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added low and high flux parameters to the array
[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),
fe17d4cb 75 fRho(1.0),
76 fX0(1.0),
77 fTracks(0),
78 fClusters(0),
c61f0e70 79 fMatches(0),
80 fGeom(0)
fe17d4cb 81{
82 //
83 // Default constructor.
84 // Initializes al simple data members to default values,
85 // and all collections to NULL.
86 // Output file name is set to a default value.
87 //
8ba062b1 88
89 InitParameters();
fe17d4cb 90}
91//
92//------------------------------------------------------------------------------
93//
94AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy)
95 : AliTracker(),
96 fNPropSteps(copy.fNPropSteps),
97 fTrackCorrMode(copy.fTrackCorrMode),
98 fCutX(copy.fCutX),
99 fCutY(copy.fCutY),
100 fCutZ(copy.fCutZ),
101 fCutAlphaMin(copy.fCutAlphaMin),
102 fCutAlphaMax(copy.fCutAlphaMax),
103 fCutAngle(copy.fCutAngle),
104 fMaxDist(copy.fMaxDist),
105 fRho(copy.fRho),
106 fX0(copy.fX0),
107 fTracks((TObjArray*)copy.fTracks->Clone()),
108 fClusters((TObjArray*)copy.fClusters->Clone()),
c61f0e70 109 fMatches((TList*)copy.fMatches->Clone()),
110 fGeom(copy.fGeom)
fe17d4cb 111{
112 //
113 // Copy constructor
114 // Besides copying all parameters, duplicates all collections.
115 //
116}
117//
118//------------------------------------------------------------------------------
119//
120AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& copy)
121{
122 //
123 // Assignment operator.
124 // Besides copying all parameters, duplicates all collections.
125 //
126
127 fCutX = copy.fCutX;
128 fCutY = copy.fCutY;
129 fCutZ = copy.fCutZ;
130 fCutAlphaMin = copy.fCutAlphaMin;
131 fCutAlphaMax = copy.fCutAlphaMax;
132 fCutAngle = copy.fCutAngle;
133 fMaxDist = copy.fMaxDist;
134
135 fTracks = (TObjArray*)copy.fTracks->Clone();
136 fClusters = (TObjArray*)copy.fClusters->Clone();
137 fMatches = (TList*)copy.fMatches->Clone();
138
c61f0e70 139 fGeom = copy.fGeom;
140
fe17d4cb 141 return (*this);
142}
143//
144//------------------------------------------------------------------------------
145//
8ba062b1 146void AliEMCALTracker::InitParameters()
147{
148 //
149 // Retrieve initialization parameters
150 //
151
152 // Check if the instance of AliEMCALRecParam exists,
ba6de5ea 153 const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
154 if(!recParam){
155 AliFatal("Reconstruction parameters for EMCAL not set!");
8ba062b1 156 }
157
ba6de5ea 158 fCutX = recParam->GetTrkCutX();
159 fCutY = recParam->GetTrkCutY();
160 fCutZ = recParam->GetTrkCutZ();
161 fMaxDist = recParam->GetTrkCutR();
162 fCutAngle = recParam->GetTrkCutAngle();
163 fCutAlphaMin = recParam->GetTrkCutAlphaMin();
164 fCutAlphaMax = recParam->GetTrkCutAlphaMax();
8ba062b1 165
166}
167//
168//------------------------------------------------------------------------------
169//
c61f0e70 170TTree* AliEMCALTracker::SearchTrueMatches()
171{
b9560ae2 172 //Search through the list of
173 //track match candidates and clusters
174 //and look for true matches
175 //
176 //
c61f0e70 177 if (!fClusters) return 0;
178 if (fClusters->IsEmpty()) return 0;
179 if (!fTracks) return 0;
180 if (fTracks->IsEmpty()) return 0;
181
182 TTree *outTree = new TTree("tree", "True matches from event");
183 Int_t indexT, indexC, label;
184 outTree->Branch("indexC", &indexC, "indexC/I");
185 outTree->Branch("indexT", &indexT, "indexT/I");
186 outTree->Branch("label", &label , "label/I");
187
188 Double_t dist;
189 Int_t ic, nClusters = (Int_t)fClusters->GetEntries();
190 Int_t it, nTracks = fTracks->GetEntries();
191
192 for (ic = 0; ic < nClusters; ic++) {
193 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
194 label = cluster->Label();
195 indexC = cluster->Index();
196 for (it = 0; it < nTracks; it++) {
197 AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it);
198 if (TMath::Abs(track->GetSeedLabel()) != label) continue;
199 dist = CheckPair(track, cluster);
200 if (dist <= fMaxDist) {
201 indexT = track->GetSeedIndex();
202 outTree->Fill();
203 }
204 }
205 }
206
207 return outTree;
208}
209//
210//------------------------------------------------------------------------------
211//
fe17d4cb 212void AliEMCALTracker::Clear(Option_t* option)
213{
214 //
215 // Clearing method
044225d9 216 // Deletes all objects in arrays and the arrays themselves
fe17d4cb 217 //
218
219 TString opt(option);
220 Bool_t clearTracks = opt.Contains("TRACKS");
221 Bool_t clearClusters = opt.Contains("CLUSTERS");
222 Bool_t clearMatches = opt.Contains("MATCHES");
223 if (opt.Contains("ALL")) {
224 clearTracks = kTRUE;
225 clearClusters = kTRUE;
226 clearMatches = kTRUE;
227 }
228
229 if (fTracks != 0x0 && clearTracks) {
044225d9 230 fTracks->Delete();
231 delete fTracks;
232 fTracks = 0;
fe17d4cb 233 }
234 if (fClusters != 0x0 && clearClusters) {
044225d9 235 fClusters->Delete();
236 delete fClusters;
237 fClusters = 0;
fe17d4cb 238 }
239 if (fMatches != 0x0 && clearMatches) {
044225d9 240 fMatches->Delete();
241 delete fMatches;
242 fMatches = 0;
fe17d4cb 243 }
244}
245//
246//------------------------------------------------------------------------------
247//
248Int_t AliEMCALTracker::LoadClusters(TTree *cTree)
249{
250 //
251 // Load EMCAL clusters in the form of AliEMCALRecPoint,
252 // from simulation temporary files.
