Coverity fix
[u/mrichter/AliRoot.git] / TRD / TRDbase / AliTRDtrackerV1.cxx
CommitLineData
e4f2f73d 1/**************************************************************************
972ef65e 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**************************************************************************/
e4f2f73d 15
16/* $Id$ */
17
18///////////////////////////////////////////////////////////////////////////////
19// //
20// Track finder //
21// //
22// Authors: //
23// Alex Bercuci <A.Bercuci@gsi.de> //
24// Markus Fasel <M.Fasel@gsi.de> //
25// //
26///////////////////////////////////////////////////////////////////////////////
27
e4f2f73d 28#include <TBranch.h>
bb56afff 29#include <TDirectory.h>
e4f2f73d 30#include <TLinearFitter.h>
e4f2f73d 31#include <TTree.h>
32#include <TClonesArray.h>
e4f2f73d 33#include <TTreeStream.h>
eb2b4f91 34#include <TGeoMatrix.h>
35#include <TGeoManager.h>
e4f2f73d 36
37#include "AliLog.h"
fac58f00 38#include "AliMathBase.h"
e4f2f73d 39#include "AliESDEvent.h"
bb56afff 40#include "AliGeomManager.h"
e4f2f73d 41#include "AliRieman.h"
42#include "AliTrackPointArray.h"
43
e4f2f73d 44#include "AliTRDgeometry.h"
45#include "AliTRDpadPlane.h"
e4f2f73d 46#include "AliTRDcalibDB.h"
e4f2f73d 47#include "AliTRDReconstructor.h"
48#include "AliTRDCalibraFillHisto.h"
e4f2f73d 49#include "AliTRDrecoParam.h"
bb56afff 50
51#include "AliTRDcluster.h"
828c6f80 52#include "AliTRDdigitsParam.h"
e4f2f73d 53#include "AliTRDseedV1.h"
0906e73e 54#include "AliTRDtrackV1.h"
bb56afff 55#include "AliTRDtrackerV1.h"
56#include "AliTRDtrackerDebug.h"
57#include "AliTRDtrackingChamber.h"
58#include "AliTRDchamberTimeBin.h"
59
e4f2f73d 60ClassImp(AliTRDtrackerV1)
903326c1 61ClassImp(AliTRDtrackerV1::AliTRDLeastSquare)
62ClassImp(AliTRDtrackerV1::AliTRDtrackFitterRieman)
eb38ed55 63
2f4384e6 64AliTRDtrackerV1::ETRDtrackerV1BetheBloch AliTRDtrackerV1::fgBB = AliTRDtrackerV1::kGeant;
d76231c8 65Double_t AliTRDtrackerV1::fgTopologicQA[kNConfigs] = {
6e39bde4 66 0.5112, 0.5112, 0.5112, 0.0786, 0.0786,
41702fec 67 0.0786, 0.0786, 0.0579, 0.0579, 0.0474,
68 0.0474, 0.0408, 0.0335, 0.0335, 0.0335
e165b64b 69};
70const Double_t AliTRDtrackerV1::fgkX0[kNPlanes] = {
71 300.2, 312.8, 325.4, 338.0, 350.6, 363.2};
952051c5 72// Number of Time Bins/chamber should be also stored independently by the traker
73// (also in AliTRDReconstructor) in oder to be able to run HLT. Fix TODO
2985ffcb 74Int_t AliTRDtrackerV1::fgNTimeBins = 0;
4d6aee34 75AliRieman* AliTRDtrackerV1::fgRieman = NULL;
76TLinearFitter* AliTRDtrackerV1::fgTiltedRieman = NULL;
77TLinearFitter* AliTRDtrackerV1::fgTiltedRiemanConstrained = NULL;
e4f2f73d 78
79//____________________________________________________________________
33ab3872 80AliTRDtrackerV1::AliTRDtrackerV1(const AliTRDReconstructor *rec)
41702fec 81 :AliTracker()
4d6aee34 82 ,fkReconstructor(NULL)
9e85cb05 83 ,fkRecoParam(NULL)
4d6aee34 84 ,fGeom(NULL)
85 ,fClusters(NULL)
86 ,fTracklets(NULL)
87 ,fTracks(NULL)
b1135f96 88 ,fTracksESD(NULL)
41702fec 89 ,fSieveSeeding(0)
9dcc64cc 90 ,fEventInFile(-1)
e4f2f73d 91{
41702fec 92 //
93 // Default constructor.
94 //
eb2b4f91 95
96 SetReconstructor(rec); // initialize reconstructor
97
98 // initialize geometry
99 if(!AliGeomManager::GetGeometry()){
100 AliFatal("Could not get geometry.");
101 }
102 fGeom = new AliTRDgeometry();
103 fGeom->CreateClusterMatrixArray();
4d6aee34 104 TGeoHMatrix *matrix = NULL;
eb2b4f91 105 Double_t loc[] = {0., 0., 0.};
106 Double_t glb[] = {0., 0., 0.};
107 for(Int_t ily=kNPlanes; ily--;){
e165b64b 108 Int_t ism = 0;
109 while(!(matrix = fGeom->GetClusterMatrix(AliTRDgeometry::GetDetector(ily, 2, ism)))) ism++;
110 if(!matrix){
111 AliError(Form("Could not get transformation matrix for layer %d. Use default.", ily));
112 fR[ily] = fgkX0[ily];
eb2b4f91 113 continue;
114 }
115 matrix->LocalToMaster(loc, glb);
116 fR[ily] = glb[0]+ AliTRDgeometry::AnodePos()-.5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick();
117 }
118
eb2b4f91 119 // initialize cluster containers
053767a4 120 for (Int_t isector = 0; isector < AliTRDgeometry::kNsector; isector++) new(&fTrSec[isector]) AliTRDtrackingSector(fGeom, isector);
3a039a31 121
eb2b4f91 122 // initialize arrays
123 memset(fTrackQuality, 0, kMaxTracksStack*sizeof(Double_t));
124 memset(fSeedLayer, 0, kMaxTracksStack*sizeof(Int_t));
125 memset(fSeedTB, 0, kNSeedPlanes*sizeof(AliTRDchamberTimeBin*));
b1135f96 126 fTracksESD = new TClonesArray("AliESDtrack", 2*kMaxTracksStack);
ddfbc51a 127 fTracksESD->SetOwner();
eb38ed55 128}
129
e4f2f73d 130//____________________________________________________________________
131AliTRDtrackerV1::~AliTRDtrackerV1()
132{
41702fec 133 //
134 // Destructor
135 //
d2eba04b 136
4d6aee34 137 if(fgRieman) delete fgRieman; fgRieman = NULL;
138 if(fgTiltedRieman) delete fgTiltedRieman; fgTiltedRieman = NULL;
139 if(fgTiltedRiemanConstrained) delete fgTiltedRiemanConstrained; fgTiltedRiemanConstrained = NULL;
d611c74f 140 for(Int_t isl =0; isl<kNSeedPlanes; isl++) if(fSeedTB[isl]) delete fSeedTB[isl];
b1135f96 141 if(fTracksESD){ fTracksESD->Delete(); delete fTracksESD; }
41702fec 142 if(fTracks) {fTracks->Delete(); delete fTracks;}
143 if(fTracklets) {fTracklets->Delete(); delete fTracklets;}
d2eba04b 144 if(IsClustersOwner() && fClusters) {
145 AliInfo(Form("tracker[%p] removing %d own clusters @ %p", (void*)this, fClusters->GetEntries(), (void*)fClusters));
48f8adf3 146 fClusters->Delete(); delete fClusters;
147 }
41702fec 148 if(fGeom) delete fGeom;
e4f2f73d 149}
150
151//____________________________________________________________________
152Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd)
153{
41702fec 154 //
155 // Steering stand alone tracking for full TRD detector
156 //
157 // Parameters :
158 // esd : The ESD event. On output it contains
159 // the ESD tracks found in TRD.
160 //
161 // Output :
162 // Number of tracks found in the TRD detector.
163 //
164 // Detailed description
165 // 1. Launch individual SM trackers.
166 // See AliTRDtrackerV1::Clusters2TracksSM() for details.
167 //
168
9e85cb05 169 if(!fkRecoParam){
3a039a31 170 AliError("Reconstruction configuration not initialized. Call first AliTRDReconstructor::SetRecoParam().");
41702fec 171 return 0;
172 }
173
174 //AliInfo("Start Track Finder ...");
175 Int_t ntracks = 0;
053767a4 176 for(int ism=0; ism<AliTRDgeometry::kNsector; ism++){
41702fec 177 // for(int ism=1; ism<2; ism++){
178 //AliInfo(Form("Processing supermodule %i ...", ism));
179 ntracks += Clusters2TracksSM(ism, esd);
180 }
980d5a2a 181 AliInfo(Form("Number of tracks: !TRDin[%d]", ntracks));
41702fec 182 return ntracks;
e4f2f73d 183}
184
0906e73e 185
186//_____________________________________________________________________________
eb38ed55 187Bool_t AliTRDtrackerV1::GetTrackPoint(Int_t index, AliTrackPoint &p) const
0906e73e 188{
41702fec 189 //AliInfo(Form("Asking for tracklet %d", index));
190
84eab75a 191 // reset position of the point before using it
192 p.SetXYZ(0., 0., 0.);
2f7514a6 193 AliTRDseedV1 *tracklet = GetTracklet(index);
194 if (!tracklet) return kFALSE;
84eab75a 195
41702fec 196 // get detector for this tracklet
e165b64b 197 Int_t det = tracklet->GetDetector();
198 Int_t sec = fGeom->GetSector(det);
199 Double_t alpha = (sec+.5)*AliTRDgeometry::GetAlpha(),
200 sinA = TMath::Sin(alpha),
201 cosA = TMath::Cos(alpha);
41702fec 202 Double_t local[3];
e165b64b 203 local[0] = tracklet->GetX();
204 local[1] = tracklet->GetY();
205 local[2] = tracklet->GetZ();
41702fec 206 Double_t global[3];
e165b64b 207 fGeom->RotateBack(det, local, global);
208
209 Double_t cov2D[3]; Float_t cov[6];
210 tracklet->GetCovAt(local[0], cov2D);
211 cov[0] = cov2D[0]*sinA*sinA;
212 cov[1] =-cov2D[0]*sinA*cosA;
213 cov[2] =-cov2D[1]*sinA;
214 cov[3] = cov2D[0]*cosA*cosA;
215 cov[4] = cov2D[1]*cosA;
216 cov[5] = cov2D[2];
217 // store the global position of the tracklet and its covariance matrix in the track point
218 p.SetXYZ(global[0],global[1],global[2], cov);
41702fec 219
220 // setting volume id
e165b64b 221 AliGeomManager::ELayerID iLayer = AliGeomManager::ELayerID(AliGeomManager::kTRD1+fGeom->GetLayer(det));
222 Int_t modId = fGeom->GetSector(det) * AliTRDgeometry::kNstack + fGeom->GetStack(det);
41702fec 223 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer, modId);
224 p.SetVolumeID(volid);
225
226 return kTRUE;
0906e73e 227}
228
eb38ed55 229//____________________________________________________________________
230TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitter()
231{
41702fec 232 if(!fgTiltedRieman) fgTiltedRieman = new TLinearFitter(4, "hyp4");
233 return fgTiltedRieman;
eb38ed55 234}
0906e73e 235
eb38ed55 236//____________________________________________________________________
237TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitterConstraint()
238{
41702fec 239 if(!fgTiltedRiemanConstrained) fgTiltedRiemanConstrained = new TLinearFitter(2, "hyp2");
240 return fgTiltedRiemanConstrained;
eb38ed55 241}
41702fec 242
eb38ed55 243//____________________________________________________________________
244AliRieman* AliTRDtrackerV1::GetRiemanFitter()
245{
fac58f00 246 if(!fgRieman) fgRieman = new AliRieman(AliTRDseedV1::kNtb * AliTRDgeometry::kNlayer);
41702fec 247 return fgRieman;
eb38ed55 248}
41702fec 249
0906e73e 250//_____________________________________________________________________________
251Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event)
252{
2a3191bb 253// Propagation of ESD tracks from TPC to TOF detectors and building of the TRD track. For building
254// a TRD track an ESD track is used as seed. The informations obtained on the TRD track (measured points,
255// covariance, PID, etc.) are than used to update the corresponding ESD track.
256// Each track seed is first propagated to the geometrical limit of the TRD detector.
257// Its prolongation is searched in the TRD and if corresponding clusters are found tracklets are
258// constructed out of them (see AliTRDseedV1::AttachClusters()) and the track is updated.
259// Otherwise the ESD track is left unchanged.
260//
261// The following steps are performed:
262// 1. Selection of tracks based on the variance in the y-z plane.
263// 2. Propagation to the geometrical limit of the TRD volume. If track propagation fails the AliESDtrack::kTRDStop is set.
264// 3. Prolongation inside the fiducial volume (see AliTRDtrackerV1::FollowBackProlongation()) and marking
265// the following status bits:
266// - AliESDtrack::kTRDin - if the tracks enters the TRD fiducial volume
267// - AliESDtrack::kTRDStop - if the tracks fails propagation
268// - AliESDtrack::kTRDbackup - if the tracks fulfills chi2 conditions and qualify for refitting
269// 4. Writting to friends, PID, MC label, quality etc. Setting status bit AliESDtrack::kTRDout.
270// 5. Propagation to TOF. If track propagation fails the AliESDtrack::kTRDStop is set.
271//
272
e3d45279 273 if(!fClusters || !fClusters->GetEntriesFast()){
274 AliInfo("No TRD clusters");
275 return 0;
276 }
2a3191bb 277 AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); // Calibration monitor
e3d45279 278 if (!calibra) AliInfo("Could not get Calibra instance");
c6f7c6cb 279 if (!fgNTimeBins) fgNTimeBins = fkReconstructor->GetNTimeBins();
828c6f80 280
eb2b4f91 281 // Define scalers
88987d18 282 Int_t nFound = 0, // number of tracks found
283 nBacked = 0, // number of tracks backed up for refit
284 nSeeds = 0, // total number of ESD seeds
285 nTRDseeds= 0, // number of seeds in the TRD acceptance
286 nTPCseeds= 0; // number of TPC seeds
41702fec 287 Float_t foundMin = 20.0;
88987d18 288
289 Float_t *quality = NULL;
290 Int_t *index = NULL;
9dcc64cc 291 fEventInFile = event->GetEventNumberInFile();
eb2b4f91 292 nSeeds = event->GetNumberOfTracks();
293 // Sort tracks according to quality
294 // (covariance in the yz plane)
295 if(nSeeds){
88987d18 296 quality = new Float_t[nSeeds];
297 index = new Int_t[4*nSeeds];
298 for (Int_t iSeed = nSeeds; iSeed--;) {
d611c74f 299 AliESDtrack *seed = event->GetTrack(iSeed);
300 Double_t covariance[15];
301 seed->GetExternalCovariance(covariance);
88987d18 302 quality[iSeed] = covariance[0] + covariance[2];
d611c74f 303 }
88987d18 304 TMath::Sort(nSeeds, quality, index,kFALSE);
41702fec 305 }
88987d18 306
eb2b4f91 307 // Propagate all seeds
41702fec 308 Int_t expectedClr;
309 AliTRDtrackV1 track;
88987d18 310 for (Int_t iSeed = 0; iSeed < nSeeds; iSeed++) {
311
312 // Get the seeds in sorted sequence
313 AliESDtrack *seed = event->GetTrack(index[iSeed]);
314 Float_t p4 = seed->GetC(seed->GetBz());
315
316 // Check the seed status
317 ULong_t status = seed->GetStatus();
318 if ((status & AliESDtrack::kTRDout) != 0) continue;
319 if ((status & AliESDtrack::kTPCout)){
320 AliDebug(3, Form("Prolongate seed[%2d] which is TPC.", iSeed));
321 // set steering parameters for TPC
322 //fkRecoParam->SetTrackParam(kTPC);
323/* } else {
324 if ((status & AliESDtrack::kITSout)){
325 AliDebug(3, Form("Prolongate seed[%2d] which is ITS.", iSeed));
326 // set steering parameters for ITS
327 //fkRecoParam->SetTrackParam(kITS);
328 // rotate
329 Float_t globalToTracking = AliTRDgeometry::GetAlpha()*(Int_t(seed->GetAlpha()/AliTRDgeometry::GetAlpha()) + (seed->GetAlpha()>0. ? 0.5 : -0.5));
330 if(!seed->Rotate(globalToTracking)) continue;
331 } else continue;*/
332 } else continue;
333
334 // Propagate to the entrance in the TRD mother volume
335 track.~AliTRDtrackV1();
336 new(&track) AliTRDtrackV1(*seed);
337 if(AliTRDgeometry::GetXtrdBeg() > (AliTRDReconstructor::GetMaxStep() + track.GetX()) && !PropagateToX(track, AliTRDgeometry::GetXtrdBeg(), AliTRDReconstructor::GetMaxStep())){
338 seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop);
339 continue;
340 }
341 if(!AdjustSector(&track)){
342 seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop);
343 continue;
344 }
345 if(TMath::Abs(track.GetSnp()) > AliTRDReconstructor::GetMaxSnp()) {
346 seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop);
347 continue;
348 }
349 nTPCseeds++;
350 AliDebug(2, Form("TRD propagate TPC seed[%d] = %d.", iSeed, index[iSeed]));
351 // store track status at TRD entrance
352 seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup);
353
354 // prepare track and do propagation in the TRD
355 track.SetReconstructor(fkReconstructor);
356 track.SetKink(Bool_t(seed->GetKinkIndex(0)));
357 track.SetPrimary(status & AliESDtrack::kTPCin);
358 expectedClr = FollowBackProlongation(track);
359 // check if track entered the TRD fiducial volume
360 if(track.GetTrackIn()){
361 seed->UpdateTrackParams(&track, AliESDtrack::kTRDin);
362 nTRDseeds++;
363 }
364 // check if track was stopped in the TRD
365 if (expectedClr<0){
366 seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop);
367 continue;
368 } else {
369 nFound++;
370 // compute PID
371 track.CookPID();
372 //compute MC label
373 track.CookLabel(1. - AliTRDReconstructor::GetLabelFraction());
374 // update calibration references using this track
375 if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(&track);
41702fec 376 // save calibration object
2c7f43b6 377 if (fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 0 || AliTRDReconstructor::GetStreamLevel()>0 ) {
224f357f 378 AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(track);
379 calibTrack->SetOwner();
380 seed->AddCalibObject(calibTrack);
381 }
88987d18 382 //update ESD track
383 seed->UpdateTrackParams(&track, AliESDtrack::kTRDout);
384 track.UpdateESDtrack(seed);
385 }
4b5b4c5b 386
88987d18 387 // Make backup for back propagation
388 if ((TMath::Abs(track.GetC(track.GetBz()) - p4) / TMath::Abs(p4) < 0.2) || (track.Pt() > 0.8)) {
389 Int_t foundClr = track.GetNumberOfClusters();
390 if (foundClr >= foundMin) {
391 //if(track.GetBackupTrack()) UseClusters(track.GetBackupTrack());
4b5b4c5b 392
88987d18 393 // Sign only gold tracks
394 if (track.GetChi2() / track.GetNumberOfClusters() < 4) {
395 //if ((seed->GetKinkIndex(0) == 0) && (track.Pt() < 1.5)) UseClusters(&track);
396 }
397 Bool_t isGold = kFALSE;
398
399 // Full gold track
400 if (track.GetChi2() / track.GetNumberOfClusters() < 5) {
401 if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup);
402 nBacked++;
403 isGold = kTRUE;
404 }
405
406 // Almost gold track
407 if ((!isGold) && (track.GetNCross() == 0) && (track.GetChi2() / track.GetNumberOfClusters() < 7)) {
408 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
409 if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup);
410 nBacked++;
411 isGold = kTRUE;
412 }
413
414 if ((!isGold) && (track.GetBackupTrack())) {
415 if ((track.GetBackupTrack()->GetNumberOfClusters() > foundMin) && ((track.GetBackupTrack()->GetChi2()/(track.GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
416 seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup);
4b5b4c5b 417 nBacked++;
418 isGold = kTRUE;
419 }
41702fec 420 }
41702fec 421 }
88987d18 422 }
423
424 // Propagation to the TOF
425 if(!(seed->GetStatus()&AliESDtrack::kTRDStop)) {
426 Int_t sm = track.GetSector();
427 // default value in case we have problems with the geometry.
