]> git.uio.no Git - u/mrichter/AliRoot.git/blame - MUON/AliMUONEventReconstructor.cxx
git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Curent bur fixed
[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
16/*
17$Log$
47a6b602 18Revision 1.23 2001/01/26 21:44:45 morsch
19Use access functions to AliMUONDigit, ... member data.
20
0a5f36d9 21Revision 1.22 2001/01/26 20:00:53 hristov
22Major upgrade of AliRoot code
3f5cf0b3 23Revision 1.20 2001/01/08 11:01:02 gosset
24Modifications used for addendum to Dimuon TDR (JP Cussonneau):
25*. MaxBendingMomentum to make both a segment and a track (default 500)
26*. MaxChi2 per degree of freedom to make a track (default 100)
27*. MinBendingMomentum used also to make a track
28 and not only a segment (default 3)
29*. wider roads for track search in stations 1 to 3
30*. extrapolation to actual Z instead of Z(chamber) in FollowTracks
31*. in track fit:
32 - limits on parameters X and Y (+/-500)
33 - covariance matrices in double precision
34 - normalization of covariance matrices before inversion
35 - suppression of Minuit printouts
36*. correction against memory leak (delete extrapHit) in FollowTracks
37*. RMax to 10 degrees with Z(chamber) instead of fixed values;
38 RMin and Rmax cuts suppressed in NewHitForRecFromGEANT,
39 because useless with realistic geometry
40
d0bfce8d 41Revision 1.19 2000/11/20 11:24:10 gosset
42New package for reconstructed tracks (A. Gheata):
43* tree output in the file "tree_reco.root"
44* display events and make histograms from this file
45
c7ba256d 46Revision 1.18 2000/10/26 12:47:03 gosset
47Real distance between chambers of each station taken into account
48for the reconstruction parameters "fSegmentMaxDistBending[5]"
49
860cef81 50Revision 1.17 2000/10/24 09:26:20 gosset
51Comments updated
52
ba5b68db 53Revision 1.16 2000/10/24 09:22:35 gosset
54Method AddHitsForRecFromRawClusters: real Z of raw cluster and not Z of chamber
55
cfe0107f 56Revision 1.15 2000/10/12 15:17:30 gosset
57Sign of fSimpleBValue corrected: sign ox Bx and not Bz (thanks to Galina)
58
065bd0e1 59Revision 1.14 2000/10/04 18:21:26 morsch
60Include stdlib.h
61
e7d455d5 62Revision 1.13 2000/10/02 21:28:09 fca
63Removal of useless dependecies via forward declarations
64
94de3818 65Revision 1.12 2000/10/02 16:58:29 egangler
66Cleaning of the code :
67-> coding conventions
68-> void Streamers
69-> some useless includes removed or replaced by "class" statement
70
ecfa008b 71Revision 1.11 2000/09/22 09:16:33 hristov
72Casting needed on DEC
73
8832c7b4 74Revision 1.10 2000/09/19 09:49:50 gosset
75AliMUONEventReconstructor package
76* track extrapolation independent from reco_muon.F, use of AliMagF...
77* possibility to use new magnetic field (automatic from generated root file)
78
a6f03ddb 79Revision 1.9 2000/07/20 12:45:27 gosset
80New "EventReconstructor..." structure,
81 hopefully more adapted to tree/streamer.
82"AliMUONEventReconstructor::RemoveDoubleTracks"
83 to keep only one track among similar ones.
84
8429a5e4 85Revision 1.8 2000/07/18 16:04:06 gosset
86AliMUONEventReconstructor package:
87* a few minor modifications and more comments
88* a few corrections
89 * right sign for Z of raw clusters
90 * right loop over chambers inside station
91 * symmetrized covariance matrix for measurements (TrackChi2MCS)
92 * right sign of charge in extrapolation (ExtrapToZ)
93 * right zEndAbsorber for Branson correction below 3 degrees
94* use of TVirtualFitter instead of TMinuit for AliMUONTrack::Fit
95* no parameter for AliMUONTrack::Fit() but more fit parameters in Track object
96
956019b6 97Revision 1.7 2000/07/03 12:28:06 gosset
98Printout at the right place after extrapolation to vertex
99
6ae236ee 100Revision 1.6 2000/06/30 12:01:06 gosset
101Correction for hit search in the right chamber (JPC)
102
d82671a0 103Revision 1.5 2000/06/30 10:15:48 gosset
104Changes to EventReconstructor...:
105precision fit with multiple Coulomb scattering;
106extrapolation to vertex with Branson correction in absorber (JPC)
107
04b5ea16 108Revision 1.4 2000/06/27 14:11:36 gosset
109Corrections against violations of coding conventions
110
9cbdf048 111Revision 1.3 2000/06/16 07:27:08 gosset
112To remove problem in running RuleChecker, like in MUON-dev
113
79e1e601 114Revision 1.1.2.5 2000/06/16 07:00:26 gosset
115To remove problem in running RuleChecker
116
a9e2aefa 117Revision 1.1.2.4 2000/06/12 08:00:07 morsch
118Dummy streamer to solve CINT compilation problem (to be investigated !)
119
120Revision 1.1.2.3 2000/06/09 20:59:57 morsch
121Make includes consistent with new file structure.
122
123Revision 1.1.2.2 2000/06/09 12:58:05 gosset
124Removed comment beginnings in Log sections of .cxx files
125Suppressed most violations of coding rules
126
127Revision 1.1.2.1 2000/06/07 14:44:53 gosset
128Addition of files for track reconstruction in C++
129*/
130
131//__________________________________________________________________________
132//
133// MUON event reconstructor in ALICE
134//
135// This class contains as data:
136// * the parameters for the event reconstruction
137// * a pointer to the array of hits to be reconstructed (the event)
138// * a pointer to the array of segments made with these hits inside each station
139// * a pointer to the array of reconstructed tracks
140//
141// It contains as methods, among others:
142// * MakeEventToBeReconstructed to build the array of hits to be reconstructed
143// * MakeSegments to build the segments
144// * MakeTracks to build the tracks
145//__________________________________________________________________________
146
147#include <iostream.h>
e7d455d5 148#include <stdlib.h>
a9e2aefa 149
150#include <TRandom.h>
151#include <TFile.h>
94de3818 152#include <TTree.h>
a9e2aefa 153
a9e2aefa 154#include "AliMUONEventReconstructor.h"
155#include "AliMUON.h"
156#include "AliMUONHitForRec.h"
157#include "AliMUONSegment.h"
158#include "AliMUONHit.h"
159#include "AliMUONRawCluster.h"
160#include "AliMUONTrack.h"
161#include "AliMUONChamber.h"
162#include "AliMUONTrackHit.h"
94de3818 163#include "AliMagF.h"
a9e2aefa 164#include "AliRun.h"
04b5ea16 165#include "TParticle.h"
c7ba256d 166#include "AliMUONRecoEvent.h"
a9e2aefa 167
a9e2aefa 168//************* Defaults parameters for reconstruction
9cbdf048 169static const Double_t kDefaultMinBendingMomentum = 3.0;
d0bfce8d 170static const Double_t kDefaultMaxBendingMomentum = 500.0;
171static const Double_t kDefaultMaxChi2 = 100.0;
9cbdf048 172static const Double_t kDefaultMaxSigma2Distance = 16.0;
173static const Double_t kDefaultBendingResolution = 0.01;
174static const Double_t kDefaultNonBendingResolution = 0.144;
175static const Double_t kDefaultChamberThicknessInX0 = 0.03;
a9e2aefa 176// Simple magnetic field:
177// Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG
178// Length and Position from reco_muon.F, with opposite sign:
179// Length = ZMAGEND-ZCOIL
180// Position = (ZMAGEND+ZCOIL)/2
181// to be ajusted differently from real magnetic field ????