253 // (When included in reconstruction chain, this method is used automatically)
254 //
255
256 Clear("CLUSTERS");
257
258 TBranch *branch = cTree->GetBranch("EMCALECARP");
259 if (!branch) {
c61f0e70 260 AliError("Can't get the branch with the EMCAL clusters");
fe17d4cb 261 return 1;
262 }
263
9596d957 264 TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000);
fe17d4cb 265 branch->SetAddress(&clusters);
fe17d4cb 266
267 cTree->GetEvent(0);
9596d957 268 Int_t nClusters = (Int_t)clusters->GetEntries();
fe17d4cb 269 fClusters = new TObjArray(0);
270 for (Int_t i = 0; i < nClusters; i++) {
271 AliEMCALRecPoint *cluster = (AliEMCALRecPoint*)clusters->At(i);
272 if (!cluster) continue;
8ada0ffe 273 if (cluster->GetClusterType() != AliESDCaloCluster::kEMCALClusterv1) continue;
fe17d4cb 274 AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
275 fClusters->AddLast(matchCluster);
276 }
3d9e8b15 277
2ad4424e 278 branch->SetAddress(0);
279 clusters->Delete();
280 delete clusters;
3d9e8b15 281 if (fClusters->IsEmpty())
282 AliWarning("No clusters collected");
2ad4424e 283
044225d9 284 AliInfo(Form("Collected %d clusters (RecPoints)", fClusters->GetEntries()));
fe17d4cb 285
286 return 0;
287}
288//
289//------------------------------------------------------------------------------
290//
af885e0f 291Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd)
fe17d4cb 292{
293 //
294 // Load EMCAL clusters in the form of AliESDCaloClusters,
295 // from an AliESD object.
296 //
297
298 // make sure that tracks/clusters collections are empty
299 Clear("CLUSTERS");
300
301 Int_t start = esd->GetFirstEMCALCluster();
302 Int_t nClustersEMC = esd->GetNumberOfEMCALClusters();
303 Int_t end = start + nClustersEMC;
304
305 fClusters = new TObjArray(0);
306
307 Int_t i;
308 for (i = start; i < end; i++) {
309 AliESDCaloCluster *cluster = esd->GetCaloCluster(i);
310 if (!cluster) continue;
8ada0ffe 311 if (cluster->GetClusterType() != AliESDCaloCluster::kEMCALClusterv1) continue;
fe17d4cb 312 AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
313 fClusters->AddLast(matchCluster);
314 }
3d9e8b15 315 if (fClusters->IsEmpty())
316 AliWarning("No clusters collected");
fe17d4cb 317
044225d9 318 AliInfo(Form("Collected %d clusters from ESD", fClusters->GetEntries()));
fe17d4cb 319
320 return 0;
321}
322//
323//------------------------------------------------------------------------------
324//
af885e0f 325Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd)
fe17d4cb 326{
327 //
328 // Load ESD tracks.
329 //
330
331 Clear("TRACKS");
332
333 Int_t nTracks = esd->GetNumberOfTracks();
334 fTracks = new TObjArray(0);
335
336 Int_t i, j;
337 Bool_t isKink;
338 Double_t alpha;
339 for (i = 0; i < nTracks; i++) {
340 AliESDtrack *esdTrack = esd->GetTrack(i);
341 // set by default the value corresponding to "no match"
c61f0e70 342 esdTrack->SetEMCALcluster(kUnmatched);
fe17d4cb 343// if (esdTrack->GetLabel() < 0) continue;
344// if (!(esdTrack->GetStatus() & AliESDtrack::kTOFout)) continue;
345 isKink = kFALSE;
346 for (j = 0; j < 3; j++) {
c61f0e70 347 if (esdTrack->GetKinkIndex(j) != 0) isKink = kTRUE;
fe17d4cb 348 }
349 if (isKink) continue;
350 AliEMCALTrack *track = new AliEMCALTrack(*esdTrack);
c61f0e70 351 track->SetMass(0.13957018);
fe17d4cb 352 // check alpha and reject the tracks which fall outside EMCAL acceptance
353 alpha = track->GetAlpha() * TMath::RadToDeg();
354 if (alpha > -155.0 && alpha < 67.0) {
355 delete track;
356 continue;
357 }
c61f0e70 358// if (!PropagateToEMCAL(track)) {
359// delete track;
360// continue;
361// }
fe17d4cb 362 track->SetSeedIndex(i);
363 track->SetSeedLabel(esdTrack->GetLabel());
364 fTracks->AddLast(track);
365 }
366 if (fTracks->IsEmpty()) {
3d9e8b15 367 AliWarning("No tracks collected");
fe17d4cb 368 }
369
370 AliInfo(Form("Collected %d tracks", fTracks->GetEntries()));
371
372 return 0;
373}
374//
375//------------------------------------------------------------------------------
376//
af885e0f 377Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd)
fe17d4cb 378{
379 //
380 // Main operation method.
