Logging of Debug, Info and Error Messages follwing AliRoot Standard http://aliweb...
[u/mrichter/AliRoot.git] / MUON / AliMUONEventReconstructor.cxx
CommitLineData
a9e2aefa 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
88cb7938 16/* $Id$ */
a9e2aefa 17
3831f268 18////////////////////////////////////
a9e2aefa 19//
20// MUON event reconstructor in ALICE
21//
22// This class contains as data:
23// * the parameters for the event reconstruction
24// * a pointer to the array of hits to be reconstructed (the event)
25// * a pointer to the array of segments made with these hits inside each station
26// * a pointer to the array of reconstructed tracks
27//
28// It contains as methods, among others:
29// * MakeEventToBeReconstructed to build the array of hits to be reconstructed
30// * MakeSegments to build the segments
31// * MakeTracks to build the tracks
3831f268 32//
33////////////////////////////////////
a9e2aefa 34
ae17f568 35#include <stdlib.h>
30178c30 36#include <Riostream.h>
37#include <TDirectory.h>
38#include <TFile.h>
39#include <TMatrixD.h> //AZ
a9e2aefa 40
3831f268 41#include "AliMUONEventReconstructor.h"
30178c30 42#include "AliMUON.h"
43#include "AliMUONHit.h"
a9e2aefa 44#include "AliMUONHitForRec.h"
276c44b7 45#include "AliMUONTriggerTrack.h"
276c44b7 46#include "AliMUONTriggerCircuit.h"
a9e2aefa 47#include "AliMUONRawCluster.h"
276c44b7 48#include "AliMUONLocalTrigger.h"
52c9bc11 49#include "AliMUONGlobalTrigger.h"
3831f268 50#include "AliMUONRecoEvent.h"
51#include "AliMUONSegment.h"
a9e2aefa 52#include "AliMUONTrack.h"
a9e2aefa 53#include "AliMUONTrackHit.h"
94de3818 54#include "AliMagF.h"
3831f268 55#include "AliRun.h" // for gAlice
88cb7938 56#include "AliRunLoader.h"
57#include "AliLoader.h"
83dbc640 58#include "AliMUONTrackK.h" //AZ
5d12ce38 59#include "AliMC.h"
d12a7158 60#include "AliLog.h"
a9e2aefa 61
a9e2aefa 62//************* Defaults parameters for reconstruction
343146bf 63const Double_t AliMUONEventReconstructor::fgkDefaultMinBendingMomentum = 3.0;
64const Double_t AliMUONEventReconstructor::fgkDefaultMaxBendingMomentum = 500.0;
65const Double_t AliMUONEventReconstructor::fgkDefaultMaxChi2 = 100.0;
66const Double_t AliMUONEventReconstructor::fgkDefaultMaxSigma2Distance = 16.0;
67const Double_t AliMUONEventReconstructor::fgkDefaultBendingResolution = 0.01;
68const Double_t AliMUONEventReconstructor::fgkDefaultNonBendingResolution = 0.144;
69const Double_t AliMUONEventReconstructor::fgkDefaultChamberThicknessInX0 = 0.03;
a9e2aefa 70// Simple magnetic field:
71// Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG
72// Length and Position from reco_muon.F, with opposite sign:
73// Length = ZMAGEND-ZCOIL
74// Position = (ZMAGEND+ZCOIL)/2
75// to be ajusted differently from real magnetic field ????
343146bf 76const Double_t AliMUONEventReconstructor::fgkDefaultSimpleBValue = 7.0;
77const Double_t AliMUONEventReconstructor::fgkDefaultSimpleBLength = 428.0;
78const Double_t AliMUONEventReconstructor::fgkDefaultSimpleBPosition = 1019.0;
79const Int_t AliMUONEventReconstructor::fgkDefaultRecGeantHits = 0;
80const Double_t AliMUONEventReconstructor::fgkDefaultEfficiency = 0.95;
a9e2aefa 81
343146bf 82const Int_t AliMUONEventReconstructor::fgkDefaultPrintLevel = -1;
a9e2aefa 83
84ClassImp(AliMUONEventReconstructor) // Class implementation in ROOT context
85
86 //__________________________________________________________________________
52c9bc11 87AliMUONEventReconstructor::AliMUONEventReconstructor(AliLoader* loader)
30178c30 88 : TObject()
a9e2aefa 89{
90 // Constructor for class AliMUONEventReconstructor
91 SetReconstructionParametersToDefaults();
83dbc640 92 fTrackMethod = 1; //AZ - tracking method (1-default, 2-Kalman)
a9e2aefa 93 // Memory allocation for the TClonesArray of hits for reconstruction
94 // Is 10000 the right size ????
95 fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000);
96 fNHitsForRec = 0; // really needed or GetEntriesFast sufficient ????
97 // Memory allocation for the TClonesArray's of segments in stations
98 // Is 2000 the right size ????
30178c30 99 for (Int_t st = 0; st < fgkMaxMuonTrackingStations; st++) {
a9e2aefa 100 fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000);
101 fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ????
102 }
103 // Memory allocation for the TClonesArray of reconstructed tracks
104 // Is 10 the right size ????
105 fRecTracksPtr = new TClonesArray("AliMUONTrack", 10);
106 fNRecTracks = 0; // really needed or GetEntriesFast sufficient ????
276c44b7 107// trigger tracks
108 fRecTriggerTracksPtr = new TClonesArray("AliMUONTriggerTrack", 10);
109 fNRecTriggerTracks = 0; // really needed or GetEntriesFast sufficient ????
8429a5e4 110 // Memory allocation for the TClonesArray of hits on reconstructed tracks
111 // Is 100 the right size ????
112 fRecTrackHitsPtr = new TClonesArray("AliMUONTrack", 100);
113 fNRecTrackHits = 0; // really needed or GetEntriesFast sufficient ????
a9e2aefa 114
5b64e914 115 // Sign of fSimpleBValue according to sign of Bx value at (50,50,-950).
a6f03ddb 116 Float_t b[3], x[3];
5b64e914 117 x[0] = 50.; x[1] = 50.; x[2] = -950.;
a6f03ddb 118 gAlice->Field()->Field(x, b);
065bd0e1 119 fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]);
5b64e914 120 fSimpleBPosition = TMath::Sign(fSimpleBPosition,(Double_t) x[2]);
a6f03ddb 121 // See how to get fSimple(BValue, BLength, BPosition)
122 // automatically calculated from the actual magnetic field ????
a9e2aefa 123
124 if (fPrintLevel >= 0) {
a6f03ddb 125 cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump();
126 cout << endl << "Magnetic field from root file:" << endl;
127 gAlice->Field()->Dump();
128 cout << endl;
129 }
c7ba256d 130
47a6b602 131 // Initializions for GEANT background events
132 fBkgGeantFile = 0;
133 fBkgGeantTK = 0;
134 fBkgGeantParticles = 0;
135 fBkgGeantTH = 0;
136 fBkgGeantHits = 0;
137 fBkgGeantEventNumber = -1;
138
c7ba256d 139 // Initialize to 0 pointers to RecoEvent, tree and tree file
140 fRecoEvent = 0;
141 fEventTree = 0;
142 fTreeFile = 0;
52c9bc11 143
144 // initialize loader's
145 fLoader = loader;
146
147 // initialize container
148 fMUONData = new AliMUONData(fLoader,"MUON","MUON");
149
150 // Loading AliRun master
151 AliRunLoader* runloader = fLoader->GetRunLoader();
152 if (runloader->GetAliRun() == 0x0) runloader->LoadgAlice();
153 gAlice = runloader->GetAliRun();
154
a9e2aefa 155 return;
156}
52c9bc11 157 //__________________________________________________________________________
30178c30 158AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& rhs)
159 : TObject(rhs)
9cbdf048 160{
30178c30 161// Protected copy constructor
162
d12a7158 163 AliFatal("Not implemented.");
9cbdf048 164}
165
30178c30 166AliMUONEventReconstructor &
167AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& rhs)
9cbdf048 168{
30178c30 169// Protected assignement operator
170
171 if (this == &rhs) return *this;
172
d12a7158 173 AliFatal("Not implemented.");
30178c30 174
175 return *this;
9cbdf048 176}
177
a9e2aefa 178 //__________________________________________________________________________
179AliMUONEventReconstructor::~AliMUONEventReconstructor(void)
180{
181 // Destructor for class AliMUONEventReconstructor
c7ba256d 182 if (fTreeFile) {
183 fTreeFile->Close();
184 delete fTreeFile;
185 }
186// if (fEventTree) delete fEventTree;
187 if (fRecoEvent) delete fRecoEvent;
a9e2aefa 188 delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ????
30178c30 189 for (Int_t st = 0; st < fgkMaxMuonTrackingStations; st++)
a9e2aefa 190 delete fSegmentsPtr[st]; // Correct destruction of everything ????
191 return;
192}
193
194 //__________________________________________________________________________
195void AliMUONEventReconstructor::SetReconstructionParametersToDefaults(void)
196{
197 // Set reconstruction parameters to default values
198 // Would be much more convenient with a structure (or class) ????
343146bf 199 fMinBendingMomentum = fgkDefaultMinBendingMomentum;
200 fMaxBendingMomentum = fgkDefaultMaxBendingMomentum;
201 fMaxChi2 = fgkDefaultMaxChi2;
202 fMaxSigma2Distance = fgkDefaultMaxSigma2Distance;
a9e2aefa 203
9cbdf048 204 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON");
a9e2aefa 205 // ******** Parameters for making HitsForRec
206 // minimum radius,
207 // like in TRACKF_STAT:
208 // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3;
209 // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9
343146bf 210 for (Int_t ch = 0; ch < fgkMaxMuonTrackingChambers; ch++) {
9cbdf048 211 if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
a9e2aefa 212 2.0 * TMath::Pi() / 180.0;
213 else fRMin[ch] = 30.0;
d0bfce8d 214 // maximum radius at 10 degrees and Z of chamber
215 fRMax[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
216 10.0 * TMath::Pi() / 180.0;
a9e2aefa 217 }
a9e2aefa 218
219 // ******** Parameters for making segments
220 // should be parametrized ????
221 // according to interval between chambers in a station ????