9cbdf048 182static const Double_t kDefaultSimpleBValue = 7.0;
183static const Double_t kDefaultSimpleBLength = 428.0;
184static const Double_t kDefaultSimpleBPosition = 1019.0;
185static const Int_t kDefaultRecGeantHits = 0;
186static const Double_t kDefaultEfficiency = 0.95;
a9e2aefa 187
9cbdf048 188static const Int_t kDefaultPrintLevel = 0;
a9e2aefa 189
190ClassImp(AliMUONEventReconstructor) // Class implementation in ROOT context
191
192 //__________________________________________________________________________
193AliMUONEventReconstructor::AliMUONEventReconstructor(void)
194{
195 // Constructor for class AliMUONEventReconstructor
196 SetReconstructionParametersToDefaults();
197 // Memory allocation for the TClonesArray of hits for reconstruction
198 // Is 10000 the right size ????
199 fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000);
200 fNHitsForRec = 0; // really needed or GetEntriesFast sufficient ????
201 // Memory allocation for the TClonesArray's of segments in stations
202 // Is 2000 the right size ????
9cbdf048 203 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 204 fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000);
205 fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ????
206 }
207 // Memory allocation for the TClonesArray of reconstructed tracks
208 // Is 10 the right size ????
209 fRecTracksPtr = new TClonesArray("AliMUONTrack", 10);
210 fNRecTracks = 0; // really needed or GetEntriesFast sufficient ????
8429a5e4 211 // Memory allocation for the TClonesArray of hits on reconstructed tracks
212 // Is 100 the right size ????
213 fRecTrackHitsPtr = new TClonesArray("AliMUONTrack", 100);
214 fNRecTrackHits = 0; // really needed or GetEntriesFast sufficient ????
a9e2aefa 215
065bd0e1 216 // Sign of fSimpleBValue according to sign of Bx value at (50,50,950).
a6f03ddb 217 Float_t b[3], x[3];
218 x[0] = 50.; x[1] = 50.; x[2] = 950.;
219 gAlice->Field()->Field(x, b);
065bd0e1 220 fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]);
a6f03ddb 221 // See how to get fSimple(BValue, BLength, BPosition)
222 // automatically calculated from the actual magnetic field ????
a9e2aefa 223
224 if (fPrintLevel >= 0) {
a6f03ddb 225 cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump();
226 cout << endl << "Magnetic field from root file:" << endl;
227 gAlice->Field()->Dump();
228 cout << endl;
229 }
c7ba256d 230
47a6b602 231 // Initializions for GEANT background events
232 fBkgGeantFile = 0;
233 fBkgGeantTK = 0;
234 fBkgGeantParticles = 0;
235 fBkgGeantTH = 0;
236 fBkgGeantHits = 0;
237 fBkgGeantEventNumber = -1;
238
c7ba256d 239 // Initialize to 0 pointers to RecoEvent, tree and tree file
240 fRecoEvent = 0;
241 fEventTree = 0;
242 fTreeFile = 0;
243
a9e2aefa 244 return;
245}
246
9cbdf048 247AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& Reconstructor)
248{
249 // Dummy copy constructor
250}
251
252AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& Reconstructor)
253{
254 // Dummy assignment operator
255 return *this;
256}
257
a9e2aefa 258 //__________________________________________________________________________
259AliMUONEventReconstructor::~AliMUONEventReconstructor(void)
260{
261 // Destructor for class AliMUONEventReconstructor
c7ba256d 262 if (fTreeFile) {
263 fTreeFile->Close();
264 delete fTreeFile;
265 }
266// if (fEventTree) delete fEventTree;
267 if (fRecoEvent) delete fRecoEvent;
a9e2aefa 268 delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ????
9cbdf048 269 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 270 delete fSegmentsPtr[st]; // Correct destruction of everything ????
271 return;
272}
273
274 //__________________________________________________________________________
275void AliMUONEventReconstructor::SetReconstructionParametersToDefaults(void)
276{
277 // Set reconstruction parameters to default values
278 // Would be much more convenient with a structure (or class) ????
9cbdf048 279 fMinBendingMomentum = kDefaultMinBendingMomentum;
d0bfce8d 280 fMaxBendingMomentum = kDefaultMaxBendingMomentum;
281 fMaxChi2 = kDefaultMaxChi2;
9cbdf048 282 fMaxSigma2Distance = kDefaultMaxSigma2Distance;
a9e2aefa 283
9cbdf048 284 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON");
a9e2aefa 285 // ******** Parameters for making HitsForRec
286 // minimum radius,
287 // like in TRACKF_STAT:
288 // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3;
289 // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9
9cbdf048 290 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
291 if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
a9e2aefa 292 2.0 * TMath::Pi() / 180.0;
293 else fRMin[ch] = 30.0;
d0bfce8d 294 // maximum radius at 10 degrees and Z of chamber
295 fRMax[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
296 10.0 * TMath::Pi() / 180.0;
a9e2aefa 297 }
a9e2aefa 298
299 // ******** Parameters for making segments
300 // should be parametrized ????
301 // according to interval between chambers in a station ????
302 // Maximum distance in non bending plane
303 // 5 * 0.22 just to remember the way it was made in TRACKF_STAT
304 // SIGCUT*DYMAX(IZ)
9cbdf048 305 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 306 fSegmentMaxDistNonBending[st] = 5. * 0.22;
860cef81 307 // Maximum distance in bending plane:
308 // values from TRACKF_STAT, corresponding to (J psi 20cm),
309 // scaled to the real distance between chambers in a station
310 fSegmentMaxDistBending[0] = 1.5 *
311 ((&(pMUON->Chamber(1)))->Z() - (&(pMUON->Chamber(0)))->Z()) / 20.0;
312 fSegmentMaxDistBending[1] = 1.5 *
313 ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0;
314 fSegmentMaxDistBending[2] = 3.0 *
315 ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0;
316 fSegmentMaxDistBending[3] = 6.0 *
317 ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0;
318 fSegmentMaxDistBending[4] = 6.0 *
319 ((&(pMUON->Chamber(9)))->Z() - (&(pMUON->Chamber(8)))->Z()) / 20.0;
a9e2aefa 320
9cbdf048 321 fBendingResolution = kDefaultBendingResolution;
322 fNonBendingResolution = kDefaultNonBendingResolution;
323 fChamberThicknessInX0 = kDefaultChamberThicknessInX0;
324 fSimpleBValue = kDefaultSimpleBValue;
325 fSimpleBLength = kDefaultSimpleBLength;
326 fSimpleBPosition = kDefaultSimpleBPosition;
327 fRecGeantHits = kDefaultRecGeantHits;
328 fEfficiency = kDefaultEfficiency;
329 fPrintLevel = kDefaultPrintLevel;
a9e2aefa 330 return;
331}
332
333//__________________________________________________________________________
334Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum)
335{
336 // Returns impact parameter at vertex in bending plane (cm),
337 // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c),
338 // using simple values for dipole magnetic field.
