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This is a backward incompatible change in AliRoot. The following methods have been...
[u/mrichter/AliRoot.git] / EMCAL / AliEMCALTracker.cxx
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fe17d4cb 1//========================================================================
2// Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved.
3//
4// Author: The ALICE Off-line Project.
5// Contributors are mentioned in the code where appropriate.
6//
7// Permission to use, copy, modify and distribute this software and its
8// documentation strictly for non-commercial purposes is hereby granted
9// without fee, provided that the above copyright notice appears in all
10// copies and that both the copyright notice and this permission notice
11// appear in the supporting documentation. The authors make no claims
12// about the suitability of this software for any purpose. It is
13// provided "as is" without express or implied warranty.
14//========================================================================
15//
16// Class AliEMCALTracker
17// -----------------------
18// Implementation of the track matching method between barrel tracks and
19// EMCAL clusters.
20// Besides algorithm implementation, some cuts are required to be set
21// in order to define, for each track, an acceptance window where clusters
22// are searched to find best match (if any).
23// The class accepts as input an ESD container, and works directly on it,
24// simply setting, for each of its tracks, the fEMCALindex flag, for each
25// track which is matched to a cluster.
26// In order to use method, one must launch PropagateBack().
27//
28// ------------------------------------------------------------------------
29// author: A. Pulvirenti (alberto.pulvirenti@ct.infn.it)
30//=========================================================================
31
32#include <Riostream.h>
33#include <iomanip>
34
35#include <TFile.h>
36#include <TTree.h>
fe17d4cb 37#include <TList.h>
38#include <TString.h>
39#include <TVector3.h>
40#include <TClonesArray.h>
c61f0e70 41#include <TGeoMatrix.h>
fe17d4cb 42
43#include "AliLog.h"
af885e0f 44#include "AliESDEvent.h"
fe17d4cb 45#include "AliESDtrack.h"
89ffc0b0 46#include "AliESDCaloCluster.h"
fe17d4cb 47#include "AliEMCALRecPoint.h"
48#include "AliRunLoader.h"
49#include "AliEMCALTrack.h"
50#include "AliEMCALLoader.h"
c61f0e70 51#include "AliEMCALGeometry.h"
8ba062b1 52#include "AliEMCALReconstructor.h"
53#include "AliEMCALRecParam.h"
54#include "AliCDBEntry.h"
55#include "AliCDBManager.h"
c61f0e70 56
fe17d4cb 57#include "AliEMCALTracker.h"
58
59ClassImp(AliEMCALTracker)
8ba062b1 60
fe17d4cb 61//
62//------------------------------------------------------------------------------
63//
64AliEMCALTracker::AliEMCALTracker()
65 : AliTracker(),
66 fNPropSteps(0),
67 fTrackCorrMode(kTrackCorrNone),
68 fCutX(50.0),
69 fCutY(50.0),
70 fCutZ(50.0),
71 fCutAlphaMin(-200.0),
72 fCutAlphaMax(200.0),
73 fCutAngle(100.0),
5a14e691 74 fMaxDist(10.0),
dcd86c5d 75 fCutNITS(3.0),
76 fCutNTPC(20.0),
fe17d4cb 77 fRho(1.0),
78 fX0(1.0),
79 fTracks(0),
80 fClusters(0),
c61f0e70 81 fMatches(0),
82 fGeom(0)
fe17d4cb 83{
84 //
85 // Default constructor.
86 // Initializes al simple data members to default values,
87 // and all collections to NULL.
88 // Output file name is set to a default value.
89 //
0832a2bf 90 InitParameters();
fe17d4cb 91}
92//
93//------------------------------------------------------------------------------
94//
95AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy)
96 : AliTracker(),
97 fNPropSteps(copy.fNPropSteps),
98 fTrackCorrMode(copy.fTrackCorrMode),
99 fCutX(copy.fCutX),
100 fCutY(copy.fCutY),
101 fCutZ(copy.fCutZ),
102 fCutAlphaMin(copy.fCutAlphaMin),
103 fCutAlphaMax(copy.fCutAlphaMax),
104 fCutAngle(copy.fCutAngle),
105 fMaxDist(copy.fMaxDist),
dcd86c5d 106 fCutNITS(copy.fCutNITS),
107 fCutNTPC(copy.fCutNTPC),
fe17d4cb 108 fRho(copy.fRho),
109 fX0(copy.fX0),
110 fTracks((TObjArray*)copy.fTracks->Clone()),
111 fClusters((TObjArray*)copy.fClusters->Clone()),
c61f0e70 112 fMatches((TList*)copy.fMatches->Clone()),
113 fGeom(copy.fGeom)
fe17d4cb 114{
115 //
116 // Copy constructor
117 // Besides copying all parameters, duplicates all collections.
118 //
119}
120//
121//------------------------------------------------------------------------------
122//
123AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& copy)
124{
125 //
126 // Assignment operator.
127 // Besides copying all parameters, duplicates all collections.