222 // Maximum distance in non bending plane
223 // 5 * 0.22 just to remember the way it was made in TRACKF_STAT
224 // SIGCUT*DYMAX(IZ)
30178c30 225 for (Int_t st = 0; st < fgkMaxMuonTrackingStations; st++)
a9e2aefa 226 fSegmentMaxDistNonBending[st] = 5. * 0.22;
860cef81 227 // Maximum distance in bending plane:
228 // values from TRACKF_STAT, corresponding to (J psi 20cm),
229 // scaled to the real distance between chambers in a station
ef21c79e 230 fSegmentMaxDistBending[0] = TMath::Abs( 1.5 *
231 ((&(pMUON->Chamber(1)))->Z() - (&(pMUON->Chamber(0)))->Z()) / 20.0);
d12a7158 232 fSegmentMaxDistBending[1] = TMath::Abs( 1.5 *
ef21c79e 233 ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0);
d12a7158 234 fSegmentMaxDistBending[2] = TMath::Abs( 3.0 *
ef21c79e 235 ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0);
d12a7158 236 fSegmentMaxDistBending[3] = TMath::Abs( 6.0 *
ef21c79e 237 ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0);
d12a7158 238 fSegmentMaxDistBending[4] = TMath::Abs( 6.0 *
ef21c79e 239 ((&(pMUON->Chamber(9)))->Z() - (&(pMUON->Chamber(8)))->Z()) / 20.0);
a9e2aefa 240
343146bf 241 fBendingResolution = fgkDefaultBendingResolution;
242 fNonBendingResolution = fgkDefaultNonBendingResolution;
243 fChamberThicknessInX0 = fgkDefaultChamberThicknessInX0;
244 fSimpleBValue = fgkDefaultSimpleBValue;
245 fSimpleBLength = fgkDefaultSimpleBLength;
246 fSimpleBPosition = fgkDefaultSimpleBPosition;
247 fRecGeantHits = fgkDefaultRecGeantHits;
248 fEfficiency = fgkDefaultEfficiency;
249 fPrintLevel = fgkDefaultPrintLevel;
a9e2aefa 250 return;
251}
252
253//__________________________________________________________________________
3831f268 254Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const
a9e2aefa 255{
256 // Returns impact parameter at vertex in bending plane (cm),
257 // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c),
258 // using simple values for dipole magnetic field.
065bd0e1 259 // The sign of "BendingMomentum" is the sign of the charge.
a9e2aefa 260 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
261 BendingMomentum);
262}
263
264//__________________________________________________________________________
3831f268 265Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const
a9e2aefa 266{
267 // Returns signed bending momentum in bending plane (GeV/c),
065bd0e1 268 // the sign being the sign of the charge for particles moving forward in Z,
a9e2aefa 269 // from the impact parameter "ImpactParam" at vertex in bending plane (cm),
270 // using simple values for dipole magnetic field.
a9e2aefa 271 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
272 ImpactParam);
273}
274
275//__________________________________________________________________________
276void AliMUONEventReconstructor::SetBkgGeantFile(Text_t *BkgGeantFileName)
277{
278 // Set background file ... for GEANT hits
279 // Must be called after having loaded the firts signal event
280 if (fPrintLevel >= 0) {
281 cout << "Enter SetBkgGeantFile with BkgGeantFileName ``"
282 << BkgGeantFileName << "''" << endl;}
283 if (strlen(BkgGeantFileName)) {
284 // BkgGeantFileName not empty: try to open the file
285 if (fPrintLevel >= 2) {cout << "Before File(Bkg)" << endl; gDirectory->Dump();}
286 fBkgGeantFile = new TFile(BkgGeantFileName);
287 if (fPrintLevel >= 2) {cout << "After File(Bkg)" << endl; gDirectory->Dump();}
288 if (fBkgGeantFile-> IsOpen()) {
289 if (fPrintLevel >= 0) {
290 cout << "Background for GEANT hits in file: ``" << BkgGeantFileName
291 << "'' successfully opened" << endl;}
292 }
293 else {
294 cout << "Background for GEANT hits in file: " << BkgGeantFileName << endl;
295 cout << "NOT FOUND: EXIT" << endl;
296 exit(0); // right instruction for exit ????
297 }
298 // Arrays for "particles" and "hits"
299 fBkgGeantParticles = new TClonesArray("TParticle", 200);
300 fBkgGeantHits = new TClonesArray("AliMUONHit", 2000);
301 // Event number to -1 for initialization
302 fBkgGeantEventNumber = -1;
303 // Back to the signal file:
304 // first signal event must have been loaded previously,
305 // otherwise, Segmentation violation at the next instruction
306 // How is it possible to do smething better ????
307 ((gAlice->TreeK())->GetCurrentFile())->cd();
308 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
309 }
310 return;
311}
312
313//__________________________________________________________________________
314void AliMUONEventReconstructor::NextBkgGeantEvent(void)
315{
316 // Get next event in background file for GEANT hits
317 // Goes back to event number 0 when end of file is reached
318 char treeName[20];
319 TBranch *branch;
320 if (fPrintLevel >= 0) {
321 cout << "Enter NextBkgGeantEvent" << endl;}
322 // Clean previous event
323 if(fBkgGeantTK) delete fBkgGeantTK;
324 fBkgGeantTK = NULL;
325 if(fBkgGeantParticles) fBkgGeantParticles->Clear();
326 if(fBkgGeantTH) delete fBkgGeantTH;
327 fBkgGeantTH = NULL;
328 if(fBkgGeantHits) fBkgGeantHits->Clear();
329 // Increment event number
330 fBkgGeantEventNumber++;
331 // Get access to Particles and Hits for event from background file
332 if (fPrintLevel >= 2) {cout << "Before cd(Bkg)" << endl; gDirectory->Dump();}
333 fBkgGeantFile->cd();
334 if (fPrintLevel >= 2) {cout << "After cd(Bkg)" << endl; gDirectory->Dump();}
335 // Particles: TreeK for event and branch "Particles"
336 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
337 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
338 if (!fBkgGeantTK) {
339 if (fPrintLevel >= 0) {
340 cout << "Cannot find Kine Tree for background event: " <<
341 fBkgGeantEventNumber << endl;
342 cout << "Goes back to event 0" << endl;
343 }
344 fBkgGeantEventNumber = 0;
345 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
346 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
347 if (!fBkgGeantTK) {
d12a7158 348 AliError(Form("cannot find Kine Tree for background event: %d",fBkgGeantEventNumber));
349 exit(0);
a9e2aefa 350 }
351 }
352 if (fBkgGeantTK)
353 fBkgGeantTK->SetBranchAddress("Particles", &fBkgGeantParticles);
354 fBkgGeantTK->GetEvent(0); // why event 0 ???? necessary ????
355 // Hits: TreeH for event and branch "MUON"
356 sprintf(treeName, "TreeH%d", fBkgGeantEventNumber);
357 fBkgGeantTH = (TTree*)gDirectory->Get(treeName);
358 if (!fBkgGeantTH) {
d12a7158 359 AliError(Form("cannot find Hits Tree for background event: %d",fBkgGeantEventNumber));
a9e2aefa 360 exit(0);
361 }
362 if (fBkgGeantTH && fBkgGeantHits) {
363 branch = fBkgGeantTH->GetBranch("MUON");
364 if (branch) branch->SetAddress(&fBkgGeantHits);
365 }
366 fBkgGeantTH->GetEntries(); // necessary ????
367 // Back to the signal file
368 ((gAlice->TreeK())->GetCurrentFile())->cd();
369 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
370 return;
371}
372
373//__________________________________________________________________________
374void AliMUONEventReconstructor::EventReconstruct(void)
375{
376 // To reconstruct one event
377 if (fPrintLevel >= 1) cout << "enter EventReconstruct" << endl;
378 MakeEventToBeReconstructed();
379 MakeSegments();
380 MakeTracks();
d837040f 381 if (fMUONData->IsTriggerTrackBranchesInTree())
382 ValidateTracksWithTrigger();
383
384 // Add tracks to MUON data container
385 for(Int_t i=0; i<GetNRecTracks(); i++) {
386 AliMUONTrack * track = (AliMUONTrack*) GetRecTracksPtr()->At(i);
387 fMUONData->AddRecTrack(*track);
388 }
389
a9e2aefa 390 return;
391}
392
276c44b7 393//__________________________________________________________________________
394void AliMUONEventReconstructor::EventReconstructTrigger(void)
395{
396 // To reconstruct one event
397 if (fPrintLevel >= 1) cout << "enter EventReconstructTrigger" << endl;
398 MakeTriggerTracks();
399 return;
400}
401
a9e2aefa 402 //__________________________________________________________________________
403void AliMUONEventReconstructor::ResetHitsForRec(void)
404{
405 // To reset the array and the number of HitsForRec,
406 // and also the number of HitsForRec
407 // and the index of the first HitForRec per chamber
408 if (fHitsForRecPtr) fHitsForRecPtr->Clear();
409 fNHitsForRec = 0;
343146bf 410 for (Int_t ch = 0; ch < fgkMaxMuonTrackingChambers; ch++)
a9e2aefa 411 fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0;
412 return;
413}
414
415 //__________________________________________________________________________
416void AliMUONEventReconstructor::ResetSegments(void)
417{
418 // To reset the TClonesArray of segments and the number of Segments
419 // for all stations
30178c30 420 for (Int_t st = 0; st < fgkMaxMuonTrackingStations; st++) {
a9e2aefa 421 if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear();
422 fNSegments[st] = 0;
423 }
424 return;
425}
426
427 //__________________________________________________________________________
428void AliMUONEventReconstructor::ResetTracks(void)
429{
430 // To reset the TClonesArray of reconstructed tracks
8429a5e4 431 if (fRecTracksPtr) fRecTracksPtr->Delete();
432 // Delete in order that the Track destructors are called,
433 // hence the space for the TClonesArray of pointers to TrackHit's is freed
a9e2aefa 434 fNRecTracks = 0;
435 return;
436}
437
276c44b7 438 //__________________________________________________________________________
439void AliMUONEventReconstructor::ResetTriggerTracks(void)
440{
441 // To reset the TClonesArray of reconstructed trigger tracks
442 if (fRecTriggerTracksPtr) fRecTriggerTracksPtr->Delete();
443 // Delete in order that the Track destructors are called,
444 // hence the space for the TClonesArray of pointers to TrackHit's is freed
445 fNRecTriggerTracks = 0;
446 return;
447}
448
8429a5e4 449 //__________________________________________________________________________
450void AliMUONEventReconstructor::ResetTrackHits(void)
451{
452 // To reset the TClonesArray of hits on reconstructed tracks
453 if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear();
454 fNRecTrackHits = 0;
455 return;
456}
457
a9e2aefa 458 //__________________________________________________________________________
459void AliMUONEventReconstructor::MakeEventToBeReconstructed(void)
460{
461 // To make the list of hits to be reconstructed,
462 // either from the GEANT hits or from the raw clusters
463 // according to the parameter set for the reconstructor
e191bb57 464// TString evfoldname = AliConfig::GetDefaultEventFolderName();//to be interfaced properly
88cb7938 465
52c9bc11 466// AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname);
467// if (rl == 0x0)
468// {
469// Error("MakeEventToBeReconstructed",
470// "Can not find Run Loader in Event Folder named %s.",
471// evfoldname.Data());
472// return;
473// }
474// AliLoader* gime = rl->GetLoader("MUONLoader");
475// if (gime == 0x0)
476// {
477// Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader.");
478// return;
479// }
88cb7938 480
a9e2aefa 481 if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl;
482 ResetHitsForRec();
483 if (fRecGeantHits == 1) {
484 // Reconstruction from GEANT hits
485 // Back to the signal file
52c9bc11 486 TTree* treeH = fLoader->TreeH();
88cb7938 487 if (treeH == 0x0)
488 {
52c9bc11 489 Int_t retval = fLoader->LoadHits();
88cb7938 490 if ( retval)
491 {
d12a7158 492 AliError("Error occured while loading hits.");
88cb7938 493 return;
494 }
52c9bc11 495 treeH = fLoader->TreeH();
88cb7938 496 if (treeH == 0x0)
497 {
d12a7158 498 AliError("Can not get TreeH");
88cb7938 499 return;
500 }
501 }
52c9bc11 502 fMUONData->SetTreeAddress("H");
503 AddHitsForRecFromGEANT(treeH);
88cb7938 504
a9e2aefa 505 // Background hits
506 AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits);
507 // Sort HitsForRec in increasing order with respect to chamber number
508 SortHitsForRecWithIncreasingChamber();
509 }
510 else {
511 // Reconstruction from raw clusters
512 // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
513 // Security on MUON ????
