git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Change of sign of curvature
[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
70479d0e 35#include <Riostream.h> // for cout
82a4bc7b 36#include <stdlib.h> // for exit()
a9e2aefa 37
94de3818 38#include <TTree.h>
a9e2aefa 39
a9e2aefa 40#include "AliMUON.h"
52c9bc11 41//#include "AliMUONChamber.h"
3831f268 42#include "AliMUONEventReconstructor.h"
a9e2aefa 43#include "AliMUONHitForRec.h"
276c44b7 44#include "AliMUONTriggerTrack.h"
45//#include "AliMUONTriggerConstants.h"
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 "AliConfig.h"
57#include "AliRunLoader.h"
58#include "AliLoader.h"
83dbc640 59#include "AliMUONTrackK.h" //AZ
60#include <TMatrixD.h> //AZ
5d12ce38 61#include "AliMC.h"
a9e2aefa 62
a9e2aefa 63//************* Defaults parameters for reconstruction
9cbdf048 64static const Double_t kDefaultMinBendingMomentum = 3.0;
d0bfce8d 65static const Double_t kDefaultMaxBendingMomentum = 500.0;
66static const Double_t kDefaultMaxChi2 = 100.0;
9cbdf048 67static const Double_t kDefaultMaxSigma2Distance = 16.0;
68static const Double_t kDefaultBendingResolution = 0.01;
69static const Double_t kDefaultNonBendingResolution = 0.144;
70static const Double_t kDefaultChamberThicknessInX0 = 0.03;
a9e2aefa 71// Simple magnetic field:
72// Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG
73// Length and Position from reco_muon.F, with opposite sign:
74// Length = ZMAGEND-ZCOIL
75// Position = (ZMAGEND+ZCOIL)/2
76// to be ajusted differently from real magnetic field ????
9cbdf048 77static const Double_t kDefaultSimpleBValue = 7.0;
78static const Double_t kDefaultSimpleBLength = 428.0;
79static const Double_t kDefaultSimpleBPosition = 1019.0;
80static const Int_t kDefaultRecGeantHits = 0;
81static const Double_t kDefaultEfficiency = 0.95;
a9e2aefa 82
70b6e084 83static const Int_t kDefaultPrintLevel = -1;
a9e2aefa 84
85ClassImp(AliMUONEventReconstructor) // Class implementation in ROOT context
86
87 //__________________________________________________________________________
52c9bc11 88AliMUONEventReconstructor::AliMUONEventReconstructor(AliLoader* loader)
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 ????
9cbdf048 99 for (Int_t st = 0; st < kMaxMuonTrackingStations; 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 //__________________________________________________________________________
d9a3473d 158AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& Reconstructor):TObject(Reconstructor)
9cbdf048 159{
160 // Dummy copy constructor
161}
162
d9a3473d 163AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& /*Reconstructor*/)
9cbdf048 164{
165 // Dummy assignment operator
166 return *this;
167}
168
a9e2aefa 169 //__________________________________________________________________________
170AliMUONEventReconstructor::~AliMUONEventReconstructor(void)
171{
172 // Destructor for class AliMUONEventReconstructor
c7ba256d 173 if (fTreeFile) {
174 fTreeFile->Close();
175 delete fTreeFile;
176 }
177// if (fEventTree) delete fEventTree;
178 if (fRecoEvent) delete fRecoEvent;
a9e2aefa 179 delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ????
9cbdf048 180 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 181 delete fSegmentsPtr[st]; // Correct destruction of everything ????
182 return;
183}
184
185 //__________________________________________________________________________
186void AliMUONEventReconstructor::SetReconstructionParametersToDefaults(void)
187{
188 // Set reconstruction parameters to default values
189 // Would be much more convenient with a structure (or class) ????
9cbdf048 190 fMinBendingMomentum = kDefaultMinBendingMomentum;
d0bfce8d 191 fMaxBendingMomentum = kDefaultMaxBendingMomentum;
192 fMaxChi2 = kDefaultMaxChi2;
9cbdf048 193 fMaxSigma2Distance = kDefaultMaxSigma2Distance;
a9e2aefa 194
9cbdf048 195 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON");
a9e2aefa 196 // ******** Parameters for making HitsForRec
197 // minimum radius,
198 // like in TRACKF_STAT:
199 // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3;
200 // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9
9cbdf048 201 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
202 if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
a9e2aefa 203 2.0 * TMath::Pi() / 180.0;
204 else fRMin[ch] = 30.0;
d0bfce8d 205 // maximum radius at 10 degrees and Z of chamber
206 fRMax[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
207 10.0 * TMath::Pi() / 180.0;
a9e2aefa 208 }
a9e2aefa 209
210 // ******** Parameters for making segments
211 // should be parametrized ????
212 // according to interval between chambers in a station ????
213 // Maximum distance in non bending plane
214 // 5 * 0.22 just to remember the way it was made in TRACKF_STAT
215 // SIGCUT*DYMAX(IZ)
9cbdf048 216 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 217 fSegmentMaxDistNonBending[st] = 5. * 0.22;
860cef81 218 // Maximum distance in bending plane:
219 // values from TRACKF_STAT, corresponding to (J psi 20cm),
220 // scaled to the real distance between chambers in a station
ef21c79e 221 fSegmentMaxDistBending[0] = TMath::Abs( 1.5 *
222 ((&(pMUON->Chamber(1)))->Z() - (&(pMUON->Chamber(0)))->Z()) / 20.0);
223 fSegmentMaxDistBending[1] = TMath::Abs( 1.5 *
224 ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0);
225 fSegmentMaxDistBending[2] = TMath::Abs( 3.0 *
226 ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0);
227 fSegmentMaxDistBending[3] = TMath::Abs( 6.0 *
228 ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0);
229 fSegmentMaxDistBending[4] = TMath::Abs( 6.0 *
230 ((&(pMUON->Chamber(9)))->Z() - (&(pMUON->Chamber(8)))->Z()) / 20.0);
a9e2aefa 231
9cbdf048 232 fBendingResolution = kDefaultBendingResolution;
233 fNonBendingResolution = kDefaultNonBendingResolution;
234 fChamberThicknessInX0 = kDefaultChamberThicknessInX0;
235 fSimpleBValue = kDefaultSimpleBValue;
236 fSimpleBLength = kDefaultSimpleBLength;
237 fSimpleBPosition = kDefaultSimpleBPosition;
238 fRecGeantHits = kDefaultRecGeantHits;
239 fEfficiency = kDefaultEfficiency;
240 fPrintLevel = kDefaultPrintLevel;
a9e2aefa 241 return;
242}
243
244//__________________________________________________________________________
3831f268 245Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const
a9e2aefa 246{
247 // Returns impact parameter at vertex in bending plane (cm),
248 // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c),
249 // using simple values for dipole magnetic field.
065bd0e1 250 // The sign of "BendingMomentum" is the sign of the charge.
a9e2aefa 251 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
252 BendingMomentum);
253}
254
255//__________________________________________________________________________
3831f268 256Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const
a9e2aefa 257{
258 // Returns signed bending momentum in bending plane (GeV/c),
065bd0e1 259 // the sign being the sign of the charge for particles moving forward in Z,
a9e2aefa 260 // from the impact parameter "ImpactParam" at vertex in bending plane (cm),
261 // using simple values for dipole magnetic field.
a9e2aefa 262 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
263 ImpactParam);
264}
265
266//__________________________________________________________________________
267void AliMUONEventReconstructor::SetBkgGeantFile(Text_t *BkgGeantFileName)
268{
269 // Set background file ... for GEANT hits
270 // Must be called after having loaded the firts signal event
271 if (fPrintLevel >= 0) {
272 cout << "Enter SetBkgGeantFile with BkgGeantFileName ``"
273 << BkgGeantFileName << "''" << endl;}
274 if (strlen(BkgGeantFileName)) {
275 // BkgGeantFileName not empty: try to open the file
276 if (fPrintLevel >= 2) {cout << "Before File(Bkg)" << endl; gDirectory->Dump();}
277 fBkgGeantFile = new TFile(BkgGeantFileName);
278 if (fPrintLevel >= 2) {cout << "After File(Bkg)" << endl; gDirectory->Dump();}
279 if (fBkgGeantFile-> IsOpen()) {
280 if (fPrintLevel >= 0) {
281 cout << "Background for GEANT hits in file: ``" << BkgGeantFileName
282 << "'' successfully opened" << endl;}
283 }
284 else {
285 cout << "Background for GEANT hits in file: " << BkgGeantFileName << endl;
286 cout << "NOT FOUND: EXIT" << endl;
287 exit(0); // right instruction for exit ????
288 }
289 // Arrays for "particles" and "hits"
290 fBkgGeantParticles = new TClonesArray("TParticle", 200);
291 fBkgGeantHits = new TClonesArray("AliMUONHit", 2000);
292 // Event number to -1 for initialization
293 fBkgGeantEventNumber = -1;
294 // Back to the signal file:
295 // first signal event must have been loaded previously,
296 // otherwise, Segmentation violation at the next instruction
297 // How is it possible to do smething better ????