428 Double_t xtof = 371.;
429 //Calculate radial position of the beginning of the TOF
430 //mother volume. In order to avoid mixing of the TRD
431 //and TOF modules some hard values are needed. This are:
432 //1. The path to the TOF module.
433 //2. The width of the TOF (29.05 cm)
434 //(with the help of Annalisa de Caro Mar-17-2009)
435 if(gGeoManager){
436 gGeoManager->cd(Form("/ALIC_1/B077_1/BSEGMO%d_1/BTOF%d_1", sm, sm));
437 TGeoHMatrix *m = NULL;
438 Double_t loc[]={0., 0., -.5*29.05}, glob[3];
439
440 if((m=gGeoManager->GetCurrentMatrix())){
441 m->LocalToMaster(loc, glob);
442 xtof = TMath::Sqrt(glob[0]*glob[0]+glob[1]*glob[1]);
4b5b4c5b 443 }
41702fec 444 }
88987d18 445 if(xtof > (AliTRDReconstructor::GetMaxStep() + track.GetX()) && !PropagateToX(track, xtof, AliTRDReconstructor::GetMaxStep())){
446 seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop);
447 continue;
448 }
449 if(!AdjustSector(&track)){
450 seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop);
451 continue;
452 }
453 if(TMath::Abs(track.GetSnp()) > AliTRDReconstructor::GetMaxSnp()){
454 seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop);
455 continue;
456 }
457 //seed->UpdateTrackParams(&track, AliESDtrack::kTRDout);
458 // TODO obsolete - delete
459 seed->SetTRDQuality(track.StatusForTOF());
41702fec 460 }
88987d18 461 seed->SetTRDBudget(track.GetBudget(0));
41702fec 462 }
88987d18 463 if(index) delete [] index;
464 if(quality) delete [] quality;
41702fec 465
88987d18 466 AliInfo(Form("Number of seeds: TPCout[%d] TRDin[%d]", nTPCseeds, nTRDseeds));
467 AliInfo(Form("Number of tracks: TRDout[%d] TRDbackup[%d]", nFound, nBacked));
d4cf71ca 468
d611c74f 469 // run stand alone tracking
4d6aee34 470 if (fkReconstructor->IsSeeding()) Clusters2Tracks(event);
41702fec 471
472 return 0;
0906e73e 473}
474
475
476//____________________________________________________________________
477Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event)
478{
41702fec 479 //
480 // Refits tracks within the TRD. The ESD event is expected to contain seeds
481 // at the outer part of the TRD.
482 // The tracks are propagated to the innermost time bin
483 // of the TRD and the ESD event is updated
484 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
485 //
486
487 Int_t nseed = 0; // contor for loaded seeds
488 Int_t found = 0; // contor for updated TRD tracks
489
490
e3d45279 491 if(!fClusters || !fClusters->GetEntriesFast()){
492 AliInfo("No TRD clusters");
493 return 0;
494 }
41702fec 495 AliTRDtrackV1 track;
496 for (Int_t itrack = 0; itrack < event->GetNumberOfTracks(); itrack++) {
497 AliESDtrack *seed = event->GetTrack(itrack);
050875b0 498 ULong_t status = seed->GetStatus();
88987d18 499
050875b0 500 new(&track) AliTRDtrackV1(*seed);
41702fec 501 if (track.GetX() < 270.0) {
502 seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup);
503 continue;
504 }
88987d18 505
506 // reject tracks which failed propagation in the TRD or
507 // are produced by the TRD stand alone tracker
508 if(!(status & AliESDtrack::kTRDout)) continue;
509 if(!(status & AliESDtrack::kTRDin)) continue;
510 nseed++;
41702fec 511
512 track.ResetCovariance(50.0);
513
514 // do the propagation and processing
515 Bool_t kUPDATE = kFALSE;
88987d18 516 Double_t xTPC = 250.0;
41702fec 517 if(FollowProlongation(track)){
e3cf3d02 518 // Update the friend track
2c7f43b6 519 if (fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 0 || AliTRDReconstructor::GetStreamLevel()>0 ){
4d6aee34 520 TObject *o = NULL; Int_t ic = 0;
521 AliTRDtrackV1 *calibTrack = NULL;
e3cf3d02 522 while((o = seed->GetCalibObject(ic++))){
523 if(!(calibTrack = dynamic_cast<AliTRDtrackV1*>(o))) continue;
a310e49b 524 calibTrack->SetTrackOut(&track);
e3cf3d02 525 }
41702fec 526 }
a310e49b 527
528 // Prolongate to TPC
88987d18 529 if (PropagateToX(track, xTPC, AliTRDReconstructor::GetMaxStep())) { // -with update
a310e49b 530 seed->UpdateTrackParams(&track, AliESDtrack::kTRDrefit);
531 found++;
532 kUPDATE = kTRUE;
533 }
e3cf3d02 534 }
41702fec 535
536 // Prolongate to TPC without update
537 if(!kUPDATE) {
538 AliTRDtrackV1 tt(*seed);
88987d18 539 if (PropagateToX(tt, xTPC, AliTRDReconstructor::GetMaxStep())) seed->UpdateTrackParams(&tt, AliESDtrack::kTRDbackup);
41702fec 540 }
541 }
980d5a2a 542 AliInfo(Form("Number of seeds: TRDout[%d]", nseed));
543 AliInfo(Form("Number of tracks: TRDrefit[%d]", found));
41702fec 544
545 return 0;
0906e73e 546}
547
0906e73e 548//____________________________________________________________________
549Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t)
550{
41702fec 551 // Extrapolates the TRD track in the TPC direction.
552 //
553 // Parameters
554 // t : the TRD track which has to be extrapolated
555 //
556 // Output
557 // number of clusters attached to the track
558 //
559 // Detailed description
560 //
561 // Starting from current radial position of track <t> this function
562 // extrapolates the track through the 6 TRD layers. The following steps
563 // are being performed for each plane:
564 // 1. prepare track:
565 // a. get plane limits in the local x direction
566 // b. check crossing sectors
567 // c. check track inclination
568 // 2. search tracklet in the tracker list (see GetTracklet() for details)
569 // 3. evaluate material budget using the geo manager
570 // 4. propagate and update track using the tracklet information.
571 //
572 // Debug level 2
573 //
574
575 Int_t nClustersExpected = 0;
e3cf3d02 576 for (Int_t iplane = kNPlanes; iplane--;) {
17896e82 577 Int_t index(-1);
41702fec 578 AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index);
17896e82 579 AliDebug(2, Form("Tracklet[%p] ly[%d] idx[%d]", (void*)tracklet, iplane, index));
41702fec 580 if(!tracklet) continue;
980d5a2a 581 if(!tracklet->IsOK()){
582 AliDebug(1, Form("Tracklet Det[%d] !OK", tracklet->GetDetector()));
583 continue;
584 }
e3cf3d02 585 Double_t x = tracklet->GetX();//GetX0();
41702fec 586 // reject tracklets which are not considered for inward refit
88987d18 587 if(x > t.GetX()+AliTRDReconstructor::GetMaxStep()) continue;
588
41702fec 589 // append tracklet to track
590 t.SetTracklet(tracklet, index);
591
952051c5 592 if (x < (t.GetX()-AliTRDReconstructor::GetMaxStep()) && !PropagateToX(t, x+AliTRDReconstructor::GetMaxStep(), AliTRDReconstructor::GetMaxStep())) break;
41702fec 593 if (!AdjustSector(&t)) break;
594
595 // Start global position
596 Double_t xyz0[3];
597 t.GetXYZ(xyz0);
598
599 // End global position
600 Double_t alpha = t.GetAlpha(), y, z;
601 if (!t.GetProlongation(x,y,z)) break;
602 Double_t xyz1[3];
603 xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha);
604 xyz1[1] = x * TMath::Sin(alpha) + y * TMath::Cos(alpha);
605 xyz1[2] = z;
606
51a23065 607 Double_t length = TMath::Sqrt(
608 (xyz0[0]-xyz1[0])*(xyz0[0]-xyz1[0]) +
609 (xyz0[1]-xyz1[1])*(xyz0[1]-xyz1[1]) +
610 (xyz0[2]-xyz1[2])*(xyz0[2]-xyz1[2])
611 );
612 if(length>0.){
613 // Get material budget
614 Double_t param[7];
615 if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) break;
616 Double_t xrho= param[0]*param[4];
617 Double_t xx0 = param[1]; // Get mean propagation parameters
618
619 // Propagate and update
620 t.PropagateTo(x, xx0, xrho);
621 if (!AdjustSector(&t)) break;
622 }
e3cf3d02 623
b72f4eaf 624 Double_t cov[3]; tracklet->GetCovAt(x, cov);
625 Double_t p[2] = { tracklet->GetY(), tracklet->GetZ()};
626 Double_t chi2 = ((AliExternalTrackParam)t).GetPredictedChi2(p, cov);
39d9c03c 627
628 if(fkReconstructor->IsDebugStreaming()){
629 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
630 TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
631 AliExternalTrackParam param0(t);
632 AliExternalTrackParam param1(t);
633 param1.Update(p, cov);
634 TVectorD vcov(3,cov);
635 TVectorD vpar(3,p);
636 cstreamer << "FollowProlongationInfo"
637 << "EventNumber=" << eventNumber
638 << "iplane="<<iplane
639 << "vcov.="<<&vcov
640 << "vpar.="<<&vpar
641 << "tracklet.=" << tracklet
642 << "chi2="<< chi2
643 << "param0.=" << &param0
644 << "param1.=" << &param1
645 << "\n";
646 }
647 /*
648 AliInfo(Form("Pl:%d X:%+e : %+e P: %+e %+e Cov:%+e %+e %+e -> dXY: %+e %+e | chi2:%.2f pT:%.2f alp:%.3f",
649 iplane,x,t.GetX(),p[0],p[1],cov[0],cov[1],cov[2],
650 p[0]-t.GetY(),p[1]-t.GetZ(),
651 chi2,t.Pt()*t.Charge(),t.GetAlpha()));
652 */
653 if (chi2 < fkRecoParam->GetChi2Cut() && ((AliExternalTrackParam&)t).Update(p, cov)){ // MI parameterizad chi2 cut 03.05.2014
654 // if (chi2 < 1e+10 && ((AliExternalTrackParam&)t).Update(p, cov)){
ef867f55 655 // Register info to track
656 t.SetNumberOfClusters();
657 t.UpdateChi2(chi2);
41702fec 658 nClustersExpected += tracklet->GetN();
659 }
660 }
661
2c7f43b6 662 if(fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 || AliTRDReconstructor::GetStreamLevel()>1){
41702fec 663 Int_t index;
51a23065 664 for(int iplane=0; iplane<AliTRDgeometry::kNlayer; iplane++){
41702fec 665 AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index);
666 if(!tracklet) continue;
667 t.SetTracklet(tracklet, index);
668 }
669
a2fbb6ec 670 if(fkReconstructor->IsDebugStreaming()){
671 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
672 TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
673 AliTRDtrackV1 track(t);
674 track.SetOwner();
675 cstreamer << "FollowProlongation"
676 << "EventNumber=" << eventNumber
677 << "ncl=" << nClustersExpected
678 << "track.=" << &track
679 << "\n";
680 }
41702fec 681 }
41702fec 682 return nClustersExpected;
0906e73e 683
684}
685
686//_____________________________________________________________________________
687Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t)
688{
afa21247 689// Extrapolates/Build the TRD track in the TOF direction.
690//
691// Parameters
692// t : the TRD track which has to be extrapolated
693//
694// Output
695// number of clusters attached to the track
696//
697// Starting from current radial position of track <t> this function
698// extrapolates the track through the 6 TRD layers. The following steps
699// are being performed for each plane:
700// 1. Propagate track to the entrance of the next chamber:
701// - get chamber limits in the radial direction
702// - check crossing sectors
703// - check track inclination
704// - check track prolongation against boundary conditions (see exclusion boundaries on AliTRDgeometry::IsOnBoundary())
705// 2. Build tracklet (see AliTRDseed::AttachClusters() for details) for this layer if needed. If only
706// Kalman filter is needed and tracklets are already linked to the track this step is skipped.
707// 3. Fit tracklet using the information from the Kalman filter.
708// 4. Propagate and update track at reference radial position of the tracklet.
709// 5. Register tracklet with the tracker and track; update pulls monitoring.
710//
711// Observation
2a3191bb 712// 1. During the propagation a bit map is filled detailing the status of the track in each TRD chamber. The following errors are being registered for each tracklet:
713// - AliTRDtrackV1::kProlongation : track prolongation failed
714// - AliTRDtrackV1::kPropagation : track prolongation failed
715// - AliTRDtrackV1::kAdjustSector : failed during sector crossing
716// - AliTRDtrackV1::kSnp : too large bending
717// - AliTRDtrackV1::kTrackletInit : fail to initialize tracklet
718// - AliTRDtrackV1::kUpdate : fail to attach clusters or fit the tracklet
719// - AliTRDtrackV1::kUnknown : anything which is not covered before
afa21247 720// 2. By default the status of the track before first TRD update is saved.
721//
722// Debug level 2
723//
724// Author
725// Alexandru Bercuci <A.Bercuci@gsi.de>
726//
41702fec 727
eb2b4f91 728 Int_t n = 0;
729 Double_t driftLength = .5*AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick();
4d6aee34 730 AliTRDtrackingChamber *chamber = NULL;
41702fec 731
9e85cb05 732 Int_t debugLevel = fkReconstructor->IsDebugStreaming() ? fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) : 0;
2c7f43b6 733 if ( AliTRDReconstructor::GetStreamLevel()>0) debugLevel= AliTRDReconstructor::GetStreamLevel();
7c3eecb8 734 TTreeSRedirector *cstreamer = fkReconstructor->IsDebugStreaming() ? fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker) : 0x0;
735
36574ea4 736 Bool_t kStoreIn(kTRUE), // toggel store track params. at TRD entry
68f9b6bd 737 kStandAlone(kFALSE), // toggle tracker awarness of stand alone seeding
738 kUseTRD(fkRecoParam->IsOverPtThreshold(t.Pt()));// use TRD measurment to update Kalman
739
740 Int_t startLayer(0);
4d6aee34 741 AliTRDseedV1 tracklet, *ptrTracklet = NULL;
68f9b6bd 742 // Special case for stand alone tracking
743 // - store all tracklets found by seeding
744 // - start propagation from first tracklet found
181d2c97 745 AliTRDseedV1 *tracklets[kNPlanes];
746 memset(tracklets, 0, sizeof(AliTRDseedV1 *) * kNPlanes);
68f9b6bd 747 for(Int_t ip(kNPlanes); ip--;){
748 if(!(tracklets[ip] = t.GetTracklet(ip))) continue;
181d2c97 749 t.UnsetTracklet(ip);
68f9b6bd 750 if(tracklets[ip]->IsOK()) startLayer=ip;
751 kStandAlone = kTRUE;
0b559d95 752 kUseTRD = kTRUE;
181d2c97 753 }
68f9b6bd 754 AliDebug(4, Form("SA[%c] Start[%d]\n"
755 " [0]idx[%d] traklet[%p]\n"
756 " [1]idx[%d] traklet[%p]\n"
757 " [2]idx[%d] traklet[%p]\n"
758 " [3]idx[%d] traklet[%p]\n"
759 " [4]idx[%d] traklet[%p]\n"
760 " [5]idx[%d] traklet[%p]"
761 , kStandAlone?'y':'n', startLayer
762 , t.GetTrackletIndex(0), (void*)tracklets[0]
763 , t.GetTrackletIndex(1), (void*)tracklets[1]
764 , t.GetTrackletIndex(2), (void*)tracklets[2]
765 , t.GetTrackletIndex(3), (void*)tracklets[3]
766 , t.GetTrackletIndex(4), (void*)tracklets[4]
767 , t.GetTrackletIndex(5), (void*)tracklets[5]));
e3cf3d02 768
053767a4 769 // Loop through the TRD layers
4d6aee34 770 TGeoHMatrix *matrix = NULL;
3e860707 771 Double_t x(0.), y(0.), z(0.);
68f9b6bd 772 for (Int_t ily=startLayer, sm=-1, stk=-1, det=-1; ily < AliTRDgeometry::kNlayer; ily++) {
1bd708e3 773 AliDebug(2, Form("Propagate to x[%d] = %7.2f", ily, fR[ily]));
774
eb2b4f91 775 // rough estimate of the entry point
776 if (!t.GetProlongation(fR[ily], y, z)){
88987d18 777 n=-1;
34b5e42d 778 t.SetErrStat(AliTRDtrackV1::kProlongation);
1bd708e3 779 AliDebug(4, Form("Failed Rough Prolongation to ly[%d] x[%7.2f] y[%7.2f] z[%7.2f]", ily, fR[ily], y, z));
eb2b4f91 780 break;
781 }
41702fec 782
eb2b4f91 783 // find sector / stack / detector
784 sm = t.GetSector();
785 // TODO cross check with y value !