514 // TreeR assumed to be be "prepared" in calling function
515 // by "MUON->GetTreeR(nev)" ????
52c9bc11 516 TTree *treeR = fLoader->TreeR();
517 fMUONData->SetTreeAddress("RC");
9cbdf048 518 AddHitsForRecFromRawClusters(treeR);
a9e2aefa 519 // No sorting: it is done automatically in the previous function
520 }
521 if (fPrintLevel >= 10) {
522 cout << "end of MakeEventToBeReconstructed" << endl;
523 cout << "NHitsForRec: " << fNHitsForRec << endl;
343146bf 524 for (Int_t ch = 0; ch < fgkMaxMuonTrackingChambers; ch++) {
a9e2aefa 525 cout << "chamber(0...): " << ch
526 << " NHitsForRec: " << fNHitsForRecPerChamber[ch]
527 << " index(first HitForRec): " << fIndexOfFirstHitForRecPerChamber[ch]
528 << endl;
529 for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch];
530 hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch];
531 hit++) {
532 cout << "HitForRec index(0...): " << hit << endl;
533 ((*fHitsForRecPtr)[hit])->Dump();
534 }
535 }
536 }
537 return;
538}
539
540 //__________________________________________________________________________
541void AliMUONEventReconstructor::AddHitsForRecFromGEANT(TTree *TH)
542{
543 // To add to the list of hits for reconstruction
544 // the GEANT signal hits from a hit tree TH.
83dbc640 545 Int_t hitBits, chamBits; //AZ
a9e2aefa 546 if (fPrintLevel >= 2)
547 cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl;
548 if (TH == NULL) return;
52c9bc11 549 // AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
550 //AliMUONData * muondata = pMUON->GetMUONData();
a9e2aefa 551 // Security on MUON ????
552 // See whether it could be the same for signal and background ????
553 // Loop over tracks in tree
554 Int_t ntracks = (Int_t) TH->GetEntries();
555 if (fPrintLevel >= 2)
556 cout << "ntracks: " << ntracks << endl;
83dbc640 557 fMuons = 0; //AZ
a9e2aefa 558 for (Int_t track = 0; track < ntracks; track++) {
52c9bc11 559 fMUONData->ResetHits();
a9e2aefa 560 TH->GetEvent(track);
561 // Loop over hits
562 Int_t hit = 0;
83dbc640 563 hitBits = 0; // AZ
564 chamBits = 0; // AZ
565 Int_t itrack = track; //AZ
38302c61 566
567 Int_t ihit, nhits=0;
52c9bc11 568 nhits = (Int_t) fMUONData->Hits()->GetEntriesFast();
38302c61 569 AliMUONHit* mHit=0x0;
1391e633 570
38302c61 571 for(ihit=0; ihit<nhits; ihit++) {
52c9bc11 572 mHit = static_cast<AliMUONHit*>(fMUONData->Hits()->At(ihit));
38302c61 573 Int_t ipart = TMath::Abs ((Int_t) mHit->Particle()); //AZ
574 if (NewHitForRecFromGEANT(mHit,track, hit, 1) && ipart == 13
575 //if (NewHitForRecFromGEANT(mHit,itrack-1, hit, 1) && ipart == 13
1391e633 576 && itrack <= 2 && !BIT(mHit->Chamber()-1) ) chamBits |= BIT(mHit->Chamber()-1); //AZ - set bit
38302c61 577 }
1391e633 578
83dbc640 579 if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 &&
580 chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3))
581 fMuons += 1; //AZ
582 //if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 &&
583 // chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3) &&
584 // ((chamBits&3)==3 || (chamBits>>2&3)==3)) fMuons += 1;
a9e2aefa 585 } // end of track loop
586 return;
587}
588
589 //__________________________________________________________________________
590void AliMUONEventReconstructor::AddHitsForRecFromBkgGEANT(TTree *TH, TClonesArray *Hits)
591{
592 // To add to the list of hits for reconstruction
593 // the GEANT background hits from a hit tree TH and a pointer Hits to a hit list.
594 // How to have only one function "AddHitsForRecFromGEANT" ????
595 if (fPrintLevel >= 2)
596 cout << "enter AddHitsForRecFromBkgGEANT with TH: " << TH << endl;
597 if (TH == NULL) return;
598 // Loop over tracks in tree
599 Int_t ntracks = (Int_t) TH->GetEntries();
600 if (fPrintLevel >= 2)
601 cout << "ntracks: " << ntracks << endl;
602 for (Int_t track = 0; track < ntracks; track++) {
603 if (Hits) Hits->Clear();
604 TH->GetEvent(track);
605 // Loop over hits
606 for (Int_t hit = 0; hit < Hits->GetEntriesFast(); hit++) {
607 NewHitForRecFromGEANT((AliMUONHit*) (*Hits)[hit], track, hit, 0);
608 } // end of hit loop
609 } // end of track loop
610 return;
611}
612
613 //__________________________________________________________________________
614AliMUONHitForRec* AliMUONEventReconstructor::NewHitForRecFromGEANT(AliMUONHit* Hit, Int_t TrackNumber, Int_t HitNumber, Int_t Signal)
615{
616 // To make a new hit for reconstruction from a GEANT hit pointed to by "Hit",
617 // with hit number "HitNumber" in the track numbered "TrackNumber",
618 // either from signal ("Signal" = 1) or background ("Signal" = 0) event.
619 // Selects hits in tracking (not trigger) chambers.
620 // Takes into account the efficiency (fEfficiency)
621 // and the smearing from resolution (fBendingResolution and fNonBendingResolution).
622 // Adds a condition on the radius between RMin and RMax
623 // to better simulate the real chambers.
624 // Returns the pointer to the new hit for reconstruction,
625 // or NULL in case of inefficiency or non tracking chamber or bad radius.
626 // No condition on at most 20 cm from a muon from a resonance
627 // like in Fortran TRACKF_STAT.
628 AliMUONHitForRec* hitForRec;
629 Double_t bendCoor, nonBendCoor, radius;
0a5f36d9 630 Int_t chamber = Hit->Chamber() - 1; // chamber(0...)
a9e2aefa 631 // only in tracking chambers (fChamber starts at 1)
343146bf 632 if (chamber >= fgkMaxMuonTrackingChambers) return NULL;
a9e2aefa 633 // only if hit is efficient (keep track for checking ????)
634 if (gRandom->Rndm() > fEfficiency) return NULL;
635 // only if radius between RMin and RMax
94de3818 636 bendCoor = Hit->Y();
637 nonBendCoor = Hit->X();
a9e2aefa 638 radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor));
d0bfce8d 639 // This cut is not needed with a realistic chamber geometry !!!!
640// if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL;
a9e2aefa 641 // new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's
642 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit);
643 fNHitsForRec++;
644 // add smearing from resolution
645 hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution));
646 hitForRec->SetNonBendingCoor(nonBendCoor
647 + gRandom->Gaus(0., fNonBendingResolution));
d0bfce8d 648// // !!!! without smearing
649// hitForRec->SetBendingCoor(bendCoor);
650// hitForRec->SetNonBendingCoor(nonBendCoor);
a9e2aefa 651 // more information into HitForRec
652 // resolution: angular effect to be added here ????
653 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
654 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
655 // GEANT track info
656 hitForRec->SetHitNumber(HitNumber);
657 hitForRec->SetTHTrack(TrackNumber);
658 hitForRec->SetGeantSignal(Signal);
659 if (fPrintLevel >= 10) {
660 cout << "track: " << TrackNumber << " hit: " << HitNumber << endl;
661 Hit->Dump();
662 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
663 hitForRec->Dump();}
664 return hitForRec;
665}
666
667 //__________________________________________________________________________
668void AliMUONEventReconstructor::SortHitsForRecWithIncreasingChamber()
669{
670 // Sort HitsForRec's in increasing order with respect to chamber number.
671 // Uses the function "Compare".
672 // Update the information for HitsForRec per chamber too.
673 Int_t ch, nhits, prevch;
674 fHitsForRecPtr->Sort();
343146bf 675 for (ch = 0; ch < fgkMaxMuonTrackingChambers; ch++) {
a9e2aefa 676 fNHitsForRecPerChamber[ch] = 0;
677 fIndexOfFirstHitForRecPerChamber[ch] = 0;
678 }
679 prevch = 0; // previous chamber
680 nhits = 0; // number of hits in current chamber
681 // Loop over HitsForRec
682 for (Int_t hit = 0; hit < fNHitsForRec; hit++) {
683 // chamber number (0...)
684 ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber();
685 // increment number of hits in current chamber
686 (fNHitsForRecPerChamber[ch])++;
687 // update index of first HitForRec in current chamber
688 // if chamber number different from previous one
689 if (ch != prevch) {
690 fIndexOfFirstHitForRecPerChamber[ch] = hit;
691 prevch = ch;
692 }
693 }
694 return;
695}
696
697// //__________________________________________________________________________
698// void AliMUONEventReconstructor::AddHitsForRecFromCathodeCorrelations(TTree* TC)
699// {
700// // OLD VERSION WHEN ONE ONE WAS USING SO CALLED CATHODE CORRELATIONS
701// // To add to the list of hits for reconstruction
702// // the (cathode correlated) raw clusters
703// // No condition added, like in Fortran TRACKF_STAT,
704// // on the radius between RMin and RMax.
705// AliMUONHitForRec *hitForRec;
706// if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromCathodeCorrelations" << endl;
707// AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
708// // Security on MUON ????