298 ((gAlice->TreeK())->GetCurrentFile())->cd();
299 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
300 }
301 return;
302}
303
304//__________________________________________________________________________
305void AliMUONEventReconstructor::NextBkgGeantEvent(void)
306{
307 // Get next event in background file for GEANT hits
308 // Goes back to event number 0 when end of file is reached
309 char treeName[20];
310 TBranch *branch;
311 if (fPrintLevel >= 0) {
312 cout << "Enter NextBkgGeantEvent" << endl;}
313 // Clean previous event
314 if(fBkgGeantTK) delete fBkgGeantTK;
315 fBkgGeantTK = NULL;
316 if(fBkgGeantParticles) fBkgGeantParticles->Clear();
317 if(fBkgGeantTH) delete fBkgGeantTH;
318 fBkgGeantTH = NULL;
319 if(fBkgGeantHits) fBkgGeantHits->Clear();
320 // Increment event number
321 fBkgGeantEventNumber++;
322 // Get access to Particles and Hits for event from background file
323 if (fPrintLevel >= 2) {cout << "Before cd(Bkg)" << endl; gDirectory->Dump();}
324 fBkgGeantFile->cd();
325 if (fPrintLevel >= 2) {cout << "After cd(Bkg)" << endl; gDirectory->Dump();}
326 // Particles: TreeK for event and branch "Particles"
327 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
328 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
329 if (!fBkgGeantTK) {
330 if (fPrintLevel >= 0) {
331 cout << "Cannot find Kine Tree for background event: " <<
332 fBkgGeantEventNumber << endl;
333 cout << "Goes back to event 0" << endl;
334 }
335 fBkgGeantEventNumber = 0;
336 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
337 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
338 if (!fBkgGeantTK) {
339 cout << "ERROR: cannot find Kine Tree for background event: " <<
340 fBkgGeantEventNumber << endl;
341 exit(0);
342 }
343 }
344 if (fBkgGeantTK)
345 fBkgGeantTK->SetBranchAddress("Particles", &fBkgGeantParticles);
346 fBkgGeantTK->GetEvent(0); // why event 0 ???? necessary ????
347 // Hits: TreeH for event and branch "MUON"
348 sprintf(treeName, "TreeH%d", fBkgGeantEventNumber);
349 fBkgGeantTH = (TTree*)gDirectory->Get(treeName);
350 if (!fBkgGeantTH) {
351 cout << "ERROR: cannot find Hits Tree for background event: " <<
352 fBkgGeantEventNumber << endl;
353 exit(0);
354 }
355 if (fBkgGeantTH && fBkgGeantHits) {
356 branch = fBkgGeantTH->GetBranch("MUON");
357 if (branch) branch->SetAddress(&fBkgGeantHits);
358 }
359 fBkgGeantTH->GetEntries(); // necessary ????
360 // Back to the signal file
361 ((gAlice->TreeK())->GetCurrentFile())->cd();
362 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
363 return;
364}
365
366//__________________________________________________________________________
367void AliMUONEventReconstructor::EventReconstruct(void)
368{
369 // To reconstruct one event
370 if (fPrintLevel >= 1) cout << "enter EventReconstruct" << endl;
371 MakeEventToBeReconstructed();
372 MakeSegments();
373 MakeTracks();
374 return;
375}
376
276c44b7 377//__________________________________________________________________________
378void AliMUONEventReconstructor::EventReconstructTrigger(void)
379{
380 // To reconstruct one event
381 if (fPrintLevel >= 1) cout << "enter EventReconstructTrigger" << endl;
382 MakeTriggerTracks();
383 return;
384}
385
a9e2aefa 386 //__________________________________________________________________________
387void AliMUONEventReconstructor::ResetHitsForRec(void)
388{
389 // To reset the array and the number of HitsForRec,
390 // and also the number of HitsForRec
391 // and the index of the first HitForRec per chamber
392 if (fHitsForRecPtr) fHitsForRecPtr->Clear();
393 fNHitsForRec = 0;
9cbdf048 394 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++)
a9e2aefa 395 fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0;
396 return;
397}
398
399 //__________________________________________________________________________
400void AliMUONEventReconstructor::ResetSegments(void)
401{
402 // To reset the TClonesArray of segments and the number of Segments
403 // for all stations
9cbdf048 404 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 405 if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear();
406 fNSegments[st] = 0;
407 }
408 return;
409}
410
411 //__________________________________________________________________________
412void AliMUONEventReconstructor::ResetTracks(void)
413{
414 // To reset the TClonesArray of reconstructed tracks
8429a5e4 415 if (fRecTracksPtr) fRecTracksPtr->Delete();
416 // Delete in order that the Track destructors are called,
417 // hence the space for the TClonesArray of pointers to TrackHit's is freed
a9e2aefa 418 fNRecTracks = 0;
419 return;
420}
421
276c44b7 422 //__________________________________________________________________________
423void AliMUONEventReconstructor::ResetTriggerTracks(void)
424{
425 // To reset the TClonesArray of reconstructed trigger tracks
426 if (fRecTriggerTracksPtr) fRecTriggerTracksPtr->Delete();
427 // Delete in order that the Track destructors are called,
428 // hence the space for the TClonesArray of pointers to TrackHit's is freed
429 fNRecTriggerTracks = 0;
430 return;
431}
432
8429a5e4 433 //__________________________________________________________________________
434void AliMUONEventReconstructor::ResetTrackHits(void)
435{
436 // To reset the TClonesArray of hits on reconstructed tracks
437 if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear();
438 fNRecTrackHits = 0;
439 return;
440}
441
a9e2aefa 442 //__________________________________________________________________________
443void AliMUONEventReconstructor::MakeEventToBeReconstructed(void)
444{
445 // To make the list of hits to be reconstructed,
446 // either from the GEANT hits or from the raw clusters
447 // according to the parameter set for the reconstructor
52c9bc11 448// TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly
88cb7938 449
52c9bc11 450// AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname);
451// if (rl == 0x0)
452// {
453// Error("MakeEventToBeReconstructed",
454// "Can not find Run Loader in Event Folder named %s.",
455// evfoldname.Data());
456// return;
457// }
458// AliLoader* gime = rl->GetLoader("MUONLoader");
459// if (gime == 0x0)
460// {
461// Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader.");
462// return;
463// }
88cb7938 464
a9e2aefa 465 if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl;
466 ResetHitsForRec();
467 if (fRecGeantHits == 1) {
468 // Reconstruction from GEANT hits
469 // Back to the signal file
52c9bc11 470 TTree* treeH = fLoader->TreeH();
88cb7938 471 if (treeH == 0x0)
472 {
52c9bc11 473 Int_t retval = fLoader->LoadHits();
88cb7938 474 if ( retval)
475 {
476 Error("MakeEventToBeReconstructed","Error occured while loading hits.");
477 return;
478 }
52c9bc11 479 treeH = fLoader->TreeH();
88cb7938 480 if (treeH == 0x0)
481 {
482 Error("MakeEventToBeReconstructed","Can not get TreeH");
483 return;
484 }
485 }
52c9bc11 486 fMUONData->SetTreeAddress("H");
487 AddHitsForRecFromGEANT(treeH);
88cb7938 488
a9e2aefa 489 // Background hits
490 AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits);
491 // Sort HitsForRec in increasing order with respect to chamber number
492 SortHitsForRecWithIncreasingChamber();
493 }
494 else {
495 // Reconstruction from raw clusters
496 // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
497 // Security on MUON ????
498 // TreeR assumed to be be "prepared" in calling function
499 // by "MUON->GetTreeR(nev)" ????
52c9bc11 500 TTree *treeR = fLoader->TreeR();
501 fMUONData->SetTreeAddress("RC");
9cbdf048 502 AddHitsForRecFromRawClusters(treeR);
a9e2aefa 503 // No sorting: it is done automatically in the previous function
504 }
505 if (fPrintLevel >= 10) {
506 cout << "end of MakeEventToBeReconstructed" << endl;
507 cout << "NHitsForRec: " << fNHitsForRec << endl;
9cbdf048 508 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 509 cout << "chamber(0...): " << ch
510 << " NHitsForRec: " << fNHitsForRecPerChamber[ch]
511 << " index(first HitForRec): " << fIndexOfFirstHitForRecPerChamber[ch]
512 << endl;
513 for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch];
514 hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch];
515 hit++) {
516 cout << "HitForRec index(0...): " << hit << endl;
517 ((*fHitsForRecPtr)[hit])->Dump();
518 }
519 }
520 }
521 return;
522}
523
524 //__________________________________________________________________________
525void AliMUONEventReconstructor::AddHitsForRecFromGEANT(TTree *TH)
526{
527 // To add to the list of hits for reconstruction
528 // the GEANT signal hits from a hit tree TH.
83dbc640 529 Int_t hitBits, chamBits; //AZ
a9e2aefa 530 if (fPrintLevel >= 2)
531 cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl;
532 if (TH == NULL) return;
52c9bc11 533 // AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
534 //AliMUONData * muondata = pMUON->GetMUONData();
a9e2aefa 535 // Security on MUON ????
536 // See whether it could be the same for signal and background ????
537 // Loop over tracks in tree
538 Int_t ntracks = (Int_t) TH->GetEntries();
539 if (fPrintLevel >= 2)
540 cout << "ntracks: " << ntracks << endl;
83dbc640 541 fMuons = 0; //AZ
a9e2aefa 542 for (Int_t track = 0; track < ntracks; track++) {
52c9bc11 543 fMUONData->ResetHits();
a9e2aefa 544 TH->GetEvent(track);
545 // Loop over hits
546 Int_t hit = 0;
83dbc640 547 hitBits = 0; // AZ
548 chamBits = 0; // AZ
549 Int_t itrack = track; //AZ
38302c61 550
551 Int_t ihit, nhits=0;
52c9bc11 552 nhits = (Int_t) fMUONData->Hits()->GetEntriesFast();
38302c61 553 AliMUONHit* mHit=0x0;
1391e633 554
38302c61 555 for(ihit=0; ihit<nhits; ihit++) {
52c9bc11 556 mHit = static_cast<AliMUONHit*>(fMUONData->Hits()->At(ihit));
38302c61 557 Int_t ipart = TMath::Abs ((Int_t) mHit->Particle()); //AZ
558 if (NewHitForRecFromGEANT(mHit,track, hit, 1) && ipart == 13
559 //if (NewHitForRecFromGEANT(mHit,itrack-1, hit, 1) && ipart == 13
1391e633 560 && itrack <= 2 && !BIT(mHit->Chamber()-1) ) chamBits |= BIT(mHit->Chamber()-1); //AZ - set bit
38302c61 561 }
1391e633 562
83dbc640 563 if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 &&
564 chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3))
565 fMuons += 1; //AZ
566 //if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 &&
567 // chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3) &&
568 // ((chamBits&3)==3 || (chamBits>>2&3)==3)) fMuons += 1;
a9e2aefa 569 } // end of track loop
570 return;
571}
572
573 //__________________________________________________________________________
574void AliMUONEventReconstructor::AddHitsForRecFromBkgGEANT(TTree *TH, TClonesArray *Hits)
575{
576 // To add to the list of hits for reconstruction
577 // the GEANT background hits from a hit tree TH and a pointer Hits to a hit list.