128 //
129
130 fCutX = copy.fCutX;
131 fCutY = copy.fCutY;
132 fCutZ = copy.fCutZ;
133 fCutAlphaMin = copy.fCutAlphaMin;
134 fCutAlphaMax = copy.fCutAlphaMax;
135 fCutAngle = copy.fCutAngle;
136 fMaxDist = copy.fMaxDist;
dcd86c5d 137 fCutNITS = copy.fCutNITS;
138 fCutNTPC = copy.fCutNTPC;
fe17d4cb 139
140 fTracks = (TObjArray*)copy.fTracks->Clone();
141 fClusters = (TObjArray*)copy.fClusters->Clone();
142 fMatches = (TList*)copy.fMatches->Clone();
143
c61f0e70 144 fGeom = copy.fGeom;
145
fe17d4cb 146 return (*this);
147}
148//
149//------------------------------------------------------------------------------
150//
8ba062b1 151void AliEMCALTracker::InitParameters()
152{
153 //
154 // Retrieve initialization parameters
155 //
156
157 // Check if the instance of AliEMCALRecParam exists,
3a2a23e1 158 const AliEMCALRecParam* recParam = new AliEMCALRecParam();
159
ba6de5ea 160 if(!recParam){
161 AliFatal("Reconstruction parameters for EMCAL not set!");
8ba062b1 162 }
163
ba6de5ea 164 fCutX = recParam->GetTrkCutX();
165 fCutY = recParam->GetTrkCutY();
166 fCutZ = recParam->GetTrkCutZ();
167 fMaxDist = recParam->GetTrkCutR();
168 fCutAngle = recParam->GetTrkCutAngle();
169 fCutAlphaMin = recParam->GetTrkCutAlphaMin();
170 fCutAlphaMax = recParam->GetTrkCutAlphaMax();
dcd86c5d 171 fCutNITS = recParam->GetTrkCutNITS();
172 fCutNTPC = recParam->GetTrkCutNTPC();
173
8ba062b1 174}
175//
176//------------------------------------------------------------------------------
177//
c61f0e70 178TTree* AliEMCALTracker::SearchTrueMatches()
179{
b9560ae2 180 //Search through the list of
181 //track match candidates and clusters
182 //and look for true matches
183 //
184 //
c61f0e70 185 if (!fClusters) return 0;
186 if (fClusters->IsEmpty()) return 0;
187 if (!fTracks) return 0;
188 if (fTracks->IsEmpty()) return 0;
189
190 TTree *outTree = new TTree("tree", "True matches from event");
191 Int_t indexT, indexC, label;
192 outTree->Branch("indexC", &indexC, "indexC/I");
193 outTree->Branch("indexT", &indexT, "indexT/I");
194 outTree->Branch("label", &label , "label/I");
195
196 Double_t dist;
197 Int_t ic, nClusters = (Int_t)fClusters->GetEntries();
198 Int_t it, nTracks = fTracks->GetEntries();
199
200 for (ic = 0; ic < nClusters; ic++) {
201 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
202 label = cluster->Label();
203 indexC = cluster->Index();
204 for (it = 0; it < nTracks; it++) {
205 AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it);
206 if (TMath::Abs(track->GetSeedLabel()) != label) continue;
207 dist = CheckPair(track, cluster);
208 if (dist <= fMaxDist) {
209 indexT = track->GetSeedIndex();
210 outTree->Fill();
211 }
212 }
213 }
214
215 return outTree;
216}
217//
218//------------------------------------------------------------------------------
219//
fe17d4cb 220void AliEMCALTracker::Clear(Option_t* option)
221{
222 //
223 // Clearing method
044225d9 224 // Deletes all objects in arrays and the arrays themselves
fe17d4cb 225 //
226
227 TString opt(option);
228 Bool_t clearTracks = opt.Contains("TRACKS");
229 Bool_t clearClusters = opt.Contains("CLUSTERS");
230 Bool_t clearMatches = opt.Contains("MATCHES");
231 if (opt.Contains("ALL")) {
232 clearTracks = kTRUE;
233 clearClusters = kTRUE;
234 clearMatches = kTRUE;
235 }
236
237 if (fTracks != 0x0 && clearTracks) {
044225d9 238 fTracks->Delete();
239 delete fTracks;
240 fTracks = 0;
fe17d4cb 241 }
242 if (fClusters != 0x0 && clearClusters) {
044225d9 243 fClusters->Delete();
244 delete fClusters;
245 fClusters = 0;
fe17d4cb 246 }
247 if (fMatches != 0x0 && clearMatches) {
044225d9 248 fMatches->Delete();
249 delete fMatches;
250 fMatches = 0;
fe17d4cb 251 }
252}
253//
254//------------------------------------------------------------------------------
255//
256Int_t AliEMCALTracker::LoadClusters(TTree *cTree)
257{
258 //
259 // Load EMCAL clusters in the form of AliEMCALRecPoint,
260 // from simulation temporary files.
261 // (When included in reconstruction chain, this method is used automatically)
262 //
263
264 Clear("CLUSTERS");
265
266 TBranch *branch = cTree->GetBranch("EMCALECARP");
267 if (!branch) {
c61f0e70 268 AliError("Can't get the branch with the EMCAL clusters");
fe17d4cb 269 return 1;
270 }
271
9596d957 272 TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000);
fe17d4cb 273 branch->SetAddress(&clusters);
fe17d4cb 274
275 cTree->GetEvent(0);
9596d957 276 Int_t nClusters = (Int_t)clusters->GetEntries();
fe17d4cb 277 fClusters = new TObjArray(0);
278 for (Int_t i = 0; i < nClusters; i++) {
279 AliEMCALRecPoint *cluster = (AliEMCALRecPoint*)clusters->At(i);
280 if (!cluster) continue;
8ada0ffe 281 if (cluster->GetClusterType() != AliESDCaloCluster::kEMCALClusterv1) continue;
fe17d4cb 282 AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
283 fClusters->AddLast(matchCluster);
284 }
3d9e8b15 285
2ad4424e 286 branch->SetAddress(0);
287 clusters->Delete();
288 delete clusters;
3d9e8b15 289 if (fClusters->IsEmpty())
9310749e 290 AliDebug(1,"No clusters collected");
2ad4424e 291
9310749e 292 AliDebug(1,Form("Collected %d clusters (RecPoints)", fClusters->GetEntries()));
fe17d4cb 293
294 return 0;
295}
296//
297//------------------------------------------------------------------------------
298//
af885e0f 299Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd)
fe17d4cb 300{
301 //
302 // Load EMCAL clusters in the form of AliESDCaloClusters,
303 // from an AliESD object.