709// // Loop over tracking chambers
343146bf 710// for (Int_t ch = 0; ch < fgkMaxMuonTrackingChambers; ch++) {
a9e2aefa 711// // number of HitsForRec to 0 for the chamber
712// fNHitsForRecPerChamber[ch] = 0;
713// // index of first HitForRec for the chamber
714// if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
715// else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
716// TClonesArray *reconst_hits = MUON->ReconstHitsAddress(ch);
717// MUON->ResetReconstHits();
718// TC->GetEvent();
719// Int_t ncor = (Int_t)reconst_hits->GetEntries();
720// // Loop over (cathode correlated) raw clusters
721// for (Int_t cor = 0; cor < ncor; cor++) {
722// AliMUONReconstHit * mCor =
723// (AliMUONReconstHit*) reconst_hits->UncheckedAt(cor);
724// // new AliMUONHitForRec from (cathode correlated) raw cluster
725// // and increment number of AliMUONHitForRec's (total and in chamber)
726// hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(mCor);
727// fNHitsForRec++;
728// (fNHitsForRecPerChamber[ch])++;
729// // more information into HitForRec
730// hitForRec->SetChamberNumber(ch);
731// hitForRec->SetHitNumber(cor);
732// // Z coordinate of the chamber (cm) with sign opposite to GEANT sign
733// // could (should) be more exact from chamber geometry ????
734// hitForRec->SetZ(-(&(MUON->Chamber(ch)))->Z());
735// if (fPrintLevel >= 10) {
736// cout << "chamber (0...): " << ch <<
737// " cathcorrel (0...): " << cor << endl;
738// mCor->Dump();
739// cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
740// hitForRec->Dump();}
741// } // end of cluster loop
742// } // end of chamber loop
743// return;
744// }
745
746 //__________________________________________________________________________
747void AliMUONEventReconstructor::AddHitsForRecFromRawClusters(TTree* TR)
748{
749 // To add to the list of hits for reconstruction all the raw clusters
750 // No condition added, like in Fortran TRACKF_STAT,
751 // on the radius between RMin and RMax.
752 AliMUONHitForRec *hitForRec;
753 AliMUONRawCluster *clus;
f69d51b5 754 Int_t iclus, nclus, nTRentries;
a9e2aefa 755 TClonesArray *rawclusters;
756 if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl;
88cb7938 757
e191bb57 758// TString evfoldname = AliConfig::GetDefaultEventFolderName();//to be interfaced properly
52c9bc11 759// AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname);
760// if (rl == 0x0)
761// {
762// Error("MakeEventToBeReconstructed",
763// "Can not find Run Loader in Event Folder named %s.",
764// evfoldname.Data());
765// return;
766// }
767// AliLoader* gime = rl->GetLoader("MUONLoader");
768// if (gime == 0x0)
769// {
770// Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader.");
771// return;
772// }
773// // Loading AliRun master
774// rl->LoadgAlice();
775// gAlice = rl->GetAliRun();
88cb7938 776
777 // Loading MUON subsystem
52c9bc11 778 // AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON");
88cb7938 779
f69d51b5 780 nTRentries = Int_t(TR->GetEntries());
781 if (nTRentries != 1) {
d12a7158 782 AliError(Form("nTRentries = %d not equal to 1 ",nTRentries));
f69d51b5 783 exit(0);
784 }
52c9bc11 785 fLoader->TreeR()->GetEvent(0); // only one entry
786
a9e2aefa 787 // Loop over tracking chambers
343146bf 788 for (Int_t ch = 0; ch < fgkMaxMuonTrackingChambers; ch++) {
a9e2aefa 789 // number of HitsForRec to 0 for the chamber
790 fNHitsForRecPerChamber[ch] = 0;
791 // index of first HitForRec for the chamber
792 if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
793 else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
52c9bc11 794 rawclusters =fMUONData->RawClusters(ch);
f69d51b5 795// pMUON->ResetRawClusters();
796// TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ????
a9e2aefa 797 nclus = (Int_t) (rawclusters->GetEntries());
798 // Loop over (cathode correlated) raw clusters
799 for (iclus = 0; iclus < nclus; iclus++) {
800 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus);
801 // new AliMUONHitForRec from raw cluster
802 // and increment number of AliMUONHitForRec's (total and in chamber)
803 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus);
804 fNHitsForRec++;
805 (fNHitsForRecPerChamber[ch])++;
806 // more information into HitForRec
807 // resolution: info should be already in raw cluster and taken from it ????
808 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
809 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
810 // original raw cluster
811 hitForRec->SetChamberNumber(ch);
812 hitForRec->SetHitNumber(iclus);
ba5b68db 813 // Z coordinate of the raw cluster (cm)
ba12c242 814 hitForRec->SetZ(clus->GetZ(0));
a9e2aefa 815 if (fPrintLevel >= 10) {
816 cout << "chamber (0...): " << ch <<
817 " raw cluster (0...): " << iclus << endl;
818 clus->Dump();
819 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
820 hitForRec->Dump();}
821 } // end of cluster loop
822 } // end of chamber loop
83dbc640 823 SortHitsForRecWithIncreasingChamber(); //AZ
a9e2aefa 824 return;
825}
826
827 //__________________________________________________________________________
828void AliMUONEventReconstructor::MakeSegments(void)
829{
830 // To make the list of segments in all stations,
831 // from the list of hits to be reconstructed
832 if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl;
833 ResetSegments();
834 // Loop over stations
83dbc640 835 Int_t nb = (fTrackMethod == 2) ? 3 : 0; //AZ
30178c30 836 //AZ for (Int_t st = 0; st < fgkMaxMuonTrackingStations; st++)
837 for (Int_t st = nb; st < fgkMaxMuonTrackingStations; st++) //AZ
a9e2aefa 838 MakeSegmentsPerStation(st);
839 if (fPrintLevel >= 10) {
840 cout << "end of MakeSegments" << endl;
30178c30 841 for (Int_t st = 0; st < fgkMaxMuonTrackingStations; st++) {
a9e2aefa 842 cout << "station(0...): " << st
843 << " Segments: " << fNSegments[st]
844 << endl;
845 for (Int_t seg = 0;
846 seg < fNSegments[st];
847 seg++) {
848 cout << "Segment index(0...): " << seg << endl;
849 ((*fSegmentsPtr[st])[seg])->Dump();
850 }
851 }
852 }
853 return;
854}
855
856 //__________________________________________________________________________
857void AliMUONEventReconstructor::MakeSegmentsPerStation(Int_t Station)
858{
859 // To make the list of segments in station number "Station" (0...)
860 // from the list of hits to be reconstructed.
861 // Updates "fNSegments"[Station].
862 // Segments in stations 4 and 5 are sorted
863 // according to increasing absolute value of "impact parameter"
864 AliMUONHitForRec *hit1Ptr, *hit2Ptr;
865 AliMUONSegment *segment;
866 Bool_t last2st;
867 Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor,
d0bfce8d 868 impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings.
d12a7158 869 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 870 if (fPrintLevel >= 1)
871 cout << "enter MakeSegmentsPerStation (0...) " << Station << endl;
872 // first and second chambers (0...) in the station
873 Int_t ch1 = 2 * Station;
874 Int_t ch2 = ch1 + 1;
875 // variable true for stations downstream of the dipole:
876 // Station(0..4) equal to 3 or 4
877 if ((Station == 3) || (Station == 4)) {
878 last2st = kTRUE;
879 // maximum impact parameter (cm) according to fMinBendingMomentum...
880 maxImpactParam =
881 TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum));
d0bfce8d 882 // minimum impact parameter (cm) according to fMaxBendingMomentum...
883 minImpactParam =
884 TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum));
a9e2aefa 885 }
886 else last2st = kFALSE;
887 // extrapolation factor from Z of first chamber to Z of second chamber
888 // dZ to be changed to take into account fine structure of chambers ????
d12a7158 889 Double_t extrapFact =
890 (&(pMUON->Chamber(ch2)))->Z() / (&(pMUON->Chamber(ch1)))->Z();
a9e2aefa 891 // index for current segment
892 Int_t segmentIndex = 0;
893 // Loop over HitsForRec in the first chamber of the station
894 for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1];
895 hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1];
896 hit1++) {
897 // pointer to the HitForRec
898 hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]);
899 // extrapolation,
900 // on the straight line joining the HitForRec to the vertex (0,0,0),
901 // to the Z of the second chamber of the station
d12a7158 902 extBendCoor = extrapFact * hit1Ptr->GetBendingCoor();
903 extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor();
a9e2aefa 904 // Loop over HitsForRec in the second chamber of the station
905 for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2];
906 hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2];
907 hit2++) {
908 // pointer to the HitForRec
909 hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]);
910 // absolute values of distances, in bending and non bending planes,
911 // between the HitForRec in the second chamber
912 // and the previous extrapolation
913 distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor);
914 distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor);
915 if (last2st) {
916 // bending slope
917 bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) /
918 (hit1Ptr->GetZ() - hit2Ptr->GetZ());
919 // absolute value of impact parameter
920 impactParam =
31817925 921 TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope);
a9e2aefa 922 }
923 // check for distances not too large,
924 // and impact parameter not too big if stations downstream of the dipole.
925 // Conditions "distBend" and "impactParam" correlated for these stations ????
926 if ((distBend < fSegmentMaxDistBending[Station]) &&
927 (distNonBend < fSegmentMaxDistNonBending[Station]) &&
d0bfce8d 928 (!last2st || (impactParam < maxImpactParam)) &&
929 (!last2st || (impactParam > minImpactParam))) {
a9e2aefa 930 // make new segment
931 segment = new ((*fSegmentsPtr[Station])[segmentIndex])
932 AliMUONSegment(hit1Ptr, hit2Ptr);
933 // update "link" to this segment from the hit in the first chamber
934 if (hit1Ptr->GetNSegments() == 0)
935 hit1Ptr->SetIndexOfFirstSegment(segmentIndex);
936 hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1);
937 if (fPrintLevel >= 10) {
938 cout << "segmentIndex(0...): " << segmentIndex
939 << " distBend: " << distBend
940 << " distNonBend: " << distNonBend
941 << endl;
942 segment->Dump();
943 cout << "HitForRec in first chamber" << endl;
944 hit1Ptr->Dump();
945 cout << "HitForRec in second chamber" << endl;
946 hit2Ptr->Dump();
947 };
948 // increment index for current segment
949 segmentIndex++;
950 }
951 } //for (Int_t hit2
952 } // for (Int_t hit1...
953 fNSegments[Station] = segmentIndex;
954 // Sorting according to "impact parameter" if station(1..5) 4 or 5,
955 // i.e. Station(0..4) 3 or 4, using the function "Compare".
956 // After this sorting, it is impossible to use
957 // the "fNSegments" and "fIndexOfFirstSegment"
958 // of the HitForRec in the first chamber to explore all segments formed with it.
959 // Is this sorting really needed ????
