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move AliEMCALHistoUtilities from base to Utils library, remove call of this class...
[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
33eb9693 441 Int_t nSaved = 0, trackID;
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;
33eb9693 455
456 esdTrack->SetEMCALcluster(cluster->Index());
fe17d4cb 457 nSaved++;
458 }
459 /*
460 AliEMCALTrack *track = 0;
461 TObjArrayIter tracks(fTracks);
462 while ( (track = (AliEMCALTrack*)tracks.Next()) ) {
463 trackID = track->GetSeedIndex();
464 clusterID = track->GetMatchedClusterIndex();
465 AliESDtrack *esdTrack = esd->GetTrack(trackID);
466 if (!esdTrack) continue;
467 if (clusterID < 0) {
c61f0e70 468 esdTrack->SetEMCALcluster(kUnmatched);
fe17d4cb 469 }
470 else {
471 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(clusterID);
472 if (!cluster) continue;
33eb9693 473
474 esdTrack->SetEMCALcluster(cluster->Index());
fe17d4cb 475 nSaved++;
476 }
477 }
478 */
33eb9693 479 AliDebug(1,Form("Saved %d matches", nSaved));
fe17d4cb 480
481 return 0;
482}
483//
484//------------------------------------------------------------------------------
485//
486void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option)
487{
488 //
489 // Set track correction mode
490 // gest the choice in string format and converts into
491 // internal enum
492 //
493
494 TString opt(option);
495 opt.ToUpper();
496
497 if (!opt.CompareTo("NONE")) {
498 fTrackCorrMode = kTrackCorrNone;
499 }
500 else if (!opt.CompareTo("MMB")) {
501 fTrackCorrMode = kTrackCorrMMB;
502 }
503 else if (!opt.CompareTo("FIXED")) {
504 fTrackCorrMode = kTrackCorrFixed;
505 }
506 else {
507 cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl;
508 }
509}
510
511//
512//------------------------------------------------------------------------------
513//
514Double_t AliEMCALTracker::AngleDiff(Double_t angle1, Double_t angle2)
515{
516 //
517 // [PRIVATE]
518 // Given two angles in radiants, it converts them in the range 0-2pi
519 // then computes their true difference, i.e. if the difference a1-a2
520 // results to be larger than 180 degrees, it returns 360 - diff.
521 //
522
523 if (angle1 < 0.0) angle1 += TMath::TwoPi();
524 if (angle1 > TMath::TwoPi()) angle1 -= TMath::TwoPi();
525 if (angle2 < 0.0) angle2 += TMath::TwoPi();
526 if (angle2 > TMath::TwoPi()) angle2 -= TMath::TwoPi();
527
528 Double_t diff = TMath::Abs(angle1 - angle2);
529 if (diff > TMath::Pi()) diff = TMath::TwoPi() - diff;
530
531 if (angle2 > angle1) diff = -diff;
532
533 return diff;
534}
535//
536//------------------------------------------------------------------------------
537//
538Double_t AliEMCALTracker::CheckPair
539(AliEMCALTrack *track, AliEMCALMatchCluster *cl)
540{
541 //
542 // Given a track and a cluster,
543 // propagates the first to the radius of the second.
544 // Then, checks the propagation point against all cuts.