304 //
305
306 // make sure that tracks/clusters collections are empty
307 Clear("CLUSTERS");
308
3a2a23e1 309 Int_t start = 0;
310 Int_t nClustersEMC = esd->GetNumberOfCaloClusters();
fe17d4cb 311 Int_t end = start + nClustersEMC;
312
313 fClusters = new TObjArray(0);
314
315 Int_t i;
316 for (i = start; i < end; i++) {
317 AliESDCaloCluster *cluster = esd->GetCaloCluster(i);
318 if (!cluster) continue;
3a2a23e1 319 if (!cluster->IsEMCAL()) continue ;
fe17d4cb 320 AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
321 fClusters->AddLast(matchCluster);
322 }
3d9e8b15 323 if (fClusters->IsEmpty())
9310749e 324 AliDebug(1,"No clusters collected");
fe17d4cb 325
9310749e 326 AliDebug(1,Form("Collected %d clusters from ESD", fClusters->GetEntries()));
fe17d4cb 327
328 return 0;
329}
330//
331//------------------------------------------------------------------------------
332//
af885e0f 333Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd)
fe17d4cb 334{
335 //
336 // Load ESD tracks.
337 //
338
339 Clear("TRACKS");
340
341 Int_t nTracks = esd->GetNumberOfTracks();
342 fTracks = new TObjArray(0);
343
344 Int_t i, j;
345 Bool_t isKink;
346 Double_t alpha;
347 for (i = 0; i < nTracks; i++) {
348 AliESDtrack *esdTrack = esd->GetTrack(i);
349 // set by default the value corresponding to "no match"
c61f0e70 350 esdTrack->SetEMCALcluster(kUnmatched);
fe17d4cb 351// if (esdTrack->GetLabel() < 0) continue;
352// if (!(esdTrack->GetStatus() & AliESDtrack::kTOFout)) continue;
353 isKink = kFALSE;
354 for (j = 0; j < 3; j++) {
c61f0e70 355 if (esdTrack->GetKinkIndex(j) != 0) isKink = kTRUE;
fe17d4cb 356 }
357 if (isKink) continue;
358 AliEMCALTrack *track = new AliEMCALTrack(*esdTrack);
c61f0e70 359 track->SetMass(0.13957018);
fe17d4cb 360 // check alpha and reject the tracks which fall outside EMCAL acceptance
361 alpha = track->GetAlpha() * TMath::RadToDeg();
362 if (alpha > -155.0 && alpha < 67.0) {
363 delete track;
364 continue;
365 }
c61f0e70 366// if (!PropagateToEMCAL(track)) {
367// delete track;
368// continue;
369// }
fe17d4cb 370 track->SetSeedIndex(i);
371 track->SetSeedLabel(esdTrack->GetLabel());
372 fTracks->AddLast(track);
373 }
374 if (fTracks->IsEmpty()) {
9310749e 375 AliDebug(1,"No tracks collected");
fe17d4cb 376 }
377
9310749e 378 AliDebug(1,Form("Collected %d tracks", fTracks->GetEntries()));
fe17d4cb 379
380 return 0;
381}
382//
383//------------------------------------------------------------------------------
384//
af885e0f 385Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd)
fe17d4cb 386{
387 //
388 // Main operation method.
389 // Gets external AliESD containing tracks to be matched.
390 // After executing match finding, stores in the same ESD object all infos
391 // and releases the object for further reconstruction steps.
392 //
3d9e8b15 393 //
394 // Note: should always return 0=OK, because otherwise all tracking
395 // is aborted for this event
396
fe17d4cb 397 if (!esd) {
398 AliError("NULL ESD passed");
399 return 1;
400 }
401
402 // step 1:
403 // if cluster array is empty, cluster are collected
404 // from the passed ESD, and work is done with ESDCaloClusters
c61f0e70 405 Int_t okLoadClusters, nClusters;
fe17d4cb 406 if (!fClusters || (fClusters && fClusters->IsEmpty())) {
fe17d4cb 407 okLoadClusters = LoadClusters(esd);
fe17d4cb 408 }
c61f0e70 409 nClusters = fClusters->GetEntries();
fe17d4cb 410
411 // step 2:
412 // collect ESD tracks
c61f0e70 413 Int_t okLoadTracks = LoadTracks(esd), nTracks;
fe17d4cb 414 if (okLoadTracks) return 3;
c61f0e70 415 nTracks = fTracks->GetEntries();
fe17d4cb 416
417 // step 3:
418 // each track is propagated to the "R" position of each cluster.
419 // The closest cluster is assigned as match.
420 // IF no clusters lie within the maximum allowed distance, no matches are assigned.
421 Int_t nMatches = CreateMatches();
422 if (!nMatches) {
9310749e 423 AliDebug(1,Form("#clusters = %d -- #tracks = %d --> No good matches found.", nClusters, nTracks));
3d9e8b15 424 return 0;
fe17d4cb 425 }
426 else {
9310749e 427 AliDebug(1,Form("#clusters = %d -- #tracks = %d --> Found %d matches.", nClusters, nTracks, nMatches));
fe17d4cb 428 }
429
430 // step 4:
431 // when more than 1 track share the same matched cluster, only the closest one is kept.