960 if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort();
961 if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: "
962 << fNSegments[Station] << endl;
963 return;
964}
965
966 //__________________________________________________________________________
967void AliMUONEventReconstructor::MakeTracks(void)
968{
969 // To make the tracks,
970 // from the list of segments and points in all stations
971 if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl;
8429a5e4 972 // The order may be important for the following Reset's
a9e2aefa 973 ResetTracks();
8429a5e4 974 ResetTrackHits();
83dbc640 975 if (fTrackMethod == 2) { //AZ - Kalman filter
976 MakeTrackCandidatesK();
977 // Follow tracks in stations(1..) 3, 2 and 1
978 FollowTracksK();
979 // Remove double tracks
980 RemoveDoubleTracksK();
981 // Propagate tracks to the vertex thru absorber
982 GoToVertex();
d837040f 983 } else {
83dbc640 984 // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
985 MakeTrackCandidates();
986 // Follow tracks in stations(1..) 3, 2 and 1
987 FollowTracks();
988 // Remove double tracks
989 RemoveDoubleTracks();
d837040f 990 UpdateTrackParamAtHit();
52c9bc11 991 }
a9e2aefa 992 return;
993}
994
276c44b7 995 //__________________________________________________________________________
d837040f 996void AliMUONEventReconstructor::ValidateTracksWithTrigger(void)
997{
7e6d7e07 998 // Try to match track from tracking system with trigger track
d837040f 999 AliMUONTrack *track;
24ab3324 1000 TClonesArray *recTriggerTracks;
1001
1002 fMUONData->ResetRecTriggerTracks();
1003 fMUONData->SetTreeAddress("RL");
1004 fMUONData->GetRecTriggerTracks();
1005 recTriggerTracks = fMUONData->RecTriggerTracks();
e8765288 1006
d837040f 1007 track = (AliMUONTrack*) fRecTracksPtr->First();
1008 while (track) {
1009 track->MatchTriggerTrack(recTriggerTracks);
1010 track = (AliMUONTrack*) fRecTracksPtr->After(track);
e8765288 1011 }
24ab3324 1012
d837040f 1013}
1014
1015 //__________________________________________________________________________
1016Bool_t AliMUONEventReconstructor::MakeTriggerTracks(void)
276c44b7 1017{
1018 // To make the trigger tracks from Local Trigger
1019 if (fPrintLevel >= 1) cout << "enter MakeTriggerTracks" << endl;
52c9bc11 1020 // ResetTriggerTracks();
276c44b7 1021
1022 Int_t nTRentries;
52c9bc11 1023 Long_t gloTrigPat;
276c44b7 1024 TClonesArray *localTrigger;
9131b4fe 1025 TClonesArray *globalTrigger;
276c44b7 1026 AliMUONLocalTrigger *locTrg;
9131b4fe 1027 AliMUONGlobalTrigger *gloTrg;
276c44b7 1028 AliMUONTriggerCircuit *circuit;
52c9bc11 1029 AliMUONTriggerTrack *recTriggerTrack = 0;
d837040f 1030
30178c30 1031 TTree* treeR = fLoader->TreeR();
276c44b7 1032
276c44b7 1033 // Loading MUON subsystem
1034 AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON");
1035
30178c30 1036 nTRentries = Int_t(treeR->GetEntries());
d837040f 1037
30178c30 1038 treeR->GetEvent(0); // only one entry
d837040f 1039
1040 if (!(fMUONData->IsTriggerBranchesInTree())) {
d12a7158 1041 AliWarning(Form("Trigger information is not avalaible, nTRentries = %d not equal to 1",nTRentries));
d837040f 1042 return kFALSE;
276c44b7 1043 }
276c44b7 1044
ce3e25a8 1045 fMUONData->SetTreeAddress("TC");
52c9bc11 1046 fMUONData->GetTrigger();
9131b4fe 1047
52c9bc11 1048 // global trigger for trigger pattern
9131b4fe 1049 gloTrigPat = 0;
52c9bc11 1050 globalTrigger = fMUONData->GlobalTrigger();
9131b4fe 1051 gloTrg = (AliMUONGlobalTrigger*)globalTrigger->UncheckedAt(0);
8efb0686 1052 if (gloTrg) {
1053 if (gloTrg->SinglePlusLpt()) gloTrigPat|= 0x1;
1054 if (gloTrg->SinglePlusHpt()) gloTrigPat|= 0x2;
1055 if (gloTrg->SinglePlusApt()) gloTrigPat|= 0x4;
1056
1057 if (gloTrg->SingleMinusLpt()) gloTrigPat|= 0x8;
1058 if (gloTrg->SingleMinusHpt()) gloTrigPat|= 0x10;
1059 if (gloTrg->SingleMinusApt()) gloTrigPat|= 0x20;
1060
1061 if (gloTrg->SingleUndefLpt()) gloTrigPat|= 0x40;
1062 if (gloTrg->SingleUndefHpt()) gloTrigPat|= 0x80;
1063 if (gloTrg->SingleUndefApt()) gloTrigPat|= 0x100;
1064
1065 if (gloTrg->PairUnlikeLpt()) gloTrigPat|= 0x200;
1066 if (gloTrg->PairUnlikeHpt()) gloTrigPat|= 0x400;
1067 if (gloTrg->PairUnlikeApt()) gloTrigPat|= 0x800;
1068
1069 if (gloTrg->PairLikeLpt()) gloTrigPat|= 0x1000;
1070 if (gloTrg->PairLikeHpt()) gloTrigPat|= 0x2000;
1071 if (gloTrg->PairLikeApt()) gloTrigPat|= 0x4000;
1072 }
9131b4fe 1073
52c9bc11 1074
1075
1076 // local trigger for tracking
1077 localTrigger = fMUONData->LocalTrigger();
276c44b7 1078 Int_t nlocals = (Int_t) (localTrigger->GetEntries());
1079 Float_t z11 = ( &(pMUON->Chamber(10)) )->Z();
1080 Float_t z21 = ( &(pMUON->Chamber(12)) )->Z();
1081
1082 for (Int_t i=0; i<nlocals; i++) { // loop on Local Trigger
52c9bc11 1083 locTrg = (AliMUONLocalTrigger*)localTrigger->UncheckedAt(i);
1084 circuit = &(pMUON->TriggerCircuit(locTrg->LoCircuit()));
1085 Float_t y11 = circuit->GetY11Pos(locTrg->LoStripX());
aeb4f510 1086 Int_t stripX21 = locTrg->LoStripX()+locTrg->LoDev()+1;
1087 Float_t y21 = circuit->GetY21Pos(stripX21);
52c9bc11 1088 Float_t x11 = circuit->GetX11Pos(locTrg->LoStripY());
1089 Float_t thetax = TMath::ATan2( x11 , z11 );
1090 Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) );
1091
1092 recTriggerTrack = new AliMUONTriggerTrack(x11,y11,thetax,thetay,gloTrigPat,this);
1093 // since static statement does not work, set gloTrigPat for each track
1094
1095 // fNRecTriggerTracks++;
1096 fMUONData->AddRecTriggerTrack(*recTriggerTrack);
276c44b7 1097 } // end of loop on Local Trigger
d837040f 1098 return kTRUE;
276c44b7 1099}
1100
a9e2aefa 1101 //__________________________________________________________________________
1102Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment)
1103{
1104 // To make track candidates with two segments in stations(1..) 4 and 5,
1105 // the first segment being pointed to by "BegSegment".
1106 // Returns the number of such track candidates.
1107 Int_t endStation, iEndSegment, nbCan2Seg;
d12a7158 1108 AliMUONSegment *endSegment, *extrapSegment;
a9e2aefa 1109 AliMUONTrack *recTrack;
1110 Double_t mcsFactor;
1111 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl;
1112 // Station for the end segment
1113 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1114 // multiple scattering factor corresponding to one chamber
1115 mcsFactor = 0.0136 /
1116 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1117 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1118 // linear extrapolation to end station
d12a7158 1119 extrapSegment =
1120 BegSegment->CreateSegmentFromLinearExtrapToStation(endStation, mcsFactor);
a9e2aefa 1121 // number of candidates with 2 segments to 0
1122 nbCan2Seg = 0;
1123 // Loop over segments in the end station
1124 for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) {
1125 // pointer to segment
1126 endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]);
1127 // test compatibility between current segment and "extrapSegment"
04b5ea16 1128 // 4 because 4 quantities in chi2
a9e2aefa 1129 if ((endSegment->
1130 NormalizedChi2WithSegment(extrapSegment,
1131 fMaxSigma2Distance)) <= 4.0) {
1132 // both segments compatible:
1133 // make track candidate from "begSegment" and "endSegment"
1134 if (fPrintLevel >= 2)
1135 cout << "TrackCandidate with Segment " << iEndSegment <<
1136 " in Station(0..) " << endStation << endl;
1137 // flag for both segments in one track:
1138 // to be done in track constructor ????
1139 BegSegment->SetInTrack(kTRUE);
1140 endSegment->SetInTrack(kTRUE);
1141 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1142 AliMUONTrack(BegSegment, endSegment, this);
1143 fNRecTracks++;
1144 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1145 // increment number of track candidates with 2 segments
1146 nbCan2Seg++;
1147 }
1148 } // for (iEndSegment = 0;...
1149 delete extrapSegment; // should not delete HitForRec's it points to !!!!
1150 return nbCan2Seg;
1151}
1152
1153 //__________________________________________________________________________
1154Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment)
1155{
1156 // To make track candidates with one segment and one point
1157 // in stations(1..) 4 and 5,
1158 // the segment being pointed to by "BegSegment".
1159 Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit;
d12a7158 1160 AliMUONHitForRec *extrapHitForRec, *hit;
a9e2aefa 1161 AliMUONTrack *recTrack;
1162 Double_t mcsFactor;
1163 if (fPrintLevel >= 1)
1164 cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl;
1165 // station for the end point
1166 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1167 // multiple scattering factor corresponding to one chamber
1168 mcsFactor = 0.0136 /
1169 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1170 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1171 // first and second chambers(0..) in the end station
1172 ch1 = 2 * endStation;
1173 ch2 = ch1 + 1;
1174 // number of candidates to 0
1175 nbCan1Seg1Hit = 0;
1176 // Loop over chambers of the end station
1177 for (ch = ch2; ch >= ch1; ch--) {
d12a7158 1178 // linear extrapolation to chamber
1179 extrapHitForRec =
1180 BegSegment->CreateHitForRecFromLinearExtrapToChamber(ch, mcsFactor);
a9e2aefa 1181 // limits for the hit index in the loop
1182 iHitMin = fIndexOfFirstHitForRecPerChamber[ch];
1183 iHitMax = iHitMin + fNHitsForRecPerChamber[ch];
1184 // Loop over HitForRec's in the chamber
1185 for (iHit = iHitMin; iHit < iHitMax; iHit++) {
1186 // pointer to HitForRec
1187 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
1188 // test compatibility between current HitForRec and "extrapHitForRec"
04b5ea16 1189 // 2 because 2 quantities in chi2
a9e2aefa 1190 if ((hit->
1191 NormalizedChi2WithHitForRec(extrapHitForRec,
1192 fMaxSigma2Distance)) <= 2.0) {
1193 // both HitForRec's compatible:
1194 // make track candidate from begSegment and current HitForRec
1195 if (fPrintLevel >= 2)
1196 cout << "TrackCandidate with HitForRec " << iHit <<
1197 " in Chamber(0..) " << ch << endl;
1198 // flag for beginning segments in one track:
1199 // to be done in track constructor ????