545 // If at least a cut is not passed, a valuer equal to
546 // twice the maximum allowed distance is passed (so the value returned
547 // will not be taken into account when creating matches)
548 //
549
550 // TEMP
551 Bool_t isTrue = kFALSE;
552// if (tr->GetSeedLabel() == cl->Label()) {
553// isTrue = kTRUE;
fe17d4cb 554// }
555
556 // copy track into temporary variable
557 AliEMCALTrack *tr = new AliEMCALTrack(*track);
558
559 Double_t distance = 2.0 * fMaxDist;
560
561 // check against cut on difference 'alpha - phi'
562 Double_t phi = TMath::ATan2(cl->Y(), cl->X());
563 phi = AngleDiff(phi, tr->GetAlpha());
5a14e691 564 if (phi < fCutAlphaMin || phi > fCutAlphaMax){
565 delete tr;
566 return distance;
567 }
fe17d4cb 568
569 // try to propagate to cluster radius
570 // (return the 'distance' value if it fails)
571 Double_t pos[3], &x = pos[0], &y = pos[1], &z = pos[2];
572 Double_t x0, rho;
573 tr->GetXYZ(pos);
574 Double_t rt = TMath::Sqrt(x*x + y*y);
575 Double_t rc = TMath::Sqrt(cl->X()*cl->X() + cl->Y()*cl->Y());
576
577 if (fTrackCorrMode == kTrackCorrMMB) {
578 Double_t pos1[3], pos2[3], param[6];
579 pos1[0] = x;
580 pos1[1] = y;
581 pos1[2] = z;
582 pos2[0] = cl->X();
583 pos2[1] = cl->Y();
584 pos2[2] = cl->Z();
c3c15772 585 MeanMaterialBudget(pos1, pos2, param);
586 rho = param[0]*param[4];
fe17d4cb 587 x0 = param[1];
588 }
589 else if (fTrackCorrMode == kTrackCorrFixed) {
590 rho = fRho;
591 x0 = fX0;
592 }
593 else {
594 rho = 0.0;
595 x0 = 0.0;
596 }
597 if (fNPropSteps) {
598 Int_t i;
599 Double_t r;
600 cout.setf(ios::fixed);
601 cout.precision(5);
602 if (isTrue) cout << "Init : " << rt << ' ' << x << ' ' << y << ' ' << z << endl;
603 for (i = 0; i < fNPropSteps; i++) {
604 r = rt + (rc - rt) * ((Double_t)(i+1)/(Double_t)fNPropSteps);
5a14e691 605 if (!tr->PropagateTo(r, x0, rho)){
606 delete tr;
607 return distance;
608 }
fe17d4cb 609 tr->GetXYZ(pos);
610 if (isTrue) cout << "Step : " << r << ' ' << x << ' ' << y << ' ' << z << endl;
611 }
612 if (isTrue) cout << "Clstr: " << rc << ' ' << cl->X() << ' ' << cl->Y() << ' ' << cl->Z() << endl;
613 }
614 else {
615 // when no steps are used, no correction makes sense
c61f0e70 616 //if (!tr->PropagateTo(rc, 0.0, 0.0)) return distance;
5a14e691 617 if (!tr->PropagateToGlobal(cl->X(), cl->Y(), cl->Z(), 0.0, 0.0)){
618 delete tr;
619 return distance;
620 }
c61f0e70 621 /*
622 Bool_t propOK = kFALSE;
623 cout << "START" << endl;
624 Double_t dist, rCHK, bestDist = 10000000.0;
625 for (Double_t rTMP = rc; rTMP> rc*0.95; rTMP -= 0.1) {
626 if (!tr->PropagateTo(rTMP)) continue;
627 propOK = kTRUE;
628 tr->GetXYZ(pos);
629 rCHK = TMath::Sqrt(x*x + y*y);
630 dist = TMath::Abs(rCHK - rc);
631 cout << rCHK << " vs. " << rc << endl;
632
633 if (TMath::Abs(rCHK - rc) < 0.01) break;
634 }
635 cout << "STOP" << endl;
636 if (!propOK) return distance;
637 */
fe17d4cb 638 }
639
640 // get global propagation of track at end of propagation
641 tr->GetXYZ(pos);
642
643 // check angle cut
644 TVector3 vc(cl->X(), cl->Y(), cl->Z());
645 TVector3 vt(x, y, z);
646 Double_t angle = TMath::Abs(vc.Angle(vt)) * TMath::RadToDeg();
c61f0e70 647 // check: where is the track?
