Fixes in alimdc package in order to be able to compile the code without HLT
[u/mrichter/AliRoot.git] / MUON / AliMUONEventReconstructor.cxx
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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"
8c343c7c 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
8c343c7c 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
8c343c7c 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);
e516b01d 232 fSegmentMaxDistBending[1] = TMath::Abs( 1.5 *
ef21c79e 233 ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0);
e516b01d 234 fSegmentMaxDistBending[2] = TMath::Abs( 3.0 *
ef21c79e 235 ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0);
e516b01d 236 fSegmentMaxDistBending[3] = TMath::Abs( 6.0 *
ef21c79e 237 ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0);
e516b01d 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) {
8c343c7c 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) {
8c343c7c 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 {
8c343c7c 492 AliError("Error occured while loading hits.");
88cb7938 493 return;
494 }
52c9bc11 495 treeH = fLoader->TreeH();
88cb7938 496 if (treeH == 0x0)
497 {
8c343c7c 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) {
8c343c7c 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.
a9e2aefa 869 if (fPrintLevel >= 1)
870 cout << "enter MakeSegmentsPerStation (0...) " << Station << endl;
871 // first and second chambers (0...) in the station
872 Int_t ch1 = 2 * Station;
873 Int_t ch2 = ch1 + 1;
874 // variable true for stations downstream of the dipole:
875 // Station(0..4) equal to 3 or 4
876 if ((Station == 3) || (Station == 4)) {
877 last2st = kTRUE;
878 // maximum impact parameter (cm) according to fMinBendingMomentum...
879 maxImpactParam =
880 TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum));
d0bfce8d 881 // minimum impact parameter (cm) according to fMaxBendingMomentum...
882 minImpactParam =
883 TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum));
a9e2aefa 884 }
885 else last2st = kFALSE;
886 // extrapolation factor from Z of first chamber to Z of second chamber
887 // dZ to be changed to take into account fine structure of chambers ????
e516b01d 888 Double_t extrapFact;
a9e2aefa 889 // index for current segment
890 Int_t segmentIndex = 0;
891 // Loop over HitsForRec in the first chamber of the station
892 for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1];
893 hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1];
894 hit1++) {
895 // pointer to the HitForRec
896 hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]);
897 // extrapolation,
898 // on the straight line joining the HitForRec to the vertex (0,0,0),
899 // to the Z of the second chamber of the station
a9e2aefa 900 // Loop over HitsForRec in the second chamber of the station
901 for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2];
902 hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2];
903 hit2++) {
904 // pointer to the HitForRec
905 hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]);
906 // absolute values of distances, in bending and non bending planes,
907 // between the HitForRec in the second chamber
908 // and the previous extrapolation
e516b01d 909 extrapFact = hit2Ptr->GetZ()/ hit1Ptr->GetZ();
910 extBendCoor = extrapFact * hit1Ptr->GetBendingCoor();
911 extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor();
a9e2aefa 912 distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor);
913 distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor);
914 if (last2st) {
915 // bending slope
916 bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) /
917 (hit1Ptr->GetZ() - hit2Ptr->GetZ());
918 // absolute value of impact parameter
919 impactParam =
31817925 920 TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope);
a9e2aefa 921 }
922 // check for distances not too large,
923 // and impact parameter not too big if stations downstream of the dipole.
924 // Conditions "distBend" and "impactParam" correlated for these stations ????
925 if ((distBend < fSegmentMaxDistBending[Station]) &&
926 (distNonBend < fSegmentMaxDistNonBending[Station]) &&
d0bfce8d 927 (!last2st || (impactParam < maxImpactParam)) &&
928 (!last2st || (impactParam > minImpactParam))) {
a9e2aefa 929 // make new segment
930 segment = new ((*fSegmentsPtr[Station])[segmentIndex])
931 AliMUONSegment(hit1Ptr, hit2Ptr);
932 // update "link" to this segment from the hit in the first chamber
933 if (hit1Ptr->GetNSegments() == 0)
934 hit1Ptr->SetIndexOfFirstSegment(segmentIndex);
935 hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1);
936 if (fPrintLevel >= 10) {
937 cout << "segmentIndex(0...): " << segmentIndex
938 << " distBend: " << distBend
939 << " distNonBend: " << distNonBend
940 << endl;
941 segment->Dump();
942 cout << "HitForRec in first chamber" << endl;
943 hit1Ptr->Dump();
944 cout << "HitForRec in second chamber" << endl;
945 hit2Ptr->Dump();
946 };
947 // increment index for current segment
948 segmentIndex++;
949 }
950 } //for (Int_t hit2
951 } // for (Int_t hit1...
952 fNSegments[Station] = segmentIndex;
953 // Sorting according to "impact parameter" if station(1..5) 4 or 5,
954 // i.e. Station(0..4) 3 or 4, using the function "Compare".
955 // After this sorting, it is impossible to use
956 // the "fNSegments" and "fIndexOfFirstSegment"
957 // of the HitForRec in the first chamber to explore all segments formed with it.
958 // Is this sorting really needed ????