578 // How to have only one function "AddHitsForRecFromGEANT" ????
579 if (fPrintLevel >= 2)
580 cout << "enter AddHitsForRecFromBkgGEANT with TH: " << TH << endl;
581 if (TH == NULL) return;
582 // Loop over tracks in tree
583 Int_t ntracks = (Int_t) TH->GetEntries();
584 if (fPrintLevel >= 2)
585 cout << "ntracks: " << ntracks << endl;
586 for (Int_t track = 0; track < ntracks; track++) {
587 if (Hits) Hits->Clear();
588 TH->GetEvent(track);
589 // Loop over hits
590 for (Int_t hit = 0; hit < Hits->GetEntriesFast(); hit++) {
591 NewHitForRecFromGEANT((AliMUONHit*) (*Hits)[hit], track, hit, 0);
592 } // end of hit loop
593 } // end of track loop
594 return;
595}
596
597 //__________________________________________________________________________
598AliMUONHitForRec* AliMUONEventReconstructor::NewHitForRecFromGEANT(AliMUONHit* Hit, Int_t TrackNumber, Int_t HitNumber, Int_t Signal)
599{
600 // To make a new hit for reconstruction from a GEANT hit pointed to by "Hit",
601 // with hit number "HitNumber" in the track numbered "TrackNumber",
602 // either from signal ("Signal" = 1) or background ("Signal" = 0) event.
603 // Selects hits in tracking (not trigger) chambers.
604 // Takes into account the efficiency (fEfficiency)
605 // and the smearing from resolution (fBendingResolution and fNonBendingResolution).
606 // Adds a condition on the radius between RMin and RMax
607 // to better simulate the real chambers.
608 // Returns the pointer to the new hit for reconstruction,
609 // or NULL in case of inefficiency or non tracking chamber or bad radius.
610 // No condition on at most 20 cm from a muon from a resonance
611 // like in Fortran TRACKF_STAT.
612 AliMUONHitForRec* hitForRec;
613 Double_t bendCoor, nonBendCoor, radius;
0a5f36d9 614 Int_t chamber = Hit->Chamber() - 1; // chamber(0...)
a9e2aefa 615 // only in tracking chambers (fChamber starts at 1)
9cbdf048 616 if (chamber >= kMaxMuonTrackingChambers) return NULL;
a9e2aefa 617 // only if hit is efficient (keep track for checking ????)
618 if (gRandom->Rndm() > fEfficiency) return NULL;
619 // only if radius between RMin and RMax
94de3818 620 bendCoor = Hit->Y();
621 nonBendCoor = Hit->X();
a9e2aefa 622 radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor));
d0bfce8d 623 // This cut is not needed with a realistic chamber geometry !!!!
624// if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL;
a9e2aefa 625 // new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's
626 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit);
627 fNHitsForRec++;
628 // add smearing from resolution
629 hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution));
630 hitForRec->SetNonBendingCoor(nonBendCoor
631 + gRandom->Gaus(0., fNonBendingResolution));
d0bfce8d 632// // !!!! without smearing
633// hitForRec->SetBendingCoor(bendCoor);
634// hitForRec->SetNonBendingCoor(nonBendCoor);
a9e2aefa 635 // more information into HitForRec
636 // resolution: angular effect to be added here ????
637 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
638 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
639 // GEANT track info
640 hitForRec->SetHitNumber(HitNumber);
641 hitForRec->SetTHTrack(TrackNumber);
642 hitForRec->SetGeantSignal(Signal);
643 if (fPrintLevel >= 10) {
644 cout << "track: " << TrackNumber << " hit: " << HitNumber << endl;
645 Hit->Dump();
646 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
647 hitForRec->Dump();}
648 return hitForRec;
649}
650
651 //__________________________________________________________________________
652void AliMUONEventReconstructor::SortHitsForRecWithIncreasingChamber()
653{
654 // Sort HitsForRec's in increasing order with respect to chamber number.
655 // Uses the function "Compare".
656 // Update the information for HitsForRec per chamber too.
657 Int_t ch, nhits, prevch;
658 fHitsForRecPtr->Sort();
9cbdf048 659 for (ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 660 fNHitsForRecPerChamber[ch] = 0;
661 fIndexOfFirstHitForRecPerChamber[ch] = 0;
662 }
663 prevch = 0; // previous chamber
664 nhits = 0; // number of hits in current chamber
665 // Loop over HitsForRec
666 for (Int_t hit = 0; hit < fNHitsForRec; hit++) {
667 // chamber number (0...)
668 ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber();
669 // increment number of hits in current chamber
670 (fNHitsForRecPerChamber[ch])++;
671 // update index of first HitForRec in current chamber
672 // if chamber number different from previous one
673 if (ch != prevch) {
674 fIndexOfFirstHitForRecPerChamber[ch] = hit;
675 prevch = ch;
676 }
677 }
678 return;
679}
680
681// //__________________________________________________________________________
682// void AliMUONEventReconstructor::AddHitsForRecFromCathodeCorrelations(TTree* TC)
683// {
684// // OLD VERSION WHEN ONE ONE WAS USING SO CALLED CATHODE CORRELATIONS
685// // To add to the list of hits for reconstruction
686// // the (cathode correlated) raw clusters
687// // No condition added, like in Fortran TRACKF_STAT,
688// // on the radius between RMin and RMax.
689// AliMUONHitForRec *hitForRec;
690// if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromCathodeCorrelations" << endl;
691// AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
692// // Security on MUON ????
693// // Loop over tracking chambers
9cbdf048 694// for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 695// // number of HitsForRec to 0 for the chamber
696// fNHitsForRecPerChamber[ch] = 0;
697// // index of first HitForRec for the chamber
698// if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
699// else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
700// TClonesArray *reconst_hits = MUON->ReconstHitsAddress(ch);
701// MUON->ResetReconstHits();
702// TC->GetEvent();
703// Int_t ncor = (Int_t)reconst_hits->GetEntries();
704// // Loop over (cathode correlated) raw clusters
705// for (Int_t cor = 0; cor < ncor; cor++) {
706// AliMUONReconstHit * mCor =
707// (AliMUONReconstHit*) reconst_hits->UncheckedAt(cor);
708// // new AliMUONHitForRec from (cathode correlated) raw cluster
709// // and increment number of AliMUONHitForRec's (total and in chamber)
710// hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(mCor);
711// fNHitsForRec++;
712// (fNHitsForRecPerChamber[ch])++;
713// // more information into HitForRec
714// hitForRec->SetChamberNumber(ch);
715// hitForRec->SetHitNumber(cor);
716// // Z coordinate of the chamber (cm) with sign opposite to GEANT sign
717// // could (should) be more exact from chamber geometry ????
718// hitForRec->SetZ(-(&(MUON->Chamber(ch)))->Z());
719// if (fPrintLevel >= 10) {
720// cout << "chamber (0...): " << ch <<
721// " cathcorrel (0...): " << cor << endl;
722// mCor->Dump();
723// cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
724// hitForRec->Dump();}
725// } // end of cluster loop
726// } // end of chamber loop
727// return;
728// }
729
730 //__________________________________________________________________________
731void AliMUONEventReconstructor::AddHitsForRecFromRawClusters(TTree* TR)
732{
733 // To add to the list of hits for reconstruction all the raw clusters
734 // No condition added, like in Fortran TRACKF_STAT,
735 // on the radius between RMin and RMax.
736 AliMUONHitForRec *hitForRec;
737 AliMUONRawCluster *clus;
f69d51b5 738 Int_t iclus, nclus, nTRentries;
a9e2aefa 739 TClonesArray *rawclusters;
740 if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl;
88cb7938 741
52c9bc11 742// TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly
743// AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname);
744// if (rl == 0x0)
745// {
746// Error("MakeEventToBeReconstructed",
747// "Can not find Run Loader in Event Folder named %s.",
748// evfoldname.Data());
749// return;
750// }
751// AliLoader* gime = rl->GetLoader("MUONLoader");
752// if (gime == 0x0)
753// {
754// Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader.");
755// return;
756// }
757// // Loading AliRun master
758// rl->LoadgAlice();
759// gAlice = rl->GetAliRun();
88cb7938 760
761 // Loading MUON subsystem
52c9bc11 762 // AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON");
88cb7938 763
f69d51b5 764 nTRentries = Int_t(TR->GetEntries());
765 if (nTRentries != 1) {
766 cout << "Error in AliMUONEventReconstructor::AddHitsForRecFromRawClusters"
767 << endl;
768 cout << "nTRentries = " << nTRentries << " not equal to 1" << endl;
769 exit(0);
770 }
52c9bc11 771 fLoader->TreeR()->GetEvent(0); // only one entry
772
a9e2aefa 773 // Loop over tracking chambers
9cbdf048 774 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 775 // number of HitsForRec to 0 for the chamber
776 fNHitsForRecPerChamber[ch] = 0;
777 // index of first HitForRec for the chamber
778 if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
779 else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
52c9bc11 780 rawclusters =fMUONData->RawClusters(ch);
f69d51b5 781// pMUON->ResetRawClusters();
782// TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ????
a9e2aefa 783 nclus = (Int_t) (rawclusters->GetEntries());
784 // Loop over (cathode correlated) raw clusters
785 for (iclus = 0; iclus < nclus; iclus++) {
786 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus);
787 // new AliMUONHitForRec from raw cluster
788 // and increment number of AliMUONHitForRec's (total and in chamber)
789 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus);
790 fNHitsForRec++;
791 (fNHitsForRecPerChamber[ch])++;
792 // more information into HitForRec
793 // resolution: info should be already in raw cluster and taken from it ????