381 // Gets external AliESD containing tracks to be matched.
382 // After executing match finding, stores in the same ESD object all infos
383 // and releases the object for further reconstruction steps.
384 //
3d9e8b15 385 //
386 // Note: should always return 0=OK, because otherwise all tracking
387 // is aborted for this event
388
fe17d4cb 389 if (!esd) {
390 AliError("NULL ESD passed");
391 return 1;
392 }
393
394 // step 1:
395 // if cluster array is empty, cluster are collected
396 // from the passed ESD, and work is done with ESDCaloClusters
c61f0e70 397 Int_t okLoadClusters, nClusters;
fe17d4cb 398 if (!fClusters || (fClusters && fClusters->IsEmpty())) {
fe17d4cb 399 okLoadClusters = LoadClusters(esd);
fe17d4cb 400 }
c61f0e70 401 nClusters = fClusters->GetEntries();
fe17d4cb 402
403 // step 2:
404 // collect ESD tracks
c61f0e70 405 Int_t okLoadTracks = LoadTracks(esd), nTracks;
fe17d4cb 406 if (okLoadTracks) return 3;
c61f0e70 407 nTracks = fTracks->GetEntries();
fe17d4cb 408
409 // step 3:
410 // each track is propagated to the "R" position of each cluster.
411 // The closest cluster is assigned as match.
412 // IF no clusters lie within the maximum allowed distance, no matches are assigned.
413 Int_t nMatches = CreateMatches();
414 if (!nMatches) {
c61f0e70 415 AliInfo(Form("#clusters = %d -- #tracks = %d --> No good matches found.", nClusters, nTracks));
3d9e8b15 416 return 0;
fe17d4cb 417 }
418 else {
c61f0e70 419 AliInfo(Form("#clusters = %d -- #tracks = %d --> Found %d matches.", nClusters, nTracks, nMatches));
fe17d4cb 420 }
421
422 // step 4:
423 // when more than 1 track share the same matched cluster, only the closest one is kept.
424 Int_t nRemoved = SolveCompetitions();
425 AliInfo(Form("Removed %d duplicate matches", nRemoved));
426 if (nRemoved >= nMatches) {
427 AliError("Removed ALL matches! Check the algorithm or data. Nothing to save");
428 return 5;
429 }
430
431 // step 5:
432 // save obtained information setting the 'fEMCALindex' field of AliESDtrack object
c61f0e70 433 Int_t nSaved = 0, trackID, nGood = 0, nFake = 0;
fe17d4cb 434 TListIter iter(fMatches);
435 AliEMCALMatch *match = 0;
436 while ( (match = (AliEMCALMatch*)iter.Next()) ) {
437 if (!match->CanBeSaved()) continue;
438 AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(match->GetIndexT());
439 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(match->GetIndexC());
440 trackID = track->GetSeedIndex();
441 AliESDtrack *esdTrack = esd->GetTrack(trackID);
442 if (!esdTrack) continue;
c61f0e70 443 if (TMath::Abs(esdTrack->GetLabel()) == cluster->Label()) {
fe17d4cb 444 esdTrack->SetEMCALcluster(cluster->Index());
c61f0e70 445 nGood++;
fe17d4cb 446 }
447 else {
448 esdTrack->SetEMCALcluster(-cluster->Index());
c61f0e70 449 nFake++;
fe17d4cb 450 }
451 nSaved++;
452 }
453 /*
454 AliEMCALTrack *track = 0;
455 TObjArrayIter tracks(fTracks);
456 while ( (track = (AliEMCALTrack*)tracks.Next()) ) {
457 trackID = track->GetSeedIndex();
458 clusterID = track->GetMatchedClusterIndex();
459 AliESDtrack *esdTrack = esd->GetTrack(trackID);
460 if (!esdTrack) continue;
461 if (clusterID < 0) {
c61f0e70 462 esdTrack->SetEMCALcluster(kUnmatched);
fe17d4cb 463 }
464 else {
465 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(clusterID);
466 if (!cluster) continue;
467 if (esdTrack->GetLabel() == cluster->Label()) {
468 nGood++;
469 esdTrack->SetEMCALcluster(cluster->Index());
470 }
471 else {
472 esdTrack->SetEMCALcluster(-cluster->Index());
473 }
474 nSaved++;
475 }
476 }
477 */
c61f0e70 478 AliInfo(Form("Saved %d matches [%d good + %d fake]", nSaved, nGood, nFake));
fe17d4cb 479
480 return 0;
481}
482//
483//------------------------------------------------------------------------------
484//
485void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option)
486{
487 //
488 // Set track correction mode
489 // gest the choice in string format and converts into
490 // internal enum
491 //
492
493 TString opt(option);
494 opt.ToUpper();
495
496 if (!opt.CompareTo("NONE")) {
497 fTrackCorrMode = kTrackCorrNone;
498 }
499 else if (!opt.CompareTo("MMB")) {
500 fTrackCorrMode = kTrackCorrMMB;
501 }
502 else if (!opt.CompareTo("FIXED")) {
503 fTrackCorrMode = kTrackCorrFixed;
504 }
505 else {
506 cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl;
507 }
508}
509
510//
511//------------------------------------------------------------------------------
512//
513Double_t AliEMCALTracker::AngleDiff(Double_t angle1, Double_t angle2)
514{
515 //
516 // [PRIVATE]
517 // Given two angles in radiants, it converts them in the range 0-2pi
518 // then computes their true difference, i.e. if the difference a1-a2
519 // results to be larger than 180 degrees, it returns 360 - diff.