959 if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort();
960 if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: "
961 << fNSegments[Station] << endl;
962 return;
963}
964
965 //__________________________________________________________________________
966void AliMUONEventReconstructor::MakeTracks(void)
967{
968 // To make the tracks,
969 // from the list of segments and points in all stations
970 if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl;
8429a5e4 971 // The order may be important for the following Reset's
a9e2aefa 972 ResetTracks();
8429a5e4 973 ResetTrackHits();
83dbc640 974 if (fTrackMethod == 2) { //AZ - Kalman filter
975 MakeTrackCandidatesK();
976 // Follow tracks in stations(1..) 3, 2 and 1
977 FollowTracksK();
978 // Remove double tracks
979 RemoveDoubleTracksK();
980 // Propagate tracks to the vertex thru absorber
981 GoToVertex();
d837040f 982 } else {
83dbc640 983 // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
984 MakeTrackCandidates();
985 // Follow tracks in stations(1..) 3, 2 and 1
986 FollowTracks();
987 // Remove double tracks
988 RemoveDoubleTracks();
d837040f 989 UpdateTrackParamAtHit();
b8dc484b 990 UpdateHitForRecAtHit();
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())) {
8c343c7c 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;
e516b01d 1108 AliMUONSegment *endSegment;
1109 AliMUONSegment *extrapSegment = NULL;
a9e2aefa 1110 AliMUONTrack *recTrack;
1111 Double_t mcsFactor;
1112 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl;
1113 // Station for the end segment
1114 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1115 // multiple scattering factor corresponding to one chamber
1116 mcsFactor = 0.0136 /
1117 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1118 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1119 // linear extrapolation to end station
a9e2aefa 1120 // number of candidates with 2 segments to 0
1121 nbCan2Seg = 0;
1122 // Loop over segments in the end station
1123 for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) {
1124 // pointer to segment
1125 endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]);
1126 // test compatibility between current segment and "extrapSegment"
04b5ea16 1127 // 4 because 4 quantities in chi2
e516b01d 1128 extrapSegment =
1129 BegSegment->CreateSegmentFromLinearExtrapToStation(endSegment->GetZ(), mcsFactor);
a9e2aefa 1130 if ((endSegment->
1131 NormalizedChi2WithSegment(extrapSegment,
1132 fMaxSigma2Distance)) <= 4.0) {
1133 // both segments compatible:
1134 // make track candidate from "begSegment" and "endSegment"
1135 if (fPrintLevel >= 2)
1136 cout << "TrackCandidate with Segment " << iEndSegment <<
1137 " in Station(0..) " << endStation << endl;
1138 // flag for both segments in one track:
1139 // to be done in track constructor ????
1140 BegSegment->SetInTrack(kTRUE);
1141 endSegment->SetInTrack(kTRUE);
1142 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1143 AliMUONTrack(BegSegment, endSegment, this);
1144 fNRecTracks++;
1145 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1146 // increment number of track candidates with 2 segments
1147 nbCan2Seg++;
1148 }
1149 } // for (iEndSegment = 0;...
1150 delete extrapSegment; // should not delete HitForRec's it points to !!!!
1151 return nbCan2Seg;
1152}
1153
1154 //__________________________________________________________________________
1155Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment)
1156{
1157 // To make track candidates with one segment and one point
1158 // in stations(1..) 4 and 5,
1159 // the segment being pointed to by "BegSegment".
1160 Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit;
e516b01d 1161 AliMUONHitForRec *extrapHitForRec= NULL;
1162 AliMUONHitForRec *hit;
a9e2aefa 1163 AliMUONTrack *recTrack;
1164 Double_t mcsFactor;
1165 if (fPrintLevel >= 1)
1166 cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl;
1167 // station for the end point
1168 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1169 // multiple scattering factor corresponding to one chamber
1170 mcsFactor = 0.0136 /
1171 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1172 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1173 // first and second chambers(0..) in the end station
1174 ch1 = 2 * endStation;
1175 ch2 = ch1 + 1;
1176 // number of candidates to 0
1177 nbCan1Seg1Hit = 0;
1178 // Loop over chambers of the end station
1179 for (ch = ch2; ch >= ch1; ch--) {
a9e2aefa 1180 // limits for the hit index in the loop
1181 iHitMin = fIndexOfFirstHitForRecPerChamber[ch];
1182 iHitMax = iHitMin + fNHitsForRecPerChamber[ch];
1183 // Loop over HitForRec's in the chamber
1184 for (iHit = iHitMin; iHit < iHitMax; iHit++) {
1185 // pointer to HitForRec
1186 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
1187 // test compatibility between current HitForRec and "extrapHitForRec"
04b5ea16 1188 // 2 because 2 quantities in chi2
e516b01d 1189 // linear extrapolation to chamber
1190 extrapHitForRec =
1191 BegSegment->CreateHitForRecFromLinearExtrapToChamber( hit->GetZ(), mcsFactor);
a9e2aefa 1192 if ((hit->
1193 NormalizedChi2WithHitForRec(extrapHitForRec,
1194 fMaxSigma2Distance)) <= 2.0) {
1195 // both HitForRec's compatible:
1196 // make track candidate from begSegment and current HitForRec
1197 if (fPrintLevel >= 2)
1198 cout << "TrackCandidate with HitForRec " << iHit <<
1199 " in Chamber(0..) " << ch << endl;
1200 // flag for beginning segments in one track:
1201 // to be done in track constructor ????
1202 BegSegment->SetInTrack(kTRUE);
1203 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1204 AliMUONTrack(BegSegment, hit, this);
1205 // the right place to eliminate "double counting" ???? how ????