794 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
795 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
796 // original raw cluster
797 hitForRec->SetChamberNumber(ch);
798 hitForRec->SetHitNumber(iclus);
ba5b68db 799 // Z coordinate of the raw cluster (cm)
cfe0107f 800 hitForRec->SetZ(clus->fZ[0]);
a9e2aefa 801 if (fPrintLevel >= 10) {
802 cout << "chamber (0...): " << ch <<
803 " raw cluster (0...): " << iclus << endl;
804 clus->Dump();
805 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
806 hitForRec->Dump();}
807 } // end of cluster loop
808 } // end of chamber loop
83dbc640 809 SortHitsForRecWithIncreasingChamber(); //AZ
a9e2aefa 810 return;
811}
812
813 //__________________________________________________________________________
814void AliMUONEventReconstructor::MakeSegments(void)
815{
816 // To make the list of segments in all stations,
817 // from the list of hits to be reconstructed
818 if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl;
819 ResetSegments();
820 // Loop over stations
83dbc640 821 Int_t nb = (fTrackMethod == 2) ? 3 : 0; //AZ
822 //AZ for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
823 for (Int_t st = nb; st < kMaxMuonTrackingStations; st++) //AZ
a9e2aefa 824 MakeSegmentsPerStation(st);
825 if (fPrintLevel >= 10) {
826 cout << "end of MakeSegments" << endl;
9cbdf048 827 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 828 cout << "station(0...): " << st
829 << " Segments: " << fNSegments[st]
830 << endl;
831 for (Int_t seg = 0;
832 seg < fNSegments[st];
833 seg++) {
834 cout << "Segment index(0...): " << seg << endl;
835 ((*fSegmentsPtr[st])[seg])->Dump();
836 }
837 }
838 }
839 return;
840}
841
842 //__________________________________________________________________________
843void AliMUONEventReconstructor::MakeSegmentsPerStation(Int_t Station)
844{
845 // To make the list of segments in station number "Station" (0...)
846 // from the list of hits to be reconstructed.
847 // Updates "fNSegments"[Station].
848 // Segments in stations 4 and 5 are sorted
849 // according to increasing absolute value of "impact parameter"
850 AliMUONHitForRec *hit1Ptr, *hit2Ptr;
851 AliMUONSegment *segment;
852 Bool_t last2st;
853 Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor,
d0bfce8d 854 impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings.
9cbdf048 855 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 856 if (fPrintLevel >= 1)
857 cout << "enter MakeSegmentsPerStation (0...) " << Station << endl;
858 // first and second chambers (0...) in the station
859 Int_t ch1 = 2 * Station;
860 Int_t ch2 = ch1 + 1;
861 // variable true for stations downstream of the dipole:
862 // Station(0..4) equal to 3 or 4
863 if ((Station == 3) || (Station == 4)) {
864 last2st = kTRUE;
865 // maximum impact parameter (cm) according to fMinBendingMomentum...
866 maxImpactParam =
867 TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum));
d0bfce8d 868 // minimum impact parameter (cm) according to fMaxBendingMomentum...
869 minImpactParam =
870 TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum));
a9e2aefa 871 }
872 else last2st = kFALSE;
873 // extrapolation factor from Z of first chamber to Z of second chamber
874 // dZ to be changed to take into account fine structure of chambers ????
875 Double_t extrapFact =
9cbdf048 876 (&(pMUON->Chamber(ch2)))->Z() / (&(pMUON->Chamber(ch1)))->Z();
a9e2aefa 877 // index for current segment
878 Int_t segmentIndex = 0;
879 // Loop over HitsForRec in the first chamber of the station
880 for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1];
881 hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1];
882 hit1++) {
883 // pointer to the HitForRec
884 hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]);
885 // extrapolation,
886 // on the straight line joining the HitForRec to the vertex (0,0,0),
887 // to the Z of the second chamber of the station
888 extBendCoor = extrapFact * hit1Ptr->GetBendingCoor();
889 extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor();
890 // Loop over HitsForRec in the second chamber of the station
891 for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2];
892 hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2];
893 hit2++) {
894 // pointer to the HitForRec
895 hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]);
896 // absolute values of distances, in bending and non bending planes,
897 // between the HitForRec in the second chamber
898 // and the previous extrapolation
899 distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor);
900 distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor);
901 if (last2st) {
902 // bending slope
903 bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) /
904 (hit1Ptr->GetZ() - hit2Ptr->GetZ());
905 // absolute value of impact parameter
906 impactParam =
31817925 907 TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope);
a9e2aefa 908 }
909 // check for distances not too large,
910 // and impact parameter not too big if stations downstream of the dipole.
911 // Conditions "distBend" and "impactParam" correlated for these stations ????
912 if ((distBend < fSegmentMaxDistBending[Station]) &&
913 (distNonBend < fSegmentMaxDistNonBending[Station]) &&
d0bfce8d 914 (!last2st || (impactParam < maxImpactParam)) &&
915 (!last2st || (impactParam > minImpactParam))) {
a9e2aefa 916 // make new segment
917 segment = new ((*fSegmentsPtr[Station])[segmentIndex])
918 AliMUONSegment(hit1Ptr, hit2Ptr);
919 // update "link" to this segment from the hit in the first chamber
920 if (hit1Ptr->GetNSegments() == 0)
921 hit1Ptr->SetIndexOfFirstSegment(segmentIndex);
922 hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1);
923 if (fPrintLevel >= 10) {
924 cout << "segmentIndex(0...): " << segmentIndex
925 << " distBend: " << distBend
926 << " distNonBend: " << distNonBend
927 << endl;
928 segment->Dump();
929 cout << "HitForRec in first chamber" << endl;
930 hit1Ptr->Dump();
931 cout << "HitForRec in second chamber" << endl;
932 hit2Ptr->Dump();
933 };
934 // increment index for current segment
935 segmentIndex++;
936 }
937 } //for (Int_t hit2
938 } // for (Int_t hit1...
939 fNSegments[Station] = segmentIndex;
940 // Sorting according to "impact parameter" if station(1..5) 4 or 5,
941 // i.e. Station(0..4) 3 or 4, using the function "Compare".
942 // After this sorting, it is impossible to use
943 // the "fNSegments" and "fIndexOfFirstSegment"
944 // of the HitForRec in the first chamber to explore all segments formed with it.
945 // Is this sorting really needed ????