786 stk = fGeom->GetStack(z, ily);
787 det = stk>=0 ? AliTRDgeometry::GetDetector(ily, stk, sm) : -1;
4d6aee34 788 matrix = det>=0 ? fGeom->GetClusterMatrix(det) : NULL;
eb2b4f91 789
790 // check if supermodule/chamber is installed
791 if( !fGeom->GetSMstatus(sm) ||
792 stk<0. ||
793 fGeom->IsHole(ily, stk, sm) ||
794 !matrix ){
1bd708e3 795 AliDebug(4, Form("Missing Geometry ly[%d]. Guess radial position", ily));
eb2b4f91 796 // propagate to the default radial position
952051c5 797 if(fR[ily] > (AliTRDReconstructor::GetMaxStep() + t.GetX()) && !PropagateToX(t, fR[ily], AliTRDReconstructor::GetMaxStep())){
88987d18 798 n=-1;
34b5e42d 799 t.SetErrStat(AliTRDtrackV1::kPropagation);
1bd708e3 800 AliDebug(4, "Failed Propagation [Missing Geometry]");
41702fec 801 break;
802 }
eb2b4f91 803 if(!AdjustSector(&t)){
88987d18 804 n=-1;
34b5e42d 805 t.SetErrStat(AliTRDtrackV1::kAdjustSector);
1bd708e3 806 AliDebug(4, "Failed Adjust Sector [Missing Geometry]");
eb2b4f91 807 break;
808 }
952051c5 809 if(TMath::Abs(t.GetSnp()) > AliTRDReconstructor::GetMaxSnp()){
88987d18 810 n=-1;
34b5e42d 811 t.SetErrStat(AliTRDtrackV1::kSnp);
1bd708e3 812 AliDebug(4, "Failed Max Snp [Missing Geometry]");
eb2b4f91 813 break;
814 }
34b5e42d 815 t.SetErrStat(AliTRDtrackV1::kGeometry, ily);
41702fec 816 continue;
817 }
e3cf3d02 818
eb2b4f91 819 // retrieve rotation matrix for the current chamber
820 Double_t loc[] = {AliTRDgeometry::AnodePos()- driftLength, 0., 0.};
821 Double_t glb[] = {0., 0., 0.};
822 matrix->LocalToMaster(loc, glb);
88987d18 823 AliDebug(3, Form("Propagate to det[%3d] x_anode[%7.2f] (%f %f)", det, glb[0]+driftLength, glb[1], glb[2]));
eb2b4f91 824
825 // Propagate to the radial distance of the current layer
952051c5 826 x = glb[0] - AliTRDReconstructor::GetMaxStep();
827 if(x > (AliTRDReconstructor::GetMaxStep() + t.GetX()) && !PropagateToX(t, x, AliTRDReconstructor::GetMaxStep())){
88987d18 828 n=-1;
34b5e42d 829 t.SetErrStat(AliTRDtrackV1::kPropagation);
88987d18 830 AliDebug(4, Form("Failed Initial Propagation to x[%7.2f]", x));
eb2b4f91 831 break;
832 }
833 if(!AdjustSector(&t)){
88987d18 834 n=-1;
34b5e42d 835 t.SetErrStat(AliTRDtrackV1::kAdjustSector);
1bd708e3 836 AliDebug(4, "Failed Adjust Sector Start");
eb2b4f91 837 break;
838 }
952051c5 839 if(TMath::Abs(t.GetSnp()) > AliTRDReconstructor::GetMaxSnp()) {
88987d18 840 n=-1;
34b5e42d 841 t.SetErrStat(AliTRDtrackV1::kSnp);
952051c5 842 AliDebug(4, Form("Failed Max Snp[%f] MaxSnp[%f]", t.GetSnp(), AliTRDReconstructor::GetMaxSnp()));
eb2b4f91 843 break;
844 }
4d6aee34 845 Bool_t doRecalculate = kFALSE;
eb2b4f91 846 if(sm != t.GetSector()){
847 sm = t.GetSector();
4d6aee34 848 doRecalculate = kTRUE;
eb2b4f91 849 }
850 if(stk != fGeom->GetStack(z, ily)){
851 stk = fGeom->GetStack(z, ily);
4d6aee34 852 doRecalculate = kTRUE;
eb2b4f91 853 }
4d6aee34 854 if(doRecalculate){
eb2b4f91 855 det = AliTRDgeometry::GetDetector(ily, stk, sm);
856 if(!(matrix = fGeom->GetClusterMatrix(det))){
34b5e42d 857 t.SetErrStat(AliTRDtrackV1::kGeometry, ily);
1bd708e3 858 AliDebug(4, Form("Failed Geometry Matrix ly[%d]", ily));
eb2b4f91 859 continue;
860 }
861 matrix->LocalToMaster(loc, glb);
952051c5 862 x = glb[0] - AliTRDReconstructor::GetMaxStep();
eb2b4f91 863 }
864
865 // check if track is well inside fiducial volume
952051c5 866 if (!t.GetProlongation(x+AliTRDReconstructor::GetMaxStep(), y, z)) {
88987d18 867 n=-1;
34b5e42d 868 t.SetErrStat(AliTRDtrackV1::kProlongation);
952051c5 869 AliDebug(4, Form("Failed Prolongation to x[%7.2f] y[%7.2f] z[%7.2f]", x+AliTRDReconstructor::GetMaxStep(), y, z));
eb2b4f91 870 break;
871 }
872 if(fGeom->IsOnBoundary(det, y, z, .5)){
34b5e42d 873 t.SetErrStat(AliTRDtrackV1::kBoundary, ily);
1bd708e3 874 AliDebug(4, "Failed Track on Boundary");
eb2b4f91 875 continue;
876 }
b1957d3c 877
86a261ed 878 Float_t prod(t.GetBz()*t.Charge());
eb2b4f91 879 ptrTracklet = tracklets[ily];
880 if(!ptrTracklet){ // BUILD TRACKLET
1bd708e3 881 AliDebug(3, Form("Building tracklet det[%d]", det));
eb2b4f91 882 // check data in supermodule
883 if(!fTrSec[sm].GetNChambers()){
34b5e42d 884 t.SetErrStat(AliTRDtrackV1::kNoClusters, ily);
88987d18 885 AliDebug(4, "Failed NoClusters");
eb2b4f91 886 continue;
887 }
888 if(fTrSec[sm].GetX(ily) < 1.){
34b5e42d 889 t.SetErrStat(AliTRDtrackV1::kNoClusters, ily);
88987d18 890 AliDebug(4, "Failed NoX");
eb2b4f91 891 continue;
892 }
893
894 // check data in chamber
895 if(!(chamber = fTrSec[sm].GetChamber(stk, ily))){
34b5e42d 896 t.SetErrStat(AliTRDtrackV1::kNoClusters, ily);
88987d18 897 AliDebug(4, "Failed No Detector");
eb2b4f91 898 continue;
899 }
9e85cb05 900 if(chamber->GetNClusters() < fgNTimeBins*fkRecoParam ->GetFindableClusters()){
34b5e42d 901 t.SetErrStat(AliTRDtrackV1::kNoClusters, ily);
88987d18 902 AliDebug(4, "Failed Not Enough Clusters in Detector");
eb2b4f91 903 continue;
904 }
905 // build tracklet
4d8f1bd9 906 tracklet.~AliTRDseedV1();
eb2b4f91 907 ptrTracklet = new(&tracklet) AliTRDseedV1(det);
4d6aee34 908 ptrTracklet->SetReconstructor(fkReconstructor);
eb2b4f91 909 ptrTracklet->SetKink(t.IsKink());
2eb10c34 910 ptrTracklet->SetPrimary(t.IsPrimary());
eb2b4f91 911 ptrTracklet->SetPadPlane(fGeom->GetPadPlane(ily, stk));
829e9a79 912 //set first approximation of radial position of anode wire corresponding to middle chamber y=0, z=0
913 // the uncertainty is given by the actual position of the tracklet (y,z) and chamber inclination
eb2b4f91 914 ptrTracklet->SetX0(glb[0]+driftLength);
4d8f1bd9 915 if(!ptrTracklet->Init(&t)){
88987d18 916 n=-1;
34b5e42d 917 t.SetErrStat(AliTRDtrackV1::kTrackletInit);
1bd708e3 918 AliDebug(4, "Failed Tracklet Init");
eb2b4f91 919 break;
920 }
803dc399 921 // Select attachment base on track to B field sign not only track charge which is buggy
922 // mark kFALSE same sign tracks and kTRUE opposite sign tracks
923 // A.Bercuci 3.11.2011
803dc399 924 if(!ptrTracklet->AttachClusters(chamber, kTRUE, prod<0.?kTRUE:kFALSE, fEventInFile)){
34b5e42d 925 t.SetErrStat(AliTRDtrackV1::kNoAttach, ily);
7c3eecb8 926 if(debugLevel>3){
927 AliTRDseedV1 trackletCp(*ptrTracklet);
928 UChar_t status(t.GetStatusTRD(ily));
9dcc64cc 929 (*cstreamer) << "FollowBackProlongation4"
7c3eecb8 930 <<"status=" << status
931 <<"tracklet.=" << &trackletCp
932 << "\n";
933 }
1bd708e3 934 AliDebug(4, "Failed Attach Clusters");
eb2b4f91 935 continue;
936 }
88987d18 937 AliDebug(3, Form("Number of Clusters in Tracklet: %d", ptrTracklet->GetN()));
938 if(ptrTracklet->GetN() < fgNTimeBins*fkRecoParam->GetFindableClusters()){
34b5e42d 939 t.SetErrStat(AliTRDtrackV1::kNoClustersTracklet, ily);
7c3eecb8 940 if(debugLevel>3){
941 AliTRDseedV1 trackletCp(*ptrTracklet);
942 UChar_t status(t.GetStatusTRD(ily));
9dcc64cc 943 (*cstreamer) << "FollowBackProlongation4"
7c3eecb8 944 <<"status=" << status
945 <<"tracklet.=" << &trackletCp
946 << "\n";
947 }
88987d18 948 AliDebug(4, "Failed N Clusters Attached");
eb2b4f91 949 continue;
950 }
951 ptrTracklet->UpdateUsed();
0217fcd0 952 } else AliDebug(2, Form("Use external tracklet ly[%d]", ily));
eb2b4f91 953 // propagate track to the radial position of the tracklet
68f9b6bd 954
829e9a79 955 // fit tracklet in the local chamber coordinate system
2eb10c34 956 // tilt correction options
957 // 0 : no correction
958 // 2 : pseudo tilt correction
cb29fcbf 959 if(!ptrTracklet->FitRobust(fGeom->GetPadPlane(ily, stk), matrix, t.GetBz(), t.Charge())){
34b5e42d 960 t.SetErrStat(AliTRDtrackV1::kNoFit, ily);
1bd708e3 961 AliDebug(4, "Failed Tracklet Fit");
eb2b4f91 962 continue;
963 }
829e9a79 964 // Calculate tracklet position in tracking coordinates
965 // A.Bercuci 27.11.2013
966 ptrTracklet->SetXYZ(matrix);
967
eb2b4f91 968 x = ptrTracklet->GetX(); //GetX0();
952051c5 969 if(x > (AliTRDReconstructor::GetMaxStep() + t.GetX()) && !PropagateToX(t, x, AliTRDReconstructor::GetMaxStep())) {
88987d18 970 n=-1;
34b5e42d 971 t.SetErrStat(AliTRDtrackV1::kPropagation);
1bd708e3 972 AliDebug(4, Form("Failed Propagation to Tracklet x[%7.2f]", x));
eb2b4f91 973 break;
974 }
975 if(!AdjustSector(&t)) {
88987d18 976 n=-1;
34b5e42d 977 t.SetErrStat(AliTRDtrackV1::kAdjustSector);
1bd708e3 978 AliDebug(4, "Failed Adjust Sector");
eb2b4f91 979 break;
41702fec 980 }
952051c5 981 if(TMath::Abs(t.GetSnp()) > AliTRDReconstructor::GetMaxSnp()) {
88987d18 982 n=-1;
34b5e42d 983 t.SetErrStat(AliTRDtrackV1::kSnp);
952051c5 984 AliDebug(4, Form("Failed Max Snp[%f] MaxSnp[%f]", t.GetSnp(), AliTRDReconstructor::GetMaxSnp()));
eb2b4f91 985 break;
986 }
b72f4eaf 987 Double_t cov[3]; ptrTracklet->GetCovAt(x, cov);
988 Double_t p[2] = { ptrTracklet->GetY(), ptrTracklet->GetZ()};
989 Double_t chi2 = ((AliExternalTrackParam)t).GetPredictedChi2(p, cov);
2c7f43b6 990 /*
bb298b3b 991 AliInfo(Form("Pl:%d X:%+e : %+e P: %+e %+e Cov:%+e %+e %+e -> dXY: %+e %+e | chi2:%.2f pT:%.2f alp:%.3f",
992 ily,x,t.GetX(),p[0],p[1],cov[0],cov[1],cov[2],
993 p[0]-t.GetY(),p[1]-t.GetZ(),
994 chi2,t.Pt()*t.Charge(),t.GetAlpha()));
2c7f43b6 995 */
996
997 if(fkReconstructor->IsDebugStreaming()){
998 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
999 // TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
1000 AliExternalTrackParam param0(t);
1001 AliExternalTrackParam param1(t);
1002 param1.Update(p, cov);
1003 TVectorD vcov(3,cov);
1004 TVectorD vpar(3,p);
1005 (*cstreamer) << "FollowBackProlongationInfo"
1006 << "EventNumber=" << eventNumber
1007 << "chi2="<<chi2
1008 << "iplane="<<ily
1009 << "vcov.="<<&vcov
1010 << "vpar.="<<&vpar
1011 << "tracklet.=" << ptrTracklet
1012 << "param0.=" << &param0
1013 << "param1.=" << &param1
1014 << "\n";
39d9c03c 1015 }
1016
1017 // update Kalman with the TRD measurement
1018 if (chi2> fkRecoParam->GetChi2Cut()){ // MI parameterizad chi2 cut 03.05.2014
86a261ed 1019 t.SetErrStat(AliTRDtrackV1::kChi2, ily);
1020 if(debugLevel > 2){
1021 UChar_t status(t.GetStatusTRD());
1022 AliTRDseedV1 trackletCp(*ptrTracklet);
1023 AliTRDtrackV1 trackCp(t);
1024 trackCp.SetOwner();
1025 (*cstreamer) << "FollowBackProlongation3"
1026 << "status=" << status
1027 << "tracklet.=" << &trackletCp
1028 << "track.=" << &trackCp
1029 << "\n";
1030 }
1031 AliDebug(4, Form("Failed Chi2[%f]", chi2));
1032 continue;
68d29486 1033 }
88987d18 1034 // mark track as entering the FIDUCIAL volume of TRD
1035 if(kStoreIn){
1036 t.SetTrackIn();
1037 kStoreIn = kFALSE;
1038 }
ef867f55 1039 if(kUseTRD){
1040 if(!((AliExternalTrackParam&)t).Update(p, cov)) {
88987d18 1041 n=-1;
34b5e42d 1042 t.SetErrStat(AliTRDtrackV1::kUpdate);
ef867f55 1043 if(debugLevel > 2){
1044 UChar_t status(t.GetStatusTRD());
1045 AliTRDseedV1 trackletCp(*ptrTracklet);
1046 AliTRDtrackV1 trackCp(t);
1047 trackCp.SetOwner();
9dcc64cc 1048 (*cstreamer) << "FollowBackProlongation3"
ef867f55 1049 << "status=" << status
1050 << "tracklet.=" << &trackletCp
1051 << "track.=" << &trackCp
1052 << "\n";
1053 }
1054 AliDebug(4, Form("Failed Track Update @ y[%7.2f] z[%7.2f] s2y[%f] s2z[%f] covyz[%f]", p[0], p[1], cov[0], cov[2], cov[1]));
1055 break;
7c3eecb8 1056 }
eb2b4f91 1057 }
68f9b6bd 1058 if(!kStandAlone) ptrTracklet->UseClusters();
b72f4eaf 1059 // fill residuals ?!
1060 AliTracker::FillResiduals(&t, p, cov, ptrTracklet->GetVolumeId());
1061
eb2b4f91 1062
4d8f1bd9 1063 // register tracklet with the tracker and track
803dc399 1064 // Save inside the tracklet the track parameters BEFORE track update.
1065 // Commented out their overwriting AFTER track update
1066 // A.Bercuci 3.11.2011
1067 //ptrTracklet->Update(&t);
eb2b4f91 1068 ptrTracklet = SetTracklet(ptrTracklet);
17896e82 1069 Int_t index(fTracklets->GetEntriesFast()-1);
1070 t.SetTracklet(ptrTracklet, index);
ef867f55 1071 // Register info to track
1072 t.SetNumberOfClusters();
1073 t.UpdateChi2(chi2);
1074
eb2b4f91 1075 n += ptrTracklet->GetN();
17896e82 1076 AliDebug(2, Form("Setting Tracklet[%d] @ Idx[%d]", ily, index));
eb2b4f91 1077
41702fec 1078 // Reset material budget if 2 consecutive gold
eb2b4f91 1079// if(ilayer>0 && t.GetTracklet(ilayer-1) && ptrTracklet->GetN() + t.GetTracklet(ilayer-1)->GetN() > 20) t.SetBudget(2, 0.);
41702fec 1080
1081 // Make backup of the track until is gold
b453ef55 1082 Int_t failed(0);
68f9b6bd 1083 if(!kStandAlone && (failed = t.MakeBackupTrack())) AliDebug(2, Form("Failed backup on cut[%d]", failed));
9e85cb05 1084
053767a4 1085 } // end layers loop
eb2b4f91 1086 //printf("clusters[%d] chi2[%f] x[%f] status[%d ", n, t.GetChi2(), t.GetX(), t.GetStatusTRD());
1087 //for(int i=0; i<6; i++) printf("%d ", t.GetStatusTRD(i)); printf("]\n");
41702fec 1088
9dcc64cc 1089 if(n && debugLevel > 1){
1090 //Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
eb2b4f91 1091 AliTRDtrackV1 track(t);
1092 track.SetOwner();
9dcc64cc 1093 (*cstreamer) << "FollowBackProlongation2"
1094 << "EventNumber=" << fEventInFile
eb2b4f91 1095 << "track.=" << &track
41702fec 1096 << "\n";
1097 }
1098
eb2b4f91 1099 return n;
0906e73e 1100}
1101
eb38ed55 1102//_________________________________________________________________________
4d6aee34 1103Float_t AliTRDtrackerV1::FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *const planes){
41702fec 1104 //
1105 // Fits a Riemann-circle to the given points without tilting pad correction.
1106 // The fit is performed using an instance of the class AliRieman (equations
1107 // and transformations see documentation of this class)
1108 // Afterwards all the tracklets are Updated
1109 //
1110 // Parameters: - Array of tracklets (AliTRDseedV1)
1111 // - Storage for the chi2 values (beginning with direction z)
1112 // - Seeding configuration
1113 // Output: - The curvature
1114 //
1115 AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter();
1116 fitter->Reset();
1117 Int_t allplanes[] = {0, 1, 2, 3, 4, 5};
1118 Int_t *ppl = &allplanes[0];
1119 Int_t maxLayers = 6;
1120 if(planes){
1121 maxLayers = 4;
1122 ppl = planes;
1123 }
1124 for(Int_t il = 0; il < maxLayers; il++){
1125 if(!tracklets[ppl[il]].IsOK()) continue;
e3cf3d02 1126 fitter->AddPoint(tracklets[ppl[il]].GetX0(), tracklets[ppl[il]].GetYfit(0), tracklets[ppl[il]].GetZfit(0),1,10);
41702fec 1127 }
1128 fitter->Update();
1129 // Set the reference position of the fit and calculate the chi2 values
1130 memset(chi2, 0, sizeof(Double_t) * 2);
1131 for(Int_t il = 0; il < maxLayers; il++){
1132 // Reference positions
1133 tracklets[ppl[il]].Init(fitter);
1134
1135 // chi2
1136 if((!tracklets[ppl[il]].IsOK()) && (!planes)) continue;
1137 chi2[0] += tracklets[ppl[il]].GetChi2Y();
1138 chi2[1] += tracklets[ppl[il]].GetChi2Z();
1139 }
1140 return fitter->GetC();
eb38ed55 1141}
1142
1143//_________________________________________________________________________
1144void AliTRDtrackerV1::FitRieman(AliTRDcluster **seedcl, Double_t chi2[2])
1145{
41702fec 1146 //
1147 // Performs a Riemann helix fit using the seedclusters as spacepoints
1148 // Afterwards the chi2 values are calculated and the seeds are updated
1149 //
1150 // Parameters: - The four seedclusters
1151 // - The tracklet array (AliTRDseedV1)
1152 // - The seeding configuration
1153 // - Chi2 array
1154 //
1155 // debug level 2
1156 //
1157 AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter();
1158 fitter->Reset();
a3743898 1159 for(Int_t i = 0; i < 4; i++){
a3743898 1160 fitter->AddPoint(seedcl[i]->GetX(), seedcl[i]->GetY(), seedcl[i]->GetZ(), 1., 10.);
1161 }
41702fec 1162 fitter->Update();
1163
1164
1165 // Update the seed and calculated the chi2 value
1166 chi2[0] = 0; chi2[1] = 0;
1167 for(Int_t ipl = 0; ipl < kNSeedPlanes; ipl++){
1168 // chi2
1169 chi2[0] += (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX()));
1170 chi2[1] += (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX()));
1171 }
eb38ed55 1172}
1173
1174
1175//_________________________________________________________________________
1176Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex)
1177{
41702fec 1178 //
1179 // Fits a helix to the clusters. Pad tilting is considered. As constraint it is
1180 // assumed that the vertex position is set to 0.