1200 BegSegment->SetInTrack(kTRUE);
1201 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1202 AliMUONTrack(BegSegment, hit, this);
1203 // the right place to eliminate "double counting" ???? how ????
1204 fNRecTracks++;
1205 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1206 // increment number of track candidates
1207 nbCan1Seg1Hit++;
1208 }
1209 } // for (iHit = iHitMin;...
1210 delete extrapHitForRec;
1211 } // for (ch = ch2;...
1212 return nbCan1Seg1Hit;
1213}
1214
1215 //__________________________________________________________________________
1216void AliMUONEventReconstructor::MakeTrackCandidates(void)
1217{
1218 // To make track candidates
1219 // with at least 3 aligned points in stations(1..) 4 and 5
1220 // (two Segment's or one Segment and one HitForRec)
1221 Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg;
1222 AliMUONSegment *begSegment;
1223 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl;
1224 // Loop over stations(1..) 5 and 4 for the beginning segment
1225 for (begStation = 4; begStation > 2; begStation--) {
1226 // Loop over segments in the beginning station
1227 for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) {
1228 // pointer to segment
1229 begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]);
1230 if (fPrintLevel >= 2)
1231 cout << "look for TrackCandidate's with Segment " << iBegSegment <<
1232 " in Station(0..) " << begStation << endl;
1233 // Look for track candidates with two segments,
1234 // "begSegment" and all compatible segments in other station.
1235 // Only for beginning station(1..) 5
1236 // because candidates with 2 segments have to looked for only once.
1237 if (begStation == 4)
1238 nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment);
956019b6 1239 // Look for track candidates with one segment and one point,
a9e2aefa 1240 // "begSegment" and all compatible HitForRec's in other station.
1241 // Only if "begSegment" does not belong already to a track candidate.
1242 // Is that a too strong condition ????
1243 if (!(begSegment->GetInTrack()))
1244 nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment);
1245 } // for (iBegSegment = 0;...
1246 } // for (begStation = 4;...
1247 return;
1248}
1249
1250 //__________________________________________________________________________
1251void AliMUONEventReconstructor::FollowTracks(void)
1252{
1253 // Follow tracks in stations(1..) 3, 2 and 1
04b5ea16 1254 // too long: should be made more modular !!!!
d12a7158 1255 AliMUONHitForRec *bestHit, *extrapHit, *extrapCorrHit, *hit;
1256 AliMUONSegment *bestSegment, *extrapSegment, *extrapCorrSegment, *segment;
04b5ea16 1257 AliMUONTrack *track, *nextTrack;
1258 AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex;
ecfa008b 1259 // -1 to avoid compilation warnings
1260 Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex;
04b5ea16 1261 Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor;
d0bfce8d 1262 Double_t bendingMomentum, chi2Norm = 0.;
9cbdf048 1263 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
04b5ea16 1264 // local maxSigma2Distance, for easy increase in testing
1265 maxSigma2Distance = fMaxSigma2Distance;
a9e2aefa 1266 if (fPrintLevel >= 2)
1267 cout << "enter FollowTracks" << endl;
1268 // Loop over track candidates
04b5ea16 1269 track = (AliMUONTrack*) fRecTracksPtr->First();
1270 trackIndex = -1;
1271 while (track) {
1272 // Follow function for each track candidate ????
1273 trackIndex++;
1274 nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track
a9e2aefa 1275 if (fPrintLevel >= 2)
1276 cout << "FollowTracks: track candidate(0..): " << trackIndex << endl;
956019b6 1277 // Fit track candidate
1278 track->SetFitMCS(0); // without multiple Coulomb scattering
1279 track->SetFitNParam(3); // with 3 parameters (X = Y = 0)
1280 track->SetFitStart(0); // from parameters at vertex
1281 track->Fit();
a9e2aefa 1282 if (fPrintLevel >= 10) {
1283 cout << "FollowTracks: track candidate(0..): " << trackIndex
956019b6 1284 << " after fit in stations(0..) 3 and 4" << endl;
a9e2aefa 1285 track->RecursiveDump();
1286 }
1287 // Loop over stations(1..) 3, 2 and 1
04b5ea16 1288 // something SPECIAL for stations 2 and 1 for majority 3 coincidence ????
1289 // otherwise: majority coincidence 2 !!!!
a9e2aefa 1290 for (station = 2; station >= 0; station--) {
1291 // Track parameters at first track hit (smallest Z)
1292 trackParam1 = ((AliMUONTrackHit*)
1293 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1294 // extrapolation to station
1295 trackParam1->ExtrapToStation(station, trackParam);
79e1e601 1296 extrapSegment = new AliMUONSegment(); // empty segment
d12a7158 1297 extrapCorrSegment = new AliMUONSegment(); // empty corrected segment
a9e2aefa 1298 // multiple scattering factor corresponding to one chamber
1299 // and momentum in bending plane (not total)
1300 mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum();
1301 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1302 // Z difference from previous station
9cbdf048 1303 dZ1 = (&(pMUON->Chamber(2 * station)))->Z() -
1304 (&(pMUON->Chamber(2 * station + 2)))->Z();
a9e2aefa 1305 // Z difference between the two previous stations
9cbdf048 1306 dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() -
1307 (&(pMUON->Chamber(2 * station + 4)))->Z();
04b5ea16 1308 // Z difference between the two chambers in the previous station
1309 dZ3 = (&(pMUON->Chamber(2 * station)))->Z() -
1310 (&(pMUON->Chamber(2 * station + 1)))->Z();
1311 extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1312 extrapSegment->
1313 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1314 extrapSegment->UpdateFromStationTrackParam
1315 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1316 trackParam1->GetInverseBendingMomentum());
d12a7158 1317 // same thing for corrected segment
1318 // better to use copy constructor, after checking that it works properly !!!!
1319 extrapCorrSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1320 extrapCorrSegment->
1321 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1322 extrapCorrSegment->UpdateFromStationTrackParam
1323 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1324 trackParam1->GetInverseBendingMomentum());
a9e2aefa 1325 bestChi2 = 5.0;
1326 bestSegment = NULL;
1327 if (fPrintLevel >= 10) {
1328 cout << "FollowTracks: track candidate(0..): " << trackIndex
1329 << " Look for segment in station(0..): " << station << endl;
1330 }
1331 // Loop over segments in station
1332 for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) {
1333 // Look for best compatible Segment in station
1334 // should consider all possibilities ????
1335 // multiple scattering ????
1336 // separation in 2 functions: Segment and HitForRec ????
1337 segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]);
d0bfce8d 1338 // correction of corrected segment (fBendingCoor and fNonBendingCoor)
1339 // according to real Z value of "segment" and slopes of "extrapSegment"
d12a7158 1340 extrapCorrSegment->
1341 SetBendingCoor(extrapSegment->GetBendingCoor() +
1342 extrapSegment->GetBendingSlope() *
1343 (segment->GetHitForRec1()->GetZ() -
1344 (&(pMUON->Chamber(2 * station)))->Z()));
1345 extrapCorrSegment->
1346 SetNonBendingCoor(extrapSegment->GetNonBendingCoor() +
1347 extrapSegment->GetNonBendingSlope() *
1348 (segment->GetHitForRec1()->GetZ() -
1349 (&(pMUON->Chamber(2 * station)))->Z()));
d0bfce8d 1350 chi2 = segment->
d12a7158 1351 NormalizedChi2WithSegment(extrapCorrSegment, maxSigma2Distance);
a9e2aefa 1352 if (chi2 < bestChi2) {
1353 // update best Chi2 and Segment if better found
1354 bestSegment = segment;
1355 bestChi2 = chi2;
1356 }
1357 }
1358 if (bestSegment) {
1359 // best segment found: add it to track candidate
1360 track->AddSegment(bestSegment);
1361 // set track parameters at these two TrakHit's
1362 track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0]));
1363 track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1]));
1364 if (fPrintLevel >= 10) {
1365 cout << "FollowTracks: track candidate(0..): " << trackIndex
1366 << " Added segment in station(0..): " << station << endl;
1367 track->RecursiveDump();
1368 }
1369 }
1370 else {
1371 // No best segment found:
1372 // Look for best compatible HitForRec in station:
1373 // should consider all possibilities ????
1374 // multiple scattering ???? do about like for extrapSegment !!!!
79e1e601 1375 extrapHit = new AliMUONHitForRec(); // empty hit
d12a7158 1376 extrapCorrHit = new AliMUONHitForRec(); // empty corrected hit
a9e2aefa 1377 bestChi2 = 3.0;
1378 bestHit = NULL;
1379 if (fPrintLevel >= 10) {
1380 cout << "FollowTracks: track candidate(0..): " << trackIndex
1381 << " Segment not found, look for hit in station(0..): " << station
1382 << endl;
1383 }
1384 // Loop over chambers of the station
d82671a0 1385 for (chInStation = 0; chInStation < 2; chInStation++) {
d12a7158 1386 // coordinates of extrapolated hit
1387 extrapHit->
1388 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1389 extrapHit->
1390 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
1391 // resolutions from "extrapSegment"
1392 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1393 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
1394 // same things for corrected hit
1395 // better to use copy constructor, after checking that it works properly !!!!
1396 extrapCorrHit->
1397 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1398 extrapCorrHit->
1399 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
1400 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1401 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
1402 // Loop over hits in the chamber
956019b6 1403 ch = 2 * station + chInStation;
a9e2aefa 1404 for (iHit = fIndexOfFirstHitForRecPerChamber[ch];
1405 iHit < fIndexOfFirstHitForRecPerChamber[ch] +
1406 fNHitsForRecPerChamber[ch];
1407 iHit++) {
1408 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
d12a7158 1409 // correction of corrected hit (fBendingCoor and fNonBendingCoor)
1410 // according to real Z value of "hit" and slopes of right "trackParam"
1411 extrapCorrHit->
1412 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor() +
1413 (&(trackParam[chInStation]))->GetBendingSlope() *
1414 (hit->GetZ() -
1415 (&(trackParam[chInStation]))->GetZ()));
1416 extrapCorrHit->
1417 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor() +
1418 (&(trackParam[chInStation]))->GetNonBendingSlope() *
1419 (hit->GetZ() -
1420 (&(trackParam[chInStation]))->GetZ()));
a9e2aefa 1421 // condition for hit not already in segment ????