946 if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort();
947 if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: "
948 << fNSegments[Station] << endl;
949 return;
950}
951
952 //__________________________________________________________________________
953void AliMUONEventReconstructor::MakeTracks(void)
954{
955 // To make the tracks,
956 // from the list of segments and points in all stations
957 if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl;
8429a5e4 958 // The order may be important for the following Reset's
a9e2aefa 959 ResetTracks();
8429a5e4 960 ResetTrackHits();
83dbc640 961 if (fTrackMethod == 2) { //AZ - Kalman filter
962 MakeTrackCandidatesK();
963 // Follow tracks in stations(1..) 3, 2 and 1
964 FollowTracksK();
965 // Remove double tracks
966 RemoveDoubleTracksK();
967 // Propagate tracks to the vertex thru absorber
968 GoToVertex();
969 } else { //AZ
970 // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
971 MakeTrackCandidates();
972 // Follow tracks in stations(1..) 3, 2 and 1
973 FollowTracks();
974 // Remove double tracks
975 RemoveDoubleTracks();
976 }
52c9bc11 977 // AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON");
978 for(Int_t i=0; i<GetNRecTracks(); i++) {
979 AliMUONTrack * track = (AliMUONTrack*) GetRecTracksPtr()->At(i);
980 fMUONData->AddRecTrack(*track);
981 }
a9e2aefa 982 return;
983}
984
276c44b7 985 //__________________________________________________________________________
986void AliMUONEventReconstructor::MakeTriggerTracks(void)
987{
988 // To make the trigger tracks from Local Trigger
989 if (fPrintLevel >= 1) cout << "enter MakeTriggerTracks" << endl;
52c9bc11 990 // ResetTriggerTracks();
276c44b7 991
992 Int_t nTRentries;
52c9bc11 993 Long_t gloTrigPat;
276c44b7 994 TClonesArray *localTrigger;
9131b4fe 995 TClonesArray *globalTrigger;
276c44b7 996 AliMUONLocalTrigger *locTrg;
9131b4fe 997 AliMUONGlobalTrigger *gloTrg;
276c44b7 998 AliMUONTriggerCircuit *circuit;
52c9bc11 999 AliMUONTriggerTrack *recTriggerTrack = 0;
1000// TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly
1001// AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname);
1002// if (rl == 0x0)
1003// {
1004// Error("MakeTriggerTracks",
1005// "Can not find Run Loader in Event Folder named %s.",
1006// evfoldname.Data());
1007// return;
1008// }
1009// AliLoader* gime = rl->GetLoader("MUONLoader");
1010// if (gime == 0x0)
1011// {
1012// Error("MakeTriggerTracks","Can not get MUON Loader from Run Loader.");
1013// return;
1014// }
1015 TTree* TR = fLoader->TreeR();
276c44b7 1016
1017 // Loading AliRun master
52c9bc11 1018// rl->LoadgAlice();
1019// gAlice = rl->GetAliRun();
276c44b7 1020
1021 // Loading MUON subsystem
1022 AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON");
1023
1024 nTRentries = Int_t(TR->GetEntries());
1025 if (nTRentries != 1) {
52c9bc11 1026 cout << "Error in AliMUONEventReconstructor::MakeTriggerTracks"
1027 << endl;
1028 cout << "nTRentries = " << nTRentries << " not equal to 1" << endl;
1029 exit(0);
276c44b7 1030 }
52c9bc11 1031 fLoader->TreeR()->GetEvent(0); // only one entry
276c44b7 1032
52c9bc11 1033 fMUONData->SetTreeAddress("GLT");
1034 fMUONData->GetTrigger();
9131b4fe 1035
52c9bc11 1036 // global trigger for trigger pattern
9131b4fe 1037 gloTrigPat = 0;
52c9bc11 1038 globalTrigger = fMUONData->GlobalTrigger();
9131b4fe 1039 gloTrg = (AliMUONGlobalTrigger*)globalTrigger->UncheckedAt(0);
1040 if (gloTrg->SinglePlusLpt()) gloTrigPat|= 0x1;
1041 if (gloTrg->SinglePlusHpt()) gloTrigPat|= 0x2;
1042 if (gloTrg->SinglePlusApt()) gloTrigPat|= 0x4;
1043
1044 if (gloTrg->SingleMinusLpt()) gloTrigPat|= 0x8;
1045 if (gloTrg->SingleMinusHpt()) gloTrigPat|= 0x10;
1046 if (gloTrg->SingleMinusApt()) gloTrigPat|= 0x20;
1047
1048 if (gloTrg->SingleUndefLpt()) gloTrigPat|= 0x40;
1049 if (gloTrg->SingleUndefHpt()) gloTrigPat|= 0x80;
1050 if (gloTrg->SingleUndefApt()) gloTrigPat|= 0x100;
1051
1052 if (gloTrg->PairUnlikeLpt()) gloTrigPat|= 0x200;
1053 if (gloTrg->PairUnlikeHpt()) gloTrigPat|= 0x400;
1054 if (gloTrg->PairUnlikeApt()) gloTrigPat|= 0x800;
1055
1056 if (gloTrg->PairLikeLpt()) gloTrigPat|= 0x1000;
1057 if (gloTrg->PairLikeHpt()) gloTrigPat|= 0x2000;
1058 if (gloTrg->PairLikeApt()) gloTrigPat|= 0x4000;
1059
52c9bc11 1060
1061
1062 // local trigger for tracking
1063 localTrigger = fMUONData->LocalTrigger();
276c44b7 1064 Int_t nlocals = (Int_t) (localTrigger->GetEntries());
1065 Float_t z11 = ( &(pMUON->Chamber(10)) )->Z();
1066 Float_t z21 = ( &(pMUON->Chamber(12)) )->Z();
1067
1068 for (Int_t i=0; i<nlocals; i++) { // loop on Local Trigger
52c9bc11 1069 locTrg = (AliMUONLocalTrigger*)localTrigger->UncheckedAt(i);
1070 circuit = &(pMUON->TriggerCircuit(locTrg->LoCircuit()));
1071 Float_t y11 = circuit->GetY11Pos(locTrg->LoStripX());
aeb4f510 1072 Int_t stripX21 = locTrg->LoStripX()+locTrg->LoDev()+1;
1073 Float_t y21 = circuit->GetY21Pos(stripX21);
52c9bc11 1074 Float_t x11 = circuit->GetX11Pos(locTrg->LoStripY());
1075 Float_t thetax = TMath::ATan2( x11 , z11 );
1076 Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) );
1077
1078 recTriggerTrack = new AliMUONTriggerTrack(x11,y11,thetax,thetay,gloTrigPat,this);
1079 // since static statement does not work, set gloTrigPat for each track
1080
1081 // fNRecTriggerTracks++;
1082 fMUONData->AddRecTriggerTrack(*recTriggerTrack);
276c44b7 1083 } // end of loop on Local Trigger
1084 return;
1085}
1086
a9e2aefa 1087 //__________________________________________________________________________
1088Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment)
1089{
1090 // To make track candidates with two segments in stations(1..) 4 and 5,
1091 // the first segment being pointed to by "BegSegment".
1092 // Returns the number of such track candidates.
1093 Int_t endStation, iEndSegment, nbCan2Seg;
1094 AliMUONSegment *endSegment, *extrapSegment;
1095 AliMUONTrack *recTrack;
1096 Double_t mcsFactor;
1097 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl;
1098 // Station for the end segment
1099 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1100 // multiple scattering factor corresponding to one chamber
1101 mcsFactor = 0.0136 /
1102 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1103 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1104 // linear extrapolation to end station
1105 extrapSegment =
1106 BegSegment->CreateSegmentFromLinearExtrapToStation(endStation, mcsFactor);
1107 // number of candidates with 2 segments to 0
1108 nbCan2Seg = 0;
1109 // Loop over segments in the end station
1110 for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) {
1111 // pointer to segment
1112 endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]);
1113 // test compatibility between current segment and "extrapSegment"
04b5ea16 1114 // 4 because 4 quantities in chi2
a9e2aefa 1115 if ((endSegment->
1116 NormalizedChi2WithSegment(extrapSegment,
1117 fMaxSigma2Distance)) <= 4.0) {
1118 // both segments compatible:
1119 // make track candidate from "begSegment" and "endSegment"
1120 if (fPrintLevel >= 2)
1121 cout << "TrackCandidate with Segment " << iEndSegment <<
1122 " in Station(0..) " << endStation << endl;
1123 // flag for both segments in one track:
1124 // to be done in track constructor ????
1125 BegSegment->SetInTrack(kTRUE);
1126 endSegment->SetInTrack(kTRUE);
1127 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1128 AliMUONTrack(BegSegment, endSegment, this);
1129 fNRecTracks++;
1130 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1131 // increment number of track candidates with 2 segments
1132 nbCan2Seg++;
1133 }
1134 } // for (iEndSegment = 0;...
1135 delete extrapSegment; // should not delete HitForRec's it points to !!!!
1136 return nbCan2Seg;
1137}
1138
1139 //__________________________________________________________________________
1140Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment)
1141{
1142 // To make track candidates with one segment and one point
1143 // in stations(1..) 4 and 5,
1144 // the segment being pointed to by "BegSegment".
1145 Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit;
1146 AliMUONHitForRec *extrapHitForRec, *hit;
1147 AliMUONTrack *recTrack;
1148 Double_t mcsFactor;
1149 if (fPrintLevel >= 1)
1150 cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl;
1151 // station for the end point
1152 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1153 // multiple scattering factor corresponding to one chamber
1154 mcsFactor = 0.0136 /
1155 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1156 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1157 // first and second chambers(0..) in the end station
1158 ch1 = 2 * endStation;
1159 ch2 = ch1 + 1;
1160 // number of candidates to 0
1161 nbCan1Seg1Hit = 0;
1162 // Loop over chambers of the end station
1163 for (ch = ch2; ch >= ch1; ch--) {
1164 // linear extrapolation to chamber
1165 extrapHitForRec =
1166 BegSegment->CreateHitForRecFromLinearExtrapToChamber(ch, mcsFactor);
1167 // limits for the hit index in the loop
1168 iHitMin = fIndexOfFirstHitForRecPerChamber[ch];
1169 iHitMax = iHitMin + fNHitsForRecPerChamber[ch];
1170 // Loop over HitForRec's in the chamber
1171 for (iHit = iHitMin; iHit < iHitMax; iHit++) {
1172 // pointer to HitForRec
1173 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
1174 // test compatibility between current HitForRec and "extrapHitForRec"
04b5ea16 1175 // 2 because 2 quantities in chi2
a9e2aefa 1176 if ((hit->
1177 NormalizedChi2WithHitForRec(extrapHitForRec,
1178 fMaxSigma2Distance)) <= 2.0) {
1179 // both HitForRec's compatible:
1180 // make track candidate from begSegment and current HitForRec
1181 if (fPrintLevel >= 2)
1182 cout << "TrackCandidate with HitForRec " << iHit <<
1183 " in Chamber(0..) " << ch << endl;
1184 // flag for beginning segments in one track:
1185 // to be done in track constructor ????
1186 BegSegment->SetInTrack(kTRUE);
1187 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1188 AliMUONTrack(BegSegment, hit, this);
1189 // the right place to eliminate "double counting" ???? how ????
1190 fNRecTracks++;
1191 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1192 // increment number of track candidates
1193 nbCan1Seg1Hit++;
1194 }
1195 } // for (iHit = iHitMin;...
1196 delete extrapHitForRec;
1197 } // for (ch = ch2;...
1198 return nbCan1Seg1Hit;
1199}
1200
1201 //__________________________________________________________________________
1202void AliMUONEventReconstructor::MakeTrackCandidates(void)
1203{
1204 // To make track candidates
1205 // with at least 3 aligned points in stations(1..) 4 and 5
1206 // (two Segment's or one Segment and one HitForRec)
1207 Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg;
1208 AliMUONSegment *begSegment;
1209 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl;
1210 // Loop over stations(1..) 5 and 4 for the beginning segment
1211 for (begStation = 4; begStation > 2; begStation--) {
1212 // Loop over segments in the beginning station
1213 for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) {
1214 // pointer to segment
1215 begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]);
1216 if (fPrintLevel >= 2)
1217 cout << "look for TrackCandidate's with Segment " << iBegSegment <<
1218 " in Station(0..) " << begStation << endl;
1219 // Look for track candidates with two segments,
1220 // "begSegment" and all compatible segments in other station.
1221 // Only for beginning station(1..) 5
1222 // because candidates with 2 segments have to looked for only once.