1181 // This method is very usefull for high-pt particles
1182 // Basis for the fit: (x - x0)^2 + (y - y0)^2 - R^2 = 0
1183 // x0, y0: Center of the circle
1184 // Measured y-position: ymeas = y - tan(phiT)(zc - zt)
1185 // zc: center of the pad row
1186 // Equation which has to be fitted (after transformation):
1187 // a + b * u + e * v + 2*(ymeas + tan(phiT)(z - zVertex))*t = 0
1188 // Transformation:
1189 // t = 1/(x^2 + y^2)
1190 // u = 2 * x * t
1191 // v = 2 * x * tan(phiT) * t
1192 // Parameters in the equation:
1193 // a = -1/y0, b = x0/y0, e = dz/dx
1194 //
1195 // The Curvature is calculated by the following equation:
1196 // - curv = a/Sqrt(b^2 + 1) = 1/R
1197 // Parameters: - the 6 tracklets
1198 // - the Vertex constraint
1199 // Output: - the Chi2 value of the track
1200 //
1201 // debug level 5
1202 //
1203
1204 TLinearFitter *fitter = GetTiltedRiemanFitterConstraint();
1205 fitter->StoreData(kTRUE);
1206 fitter->ClearPoints();
4d6aee34 1207 AliTRDcluster *cl = NULL;
41702fec 1208
1209 Float_t x, y, z, w, t, error, tilt;
1210 Double_t uvt[2];
1211 Int_t nPoints = 0;
053767a4 1212 for(Int_t ilr = 0; ilr < AliTRDgeometry::kNlayer; ilr++){
1213 if(!tracklets[ilr].IsOK()) continue;
8d2bec9e 1214 for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){
053767a4 1215 if(!tracklets[ilr].IsUsable(itb)) continue;
e7542a7e 1216 if(!(cl = tracklets[ilr].GetClusters(itb))) continue;
1742f24c 1217 if(!cl->IsInChamber()) continue;
41702fec 1218 x = cl->GetX();
1219 y = cl->GetY();
1220 z = cl->GetZ();
053767a4 1221 tilt = tracklets[ilr].GetTilt();
41702fec 1222 // Transformation
1223 t = 1./(x * x + y * y);
1224 uvt[0] = 2. * x * t;
1225 uvt[1] = 2. * x * t * tilt ;
1226 w = 2. * (y + tilt * (z - zVertex)) * t;
78b7d24c 1227 error = 2. * TMath::Sqrt(cl->GetSigmaY2()+tilt*tilt*cl->GetSigmaZ2()) * t;
41702fec 1228 fitter->AddPoint(uvt, w, error);
1229 nPoints++;
1230 }
1231 }
e17f4785 1232 fitter->Eval();
41702fec 1233
1234 // Calculate curvature
1235 Double_t a = fitter->GetParameter(0);
1236 Double_t b = fitter->GetParameter(1);
1237 Double_t curvature = a/TMath::Sqrt(b*b + 1);
1238
ce42378b 1239 Float_t chi2track = 0.0;
1240 if (nPoints > 0) {
1241 chi2track = fitter->GetChisquare()/Double_t(nPoints);
1242 }
41702fec 1243 for(Int_t ip = 0; ip < AliTRDtrackerV1::kNPlanes; ip++)
68f9b6bd 1244 tracklets[ip].SetC(curvature, 1);
1245
1246 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>3) printf("D-AliTRDtrackerV1::FitTiltedRiemanConstraint: Chi2[%f] C[%5.2e] pt[%8.3f]\n", chi2track, curvature, GetBz()*kB2C/curvature);
41702fec 1247
a2fbb6ec 1248/* if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker()) >= 5){
41702fec 1249 //Linear Model on z-direction
1250 Double_t xref = CalculateReferenceX(tracklets); // Relative to the middle of the stack
1251 Double_t slope = fitter->GetParameter(2);
1252 Double_t zref = slope * xref;
1253 Float_t chi2Z = CalculateChi2Z(tracklets, zref, slope, xref);
1254 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
1255 Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
4d6aee34 1256 TTreeSRedirector &treeStreamer = *fkReconstructor->GetDebugStream(AliTRDReconstructor::kTracker);
41702fec 1257 treeStreamer << "FitTiltedRiemanConstraint"
1258 << "EventNumber=" << eventNumber
1259 << "CandidateNumber=" << candidateNumber
1260 << "Curvature=" << curvature
1261 << "Chi2Track=" << chi2track
1262 << "Chi2Z=" << chi2Z
1263 << "zref=" << zref
1264 << "\n";
3a039a31 1265 }*/
41702fec 1266 return chi2track;
eb38ed55 1267}
1268
1269//_________________________________________________________________________
1270Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError)
1271{
41702fec 1272 //
1273 // Performs a Riemann fit taking tilting pad correction into account
1274 // The equation of a Riemann circle, where the y position is substituted by the
1275 // measured y-position taking pad tilting into account, has to be transformed
1276 // into a 4-dimensional hyperplane equation
1277 // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0
1278 // Measured y-Position: ymeas = y - tan(phiT)(zc - zt)
1279 // zc: center of the pad row
1280 // zt: z-position of the track
1281 // The z-position of the track is assumed to be linear dependent on the x-position
1282 // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0
1283 // Transformation: u = 2 * x * t
1284 // v = 2 * tan(phiT) * t
1285 // w = 2 * tan(phiT) * (x - xref) * t
1286 // t = 1 / (x^2 + ymeas^2)
1287 // Parameters: a = -1/y0
1288 // b = x0/y0
1289 // c = (R^2 -x0^2 - y0^2)/y0
1290 // d = offset
1291 // e = dz/dx
1292 // If the offset respectively the slope in z-position is impossible, the parameters are fixed using
1293 // results from the simple riemann fit. Afterwards the fit is redone.
1294 // The curvature is calculated according to the formula:
1295 // curv = a/(1 + b^2 + c*a) = 1/R
1296 //
1297 // Paramters: - Array of tracklets (connected to the track candidate)
1298 // - Flag selecting the error definition
1299 // Output: - Chi2 values of the track (in Parameter list)
1300 //
1301 TLinearFitter *fitter = GetTiltedRiemanFitter();
1302 fitter->StoreData(kTRUE);
1303 fitter->ClearPoints();
1304 AliTRDLeastSquare zfitter;
4d6aee34 1305 AliTRDcluster *cl = NULL;
41702fec 1306
1307 Double_t xref = CalculateReferenceX(tracklets);
6e39bde4 1308 Double_t x, y, z, t, tilt, dx, w, we, erry, errz;
1309 Double_t uvt[4], sumPolY[5], sumPolZ[3];
1310 memset(sumPolY, 0, sizeof(Double_t) * 5);
1311 memset(sumPolZ, 0, sizeof(Double_t) * 3);
41702fec 1312 Int_t nPoints = 0;
1313 // Containers for Least-square fitter
1314 for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
1315 if(!tracklets[ipl].IsOK()) continue;
ed15ef4f 1316 tilt = tracklets[ipl].GetTilt();
8d2bec9e 1317 for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){
41702fec 1318 if(!(cl = tracklets[ipl].GetClusters(itb))) continue;
1742f24c 1319 if(!cl->IsInChamber()) continue;
c79857d5 1320 if (!tracklets[ipl].IsUsable(itb)) continue;
41702fec 1321 x = cl->GetX();
1322 y = cl->GetY();
1323 z = cl->GetZ();
41702fec 1324 dx = x - xref;
1325 // Transformation
1326 t = 1./(x*x + y*y);
1327 uvt[0] = 2. * x * t;
1328 uvt[1] = t;
1329 uvt[2] = 2. * tilt * t;
1330 uvt[3] = 2. * tilt * dx * t;
1331 w = 2. * (y + tilt*z) * t;
1332 // error definition changes for the different calls
1333 we = 2. * t;
78b7d24c 1334 we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()+tilt*tilt*cl->GetSigmaZ2()) : 0.2;
41702fec 1335 fitter->AddPoint(uvt, w, we);
1336 zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2())));
6e39bde4 1337 // adding points for covariance matrix estimation
1338 erry = 1./(TMath::Sqrt(cl->GetSigmaY2()) + 0.1); // 0.1 is a systematic error (due to misalignment and miscalibration)
1339 erry *= erry;
1340 errz = 1./cl->GetSigmaZ2();
1341 for(Int_t ipol = 0; ipol < 5; ipol++){
1342 sumPolY[ipol] += erry;
1343 erry *= x;
1344 if(ipol < 3){
1345 sumPolZ[ipol] += errz;
1346 errz *= x;
1347 }
1348 }
41702fec 1349 nPoints++;
1350 }
1351 }
c08b1cc7 1352 if (fitter->Eval()) return 1.e10;
41702fec 1353 zfitter.Eval();
1354
1355 Double_t offset = fitter->GetParameter(3);
1356 Double_t slope = fitter->GetParameter(4);
1357
1358 // Linear fitter - not possible to make boundaries
1359 // Do not accept non possible z and dzdx combinations
1360 Bool_t acceptablez = kTRUE;
1361 Double_t zref = 0.0;
1362 for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) {
1363 if(!tracklets[iLayer].IsOK()) continue;
1364 zref = offset + slope * (tracklets[iLayer].GetX0() - xref);
e3cf3d02 1365 if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0)
41702fec 1366 acceptablez = kFALSE;
1367 }
1368 if (!acceptablez) {
1369 Double_t dzmf = zfitter.GetFunctionParameter(1);
1370 Double_t zmf = zfitter.GetFunctionValue(&xref);
1371 fgTiltedRieman->FixParameter(3, zmf);
1372 fgTiltedRieman->FixParameter(4, dzmf);
e17f4785 1373 fitter->Eval();
41702fec 1374 fitter->ReleaseParameter(3);
1375 fitter->ReleaseParameter(4);
1376 offset = fitter->GetParameter(3);
1377 slope = fitter->GetParameter(4);
1378 }
1379
1380 // Calculate Curvarture
1381 Double_t a = fitter->GetParameter(0);
1382 Double_t b = fitter->GetParameter(1);
1383 Double_t c = fitter->GetParameter(2);
1384 Double_t curvature = 1.0 + b*b - c*a;
68f9b6bd 1385 if (curvature > 0.0) curvature = a / TMath::Sqrt(curvature);
41702fec 1386
1387 Double_t chi2track = fitter->GetChisquare()/Double_t(nPoints);
1388
6e39bde4 1389 // Prepare error calculation
1390 TMatrixD covarPolY(3,3);
1391 covarPolY(0,0) = sumPolY[0]; covarPolY(1,1) = sumPolY[2]; covarPolY(2,2) = sumPolY[4];
1392 covarPolY(0,1) = covarPolY(1,0) = sumPolY[1];
1393 covarPolY(0,2) = covarPolY(2,0) = sumPolY[2];
1394 covarPolY(2,1) = covarPolY(1,2) = sumPolY[3];
1395 covarPolY.Invert();
1396 TMatrixD covarPolZ(2,2);
1397 covarPolZ(0,0) = sumPolZ[0]; covarPolZ(1,1) = sumPolZ[2];
1398 covarPolZ(1,0) = covarPolZ(0,1) = sumPolZ[1];
1399 covarPolZ.Invert();
1400
41702fec 1401 // Update the tracklets
d2eba04b 1402 Double_t dy, dz;
6e39bde4 1403 Double_t cov[15];
1404 memset(cov, 0, sizeof(Double_t) * 15);
41702fec 1405 for(Int_t iLayer = 0; iLayer < AliTRDtrackerV1::kNPlanes; iLayer++) {
1406
1407 x = tracklets[iLayer].GetX0();
d2eba04b 1408// x1 = x - xref;
41702fec 1409 y = 0;
1410 z = 0;
1411 dy = 0;
1412 dz = 0;
6e39bde4 1413 memset(cov, 0, sizeof(Double_t) * 3);
1414 TMatrixD transform(3,3);
1415 transform(0,0) = 1;
1416 transform(0,1) = x;
1417 transform(0,2) = x*x;
1418 transform(1,1) = 1;
1419 transform(1,2) = x;
1420 transform(2,2) = 1;
1421 TMatrixD covariance(transform, TMatrixD::kMult, covarPolY);
1422 covariance *= transform.T();
1423 TMatrixD transformZ(2,2);
1424 transformZ(0,0) = transformZ(1,1) = 1;
1425 transformZ(0,1) = x;
1426 TMatrixD covarZ(transformZ, TMatrixD::kMult, covarPolZ);
1427 covarZ *= transformZ.T();
41702fec 1428 // y: R^2 = (x - x0)^2 + (y - y0)^2
1429 // => y = y0 +/- Sqrt(R^2 - (x - x0)^2)
1430 // R = Sqrt() = 1/Curvature
1431 // => y = y0 +/- Sqrt(1/Curvature^2 - (x - x0)^2)
1432 Double_t res = (x * a + b); // = (x - x0)/y0
1433 res *= res;
1434 res = 1.0 - c * a + b * b - res; // = (R^2 - (x - x0)^2)/y0^2
1435 if (res >= 0) {
1436 res = TMath::Sqrt(res);
1437 y = (1.0 - res) / a;
1438 }
6e39bde4 1439 cov[0] = covariance(0,0);
1440 cov[2] = covarZ(0,0);
1441 cov[1] = 0.;
41702fec 1442
1443 // dy: R^2 = (x - x0)^2 + (y - y0)^2
1444 // => y = +/- Sqrt(R^2 - (x - x0)^2) + y0
1445 // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2)
1446 // Curvature: cr = 1/R = a/Sqrt(1 + b^2 - c*a)
1447 // => dy/dx = (x - x0)/(1/(cr^2) - (x - x0)^2)
1448 Double_t x0 = -b / a;
1449 if (-c * a + b * b + 1 > 0) {
1450 if (1.0/(curvature * curvature) - (x - x0) * (x - x0) > 0.0) {
6e39bde4 1451 Double_t yderiv = (x - x0) / TMath::Sqrt(1.0/(curvature * curvature) - (x - x0) * (x - x0));
1452 if (a < 0) yderiv *= -1.0;
1453 dy = yderiv;
41702fec 1454 }
1455 }
1456 z = offset + slope * (x - xref);
1457 dz = slope;
1458 tracklets[iLayer].SetYref(0, y);
1459 tracklets[iLayer].SetYref(1, dy);
1460 tracklets[iLayer].SetZref(0, z);
1461 tracklets[iLayer].SetZref(1, dz);
1462 tracklets[iLayer].SetC(curvature);
6e39bde4 1463 tracklets[iLayer].SetCovRef(cov);
41702fec 1464 tracklets[iLayer].SetChi2(chi2track);
1465 }
68f9b6bd 1466 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>3) printf("D-AliTRDtrackerV1::FitTiltedRieman: Chi2[%f] C[%5.2e] pt[%8.3f]\n", chi2track, curvature, GetBz()*kB2C/curvature);
41702fec 1467
a2fbb6ec 1468/* if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >=5){
1469 TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
41702fec 1470 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
1471 Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
1472 Double_t chi2z = CalculateChi2Z(tracklets, offset, slope, xref);
1473 cstreamer << "FitTiltedRieman0"
1474 << "EventNumber=" << eventNumber
1475 << "CandidateNumber=" << candidateNumber
1476 << "xref=" << xref
1477 << "Chi2Z=" << chi2z
1478 << "\n";
3a039a31 1479 }*/
41702fec 1480 return chi2track;
eb38ed55 1481}
1482
3b57a3f7 1483
9e333711 1484//____________________________________________________________________
6e4d4425 1485Double_t AliTRDtrackerV1::FitLine(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t err, Int_t np, AliTrackPoint *points)
9e333711 1486{
4d6aee34 1487 //
1488 // Fit track with a staight line
1489 // Fills an AliTrackPoint array with np points
1490 // Function should be used to refit tracks when no magnetic field was on
1491 //
9e333711 1492 AliTRDLeastSquare yfitter, zfitter;
4d6aee34 1493 AliTRDcluster *cl = NULL;
9e333711 1494
4d6aee34 1495 AliTRDseedV1 work[kNPlanes], *tracklet = NULL;
9e333711 1496 if(!tracklets){
1497 for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
1498 if(!(tracklet = track->GetTracklet(ipl))) continue;
1499 if(!tracklet->IsOK()) continue;
1500 new(&work[ipl]) AliTRDseedV1(*tracklet);
1501 }
1502 tracklets = &work[0];
1503 }
1504
1505 Double_t xref = CalculateReferenceX(tracklets);
1506 Double_t x, y, z, dx, ye, yr, tilt;
1507 for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
1508 if(!tracklets[ipl].IsOK()) continue;
1509 for(Int_t itb = 0; itb < fgNTimeBins; itb++){
1510 if(!(cl = tracklets[ipl].GetClusters(itb))) continue;
1511 if (!tracklets[ipl].IsUsable(itb)) continue;
1512 x = cl->GetX();
1513 z = cl->GetZ();
1514 dx = x - xref;
1515 zfitter.AddPoint(&dx, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2())));
1516 }
1517 }
1518 zfitter.Eval();
1519 Double_t z0 = zfitter.GetFunctionParameter(0);
1520 Double_t dzdx = zfitter.GetFunctionParameter(1);
1521 for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
1522 if(!tracklets[ipl].IsOK()) continue;
1523 for(Int_t itb = 0; itb < fgNTimeBins; itb++){
1524 if(!(cl = tracklets[ipl].GetClusters(itb))) continue;
1525 if (!tracklets[ipl].IsUsable(itb)) continue;
1526 x = cl->GetX();
1527 y = cl->GetY();
1528 z = cl->GetZ();
1529 tilt = tracklets[ipl].GetTilt();
1530 dx = x - xref;
1531 yr = y + tilt*(z - z0 - dzdx*dx);
1532 // error definition changes for the different calls
1533 ye = tilt*TMath::Sqrt(cl->GetSigmaZ2());
1534 ye += err ? tracklets[ipl].GetSigmaY() : 0.2;
1535 yfitter.AddPoint(&dx, yr, ye);
1536 }
1537 }
1538 yfitter.Eval();
1539 Double_t y0 = yfitter.GetFunctionParameter(0);
1540 Double_t dydx = yfitter.GetFunctionParameter(1);
1541 Double_t chi2 = 0.;//yfitter.GetChisquare()/Double_t(nPoints);
1542
1543 //update track points array
1544 if(np && points){
1545 Float_t xyz[3];
1546 for(int ip=0; ip<np; ip++){
1547 points[ip].GetXYZ(xyz);
1548 xyz[1] = y0 + dydx * (xyz[0] - xref);
1549 xyz[2] = z0 + dzdx * (xyz[0] - xref);
1550 points[ip].SetXYZ(xyz);
1551 }
1552 }
1553 return chi2;
1554}
1555
1556
3b57a3f7 1557//_________________________________________________________________________
6e4d4425 1558Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t sigError, Int_t np, AliTrackPoint *points)
3b57a3f7 1559{
0fa1a8ee 1560//
1561// Performs a Riemann fit taking tilting pad correction into account
1562//
1563// Paramters: - Array of tracklets (connected to the track candidate)
1564// - Flag selecting the error definition
1565// Output: - Chi2 values of the track (in Parameter list)
1566//
1567// The equations which has to be solved simultaneously are:
1568// BEGIN_LATEX
1569// R^{2} = (x-x_{0})^{2} + (y^{*}-y_{0})^{2}
1570// y^{*} = y - tg(h)(z - z_{t})
1571// z_{t} = z_{0}+dzdx*(x-x_{r})
1572// END_LATEX
1573// with (x, y, z) the coordinate of the cluster, (x_0, y_0, z_0) the coordinate of the center of the Riemann circle,
1574// R its radius, x_r a constant refrence radial position in the middle of the TRD stack and dzdx the slope of the
1575// track in the x-z plane. Using the following transformations
1576// BEGIN_LATEX
1577// t = 1 / (x^{2} + y^{2})
1578// u = 2 * x * t
1579// v = 2 * tan(h) * t
1580// w = 2 * tan(h) * (x - x_{r}) * t
1581// END_LATEX
1582// One gets the following linear equation
1583// BEGIN_LATEX
1584// a + b * u + c * t + d * v + e * w = 2 * (y + tg(h) * z) * t
1585// END_LATEX
1586// where the coefficients have the following meaning
1587// BEGIN_LATEX
1588// a = -1/y_{0}
1589// b = x_{0}/y_{0}
1590// c = (R^{2} -x_{0}^{2} - y_{0}^{2})/y_{0}
1591// d = z_{0}
1592// e = dz/dx
1593// END_LATEX
1594// The error calculation for the free term is thus
1595// BEGIN_LATEX
1596// #sigma = 2 * #sqrt{#sigma^{2}_{y} + (tilt corr ...) + tg^{2}(h) * #sigma^{2}_{z}} * t
1597// END_LATEX
1598//
1599// From this simple model one can compute chi^2 estimates and a rough approximation of pt from the curvature according
1600// to the formula:
1601// BEGIN_LATEX
1602// C = 1/R = a/(1 + b^{2} + c*a)
1603// END_LATEX
1604//
1605// Authors
1606// M.Ivanov <M.Ivanov@gsi.de>
1607// A.Bercuci <A.Bercuci@gsi.de>
1608// M.Fasel <M.Fasel@gsi.de>
1609
41702fec 1610 TLinearFitter *fitter = GetTiltedRiemanFitter();
1611 fitter->StoreData(kTRUE);
1612 fitter->ClearPoints();
1613 AliTRDLeastSquare zfitter;
4d6aee34 1614 AliTRDcluster *cl = NULL;
3b57a3f7 1615
4d6aee34 1616 AliTRDseedV1 work[kNPlanes], *tracklet = NULL;
3b57a3f7 1617 if(!tracklets){
1618 for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
1619 if(!(tracklet = track->GetTracklet(ipl))) continue;
1620 if(!tracklet->IsOK()) continue;
1621 new(&work[ipl]) AliTRDseedV1(*tracklet);
1622 }
1623 tracklets = &work[0];
1624 }
1625
41702fec 1626 Double_t xref = CalculateReferenceX(tracklets);
68f9b6bd 1627 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>3) printf("D-AliTRDtrackerV1::FitRiemanTilt:\nx0[(0)%6.2f (1)%6.2f (2)%6.2f (3)%6.2f (4)%6.2f (5)%6.2f] xref[%6.2f]", tracklets[0].GetX0(), tracklets[1].GetX0(), tracklets[2].GetX0(), tracklets[3].GetX0(), tracklets[4].GetX0(), tracklets[5].GetX0(), xref);
41702fec 1628 Double_t x, y, z, t, tilt, dx, w, we;
1629 Double_t uvt[4];
1630 Int_t nPoints = 0;
1631 // Containers for Least-square fitter
1632 for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
1633 if(!tracklets[ipl].IsOK()) continue;
8d2bec9e 1634 for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){
41702fec 1635 if(!(cl = tracklets[ipl].GetClusters(itb))) continue;
352cef8f 1636 //if (!tracklets[ipl].IsUsable(itb)) continue;
41702fec 1637 x = cl->GetX();
1638 y = cl->GetY();
1639 z = cl->GetZ();
1640 tilt = tracklets[ipl].GetTilt();
1641 dx = x - xref;
1642 // Transformation
1643 t = 1./(x*x + y*y);
1644 uvt[0] = 2. * x * t;
1645 uvt[1] = t;
1646 uvt[2] = 2. * tilt * t;
1647 uvt[3] = 2. * tilt * dx * t;
1648 w = 2. * (y + tilt*z) * t;
1649 // error definition changes for the different calls
1650 we = 2. * t;
f29f13a6 1651 we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()) : 0.2;
41702fec 1652 fitter->AddPoint(uvt, w, we);
1653 zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2())));
1654 nPoints++;
1655 }
1656 }
aec26713 1657 if(fitter->Eval()) return 1.E10;
1658
41702fec 1659 Double_t z0 = fitter->GetParameter(3);
1660 Double_t dzdx = fitter->GetParameter(4);
3b57a3f7 1661
1662
1663 // Linear fitter - not possible to make boundaries
1664 // Do not accept non possible z and dzdx combinations
1665 Bool_t accept = kTRUE;
1666 Double_t zref = 0.0;
1667 for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) {
1668 if(!tracklets[iLayer].IsOK()) continue;
1669 zref = z0 + dzdx * (tracklets[iLayer].GetX0() - xref);
e3cf3d02 1670 if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0)
3b57a3f7 1671 accept = kFALSE;
1672 }
1673 if (!accept) {
41702fec 1674 zfitter.Eval();
3b57a3f7 1675 Double_t dzmf = zfitter.GetFunctionParameter(1);
1676 Double_t zmf = zfitter.GetFunctionValue(&xref);
1677 fitter->FixParameter(3, zmf);
1678 fitter->FixParameter(4, dzmf);
e17f4785 1679 fitter->Eval();
3b57a3f7 1680 fitter->ReleaseParameter(3);
1681 fitter->ReleaseParameter(4);
1682 z0 = fitter->GetParameter(3); // = zmf ?