432 Int_t nRemoved = SolveCompetitions();
9310749e 433 AliDebug(1,Form("Removed %d duplicate matches", nRemoved));
fe17d4cb 434 if (nRemoved >= nMatches) {
435 AliError("Removed ALL matches! Check the algorithm or data. Nothing to save");
436 return 5;
437 }
438
439 // step 5:
440 // save obtained information setting the 'fEMCALindex' field of AliESDtrack object
c61f0e70 441 Int_t nSaved = 0, trackID, nGood = 0, nFake = 0;
fe17d4cb 442 TListIter iter(fMatches);
443 AliEMCALMatch *match = 0;
444 while ( (match = (AliEMCALMatch*)iter.Next()) ) {
445 if (!match->CanBeSaved()) continue;
446 AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(match->GetIndexT());
447 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(match->GetIndexC());
448 trackID = track->GetSeedIndex();
449 AliESDtrack *esdTrack = esd->GetTrack(trackID);
450 if (!esdTrack) continue;
dcd86c5d 451
452 // cut on its and tpc track hits
453 if(esdTrack->GetNcls(0)<=fCutNITS)continue;
454 if(esdTrack->GetNcls(1)<=fCutNTPC)continue;
455
c61f0e70 456 if (TMath::Abs(esdTrack->GetLabel()) == cluster->Label()) {
fe17d4cb 457 esdTrack->SetEMCALcluster(cluster->Index());
c61f0e70 458 nGood++;
fe17d4cb 459 }
460 else {
461 esdTrack->SetEMCALcluster(-cluster->Index());
c61f0e70 462 nFake++;
fe17d4cb 463 }
464 nSaved++;
465 }
466 /*
467 AliEMCALTrack *track = 0;
468 TObjArrayIter tracks(fTracks);
469 while ( (track = (AliEMCALTrack*)tracks.Next()) ) {
470 trackID = track->GetSeedIndex();
471 clusterID = track->GetMatchedClusterIndex();
472 AliESDtrack *esdTrack = esd->GetTrack(trackID);
473 if (!esdTrack) continue;
474 if (clusterID < 0) {
c61f0e70 475 esdTrack->SetEMCALcluster(kUnmatched);
fe17d4cb 476 }
477 else {
478 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(clusterID);
479 if (!cluster) continue;
480 if (esdTrack->GetLabel() == cluster->Label()) {
481 nGood++;
482 esdTrack->SetEMCALcluster(cluster->Index());
483 }
484 else {
485 esdTrack->SetEMCALcluster(-cluster->Index());
486 }
487 nSaved++;
488 }
489 }
490 */
9310749e 491 AliDebug(1,Form("Saved %d matches [%d good + %d fake]", nSaved, nGood, nFake));
fe17d4cb 492
493 return 0;
494}
495//
496//------------------------------------------------------------------------------
497//
498void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option)
499{
500 //
501 // Set track correction mode
502 // gest the choice in string format and converts into
503 // internal enum
504 //
505
506 TString opt(option);
507 opt.ToUpper();
508
509 if (!opt.CompareTo("NONE")) {
510 fTrackCorrMode = kTrackCorrNone;
511 }
512 else if (!opt.CompareTo("MMB")) {
513 fTrackCorrMode = kTrackCorrMMB;
514 }
515 else if (!opt.CompareTo("FIXED")) {
516 fTrackCorrMode = kTrackCorrFixed;
517 }
518 else {
519 cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl;
520 }
521}
522
523//
524//------------------------------------------------------------------------------
525//
526Double_t AliEMCALTracker::AngleDiff(Double_t angle1, Double_t angle2)
527{
528 //
529 // [PRIVATE]
530 // Given two angles in radiants, it converts them in the range 0-2pi
531 // then computes their true difference, i.e. if the difference a1-a2
532 // results to be larger than 180 degrees, it returns 360 - diff.
533 //
534
535 if (angle1 < 0.0) angle1 += TMath::TwoPi();
536 if (angle1 > TMath::TwoPi()) angle1 -= TMath::TwoPi();
537 if (angle2 < 0.0) angle2 += TMath::TwoPi();
538 if (angle2 > TMath::TwoPi()) angle2 -= TMath::TwoPi();
539
540 Double_t diff = TMath::Abs(angle1 - angle2);
541 if (diff > TMath::Pi()) diff = TMath::TwoPi() - diff;
542
543 if (angle2 > angle1) diff = -diff;
544
545 return diff;
546}
547//
548//------------------------------------------------------------------------------
549//
550Double_t AliEMCALTracker::CheckPair
551(AliEMCALTrack *track, AliEMCALMatchCluster *cl)
552{
553 //
554 // Given a track and a cluster,
555 // propagates the first to the radius of the second.
556 // Then, checks the propagation point against all cuts.