648 Double_t r, phiT, phiC;
649 r = TMath::Sqrt(pos[0]*pos[0] + pos[1]*pos[1]);
650 phiT = TMath::ATan2(pos[1], pos[0]) * TMath::RadToDeg();
651 phiC = vc.Phi() * TMath::RadToDeg();
652 //cout << "Propagated R, phiT, phiC = " << r << ' ' << phiT << ' ' << phiC << endl;
653
fe17d4cb 654 if (angle > fCutAngle) {
655 //cout << "angle" << endl;
5a14e691 656 delete tr;
fe17d4cb 657 return distance;
658 }
659
660 // compute differences wr to each coordinate
661 x -= cl->X();
c61f0e70 662 if (TMath::Abs(x) > fCutX) {
fe17d4cb 663 //cout << "cut X" << endl;
5a14e691 664 delete tr;
fe17d4cb 665 return distance;
666 }
667 y -= cl->Y();
c61f0e70 668 if (TMath::Abs(y) > fCutY) {
fe17d4cb 669 //cout << "cut Y" << endl;
5a14e691 670 delete tr;
fe17d4cb 671 return distance;
672 }
673 z -= cl->Z();
c61f0e70 674 if (TMath::Abs(z) > fCutZ) {
fe17d4cb 675 //cout << "cut Z" << endl;
5a14e691 676 delete tr;
fe17d4cb 677 return distance;
678 }
679
680 // compute true distance
681 distance = TMath::Sqrt(x*x + y*y + z*z);
682 //Double_t temp = CheckPairV2(tr, cl);
683 //if (temp < distance) return temp; else
684
685 // delete temporary object
686 delete tr;
687
688 return distance;
689}
690//
691//------------------------------------------------------------------------------
692//
693Double_t AliEMCALTracker::CheckPairV2
694(AliEMCALTrack *tr, AliEMCALMatchCluster *cl)
695{
696 //
697 // Given a track and a cluster,
698 // propagates the first to the radius of the second.
699 // Then, checks the propagation point against all cuts.
700 // If at least a cut is not passed, a valuer equal to
701 // twice the maximum allowed distance is passed (so the value returned
702 // will not be taken into account when creating matches)
703 //
704
705 // TEMP
706// Bool_t isTrue = kFALSE;
707// if (tr->GetSeedLabel() == cl->Label()) {
708// isTrue = kTRUE;
709// cout << "TRUE MATCH!!!" << endl;
710// }
711
712 Double_t distance = 2.0 * fMaxDist;
713
714 Double_t x0, rho;
715 if (fTrackCorrMode == kTrackCorrMMB) {
716 Double_t pos1[3], pos2[3], param[6];
717 tr->GetXYZ(pos1);
718// pos1[0] = x;
719// pos1[1] = y;
720// pos1[2] = z;
721 pos2[0] = cl->X();
722 pos2[1] = cl->Y();
723 pos2[2] = cl->Z();
c3c15772 724 MeanMaterialBudget(pos1, pos2, param);
725 rho = param[0]*param[4];
fe17d4cb 726 x0 = param[1];
727 }
728 else if (fTrackCorrMode == kTrackCorrFixed) {
729 rho = fRho;
730 x0 = fX0;
731 }
732 else {
733 rho = 0.0;
734 x0 = 0.0;
735 }
736
737 // check against cut on difference 'alpha - phi'
738 Double_t phi = TMath::ATan2(cl->Y(), cl->X());
739 phi = AngleDiff(phi, tr->GetAlpha());
740 if (phi < fCutAlphaMin || phi > fCutAlphaMax) return distance;
741
742 // get cluster position and put them into a vector
743 TVector3 vc(cl->X(), cl->Y(), cl->Z());
744 // rotate the vector in order to put all clusters on a plane intersecting
745 // vertically the X axis; the angle depends on the sector
746 Double_t clusterRot, clusterPhi = vc.Phi() * TMath::RadToDeg();
747 if (clusterPhi < 0.0) clusterPhi += 360.0;
748 if (clusterPhi < 100.0) {
749 clusterRot = -90.0;
750 }
751 else if (clusterPhi < 120.0) {
752 clusterRot = -110.0;
753 }
754 else if (clusterPhi < 140.0) {
755 clusterRot = -130.0;
756 }
757 else if (clusterPhi < 160.0) {
758 clusterRot = -150.0;
759 }
760 else if (clusterPhi < 180.0) {
761 clusterRot = -170.0;
762 }
763 else {
764 clusterRot = -190.0;
765 }
766 vc.RotateZ(clusterRot * TMath::DegToRad());
767 // generate a track from the ESD track selected
768 AliEMCALTrack *track = new AliEMCALTrack(*tr);
769 // compute the 'phi' coordinate of the intersection point to
770 // the EMCAL surface
771 Double_t x = vc.X();
772 Double_t y;
773 track->GetYAt(vc.X(), track->GetBz(), y);
774 Double_t tmp = x*TMath::Cos(track->GetAlpha()) - y*TMath::Sin(track->GetAlpha());
775 y = x*TMath::Sin(track->GetAlpha()) + y*TMath::Cos(track->GetAlpha());
776 x = tmp;
777 Double_t trackPhi = TMath::ATan2(y, x) * TMath::RadToDeg();
778 // compute phi difference
779 Double_t dphi = trackPhi - clusterPhi;