1683 dzdx = fitter->GetParameter(4); // = dzmf ?
1684 }
1685
1686 // Calculate Curvature
1687 Double_t a = fitter->GetParameter(0);
1688 Double_t b = fitter->GetParameter(1);
1689 Double_t c = fitter->GetParameter(2);
1690 Double_t y0 = 1. / a;
1691 Double_t x0 = -b * y0;
a015e406 1692 Double_t tmp = y0*y0 + x0*x0 - c*y0;
1693 if(tmp<=0.) return 1.E10;
4d6aee34 1694 Double_t radius = TMath::Sqrt(tmp);
1695 Double_t curvature = 1.0 + b*b - c*a;
1696 if (curvature > 0.0) curvature = a / TMath::Sqrt(curvature);
3b57a3f7 1697
1698 // Calculate chi2 of the fit
1699 Double_t chi2 = fitter->GetChisquare()/Double_t(nPoints);
68f9b6bd 1700 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>3) printf("D-AliTRDtrackerV1::FitRiemanTilt:x0[%6.2f] y0[%6.2f] R[%6.2f] chi2[%f]\n", x0, y0, radius, chi2);
3b57a3f7 1701
1702 // Update the tracklets
1703 if(!track){
1704 for(Int_t ip = 0; ip < kNPlanes; ip++) {
1705 x = tracklets[ip].GetX0();
4d6aee34 1706 tmp = radius*radius-(x-x0)*(x-x0);
a015e406 1707 if(tmp <= 0.) continue;
1708 tmp = TMath::Sqrt(tmp);
3b57a3f7 1709
1710 // y: R^2 = (x - x0)^2 + (y - y0)^2
1711 // => y = y0 +/- Sqrt(R^2 - (x - x0)^2)
1712 tracklets[ip].SetYref(0, y0 - (y0>0.?1.:-1)*tmp);
1713 // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2)
1714 tracklets[ip].SetYref(1, (x - x0) / tmp);
1715 tracklets[ip].SetZref(0, z0 + dzdx * (x - xref));
1716 tracklets[ip].SetZref(1, dzdx);
4d6aee34 1717 tracklets[ip].SetC(curvature);
3b57a3f7 1718 tracklets[ip].SetChi2(chi2);
1719 }
1720 }
3b57a3f7 1721 //update track points array
1722 if(np && points){
1723 Float_t xyz[3];
1724 for(int ip=0; ip<np; ip++){
1725 points[ip].GetXYZ(xyz);
4d6aee34 1726 xyz[1] = TMath::Abs(xyz[0] - x0) > radius ? 100. : y0 - (y0>0.?1.:-1.)*TMath::Sqrt((radius-(xyz[0]-x0))*(radius+(xyz[0]-x0)));
3b57a3f7 1727 xyz[2] = z0 + dzdx * (xyz[0] - xref);
1728 points[ip].SetXYZ(xyz);
1729 }
1730 }
1731
3b57a3f7 1732 return chi2;
1733}
1734
1735
1bf51039 1736//____________________________________________________________________
e17f4785 1737Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 * const tracklets, Bool_t up, Int_t np, AliTrackPoint *points)
1bf51039 1738{
1739// Kalman filter implementation for the TRD.
1740// It returns the positions of the fit in the array "points"
1741//
1742// Author : A.Bercuci@gsi.de
1743
3cfaffa4 1744 // printf("Start track @ x[%f]\n", track->GetX());
1bf51039 1745
1746 //prepare marker points along the track
1747 Int_t ip = np ? 0 : 1;
1748 while(ip<np){
1749 if((up?-1:1) * (track->GetX() - points[ip].GetX()) > 0.) break;
1750 //printf("AliTRDtrackerV1::FitKalman() : Skip track marker x[%d] = %7.3f. Before track start ( %7.3f ).\n", ip, points[ip].GetX(), track->GetX());
1751 ip++;
1752 }
1753 //if(points) printf("First marker point @ x[%d] = %f\n", ip, points[ip].GetX());
1754
1755
d8069611 1756 AliTRDseedV1 tracklet;
1757 AliTRDseedV1 *ptrTracklet = NULL;
1bf51039 1758
1759 //Loop through the TRD planes
1760 for (Int_t jplane = 0; jplane < kNPlanes; jplane++) {
1761 // GET TRACKLET OR BUILT IT
1762 Int_t iplane = up ? jplane : kNPlanes - 1 - jplane;
1763 if(tracklets){
e17f4785 1764 if(!(ptrTracklet = &tracklets[iplane])) continue;
1bf51039 1765 }else{
1766 if(!(ptrTracklet = track->GetTracklet(iplane))){
4d6aee34 1767 /*AliTRDtrackerV1 *tracker = NULL;
a2fbb6ec 1768 if(!(tracker = dynamic_cast<AliTRDtrackerV1*>( AliTRDrecoParam:Tracker()))) continue;
1bf51039 1769 ptrTracklet = new(&tracklet) AliTRDseedV1(iplane);
1770 if(!tracker->MakeTracklet(ptrTracklet, track)) */
1771 continue;
1772 }
1773 }
1774 if(!ptrTracklet->IsOK()) continue;
1775
1776 Double_t x = ptrTracklet->GetX0();
1777
1778 while(ip < np){
1779 //don't do anything if next marker is after next update point.
952051c5 1780 if((up?-1:1) * (points[ip].GetX() - x) - AliTRDReconstructor::GetMaxStep() < 0) break;
1781 if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), AliTRDReconstructor::GetMaxStep())) return -1.;
1bf51039 1782
1783 Double_t xyz[3]; // should also get the covariance
3cfaffa4 1784 track->GetXYZ(xyz);
1785 track->Global2LocalPosition(xyz, track->GetAlpha());
1786 points[ip].SetXYZ(xyz[0], xyz[1], xyz[2]);
1bf51039 1787 ip++;
1788 }
3cfaffa4 1789 // printf("plane[%d] tracklet[%p] x[%f]\n", iplane, ptrTracklet, x);
1bf51039 1790
3cfaffa4 1791 // Propagate closer to the next update point
952051c5 1792 if(((up?-1:1) * (x - track->GetX()) + AliTRDReconstructor::GetMaxStep() < 0) && !PropagateToX(*track, x + (up?-1:1)*AliTRDReconstructor::GetMaxStep(), AliTRDReconstructor::GetMaxStep())) return -1.;
1bf51039 1793
1794 if(!AdjustSector(track)) return -1;
952051c5 1795 if(TMath::Abs(track->GetSnp()) > AliTRDReconstructor::GetMaxSnp()) return -1;
1bf51039 1796
1797 //load tracklet to the tracker and the track
1798/* Int_t index;
1799 if((index = FindTracklet(ptrTracklet)) < 0){
1800 ptrTracklet = SetTracklet(&tracklet);
1801 index = fTracklets->GetEntriesFast()-1;
1802 }
1803 track->SetTracklet(ptrTracklet, index);*/
1804
1805
1806 // register tracklet to track with tracklet creation !!
1807 // PropagateBack : loaded tracklet to the tracker and update index
1808 // RefitInward : update index
1809 // MakeTrack : loaded tracklet to the tracker and update index
1810 if(!tracklets) track->SetTracklet(ptrTracklet, -1);
1811
1812
1813 //Calculate the mean material budget along the path inside the chamber
1814 Double_t xyz0[3]; track->GetXYZ(xyz0);
1815 Double_t alpha = track->GetAlpha();
1816 Double_t xyz1[3], y, z;
1817 if(!track->GetProlongation(x, y, z)) return -1;
1818 xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha);
1819 xyz1[1] = +x * TMath::Sin(alpha) + y * TMath::Cos(alpha);
1820 xyz1[2] = z;
fbe11be7 1821 if(TMath::Abs(xyz0[0] - xyz1[0]) < 1e-3 && TMath::Abs(xyz0[1] - xyz1[1]) < 1e-3) continue; // check wheter we are at the same global x position
1bf51039 1822 Double_t param[7];
3cfaffa4 1823 if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param) <=0.) break;
1bf51039 1824 Double_t xrho = param[0]*param[4]; // density*length
1825 Double_t xx0 = param[1]; // radiation length
1826
1827 //Propagate the track
1828 track->PropagateTo(x, xx0, xrho);
1829 if (!AdjustSector(track)) break;
1830
1831 //Update track
b72f4eaf 1832 Double_t cov[3]; ptrTracklet->GetCovAt(x, cov);
1833 Double_t p[2] = { ptrTracklet->GetY(), ptrTracklet->GetZ()};
1834 Double_t chi2 = ((AliExternalTrackParam*)track)->GetPredictedChi2(p, cov);
ef867f55 1835 if(chi2<1e+10) ((AliExternalTrackParam*)track)->Update(p, cov);
1bf51039 1836 if(!up) continue;
1837
1838 //Reset material budget if 2 consecutive gold
1839 if(iplane>0 && track->GetTracklet(iplane-1) && ptrTracklet->GetN() + track->GetTracklet(iplane-1)->GetN() > 20) track->SetBudget(2, 0.);
1840 } // end planes loop
1841
1842 // extrapolation
1843 while(ip < np){
952051c5 1844 if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), AliTRDReconstructor::GetMaxStep())) return -1.;
1bf51039 1845
1846 Double_t xyz[3]; // should also get the covariance
3cfaffa4 1847 track->GetXYZ(xyz);
1848 track->Global2LocalPosition(xyz, track->GetAlpha());
1849 points[ip].SetXYZ(xyz[0], xyz[1], xyz[2]);
1bf51039 1850 ip++;
1851 }
1852
1853 return track->GetChi2();
1854}
3b57a3f7 1855
eb38ed55 1856//_________________________________________________________________________
d8069611 1857Float_t AliTRDtrackerV1::CalculateChi2Z(const AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref)
eb38ed55 1858{
41702fec 1859 //
1860 // Calculates the chi2-value of the track in z-Direction including tilting pad correction.
1861 // A linear dependence on the x-value serves as a model.
1862 // The parameters are related to the tilted Riemann fit.
1863 // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate
1864 // - the offset for the reference x
1865 // - the slope
1866 // - the reference x position
1867 // Output: - The Chi2 value of the track in z-Direction
1868 //
1869 Float_t chi2Z = 0, nLayers = 0;
053767a4 1870 for (Int_t iLayer = 0; iLayer < AliTRDgeometry::kNlayer; iLayer++) {
41702fec 1871 if(!tracklets[iLayer].IsOK()) continue;
1872 Double_t z = offset + slope * (tracklets[iLayer].GetX0() - xref);
e3cf3d02 1873 chi2Z += TMath::Abs(tracklets[iLayer].GetZfit(0) - z);
41702fec 1874 nLayers++;
1875 }
1876 chi2Z /= TMath::Max((nLayers - 3.0),1.0);
1877 return chi2Z;
eb38ed55 1878}
1879
bccda319 1880//_____________________________________________________________________________
1881Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep)
1882{
41702fec 1883 //
1884 // Starting from current X-position of track <t> this function
829e9a79 1885 // extrapolates the track up to radial position <xToGo> in steps of <maxStep>.
41702fec 1886 // Returns 1 if track reaches the plane, and 0 otherwise
1887 //
bccda319 1888
41702fec 1889 // Current track X-position
15a2657d 1890 Double_t xpos = t.GetX()/*,
1891 mass = t.GetMass()*/;
bccda319 1892
41702fec 1893 // Direction: inward or outward
1894 Double_t dir = (xpos < xToGo) ? 1.0 : -1.0;
bccda319 1895
952051c5 1896 while (((xToGo - xpos) * dir) > AliTRDReconstructor::GetEpsilon()) {
2f4384e6 1897// printf("to go %f\n", (xToGo - xpos) * dir);
41702fec 1898 Double_t xyz0[3];
1899 Double_t xyz1[3];
1900 Double_t param[7];
1901 Double_t x;
1902 Double_t y;
1903 Double_t z;
bccda319 1904
41702fec 1905 // The next step size
1906 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
bccda319 1907
41702fec 1908 // Get the global position of the starting point
1909 t.GetXYZ(xyz0);
bccda319 1910
41702fec 1911 // X-position after next step
1912 x = xpos + step;
bccda319 1913
41702fec 1914 // Get local Y and Z at the X-position of the next step
3352b455 1915 if(t.GetProlongation(x,y,z)<0) return 0; // No prolongation possible
bccda319 1916
41702fec 1917 // The global position of the end point of this prolongation step
1918 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1919 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1920 xyz1[2] = z;
bccda319 1921
41702fec 1922 // Calculate the mean material budget between start and
1923 // end point of this prolongation step
83dea92e 1924 if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) return 0;
2f4384e6 1925
41702fec 1926 // Propagate the track to the X-position after the next step
9c87a076 1927 if (!t.PropagateTo(x, param[1], param[0]*param[4])) return 0;
bccda319 1928
15a2657d 1929/* // Correct for mean material budget
2f4384e6 1930 Double_t dEdx(0.),
1d26da6d 1931 bg(TMath::Abs(t.GetP()/mass));
2f4384e6 1932 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>=3){
1933 const char *pn[] = {"rho", "x/X0", "<A>", "<Z>", "L", "<Z/A>", "Nb"};
1934 printf("D-AliTRDtrackerV1::PropagateTo(): x[%6.2f] bg[%6.2f]\n", xpos, bg);
1935 printf(" param :: %s[%e] %s[%e] %s[%e] %s[%e] %s[%e] %s[%e] %s[%e]\n"
1936 , pn[0], param[0]
1937 , pn[1], param[1]
1938 , pn[2], param[2]
1939 , pn[3], param[3]
1940 , pn[4], param[4]
1941 , pn[5], param[5]
1942 , pn[6], param[6]);
1943 }
1944 switch(fgBB){
1945 case kSolid:
1946 dEdx = AliExternalTrackParam::BetheBlochSolid(bg);
1947 break;
1948 case kGas:
1949 dEdx = AliExternalTrackParam::BetheBlochGas(bg);
1950 break;
1951 case kGeant:
1952 { // mean exitation energy (GeV)
1953 Double_t mee = ((param[3] < 13.) ? (12. * param[3] + 7.) : (9.76 * param[3] + 58.8 * TMath::Power(param[3],-0.19))) * 1.e-9;
1954 Double_t mZA = param[5]>1.e-5?param[5]:(param[3]/param[2]);
1955 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>=3) printf("D-AliTRDtrackerV1::PropagateTo(): Mee[%e] <Z/A>[%e]\n", mee, mZA);
1956 // protect against failed calculation of rho in MeanMaterialBudget()
1957 dEdx = AliExternalTrackParam::BetheBlochGeant(bg, param[0]>1.e-6?param[0]:2.33, 0.2, 3., mee, mZA);
1958 }
1959 break;
1960 }
1961 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>=2) printf("D-AliTRDtrackerV1::PropagateTo(): dEdx(bg=%e, m=%e)= %e[GeV/cm]\n", bg, mass, dEdx);
1962 if (!t.CorrectForMeanMaterialdEdx(param[1], dir*param[0]*param[4], mass, dEdx)) return 0;
15a2657d 1963*/
41702fec 1964 // Rotate the track if necessary
e7542a7e 1965 if(!AdjustSector(&t)) return 0;
bccda319 1966
41702fec 1967 // New track X-position
1968 xpos = t.GetX();
bccda319 1969
41702fec 1970 }
bccda319 1971
41702fec 1972 return 1;
bccda319 1973
1974}
1975
eb38ed55 1976//_____________________________________________________________________________
e7542a7e 1977Bool_t AliTRDtrackerV1::ReadClusters(TTree *clusterTree)
eb38ed55 1978{
41702fec 1979 //
1980 // Reads AliTRDclusters from the file.