1223 if (begStation == 4)
1224 nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment);
956019b6 1225 // Look for track candidates with one segment and one point,
a9e2aefa 1226 // "begSegment" and all compatible HitForRec's in other station.
1227 // Only if "begSegment" does not belong already to a track candidate.
1228 // Is that a too strong condition ????
1229 if (!(begSegment->GetInTrack()))
1230 nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment);
1231 } // for (iBegSegment = 0;...
1232 } // for (begStation = 4;...
1233 return;
1234}
1235
1236 //__________________________________________________________________________
1237void AliMUONEventReconstructor::FollowTracks(void)
1238{
1239 // Follow tracks in stations(1..) 3, 2 and 1
04b5ea16 1240 // too long: should be made more modular !!!!
d0bfce8d 1241 AliMUONHitForRec *bestHit, *extrapHit, *extrapCorrHit, *hit;
1242 AliMUONSegment *bestSegment, *extrapSegment, *extrapCorrSegment, *segment;
04b5ea16 1243 AliMUONTrack *track, *nextTrack;
1244 AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex;
ecfa008b 1245 // -1 to avoid compilation warnings
1246 Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex;
04b5ea16 1247 Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor;
d0bfce8d 1248 Double_t bendingMomentum, chi2Norm = 0.;
9cbdf048 1249 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
04b5ea16 1250 // local maxSigma2Distance, for easy increase in testing
1251 maxSigma2Distance = fMaxSigma2Distance;
a9e2aefa 1252 if (fPrintLevel >= 2)
1253 cout << "enter FollowTracks" << endl;
1254 // Loop over track candidates
04b5ea16 1255 track = (AliMUONTrack*) fRecTracksPtr->First();
1256 trackIndex = -1;
1257 while (track) {
1258 // Follow function for each track candidate ????
1259 trackIndex++;
1260 nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track
a9e2aefa 1261 if (fPrintLevel >= 2)
1262 cout << "FollowTracks: track candidate(0..): " << trackIndex << endl;
956019b6 1263 // Fit track candidate
1264 track->SetFitMCS(0); // without multiple Coulomb scattering
1265 track->SetFitNParam(3); // with 3 parameters (X = Y = 0)
1266 track->SetFitStart(0); // from parameters at vertex
1267 track->Fit();
a9e2aefa 1268 if (fPrintLevel >= 10) {
1269 cout << "FollowTracks: track candidate(0..): " << trackIndex
956019b6 1270 << " after fit in stations(0..) 3 and 4" << endl;
a9e2aefa 1271 track->RecursiveDump();
1272 }
1273 // Loop over stations(1..) 3, 2 and 1
04b5ea16 1274 // something SPECIAL for stations 2 and 1 for majority 3 coincidence ????
1275 // otherwise: majority coincidence 2 !!!!
a9e2aefa 1276 for (station = 2; station >= 0; station--) {
1277 // Track parameters at first track hit (smallest Z)
1278 trackParam1 = ((AliMUONTrackHit*)
1279 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1280 // extrapolation to station
1281 trackParam1->ExtrapToStation(station, trackParam);
79e1e601 1282 extrapSegment = new AliMUONSegment(); // empty segment
d0bfce8d 1283 extrapCorrSegment = new AliMUONSegment(); // empty corrected segment
a9e2aefa 1284 // multiple scattering factor corresponding to one chamber
1285 // and momentum in bending plane (not total)
1286 mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum();
1287 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1288 // Z difference from previous station
9cbdf048 1289 dZ1 = (&(pMUON->Chamber(2 * station)))->Z() -
1290 (&(pMUON->Chamber(2 * station + 2)))->Z();
a9e2aefa 1291 // Z difference between the two previous stations
9cbdf048 1292 dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() -
1293 (&(pMUON->Chamber(2 * station + 4)))->Z();
04b5ea16 1294 // Z difference between the two chambers in the previous station
1295 dZ3 = (&(pMUON->Chamber(2 * station)))->Z() -
1296 (&(pMUON->Chamber(2 * station + 1)))->Z();
1297 extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1298 extrapSegment->
1299 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1300 extrapSegment->UpdateFromStationTrackParam
1301 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1302 trackParam1->GetInverseBendingMomentum());
d0bfce8d 1303 // same thing for corrected segment
1304 // better to use copy constructor, after checking that it works properly !!!!
1305 extrapCorrSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1306 extrapCorrSegment->
1307 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1308 extrapCorrSegment->UpdateFromStationTrackParam
1309 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1310 trackParam1->GetInverseBendingMomentum());
a9e2aefa 1311 bestChi2 = 5.0;
1312 bestSegment = NULL;
1313 if (fPrintLevel >= 10) {
1314 cout << "FollowTracks: track candidate(0..): " << trackIndex
1315 << " Look for segment in station(0..): " << station << endl;
1316 }
1317 // Loop over segments in station
1318 for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) {
1319 // Look for best compatible Segment in station
1320 // should consider all possibilities ????
1321 // multiple scattering ????
1322 // separation in 2 functions: Segment and HitForRec ????
1323 segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]);
d0bfce8d 1324 // correction of corrected segment (fBendingCoor and fNonBendingCoor)
1325 // according to real Z value of "segment" and slopes of "extrapSegment"
1326 extrapCorrSegment->
1327 SetBendingCoor(extrapSegment->GetBendingCoor() +
1328 extrapSegment->GetBendingSlope() *
1329 (segment->GetHitForRec1()->GetZ() -
1330 (&(pMUON->Chamber(2 * station)))->Z()));
1331 extrapCorrSegment->
1332 SetNonBendingCoor(extrapSegment->GetNonBendingCoor() +
1333 extrapSegment->GetNonBendingSlope() *
1334 (segment->GetHitForRec1()->GetZ() -
1335 (&(pMUON->Chamber(2 * station)))->Z()));
1336 chi2 = segment->
1337 NormalizedChi2WithSegment(extrapCorrSegment, maxSigma2Distance);
a9e2aefa 1338 if (chi2 < bestChi2) {
1339 // update best Chi2 and Segment if better found
1340 bestSegment = segment;
1341 bestChi2 = chi2;
1342 }
1343 }
1344 if (bestSegment) {
1345 // best segment found: add it to track candidate
1346 track->AddSegment(bestSegment);
1347 // set track parameters at these two TrakHit's
1348 track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0]));
1349 track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1]));
1350 if (fPrintLevel >= 10) {
1351 cout << "FollowTracks: track candidate(0..): " << trackIndex
1352 << " Added segment in station(0..): " << station << endl;
1353 track->RecursiveDump();
1354 }
1355 }
1356 else {
1357 // No best segment found:
1358 // Look for best compatible HitForRec in station:
1359 // should consider all possibilities ????
1360 // multiple scattering ???? do about like for extrapSegment !!!!
79e1e601 1361 extrapHit = new AliMUONHitForRec(); // empty hit
d0bfce8d 1362 extrapCorrHit = new AliMUONHitForRec(); // empty corrected hit
a9e2aefa 1363 bestChi2 = 3.0;
1364 bestHit = NULL;
1365 if (fPrintLevel >= 10) {
1366 cout << "FollowTracks: track candidate(0..): " << trackIndex
1367 << " Segment not found, look for hit in station(0..): " << station
1368 << endl;
1369 }
1370 // Loop over chambers of the station
d82671a0 1371 for (chInStation = 0; chInStation < 2; chInStation++) {
a9e2aefa 1372 // coordinates of extrapolated hit
d82671a0 1373 extrapHit->
1374 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1375 extrapHit->
1376 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
a9e2aefa 1377 // resolutions from "extrapSegment"
1378 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1379 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
d0bfce8d 1380 // same things for corrected hit
1381 // better to use copy constructor, after checking that it works properly !!!!
1382 extrapCorrHit->
1383 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1384 extrapCorrHit->
1385 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
1386 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1387 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
a9e2aefa 1388 // Loop over hits in the chamber
956019b6 1389 ch = 2 * station + chInStation;
a9e2aefa 1390 for (iHit = fIndexOfFirstHitForRecPerChamber[ch];
1391 iHit < fIndexOfFirstHitForRecPerChamber[ch] +
1392 fNHitsForRecPerChamber[ch];
1393 iHit++) {
1394 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
d0bfce8d 1395 // correction of corrected hit (fBendingCoor and fNonBendingCoor)
1396 // according to real Z value of "hit" and slopes of right "trackParam"
1397 extrapCorrHit->
1398 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor() +
1399 (&(trackParam[chInStation]))->GetBendingSlope() *
1400 (hit->GetZ() -
1401 (&(trackParam[chInStation]))->GetZ()));
1402 extrapCorrHit->
1403 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor() +
1404 (&(trackParam[chInStation]))->GetNonBendingSlope() *
1405 (hit->GetZ() -
1406 (&(trackParam[chInStation]))->GetZ()));
a9e2aefa 1407 // condition for hit not already in segment ????
1408 chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance);
1409 if (chi2 < bestChi2) {
1410 // update best Chi2 and HitForRec if better found
1411 bestHit = hit;
1412 bestChi2 = chi2;
d82671a0 1413 chBestHit = chInStation;
a9e2aefa 1414 }
1415 }
1416 }
1417 if (bestHit) {
1418 // best hit found: add it to track candidate
1419 track->AddHitForRec(bestHit);
956019b6 1420 // set track parameters at this TrackHit
a9e2aefa 1421 track->SetTrackParamAtHit(track->GetNTrackHits() - 1,
1422 &(trackParam[chBestHit]));
1423 if (fPrintLevel >= 10) {
1424 cout << "FollowTracks: track candidate(0..): " << trackIndex
1425 << " Added hit in station(0..): " << station << endl;
1426 track->RecursiveDump();
1427 }
1428 }
1429 else {
8429a5e4 1430 // Remove current track candidate
1431 // and corresponding TrackHit's, ...