780 if (TMath::Abs(dphi) > 180.0) {
781 dphi = 360.0 - TMath::Abs(dphi);
782 if (clusterPhi > trackPhi) dphi = -dphi;
783 }
784 // propagate track to the X position of rotated cluster
785 // and get the vector of X, Y, Z in the local ref. frame of the track
786 track->PropagateTo(vc.X(), x0, rho);
787 TVector3 vt(track->GetX(), track->GetY(), track->GetZ());
788 vt.RotateZ((clusterPhi - trackPhi) * TMath::DegToRad());
789 TVector3 vdiff = vt-vc;
790
791 // compute differences wr to each coordinate
5a14e691 792 delete track;
fe17d4cb 793 if (vdiff.X() > fCutX) return distance;
794 if (vdiff.Y() > fCutY) return distance;
795 if (vdiff.Z() > fCutZ) return distance;
796
797 // compute true distance
798 distance = vdiff.Mag();
799 return distance;
800}
801//
802//------------------------------------------------------------------------------
803//
c61f0e70 804Double_t AliEMCALTracker::CheckPairV3
805(AliEMCALTrack *track, AliEMCALMatchCluster *cl)
806{
807 //
808 // Given a track and a cluster,
809 // propagates the first to the radius of the second.
810 // Then, checks the propagation point against all cuts.
811 // If at least a cut is not passed, a valuer equal to
812 // twice the maximum allowed distance is passed (so the value returned
813 // will not be taken into account when creating matches)
814 //
815
816 AliEMCALTrack tr(*track);
817
818 Int_t sector;
819 Double_t distance = 2.0 * fMaxDist;
820 Double_t dx, dy, dz;
821 Double_t phi, alpha, slope, tgtXnum, tgtXden, sectorWidth = 20.0 * TMath::DegToRad();
e77c61fe 822 Double_t xcurr, xprop, param[6] = {0., 0., 0., 0., 0., 0.}, x0, rho, bz;
c61f0e70 823 Double_t x[3], x1[3], x2[3];
824
825 // get initial track position
826 xcurr = tr.GetX();
827
828 // evaluate the EMCAL sector number
829 phi = cl->Phi();
830 if (phi < 0.0) phi += TMath::TwoPi();
831 sector = (Int_t)(phi / sectorWidth);
832 alpha = ((Double_t)sector + 0.5) * sectorWidth;
833 // evaluate the corresponding X for track propagation
834 slope = TMath::Tan(alpha - 0.5*TMath::Pi());
835 tgtXnum = cl->Y() - slope * cl->X();
836 tgtXden = TMath::Sqrt(1.0 + slope*slope);
837 xprop = TMath::Abs(tgtXnum / tgtXden);
838
839 // propagate by small steps
840 tr.GetXYZ(x1);
841 bz = tr.GetBz();
842 if (!tr.GetXYZAt(xprop, bz, x2)) return distance;
843 //AliKalmanTrack::MeanMaterialBudget(x1, x2, param);
e77c61fe 844 rho = param[0]*param[4];
c61f0e70 845 x0 = param[1];
e77c61fe 846 if (!tr.PropagateTo(xprop, x0, rho)) return distance;
c61f0e70 847 //if (!tr.PropagateTo(xprop, 0.0, 0.0)) return distance;
848
849 // get propagated position at the end
850 tr.GetXYZ(x);
851 dx = TMath::Abs(x[0] - cl->X());
852 dy = TMath::Abs(x[1] - cl->Y());
853 dz = TMath::Abs(x[2] - cl->Z());
854 if (dx > fCutX || dy > fCutY || dz > fCutZ) return distance;
855
856 distance = TMath::Sqrt(dx*dx + dy*dy + dz*dz);
857
858 return distance;
859}
860//
861//------------------------------------------------------------------------------
862//
863Bool_t AliEMCALTracker::PropagateToEMCAL(AliEMCALTrack *tr)
864{
865 //
866 // Propagates the track to the proximity of the EMCAL surface
867 //
868
e77c61fe 869 Double_t xcurr, xtemp, xprop = 438.0, step = 10.0, param[6], x0, rho, bz;
c61f0e70 870 Double_t x1[3], x2[3];
871
872 // get initial track position
873 xcurr = tr->GetX();
874
875 // propagate by small steps
876 for (xtemp = xcurr + step; xtemp < xprop; xtemp += step) {
877 // to compute material budget, take current position and
878 // propagated hypothesis without energy loss
879 tr->GetXYZ(x1);
880 bz = tr->GetBz();
881 if (!tr->GetXYZAt(xtemp, bz, x2)) return kFALSE;
c3c15772 882 MeanMaterialBudget(x1, x2, param);
883 rho = param[0]*param[4];
c61f0e70 884 x0 = param[1];
e77c61fe 885 if (!tr->PropagateTo(xtemp, x0, rho)) return kFALSE;
c61f0e70 886 }
887
888 return kTRUE;
889}
890//
891//------------------------------------------------------------------------------
892//
fe17d4cb 893Int_t AliEMCALTracker::CreateMatches()
894{
895 //
896 // Creation of matches between tracks and clusters.