1981 // The names of the cluster tree and branches
1982 // should match the ones used in AliTRDclusterizer::WriteClusters()
1983 //
1984
1985 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
1986 TObjArray *clusterArray = new TObjArray(nsize+1000);
1987
1988 TBranch *branch = clusterTree->GetBranch("TRDcluster");
1989 if (!branch) {
1990 AliError("Can't get the branch !");
e7542a7e 1991 return kFALSE;
41702fec 1992 }
1993 branch->SetAddress(&clusterArray);
d2eba04b 1994
41702fec 1995 if(!fClusters){
9e85cb05 1996 Float_t nclusters = fkRecoParam->GetNClusters();
4d6aee34 1997 if(fkReconstructor->IsHLT()) nclusters /= AliTRDgeometry::kNsector;
e7542a7e 1998 fClusters = new TClonesArray("AliTRDcluster", Int_t(nclusters));
1999 fClusters->SetOwner(kTRUE);
d2eba04b 2000 SetClustersOwner();
2001 AliInfo(Form("Tracker owning clusters @ %p", (void*)fClusters));
41702fec 2002 }
2003
2004 // Loop through all entries in the tree
2005 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2006 Int_t nbytes = 0;
2007 Int_t ncl = 0;
4d6aee34 2008 AliTRDcluster *c = NULL;
41702fec 2009 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2010 // Import the tree
2011 nbytes += clusterTree->GetEvent(iEntry);
2012
2013 // Get the number of points in the detector
2014 Int_t nCluster = clusterArray->GetEntriesFast();
2015 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2016 if(!(c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster))) continue;
41702fec 2017 new((*fClusters)[ncl++]) AliTRDcluster(*c);
2018 delete (clusterArray->RemoveAt(iCluster));
2019 }
41702fec 2020 }
2021 delete clusterArray;
2022
e7542a7e 2023 return kTRUE;
eb38ed55 2024}
2025
2026//_____________________________________________________________________________
2027Int_t AliTRDtrackerV1::LoadClusters(TTree *cTree)
2028{
41702fec 2029 //
66f6bfd9 2030 // Fills clusters into TRD tracking sectors
41702fec 2031 //
41702fec 2032
9e85cb05 2033 fkRecoParam = fkReconstructor->GetRecoParam(); // load reco param for this event
2034
d2eba04b 2035// if(!fkReconstructor->IsWritingClusters()) AliInfo(Form("IsWritingClusters[%c]", fkReconstructor->IsWritingClusters()?'y':'n'));
2036 if(!(fClusters = AliTRDReconstructor::GetClusters())){
2037 AliWarning("Clusters unavailable from TRD reconstructor. Trying reading from tree ...");
48f8adf3 2038 } else {
e7542a7e 2039 if(!ReadClusters(cTree)) {
d2eba04b 2040 AliError("Reading clusters from tree failed.");
66f6bfd9 2041 return 1;
2042 }
2043 }
66f6bfd9 2044
48f8adf3 2045 if(!fClusters || !fClusters->GetEntriesFast()){
66f6bfd9 2046 AliInfo("No TRD clusters");
41702fec 2047 return 1;
d2eba04b 2048 } else AliInfo(Form("Using :: clusters[%d] onl.tracklets[%d] onl.tracks[%d]",
2049 fClusters?fClusters->GetEntriesFast():0,
2050 AliTRDReconstructor::GetTracklets()?AliTRDReconstructor::GetTracklets()->GetEntriesFast():0,
2051 AliTRDReconstructor::GetTracks()?AliTRDReconstructor::GetTracks()->GetEntriesFast():0));
66f6bfd9 2052
66f6bfd9 2053 BuildTrackingContainers();
2054
66f6bfd9 2055 return 0;
2056}
2057
2058//_____________________________________________________________________________
4d6aee34 2059Int_t AliTRDtrackerV1::LoadClusters(TClonesArray * const clusters)
66f6bfd9 2060{
2061 //
2062 // Fills clusters into TRD tracking sectors
2063 // Function for use in the HLT
2064
2065 if(!clusters || !clusters->GetEntriesFast()){
2066 AliInfo("No TRD clusters");
41702fec 2067 return 1;
d2eba04b 2068 } else AliInfo(Form("Using :: external.clusters[%d]", clusters->GetEntriesFast()));
2069
41702fec 2070
66f6bfd9 2071 fClusters = clusters;
66f6bfd9 2072
9e85cb05 2073 fkRecoParam = fkReconstructor->GetRecoParam(); // load reco param for this event
66f6bfd9 2074 BuildTrackingContainers();
2075
66f6bfd9 2076 return 0;
2077}
2078
2079
2080//____________________________________________________________________
2081Int_t AliTRDtrackerV1::BuildTrackingContainers()
2082{
2083// Building tracking containers for clusters
2084
c79857d5 2085 Int_t nin(0), ncl(fClusters->GetEntriesFast());
2086 while (ncl--) {
2087 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
41702fec 2088 if(c->IsInChamber()) nin++;
4226b195 2089 if(fkReconstructor->IsHLT()) c->SetRPhiMethod(AliTRDcluster::kCOG);
41702fec 2090 Int_t detector = c->GetDetector();
2091 Int_t sector = fGeom->GetSector(detector);
053767a4 2092 Int_t stack = fGeom->GetStack(detector);
2093 Int_t layer = fGeom->GetLayer(detector);
41702fec 2094
0b559d95 2095 fTrSec[sector].GetChamber(stack, layer, kTRUE)->InsertCluster(c, ncl);
41702fec 2096 }
b0a48c4d 2097
053767a4 2098 for(int isector =0; isector<AliTRDgeometry::kNsector; isector++){
41702fec 2099 if(!fTrSec[isector].GetNChambers()) continue;
c79857d5 2100 fTrSec[isector].Init(fkReconstructor);
41702fec 2101 }
66f6bfd9 2102
2103 return nin;
eb38ed55 2104}
2105
2106
66f6bfd9 2107
0906e73e 2108//____________________________________________________________________
172b6f82 2109void AliTRDtrackerV1::UnloadClusters()
0906e73e 2110{
d4cf71ca 2111//
2112// Clears the arrays of clusters and tracks. Resets sectors and timebins
2113// If option "force" is also set the containers are also deleted. This is useful
2114// in case of HLT
2115
2116 if(fTracks){
2117 fTracks->Delete();
4d6aee34 2118 if(HasRemoveContainers()){delete fTracks; fTracks = NULL;}
d4cf71ca 2119 }
2120 if(fTracklets){
2121 fTracklets->Delete();
4d6aee34 2122 if(HasRemoveContainers()){delete fTracklets; fTracklets = NULL;}
d4cf71ca 2123 }
d2eba04b 2124 if(fClusters && IsClustersOwner()){
2125 AliInfo(Form("tracker[%p] clearing %d own clusters @ %p", (void*)this, fClusters->GetEntries(), (void*)fClusters));
2126 fClusters->Delete();
2127//
2128// // save clusters array in the reconstructor for further use.
2129// if(!fkReconstructor->IsWritingClusters()){
2130// AliTRDReconstructor::SetClusters(fClusters);
2131// SetClustersOwner(kFALSE);
2132// } else AliTRDReconstructor::SetClusters(NULL);
48f8adf3 2133 }
0906e73e 2134
053767a4 2135 for (int i = 0; i < AliTRDgeometry::kNsector; i++) fTrSec[i].Clear();
0906e73e 2136
41702fec 2137 // Increment the Event Number
2138 AliTRDtrackerDebug::SetEventNumber(AliTRDtrackerDebug::GetEventNumber() + 1);
eb38ed55 2139}
0906e73e 2140
fac58f00 2141// //____________________________________________________________________
2142// void AliTRDtrackerV1::UseClusters(const AliKalmanTrack *t, Int_t) const
2143// {
2144// const AliTRDtrackV1 *track = dynamic_cast<const AliTRDtrackV1*>(t);
2145// if(!track) return;
2146//
4d6aee34 2147// AliTRDseedV1 *tracklet = NULL;
fac58f00 2148// for(Int_t ily=AliTRDgeometry::kNlayer; ily--;){
2149// if(!(tracklet = track->GetTracklet(ily))) continue;
4d6aee34 2150// AliTRDcluster *c = NULL;
8d2bec9e 2151// for(Int_t ic=AliTRDseed::kNclusters; ic--;){
fac58f00 2152// if(!(c=tracklet->GetClusters(ic))) continue;
2153// c->Use();
2154// }
2155// }
2156// }
2157//
b1957d3c 2158
eb38ed55 2159//_____________________________________________________________________________
4d6aee34 2160Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *const track)
eb38ed55 2161{
41702fec 2162 //
2163 // Rotates the track when necessary
2164 //
2165
2166 Double_t alpha = AliTRDgeometry::GetAlpha();
2167 Double_t y = track->GetY();
2168 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
3cfaffa4 2169
41702fec 2170 if (y > ymax) {
2171 if (!track->Rotate( alpha)) {
2172 return kFALSE;
2173 }
2174 }
2175 else if (y < -ymax) {
2176 if (!track->Rotate(-alpha)) {
2177 return kFALSE;
2178 }
2179 }
2180
2181 return kTRUE;
0906e73e 2182
2183}
2184
eb38ed55 2185
0906e73e 2186//____________________________________________________________________
33ab3872 2187AliTRDseedV1* AliTRDtrackerV1::GetTracklet(const AliTRDtrackV1 *const track, Int_t p, Int_t &idx)
0906e73e 2188{
41702fec 2189 // Find tracklet for TRD track <track>
2190 // Parameters
2191 // - track
2192 // - sector
2193 // - plane
2194 // - index
2195 // Output
2196 // tracklet
2197 // index
2198 // Detailed description
2199 //
2200 idx = track->GetTrackletIndex(p);
17896e82 2201 AliTRDseedV1 *tracklet = (idx<0) ? NULL : (AliTRDseedV1*)fTracklets->UncheckedAt(idx);
41702fec 2202
2203 return tracklet;
0906e73e 2204}
2205
2206//____________________________________________________________________
4d6aee34 2207AliTRDseedV1* AliTRDtrackerV1::SetTracklet(const AliTRDseedV1 * const tracklet)
0906e73e 2208{
41702fec 2209 // Add this tracklet to the list of tracklets stored in the tracker
2210 //
2211 // Parameters
2212 // - tracklet : pointer to the tracklet to be added to the list
2213 //
2214 // Output
2215 // - the index of the new tracklet in the tracker tracklets list
2216 //
2217 // Detailed description
2218 // Build the tracklets list if it is not yet created (late initialization)
2219 // and adds the new tracklet to the list.
2220 //
2221 if(!fTracklets){
053767a4 2222 fTracklets = new TClonesArray("AliTRDseedV1", AliTRDgeometry::Nsector()*kMaxTracksStack);
41702fec 2223 fTracklets->SetOwner(kTRUE);
2224 }
2225 Int_t nentries = fTracklets->GetEntriesFast();
2226 return new ((*fTracklets)[nentries]) AliTRDseedV1(*tracklet);
972ef65e 2227}
2228
d20df6fc 2229//____________________________________________________________________
4d6aee34 2230AliTRDtrackV1* AliTRDtrackerV1::SetTrack(const AliTRDtrackV1 * const track)
d20df6fc 2231{
2232 // Add this track to the list of tracks stored in the tracker
2233 //
2234 // Parameters
2235 // - track : pointer to the track to be added to the list
2236 //
2237 // Output
2238 // - the pointer added
2239 //
2240 // Detailed description
2241 // Build the tracks list if it is not yet created (late initialization)
2242 // and adds the new track to the list.
2243 //
2244 if(!fTracks){
053767a4 2245 fTracks = new TClonesArray("AliTRDtrackV1", AliTRDgeometry::Nsector()*kMaxTracksStack);
d20df6fc 2246 fTracks->SetOwner(kTRUE);
2247 }
2248 Int_t nentries = fTracks->GetEntriesFast();
2249 return new ((*fTracks)[nentries]) AliTRDtrackV1(*track);
2250}
2251
2252
0906e73e 2253
e4f2f73d 2254//____________________________________________________________________
eb38ed55 2255Int_t AliTRDtrackerV1::Clusters2TracksSM(Int_t sector, AliESDEvent *esd)
e4f2f73d 2256{
41702fec 2257 //
2258 // Steer tracking for one SM.
2259 //
2260 // Parameters :
2261 // sector : Array of (SM) propagation layers containing clusters
2262 // esd : The current ESD event. On output it contains the also
2263 // the ESD (TRD) tracks found in this SM.
2264 //
2265 // Output :
2266 // Number of tracks found in this TRD supermodule.
2267 //
2268 // Detailed description
2269 //
2270 // 1. Unpack AliTRDpropagationLayers objects for each stack.
2271 // 2. Launch stack tracking.
2272 // See AliTRDtrackerV1::Clusters2TracksStack() for details.
2273 // 3. Pack results in the ESD event.
2274 //
2275
41702fec 2276 Int_t nTracks = 0;
2277 Int_t nChambers = 0;
4d6aee34 2278 AliTRDtrackingChamber **stack = NULL, *chamber = NULL;
053767a4 2279 for(int istack = 0; istack<AliTRDgeometry::kNstack; istack++){
41702fec 2280 if(!(stack = fTrSec[sector].GetStack(istack))) continue;
2281 nChambers = 0;
053767a4 2282 for(int ilayer=0; ilayer<AliTRDgeometry::kNlayer; ilayer++){
2283 if(!(chamber = stack[ilayer])) continue;
9e85cb05 2284 if(chamber->GetNClusters() < fgNTimeBins * fkRecoParam->GetFindableClusters()) continue;
41702fec 2285 nChambers++;
053767a4 2286 //AliInfo(Form("sector %d stack %d layer %d clusters %d", sector, istack, ilayer, chamber->GetNClusters()));
41702fec 2287 }
2288 if(nChambers < 4) continue;
2289 //AliInfo(Form("Doing stack %d", istack));
b1135f96 2290 nTracks += Clusters2TracksStack(stack, fTracksESD);
41702fec 2291 }
050875b0 2292 if(nTracks) AliDebug(2, Form("Number of tracks: SM_%02d[%d]", sector, nTracks));
2293
352cef8f 2294 for(int itrack=0; itrack<nTracks; itrack++){
2295 AliESDtrack *esdTrack((AliESDtrack*)(fTracksESD->operator[](itrack)));
2296 Int_t id = esd->AddTrack(esdTrack);
2297
2298 // set ESD id to stand alone TRD tracks
2c7f43b6 2299 if (fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 0 || AliTRDReconstructor::GetStreamLevel()>0 ){
352cef8f 2300 esdTrack=esd->GetTrack(id);
2301 TObject *o(NULL); Int_t ic(0);
2302 AliTRDtrackV1 *calibTrack(NULL);
2303 while((o = esdTrack->GetCalibObject(ic++))){
2304 if(!(calibTrack = dynamic_cast<AliTRDtrackV1*>(o))) continue;
2305 calibTrack->SetESDid(esdTrack->GetID());
2306 break;
2307 }
2308 }
2309 }
41702fec 2310
2311 // Reset Track and Candidate Number
2312 AliTRDtrackerDebug::SetCandidateNumber(0);
2313 AliTRDtrackerDebug::SetTrackNumber(0);
b1135f96 2314
2315 // delete ESD tracks in the array
2316 fTracksESD->Delete();
41702fec 2317 return nTracks;
e4f2f73d 2318}
2319
2320//____________________________________________________________________
4d6aee34 2321Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray * const esdTrackList)
e4f2f73d 2322{
41702fec 2323 //
2324 // Make tracks in one TRD stack.
2325 //
2326 // Parameters :
2327 // layer : Array of stack propagation layers containing clusters
2328 // esdTrackList : Array of ESD tracks found by the stand alone tracker.
2329 // On exit the tracks found in this stack are appended.
2330 //
2331 // Output :
2332 // Number of tracks found in this stack.
2333 //
2334 // Detailed description
2335 //
2336 // 1. Find the 3 most useful seeding chambers. See BuildSeedingConfigs() for details.
2337 // 2. Steer AliTRDtrackerV1::MakeSeeds() for 3 seeding layer configurations.
2338 // See AliTRDtrackerV1::MakeSeeds() for more details.