065bd0e1 339 // The sign of "BendingMomentum" is the sign of the charge.
a9e2aefa 340 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
341 BendingMomentum);
342}
343
344//__________________________________________________________________________
345Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam)
346{
347 // Returns signed bending momentum in bending plane (GeV/c),
065bd0e1 348 // the sign being the sign of the charge for particles moving forward in Z,
a9e2aefa 349 // from the impact parameter "ImpactParam" at vertex in bending plane (cm),
350 // using simple values for dipole magnetic field.
a9e2aefa 351 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
352 ImpactParam);
353}
354
355//__________________________________________________________________________
356void AliMUONEventReconstructor::SetBkgGeantFile(Text_t *BkgGeantFileName)
357{
358 // Set background file ... for GEANT hits
359 // Must be called after having loaded the firts signal event
360 if (fPrintLevel >= 0) {
361 cout << "Enter SetBkgGeantFile with BkgGeantFileName ``"
362 << BkgGeantFileName << "''" << endl;}
363 if (strlen(BkgGeantFileName)) {
364 // BkgGeantFileName not empty: try to open the file
365 if (fPrintLevel >= 2) {cout << "Before File(Bkg)" << endl; gDirectory->Dump();}
366 fBkgGeantFile = new TFile(BkgGeantFileName);
367 if (fPrintLevel >= 2) {cout << "After File(Bkg)" << endl; gDirectory->Dump();}
368 if (fBkgGeantFile-> IsOpen()) {
369 if (fPrintLevel >= 0) {
370 cout << "Background for GEANT hits in file: ``" << BkgGeantFileName
371 << "'' successfully opened" << endl;}
372 }
373 else {
374 cout << "Background for GEANT hits in file: " << BkgGeantFileName << endl;
375 cout << "NOT FOUND: EXIT" << endl;
376 exit(0); // right instruction for exit ????
377 }
378 // Arrays for "particles" and "hits"
379 fBkgGeantParticles = new TClonesArray("TParticle", 200);
380 fBkgGeantHits = new TClonesArray("AliMUONHit", 2000);
381 // Event number to -1 for initialization
382 fBkgGeantEventNumber = -1;
383 // Back to the signal file:
384 // first signal event must have been loaded previously,
385 // otherwise, Segmentation violation at the next instruction
386 // How is it possible to do smething better ????
387 ((gAlice->TreeK())->GetCurrentFile())->cd();
388 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
389 }
390 return;
391}
392
393//__________________________________________________________________________
394void AliMUONEventReconstructor::NextBkgGeantEvent(void)
395{
396 // Get next event in background file for GEANT hits
397 // Goes back to event number 0 when end of file is reached
398 char treeName[20];
399 TBranch *branch;
400 if (fPrintLevel >= 0) {
401 cout << "Enter NextBkgGeantEvent" << endl;}
402 // Clean previous event
403 if(fBkgGeantTK) delete fBkgGeantTK;
404 fBkgGeantTK = NULL;
405 if(fBkgGeantParticles) fBkgGeantParticles->Clear();
406 if(fBkgGeantTH) delete fBkgGeantTH;
407 fBkgGeantTH = NULL;
408 if(fBkgGeantHits) fBkgGeantHits->Clear();
409 // Increment event number
410 fBkgGeantEventNumber++;
411 // Get access to Particles and Hits for event from background file
412 if (fPrintLevel >= 2) {cout << "Before cd(Bkg)" << endl; gDirectory->Dump();}
413 fBkgGeantFile->cd();
414 if (fPrintLevel >= 2) {cout << "After cd(Bkg)" << endl; gDirectory->Dump();}
415 // Particles: TreeK for event and branch "Particles"
416 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
417 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
418 if (!fBkgGeantTK) {
419 if (fPrintLevel >= 0) {
420 cout << "Cannot find Kine Tree for background event: " <<
421 fBkgGeantEventNumber << endl;
422 cout << "Goes back to event 0" << endl;
423 }
424 fBkgGeantEventNumber = 0;
425 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
426 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
427 if (!fBkgGeantTK) {
428 cout << "ERROR: cannot find Kine Tree for background event: " <<
429 fBkgGeantEventNumber << endl;
430 exit(0);
431 }
432 }
433 if (fBkgGeantTK)
434 fBkgGeantTK->SetBranchAddress("Particles", &fBkgGeantParticles);
435 fBkgGeantTK->GetEvent(0); // why event 0 ???? necessary ????
436 // Hits: TreeH for event and branch "MUON"
437 sprintf(treeName, "TreeH%d", fBkgGeantEventNumber);
438 fBkgGeantTH = (TTree*)gDirectory->Get(treeName);
439 if (!fBkgGeantTH) {
440 cout << "ERROR: cannot find Hits Tree for background event: " <<
441 fBkgGeantEventNumber << endl;
442 exit(0);
443 }
444 if (fBkgGeantTH && fBkgGeantHits) {
445 branch = fBkgGeantTH->GetBranch("MUON");
446 if (branch) branch->SetAddress(&fBkgGeantHits);
447 }
448 fBkgGeantTH->GetEntries(); // necessary ????
449 // Back to the signal file
450 ((gAlice->TreeK())->GetCurrentFile())->cd();
451 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
452 return;
453}
454
455//__________________________________________________________________________
456void AliMUONEventReconstructor::EventReconstruct(void)
457{
458 // To reconstruct one event
459 if (fPrintLevel >= 1) cout << "enter EventReconstruct" << endl;
460 MakeEventToBeReconstructed();
461 MakeSegments();
462 MakeTracks();
463 return;
464}
465
466 //__________________________________________________________________________
467void AliMUONEventReconstructor::ResetHitsForRec(void)
468{
469 // To reset the array and the number of HitsForRec,
470 // and also the number of HitsForRec
471 // and the index of the first HitForRec per chamber
472 if (fHitsForRecPtr) fHitsForRecPtr->Clear();
473 fNHitsForRec = 0;
9cbdf048 474 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++)
a9e2aefa 475 fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0;
476 return;
477}
478
479 //__________________________________________________________________________
480void AliMUONEventReconstructor::ResetSegments(void)
481{
482 // To reset the TClonesArray of segments and the number of Segments
483 // for all stations
9cbdf048 484 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 485 if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear();
486 fNSegments[st] = 0;
487 }
488 return;
489}
490
491 //__________________________________________________________________________
492void AliMUONEventReconstructor::ResetTracks(void)
493{
494 // To reset the TClonesArray of reconstructed tracks
8429a5e4 495 if (fRecTracksPtr) fRecTracksPtr->Delete();
496 // Delete in order that the Track destructors are called,
497 // hence the space for the TClonesArray of pointers to TrackHit's is freed
a9e2aefa 498 fNRecTracks = 0;
499 return;
500}
501
8429a5e4 502 //__________________________________________________________________________
503void AliMUONEventReconstructor::ResetTrackHits(void)
504{
505 // To reset the TClonesArray of hits on reconstructed tracks
506 if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear();
507 fNRecTrackHits = 0;
508 return;
509}
510
a9e2aefa 511 //__________________________________________________________________________
512void AliMUONEventReconstructor::MakeEventToBeReconstructed(void)
513{
514 // To make the list of hits to be reconstructed,
515 // either from the GEANT hits or from the raw clusters
516 // according to the parameter set for the reconstructor
517 if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl;
518 ResetHitsForRec();
519 if (fRecGeantHits == 1) {
520 // Reconstruction from GEANT hits
521 // Back to the signal file
522 ((gAlice->TreeK())->GetCurrentFile())->cd();
523 // Signal hits
524 // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
525 // Security on MUON ????