1206 fNRecTracks++;
1207 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1208 // increment number of track candidates
1209 nbCan1Seg1Hit++;
1210 }
1211 } // for (iHit = iHitMin;...
1212 delete extrapHitForRec;
1213 } // for (ch = ch2;...
1214 return nbCan1Seg1Hit;
1215}
1216
1217 //__________________________________________________________________________
1218void AliMUONEventReconstructor::MakeTrackCandidates(void)
1219{
1220 // To make track candidates
1221 // with at least 3 aligned points in stations(1..) 4 and 5
1222 // (two Segment's or one Segment and one HitForRec)
1223 Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg;
1224 AliMUONSegment *begSegment;
1225 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl;
1226 // Loop over stations(1..) 5 and 4 for the beginning segment
1227 for (begStation = 4; begStation > 2; begStation--) {
1228 // Loop over segments in the beginning station
1229 for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) {
1230 // pointer to segment
1231 begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]);
1232 if (fPrintLevel >= 2)
1233 cout << "look for TrackCandidate's with Segment " << iBegSegment <<
1234 " in Station(0..) " << begStation << endl;
1235 // Look for track candidates with two segments,
1236 // "begSegment" and all compatible segments in other station.
1237 // Only for beginning station(1..) 5
1238 // because candidates with 2 segments have to looked for only once.
1239 if (begStation == 4)
1240 nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment);
956019b6 1241 // Look for track candidates with one segment and one point,
a9e2aefa 1242 // "begSegment" and all compatible HitForRec's in other station.
1243 // Only if "begSegment" does not belong already to a track candidate.
1244 // Is that a too strong condition ????
1245 if (!(begSegment->GetInTrack()))
1246 nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment);
1247 } // for (iBegSegment = 0;...
1248 } // for (begStation = 4;...
1249 return;
1250}
1251
1252 //__________________________________________________________________________
1253void AliMUONEventReconstructor::FollowTracks(void)
1254{
1255 // Follow tracks in stations(1..) 3, 2 and 1
04b5ea16 1256 // too long: should be made more modular !!!!
e516b01d 1257 AliMUONHitForRec *bestHit, *extrapHit, *hit;
1258 AliMUONSegment *bestSegment, *extrapSegment, *segment;
04b5ea16 1259 AliMUONTrack *track, *nextTrack;
1260 AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex;
ecfa008b 1261 // -1 to avoid compilation warnings
1262 Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex;
04b5ea16 1263 Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor;
d0bfce8d 1264 Double_t bendingMomentum, chi2Norm = 0.;
9cbdf048 1265 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
04b5ea16 1266 // local maxSigma2Distance, for easy increase in testing
1267 maxSigma2Distance = fMaxSigma2Distance;
a9e2aefa 1268 if (fPrintLevel >= 2)
1269 cout << "enter FollowTracks" << endl;
1270 // Loop over track candidates
04b5ea16 1271 track = (AliMUONTrack*) fRecTracksPtr->First();
1272 trackIndex = -1;
1273 while (track) {
1274 // Follow function for each track candidate ????
1275 trackIndex++;
1276 nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track
a9e2aefa 1277 if (fPrintLevel >= 2)
1278 cout << "FollowTracks: track candidate(0..): " << trackIndex << endl;
956019b6 1279 // Fit track candidate
1280 track->SetFitMCS(0); // without multiple Coulomb scattering
1281 track->SetFitNParam(3); // with 3 parameters (X = Y = 0)
1282 track->SetFitStart(0); // from parameters at vertex
1283 track->Fit();
a9e2aefa 1284 if (fPrintLevel >= 10) {
1285 cout << "FollowTracks: track candidate(0..): " << trackIndex
956019b6 1286 << " after fit in stations(0..) 3 and 4" << endl;
a9e2aefa 1287 track->RecursiveDump();
1288 }
1289 // Loop over stations(1..) 3, 2 and 1
04b5ea16 1290 // something SPECIAL for stations 2 and 1 for majority 3 coincidence ????
1291 // otherwise: majority coincidence 2 !!!!
a9e2aefa 1292 for (station = 2; station >= 0; station--) {
1293 // Track parameters at first track hit (smallest Z)
1294 trackParam1 = ((AliMUONTrackHit*)
1295 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1296 // extrapolation to station
1297 trackParam1->ExtrapToStation(station, trackParam);
79e1e601 1298 extrapSegment = new AliMUONSegment(); // empty segment
a9e2aefa 1299 // multiple scattering factor corresponding to one chamber
1300 // and momentum in bending plane (not total)
1301 mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum();
1302 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1303 // Z difference from previous station
9cbdf048 1304 dZ1 = (&(pMUON->Chamber(2 * station)))->Z() -
1305 (&(pMUON->Chamber(2 * station + 2)))->Z();
a9e2aefa 1306 // Z difference between the two previous stations
9cbdf048 1307 dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() -
1308 (&(pMUON->Chamber(2 * station + 4)))->Z();
04b5ea16 1309 // Z difference between the two chambers in the previous station
1310 dZ3 = (&(pMUON->Chamber(2 * station)))->Z() -
1311 (&(pMUON->Chamber(2 * station + 1)))->Z();
1312 extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1313 extrapSegment->
1314 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1315 extrapSegment->UpdateFromStationTrackParam
1316 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1317 trackParam1->GetInverseBendingMomentum());
a9e2aefa 1318 bestChi2 = 5.0;
1319 bestSegment = NULL;
1320 if (fPrintLevel >= 10) {
1321 cout << "FollowTracks: track candidate(0..): " << trackIndex
1322 << " Look for segment in station(0..): " << station << endl;
1323 }
1324 // Loop over segments in station
1325 for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) {
1326 // Look for best compatible Segment in station
1327 // should consider all possibilities ????