1422 chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance);
1423 if (chi2 < bestChi2) {
1424 // update best Chi2 and HitForRec if better found
1425 bestHit = hit;
1426 bestChi2 = chi2;
d82671a0 1427 chBestHit = chInStation;
a9e2aefa 1428 }
1429 }
1430 }
1431 if (bestHit) {
1432 // best hit found: add it to track candidate
1433 track->AddHitForRec(bestHit);
956019b6 1434 // set track parameters at this TrackHit
a9e2aefa 1435 track->SetTrackParamAtHit(track->GetNTrackHits() - 1,
1436 &(trackParam[chBestHit]));
1437 if (fPrintLevel >= 10) {
1438 cout << "FollowTracks: track candidate(0..): " << trackIndex
1439 << " Added hit in station(0..): " << station << endl;
1440 track->RecursiveDump();
1441 }
1442 }
1443 else {
8429a5e4 1444 // Remove current track candidate
1445 // and corresponding TrackHit's, ...
1446 track->Remove();
04b5ea16 1447 delete extrapSegment;
d12a7158 1448 delete extrapCorrSegment;
d0bfce8d 1449 delete extrapHit;
d12a7158 1450 delete extrapCorrHit;
a9e2aefa 1451 break; // stop the search for this candidate:
1452 // exit from the loop over station
1453 }
d0bfce8d 1454 delete extrapHit;
d12a7158 1455 delete extrapCorrHit;
a9e2aefa 1456 }
04b5ea16 1457 delete extrapSegment;
d12a7158 1458 delete extrapCorrSegment;
a9e2aefa 1459 // Sort track hits according to increasing Z
1460 track->GetTrackHitsPtr()->Sort();
1461 // Update track parameters at first track hit (smallest Z)
1462 trackParam1 = ((AliMUONTrackHit*)
1463 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
d0bfce8d 1464 bendingMomentum = 0.;
1465 if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.)
1466 bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum()));
1467 // Track removed if bendingMomentum not in window [min, max]
1468 if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) {
1469 track->Remove();
1470 break; // stop the search for this candidate:
1471 // exit from the loop over station
1472 }
956019b6 1473 // Track fit
04b5ea16 1474 // with multiple Coulomb scattering if all stations
1475 if (station == 0) track->SetFitMCS(1);
956019b6 1476 // without multiple Coulomb scattering if not all stations
04b5ea16 1477 else track->SetFitMCS(0);
956019b6 1478 track->SetFitNParam(5); // with 5 parameters (momentum and position)
1479 track->SetFitStart(1); // from parameters at first hit
1480 track->Fit();
d0bfce8d 1481 Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5);
1482 if (numberOfDegFree > 0) {
1483 chi2Norm = track->GetFitFMin() / numberOfDegFree;
1484 } else {
1485 chi2Norm = 1.e10;
1486 }
1487 // Track removed if normalized chi2 too high
1488 if (chi2Norm > fMaxChi2) {
1489 track->Remove();
1490 break; // stop the search for this candidate:
1491 // exit from the loop over station
1492 }
a9e2aefa 1493 if (fPrintLevel >= 10) {
1494 cout << "FollowTracks: track candidate(0..): " << trackIndex
1495 << " after fit from station(0..): " << station << " to 4" << endl;
1496 track->RecursiveDump();
1497 }
04b5ea16 1498 // Track extrapolation to the vertex through the absorber (Branson)
956019b6 1499 // after going through the first station
04b5ea16 1500 if (station == 0) {
1501 trackParamVertex = *trackParam1;
1502 (&trackParamVertex)->ExtrapToVertex();
1503 track->SetTrackParamAtVertex(&trackParamVertex);
6ae236ee 1504 if (fPrintLevel >= 1) {
1505 cout << "FollowTracks: track candidate(0..): " << trackIndex
1506 << " after extrapolation to vertex" << endl;
1507 track->RecursiveDump();
1508 }
04b5ea16 1509 }
a9e2aefa 1510 } // for (station = 2;...
04b5ea16 1511 // go really to next track
1512 track = nextTrack;
1513 } // while (track)
1514 // Compression of track array (necessary after Remove ????)
1515 fRecTracksPtr->Compress();
1516 return;
1517}
1518
1519 //__________________________________________________________________________
8429a5e4 1520void AliMUONEventReconstructor::RemoveDoubleTracks(void)
1521{
1522 // To remove double tracks.
1523 // Tracks are considered identical
1524 // if they have at least half of their hits in common.
1525 // Among two identical tracks, one keeps the track with the larger number of hits
1526 // or, if these numbers are equal, the track with the minimum Chi2.
1527 AliMUONTrack *track1, *track2, *trackToRemove;
1528 Bool_t identicalTracks;
1529 Int_t hitsInCommon, nHits1, nHits2;
1530 identicalTracks = kTRUE;
1531 while (identicalTracks) {
1532 identicalTracks = kFALSE;
1533 // Loop over first track of the pair
1534 track1 = (AliMUONTrack*) fRecTracksPtr->First();
1535 while (track1 && (!identicalTracks)) {
1536 nHits1 = track1->GetNTrackHits();
1537 // Loop over second track of the pair
1538 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1539 while (track2 && (!identicalTracks)) {
1540 nHits2 = track2->GetNTrackHits();
1541 // number of hits in common between two tracks
1542 hitsInCommon = track1->HitsInCommon(track2);
1543 // check for identical tracks
1544 if ((4 * hitsInCommon) >= (nHits1 + nHits2)) {
1545 identicalTracks = kTRUE;
1546 // decide which track to remove
1547 if (nHits1 > nHits2) trackToRemove = track2;
1548 else if (nHits1 < nHits2) trackToRemove = track1;
1549 else if ((track1->GetFitFMin()) < (track2->GetFitFMin()))
1550 trackToRemove = track2;
1551 else trackToRemove = track1;
1552 // remove it
1553 trackToRemove->Remove();
1554 }
1555 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
1556 } // track2
1557 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1558 } // track1
1559 }
1560 return;
1561}
1562
d837040f 1563 //__________________________________________________________________________
1564void AliMUONEventReconstructor::UpdateTrackParamAtHit()
1565{
1566 // Set track parameters after track fitting. Fill fTrackParamAtHit of AliMUONTrack's
1567 AliMUONTrack *track;
1568 AliMUONTrackHit *trackHit;
1569 AliMUONTrackParam *trackParam;
1570 track = (AliMUONTrack*) fRecTracksPtr->First();
1571 while (track) {
1572 trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First();
1573 while (trackHit) {
1574 trackParam = trackHit->GetTrackParam();
1575 track->AddTrackParamAtHit(trackParam);
1576 trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit);
1577 } // trackHit
1578 track = (AliMUONTrack*) fRecTracksPtr->After(track);
1579 } // track
1580 return;
1581}
1582
8429a5e4 1583 //__________________________________________________________________________
04b5ea16 1584void AliMUONEventReconstructor::EventDump(void)
1585{
1586 // Dump reconstructed event (track parameters at vertex and at first hit),
1587 // and the particle parameters
1588
1589 AliMUONTrack *track;
1590 AliMUONTrackParam *trackParam, *trackParam1;
04b5ea16 1591 Double_t bendingSlope, nonBendingSlope, pYZ;
1592 Double_t pX, pY, pZ, x, y, z, c;
1593 Int_t np, trackIndex, nTrackHits;
1594
1595 if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl;
1596 if (fPrintLevel >= 1) {
1597 cout << " Number of Reconstructed tracks :" << fNRecTracks << endl;
1598 }
1599 fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole
1600 // Loop over reconstructed tracks
1601 for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) {
83dbc640 1602 if (fTrackMethod != 1) continue; //AZ - skip the rest for now
04b5ea16 1603 if (fPrintLevel >= 1)
1604 cout << " track number: " << trackIndex << endl;
1605 // function for each track for modularity ????
1606 track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]);
1607 nTrackHits = track->GetNTrackHits();
1608 if (fPrintLevel >= 1)
1609 cout << " number of track hits: " << nTrackHits << endl;
1610 // track parameters at Vertex
1611 trackParam = track->GetTrackParamAtVertex();
1612 x = trackParam->GetNonBendingCoor();
1613 y = trackParam->GetBendingCoor();
1614 z = trackParam->GetZ();
1615 bendingSlope = trackParam->GetBendingSlope();
1616 nonBendingSlope = trackParam->GetNonBendingSlope();
1617 pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
1618 pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope);
1619 pX = pZ * nonBendingSlope;
1620 pY = pZ * bendingSlope;
1621 c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum());
1622 if (fPrintLevel >= 1)
1623 printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1624 z, x, y, pX, pY, pZ, c);
1625
1626 // track parameters at first hit
1627 trackParam1 = ((AliMUONTrackHit*)
1628 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1629 x = trackParam1->GetNonBendingCoor();
1630 y = trackParam1->GetBendingCoor();
1631 z = trackParam1->GetZ();
1632 bendingSlope = trackParam1->GetBendingSlope();
1633 nonBendingSlope = trackParam1->GetNonBendingSlope();
1634 pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum());
1635 pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope);
1636 pX = pZ * nonBendingSlope;
1637 pY = pZ * bendingSlope;
1638 c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum());
1639 if (fPrintLevel >= 1)
1640 printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1641 z, x, y, pX, pY, pZ, c);
1642 }
1643 // informations about generated particles
5d12ce38 1644 np = gAlice->GetMCApp()->GetNtrack();
04b5ea16 1645 printf(" **** number of generated particles: %d \n", np);
1646
88cb7938 1647// for (Int_t iPart = 0; iPart < np; iPart++) {
1648// p = gAlice->Particle(iPart);
1649// printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n",
1650// iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode());
1651// }
a9e2aefa 1652 return;
1653}
1654
276c44b7 1655
1656//__________________________________________________________________________
1657void AliMUONEventReconstructor::EventDumpTrigger(void)
1658{
1659 // Dump reconstructed trigger event
1660 // and the particle parameters
1661
52c9bc11 1662 AliMUONTriggerTrack *triggertrack ;
1663 Int_t nTriggerTracks = fMUONData->RecTriggerTracks()->GetEntriesFast();
276c44b7 1664
276c44b7 1665 if (fPrintLevel >= 1) {
52c9bc11 1666 cout << "****** enter EventDumpTrigger ******" << endl;
1667 cout << " Number of Reconstructed tracks :" << nTriggerTracks << endl;
276c44b7 1668 }
1669 // Loop over reconstructed tracks
52c9bc11 1670 for (Int_t trackIndex = 0; trackIndex < nTriggerTracks; trackIndex++) {
1671 triggertrack = (AliMUONTriggerTrack*)fMUONData->RecTriggerTracks()->At(trackIndex);
276c44b7 1672 printf(" trigger track number %i x11=%f y11=%f thetax=%f thetay=%f \n",
1673 trackIndex,
1674 triggertrack->GetX11(),triggertrack->GetY11(),
1675 triggertrack->GetThetax(),triggertrack->GetThetay());
1676 }
1677}
1678
1679//__________________________________________________________________________
c7ba256d 1680void AliMUONEventReconstructor::FillEvent()
1681{
1682// Create a new AliMUONRecoEvent, fill its track list, then add it as a
1683// leaf in the Event branch of TreeRecoEvent tree
1684 cout << "Enter FillEvent() ...\n";
1685
1686 if (!fRecoEvent) {
1687 fRecoEvent = new AliMUONRecoEvent();
1688 } else {
1689 fRecoEvent->Clear();
1690 }
1691 //save current directory
1692 TDirectory *current = gDirectory;
1693 if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE");
1694 if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events");
83dbc640 1695 //AZif (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) {
1696 if (fRecoEvent->MakeDumpTracks(fMuons, fRecTracksPtr, this)) { //AZ
c7ba256d 1697 if (fPrintLevel > 1) fRecoEvent->EventInfo();
1698 TBranch *branch = fEventTree->GetBranch("Event");
d0f40f23 1699 if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000);
c7ba256d 1700 branch->SetAutoDelete();
1701 fTreeFile->cd();
1702 fEventTree->Fill();
1703 fTreeFile->Write();
1704 }
1705 // restore directory
1706 current->cd();
1707}
83dbc640 1708
1709//__________________________________________________________________________
1710void AliMUONEventReconstructor::MakeTrackCandidatesK(void)
1711{
1712 // To make initial tracks for Kalman filter from the list of segments
1713 Int_t istat, iseg;
1714 AliMUONSegment *segment;
1715 AliMUONTrackK *trackK;
1716
1717 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesK" << endl;
1718 // Reset the TClonesArray of reconstructed tracks
1719 if (fRecTracksPtr) fRecTracksPtr->Delete();
1720 // Delete in order that the Track destructors are called,
1721 // hence the space for the TClonesArray of pointers to TrackHit's is freed
1722 fNRecTracks = 0;