526 AddHitsForRecFromGEANT(gAlice->TreeH());
527 // Background hits
528 AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits);
529 // Sort HitsForRec in increasing order with respect to chamber number
530 SortHitsForRecWithIncreasingChamber();
531 }
532 else {
533 // Reconstruction from raw clusters
534 // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
535 // Security on MUON ????
536 // TreeR assumed to be be "prepared" in calling function
537 // by "MUON->GetTreeR(nev)" ????
9cbdf048 538 TTree *treeR = gAlice->TreeR();
539 AddHitsForRecFromRawClusters(treeR);
a9e2aefa 540 // No sorting: it is done automatically in the previous function
541 }
542 if (fPrintLevel >= 10) {
543 cout << "end of MakeEventToBeReconstructed" << endl;
544 cout << "NHitsForRec: " << fNHitsForRec << endl;
9cbdf048 545 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 546 cout << "chamber(0...): " << ch
547 << " NHitsForRec: " << fNHitsForRecPerChamber[ch]
548 << " index(first HitForRec): " << fIndexOfFirstHitForRecPerChamber[ch]
549 << endl;
550 for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch];
551 hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch];
552 hit++) {
553 cout << "HitForRec index(0...): " << hit << endl;
554 ((*fHitsForRecPtr)[hit])->Dump();
555 }
556 }
557 }
558 return;
559}
560
561 //__________________________________________________________________________
562void AliMUONEventReconstructor::AddHitsForRecFromGEANT(TTree *TH)
563{
564 // To add to the list of hits for reconstruction
565 // the GEANT signal hits from a hit tree TH.
566 if (fPrintLevel >= 2)
567 cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl;
568 if (TH == NULL) return;
9cbdf048 569 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 570 // Security on MUON ????
571 // See whether it could be the same for signal and background ????
572 // Loop over tracks in tree
573 Int_t ntracks = (Int_t) TH->GetEntries();
574 if (fPrintLevel >= 2)
575 cout << "ntracks: " << ntracks << endl;
576 for (Int_t track = 0; track < ntracks; track++) {
577 gAlice->ResetHits();
578 TH->GetEvent(track);
579 // Loop over hits
580 Int_t hit = 0;
9cbdf048 581 for (AliMUONHit* mHit = (AliMUONHit*) pMUON->FirstHit(-1);
a9e2aefa 582 mHit;
9cbdf048 583 mHit = (AliMUONHit*) pMUON->NextHit(), hit++) {
a9e2aefa 584 NewHitForRecFromGEANT(mHit,track, hit, 1);
585 } // end of hit loop
586 } // end of track loop
587 return;
588}
589
590 //__________________________________________________________________________
591void AliMUONEventReconstructor::AddHitsForRecFromBkgGEANT(TTree *TH, TClonesArray *Hits)
592{
593 // To add to the list of hits for reconstruction
594 // the GEANT background hits from a hit tree TH and a pointer Hits to a hit list.
595 // How to have only one function "AddHitsForRecFromGEANT" ????
596 if (fPrintLevel >= 2)
597 cout << "enter AddHitsForRecFromBkgGEANT with TH: " << TH << endl;
598 if (TH == NULL) return;
599 // Loop over tracks in tree
600 Int_t ntracks = (Int_t) TH->GetEntries();
601 if (fPrintLevel >= 2)
602 cout << "ntracks: " << ntracks << endl;
603 for (Int_t track = 0; track < ntracks; track++) {
604 if (Hits) Hits->Clear();
605 TH->GetEvent(track);
606 // Loop over hits
607 for (Int_t hit = 0; hit < Hits->GetEntriesFast(); hit++) {
608 NewHitForRecFromGEANT((AliMUONHit*) (*Hits)[hit], track, hit, 0);
609 } // end of hit loop
610 } // end of track loop
611 return;
612}
613
614 //__________________________________________________________________________
615AliMUONHitForRec* AliMUONEventReconstructor::NewHitForRecFromGEANT(AliMUONHit* Hit, Int_t TrackNumber, Int_t HitNumber, Int_t Signal)
616{
617 // To make a new hit for reconstruction from a GEANT hit pointed to by "Hit",
618 // with hit number "HitNumber" in the track numbered "TrackNumber",
619 // either from signal ("Signal" = 1) or background ("Signal" = 0) event.
620 // Selects hits in tracking (not trigger) chambers.
621 // Takes into account the efficiency (fEfficiency)
622 // and the smearing from resolution (fBendingResolution and fNonBendingResolution).
623 // Adds a condition on the radius between RMin and RMax
624 // to better simulate the real chambers.
625 // Returns the pointer to the new hit for reconstruction,
626 // or NULL in case of inefficiency or non tracking chamber or bad radius.
627 // No condition on at most 20 cm from a muon from a resonance
628 // like in Fortran TRACKF_STAT.
629 AliMUONHitForRec* hitForRec;
630 Double_t bendCoor, nonBendCoor, radius;
0a5f36d9 631 Int_t chamber = Hit->Chamber() - 1; // chamber(0...)
a9e2aefa 632 // only in tracking chambers (fChamber starts at 1)
9cbdf048 633 if (chamber >= kMaxMuonTrackingChambers) return NULL;
a9e2aefa 634 // only if hit is efficient (keep track for checking ????)
635 if (gRandom->Rndm() > fEfficiency) return NULL;
636 // only if radius between RMin and RMax
94de3818 637 bendCoor = Hit->Y();
638 nonBendCoor = Hit->X();
a9e2aefa 639 radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor));
d0bfce8d 640 // This cut is not needed with a realistic chamber geometry !!!!
641// if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL;
a9e2aefa 642 // new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's
643 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit);
644 fNHitsForRec++;
645 // add smearing from resolution
646 hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution));
647 hitForRec->SetNonBendingCoor(nonBendCoor
648 + gRandom->Gaus(0., fNonBendingResolution));
d0bfce8d 649// // !!!! without smearing
650// hitForRec->SetBendingCoor(bendCoor);
651// hitForRec->SetNonBendingCoor(nonBendCoor);
a9e2aefa 652 // more information into HitForRec
653 // resolution: angular effect to be added here ????
654 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
655 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
656 // GEANT track info
657 hitForRec->SetHitNumber(HitNumber);
658 hitForRec->SetTHTrack(TrackNumber);
659 hitForRec->SetGeantSignal(Signal);
660 if (fPrintLevel >= 10) {
661 cout << "track: " << TrackNumber << " hit: " << HitNumber << endl;
662 Hit->Dump();
663 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
664 hitForRec->Dump();}
665 return hitForRec;
666}
667
668 //__________________________________________________________________________
669void AliMUONEventReconstructor::SortHitsForRecWithIncreasingChamber()
670{
671 // Sort HitsForRec's in increasing order with respect to chamber number.
672 // Uses the function "Compare".
673 // Update the information for HitsForRec per chamber too.