557 // If at least a cut is not passed, a valuer equal to
558 // twice the maximum allowed distance is passed (so the value returned
559 // will not be taken into account when creating matches)
560 //
561
562 // TEMP
563 Bool_t isTrue = kFALSE;
564// if (tr->GetSeedLabel() == cl->Label()) {
565// isTrue = kTRUE;
fe17d4cb 566// }
567
568 // copy track into temporary variable
569 AliEMCALTrack *tr = new AliEMCALTrack(*track);
570
571 Double_t distance = 2.0 * fMaxDist;
572
573 // check against cut on difference 'alpha - phi'
574 Double_t phi = TMath::ATan2(cl->Y(), cl->X());
575 phi = AngleDiff(phi, tr->GetAlpha());
5a14e691 576 if (phi < fCutAlphaMin || phi > fCutAlphaMax){
577 delete tr;
578 return distance;
579 }
fe17d4cb 580
581 // try to propagate to cluster radius
582 // (return the 'distance' value if it fails)
583 Double_t pos[3], &x = pos[0], &y = pos[1], &z = pos[2];
584 Double_t x0, rho;
585 tr->GetXYZ(pos);
586 Double_t rt = TMath::Sqrt(x*x + y*y);
587 Double_t rc = TMath::Sqrt(cl->X()*cl->X() + cl->Y()*cl->Y());
588
589 if (fTrackCorrMode == kTrackCorrMMB) {
590 Double_t pos1[3], pos2[3], param[6];
591 pos1[0] = x;
592 pos1[1] = y;
593 pos1[2] = z;
594 pos2[0] = cl->X();
595 pos2[1] = cl->Y();
596 pos2[2] = cl->Z();
c3c15772 597 MeanMaterialBudget(pos1, pos2, param);
598 rho = param[0]*param[4];
fe17d4cb 599 x0 = param[1];
600 }
601 else if (fTrackCorrMode == kTrackCorrFixed) {
602 rho = fRho;
603 x0 = fX0;
604 }
605 else {
606 rho = 0.0;
607 x0 = 0.0;
608 }
609 if (fNPropSteps) {
610 Int_t i;
611 Double_t r;
612 cout.setf(ios::fixed);
613 cout.precision(5);
614 if (isTrue) cout << "Init : " << rt << ' ' << x << ' ' << y << ' ' << z << endl;
615 for (i = 0; i < fNPropSteps; i++) {
616 r = rt + (rc - rt) * ((Double_t)(i+1)/(Double_t)fNPropSteps);
5a14e691 617 if (!tr->PropagateTo(r, x0, rho)){
618 delete tr;
619 return distance;
620 }
fe17d4cb 621 tr->GetXYZ(pos);
622 if (isTrue) cout << "Step : " << r << ' ' << x << ' ' << y << ' ' << z << endl;
623 }
624 if (isTrue) cout << "Clstr: " << rc << ' ' << cl->X() << ' ' << cl->Y() << ' ' << cl->Z() << endl;
625 }
626 else {
627 // when no steps are used, no correction makes sense
c61f0e70 628 //if (!tr->PropagateTo(rc, 0.0, 0.0)) return distance;
5a14e691 629 if (!tr->PropagateToGlobal(cl->X(), cl->Y(), cl->Z(), 0.0, 0.0)){
630 delete tr;
631 return distance;
632 }
c61f0e70 633 /*
634 Bool_t propOK = kFALSE;
635 cout << "START" << endl;
636 Double_t dist, rCHK, bestDist = 10000000.0;
637 for (Double_t rTMP = rc; rTMP> rc*0.95; rTMP -= 0.1) {
638 if (!tr->PropagateTo(rTMP)) continue;
639 propOK = kTRUE;
640 tr->GetXYZ(pos);
641 rCHK = TMath::Sqrt(x*x + y*y);
642 dist = TMath::Abs(rCHK - rc);
643 cout << rCHK << " vs. " << rc << endl;
644
645 if (TMath::Abs(rCHK - rc) < 0.01) break;
646 }
647 cout << "STOP" << endl;
648 if (!propOK) return distance;
649 */
fe17d4cb 650 }
651
652 // get global propagation of track at end of propagation
653 tr->GetXYZ(pos);
654
655 // check angle cut
656 TVector3 vc(cl->X(), cl->Y(), cl->Z());
657 TVector3 vt(x, y, z);
658 Double_t angle = TMath::Abs(vc.Angle(vt)) * TMath::RadToDeg();
c61f0e70 659 // check: where is the track?
660 Double_t r, phiT, phiC;
661 r = TMath::Sqrt(pos[0]*pos[0] + pos[1]*pos[1]);
662 phiT = TMath::ATan2(pos[1], pos[0]) * TMath::RadToDeg();
663 phiC = vc.Phi() * TMath::RadToDeg();
664 //cout << "Propagated R, phiT, phiC = " << r << ' ' << phiT << ' ' << phiC << endl;
665
fe17d4cb 666 if (angle > fCutAngle) {
667 //cout << "angle" << endl;
5a14e691 668 delete tr;
fe17d4cb 669 return distance;
670 }
671
672 // compute differences wr to each coordinate
673 x -= cl->X();
c61f0e70 674 if (TMath::Abs(x) > fCutX) {
fe17d4cb 675 //cout << "cut X" << endl;
5a14e691 676 delete tr;
fe17d4cb 677 return distance;
678 }
679 y -= cl->Y();
c61f0e70 680 if (TMath::Abs(y) > fCutY) {
fe17d4cb 681 //cout << "cut Y" << endl;
5a14e691 682 delete tr;
fe17d4cb 683 return distance;
684 }
685 z -= cl->Z();
c61f0e70 686 if (TMath::Abs(z) > fCutZ) {
fe17d4cb 687 //cout << "cut Z" << endl;
5a14e691 688 delete tr;
fe17d4cb 689 return distance;
690 }
691
692 // compute true distance
693 distance = TMath::Sqrt(x*x + y*y + z*z);
694 //Double_t temp = CheckPairV2(tr, cl);
695 //if (temp < distance) return temp; else
696
697 // delete temporary object
698 delete tr;
699
700 return distance;
701}
702//
703//------------------------------------------------------------------------------
704//
705Double_t AliEMCALTracker::CheckPairV2
706(AliEMCALTrack *tr, AliEMCALMatchCluster *cl)
707{
708 //
709 // Given a track and a cluster,
710 // propagates the first to the radius of the second.