520 //
521
522 if (angle1 < 0.0) angle1 += TMath::TwoPi();
523 if (angle1 > TMath::TwoPi()) angle1 -= TMath::TwoPi();
524 if (angle2 < 0.0) angle2 += TMath::TwoPi();
525 if (angle2 > TMath::TwoPi()) angle2 -= TMath::TwoPi();
526
527 Double_t diff = TMath::Abs(angle1 - angle2);
528 if (diff > TMath::Pi()) diff = TMath::TwoPi() - diff;
529
530 if (angle2 > angle1) diff = -diff;
531
532 return diff;
533}
534//
535//------------------------------------------------------------------------------
536//
537Double_t AliEMCALTracker::CheckPair
538(AliEMCALTrack *track, AliEMCALMatchCluster *cl)
539{
540 //
541 // Given a track and a cluster,
542 // propagates the first to the radius of the second.
543 // Then, checks the propagation point against all cuts.
544 // If at least a cut is not passed, a valuer equal to
545 // twice the maximum allowed distance is passed (so the value returned
546 // will not be taken into account when creating matches)
547 //
548
549 // TEMP
550 Bool_t isTrue = kFALSE;
551// if (tr->GetSeedLabel() == cl->Label()) {
552// isTrue = kTRUE;
fe17d4cb 553// }
554
555 // copy track into temporary variable
556 AliEMCALTrack *tr = new AliEMCALTrack(*track);
557
558 Double_t distance = 2.0 * fMaxDist;
559
560 // check against cut on difference 'alpha - phi'
561 Double_t phi = TMath::ATan2(cl->Y(), cl->X());
562 phi = AngleDiff(phi, tr->GetAlpha());
5a14e691 563 if (phi < fCutAlphaMin || phi > fCutAlphaMax){
564 delete tr;
565 return distance;
566 }
fe17d4cb 567
568 // try to propagate to cluster radius
569 // (return the 'distance' value if it fails)
570 Double_t pos[3], &x = pos[0], &y = pos[1], &z = pos[2];
571 Double_t x0, rho;
572 tr->GetXYZ(pos);
573 Double_t rt = TMath::Sqrt(x*x + y*y);
574 Double_t rc = TMath::Sqrt(cl->X()*cl->X() + cl->Y()*cl->Y());
575
576 if (fTrackCorrMode == kTrackCorrMMB) {
577 Double_t pos1[3], pos2[3], param[6];
578 pos1[0] = x;
579 pos1[1] = y;
580 pos1[2] = z;
581 pos2[0] = cl->X();
582 pos2[1] = cl->Y();
583 pos2[2] = cl->Z();
c3c15772 584 MeanMaterialBudget(pos1, pos2, param);
585 rho = param[0]*param[4];
fe17d4cb 586 x0 = param[1];
587 }
588 else if (fTrackCorrMode == kTrackCorrFixed) {
589 rho = fRho;
590 x0 = fX0;
591 }
592 else {
593 rho = 0.0;
594 x0 = 0.0;
595 }
596 if (fNPropSteps) {
597 Int_t i;
598 Double_t r;
599 cout.setf(ios::fixed);
600 cout.precision(5);
601 if (isTrue) cout << "Init : " << rt << ' ' << x << ' ' << y << ' ' << z << endl;
602 for (i = 0; i < fNPropSteps; i++) {
603 r = rt + (rc - rt) * ((Double_t)(i+1)/(Double_t)fNPropSteps);
5a14e691 604 if (!tr->PropagateTo(r, x0, rho)){
605 delete tr;
606 return distance;
607 }
fe17d4cb 608 tr->GetXYZ(pos);
609 if (isTrue) cout << "Step : " << r << ' ' << x << ' ' << y << ' ' << z << endl;
610 }
611 if (isTrue) cout << "Clstr: " << rc << ' ' << cl->X() << ' ' << cl->Y() << ' ' << cl->Z() << endl;
612 }
613 else {
614 // when no steps are used, no correction makes sense
c61f0e70 615 //if (!tr->PropagateTo(rc, 0.0, 0.0)) return distance;
5a14e691 616 if (!tr->PropagateToGlobal(cl->X(), cl->Y(), cl->Z(), 0.0, 0.0)){
617 delete tr;
618 return distance;
619 }
c61f0e70 620 /*
621 Bool_t propOK = kFALSE;
622 cout << "START" << endl;
623 Double_t dist, rCHK, bestDist = 10000000.0;
624 for (Double_t rTMP = rc; rTMP> rc*0.95; rTMP -= 0.1) {
625 if (!tr->PropagateTo(rTMP)) continue;
626 propOK = kTRUE;
627 tr->GetXYZ(pos);
628 rCHK = TMath::Sqrt(x*x + y*y);
629 dist = TMath::Abs(rCHK - rc);
630 cout << rCHK << " vs. " << rc << endl;
631
632 if (TMath::Abs(rCHK - rc) < 0.01) break;
633 }
634 cout << "STOP" << endl;
635 if (!propOK) return distance;
636 */
fe17d4cb 637 }
638
639 // get global propagation of track at end of propagation
640 tr->GetXYZ(pos);
641
642 // check angle cut
643 TVector3 vc(cl->X(), cl->Y(), cl->Z());
644 TVector3 vt(x, y, z);
645 Double_t angle = TMath::Abs(vc.Angle(vt)) * TMath::RadToDeg();
c61f0e70 646 // check: where is the track?