1328 // multiple scattering ????
1329 // separation in 2 functions: Segment and HitForRec ????
1330 segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]);
d0bfce8d 1331 // correction of corrected segment (fBendingCoor and fNonBendingCoor)
1332 // according to real Z value of "segment" and slopes of "extrapSegment"
e516b01d 1333 (&(trackParam[0]))->ExtrapToZ(segment->GetZ());
1334 (&(trackParam[1]))->ExtrapToZ(segment->GetZ());
1335 extrapSegment->SetBendingCoor((&(trackParam[0]))->GetBendingCoor());
1336 extrapSegment->SetNonBendingCoor((&(trackParam[0]))->GetNonBendingCoor());
1337 extrapSegment->SetBendingSlope((&(trackParam[0]))->GetBendingSlope());
1338 extrapSegment->SetNonBendingSlope((&(trackParam[0]))->GetNonBendingSlope());
d0bfce8d 1339 chi2 = segment->
e516b01d 1340 NormalizedChi2WithSegment(extrapSegment, maxSigma2Distance);
a9e2aefa 1341 if (chi2 < bestChi2) {
1342 // update best Chi2 and Segment if better found
1343 bestSegment = segment;
1344 bestChi2 = chi2;
1345 }
1346 }
1347 if (bestSegment) {
1348 // best segment found: add it to track candidate
e516b01d 1349 (&(trackParam[0]))->ExtrapToZ(bestSegment->GetZ());
1350 (&(trackParam[1]))->ExtrapToZ(bestSegment->GetZ());
a9e2aefa 1351 track->AddSegment(bestSegment);
1352 // set track parameters at these two TrakHit's
1353 track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0]));
1354 track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1]));
1355 if (fPrintLevel >= 10) {
1356 cout << "FollowTracks: track candidate(0..): " << trackIndex
1357 << " Added segment in station(0..): " << station << endl;
1358 track->RecursiveDump();
1359 }
1360 }
1361 else {
1362 // No best segment found:
1363 // Look for best compatible HitForRec in station:
1364 // should consider all possibilities ????
1365 // multiple scattering ???? do about like for extrapSegment !!!!
79e1e601 1366 extrapHit = new AliMUONHitForRec(); // empty hit
a9e2aefa 1367 bestChi2 = 3.0;
1368 bestHit = NULL;
1369 if (fPrintLevel >= 10) {
1370 cout << "FollowTracks: track candidate(0..): " << trackIndex
1371 << " Segment not found, look for hit in station(0..): " << station
1372 << endl;
1373 }
1374 // Loop over chambers of the station
d82671a0 1375 for (chInStation = 0; chInStation < 2; chInStation++) {
956019b6 1376 ch = 2 * station + chInStation;
a9e2aefa 1377 for (iHit = fIndexOfFirstHitForRecPerChamber[ch];
1378 iHit < fIndexOfFirstHitForRecPerChamber[ch] +
1379 fNHitsForRecPerChamber[ch];
1380 iHit++) {
1381 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
e516b01d 1382 // coordinates of extrapolated hit
1383 (&(trackParam[chInStation]))->ExtrapToZ(hit->GetZ());
1384 extrapHit->
1385 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1386 extrapHit->
1387 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
1388 // resolutions from "extrapSegment"
1389 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1390 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
1391 // Loop over hits in the chamber
a9e2aefa 1392 // condition for hit not already in segment ????
1393 chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance);
1394 if (chi2 < bestChi2) {
1395 // update best Chi2 and HitForRec if better found
1396 bestHit = hit;
1397 bestChi2 = chi2;
d82671a0 1398 chBestHit = chInStation;
a9e2aefa 1399 }
1400 }
1401 }
1402 if (bestHit) {
1403 // best hit found: add it to track candidate
e516b01d 1404 (&(trackParam[chBestHit]))->ExtrapToZ(bestHit->GetZ());
a9e2aefa 1405 track->AddHitForRec(bestHit);
956019b6 1406 // set track parameters at this TrackHit
a9e2aefa 1407 track->SetTrackParamAtHit(track->GetNTrackHits() - 1,
1408 &(trackParam[chBestHit]));
1409 if (fPrintLevel >= 10) {
1410 cout << "FollowTracks: track candidate(0..): " << trackIndex
1411 << " Added hit in station(0..): " << station << endl;
1412 track->RecursiveDump();
1413 }
1414 }
1415 else {
8429a5e4 1416 // Remove current track candidate
1417 // and corresponding TrackHit's, ...