711 // Then, checks the propagation point against all cuts.
712 // If at least a cut is not passed, a valuer equal to
713 // twice the maximum allowed distance is passed (so the value returned
714 // will not be taken into account when creating matches)
715 //
716
717 // TEMP
718// Bool_t isTrue = kFALSE;
719// if (tr->GetSeedLabel() == cl->Label()) {
720// isTrue = kTRUE;
721// cout << "TRUE MATCH!!!" << endl;
722// }
723
724 Double_t distance = 2.0 * fMaxDist;
725
726 Double_t x0, rho;
727 if (fTrackCorrMode == kTrackCorrMMB) {
728 Double_t pos1[3], pos2[3], param[6];
729 tr->GetXYZ(pos1);
730// pos1[0] = x;
731// pos1[1] = y;
732// pos1[2] = z;
733 pos2[0] = cl->X();
734 pos2[1] = cl->Y();
735 pos2[2] = cl->Z();
c3c15772 736 MeanMaterialBudget(pos1, pos2, param);
737 rho = param[0]*param[4];
fe17d4cb 738 x0 = param[1];
739 }
740 else if (fTrackCorrMode == kTrackCorrFixed) {
741 rho = fRho;
742 x0 = fX0;
743 }
744 else {
745 rho = 0.0;
746 x0 = 0.0;
747 }
748
749 // check against cut on difference 'alpha - phi'
750 Double_t phi = TMath::ATan2(cl->Y(), cl->X());
751 phi = AngleDiff(phi, tr->GetAlpha());
752 if (phi < fCutAlphaMin || phi > fCutAlphaMax) return distance;
753
754 // get cluster position and put them into a vector
755 TVector3 vc(cl->X(), cl->Y(), cl->Z());
756 // rotate the vector in order to put all clusters on a plane intersecting
757 // vertically the X axis; the angle depends on the sector
758 Double_t clusterRot, clusterPhi = vc.Phi() * TMath::RadToDeg();
759 if (clusterPhi < 0.0) clusterPhi += 360.0;
760 if (clusterPhi < 100.0) {
761 clusterRot = -90.0;
762 }
763 else if (clusterPhi < 120.0) {
764 clusterRot = -110.0;
765 }
766 else if (clusterPhi < 140.0) {
767 clusterRot = -130.0;
768 }
769 else if (clusterPhi < 160.0) {
770 clusterRot = -150.0;
771 }
772 else if (clusterPhi < 180.0) {
773 clusterRot = -170.0;
774 }
775 else {
776 clusterRot = -190.0;
777 }
778 vc.RotateZ(clusterRot * TMath::DegToRad());
779 // generate a track from the ESD track selected
780 AliEMCALTrack *track = new AliEMCALTrack(*tr);
781 // compute the 'phi' coordinate of the intersection point to
782 // the EMCAL surface
783 Double_t x = vc.X();
784 Double_t y;
785 track->GetYAt(vc.X(), track->GetBz(), y);
786 Double_t tmp = x*TMath::Cos(track->GetAlpha()) - y*TMath::Sin(track->GetAlpha());
787 y = x*TMath::Sin(track->GetAlpha()) + y*TMath::Cos(track->GetAlpha());
788 x = tmp;
789 Double_t trackPhi = TMath::ATan2(y, x) * TMath::RadToDeg();
790 // compute phi difference
791 Double_t dphi = trackPhi - clusterPhi;
792 if (TMath::Abs(dphi) > 180.0) {
793 dphi = 360.0 - TMath::Abs(dphi);
794 if (clusterPhi > trackPhi) dphi = -dphi;
795 }
796 // propagate track to the X position of rotated cluster
797 // and get the vector of X, Y, Z in the local ref. frame of the track
798 track->PropagateTo(vc.X(), x0, rho);
799 TVector3 vt(track->GetX(), track->GetY(), track->GetZ());
800 vt.RotateZ((clusterPhi - trackPhi) * TMath::DegToRad());
801 TVector3 vdiff = vt-vc;
802
803 // compute differences wr to each coordinate
5a14e691 804 delete track;
fe17d4cb 805 if (vdiff.X() > fCutX) return distance;
806 if (vdiff.Y() > fCutY) return distance;
807 if (vdiff.Z() > fCutZ) return distance;
808
809 // compute true distance
810 distance = vdiff.Mag();
811 return distance;
812}
813//
814//------------------------------------------------------------------------------
815//
c61f0e70 816Double_t AliEMCALTracker::CheckPairV3
817(AliEMCALTrack *track, AliEMCALMatchCluster *cl)
818{
819 //
820 // Given a track and a cluster,
821 // propagates the first to the radius of the second.
822 // Then, checks the propagation point against all cuts.