1432 track->Remove();
04b5ea16 1433 delete extrapSegment;
d0bfce8d 1434 delete extrapCorrSegment;
1435 delete extrapHit;
1436 delete extrapCorrHit;
a9e2aefa 1437 break; // stop the search for this candidate:
1438 // exit from the loop over station
1439 }
d0bfce8d 1440 delete extrapHit;
1441 delete extrapCorrHit;
a9e2aefa 1442 }
04b5ea16 1443 delete extrapSegment;
d0bfce8d 1444 delete extrapCorrSegment;
a9e2aefa 1445 // Sort track hits according to increasing Z
1446 track->GetTrackHitsPtr()->Sort();
1447 // Update track parameters at first track hit (smallest Z)
1448 trackParam1 = ((AliMUONTrackHit*)
1449 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
d0bfce8d 1450 bendingMomentum = 0.;
1451 if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.)
1452 bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum()));
1453 // Track removed if bendingMomentum not in window [min, max]
1454 if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) {
1455 track->Remove();
1456 break; // stop the search for this candidate:
1457 // exit from the loop over station
1458 }
956019b6 1459 // Track fit
04b5ea16 1460 // with multiple Coulomb scattering if all stations
1461 if (station == 0) track->SetFitMCS(1);
956019b6 1462 // without multiple Coulomb scattering if not all stations
04b5ea16 1463 else track->SetFitMCS(0);
956019b6 1464 track->SetFitNParam(5); // with 5 parameters (momentum and position)
1465 track->SetFitStart(1); // from parameters at first hit
1466 track->Fit();
d0bfce8d 1467 Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5);
1468 if (numberOfDegFree > 0) {
1469 chi2Norm = track->GetFitFMin() / numberOfDegFree;
1470 } else {
1471 chi2Norm = 1.e10;
1472 }
1473 // Track removed if normalized chi2 too high
1474 if (chi2Norm > fMaxChi2) {
1475 track->Remove();
1476 break; // stop the search for this candidate:
1477 // exit from the loop over station
1478 }
a9e2aefa 1479 if (fPrintLevel >= 10) {
1480 cout << "FollowTracks: track candidate(0..): " << trackIndex
1481 << " after fit from station(0..): " << station << " to 4" << endl;
1482 track->RecursiveDump();
1483 }
04b5ea16 1484 // Track extrapolation to the vertex through the absorber (Branson)
956019b6 1485 // after going through the first station
04b5ea16 1486 if (station == 0) {
1487 trackParamVertex = *trackParam1;
1488 (&trackParamVertex)->ExtrapToVertex();
1489 track->SetTrackParamAtVertex(&trackParamVertex);
6ae236ee 1490 if (fPrintLevel >= 1) {
1491 cout << "FollowTracks: track candidate(0..): " << trackIndex
1492 << " after extrapolation to vertex" << endl;
1493 track->RecursiveDump();
1494 }
04b5ea16 1495 }
a9e2aefa 1496 } // for (station = 2;...
04b5ea16 1497 // go really to next track
1498 track = nextTrack;
1499 } // while (track)
1500 // Compression of track array (necessary after Remove ????)
1501 fRecTracksPtr->Compress();
1502 return;
1503}
1504
1505 //__________________________________________________________________________
8429a5e4 1506void AliMUONEventReconstructor::RemoveDoubleTracks(void)
1507{
1508 // To remove double tracks.
1509 // Tracks are considered identical
1510 // if they have at least half of their hits in common.
1511 // Among two identical tracks, one keeps the track with the larger number of hits
1512 // or, if these numbers are equal, the track with the minimum Chi2.
1513 AliMUONTrack *track1, *track2, *trackToRemove;
1514 Bool_t identicalTracks;
1515 Int_t hitsInCommon, nHits1, nHits2;
1516 identicalTracks = kTRUE;
1517 while (identicalTracks) {
1518 identicalTracks = kFALSE;
1519 // Loop over first track of the pair
1520 track1 = (AliMUONTrack*) fRecTracksPtr->First();
1521 while (track1 && (!identicalTracks)) {
1522 nHits1 = track1->GetNTrackHits();
1523 // Loop over second track of the pair
1524 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1525 while (track2 && (!identicalTracks)) {
1526 nHits2 = track2->GetNTrackHits();
1527 // number of hits in common between two tracks
1528 hitsInCommon = track1->HitsInCommon(track2);
1529 // check for identical tracks
1530 if ((4 * hitsInCommon) >= (nHits1 + nHits2)) {
1531 identicalTracks = kTRUE;
1532 // decide which track to remove
1533 if (nHits1 > nHits2) trackToRemove = track2;
1534 else if (nHits1 < nHits2) trackToRemove = track1;
1535 else if ((track1->GetFitFMin()) < (track2->GetFitFMin()))
1536 trackToRemove = track2;
1537 else trackToRemove = track1;
1538 // remove it
1539 trackToRemove->Remove();
1540 }
1541 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
1542 } // track2
1543 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1544 } // track1
1545 }
1546 return;
1547}
1548
1549 //__________________________________________________________________________
04b5ea16 1550void AliMUONEventReconstructor::EventDump(void)
1551{
1552 // Dump reconstructed event (track parameters at vertex and at first hit),
1553 // and the particle parameters
1554
1555 AliMUONTrack *track;
1556 AliMUONTrackParam *trackParam, *trackParam1;
04b5ea16 1557 Double_t bendingSlope, nonBendingSlope, pYZ;
1558 Double_t pX, pY, pZ, x, y, z, c;
1559 Int_t np, trackIndex, nTrackHits;
1560
1561 if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl;
1562 if (fPrintLevel >= 1) {
1563 cout << " Number of Reconstructed tracks :" << fNRecTracks << endl;
1564 }
1565 fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole
1566 // Loop over reconstructed tracks
1567 for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) {
83dbc640 1568 if (fTrackMethod != 1) continue; //AZ - skip the rest for now
04b5ea16 1569 if (fPrintLevel >= 1)
1570 cout << " track number: " << trackIndex << endl;
1571 // function for each track for modularity ????
1572 track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]);
1573 nTrackHits = track->GetNTrackHits();
1574 if (fPrintLevel >= 1)
1575 cout << " number of track hits: " << nTrackHits << endl;
1576 // track parameters at Vertex
1577 trackParam = track->GetTrackParamAtVertex();
1578 x = trackParam->GetNonBendingCoor();
1579 y = trackParam->GetBendingCoor();
1580 z = trackParam->GetZ();
1581 bendingSlope = trackParam->GetBendingSlope();
1582 nonBendingSlope = trackParam->GetNonBendingSlope();
1583 pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
1584 pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope);
1585 pX = pZ * nonBendingSlope;
1586 pY = pZ * bendingSlope;
1587 c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum());
1588 if (fPrintLevel >= 1)
1589 printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1590 z, x, y, pX, pY, pZ, c);
1591
1592 // track parameters at first hit
1593 trackParam1 = ((AliMUONTrackHit*)
1594 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1595 x = trackParam1->GetNonBendingCoor();
1596 y = trackParam1->GetBendingCoor();
1597 z = trackParam1->GetZ();
1598 bendingSlope = trackParam1->GetBendingSlope();
1599 nonBendingSlope = trackParam1->GetNonBendingSlope();
1600 pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum());
1601 pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope);
1602 pX = pZ * nonBendingSlope;
1603 pY = pZ * bendingSlope;
1604 c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum());
1605 if (fPrintLevel >= 1)
1606 printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1607 z, x, y, pX, pY, pZ, c);
1608 }
1609 // informations about generated particles
5d12ce38 1610 np = gAlice->GetMCApp()->GetNtrack();
04b5ea16 1611 printf(" **** number of generated particles: %d \n", np);
1612
88cb7938 1613// for (Int_t iPart = 0; iPart < np; iPart++) {
1614// p = gAlice->Particle(iPart);
1615// printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n",
1616// iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode());
1617// }
a9e2aefa 1618 return;
1619}
1620
276c44b7 1621
1622//__________________________________________________________________________
1623void AliMUONEventReconstructor::EventDumpTrigger(void)
1624{
1625 // Dump reconstructed trigger event
1626 // and the particle parameters
1627
52c9bc11 1628 AliMUONTriggerTrack *triggertrack ;
1629 Int_t nTriggerTracks = fMUONData->RecTriggerTracks()->GetEntriesFast();
276c44b7 1630
276c44b7 1631 if (fPrintLevel >= 1) {
52c9bc11 1632 cout << "****** enter EventDumpTrigger ******" << endl;
1633 cout << " Number of Reconstructed tracks :" << nTriggerTracks << endl;
276c44b7 1634 }
1635 // Loop over reconstructed tracks
52c9bc11 1636 for (Int_t trackIndex = 0; trackIndex < nTriggerTracks; trackIndex++) {
1637 triggertrack = (AliMUONTriggerTrack*)fMUONData->RecTriggerTracks()->At(trackIndex);
276c44b7 1638 printf(" trigger track number %i x11=%f y11=%f thetax=%f thetay=%f \n",
1639 trackIndex,
1640 triggertrack->GetX11(),triggertrack->GetY11(),
1641 triggertrack->GetThetax(),triggertrack->GetThetay());
1642 }
1643}
1644
1645//__________________________________________________________________________
c7ba256d 1646void AliMUONEventReconstructor::FillEvent()
1647{
1648// Create a new AliMUONRecoEvent, fill its track list, then add it as a
1649// leaf in the Event branch of TreeRecoEvent tree
1650 cout << "Enter FillEvent() ...\n";
1651
1652 if (!fRecoEvent) {
1653 fRecoEvent = new AliMUONRecoEvent();
1654 } else {
1655 fRecoEvent->Clear();
1656 }
1657 //save current directory
1658 TDirectory *current = gDirectory;
1659 if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE");
1660 if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events");
83dbc640 1661 //AZif (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) {
1662 if (fRecoEvent->MakeDumpTracks(fMuons, fRecTracksPtr, this)) { //AZ
c7ba256d 1663 if (fPrintLevel > 1) fRecoEvent->EventInfo();
1664 TBranch *branch = fEventTree->GetBranch("Event");
d0f40f23 1665 if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000);
c7ba256d 1666 branch->SetAutoDelete();
1667 fTreeFile->cd();
1668 fEventTree->Fill();
1669 fTreeFile->Write();
1670 }
1671 // restore directory
1672 current->cd();
1673}
83dbc640 1674
1675//__________________________________________________________________________
1676void AliMUONEventReconstructor::MakeTrackCandidatesK(void)
1677{
1678 // To make initial tracks for Kalman filter from the list of segments
1679 Int_t istat, iseg;
1680 AliMUONSegment *segment;
1681 AliMUONTrackK *trackK;
1682
1683 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesK" << endl;
1684 // Reset the TClonesArray of reconstructed tracks
1685 if (fRecTracksPtr) fRecTracksPtr->Delete();
1686 // Delete in order that the Track destructors are called,
1687 // hence the space for the TClonesArray of pointers to TrackHit's is freed
1688 fNRecTracks = 0;