647 Double_t r, phiT, phiC;
648 r = TMath::Sqrt(pos[0]*pos[0] + pos[1]*pos[1]);
649 phiT = TMath::ATan2(pos[1], pos[0]) * TMath::RadToDeg();
650 phiC = vc.Phi() * TMath::RadToDeg();
651 //cout << "Propagated R, phiT, phiC = " << r << ' ' << phiT << ' ' << phiC << endl;
652
fe17d4cb 653 if (angle > fCutAngle) {
654 //cout << "angle" << endl;
5a14e691 655 delete tr;
fe17d4cb 656 return distance;
657 }
658
659 // compute differences wr to each coordinate
660 x -= cl->X();
c61f0e70 661 if (TMath::Abs(x) > fCutX) {
fe17d4cb 662 //cout << "cut X" << endl;
5a14e691 663 delete tr;
fe17d4cb 664 return distance;
665 }
666 y -= cl->Y();
c61f0e70 667 if (TMath::Abs(y) > fCutY) {
fe17d4cb 668 //cout << "cut Y" << endl;
5a14e691 669 delete tr;
fe17d4cb 670 return distance;
671 }
672 z -= cl->Z();
c61f0e70 673 if (TMath::Abs(z) > fCutZ) {
fe17d4cb 674 //cout << "cut Z" << endl;
5a14e691 675 delete tr;
fe17d4cb 676 return distance;
677 }
678
679 // compute true distance
680 distance = TMath::Sqrt(x*x + y*y + z*z);
681 //Double_t temp = CheckPairV2(tr, cl);
682 //if (temp < distance) return temp; else
683
684 // delete temporary object
685 delete tr;
686
687 return distance;
688}
689//
690//------------------------------------------------------------------------------
691//
692Double_t AliEMCALTracker::CheckPairV2
693(AliEMCALTrack *tr, AliEMCALMatchCluster *cl)
694{
695 //
696 // Given a track and a cluster,
697 // propagates the first to the radius of the second.
698 // Then, checks the propagation point against all cuts.
699 // If at least a cut is not passed, a valuer equal to
700 // twice the maximum allowed distance is passed (so the value returned
701 // will not be taken into account when creating matches)
702 //
703
704 // TEMP
705// Bool_t isTrue = kFALSE;
706// if (tr->GetSeedLabel() == cl->Label()) {
707// isTrue = kTRUE;
708// cout << "TRUE MATCH!!!" << endl;
709// }
710
711 Double_t distance = 2.0 * fMaxDist;
712
713 Double_t x0, rho;
714 if (fTrackCorrMode == kTrackCorrMMB) {
715 Double_t pos1[3], pos2[3], param[6];
716 tr->GetXYZ(pos1);
717// pos1[0] = x;
718// pos1[1] = y;
719// pos1[2] = z;
720 pos2[0] = cl->X();
721 pos2[1] = cl->Y();
722 pos2[2] = cl->Z();
c3c15772 723 MeanMaterialBudget(pos1, pos2, param);
724 rho = param[0]*param[4];
fe17d4cb 725 x0 = param[1];
726 }
727 else if (fTrackCorrMode == kTrackCorrFixed) {
728 rho = fRho;
729 x0 = fX0;
730 }
731 else {
732 rho = 0.0;
733 x0 = 0.0;
734 }
735
736 // check against cut on difference 'alpha - phi'
737 Double_t phi = TMath::ATan2(cl->Y(), cl->X());
738 phi = AngleDiff(phi, tr->GetAlpha());
739 if (phi < fCutAlphaMin || phi > fCutAlphaMax) return distance;
740
741 // get cluster position and put them into a vector
742 TVector3 vc(cl->X(), cl->Y(), cl->Z());
743 // rotate the vector in order to put all clusters on a plane intersecting
744 // vertically the X axis; the angle depends on the sector
745 Double_t clusterRot, clusterPhi = vc.Phi() * TMath::RadToDeg();
746 if (clusterPhi < 0.0) clusterPhi += 360.0;
747 if (clusterPhi < 100.0) {
748 clusterRot = -90.0;
749 }
750 else if (clusterPhi < 120.0) {
751 clusterRot = -110.0;
752 }
753 else if (clusterPhi < 140.0) {
754 clusterRot = -130.0;
755 }
756 else if (clusterPhi < 160.0) {
757 clusterRot = -150.0;
758 }
759 else if (clusterPhi < 180.0) {
760 clusterRot = -170.0;
761 }
762 else {
763 clusterRot = -190.0;
764 }
765 vc.RotateZ(clusterRot * TMath::DegToRad());
766 // generate a track from the ESD track selected
767 AliEMCALTrack *track = new AliEMCALTrack(*tr);
768 // compute the 'phi' coordinate of the intersection point to