823 // If at least a cut is not passed, a valuer equal to
824 // twice the maximum allowed distance is passed (so the value returned
825 // will not be taken into account when creating matches)
826 //
827
828 AliEMCALTrack tr(*track);
829
830 Int_t sector;
831 Double_t distance = 2.0 * fMaxDist;
832 Double_t dx, dy, dz;
833 Double_t phi, alpha, slope, tgtXnum, tgtXden, sectorWidth = 20.0 * TMath::DegToRad();
e77c61fe 834 Double_t xcurr, xprop, param[6] = {0., 0., 0., 0., 0., 0.}, x0, rho, bz;
c61f0e70 835 Double_t x[3], x1[3], x2[3];
836
837 // get initial track position
838 xcurr = tr.GetX();
839
840 // evaluate the EMCAL sector number
841 phi = cl->Phi();
842 if (phi < 0.0) phi += TMath::TwoPi();
843 sector = (Int_t)(phi / sectorWidth);
844 alpha = ((Double_t)sector + 0.5) * sectorWidth;
845 // evaluate the corresponding X for track propagation
846 slope = TMath::Tan(alpha - 0.5*TMath::Pi());
847 tgtXnum = cl->Y() - slope * cl->X();
848 tgtXden = TMath::Sqrt(1.0 + slope*slope);
849 xprop = TMath::Abs(tgtXnum / tgtXden);
850
851 // propagate by small steps
852 tr.GetXYZ(x1);
853 bz = tr.GetBz();
854 if (!tr.GetXYZAt(xprop, bz, x2)) return distance;
855 //AliKalmanTrack::MeanMaterialBudget(x1, x2, param);
e77c61fe 856 rho = param[0]*param[4];
c61f0e70 857 x0 = param[1];
e77c61fe 858 if (!tr.PropagateTo(xprop, x0, rho)) return distance;
c61f0e70 859 //if (!tr.PropagateTo(xprop, 0.0, 0.0)) return distance;
860
861 // get propagated position at the end
862 tr.GetXYZ(x);
863 dx = TMath::Abs(x[0] - cl->X());
864 dy = TMath::Abs(x[1] - cl->Y());
865 dz = TMath::Abs(x[2] - cl->Z());
866 if (dx > fCutX || dy > fCutY || dz > fCutZ) return distance;
867
868 distance = TMath::Sqrt(dx*dx + dy*dy + dz*dz);
869
870 return distance;
871}
872//
873//------------------------------------------------------------------------------
874//
875Bool_t AliEMCALTracker::PropagateToEMCAL(AliEMCALTrack *tr)
876{
877 //
878 // Propagates the track to the proximity of the EMCAL surface
879 //
880
e77c61fe 881 Double_t xcurr, xtemp, xprop = 438.0, step = 10.0, param[6], x0, rho, bz;
c61f0e70 882 Double_t x1[3], x2[3];
883
884 // get initial track position
885 xcurr = tr->GetX();
886
887 // propagate by small steps
888 for (xtemp = xcurr + step; xtemp < xprop; xtemp += step) {
889 // to compute material budget, take current position and
890 // propagated hypothesis without energy loss
891 tr->GetXYZ(x1);
892 bz = tr->GetBz();
893 if (!tr->GetXYZAt(xtemp, bz, x2)) return kFALSE;
c3c15772 894 MeanMaterialBudget(x1, x2, param);
895 rho = param[0]*param[4];
c61f0e70 896 x0 = param[1];
e77c61fe 897 if (!tr->PropagateTo(xtemp, x0, rho)) return kFALSE;
c61f0e70 898 }
899
900 return kTRUE;
901}
902//
903//------------------------------------------------------------------------------
904//
fe17d4cb 905Int_t AliEMCALTracker::CreateMatches()
906{
907 //
908 // Creation of matches between tracks and clusters.
909 // For each ESD track collected by ReadESD(), an AliEMCALTrack is made.
910 // If it finds a cluster close enough to its propagation to EMCAL,
911 // which passes all cuts, its index is stored.
912 // If many clusters are found which satisfy the criteria described above,
913 // only the closest one is stored.
914 // At this level, it is possible that two tracks share the same cluster.
915 //
916
917 // if matches collection is already present, it is deleted
918 if (fMatches) {
919 fMatches->Delete();
920 delete fMatches;
921 }
922 fMatches = new TList;
923
924 // initialize counters and indexes
925 Int_t count = 0;
926 Int_t ic, nClusters = (Int_t)fClusters->GetEntries();
927 Int_t it, nTracks = fTracks->GetEntries();
928
929 // external loop on clusters, internal loop on tracks
930 Double_t dist;
931 for (ic = 0; ic < nClusters; ic++) {
fe17d4cb 932 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
933 for (it = 0; it < nTracks; it++) {
934 AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it);
935 dist = CheckPair(track, cluster);
c61f0e70 936 //cout << dist << endl;
fe17d4cb 937 if (dist <= fMaxDist) {
938 AliEMCALMatch *candidate = new AliEMCALMatch;
939 candidate->SetIndexT(it);
940 candidate->SetIndexC(ic);
941 candidate->SetDistance(dist);
6c23ffed 942 candidate->SetPt(track->GetSignedPt());
fe17d4cb 943 fMatches->Add(candidate);
944 count++;
945 }
946 }
947 }
fe17d4cb 948
949 return count;
950}
951//
952//------------------------------------------------------------------------------
953//
954Int_t AliEMCALTracker::SolveCompetitions()
955{
956 //
957 // Match selector.
958 // The match list is sorted from the best to the worst match, w.r. to the
959 // distance between track prolongation and cluster position.
960 // Based on this criterion, starting from the first (best) match, a flag
961 // is set to both the involved track and cluster, and all matches containing
962 // an already used track or cluster are removed, leaving only the best match
963 // for each cluster.