1418 track->Remove();
04b5ea16 1419 delete extrapSegment;
d0bfce8d 1420 delete extrapHit;
a9e2aefa 1421 break; // stop the search for this candidate:
1422 // exit from the loop over station
1423 }
d0bfce8d 1424 delete extrapHit;
a9e2aefa 1425 }
04b5ea16 1426 delete extrapSegment;
a9e2aefa 1427 // Sort track hits according to increasing Z
1428 track->GetTrackHitsPtr()->Sort();
1429 // Update track parameters at first track hit (smallest Z)
1430 trackParam1 = ((AliMUONTrackHit*)
1431 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
d0bfce8d 1432 bendingMomentum = 0.;
1433 if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.)
1434 bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum()));
1435 // Track removed if bendingMomentum not in window [min, max]
1436 if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) {
1437 track->Remove();
1438 break; // stop the search for this candidate:
1439 // exit from the loop over station
1440 }
956019b6 1441 // Track fit
04b5ea16 1442 // with multiple Coulomb scattering if all stations
1443 if (station == 0) track->SetFitMCS(1);
956019b6 1444 // without multiple Coulomb scattering if not all stations
04b5ea16 1445 else track->SetFitMCS(0);
956019b6 1446 track->SetFitNParam(5); // with 5 parameters (momentum and position)
1447 track->SetFitStart(1); // from parameters at first hit
1448 track->Fit();
d0bfce8d 1449 Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5);
1450 if (numberOfDegFree > 0) {
1451 chi2Norm = track->GetFitFMin() / numberOfDegFree;
1452 } else {
1453 chi2Norm = 1.e10;
1454 }
1455 // Track removed if normalized chi2 too high
1456 if (chi2Norm > fMaxChi2) {
1457 track->Remove();
1458 break; // stop the search for this candidate:
1459 // exit from the loop over station
1460 }
a9e2aefa 1461 if (fPrintLevel >= 10) {
1462 cout << "FollowTracks: track candidate(0..): " << trackIndex
1463 << " after fit from station(0..): " << station << " to 4" << endl;
1464 track->RecursiveDump();
1465 }
04b5ea16 1466 // Track extrapolation to the vertex through the absorber (Branson)
956019b6 1467 // after going through the first station
04b5ea16 1468 if (station == 0) {
1469 trackParamVertex = *trackParam1;
889a0215 1470 (&trackParamVertex)->ExtrapToVertex(0.,0.,0.);
04b5ea16 1471 track->SetTrackParamAtVertex(&trackParamVertex);
6ae236ee 1472 if (fPrintLevel >= 1) {
1473 cout << "FollowTracks: track candidate(0..): " << trackIndex
1474 << " after extrapolation to vertex" << endl;
1475 track->RecursiveDump();
1476 }
04b5ea16 1477 }
a9e2aefa 1478 } // for (station = 2;...
04b5ea16 1479 // go really to next track
1480 track = nextTrack;
1481 } // while (track)
1482 // Compression of track array (necessary after Remove ????)
1483 fRecTracksPtr->Compress();
1484 return;
1485}
1486
1487 //__________________________________________________________________________
8429a5e4 1488void AliMUONEventReconstructor::RemoveDoubleTracks(void)
1489{
1490 // To remove double tracks.
1491 // Tracks are considered identical
1492 // if they have at least half of their hits in common.
1493 // Among two identical tracks, one keeps the track with the larger number of hits
1494 // or, if these numbers are equal, the track with the minimum Chi2.
1495 AliMUONTrack *track1, *track2, *trackToRemove;
1496 Bool_t identicalTracks;
1497 Int_t hitsInCommon, nHits1, nHits2;
1498 identicalTracks = kTRUE;
1499 while (identicalTracks) {
1500 identicalTracks = kFALSE;
1501 // Loop over first track of the pair
1502 track1 = (AliMUONTrack*) fRecTracksPtr->First();
1503 while (track1 && (!identicalTracks)) {
1504 nHits1 = track1->GetNTrackHits();
1505 // Loop over second track of the pair
1506 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1507 while (track2 && (!identicalTracks)) {
1508 nHits2 = track2->GetNTrackHits();
1509 // number of hits in common between two tracks
1510 hitsInCommon = track1->HitsInCommon(track2);
1511 // check for identical tracks
1512 if ((4 * hitsInCommon) >= (nHits1 + nHits2)) {
1513 identicalTracks = kTRUE;
1514 // decide which track to remove
1515 if (nHits1 > nHits2) trackToRemove = track2;
1516 else if (nHits1 < nHits2) trackToRemove = track1;
1517 else if ((track1->GetFitFMin()) < (track2->GetFitFMin()))
1518 trackToRemove = track2;
1519 else trackToRemove = track1;
1520 // remove it
1521 trackToRemove->Remove();
1522 }
1523 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
1524 } // track2
1525 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1526 } // track1
1527 }
1528 return;
1529}
1530
d837040f 1531 //__________________________________________________________________________
1532void AliMUONEventReconstructor::UpdateTrackParamAtHit()
1533{
1534 // Set track parameters after track fitting. Fill fTrackParamAtHit of AliMUONTrack's
1535 AliMUONTrack *track;
1536 AliMUONTrackHit *trackHit;
1537 AliMUONTrackParam *trackParam;
1538 track = (AliMUONTrack*) fRecTracksPtr->First();
1539 while (track) {
1540 trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First();
1541 while (trackHit) {
