________________________________
3044
3045Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const {
3046
3047// Returns index of the cluster nearest in Y
3048
3049 if (y <= fClusters[0]->GetY()) return 0;
3050 if (y > fClusters[fN-1]->GetY()) return fN;
3051 Int_t b=0, e=fN-1, m=(b+e)/2;
3052 for (; b<e; m=(b+e)/2) {
3053 if (y > fClusters[m]->GetY()) b=m+1;
3054 else e=m;
3055 }
3056 return m;
3057}
3058
fd621f36 3059//---------------------------------------------------------
5443e65e 3060
fd621f36 3061Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
3062//
3063// Returns correction factor for tilted pads geometry
3064//
5443e65e 3065
fd621f36 3066 Double_t h01 = sin(TMath::Pi() / 180.0 * fPar->GetTiltingAngle());
3067 Int_t det = c->GetDetector();
3068 Int_t plane = fGeom->GetPlane(det);
b3a5a838 3069
3070 if((plane == 1) || (plane == 3) || (plane == 5)) h01=-h01;
b8dc2353 3071
3072 if(fNoTilt) h01 = 0;
fd621f36 3073
3074 return h01;
3075}
5443e65e 3076
c630aafd 3077
3078
3079
3080
3081