674 Int_t ch, nhits, prevch;
675 fHitsForRecPtr->Sort();
9cbdf048 676 for (ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 677 fNHitsForRecPerChamber[ch] = 0;
678 fIndexOfFirstHitForRecPerChamber[ch] = 0;
679 }
680 prevch = 0; // previous chamber
681 nhits = 0; // number of hits in current chamber
682 // Loop over HitsForRec
683 for (Int_t hit = 0; hit < fNHitsForRec; hit++) {
684 // chamber number (0...)
685 ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber();
686 // increment number of hits in current chamber
687 (fNHitsForRecPerChamber[ch])++;
688 // update index of first HitForRec in current chamber
689 // if chamber number different from previous one
690 if (ch != prevch) {
691 fIndexOfFirstHitForRecPerChamber[ch] = hit;
692 prevch = ch;
693 }
694 }
695 return;
696}
697
698// //__________________________________________________________________________
699// void AliMUONEventReconstructor::AddHitsForRecFromCathodeCorrelations(TTree* TC)
700// {
701// // OLD VERSION WHEN ONE ONE WAS USING SO CALLED CATHODE CORRELATIONS
702// // To add to the list of hits for reconstruction
703// // the (cathode correlated) raw clusters
704// // No condition added, like in Fortran TRACKF_STAT,
705// // on the radius between RMin and RMax.
706// AliMUONHitForRec *hitForRec;
707// if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromCathodeCorrelations" << endl;
708// AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
709// // Security on MUON ????
710// // Loop over tracking chambers
9cbdf048 711// for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 712// // number of HitsForRec to 0 for the chamber
713// fNHitsForRecPerChamber[ch] = 0;
714// // index of first HitForRec for the chamber
715// if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
716// else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
717// TClonesArray *reconst_hits = MUON->ReconstHitsAddress(ch);
718// MUON->ResetReconstHits();
719// TC->GetEvent();
720// Int_t ncor = (Int_t)reconst_hits->GetEntries();
721// // Loop over (cathode correlated) raw clusters
722// for (Int_t cor = 0; cor < ncor; cor++) {
723// AliMUONReconstHit * mCor =
724// (AliMUONReconstHit*) reconst_hits->UncheckedAt(cor);
725// // new AliMUONHitForRec from (cathode correlated) raw cluster
726// // and increment number of AliMUONHitForRec's (total and in chamber)
727// hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(mCor);
728// fNHitsForRec++;
729// (fNHitsForRecPerChamber[ch])++;
730// // more information into HitForRec
731// hitForRec->SetChamberNumber(ch);
732// hitForRec->SetHitNumber(cor);
733// // Z coordinate of the chamber (cm) with sign opposite to GEANT sign
734// // could (should) be more exact from chamber geometry ????
735// hitForRec->SetZ(-(&(MUON->Chamber(ch)))->Z());
736// if (fPrintLevel >= 10) {
737// cout << "chamber (0...): " << ch <<
738// " cathcorrel (0...): " << cor << endl;
739// mCor->Dump();
740// cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
741// hitForRec->Dump();}
742// } // end of cluster loop
743// } // end of chamber loop
744// return;
745// }
746
747 //__________________________________________________________________________
748void AliMUONEventReconstructor::AddHitsForRecFromRawClusters(TTree* TR)
749{
750 // To add to the list of hits for reconstruction all the raw clusters
751 // No condition added, like in Fortran TRACKF_STAT,
752 // on the radius between RMin and RMax.
753 AliMUONHitForRec *hitForRec;
754 AliMUONRawCluster *clus;
755 Int_t iclus, nclus;
756 TClonesArray *rawclusters;
757 if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl;
9cbdf048 758 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 759 // Security on MUON ????
760 // Loop over tracking chambers
9cbdf048 761 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 762 // number of HitsForRec to 0 for the chamber
763 fNHitsForRecPerChamber[ch] = 0;
764 // index of first HitForRec for the chamber
765 if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
766 else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
9cbdf048 767 rawclusters = pMUON->RawClustAddress(ch);
768 pMUON->ResetRawClusters();
a9e2aefa 769 TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ????
770 nclus = (Int_t) (rawclusters->GetEntries());
771 // Loop over (cathode correlated) raw clusters
772 for (iclus = 0; iclus < nclus; iclus++) {
773 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus);
774 // new AliMUONHitForRec from raw cluster
775 // and increment number of AliMUONHitForRec's (total and in chamber)
776 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus);
777 fNHitsForRec++;
778 (fNHitsForRecPerChamber[ch])++;
779 // more information into HitForRec
780 // resolution: info should be already in raw cluster and taken from it ????
781 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
782 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
783 // original raw cluster
784 hitForRec->SetChamberNumber(ch);
785 hitForRec->SetHitNumber(iclus);
ba5b68db 786 // Z coordinate of the raw cluster (cm)
cfe0107f 787 hitForRec->SetZ(clus->fZ[0]);
a9e2aefa 788 if (fPrintLevel >= 10) {
789 cout << "chamber (0...): " << ch <<
790 " raw cluster (0...): " << iclus << endl;
791 clus->Dump();
792 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
793 hitForRec->Dump();}
794 } // end of cluster loop
795 } // end of chamber loop
796 return;
797}
798
799 //__________________________________________________________________________
800void AliMUONEventReconstructor::MakeSegments(void)
801{
802 // To make the list of segments in all stations,
803 // from the list of hits to be reconstructed
804 if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl;
805 ResetSegments();
806 // Loop over stations
9cbdf048 807 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 808 MakeSegmentsPerStation(st);
809 if (fPrintLevel >= 10) {
810 cout << "end of MakeSegments" << endl;
9cbdf048 811 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 812 cout << "station(0...): " << st
813 << " Segments: " << fNSegments[st]
814 << endl;
815 for (Int_t seg = 0;
816 seg < fNSegments[st];
817 seg++) {
818 cout << "Segment index(0...): " << seg << endl;
819 ((*fSegmentsPtr[st])[seg])->Dump();
820 }
821 }
822 }
823 return;
824}
825
826 //__________________________________________________________________________
827void AliMUONEventReconstructor::MakeSegmentsPerStation(Int_t Station)
828{
829 // To make the list of segments in station number "Station" (0...)
830 // from the list of hits to be reconstructed.
831 // Updates "fNSegments"[Station].
832 // Segments in stations 4 and 5 are sorted
833 // according to increasing absolute value of "impact parameter"
834 AliMUONHitForRec *hit1Ptr, *hit2Ptr;
835 AliMUONSegment *segment;
836 Bool_t last2st;
837 Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor,
d0bfce8d 838 impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings.
9cbdf048 839 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 840 if (fPrintLevel >= 1)
841 cout << "enter MakeSegmentsPerStation (0...) " << Station << endl;
842 // first and second chambers (0...) in the station
843 Int_t ch1 = 2 * Station;
844 Int_t ch2 = ch1 + 1;
845 // variable true for stations downstream of the dipole:
846 // Station(0..4) equal to 3 or 4
847 if ((Station == 3) || (Station == 4)) {
848 last2st = kTRUE;
849 // maximum impact parameter (cm) according to fMinBendingMomentum...
850 maxImpactParam =
851 TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum));
d0bfce8d 852 // minimum impact parameter (cm) according to fMaxBendingMomentum...