897 // For each ESD track collected by ReadESD(), an AliEMCALTrack is made.
898 // If it finds a cluster close enough to its propagation to EMCAL,
899 // which passes all cuts, its index is stored.
900 // If many clusters are found which satisfy the criteria described above,
901 // only the closest one is stored.
902 // At this level, it is possible that two tracks share the same cluster.
903 //
904
905 // if matches collection is already present, it is deleted
906 if (fMatches) {
907 fMatches->Delete();
908 delete fMatches;
909 }
910 fMatches = new TList;
911
912 // initialize counters and indexes
913 Int_t count = 0;
914 Int_t ic, nClusters = (Int_t)fClusters->GetEntries();
915 Int_t it, nTracks = fTracks->GetEntries();
916
917 // external loop on clusters, internal loop on tracks
918 Double_t dist;
919 for (ic = 0; ic < nClusters; ic++) {
fe17d4cb 920 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
921 for (it = 0; it < nTracks; it++) {
922 AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it);
923 dist = CheckPair(track, cluster);
c61f0e70 924 //cout << dist << endl;
fe17d4cb 925 if (dist <= fMaxDist) {
926 AliEMCALMatch *candidate = new AliEMCALMatch;
927 candidate->SetIndexT(it);
928 candidate->SetIndexC(ic);
929 candidate->SetDistance(dist);
6c23ffed 930 candidate->SetPt(track->GetSignedPt());
fe17d4cb 931 fMatches->Add(candidate);
932 count++;
933 }
934 }
935 }
fe17d4cb 936
937 return count;
938}
939//
940//------------------------------------------------------------------------------
941//
942Int_t AliEMCALTracker::SolveCompetitions()
943{
944 //
945 // Match selector.
946 // The match list is sorted from the best to the worst match, w.r. to the
947 // distance between track prolongation and cluster position.
948 // Based on this criterion, starting from the first (best) match, a flag
949 // is set to both the involved track and cluster, and all matches containing
950 // an already used track or cluster are removed, leaving only the best match
951 // for each cluster.
952 //
953
954 // sort matches with respect to track-cluster distance
955 fMatches->Sort(kSortAscending);
956
957 // keep track of eliminated matches
958 Int_t count = 0;
959
960 // initialize flags to check repetitions
961 Int_t ic, nClusters = (Int_t)fClusters->GetEntries();
962 Int_t it, nTracks = fTracks->GetEntries();
963 Bool_t *usedC = new Bool_t[nClusters];
964 Bool_t *usedT = new Bool_t[nTracks];
965 for (ic = 0; ic < nClusters; ic++) usedC[ic] = kFALSE;
966 for (it = 0; it < nTracks; it++) usedT[it] = kFALSE;
967
968 // loop on matches
969 TListIter iter(fMatches);
970 AliEMCALMatch *match = 0;
971 while ( (match = (AliEMCALMatch*)iter.Next()) ) {
972 ic = match->GetIndexC();
973 it = match->GetIndexT();
974 if (!usedT[it] && !usedC[ic]) {
975 usedT[it] = kTRUE;
976 usedC[ic] = kTRUE;
977 match->CanBeSaved() = kTRUE;
978 }
979 else {
980 count++;
981 }
982 }
983
17773e2e 984 delete [] usedC;
985 delete [] usedT;
986
fe17d4cb 987 return count;
988}
989//
990//------------------------------------------------------------------------------
991//
992void AliEMCALTracker::UnloadClusters()
993{
994 //
044225d9 995 // Free memory from all arrays
996 // This method is called after the local tracking step
997 // so we can safely delete everything
fe17d4cb 998 //
999
044225d9 1000 Clear();
fe17d4cb 1001}
04475328 1002//
1003//------------------------------------------------------------------------------
1004//
1005TVector3 AliEMCALTracker::FindExtrapolationPoint(Double_t x,Double_t y,Double_t z, AliESDtrack *track)
1006{
1007 //Method to determine extrapolation point of track at location x,y,z
1008 AliEMCALTrack *tr = new AliEMCALTrack(*track);
1009 TVector3 error(-100.,-100.,-100.);
1010 if (!tr->PropagateToGlobal(x,y,z, 0.0, 0.0)) {
1011 return error;
1012 }
1013 Double_t pos[3];
1014 tr->GetXYZ(pos);
1015 TVector3 ExTrPos(pos[0],pos[1],pos[2]);
1016 return ExTrPos;
1017}
1018
fe17d4cb 1019//
1020//------------------------------------------------------------------------------
1021//
1022AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint)
1023 : fIndex(index),
0f7fcbef 1024 fLabel(recPoint->GetPrimaryIndex()), //wrong! fixed below
fe17d4cb 1025 fX(0.),
1026 fY(0.),
1027 fZ(0.)