1542 trackParam = trackHit->GetTrackParam();
1543 track->AddTrackParamAtHit(trackParam);
1544 trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit);
1545 } // trackHit
1546 track = (AliMUONTrack*) fRecTracksPtr->After(track);
1547 } // track
1548 return;
1549}
1550
b8dc484b 1551 //__________________________________________________________________________
1552void AliMUONEventReconstructor::UpdateHitForRecAtHit()
1553{
1554 // Set cluster parameterss after track fitting. Fill fHitForRecAtHit of AliMUONTrack's
1555 AliMUONTrack *track;
1556 AliMUONTrackHit *trackHit;
1557 AliMUONHitForRec *hitForRec;
1558 track = (AliMUONTrack*) fRecTracksPtr->First();
1559 while (track) {
1560 trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First();
1561 while (trackHit) {
1562 hitForRec = trackHit->GetHitForRecPtr();
1563 track->AddHitForRecAtHit(hitForRec);
1564 trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit);
1565 } // trackHit
1566 track = (AliMUONTrack*) fRecTracksPtr->After(track);
1567 } // track
1568 return;
1569}
1570
8429a5e4 1571 //__________________________________________________________________________
04b5ea16 1572void AliMUONEventReconstructor::EventDump(void)
1573{
1574 // Dump reconstructed event (track parameters at vertex and at first hit),
1575 // and the particle parameters
1576
1577 AliMUONTrack *track;
1578 AliMUONTrackParam *trackParam, *trackParam1;
04b5ea16 1579 Double_t bendingSlope, nonBendingSlope, pYZ;
1580 Double_t pX, pY, pZ, x, y, z, c;
1581 Int_t np, trackIndex, nTrackHits;
1582
1583 if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl;
1584 if (fPrintLevel >= 1) {
1585 cout << " Number of Reconstructed tracks :" << fNRecTracks << endl;
1586 }
1587 fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole
1588 // Loop over reconstructed tracks
1589 for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) {
83dbc640 1590 if (fTrackMethod != 1) continue; //AZ - skip the rest for now
04b5ea16 1591 if (fPrintLevel >= 1)
1592 cout << " track number: " << trackIndex << endl;
1593 // function for each track for modularity ????
1594 track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]);
1595 nTrackHits = track->GetNTrackHits();
1596 if (fPrintLevel >= 1)
1597 cout << " number of track hits: " << nTrackHits << endl;
1598 // track parameters at Vertex
1599 trackParam = track->GetTrackParamAtVertex();
1600 x = trackParam->GetNonBendingCoor();
1601 y = trackParam->GetBendingCoor();
1602 z = trackParam->GetZ();
1603 bendingSlope = trackParam->GetBendingSlope();
1604 nonBendingSlope = trackParam->GetNonBendingSlope();
1605 pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
1606 pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope);
1607 pX = pZ * nonBendingSlope;
1608 pY = pZ * bendingSlope;
1609 c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum());
1610 if (fPrintLevel >= 1)
1611 printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1612 z, x, y, pX, pY, pZ, c);
1613
1614 // track parameters at first hit
1615 trackParam1 = ((AliMUONTrackHit*)
1616 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1617 x = trackParam1->GetNonBendingCoor();
1618 y = trackParam1->GetBendingCoor();
1619 z = trackParam1->GetZ();
1620 bendingSlope = trackParam1->GetBendingSlope();
1621 nonBendingSlope = trackParam1->GetNonBendingSlope();
1622 pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum());
1623 pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope);
1624 pX = pZ * nonBendingSlope;
1625 pY = pZ * bendingSlope;
1626 c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum());
1627 if (fPrintLevel >= 1)
1628 printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1629 z, x, y, pX, pY, pZ, c);
1630 }
1631 // informations about generated particles
5d12ce38 1632 np = gAlice->GetMCApp()->GetNtrack();
04b5ea16 1633 printf(" **** number of generated particles: %d \n", np);
1634
88cb7938 1635// for (Int_t iPart = 0; iPart < np; iPart++) {
1636// p = gAlice->Particle(iPart);
1637// printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n",
1638// iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode());
1639// }
a9e2aefa 1640 return;
1641}
1642
276c44b7 1643
1644//__________________________________________________________________________
1645void AliMUONEventReconstructor::EventDumpTrigger(void)
1646{
1647 // Dump reconstructed trigger event
1648 // and the particle parameters
1649
52c9bc11 1650 AliMUONTriggerTrack *triggertrack ;
1651 Int_t nTriggerTracks = fMUONData->RecTriggerTracks()->GetEntriesFast();
276c44b7 1652
276c44b7 1653 if (fPrintLevel >= 1) {
52c9bc11 1654 cout << "****** enter EventDumpTrigger ******" << endl;
1655 cout << " Number of Reconstructed tracks :" << nTriggerTracks << endl;
276c44b7 1656 }
1657 // Loop over reconstructed tracks
52c9bc11 1658 for (Int_t trackIndex = 0; trackIndex < nTriggerTracks; trackIndex++) {
1659 triggertrack = (AliMUONTriggerTrack*)fMUONData->RecTriggerTracks()->At(trackIndex);
276c44b7 1660 printf(" trigger track number %i x11=%f y11=%f thetax=%f thetay=%f \n",
1661 trackIndex,