769 // the EMCAL surface
770 Double_t x = vc.X();
771 Double_t y;
772 track->GetYAt(vc.X(), track->GetBz(), y);
773 Double_t tmp = x*TMath::Cos(track->GetAlpha()) - y*TMath::Sin(track->GetAlpha());
774 y = x*TMath::Sin(track->GetAlpha()) + y*TMath::Cos(track->GetAlpha());
775 x = tmp;
776 Double_t trackPhi = TMath::ATan2(y, x) * TMath::RadToDeg();
777 // compute phi difference
778 Double_t dphi = trackPhi - clusterPhi;
779 if (TMath::Abs(dphi) > 180.0) {
780 dphi = 360.0 - TMath::Abs(dphi);
781 if (clusterPhi > trackPhi) dphi = -dphi;
782 }
783 // propagate track to the X position of rotated cluster
784 // and get the vector of X, Y, Z in the local ref. frame of the track
785 track->PropagateTo(vc.X(), x0, rho);
786 TVector3 vt(track->GetX(), track->GetY(), track->GetZ());
787 vt.RotateZ((clusterPhi - trackPhi) * TMath::DegToRad());
788 TVector3 vdiff = vt-vc;
789
790 // compute differences wr to each coordinate
5a14e691 791 delete track;
fe17d4cb 792 if (vdiff.X() > fCutX) return distance;
793 if (vdiff.Y() > fCutY) return distance;
794 if (vdiff.Z() > fCutZ) return distance;
795
796 // compute true distance
797 distance = vdiff.Mag();
798 return distance;
799}
800//
801//------------------------------------------------------------------------------
802//
c61f0e70 803Double_t AliEMCALTracker::CheckPairV3
804(AliEMCALTrack *track, AliEMCALMatchCluster *cl)
805{
806 //
807 // Given a track and a cluster,
808 // propagates the first to the radius of the second.
809 // Then, checks the propagation point against all cuts.
810 // If at least a cut is not passed, a valuer equal to
811 // twice the maximum allowed distance is passed (so the value returned
812 // will not be taken into account when creating matches)
813 //
814
815 AliEMCALTrack tr(*track);
816
817 Int_t sector;
818 Double_t distance = 2.0 * fMaxDist;
819 Double_t dx, dy, dz;
820 Double_t phi, alpha, slope, tgtXnum, tgtXden, sectorWidth = 20.0 * TMath::DegToRad();
e77c61fe 821 Double_t xcurr, xprop, param[6] = {0., 0., 0., 0., 0., 0.}, x0, rho, bz;
c61f0e70 822 Double_t x[3], x1[3], x2[3];
823
824 // get initial track position
825 xcurr = tr.GetX();
826
827 // evaluate the EMCAL sector number
828 phi = cl->Phi();
829 if (phi < 0.0) phi += TMath::TwoPi();
830 sector = (Int_t)(phi / sectorWidth);
831 alpha = ((Double_t)sector + 0.5) * sectorWidth;
832 // evaluate the corresponding X for track propagation
833 slope = TMath::Tan(alpha - 0.5*TMath::Pi());
834 tgtXnum = cl->Y() - slope * cl->X();
835 tgtXden = TMath::Sqrt(1.0 + slope*slope);
836 xprop = TMath::Abs(tgtXnum / tgtXden);
837
838 // propagate by small steps
839 tr.GetXYZ(x1);
840 bz = tr.GetBz();
841 if (!tr.GetXYZAt(xprop, bz, x2)) return distance;
842 //AliKalmanTrack::MeanMaterialBudget(x1, x2, param);
e77c61fe 843 rho = param[0]*param[4];
c61f0e70 844 x0 = param[1];
e77c61fe 845 if (!tr.PropagateTo(xprop, x0, rho)) return distance;
c61f0e70 846 //if (!tr.PropagateTo(xprop, 0.0, 0.0)) return distance;
847
848 // get propagated position at the end
849 tr.GetXYZ(x);
850 dx = TMath::Abs(x[0] - cl->X());
851 dy = TMath::Abs(x[1] - cl->Y());
852 dz = TMath::Abs(x[2] - cl->Z());
853 if (dx > fCutX || dy > fCutY || dz > fCutZ) return distance;
854
855 distance = TMath::Sqrt(dx*dx + dy*dy + dz*dz);
856
857 return distance;
858}
859//
860//------------------------------------------------------------------------------
861//
862Bool_t AliEMCALTracker::PropagateToEMCAL(AliEMCALTrack *tr)
863{
864 //
865 // Propagates the track to the proximity of the EMCAL surface
866 //
867
e77c61fe 868 Double_t xcurr, xtemp, xprop = 438.0, step = 10.0, param[6], x0, rho, bz;