853 minImpactParam =
854 TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum));
a9e2aefa 855 }
856 else last2st = kFALSE;
857 // extrapolation factor from Z of first chamber to Z of second chamber
858 // dZ to be changed to take into account fine structure of chambers ????
859 Double_t extrapFact =
9cbdf048 860 (&(pMUON->Chamber(ch2)))->Z() / (&(pMUON->Chamber(ch1)))->Z();
a9e2aefa 861 // index for current segment
862 Int_t segmentIndex = 0;
863 // Loop over HitsForRec in the first chamber of the station
864 for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1];
865 hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1];
866 hit1++) {
867 // pointer to the HitForRec
868 hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]);
869 // extrapolation,
870 // on the straight line joining the HitForRec to the vertex (0,0,0),
871 // to the Z of the second chamber of the station
872 extBendCoor = extrapFact * hit1Ptr->GetBendingCoor();
873 extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor();
874 // Loop over HitsForRec in the second chamber of the station
875 for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2];
876 hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2];
877 hit2++) {
878 // pointer to the HitForRec
879 hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]);
880 // absolute values of distances, in bending and non bending planes,
881 // between the HitForRec in the second chamber
882 // and the previous extrapolation
883 distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor);
884 distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor);
885 if (last2st) {
886 // bending slope
887 bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) /
888 (hit1Ptr->GetZ() - hit2Ptr->GetZ());
889 // absolute value of impact parameter
890 impactParam =
891 TMath::Abs(hit1Ptr->GetBendingCoor() - hit2Ptr->GetZ() * bendingSlope);
892 }
893 // check for distances not too large,
894 // and impact parameter not too big if stations downstream of the dipole.
895 // Conditions "distBend" and "impactParam" correlated for these stations ????
896 if ((distBend < fSegmentMaxDistBending[Station]) &&
897 (distNonBend < fSegmentMaxDistNonBending[Station]) &&
d0bfce8d 898 (!last2st || (impactParam < maxImpactParam)) &&
899 (!last2st || (impactParam > minImpactParam))) {
a9e2aefa 900 // make new segment
901 segment = new ((*fSegmentsPtr[Station])[segmentIndex])
902 AliMUONSegment(hit1Ptr, hit2Ptr);
903 // update "link" to this segment from the hit in the first chamber
904 if (hit1Ptr->GetNSegments() == 0)
905 hit1Ptr->SetIndexOfFirstSegment(segmentIndex);
906 hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1);
907 if (fPrintLevel >= 10) {
908 cout << "segmentIndex(0...): " << segmentIndex
909 << " distBend: " << distBend
910 << " distNonBend: " << distNonBend
911 << endl;
912 segment->Dump();
913 cout << "HitForRec in first chamber" << endl;
914 hit1Ptr->Dump();
915 cout << "HitForRec in second chamber" << endl;
916 hit2Ptr->Dump();
917 };
918 // increment index for current segment
919 segmentIndex++;
920 }
921 } //for (Int_t hit2
922 } // for (Int_t hit1...
923 fNSegments[Station] = segmentIndex;
924 // Sorting according to "impact parameter" if station(1..5) 4 or 5,
925 // i.e. Station(0..4) 3 or 4, using the function "Compare".
926 // After this sorting, it is impossible to use
927 // the "fNSegments" and "fIndexOfFirstSegment"
928 // of the HitForRec in the first chamber to explore all segments formed with it.
929 // Is this sorting really needed ????
930 if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort();
931 if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: "
932 << fNSegments[Station] << endl;
933 return;
934}
935
936 //__________________________________________________________________________
937void AliMUONEventReconstructor::MakeTracks(void)
938{
939 // To make the tracks,
940 // from the list of segments and points in all stations
941 if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl;
8429a5e4 942 // The order may be important for the following Reset's
a9e2aefa 943 ResetTracks();
8429a5e4 944 ResetTrackHits();
a9e2aefa 945 // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
946 MakeTrackCandidates();
947 // Follow tracks in stations(1..) 3, 2 and 1
948 FollowTracks();
8429a5e4 949 // Remove double tracks
950 RemoveDoubleTracks();
a9e2aefa 951 return;
952}
953
954 //__________________________________________________________________________
955Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment)
956{
957 // To make track candidates with two segments in stations(1..) 4 and 5,
958 // the first segment being pointed to by "BegSegment".
959 // Returns the number of such track candidates.
960 Int_t endStation, iEndSegment, nbCan2Seg;
961 AliMUONSegment *endSegment, *extrapSegment;
962 AliMUONTrack *recTrack;
963 Double_t mcsFactor;
964 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl;
965 // Station for the end segment
966 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
967 // multiple scattering factor corresponding to one chamber
968 mcsFactor = 0.0136 /
969 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
970 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
971 // linear extrapolation to end station
972 extrapSegment =
973 BegSegment->CreateSegmentFromLinearExtrapToStation(endStation, mcsFactor);
974 // number of candidates with 2 segments to 0
975 nbCan2Seg = 0;
976 // Loop over segments in the end station
977 for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) {
978 // pointer to segment
979 endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]);
980 // test compatibility between current segment and "extrapSegment"
04b5ea16 981 // 4 because 4 quantities in chi2
a9e2aefa 982 if ((endSegment->
983 NormalizedChi2WithSegment(extrapSegment,
984 fMaxSigma2Distance)) <= 4.0) {
985 // both segments compatible:
986 // make track candidate from "begSegment" and "endSegment"
987 if (fPrintLevel >= 2)
988 cout << "TrackCandidate with Segment " << iEndSegment <<
989 " in Station(0..) " << endStation << endl;
990 // flag for both segments in one track:
991 // to be done in track constructor ????
992 BegSegment->SetInTrack(kTRUE);
993 endSegment->SetInTrack(kTRUE);
994 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
995 AliMUONTrack(BegSegment, endSegment, this);
996 fNRecTracks++;
997 if (fPrintLevel >= 10) recTrack->RecursiveDump();
998 // increment number of track candidates with 2 segments
999 nbCan2Seg++;
1000 }
1001 } // for (iEndSegment = 0;...
1002 delete extrapSegment; // should not delete HitForRec's it points to !!!!
1003 return nbCan2Seg;
1004}
1005
1006 //__________________________________________________________________________
1007Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment)
1008{
1009 // To make track candidates with one segment and one point
1010 // in stations(1..) 4 and 5,
1011 // the segment being pointed to by "BegSegment".
1012 Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit;
1013 AliMUONHitForRec *extrapHitForRec, *hit;
1014 AliMUONTrack *recTrack;
1015 Double_t mcsFactor;
1016 if (fPrintLevel >= 1)
1017 cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl;
1018 // station for the end point
1019 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1020 // multiple scattering factor corresponding to one chamber
1021 mcsFactor = 0.0136 /
1022 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1023 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1024 // first and second chambers(0..) in the end station
1025 ch1 = 2 * endStation;
1026 ch2 = ch1 + 1;
1027 // number of candidates to 0
1028 nbCan1Seg1Hit = 0;
1029 // Loop over chambers of the end station
1030 for (ch = ch2; ch >= ch1; ch--) {
1031 // linear extrapolation to chamber
1032 extrapHitForRec =
1033 BegSegment->CreateHitForRecFromLinearExtrapToChamber(ch, mcsFactor);
1034 // limits for the hit index in the loop
1035 iHitMin = fIndexOfFirstHitForRecPerChamber[ch];
1036 iHitMax = iHitMin + fNHitsForRecPerChamber[ch];
1037 // Loop over HitForRec's in the chamber
1038 for (iHit = iHitMin; iHit < iHitMax; iHit++) {
1039 // pointer to HitForRec
1040 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
1041 // test compatibility between current HitForRec and "extrapHitForRec"
04b5ea16 1042 // 2 because 2 quantities in chi2
a9e2aefa 1043 if ((hit->
1044 NormalizedChi2WithHitForRec(extrapHitForRec,
1045 fMaxSigma2Distance)) <= 2.0) {
1046 // both HitForRec's compatible:
1047 // make track candidate from begSegment and current HitForRec
1048 if (fPrintLevel >= 2)
1049 cout << "TrackCandidate with HitForRec " << iHit <<
1050 " in Chamber(0..) " << ch << endl;
1051 // flag for beginning segments in one track:
1052 // to be done in track constructor ????