2339 // 3. Arrange track candidates in decreasing order of their quality
2340 // 4. Classify tracks in 5 categories according to:
2341 // a) number of layers crossed
2342 // b) track quality
2343 // 5. Sign clusters by tracks in decreasing order of track quality
2344 // 6. Build AliTRDtrack out of seeding tracklets
2345 // 7. Cook MC label
2346 // 8. Build ESD track and register it to the output list
2347 //
2348
4d6aee34 2349 AliTRDtrackingChamber *chamber = NULL;
2350 AliTRDtrackingChamber **ci = NULL;
41702fec 2351 AliTRDseedV1 sseed[kMaxTracksStack*6]; // to be initialized
2352 Int_t pars[4]; // MakeSeeds parameters
2353
2354 //Double_t alpha = AliTRDgeometry::GetAlpha();
2355 //Double_t shift = .5 * alpha;
2356 Int_t configs[kNConfigs];
2357
fac58f00 2358 // Purge used clusters from the containers
2359 ci = &stack[0];
2360 for(Int_t ic = kNPlanes; ic--; ci++){
2361 if(!(*ci)) continue;
2362 (*ci)->Update();
2363 }
2364
41702fec 2365 // Build initial seeding configurations
2366 Double_t quality = BuildSeedingConfigs(stack, configs);
2c7f43b6 2367 if(fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 10 || AliTRDReconstructor::GetStreamLevel()>10){
41702fec 2368 AliInfo(Form("Plane config %d %d %d Quality %f"
2369 , configs[0], configs[1], configs[2], quality));
2370 }
d931f2aa 2371
41702fec 2372
2373 // Initialize contors
2374 Int_t ntracks, // number of TRD track candidates
2375 ntracks1, // number of registered TRD tracks/iter
2376 ntracks2 = 0; // number of all registered TRD tracks in stack
2377 fSieveSeeding = 0;
d931f2aa 2378
2379 // Get stack index
fac58f00 2380 Int_t ic = 0; ci = &stack[0];
2381 while(ic<kNPlanes && !(*ci)){ic++; ci++;}
2382 if(!(*ci)) return ntracks2;
2383 Int_t istack = fGeom->GetStack((*ci)->GetDetector());
d931f2aa 2384
41702fec 2385 do{
2386 // Loop over seeding configurations
2387 ntracks = 0; ntracks1 = 0;
0b559d95 2388 for (Int_t iconf = 0; iconf<fkRecoParam->GetNumberOfSeedConfigs(); iconf++) {
41702fec 2389 pars[0] = configs[iconf];
2390 pars[1] = ntracks;
d931f2aa 2391 pars[2] = istack;
41702fec 2392 ntracks = MakeSeeds(stack, &sseed[6*ntracks], pars);
6e39bde4 2393 //AliInfo(Form("Number of Tracks after iteration step %d: %d\n", iconf, ntracks));
41702fec 2394 if(ntracks == kMaxTracksStack) break;
2395 }
980d5a2a 2396 AliDebug(2, Form("Candidate TRD tracks %d in iteration %d.", ntracks, fSieveSeeding));
41702fec 2397 if(!ntracks) break;
2398
2399 // Sort the seeds according to their quality
41f024fb 2400 Int_t sort[kMaxTracksStack+1];
41702fec 2401 TMath::Sort(ntracks, fTrackQuality, sort, kTRUE);
68f9b6bd 2402 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1") > 2){
2403 AliDebug(3, "Track candidates classification:");
2404 for (Int_t it(0); it < ntracks; it++) {
2405 Int_t jt(sort[it]);
2406 printf(" %2d idx[%d] Quality[%e]\n", it, jt, fTrackQuality[jt]);
2407 }
2408 }
41702fec 2409
2410 // Initialize number of tracks so far and logic switches
2411 Int_t ntracks0 = esdTrackList->GetEntriesFast();
2412 Bool_t signedTrack[kMaxTracksStack];
2413 Bool_t fakeTrack[kMaxTracksStack];
2414 for (Int_t i=0; i<ntracks; i++){
2415 signedTrack[i] = kFALSE;
2416 fakeTrack[i] = kFALSE;
2417 }
2418 //AliInfo("Selecting track candidates ...");
2419
2420 // Sieve clusters in decreasing order of track quality
68f9b6bd 2421 Int_t jSieve(0), rejectedCandidates(0);
41702fec 2422 do{
41702fec 2423 // Check track candidates
68f9b6bd 2424 rejectedCandidates=0;
41702fec 2425 for (Int_t itrack = 0; itrack < ntracks; itrack++) {
804bb02e 2426 Int_t trackIndex = sort[itrack];
2427 if (signedTrack[trackIndex] || fakeTrack[trackIndex]) continue;
41702fec 2428
804bb02e 2429 // Calculate track parameters from tracklets seeds
804bb02e 2430 Int_t ncl = 0;
2431 Int_t nused = 0;
2432 Int_t nlayers = 0;
2433 Int_t findable = 0;
2434 for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) {
2435 Int_t jseed = kNPlanes*trackIndex+jLayer;
68f9b6bd 2436 sseed[jseed].UpdateUsed();
804bb02e 2437 if(!sseed[jseed].IsOK()) continue;
68f9b6bd 2438 // check if primary candidate
f29f13a6 2439 if (TMath::Abs(sseed[jseed].GetYref(0) / sseed[jseed].GetX0()) < 0.158) findable++;
68f9b6bd 2440 ncl += sseed[jseed].GetN();
804bb02e 2441 nused += sseed[jseed].GetNUsed();
2442 nlayers++;
804bb02e 2443 }
2444
f29f13a6 2445 // Filter duplicated tracks
2446 if (nused > 30){
68f9b6bd 2447 AliDebug(4, Form("REJECTED : %d idx[%d] quality[%e] tracklets[%d] usedClusters[%d]", itrack, trackIndex, fTrackQuality[trackIndex], nlayers, nused));
f29f13a6 2448 fakeTrack[trackIndex] = kTRUE;
2449 continue;
2450 }
5ef88e00 2451 if (ncl>0 && Float_t(nused)/ncl >= .25){
68f9b6bd 2452 AliDebug(4, Form("REJECTED : %d idx[%d] quality[%e] tracklets[%d] usedClusters[%d] used/ncl[%f]", itrack, trackIndex, fTrackQuality[trackIndex], nlayers, nused, Float_t(nused)/ncl));
f29f13a6 2453 fakeTrack[trackIndex] = kTRUE;
2454 continue;
2455 }
41702fec 2456
68f9b6bd 2457 AliDebug(4, Form("Candidate[%d] Quality[%e] Tracklets[%d] Findable[%d] Ncl[%d] Nused[%d]", trackIndex, fTrackQuality[trackIndex], nlayers, findable, ncl, nused));
2458
f29f13a6 2459 // Classify tracks
2460 Bool_t skip = kFALSE;
2461 switch(jSieve){
68f9b6bd 2462 case 0: // select 6 tracklets primary tracks, good quality
2463 if(nlayers > findable || nlayers < kNPlanes) {skip = kTRUE; break;}
f29f13a6 2464 if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;}
2465 break;
2466
68f9b6bd 2467 case 1: // select shorter primary tracks, good quality
e7542a7e 2468 //if(findable<4){skip = kTRUE; break;}
f29f13a6 2469 if(nlayers < findable){skip = kTRUE; break;}
2470 if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -4.){skip = kTRUE; break;}
2471 break;
2472
68f9b6bd 2473 case 2: // select 6 tracklets secondary tracks
2474 if(nlayers < kNPlanes) { skip = kTRUE; break;}
f29f13a6 2475 if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -6.0){skip = kTRUE; break;}
2476 break;
2477
68f9b6bd 2478 case 3: // select shorter tracks, good quality
2479 if (nlayers<4){skip = kTRUE; break;}
f29f13a6 2480 if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;}
2481 break;
2482
68f9b6bd 2483 case 4: // select anything with at least 4 tracklets
2484 if (nlayers<4){skip = kTRUE; break;}
f29f13a6 2485 //if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) - nused/(nlayers-3.0) < -15.0){skip = kTRUE; break;}
2486 break;
2487 }
2488 if(skip){
68f9b6bd 2489 rejectedCandidates++;
5ef88e00 2490 AliDebug(4, Form("REJECTED : %d idx[%d] quality[%e] tracklets[%d] usedClusters[%d]", itrack, trackIndex, fTrackQuality[trackIndex], nlayers, nused));
f29f13a6 2491 continue;
5ef88e00 2492 } else AliDebug(4, Form("ACCEPTED : %d idx[%d] quality[%e] tracklets[%d] usedClusters[%d]", itrack, trackIndex, fTrackQuality[trackIndex], nlayers, nused));
2493
f29f13a6 2494 signedTrack[trackIndex] = kTRUE;
2495
68f9b6bd 2496 AliTRDseedV1 *lseed =&sseed[trackIndex*kNPlanes];
2497 AliTRDtrackV1 *track = MakeTrack(lseed);
2498 if(!track){
2499 AliDebug(1, "Track building failed.");
2500 continue;
2501 } else {
2502 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1") > 1){
2503 Int_t ich = 0; while(!(chamber = stack[ich])) ich++;
2504 AliDebug(2, Form("Track pt=%7.2fGeV/c SM[%2d] Done.", track->Pt(), fGeom->GetSector(chamber->GetDetector())));
2505 }
2506 }
f29f13a6 2507
9e85cb05 2508 if(fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()){
eb2b4f91 2509 //AliInfo(Form("Track %d [%d] nlayers %d trackQuality = %e nused %d, yref = %3.3f", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused, trackParams[1]));
f29f13a6 2510
f29f13a6 2511 AliTRDseedV1 *dseed[6];
b82b4de1 2512 for(Int_t iseed = AliTRDgeometry::kNlayer; iseed--;) dseed[iseed] = new AliTRDseedV1(lseed[iseed]);
f29f13a6 2513
2514 //Int_t eventNrInFile = esd->GetEventNumberInFile();
f29f13a6 2515 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
2516 Int_t trackNumber = AliTRDtrackerDebug::GetTrackNumber();
2517 Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
a2fbb6ec 2518 TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
f29f13a6 2519 cstreamer << "Clusters2TracksStack"
68f9b6bd 2520 << "EventNumber=" << eventNumber
2521 << "TrackNumber=" << trackNumber
2522 << "CandidateNumber=" << candidateNumber
2523 << "Iter=" << fSieveSeeding
2524 << "Like=" << fTrackQuality[trackIndex]
2525 << "S0.=" << dseed[0]
2526 << "S1.=" << dseed[1]
2527 << "S2.=" << dseed[2]
2528 << "S3.=" << dseed[3]
2529 << "S4.=" << dseed[4]
2530 << "S5.=" << dseed[5]
2531 << "Ncl=" << ncl
2532 << "NLayers=" << nlayers
2533 << "Findable=" << findable
2534 << "NUsed=" << nused
f29f13a6 2535 << "\n";
2536 }
d877f55f 2537
68f9b6bd 2538
f29f13a6 2539 AliESDtrack *esdTrack = new ((*esdTrackList)[ntracks0++]) AliESDtrack();
2540 esdTrack->UpdateTrackParams(track, AliESDtrack::kTRDout);
2541 esdTrack->SetLabel(track->GetLabel());
2542 track->UpdateESDtrack(esdTrack);
2543 // write ESD-friends if neccessary
2c7f43b6 2544 if (fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 0 || AliTRDReconstructor::GetStreamLevel()>0 ){
f29f13a6 2545 AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(*track);
2546 calibTrack->SetOwner();
2547 esdTrack->AddCalibObject(calibTrack);
2548 }
2549 ntracks1++;
2550 AliTRDtrackerDebug::SetTrackNumber(AliTRDtrackerDebug::GetTrackNumber() + 1);
41702fec 2551 }
2552
2553 jSieve++;
68f9b6bd 2554 } while(jSieve<5 && rejectedCandidates); // end track candidates sieve
41702fec 2555 if(!ntracks1) break;
2556
2557 // increment counters
2558 ntracks2 += ntracks1;
4302c900 2559
4d6aee34 2560 if(fkReconstructor->IsHLT()) break;
41702fec 2561 fSieveSeeding++;
2562
2563 // Rebuild plane configurations and indices taking only unused clusters into account
2564 quality = BuildSeedingConfigs(stack, configs);
4d6aee34 2565 if(quality < 1.E-7) break; //fkReconstructor->GetRecoParam() ->GetPlaneQualityThreshold()) break;
41702fec 2566
2567 for(Int_t ip = 0; ip < kNPlanes; ip++){
2568 if(!(chamber = stack[ip])) continue;
c79857d5 2569 chamber->Build(fGeom);//Indices(fSieveSeeding);
41702fec 2570 }
2571
2c7f43b6 2572 if(fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 10 || AliTRDReconstructor::GetStreamLevel()>10){
41702fec 2573 AliInfo(Form("Sieve level %d Plane config %d %d %d Quality %f", fSieveSeeding, configs[0], configs[1], configs[2], quality));
2574 }
2575 } while(fSieveSeeding<10); // end stack clusters sieve
2576
2577
2578
2579 //AliInfo(Form("Registered TRD tracks %d in stack %d.", ntracks2, pars[1]));
2580
2581 return ntracks2;
e4f2f73d 2582}
2583
2584//___________________________________________________________________
eb38ed55 2585Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs)
e4f2f73d 2586{
41702fec 2587 //
2588 // Assign probabilities to chambers according to their
2589 // capability of producing seeds.
2590 //
2591 // Parameters :
2592 //
2593 // layers : Array of stack propagation layers for all 6 chambers in one stack
2594 // configs : On exit array of configuration indexes (see GetSeedingConfig()
2595 // for details) in the decreasing order of their seeding probabilities.
2596 //
2597 // Output :
2598 //
2599 // Return top configuration quality
2600 //
2601 // Detailed description:
2602 //
2603 // To each chamber seeding configuration (see GetSeedingConfig() for
2604 // the list of all configurations) one defines 2 quality factors:
2605 // - an apriori topological quality (see GetSeedingConfig() for details) and
2606 // - a data quality based on the uniformity of the distribution of
2607 // clusters over the x range (time bins population). See CookChamberQA() for details.
2608 // The overall chamber quality is given by the product of this 2 contributions.
2609 //
2610
eb2b4f91 2611 Double_t chamberQ[kNPlanes];memset(chamberQ, 0, kNPlanes*sizeof(Double_t));
4d6aee34 2612 AliTRDtrackingChamber *chamber = NULL;
41702fec 2613 for(int iplane=0; iplane<kNPlanes; iplane++){
2614 if(!(chamber = stack[iplane])) continue;
2615 chamberQ[iplane] = (chamber = stack[iplane]) ? chamber->GetQuality() : 0.;
2616 }
2617
eb2b4f91 2618 Double_t tconfig[kNConfigs];memset(tconfig, 0, kNConfigs*sizeof(Double_t));
2619 Int_t planes[] = {0, 0, 0, 0};
41702fec 2620 for(int iconf=0; iconf<kNConfigs; iconf++){
2621 GetSeedingConfig(iconf, planes);
2622 tconfig[iconf] = fgTopologicQA[iconf];
2623 for(int iplane=0; iplane<4; iplane++) tconfig[iconf] *= chamberQ[planes[iplane]];
2624 }
2625
2626 TMath::Sort((Int_t)kNConfigs, tconfig, configs, kTRUE);
0b559d95 2627 // AliInfo(Form("q[%d] = %f", configs[0], tconfig[configs[0]]));
41702fec 2628 // AliInfo(Form("q[%d] = %f", configs[1], tconfig[configs[1]]));
2629 // AliInfo(Form("q[%d] = %f", configs[2], tconfig[configs[2]]));
2630
2631 return tconfig[configs[0]];
e4f2f73d 2632}
2633
2634//____________________________________________________________________
e17f4785 2635Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 * const sseed, const Int_t * const ipar)
e4f2f73d 2636{
afa21247 2637//
2a3191bb 2638// Seed tracklets and build candidate TRD tracks. The procedure is used during barrel tracking to account for tracks which are
2639// either missed by TPC prolongation or conversions inside the TRD volume.
2640// For stand alone tracking the procedure is used to estimate all tracks measured by TRD.
afa21247 2641//
2642// Parameters :
2643// layers : Array of stack propagation layers containing clusters
2644// sseed : Array of empty tracklet seeds. On exit they are filled.
2645// ipar : Control parameters:
2646// ipar[0] -> seeding chambers configuration
2647// ipar[1] -> stack index
2648// ipar[2] -> number of track candidates found so far
2649//
2650// Output :
2651// Number of tracks candidates found.
2652//
2653// The following steps are performed:
2654// 1. Build seeding layers by collapsing all time bins from each of the four seeding chambers along the
2655// radial coordinate. See AliTRDtrackingChamber::GetSeedingLayer() for details. The chambers selection for seeding
2656// is described in AliTRDtrackerV1::Clusters2TracksStack().
2657// 2. Using the seeding clusters from the seeding layer (step 1) build combinatorics using the following algorithm:
2658// - for each seeding cluster in the lower seeding layer find
2659// - all seeding clusters in the upper seeding layer inside a road defined by a given phi angle. The angle
2660// is calculated on the minimum pt of tracks from vertex accesible to the stand alone tracker.
2661// - for each pair of two extreme seeding clusters select middle upper cluster using roads defined externally by the
2662// reco params
2663// - select last seeding cluster as the nearest to the linear approximation of the track described by the first three
2664// seeding clusters.
2665// The implementation of road calculation and cluster selection can be found in the functions AliTRDchamberTimeBin::BuildCond()
2666// and AliTRDchamberTimeBin::GetClusters().
2667// 3. Helix fit of the seeding clusters set. (see AliTRDtrackerFitter::FitRieman(AliTRDcluster**)). No tilt correction is
2668// performed at this level
2669// 4. Initialize seeding tracklets in the seeding chambers.
2670// 5. *Filter 0* Chi2 cut on the Y and Z directions. The threshold is set externally by the reco params.
2671// 6. Attach (true) clusters to seeding tracklets (see AliTRDseedV1::AttachClusters()) and fit tracklet (see
2672// AliTRDseedV1::Fit()). The number of used clusters used by current seeds should not exceed ... (25).
2673// 7. *Filter 1* Check if all 4 seeding tracklets are correctly constructed.
2674// 8. Helix fit of the clusters from the seeding tracklets with tilt correction. Refit tracklets using the new
2675// approximation of the track.
2676// 9. *Filter 2* Calculate likelihood of the track. (See AliTRDtrackerV1::CookLikelihood()). The following quantities are
2677// checked against the Riemann fit:
2678// - position resolution in y
2679// - angular resolution in the bending plane
2680// - likelihood of the number of clusters attached to the tracklet
2681// 10. Extrapolation of the helix fit to the other 2 chambers *non seeding* chambers:
2682// - Initialization of extrapolation tracklets with the fit parameters
2683// - Attach clusters to extrapolated tracklets
2684// - Helix fit of tracklets
2685// 11. Improve seeding tracklets quality by reassigning clusters based on the last parameters of the track
2686// See AliTRDtrackerV1::ImproveSeedQuality() for details.
2687// 12. Helix fit of all 6 seeding tracklets and chi2 calculation
2688// 13. Hyperplane fit and track quality calculation. See AliTRDtrackerFitter::FitHyperplane() for details.
2689// 14. Cooking labels for tracklets. Should be done only for MC
2690// 15. Register seeds.