1662 triggertrack->GetX11(),triggertrack->GetY11(),
1663 triggertrack->GetThetax(),triggertrack->GetThetay());
1664 }
1665}
1666
1667//__________________________________________________________________________
c7ba256d 1668void AliMUONEventReconstructor::FillEvent()
1669{
1670// Create a new AliMUONRecoEvent, fill its track list, then add it as a
1671// leaf in the Event branch of TreeRecoEvent tree
1672 cout << "Enter FillEvent() ...\n";
1673
1674 if (!fRecoEvent) {
1675 fRecoEvent = new AliMUONRecoEvent();
1676 } else {
1677 fRecoEvent->Clear();
1678 }
1679 //save current directory
1680 TDirectory *current = gDirectory;
1681 if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE");
1682 if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events");
83dbc640 1683 //AZif (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) {
1684 if (fRecoEvent->MakeDumpTracks(fMuons, fRecTracksPtr, this)) { //AZ
c7ba256d 1685 if (fPrintLevel > 1) fRecoEvent->EventInfo();
1686 TBranch *branch = fEventTree->GetBranch("Event");
d0f40f23 1687 if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000);
c7ba256d 1688 branch->SetAutoDelete();
1689 fTreeFile->cd();
1690 fEventTree->Fill();
1691 fTreeFile->Write();
1692 }
1693 // restore directory
1694 current->cd();
1695}
83dbc640 1696
1697//__________________________________________________________________________
1698void AliMUONEventReconstructor::MakeTrackCandidatesK(void)
1699{
1700 // To make initial tracks for Kalman filter from the list of segments
1701 Int_t istat, iseg;
1702 AliMUONSegment *segment;
1703 AliMUONTrackK *trackK;
1704
1705 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesK" << endl;
1706 // Reset the TClonesArray of reconstructed tracks
1707 if (fRecTracksPtr) fRecTracksPtr->Delete();
1708 // Delete in order that the Track destructors are called,
1709 // hence the space for the TClonesArray of pointers to TrackHit's is freed
1710 fNRecTracks = 0;
1711
1712 AliMUONTrackK a(this, fHitsForRecPtr); // bad idea ???
1713 // Loop over stations(1...) 5 and 4
1714 for (istat=4; istat>=3; istat--) {
1715 // Loop over segments in the station
1716 for (iseg=0; iseg<fNSegments[istat]; iseg++) {
1717 // Transform segments to tracks and evaluate covariance matrix
1718 segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]);
1719 trackK = new ((*fRecTracksPtr)[fNRecTracks]) AliMUONTrackK(segment);
1720 fNRecTracks++;
1721 } // for (iseg=0;...)
1722 } // for (istat=4;...)
1723 return;
1724}
1725
1726//__________________________________________________________________________
1727void AliMUONEventReconstructor::FollowTracksK(void)
1728{
1729 // Follow tracks using Kalman filter
30178c30 1730 Bool_t ok;
83dbc640 1731 Int_t icand, ichamBeg, ichamEnd, chamBits;
1732 Double_t zDipole1, zDipole2;
1733 AliMUONTrackK *trackK;
1734 AliMUONHitForRec *hit;
1735 AliMUONRawCluster *clus;
1736 TClonesArray *rawclusters;
1737 AliMUON *pMUON;
1738 clus = 0; rawclusters = 0;
1739
1740 zDipole1 = GetSimpleBPosition() - GetSimpleBLength()/2;
1741 zDipole2 = zDipole1 + GetSimpleBLength();
1742
1743 // Print hits
1744 pMUON = (AliMUON*) gAlice->GetModule("MUON");
1745 for (Int_t i1=0; i1<fNHitsForRec; i1++) {
1746 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]);
1747 //if (hit->GetTHTrack() > 1 || hit->GetGeantSignal() == 0) continue;
1748 /*
1749 cout << " Hit #" << hit->GetChamberNumber() << " ";
1750 cout << hit->GetBendingCoor() << " ";
1751 cout << hit->GetNonBendingCoor() << " ";
1752 cout << hit->GetZ() << " ";
1753 cout << hit->GetGeantSignal() << " ";
1754 cout << hit->GetTHTrack() << endl;
1755 */
1756 /*
1757 printf(" Hit # %d %10.4f %10.4f %10.4f",
1758 hit->GetChamberNumber(), hit->GetBendingCoor(),
1759 hit->GetNonBendingCoor(), hit->GetZ());
1760 if (fRecGeantHits) {
1761 // from GEANT hits
1762 printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack());
1763 } else {
1764 // from raw clusters
1765 rawclusters = pMUON->RawClustAddress(hit->GetChamberNumber());
1766 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->
1767 GetHitNumber());
1768 printf("%3d", clus->fTracks[1]-1);
1769 if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1);
1770 else printf("\n");
1771 }
1772 */
1773 }
1774
1775 icand = -1;
1776 Int_t nSeeds = fNRecTracks; // starting number of seeds
1777 // Loop over track candidates
1778 while (icand < fNRecTracks-1) {
1779 icand ++;
1780 trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]);
1781
1782 // Discard candidate which will produce the double track
1783 if (icand > 0) {
30178c30 1784 ok = CheckCandidateK(icand,nSeeds);
1785 if (!ok) {
83dbc640 1786 //trackK->SetRecover(-1); // mark candidate to be removed
1787 //continue;
1788 }
1789 }
1790
30178c30 1791 ok = kTRUE;
83dbc640 1792 if (trackK->GetRecover() == 0) hit = (AliMUONHitForRec*)
1793 trackK->GetHitOnTrack()->Last(); // last hit
1794 else hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[1]; // 2'nd hit
1795 ichamBeg = hit->GetChamberNumber();
1796 ichamEnd = 0;
1797 // Check propagation direction