1053 BegSegment->SetInTrack(kTRUE);
1054 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1055 AliMUONTrack(BegSegment, hit, this);
1056 // the right place to eliminate "double counting" ???? how ????
1057 fNRecTracks++;
1058 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1059 // increment number of track candidates
1060 nbCan1Seg1Hit++;
1061 }
1062 } // for (iHit = iHitMin;...
1063 delete extrapHitForRec;
1064 } // for (ch = ch2;...
1065 return nbCan1Seg1Hit;
1066}
1067
1068 //__________________________________________________________________________
1069void AliMUONEventReconstructor::MakeTrackCandidates(void)
1070{
1071 // To make track candidates
1072 // with at least 3 aligned points in stations(1..) 4 and 5
1073 // (two Segment's or one Segment and one HitForRec)
1074 Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg;
1075 AliMUONSegment *begSegment;
1076 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl;
1077 // Loop over stations(1..) 5 and 4 for the beginning segment
1078 for (begStation = 4; begStation > 2; begStation--) {
1079 // Loop over segments in the beginning station
1080 for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) {
1081 // pointer to segment
1082 begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]);
1083 if (fPrintLevel >= 2)
1084 cout << "look for TrackCandidate's with Segment " << iBegSegment <<
1085 " in Station(0..) " << begStation << endl;
1086 // Look for track candidates with two segments,
1087 // "begSegment" and all compatible segments in other station.
1088 // Only for beginning station(1..) 5
1089 // because candidates with 2 segments have to looked for only once.
1090 if (begStation == 4)
1091 nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment);
956019b6 1092 // Look for track candidates with one segment and one point,
a9e2aefa 1093 // "begSegment" and all compatible HitForRec's in other station.
1094 // Only if "begSegment" does not belong already to a track candidate.
1095 // Is that a too strong condition ????
1096 if (!(begSegment->GetInTrack()))
1097 nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment);
1098 } // for (iBegSegment = 0;...
1099 } // for (begStation = 4;...
1100 return;
1101}
1102
1103 //__________________________________________________________________________
1104void AliMUONEventReconstructor::FollowTracks(void)
1105{
1106 // Follow tracks in stations(1..) 3, 2 and 1
04b5ea16 1107 // too long: should be made more modular !!!!
d0bfce8d 1108 AliMUONHitForRec *bestHit, *extrapHit, *extrapCorrHit, *hit;
1109 AliMUONSegment *bestSegment, *extrapSegment, *extrapCorrSegment, *segment;
04b5ea16 1110 AliMUONTrack *track, *nextTrack;
1111 AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex;
ecfa008b 1112 // -1 to avoid compilation warnings
1113 Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex;
04b5ea16 1114 Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor;
d0bfce8d 1115 Double_t bendingMomentum, chi2Norm = 0.;
9cbdf048 1116 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
04b5ea16 1117 // local maxSigma2Distance, for easy increase in testing
1118 maxSigma2Distance = fMaxSigma2Distance;
a9e2aefa 1119 if (fPrintLevel >= 2)
1120 cout << "enter FollowTracks" << endl;
1121 // Loop over track candidates
04b5ea16 1122 track = (AliMUONTrack*) fRecTracksPtr->First();
1123 trackIndex = -1;
1124 while (track) {
1125 // Follow function for each track candidate ????
1126 trackIndex++;
1127 nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track
a9e2aefa 1128 if (fPrintLevel >= 2)
1129 cout << "FollowTracks: track candidate(0..): " << trackIndex << endl;
956019b6 1130 // Fit track candidate
1131 track->SetFitMCS(0); // without multiple Coulomb scattering
1132 track->SetFitNParam(3); // with 3 parameters (X = Y = 0)
1133 track->SetFitStart(0); // from parameters at vertex
1134 track->Fit();
a9e2aefa 1135 if (fPrintLevel >= 10) {
1136 cout << "FollowTracks: track candidate(0..): " << trackIndex
956019b6 1137 << " after fit in stations(0..) 3 and 4" << endl;
a9e2aefa 1138 track->RecursiveDump();
1139 }
1140 // Loop over stations(1..) 3, 2 and 1
04b5ea16 1141 // something SPECIAL for stations 2 and 1 for majority 3 coincidence ????
1142 // otherwise: majority coincidence 2 !!!!
a9e2aefa 1143 for (station = 2; station >= 0; station--) {
1144 // Track parameters at first track hit (smallest Z)
1145 trackParam1 = ((AliMUONTrackHit*)
1146 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1147 // extrapolation to station
1148 trackParam1->ExtrapToStation(station, trackParam);
79e1e601 1149 extrapSegment = new AliMUONSegment(); // empty segment
d0bfce8d 1150 extrapCorrSegment = new AliMUONSegment(); // empty corrected segment
a9e2aefa 1151 // multiple scattering factor corresponding to one chamber
1152 // and momentum in bending plane (not total)
1153 mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum();
1154 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1155 // Z difference from previous station
9cbdf048 1156 dZ1 = (&(pMUON->Chamber(2 * station)))->Z() -
1157 (&(pMUON->Chamber(2 * station + 2)))->Z();
a9e2aefa 1158 // Z difference between the two previous stations
9cbdf048 1159 dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() -
1160 (&(pMUON->Chamber(2 * station + 4)))->Z();
04b5ea16 1161 // Z difference between the two chambers in the previous station
1162 dZ3 = (&(pMUON->Chamber(2 * station)))->Z() -
1163 (&(pMUON->Chamber(2 * station + 1)))->Z();
1164 extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1165 extrapSegment->
1166 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1167 extrapSegment->UpdateFromStationTrackParam
1168 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1169 trackParam1->GetInverseBendingMomentum());
d0bfce8d 1170 // same thing for corrected segment
1171 // better to use copy constructor, after checking that it works properly !!!!
1172 extrapCorrSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1173 extrapCorrSegment->
1174 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1175 extrapCorrSegment->UpdateFromStationTrackParam
1176 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1177 trackParam1->GetInverseBendingMomentum());
a9e2aefa 1178 bestChi2 = 5.0;
1179 bestSegment = NULL;
1180 if (fPrintLevel >= 10) {
1181 cout << "FollowTracks: track candidate(0..): " << trackIndex
1182 << " Look for segment in station(0..): " << station << endl;
1183 }
1184 // Loop over segments in station
1185 for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) {
1186 // Look for best compatible Segment in station
1187 // should consider all possibilities ????