964 //
965
966 // sort matches with respect to track-cluster distance
967 fMatches->Sort(kSortAscending);
968
969 // keep track of eliminated matches
970 Int_t count = 0;
971
972 // initialize flags to check repetitions
973 Int_t ic, nClusters = (Int_t)fClusters->GetEntries();
974 Int_t it, nTracks = fTracks->GetEntries();
975 Bool_t *usedC = new Bool_t[nClusters];
976 Bool_t *usedT = new Bool_t[nTracks];
977 for (ic = 0; ic < nClusters; ic++) usedC[ic] = kFALSE;
978 for (it = 0; it < nTracks; it++) usedT[it] = kFALSE;
979
980 // loop on matches
981 TListIter iter(fMatches);
982 AliEMCALMatch *match = 0;
983 while ( (match = (AliEMCALMatch*)iter.Next()) ) {
984 ic = match->GetIndexC();
985 it = match->GetIndexT();
986 if (!usedT[it] && !usedC[ic]) {
987 usedT[it] = kTRUE;
988 usedC[ic] = kTRUE;
989 match->CanBeSaved() = kTRUE;
990 }
991 else {
992 count++;
993 }
994 }
995
17773e2e 996 delete [] usedC;
997 delete [] usedT;
998
fe17d4cb 999 return count;
1000}
1001//
1002//------------------------------------------------------------------------------
1003//
1004void AliEMCALTracker::UnloadClusters()
1005{
1006 //
044225d9 1007 // Free memory from all arrays
1008 // This method is called after the local tracking step
1009 // so we can safely delete everything
fe17d4cb 1010 //
1011
044225d9 1012 Clear();
fe17d4cb 1013}
04475328 1014//
1015//------------------------------------------------------------------------------
1016//
1017TVector3 AliEMCALTracker::FindExtrapolationPoint(Double_t x,Double_t y,Double_t z, AliESDtrack *track)
1018{
1019 //Method to determine extrapolation point of track at location x,y,z
1020 AliEMCALTrack *tr = new AliEMCALTrack(*track);
1021 TVector3 error(-100.,-100.,-100.);
1022 if (!tr->PropagateToGlobal(x,y,z, 0.0, 0.0)) {
1023 return error;
1024 }
1025 Double_t pos[3];
1026 tr->GetXYZ(pos);
1027 TVector3 ExTrPos(pos[0],pos[1],pos[2]);
1028 return ExTrPos;
1029}
1030
fe17d4cb 1031//
1032//------------------------------------------------------------------------------
1033//
1034AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint)
1035 : fIndex(index),
0f7fcbef 1036 fLabel(recPoint->GetPrimaryIndex()), //wrong! fixed below
fe17d4cb 1037 fX(0.),
1038 fY(0.),
1039 fZ(0.)
1040{
1041 //
1042 // Translates an AliEMCALRecPoint object into the internal format.
1043 // Index of passed cluster in its native array must be specified.
1044 //
1045 TVector3 clpos;
1046 recPoint->GetGlobalPosition(clpos);
1047
1048 fX = clpos.X();
1049 fY = clpos.Y();
1050 fZ = clpos.Z();
0f7fcbef 1051
1052 //AliEMCALRecPoint stores the track labels in the parents
1053 //list, sorted according to the fractional contribution to the
1054 //RecPoint. The zeroth parent gave the highest contribution
1055 Int_t multparent = 0;
1056 Int_t *parents = recPoint->GetParents(multparent);
1057 if(multparent > 0)
1058 fLabel = parents[0];
1059 else
1060 fLabel = -1;
1061
fe17d4cb 1062}
1063//
1064//------------------------------------------------------------------------------
1065//
1066AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster)
1067 : fIndex(index),
7592dfc4 1068 fLabel(caloCluster->GetLabel()),
fe17d4cb 1069 fX(0.),
1070 fY(0.),
1071 fZ(0.)
1072{
1073 //
1074 // Translates an AliESDCaloCluster object into the internal format.
1075 // Index of passed cluster in its native array must be specified.
1076 //
1077 Float_t clpos[3];
7592dfc4 1078 caloCluster->GetPosition(clpos);
fe17d4cb 1079
1080 fX = (Double_t)clpos[0];
1081 fY = (Double_t)clpos[1];
1082 fZ = (Double_t)clpos[2];
1083}
1084//
1085//------------------------------------------------------------------------------
1086//
1087Int_t AliEMCALTracker::AliEMCALMatch::Compare(const TObject *obj) const
1088{
1089 //
1090 // Tracks compared wrt their distance from matched point
1091 //
1092
1093 AliEMCALTracker::AliEMCALMatch *that = (AliEMCALTracker::AliEMCALMatch*)obj;
1094
c61f0e70 1095 Double_t thisDist = fPt;//fDistance;
1096 Double_t thatDist = that->fPt;//that->GetDistance();
fe17d4cb 1097
1098 if (thisDist > thatDist) return 1;
1099 else if (thisDist < thatDist) return -1;
1100 return 0;
1101}
1102
1103AliEMCALTracker::AliEMCALMatch::AliEMCALMatch()
1104 : TObject(),
1105 fCanBeSaved(kFALSE),
1106 fIndexC(0),
1107 fIndexT(0),
c61f0e70 1108 fDistance(0.),
1109 fPt(0.)
fe17d4cb 1110{
1111 //default constructor
1112
1113}
1114
1115AliEMCALTracker::AliEMCALMatch::AliEMCALMatch(const AliEMCALMatch& copy)
1116 : TObject(),
1117 fCanBeSaved(copy.fCanBeSaved),
1118 fIndexC(copy.fIndexC),
1119 fIndexT(copy.fIndexT),
c61f0e70 1120 fDistance(copy.fDistance),
1121 fPt(copy.fPt)
fe17d4cb 1122{
1123 //copy ctor
1124}