c61f0e70 869 Double_t x1[3], x2[3];
870
871 // get initial track position
872 xcurr = tr->GetX();
873
874 // propagate by small steps
875 for (xtemp = xcurr + step; xtemp < xprop; xtemp += step) {
876 // to compute material budget, take current position and
877 // propagated hypothesis without energy loss
878 tr->GetXYZ(x1);
879 bz = tr->GetBz();
880 if (!tr->GetXYZAt(xtemp, bz, x2)) return kFALSE;
c3c15772 881 MeanMaterialBudget(x1, x2, param);
882 rho = param[0]*param[4];
c61f0e70 883 x0 = param[1];
e77c61fe 884 if (!tr->PropagateTo(xtemp, x0, rho)) return kFALSE;
c61f0e70 885 }
886
887 return kTRUE;
888}
889//
890//------------------------------------------------------------------------------
891//
fe17d4cb 892Int_t AliEMCALTracker::CreateMatches()
893{
894 //
895 // Creation of matches between tracks and clusters.
896 // For each ESD track collected by ReadESD(), an AliEMCALTrack is made.
897 // If it finds a cluster close enough to its propagation to EMCAL,
898 // which passes all cuts, its index is stored.
899 // If many clusters are found which satisfy the criteria described above,
900 // only the closest one is stored.
901 // At this level, it is possible that two tracks share the same cluster.
902 //
903
904 // if matches collection is already present, it is deleted
905 if (fMatches) {
906 fMatches->Delete();
907 delete fMatches;
908 }
909 fMatches = new TList;
910
911 // initialize counters and indexes
912 Int_t count = 0;
913 Int_t ic, nClusters = (Int_t)fClusters->GetEntries();
914 Int_t it, nTracks = fTracks->GetEntries();
915
916 // external loop on clusters, internal loop on tracks
917 Double_t dist;
918 for (ic = 0; ic < nClusters; ic++) {
fe17d4cb 919 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
920 for (it = 0; it < nTracks; it++) {
921 AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it);
922 dist = CheckPair(track, cluster);
c61f0e70 923 //cout << dist << endl;
fe17d4cb 924 if (dist <= fMaxDist) {
925 AliEMCALMatch *candidate = new AliEMCALMatch;
926 candidate->SetIndexT(it);
927 candidate->SetIndexC(ic);
928 candidate->SetDistance(dist);
6c23ffed 929 candidate->SetPt(track->GetSignedPt());
fe17d4cb 930 fMatches->Add(candidate);
931 count++;
932 }
933 }
934 }
c61f0e70 935
fe17d4cb 936 /*
937 // loop on clusters and tracks
938 Int_t icBest;
939 Double_t dist, distBest;
940 for (it = 0; it < nTracks; it++) {
941 AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it);
942 if (!track) continue;
943 icBest = -1;
944 distBest = fMaxDist;
945 for (ic = 0; ic < nClusters; ic++) {
946 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
947 if (!cluster) continue;
948 dist = CheckPair(track, cluster);
949 if (dist < distBest) {
950 distBest = dist;
951 icBest = ic;
952 }
953 }
954 if (icBest >= 0) {
955 track->SetMatchedClusterIndex(icBest);
956 track->SetMatchedClusterDist(distBest);
957 count++;
958 }
959 else {
960 track->SetMatchedClusterIndex(-1);
961 }
962 }
963 */
964
965 return count;
966}
967//
968//------------------------------------------------------------------------------
969//
970Int_t AliEMCALTracker::SolveCompetitions()
971{
972 //
973 // Match selector.
974 // The match list is sorted from the best to the worst match, w.r. to the
975 // distance between track prolongation and cluster position.
976 // Based on this criterion, starting from the first (best) match, a flag
977 // is set to both the involved track and cluster, and all matches containing
978 // an already used track or cluster are removed, leaving only the best match
979 // for each cluster.