1028{
1029 //
1030 // Translates an AliEMCALRecPoint object into the internal format.
1031 // Index of passed cluster in its native array must be specified.
1032 //
1033 TVector3 clpos;
1034 recPoint->GetGlobalPosition(clpos);
1035
1036 fX = clpos.X();
1037 fY = clpos.Y();
1038 fZ = clpos.Z();
0f7fcbef 1039
1040 //AliEMCALRecPoint stores the track labels in the parents
1041 //list, sorted according to the fractional contribution to the
1042 //RecPoint. The zeroth parent gave the highest contribution
1043 Int_t multparent = 0;
1044 Int_t *parents = recPoint->GetParents(multparent);
1045 if(multparent > 0)
1046 fLabel = parents[0];
1047 else
1048 fLabel = -1;
1049
fe17d4cb 1050}
1051//
1052//------------------------------------------------------------------------------
1053//
1054AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster)
1055 : fIndex(index),
7592dfc4 1056 fLabel(caloCluster->GetLabel()),
fe17d4cb 1057 fX(0.),
1058 fY(0.),
1059 fZ(0.)
1060{
1061 //
1062 // Translates an AliESDCaloCluster object into the internal format.
1063 // Index of passed cluster in its native array must be specified.
1064 //
1065 Float_t clpos[3];
7592dfc4 1066 caloCluster->GetPosition(clpos);
fe17d4cb 1067
1068 fX = (Double_t)clpos[0];
1069 fY = (Double_t)clpos[1];
1070 fZ = (Double_t)clpos[2];
1071}
1072//
1073//------------------------------------------------------------------------------
1074//
1075Int_t AliEMCALTracker::AliEMCALMatch::Compare(const TObject *obj) const
1076{
1077 //
1078 // Tracks compared wrt their distance from matched point
1079 //
1080
1081 AliEMCALTracker::AliEMCALMatch *that = (AliEMCALTracker::AliEMCALMatch*)obj;
1082
c61f0e70 1083 Double_t thisDist = fPt;//fDistance;
1084 Double_t thatDist = that->fPt;//that->GetDistance();
fe17d4cb 1085
1086 if (thisDist > thatDist) return 1;
1087 else if (thisDist < thatDist) return -1;
1088 return 0;
1089}
1090
1091AliEMCALTracker::AliEMCALMatch::AliEMCALMatch()
1092 : TObject(),
1093 fCanBeSaved(kFALSE),
1094 fIndexC(0),
1095 fIndexT(0),
c61f0e70 1096 fDistance(0.),
1097 fPt(0.)
fe17d4cb 1098{
1099 //default constructor
1100
1101}
1102
1103AliEMCALTracker::AliEMCALMatch::AliEMCALMatch(const AliEMCALMatch& copy)
1104 : TObject(),
1105 fCanBeSaved(copy.fCanBeSaved),
1106 fIndexC(copy.fIndexC),
1107 fIndexT(copy.fIndexT),
c61f0e70 1108 fDistance(copy.fDistance),
1109 fPt(copy.fPt)
fe17d4cb 1110{
1111 //copy ctor
1112}