2691//
2692// Authors:
2693// Marian Ivanov <M.Ivanov@gsi.de>
2694// Alexandru Bercuci <A.Bercuci@gsi.de>
2695// Markus Fasel <M.Fasel@gsi.de>
41702fec 2696
4d6aee34 2697 AliTRDtrackingChamber *chamber = NULL;
2698 AliTRDcluster *c[kNSeedPlanes] = {NULL, NULL, NULL, NULL}; // initilize seeding clusters
e17f4785 2699 AliTRDseedV1 *cseed = &sseed[0]; // initialize tracklets for first track
41702fec 2700 Int_t ncl, mcl; // working variable for looping over clusters
2701 Int_t index[AliTRDchamberTimeBin::kMaxClustersLayer], jndex[AliTRDchamberTimeBin::kMaxClustersLayer];
2702 // chi2 storage
2703 // chi2[0] = tracklet chi2 on the Z direction
2704 // chi2[1] = tracklet chi2 on the R direction
2705 Double_t chi2[4];
2706
afa21247 2707 // this should be data member of AliTRDtrack TODO
d2eba04b 2708// Double_t seedQuality[kMaxTracksStack];
41702fec 2709
2710 // unpack control parameters
2711 Int_t config = ipar[0];
2712 Int_t ntracks = ipar[1];
d931f2aa 2713 Int_t istack = ipar[2];
41702fec 2714 Int_t planes[kNSeedPlanes]; GetSeedingConfig(config, planes);
afa21247 2715 Int_t planesExt[kNPlanes-kNSeedPlanes]; GetExtrapolationConfig(config, planesExt);
be24510a 2716
2717
41702fec 2718 // Init chambers geometry
41702fec 2719 Double_t hL[kNPlanes]; // Tilting angle
2720 Float_t padlength[kNPlanes]; // pad lenghts
dd8059a8 2721 Float_t padwidth[kNPlanes]; // pad widths
4d6aee34 2722 AliTRDpadPlane *pp = NULL;
41702fec 2723 for(int iplane=0; iplane<kNPlanes; iplane++){
2724 pp = fGeom->GetPadPlane(iplane, istack);
bb79ccd5 2725 hL[iplane] = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle());
41702fec 2726 padlength[iplane] = pp->GetLengthIPad();
dd8059a8 2727 padwidth[iplane] = pp->GetWidthIPad();
41702fec 2728 }
2729
eb2b4f91 2730 // Init anode wire position for chambers
e165b64b 2731 Double_t x0[kNPlanes], // anode wire position
eb2b4f91 2732 driftLength = .5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); // drift length
4d6aee34 2733 TGeoHMatrix *matrix = NULL;
eb2b4f91 2734 Double_t loc[] = {AliTRDgeometry::AnodePos(), 0., 0.};
2735 Double_t glb[] = {0., 0., 0.};
2736 AliTRDtrackingChamber **cIter = &stack[0];
a3743898 2737 for(int iLayer=0; iLayer<kNPlanes; iLayer++,cIter++){
eb2b4f91 2738 if(!(*cIter)) continue;
e165b64b 2739 if(!(matrix = fGeom->GetClusterMatrix((*cIter)->GetDetector()))){
e165b64b 2740 x0[iLayer] = fgkX0[iLayer];
e7542a7e 2741 continue;
e165b64b 2742 }
eb2b4f91 2743 matrix->LocalToMaster(loc, glb);
2744 x0[iLayer] = glb[0];
2745 }
2746
980d5a2a 2747 AliDebug(2, Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks));
41702fec 2748
d931f2aa 2749 // Build seeding layers
d611c74f 2750 ResetSeedTB();
41702fec 2751 Int_t nlayers = 0;
41702fec 2752 for(int isl=0; isl<kNSeedPlanes; isl++){
2753 if(!(chamber = stack[planes[isl]])) continue;
4d6aee34 2754 if(!chamber->GetSeedingLayer(fSeedTB[isl], fGeom, fkReconstructor)) continue;
41702fec 2755 nlayers++;
41702fec 2756 }
eb2b4f91 2757 if(nlayers < kNSeedPlanes) return ntracks;
41702fec 2758
2759
2760 // Start finding seeds
2761 Double_t cond0[4], cond1[4], cond2[4];
2762 Int_t icl = 0;
d611c74f 2763 while((c[3] = (*fSeedTB[3])[icl++])){
41702fec 2764 if(!c[3]) continue;
d611c74f 2765 fSeedTB[0]->BuildCond(c[3], cond0, 0);
2766 fSeedTB[0]->GetClusters(cond0, index, ncl);
41702fec 2767 //printf("Found c[3] candidates 0 %d\n", ncl);
2768 Int_t jcl = 0;
2769 while(jcl<ncl) {
d611c74f 2770 c[0] = (*fSeedTB[0])[index[jcl++]];
41702fec 2771 if(!c[0]) continue;
2772 Double_t dx = c[3]->GetX() - c[0]->GetX();
afa21247 2773 Double_t dzdx = (c[3]->GetZ() - c[0]->GetZ())/dx;
2774 Double_t dydx = (c[3]->GetY() - c[0]->GetY())/dx;
2775 fSeedTB[1]->BuildCond(c[0], cond1, 1, dzdx, dydx);
d611c74f 2776 fSeedTB[1]->GetClusters(cond1, jndex, mcl);
41702fec 2777 //printf("Found c[0] candidates 1 %d\n", mcl);
2778
2779 Int_t kcl = 0;
2780 while(kcl<mcl) {
d611c74f 2781 c[1] = (*fSeedTB[1])[jndex[kcl++]];
2782 if(!c[1]) continue;
afa21247 2783 fSeedTB[2]->BuildCond(c[1], cond2, 2, dzdx, dydx);
d611c74f 2784 c[2] = fSeedTB[2]->GetNearestCluster(cond2);
2785 //printf("Found c[1] candidate 2 %p\n", c[2]);
2786 if(!c[2]) continue;
980d5a2a 2787
2788 AliDebug(3, Form("Seeding clusters\n 0[%6.3f %6.3f %6.3f]\n 1[%6.3f %6.3f %6.3f]\n 2[%6.3f %6.3f %6.3f]\n 3[%6.3f %6.3f %6.3f].",
2789 c[0]->GetX(), c[0]->GetY(), c[0]->GetZ(),
2790 c[1]->GetX(), c[1]->GetY(), c[1]->GetZ(),
2791 c[2]->GetX(), c[2]->GetY(), c[2]->GetZ(),
2792 c[3]->GetX(), c[3]->GetY(), c[3]->GetZ()));
d611c74f 2793
804bb02e 2794 for (Int_t il = 0; il < kNPlanes; il++) cseed[il].Reset();
41702fec 2795
d611c74f 2796 FitRieman(c, chi2);
2797
d931f2aa 2798 AliTRDseedV1 *tseed = &cseed[0];
bb2db46c 2799 cIter = &stack[0];
2800 for(int iLayer=0; iLayer<kNPlanes; iLayer++, tseed++, cIter++){
2801 Int_t det = (*cIter) ? (*cIter)->GetDetector() : -1;
eb2b4f91 2802 tseed->SetDetector(det);
43d6ad34 2803 tseed->SetTilt(hL[iLayer]);
2804 tseed->SetPadLength(padlength[iLayer]);
dd8059a8 2805 tseed->SetPadWidth(padwidth[iLayer]);
4d6aee34 2806 tseed->SetReconstructor(fkReconstructor);
eb2b4f91 2807 tseed->SetX0(det<0 ? fR[iLayer]+driftLength : x0[iLayer]);
d611c74f 2808 tseed->Init(GetRiemanFitter());
f29f13a6 2809 tseed->SetStandAlone(kTRUE);
d611c74f 2810 }
2811
2812 Bool_t isFake = kFALSE;
2c7f43b6 2813 if((fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) >= 2 && fkReconstructor->IsDebugStreaming())
2814 ||AliTRDReconstructor::GetStreamLevel()>=2 ){
d611c74f 2815 if (c[0]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
2816 if (c[1]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
2817 if (c[2]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
2818
2819 Double_t xpos[4];
2820 for(Int_t l = 0; l < kNSeedPlanes; l++) xpos[l] = fSeedTB[l]->GetX();
2821 Float_t yref[4];
2822 for(int il=0; il<4; il++) yref[il] = cseed[planes[il]].GetYref(0);
2823 Int_t ll = c[3]->GetLabel(0);
2824 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
2825 Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
2826 AliRieman *rim = GetRiemanFitter();
a2fbb6ec 2827 TTreeSRedirector &cs0 = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
d611c74f 2828 cs0 << "MakeSeeds0"
2829 <<"EventNumber=" << eventNumber
2830 <<"CandidateNumber=" << candidateNumber
2831 <<"isFake=" << isFake
2832 <<"config=" << config
2833 <<"label=" << ll
2834 <<"chi2z=" << chi2[0]
2835 <<"chi2y=" << chi2[1]
2836 <<"Y2exp=" << cond2[0]
2837 <<"Z2exp=" << cond2[1]
2838 <<"X0=" << xpos[0] //layer[sLayer]->GetX()
2839 <<"X1=" << xpos[1] //layer[sLayer + 1]->GetX()
2840 <<"X2=" << xpos[2] //layer[sLayer + 2]->GetX()
2841 <<"X3=" << xpos[3] //layer[sLayer + 3]->GetX()
2842 <<"yref0=" << yref[0]
2843 <<"yref1=" << yref[1]
2844 <<"yref2=" << yref[2]
2845 <<"yref3=" << yref[3]
2846 <<"c0.=" << c[0]
2847 <<"c1.=" << c[1]
2848 <<"c2.=" << c[2]
2849 <<"c3.=" << c[3]
2850 <<"Seed0.=" << &cseed[planes[0]]
2851 <<"Seed1.=" << &cseed[planes[1]]
2852 <<"Seed2.=" << &cseed[planes[2]]
2853 <<"Seed3.=" << &cseed[planes[3]]
2854 <<"RiemanFitter.=" << rim
2855 <<"\n";
2856 }
9e85cb05 2857 if(chi2[0] > fkRecoParam->GetChi2Z()/*7./(3. - sLayer)*//*iter*/){
980d5a2a 2858 AliDebug(3, Form("Filter on chi2Z [%f].", chi2[0]));
d611c74f 2859 AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
2860 continue;
2861 }
9e85cb05 2862 if(chi2[1] > fkRecoParam->GetChi2Y()/*1./(3. - sLayer)*//*iter*/){
980d5a2a 2863 AliDebug(3, Form("Filter on chi2Y [%f].", chi2[1]));
d611c74f 2864 AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
2865 continue;
2866 }
2867 //AliInfo("Passed chi2 filter.");
2868
2869 // try attaching clusters to tracklets
6e39bde4 2870 Int_t mlayers = 0;
980d5a2a 2871 AliTRDcluster *cl = NULL;
be24510a 2872 for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){
d611c74f 2873 Int_t jLayer = planes[iLayer];
980d5a2a 2874 Int_t nNotInChamber = 0;
f29f13a6 2875 if(!cseed[jLayer].AttachClusters(stack[jLayer], kTRUE)) continue;
980d5a2a 2876 if(/*fkReconstructor->IsHLT()*/kFALSE){
2877 cseed[jLayer].UpdateUsed();
2878 if(!cseed[jLayer].IsOK()) continue;
2879 }else{
2880 cseed[jLayer].Fit();
2881 cseed[jLayer].UpdateUsed();
2882 cseed[jLayer].ResetClusterIter();
2883 while((cl = cseed[jLayer].NextCluster())){
2884 if(!cl->IsInChamber()) nNotInChamber++;
2885 }
2886 //printf("clusters[%d], used[%d], not in chamber[%d]\n", cseed[jLayer].GetN(), cseed[jLayer].GetNUsed(), nNotInChamber);
2887 if(cseed[jLayer].GetN() - (cseed[jLayer].GetNUsed() + nNotInChamber) < 5) continue; // checking for Cluster which are not in chamber is a much stronger restriction on real data
2888 }
d611c74f 2889 mlayers++;
2890 }
be24510a 2891
2892 if(mlayers < kNSeedPlanes){
980d5a2a 2893 AliDebug(2, Form("Found only %d tracklets out of %d. Skip.", mlayers, kNSeedPlanes));
be24510a 2894 AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
2895 continue;
2896 }
2897
2898 // temporary exit door for the HLT
4d6aee34 2899 if(fkReconstructor->IsHLT()){
be24510a 2900 // attach clusters to extrapolation chambers
2901 for(int iLayer=0; iLayer<kNPlanes-kNSeedPlanes; iLayer++){
2902 Int_t jLayer = planesExt[iLayer];
2903 if(!(chamber = stack[jLayer])) continue;
980d5a2a 2904 if(!cseed[jLayer].AttachClusters(chamber, kTRUE)) continue;
5f1ae1e7 2905 cseed[jLayer].Fit();
be24510a 2906 }
0b559d95 2907 //FitTiltedRiemanConstraint(&cseed[0], GetZ());
4302c900 2908 fTrackQuality[ntracks] = 1.; // dummy value
2909 ntracks++;
218ba867 2910 if(ntracks == kMaxTracksStack) return ntracks;
4302c900 2911 cseed += 6;
2912 continue;
2913 }
2914
be24510a 2915
f29f13a6 2916 // Update Seeds and calculate Likelihood
d611c74f 2917 // fit tracklets and cook likelihood
68f9b6bd 2918 Double_t chi2Vals[4];
2919 chi2Vals[0] = FitTiltedRieman(&cseed[0], kTRUE);
f29f13a6 2920 for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){
2921 Int_t jLayer = planes[iLayer];
2eb10c34 2922 cseed[jLayer].Fit(1);
f29f13a6 2923 }
91834b8d 2924 Double_t like = CookLikelihood(&cseed[0], planes); // to be checked
d611c74f 2925
9e85cb05 2926 if (TMath::Log(1.E-9 + like) < fkRecoParam->GetTrackLikelihood()){
980d5a2a 2927 AliDebug(3, Form("Filter on likelihood %f[%e].", TMath::Log(1.E-9 + like), like));
d611c74f 2928 AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
2929 continue;
2930 }
2931 //AliInfo(Form("Passed likelihood %f[%e].", TMath::Log(1.E-9 + like), like));
2932
d2eba04b 2933 // book preliminry results
2934 //seedQuality[ntracks] = like;
d611c74f 2935 fSeedLayer[ntracks] = config;/*sLayer;*/
2936
2937 // attach clusters to the extrapolation seeds
980d5a2a 2938 Int_t elayers(0);
be24510a 2939 for(int iLayer=0; iLayer<kNPlanes-kNSeedPlanes; iLayer++){
2940 Int_t jLayer = planesExt[iLayer];
d611c74f 2941 if(!(chamber = stack[jLayer])) continue;
d611c74f 2942
2943 // fit extrapolated seed
2944 if ((jLayer == 0) && !(cseed[1].IsOK())) continue;
2945 if ((jLayer == 5) && !(cseed[4].IsOK())) continue;
2946 AliTRDseedV1 pseed = cseed[jLayer];
f29f13a6 2947 if(!pseed.AttachClusters(chamber, kTRUE)) continue;
2eb10c34 2948 pseed.Fit(1);
d611c74f 2949 cseed[jLayer] = pseed;
68f9b6bd 2950 chi2Vals[0] = FitTiltedRieman(cseed, kTRUE);
2eb10c34 2951 cseed[jLayer].Fit(1);
980d5a2a 2952 elayers++;
d611c74f 2953 }
2954
2955 // AliInfo("Extrapolation done.");
2956 // Debug Stream containing all the 6 tracklets
2c7f43b6 2957 if((fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) >= 2 && fkReconstructor->IsDebugStreaming())
2958 ||AliTRDReconstructor::GetStreamLevel()>=2){
a2fbb6ec 2959 TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
d611c74f 2960 TLinearFitter *tiltedRieman = GetTiltedRiemanFitter();
2961 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
2962 Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
2963 cstreamer << "MakeSeeds1"
2964 << "EventNumber=" << eventNumber
2965 << "CandidateNumber=" << candidateNumber
2966 << "S0.=" << &cseed[0]
2967 << "S1.=" << &cseed[1]
2968 << "S2.=" << &cseed[2]
2969 << "S3.=" << &cseed[3]
2970 << "S4.=" << &cseed[4]
2971 << "S5.=" << &cseed[5]
2972 << "FitterT.=" << tiltedRieman
2973 << "\n";
2974 }
2975
9e85cb05 2976 if(fkRecoParam->HasImproveTracklets()){
68f9b6bd 2977 if(!ImproveSeedQuality(stack, cseed, chi2Vals[0])){
980d5a2a 2978 AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
68f9b6bd 2979 AliDebug(3, "ImproveSeedQuality() failed.");
980d5a2a 2980 }
d611c74f 2981 }
d611c74f 2982
68f9b6bd 2983 // do track fitting with vertex constraint
2984 if(fkRecoParam->IsVertexConstrained()) chi2Vals[1] = FitTiltedRiemanConstraint(&cseed[0], GetZ());
2985 else chi2Vals[1] = -1.;
2986 chi2Vals[2] = GetChi2Z(&cseed[0]);
2987 chi2Vals[3] = GetChi2Phi(&cseed[0]);
2988
2989 // calculate track quality
2990 fTrackQuality[ntracks] = CalculateTrackLikelihood(&chi2Vals[0]);
fac58f00 2991
2c7f43b6 2992 if((fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) >= 2 && fkReconstructor->IsDebugStreaming())
2993 ||AliTRDReconstructor::GetStreamLevel()>=2){
a2fbb6ec 2994 TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
d611c74f 2995 Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
2996 Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
2997 TLinearFitter *fitterTC = GetTiltedRiemanFitterConstraint();
2998 TLinearFitter *fitterT = GetTiltedRiemanFitter();
91834b8d 2999 Int_t ncls = 0;
3000 for(Int_t iseed = 0; iseed < kNPlanes; iseed++){
3001 ncls += cseed[iseed].IsOK() ? cseed[iseed].GetN2() : 0;
3002 }
d611c74f 3003 cstreamer << "MakeSeeds2"
3004 << "EventNumber=" << eventNumber
3005 << "CandidateNumber=" << candidateNumber
3006 << "Chi2TR=" << chi2Vals[0]
3007 << "Chi2TC=" << chi2Vals[1]
3008 << "Nlayers=" << mlayers
91834b8d 3009 << "NClusters=" << ncls
d611c74f 3010 << "Like=" << like
3011 << "S0.=" << &cseed[0]
3012 << "S1.=" << &cseed[1]
3013 << "S2.=" << &cseed[2]
3014 << "S3.=" << &cseed[3]
3015 << "S4.=" << &cseed[4]
3016 << "S5.=" << &cseed[5]
d611c74f 3017 << "FitterT.=" << fitterT
3018 << "FitterTC.=" << fitterTC
3019 << "\n";
3020 }
68f9b6bd 3021 if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")){
3022 Double_t pt[]={0., 0.};
3023 for(Int_t il(0); il<kNPlanes; il++){
3024 if(!cseed[il].IsOK()) continue;
3025 pt[0] = GetBz()*kB2C/cseed[il].GetC();
3026 pt[1] = GetBz()*kB2C/cseed[il].GetC(1);
3027 break;
3028 }
3029 AliDebug(2, Form("Candidate[%2d] pt[%7.3f %7.3f] Q[%e]\n"
3030 " [0] x[%6.2f] n[%2d] nu[%d] OK[%c]\n"
3031 " [1] x[%6.2f] n[%2d] nu[%d] OK[%c]\n"
3032 " [2] x[%6.2f] n[%2d] nu[%d] OK[%c]\n"
3033 " [3] x[%6.2f] n[%2d] nu[%d] OK[%c]\n"
3034 " [4] x[%6.2f] n[%2d] nu[%d] OK[%c]\n"
3035 " [5] x[%6.2f] n[%2d] nu[%d] OK[%c]"
3036 , ntracks, pt[0], pt[1], fTrackQuality[ntracks]
3037 ,cseed[0].GetX(), cseed[0].GetN(), cseed[0].GetNUsed(), cseed[0].IsOK()?'y':'n'
3038 ,cseed[1].GetX(), cseed[1].GetN(), cseed[1].GetNUsed(), cseed[1].IsOK()?'y':'n'
3039 ,cseed[2].GetX(), cseed[2].GetN(), cseed[2].GetNUsed(), cseed[2].IsOK()?'y':'n'
3040 ,cseed[3].GetX(), cseed[3].GetN(), cseed[3].GetNUsed(), cseed[3].IsOK()?'y':'n'
3041 ,cseed[4].GetX(), cseed[4].GetN(), cseed[4].GetNUsed(), cseed[4].IsOK()?'y':'n'
3042 ,cseed[5].GetX(), cseed[5].GetN(), cseed[5].GetNUsed(), cseed[5].IsOK()?'y':'n'));
3043 }
d611c74f 3044 ntracks++;
3045 AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
3046 if(ntracks == kMaxTracksStack){
3047 AliWarning(Form("Number of seeds reached maximum allowed (%d) in stack.", kMaxTracksStack));
3048 return ntracks;
3049 }
3050 cseed += 6;
41702fec 3051 }
3052 }
3053 }
41702fec 3054
3055 return ntracks;
e4f2f73d 3056}
3057
3058//_____________________________________________________________________________
68f9b6bd 3059AliTRDtrackV1* AliTRDtrackerV1::MakeTrack(AliTRDseedV1 * const tracklet)
e4f2f73d 3060{
afa21247 3061//