1689
1690 AliMUONTrackK a(this, fHitsForRecPtr); // bad idea ???
1691 // Loop over stations(1...) 5 and 4
1692 for (istat=4; istat>=3; istat--) {
1693 // Loop over segments in the station
1694 for (iseg=0; iseg<fNSegments[istat]; iseg++) {
1695 // Transform segments to tracks and evaluate covariance matrix
1696 segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]);
1697 trackK = new ((*fRecTracksPtr)[fNRecTracks]) AliMUONTrackK(segment);
1698 fNRecTracks++;
1699 } // for (iseg=0;...)
1700 } // for (istat=4;...)
1701 return;
1702}
1703
1704//__________________________________________________________________________
1705void AliMUONEventReconstructor::FollowTracksK(void)
1706{
1707 // Follow tracks using Kalman filter
1708 Bool_t Ok;
1709 Int_t icand, ichamBeg, ichamEnd, chamBits;
1710 Double_t zDipole1, zDipole2;
1711 AliMUONTrackK *trackK;
1712 AliMUONHitForRec *hit;
1713 AliMUONRawCluster *clus;
1714 TClonesArray *rawclusters;
1715 AliMUON *pMUON;
1716 clus = 0; rawclusters = 0;
1717
1718 zDipole1 = GetSimpleBPosition() - GetSimpleBLength()/2;
1719 zDipole2 = zDipole1 + GetSimpleBLength();
1720
1721 // Print hits
1722 pMUON = (AliMUON*) gAlice->GetModule("MUON");
1723 for (Int_t i1=0; i1<fNHitsForRec; i1++) {
1724 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]);
1725 //if (hit->GetTHTrack() > 1 || hit->GetGeantSignal() == 0) continue;
1726 /*
1727 cout << " Hit #" << hit->GetChamberNumber() << " ";
1728 cout << hit->GetBendingCoor() << " ";
1729 cout << hit->GetNonBendingCoor() << " ";
1730 cout << hit->GetZ() << " ";
1731 cout << hit->GetGeantSignal() << " ";
1732 cout << hit->GetTHTrack() << endl;
1733 */
1734 /*
1735 printf(" Hit # %d %10.4f %10.4f %10.4f",
1736 hit->GetChamberNumber(), hit->GetBendingCoor(),
1737 hit->GetNonBendingCoor(), hit->GetZ());
1738 if (fRecGeantHits) {
1739 // from GEANT hits
1740 printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack());
1741 } else {
1742 // from raw clusters
1743 rawclusters = pMUON->RawClustAddress(hit->GetChamberNumber());
1744 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->
1745 GetHitNumber());
1746 printf("%3d", clus->fTracks[1]-1);
1747 if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1);
1748 else printf("\n");
1749 }
1750 */
1751 }
1752
1753 icand = -1;
1754 Int_t nSeeds = fNRecTracks; // starting number of seeds
1755 // Loop over track candidates
1756 while (icand < fNRecTracks-1) {
1757 icand ++;
1758 trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]);
1759
1760 // Discard candidate which will produce the double track
1761 if (icand > 0) {
1762 Ok = CheckCandidateK(icand,nSeeds);
1763 if (!Ok) {
1764 //trackK->SetRecover(-1); // mark candidate to be removed
1765 //continue;
1766 }
1767 }
1768
1769 Ok = kTRUE;
1770 if (trackK->GetRecover() == 0) hit = (AliMUONHitForRec*)
1771 trackK->GetHitOnTrack()->Last(); // last hit
1772 else hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[1]; // 2'nd hit
1773 ichamBeg = hit->GetChamberNumber();
1774 ichamEnd = 0;
1775 // Check propagation direction
1776 if (trackK->GetTrackDir() > 0) {
1777 ichamEnd = 9; // forward propagation
1778 Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2);
1779 if (Ok) {
1780 ichamBeg = ichamEnd;
1781 ichamEnd = 6; // backward propagation
1782 // Change weight matrix and zero fChi2 for backpropagation
1783 trackK->StartBack();
1784 Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2);
1785 ichamBeg = ichamEnd;
1786 ichamEnd = 0;
1787 }
1788 } else {
1789 if (trackK->GetBPFlag()) {
1790 // backpropagation
1791 ichamEnd = 6; // backward propagation
1792 // Change weight matrix and zero fChi2 for backpropagation
1793 trackK->StartBack();
1794 Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2);
1795 ichamBeg = ichamEnd;
1796 ichamEnd = 0;
1797 }
1798 }
1799
1800 if (Ok) {
1801 trackK->SetTrackDir(-1);
1802 trackK->SetBPFlag(kFALSE);
1803 Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2);
1804 }
1805 if (Ok) trackK->SetTrackQuality(0); // compute "track quality"
1806 else trackK->SetRecover(-1); // mark candidate to be removed
1807
1808 // Majority 3 of 4 in first 2 stations
1809 chamBits = 0;
1810 for (Int_t i=0; i<trackK->GetNTrackHits(); i++) {
1811 hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[i];
1812 chamBits |= BIT(hit->GetChamberNumber()-1);
1813 }
1814 //if (!((chamBits&3)==3 || (chamBits>>2&3)==3)) trackK->SetRecover(-1);
1815 //mark candidate to be removed
1816 } // while
1817
1818 for (Int_t i=0; i<fNRecTracks; i++) {
1819 trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]);
1820 if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i);
1821 }
1822
1823 // Compress TClonesArray
1824 fRecTracksPtr->Compress();
1825 fNRecTracks = fRecTracksPtr->GetEntriesFast();
1826 return;
1827}
1828
1829//__________________________________________________________________________
1830Bool_t AliMUONEventReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds)
1831{
1832 // Discards track candidate if it will produce the double track (having
1833 // the same seed segment hits as hits of a good track found before)
1834 AliMUONTrackK *track1, *track2;
1835 AliMUONHitForRec *hit1, *hit2, *hit;
1836
1837 track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]);
1838 hit1 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[0]; // 1'st hit
1839 hit2 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[1]; // 2'nd hit
1840
1841 for (Int_t i=0; i<icand; i++) {
1842 track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]);
1843 //if (track2->GetRecover() < 0) continue;
1844 if (track2->GetRecover() < 0 && icand >= nSeeds) continue;
1845
1846 if (track1->GetStartSegment() == track2->GetStartSegment()) {
1847 return kFALSE;
1848 } else {
1849 Int_t nSame = 0;
1850 for (Int_t j=0; j<track2->GetNTrackHits(); j++) {
1851 hit = (AliMUONHitForRec*) (*track2->GetHitOnTrack())[j];
1852 if (hit == hit1 || hit == hit2) {
1853 nSame++;
1854 if (nSame == 2) return kFALSE;
1855 }
1856 } // for (Int_t j=0;
1857 }
1858 } // for (Int_t i=0;
1859 return kTRUE;
1860}
1861
1862//__________________________________________________________________________
1863void AliMUONEventReconstructor::RemoveDoubleTracksK(void)
1864{
1865 // Removes double tracks (sharing more than half of their hits). Keeps
1866 // the track with higher quality
1867 AliMUONTrackK *track1, *track2, *trackToKill;
1868
1869 // Sort tracks according to their quality
1870 fRecTracksPtr->Sort();
1871
1872 // Loop over first track of the pair
1873 track1 = (AliMUONTrackK*) fRecTracksPtr->First();
1874 while (track1) {
1875 // Loop over second track of the pair
1876 track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1);
1877 while (track2) {
1878 // Check whether or not to keep track2
1879 if (!track2->KeepTrack(track1)) {
1880 cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) <<
1881 " " << track2->GetTrackQuality() << endl;
1882 trackToKill = track2;
1883 track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2);
1884 trackToKill->Kill();
1885 fRecTracksPtr->Compress();
1886 } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2);
1887 } // track2
1888 track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1);
1889 } // track1
1890
1891 fNRecTracks = fRecTracksPtr->GetEntriesFast();
1892 cout << " Number of Kalman tracks: " << fNRecTracks << endl;
1893}
1894
1895//__________________________________________________________________________
1896void AliMUONEventReconstructor::GoToVertex(void)
1897{
1898 // Propagates track to the vertex thru absorber
1899 // (using Branson correction for now)
1900
1901 Double_t zVertex;
1902 zVertex = 0;
1903 for (Int_t i=0; i<fNRecTracks; i++) {
1904 //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson();
1905 //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber
1906 ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2
1907 ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(); // with absorber
1908 }
1909}