1798 if (trackK->GetTrackDir() > 0) {
1799 ichamEnd = 9; // forward propagation
30178c30 1800 ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2);
1801 if (ok) {
83dbc640 1802 ichamBeg = ichamEnd;
1803 ichamEnd = 6; // backward propagation
1804 // Change weight matrix and zero fChi2 for backpropagation
1805 trackK->StartBack();
30178c30 1806 ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2);
83dbc640 1807 ichamBeg = ichamEnd;
1808 ichamEnd = 0;
1809 }
1810 } else {
1811 if (trackK->GetBPFlag()) {
1812 // backpropagation
1813 ichamEnd = 6; // backward propagation
1814 // Change weight matrix and zero fChi2 for backpropagation
1815 trackK->StartBack();
30178c30 1816 ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2);
83dbc640 1817 ichamBeg = ichamEnd;
1818 ichamEnd = 0;
1819 }
1820 }
1821
30178c30 1822 if (ok) {
83dbc640 1823 trackK->SetTrackDir(-1);
1824 trackK->SetBPFlag(kFALSE);
30178c30 1825 ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2);
83dbc640 1826 }
30178c30 1827 if (ok) trackK->SetTrackQuality(0); // compute "track quality"
83dbc640 1828 else trackK->SetRecover(-1); // mark candidate to be removed
1829
1830 // Majority 3 of 4 in first 2 stations
1831 chamBits = 0;
1832 for (Int_t i=0; i<trackK->GetNTrackHits(); i++) {
1833 hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[i];
1834 chamBits |= BIT(hit->GetChamberNumber()-1);
1835 }
1836 //if (!((chamBits&3)==3 || (chamBits>>2&3)==3)) trackK->SetRecover(-1);
1837 //mark candidate to be removed
1838 } // while
1839
1840 for (Int_t i=0; i<fNRecTracks; i++) {
1841 trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]);
1842 if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i);
1843 }
1844
1845 // Compress TClonesArray
1846 fRecTracksPtr->Compress();
1847 fNRecTracks = fRecTracksPtr->GetEntriesFast();
1848 return;
1849}
1850
1851//__________________________________________________________________________
30178c30 1852Bool_t AliMUONEventReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds) const
83dbc640 1853{
1854 // Discards track candidate if it will produce the double track (having
1855 // the same seed segment hits as hits of a good track found before)
1856 AliMUONTrackK *track1, *track2;
1857 AliMUONHitForRec *hit1, *hit2, *hit;
1858
1859 track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]);
1860 hit1 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[0]; // 1'st hit
1861 hit2 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[1]; // 2'nd hit
1862
1863 for (Int_t i=0; i<icand; i++) {
1864 track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]);
1865 //if (track2->GetRecover() < 0) continue;
1866 if (track2->GetRecover() < 0 && icand >= nSeeds) continue;
1867
1868 if (track1->GetStartSegment() == track2->GetStartSegment()) {
1869 return kFALSE;
1870 } else {
1871 Int_t nSame = 0;
1872 for (Int_t j=0; j<track2->GetNTrackHits(); j++) {
1873 hit = (AliMUONHitForRec*) (*track2->GetHitOnTrack())[j];
1874 if (hit == hit1 || hit == hit2) {
1875 nSame++;
1876 if (nSame == 2) return kFALSE;
1877 }
1878 } // for (Int_t j=0;
1879 }
1880 } // for (Int_t i=0;
1881 return kTRUE;
1882}
1883
1884//__________________________________________________________________________
1885void AliMUONEventReconstructor::RemoveDoubleTracksK(void)
1886{
1887 // Removes double tracks (sharing more than half of their hits). Keeps
1888 // the track with higher quality
1889 AliMUONTrackK *track1, *track2, *trackToKill;
1890
1891 // Sort tracks according to their quality
1892 fRecTracksPtr->Sort();
1893
1894 // Loop over first track of the pair
1895 track1 = (AliMUONTrackK*) fRecTracksPtr->First();
1896 while (track1) {
1897 // Loop over second track of the pair
1898 track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1);
1899 while (track2) {
1900 // Check whether or not to keep track2
1901 if (!track2->KeepTrack(track1)) {
1902 cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) <<
1903 " " << track2->GetTrackQuality() << endl;
1904 trackToKill = track2;
1905 track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2);
1906 trackToKill->Kill();
1907 fRecTracksPtr->Compress();
1908 } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2);
1909 } // track2
1910 track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1);
1911 } // track1
1912
1913 fNRecTracks = fRecTracksPtr->GetEntriesFast();
1914 cout << " Number of Kalman tracks: " << fNRecTracks << endl;
1915}
1916
1917//__________________________________________________________________________
1918void AliMUONEventReconstructor::GoToVertex(void)
1919{
1920 // Propagates track to the vertex thru absorber
1921 // (using Branson correction for now)
1922
1923 Double_t zVertex;
1924 zVertex = 0;
1925 for (Int_t i=0; i<fNRecTracks; i++) {
1926 //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson();
1927 //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber
1928 ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2
1929 ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(); // with absorber
1930 }
1931}