1723
1724 AliMUONTrackK a(this, fHitsForRecPtr); // bad idea ???
1725 // Loop over stations(1...) 5 and 4
1726 for (istat=4; istat>=3; istat--) {
1727 // Loop over segments in the station
1728 for (iseg=0; iseg<fNSegments[istat]; iseg++) {
1729 // Transform segments to tracks and evaluate covariance matrix
1730 segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]);
1731 trackK = new ((*fRecTracksPtr)[fNRecTracks]) AliMUONTrackK(segment);
1732 fNRecTracks++;
1733 } // for (iseg=0;...)
1734 } // for (istat=4;...)
1735 return;
1736}
1737
1738//__________________________________________________________________________
1739void AliMUONEventReconstructor::FollowTracksK(void)
1740{
1741 // Follow tracks using Kalman filter
30178c30 1742 Bool_t ok;
83dbc640 1743 Int_t icand, ichamBeg, ichamEnd, chamBits;
1744 Double_t zDipole1, zDipole2;
1745 AliMUONTrackK *trackK;
1746 AliMUONHitForRec *hit;
1747 AliMUONRawCluster *clus;
1748 TClonesArray *rawclusters;
1749 AliMUON *pMUON;
1750 clus = 0; rawclusters = 0;
1751
1752 zDipole1 = GetSimpleBPosition() - GetSimpleBLength()/2;
1753 zDipole2 = zDipole1 + GetSimpleBLength();
1754
1755 // Print hits
1756 pMUON = (AliMUON*) gAlice->GetModule("MUON");
1757 for (Int_t i1=0; i1<fNHitsForRec; i1++) {
1758 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]);
1759 //if (hit->GetTHTrack() > 1 || hit->GetGeantSignal() == 0) continue;
1760 /*
1761 cout << " Hit #" << hit->GetChamberNumber() << " ";
1762 cout << hit->GetBendingCoor() << " ";
1763 cout << hit->GetNonBendingCoor() << " ";
1764 cout << hit->GetZ() << " ";
1765 cout << hit->GetGeantSignal() << " ";
1766 cout << hit->GetTHTrack() << endl;
1767 */
1768 /*
1769 printf(" Hit # %d %10.4f %10.4f %10.4f",
1770 hit->GetChamberNumber(), hit->GetBendingCoor(),
1771 hit->GetNonBendingCoor(), hit->GetZ());
1772 if (fRecGeantHits) {
1773 // from GEANT hits
1774 printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack());
1775 } else {
1776 // from raw clusters
1777 rawclusters = pMUON->RawClustAddress(hit->GetChamberNumber());
1778 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->
1779 GetHitNumber());
1780 printf("%3d", clus->fTracks[1]-1);
1781 if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1);
1782 else printf("\n");
1783 }
1784 */
1785 }
1786
1787 icand = -1;
1788 Int_t nSeeds = fNRecTracks; // starting number of seeds
1789 // Loop over track candidates
1790 while (icand < fNRecTracks-1) {
1791 icand ++;
1792 trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]);
1793
1794 // Discard candidate which will produce the double track
1795 if (icand > 0) {
30178c30 1796 ok = CheckCandidateK(icand,nSeeds);
1797 if (!ok) {
83dbc640 1798 //trackK->SetRecover(-1); // mark candidate to be removed
1799 //continue;
1800 }
1801 }
1802
30178c30 1803 ok = kTRUE;
83dbc640 1804 if (trackK->GetRecover() == 0) hit = (AliMUONHitForRec*)
1805 trackK->GetHitOnTrack()->Last(); // last hit
1806 else hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[1]; // 2'nd hit
1807 ichamBeg = hit->GetChamberNumber();
1808 ichamEnd = 0;
1809 // Check propagation direction
1810 if (trackK->GetTrackDir() > 0) {
1811 ichamEnd = 9; // forward propagation
30178c30 1812 ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2);
1813 if (ok) {
83dbc640 1814 ichamBeg = ichamEnd;
1815 ichamEnd = 6; // backward propagation
1816 // Change weight matrix and zero fChi2 for backpropagation
1817 trackK->StartBack();
30178c30 1818 ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2);
83dbc640 1819 ichamBeg = ichamEnd;
1820 ichamEnd = 0;
1821 }
1822 } else {
1823 if (trackK->GetBPFlag()) {
1824 // backpropagation
1825 ichamEnd = 6; // backward propagation
1826 // Change weight matrix and zero fChi2 for backpropagation
1827 trackK->StartBack();
30178c30 1828 ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2);
83dbc640 1829 ichamBeg = ichamEnd;
1830 ichamEnd = 0;
1831 }
1832 }
1833
30178c30 1834 if (ok) {
83dbc640 1835 trackK->SetTrackDir(-1);
1836 trackK->SetBPFlag(kFALSE);
30178c30 1837 ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2);
83dbc640 1838 }
30178c30 1839 if (ok) trackK->SetTrackQuality(0); // compute "track quality"
83dbc640 1840 else trackK->SetRecover(-1); // mark candidate to be removed
1841
1842 // Majority 3 of 4 in first 2 stations
1843 chamBits = 0;
1844 for (Int_t i=0; i<trackK->GetNTrackHits(); i++) {
1845 hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[i];
1846 chamBits |= BIT(hit->GetChamberNumber()-1);
1847 }
1848 //if (!((chamBits&3)==3 || (chamBits>>2&3)==3)) trackK->SetRecover(-1);
1849 //mark candidate to be removed
1850 } // while
1851
1852 for (Int_t i=0; i<fNRecTracks; i++) {
1853 trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]);
1854 if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i);
1855 }
1856
1857 // Compress TClonesArray
1858 fRecTracksPtr->Compress();
1859 fNRecTracks = fRecTracksPtr->GetEntriesFast();
1860 return;
1861}
1862
1863//__________________________________________________________________________
30178c30 1864Bool_t AliMUONEventReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds) const
83dbc640 1865{
1866 // Discards track candidate if it will produce the double track (having
1867 // the same seed segment hits as hits of a good track found before)
1868 AliMUONTrackK *track1, *track2;
1869 AliMUONHitForRec *hit1, *hit2, *hit;
1870
1871 track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]);
1872 hit1 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[0]; // 1'st hit
1873 hit2 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[1]; // 2'nd hit
1874
1875 for (Int_t i=0; i<icand; i++) {
1876 track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]);
1877 //if (track2->GetRecover() < 0) continue;
1878 if (track2->GetRecover() < 0 && icand >= nSeeds) continue;
1879
1880 if (track1->GetStartSegment() == track2->GetStartSegment()) {
1881 return kFALSE;
1882 } else {
1883 Int_t nSame = 0;
1884 for (Int_t j=0; j<track2->GetNTrackHits(); j++) {
1885 hit = (AliMUONHitForRec*) (*track2->GetHitOnTrack())[j];
1886 if (hit == hit1 || hit == hit2) {
1887 nSame++;
1888 if (nSame == 2) return kFALSE;
1889 }
1890 } // for (Int_t j=0;
1891 }
1892 } // for (Int_t i=0;
1893 return kTRUE;
1894}
1895
1896//__________________________________________________________________________
1897void AliMUONEventReconstructor::RemoveDoubleTracksK(void)
1898{
1899 // Removes double tracks (sharing more than half of their hits). Keeps
1900 // the track with higher quality
1901 AliMUONTrackK *track1, *track2, *trackToKill;
1902
1903 // Sort tracks according to their quality
1904 fRecTracksPtr->Sort();
1905
1906 // Loop over first track of the pair
1907 track1 = (AliMUONTrackK*) fRecTracksPtr->First();
1908 while (track1) {
1909 // Loop over second track of the pair
1910 track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1);
1911 while (track2) {
1912 // Check whether or not to keep track2
1913 if (!track2->KeepTrack(track1)) {
1914 cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) <<
1915 " " << track2->GetTrackQuality() << endl;
1916 trackToKill = track2;
1917 track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2);
1918 trackToKill->Kill();
1919 fRecTracksPtr->Compress();
1920 } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2);
1921 } // track2
1922 track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1);
1923 } // track1
1924
1925 fNRecTracks = fRecTracksPtr->GetEntriesFast();
1926 cout << " Number of Kalman tracks: " << fNRecTracks << endl;
1927}
1928
1929//__________________________________________________________________________
1930void AliMUONEventReconstructor::GoToVertex(void)
1931{
1932 // Propagates track to the vertex thru absorber
1933 // (using Branson correction for now)
1934
1935 Double_t zVertex;
1936 zVertex = 0;
1937 for (Int_t i=0; i<fNRecTracks; i++) {
1938 //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson();
1939 //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber
1940 ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2
1941 ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(); // with absorber
1942 }
1943}