980 //
981
982 // sort matches with respect to track-cluster distance
983 fMatches->Sort(kSortAscending);
984
985 // keep track of eliminated matches
986 Int_t count = 0;
987
988 // initialize flags to check repetitions
989 Int_t ic, nClusters = (Int_t)fClusters->GetEntries();
990 Int_t it, nTracks = fTracks->GetEntries();
991 Bool_t *usedC = new Bool_t[nClusters];
992 Bool_t *usedT = new Bool_t[nTracks];
993 for (ic = 0; ic < nClusters; ic++) usedC[ic] = kFALSE;
994 for (it = 0; it < nTracks; it++) usedT[it] = kFALSE;
995
996 // loop on matches
997 TListIter iter(fMatches);
998 AliEMCALMatch *match = 0;
999 while ( (match = (AliEMCALMatch*)iter.Next()) ) {
1000 ic = match->GetIndexC();
1001 it = match->GetIndexT();
1002 if (!usedT[it] && !usedC[ic]) {
1003 usedT[it] = kTRUE;
1004 usedC[ic] = kTRUE;
1005 match->CanBeSaved() = kTRUE;
1006 }
1007 else {
1008 count++;
1009 }
1010 }
1011
1012 /*
1013 Int_t it1, it2, nTracks = (Int_t)fTracks->GetEntries();
1014 AliEMCALTrack *track1 = 0, *track2 = 0;
1015 for (it1 = 0; it1 < nTracks; it1++) {
1016 track1 = (AliEMCALTrack*)fTracks->At(it1);
1017 if (!track1) continue;
1018 if (track1->GetMatchedClusterIndex() < 0) continue;
1019 for (it2 = it1+1; it2 < nTracks; it2++) {
1020 track2 = (AliEMCALTrack*)fTracks->At(it2);
1021 if (!track2) continue;
1022 if (track2->GetMatchedClusterIndex() < 0) continue;
1023 if (track1->GetMatchedClusterIndex() != track2->GetMatchedClusterIndex()) continue;
1024 count++;
1025 if (track1->GetMatchedClusterDist() < track2->GetMatchedClusterDist()) {
1026 track2->SetMatchedClusterIndex(-1);
1027 }
1028 else if (track2->GetMatchedClusterDist() < track1->GetMatchedClusterDist()) {
1029 track1->SetMatchedClusterIndex(-1);
1030 }
1031 }
1032 }
1033 */
1034
17773e2e 1035 delete [] usedC;
1036 delete [] usedT;
1037
fe17d4cb 1038 return count;
1039}
1040//
1041//------------------------------------------------------------------------------
1042//
1043void AliEMCALTracker::UnloadClusters()
1044{
1045 //
044225d9 1046 // Free memory from all arrays
1047 // This method is called after the local tracking step
1048 // so we can safely delete everything
fe17d4cb 1049 //
1050
044225d9 1051 Clear();
fe17d4cb 1052}
1053//
1054//------------------------------------------------------------------------------
1055//
1056AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint)
1057 : fIndex(index),
1058 fLabel(recPoint->GetPrimaryIndex()),
1059 fX(0.),
1060 fY(0.),
1061 fZ(0.)
1062{
1063 //
1064 // Translates an AliEMCALRecPoint object into the internal format.
1065 // Index of passed cluster in its native array must be specified.
1066 //
1067 TVector3 clpos;
1068 recPoint->GetGlobalPosition(clpos);
1069
1070 fX = clpos.X();
1071 fY = clpos.Y();
1072 fZ = clpos.Z();
1073}
1074//
1075//------------------------------------------------------------------------------
1076//
1077AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster)
1078 : fIndex(index),
7592dfc4 1079 fLabel(caloCluster->GetLabel()),
fe17d4cb 1080 fX(0.),
1081 fY(0.),
1082 fZ(0.)
1083{
1084 //
1085 // Translates an AliESDCaloCluster object into the internal format.
1086 // Index of passed cluster in its native array must be specified.
1087 //
1088 Float_t clpos[3];
7592dfc4 1089 caloCluster->GetPosition(clpos);
fe17d4cb 1090
1091 fX = (Double_t)clpos[0];
1092 fY = (Double_t)clpos[1];
1093 fZ = (Double_t)clpos[2];
1094}
1095//
1096//------------------------------------------------------------------------------
1097//
1098Int_t AliEMCALTracker::AliEMCALMatch::Compare(const TObject *obj) const
1099{
1100 //
1101 // Tracks compared wrt their distance from matched point
1102 //
1103
1104 AliEMCALTracker::AliEMCALMatch *that = (AliEMCALTracker::AliEMCALMatch*)obj;
1105
c61f0e70 1106 Double_t thisDist = fPt;//fDistance;
1107 Double_t thatDist = that->fPt;//that->GetDistance();
fe17d4cb 1108
1109 if (thisDist > thatDist) return 1;
1110 else if (thisDist < thatDist) return -1;
1111 return 0;
1112}
1113
1114AliEMCALTracker::AliEMCALMatch::AliEMCALMatch()
1115 : TObject(),
1116 fCanBeSaved(kFALSE),
1117 fIndexC(0),
1118 fIndexT(0),
c61f0e70 1119 fDistance(0.),
1120 fPt(0.)
fe17d4cb 1121{
1122 //default constructor
1123
1124}
1125
1126AliEMCALTracker::AliEMCALMatch::AliEMCALMatch(const AliEMCALMatch& copy)
1127 : TObject(),
1128 fCanBeSaved(copy.fCanBeSaved),
1129 fIndexC(copy.fIndexC),
1130 fIndexT(copy.fIndexT),
c61f0e70 1131 fDistance(copy.fDistance),
1132 fPt(copy.fPt)
fe17d4cb 1133{
1134 //copy ctor
1135}