1188 // multiple scattering ????
1189 // separation in 2 functions: Segment and HitForRec ????
1190 segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]);
d0bfce8d 1191 // correction of corrected segment (fBendingCoor and fNonBendingCoor)
1192 // according to real Z value of "segment" and slopes of "extrapSegment"
1193 extrapCorrSegment->
1194 SetBendingCoor(extrapSegment->GetBendingCoor() +
1195 extrapSegment->GetBendingSlope() *
1196 (segment->GetHitForRec1()->GetZ() -
1197 (&(pMUON->Chamber(2 * station)))->Z()));
1198 extrapCorrSegment->
1199 SetNonBendingCoor(extrapSegment->GetNonBendingCoor() +
1200 extrapSegment->GetNonBendingSlope() *
1201 (segment->GetHitForRec1()->GetZ() -
1202 (&(pMUON->Chamber(2 * station)))->Z()));
1203 chi2 = segment->
1204 NormalizedChi2WithSegment(extrapCorrSegment, maxSigma2Distance);
a9e2aefa 1205 if (chi2 < bestChi2) {
1206 // update best Chi2 and Segment if better found
1207 bestSegment = segment;
1208 bestChi2 = chi2;
1209 }
1210 }
1211 if (bestSegment) {
1212 // best segment found: add it to track candidate
1213 track->AddSegment(bestSegment);
1214 // set track parameters at these two TrakHit's
1215 track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0]));
1216 track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1]));
1217 if (fPrintLevel >= 10) {
1218 cout << "FollowTracks: track candidate(0..): " << trackIndex
1219 << " Added segment in station(0..): " << station << endl;
1220 track->RecursiveDump();
1221 }
1222 }
1223 else {
1224 // No best segment found:
1225 // Look for best compatible HitForRec in station:
1226 // should consider all possibilities ????
1227 // multiple scattering ???? do about like for extrapSegment !!!!
79e1e601 1228 extrapHit = new AliMUONHitForRec(); // empty hit
d0bfce8d 1229 extrapCorrHit = new AliMUONHitForRec(); // empty corrected hit
a9e2aefa 1230 bestChi2 = 3.0;
1231 bestHit = NULL;
1232 if (fPrintLevel >= 10) {
1233 cout << "FollowTracks: track candidate(0..): " << trackIndex
1234 << " Segment not found, look for hit in station(0..): " << station
1235 << endl;
1236 }
1237 // Loop over chambers of the station
d82671a0 1238 for (chInStation = 0; chInStation < 2; chInStation++) {
a9e2aefa 1239 // coordinates of extrapolated hit
d82671a0 1240 extrapHit->
1241 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1242 extrapHit->
1243 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
a9e2aefa 1244 // resolutions from "extrapSegment"
1245 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1246 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
d0bfce8d 1247 // same things for corrected hit
1248 // better to use copy constructor, after checking that it works properly !!!!
1249 extrapCorrHit->
1250 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1251 extrapCorrHit->
1252 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
1253 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1254 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
a9e2aefa 1255 // Loop over hits in the chamber
956019b6 1256 ch = 2 * station + chInStation;
a9e2aefa 1257 for (iHit = fIndexOfFirstHitForRecPerChamber[ch];
1258 iHit < fIndexOfFirstHitForRecPerChamber[ch] +
1259 fNHitsForRecPerChamber[ch];
1260 iHit++) {
1261 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
d0bfce8d 1262 // correction of corrected hit (fBendingCoor and fNonBendingCoor)
1263 // according to real Z value of "hit" and slopes of right "trackParam"
1264 extrapCorrHit->
1265 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor() +
1266 (&(trackParam[chInStation]))->GetBendingSlope() *
1267 (hit->GetZ() -
1268 (&(trackParam[chInStation]))->GetZ()));
1269 extrapCorrHit->
1270 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor() +
1271 (&(trackParam[chInStation]))->GetNonBendingSlope() *
1272 (hit->GetZ() -
1273 (&(trackParam[chInStation]))->GetZ()));
a9e2aefa 1274 // condition for hit not already in segment ????
1275 chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance);
1276 if (chi2 < bestChi2) {
1277 // update best Chi2 and HitForRec if better found
1278 bestHit = hit;
1279 bestChi2 = chi2;
d82671a0 1280 chBestHit = chInStation;
a9e2aefa 1281 }
1282 }
1283 }
1284 if (bestHit) {
1285 // best hit found: add it to track candidate
1286 track->AddHitForRec(bestHit);
956019b6 1287 // set track parameters at this TrackHit
a9e2aefa 1288 track->SetTrackParamAtHit(track->GetNTrackHits() - 1,
1289 &(trackParam[chBestHit]));
1290 if (fPrintLevel >= 10) {
1291 cout << "FollowTracks: track candidate(0..): " << trackIndex
1292 << " Added hit in station(0..): " << station << endl;
1293 track->RecursiveDump();
1294 }
1295 }
1296 else {
8429a5e4 1297 // Remove current track candidate
1298 // and corresponding TrackHit's, ...
1299 track->Remove();
04b5ea16 1300 delete extrapSegment;
d0bfce8d 1301 delete extrapCorrSegment;
1302 delete extrapHit;
1303 delete extrapCorrHit;
a9e2aefa 1304 break; // stop the search for this candidate:
1305 // exit from the loop over station
1306 }
d0bfce8d 1307 delete extrapHit;
1308 delete extrapCorrHit;
a9e2aefa 1309 }
04b5ea16 1310 delete extrapSegment;
d0bfce8d 1311 delete extrapCorrSegment;
a9e2aefa 1312 // Sort track hits according to increasing Z
1313 track->GetTrackHitsPtr()->Sort();
1314 // Update track parameters at first track hit (smallest Z)
1315 trackParam1 = ((AliMUONTrackHit*)
1316 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
d0bfce8d 1317 bendingMomentum = 0.;
1318 if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.)
1319 bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum()));
1320 // Track removed if bendingMomentum not in window [min, max]
1321 if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) {
1322 track->Remove();
1323 break; // stop the search for this candidate:
1324 // exit from the loop over station
1325 }
956019b6 1326 // Track fit
04b5ea16 1327 // with multiple Coulomb scattering if all stations
1328 if (station == 0) track->SetFitMCS(1);
956019b6 1329 // without multiple Coulomb scattering if not all stations
04b5ea16 1330 else track->SetFitMCS(0);
956019b6 1331 track->SetFitNParam(5); // with 5 parameters (momentum and position)
1332 track->SetFitStart(1); // from parameters at first hit
1333 track->Fit();
d0bfce8d 1334 Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5);
1335 if (numberOfDegFree > 0) {
1336 chi2Norm = track->GetFitFMin() / numberOfDegFree;
1337 } else {
1338 chi2Norm = 1.e10;
1339 }
1340 // Track removed if normalized chi2 too high
1341 if (chi2Norm > fMaxChi2) {
1342 track->Remove();
1343 break; // stop the search for this candidate:
1344 // exit from the loop over station
1345 }
a9e2aefa 1346 if (fPrintLevel >= 10) {
1347 cout << "FollowTracks: track candidate(0..): " << trackIndex
1348 << " after fit from station(0..): " << station << " to 4" << endl;
1349 track->RecursiveDump();
1350 }
04b5ea16 1351 // Track extrapolation to the vertex through the absorber (Branson)
956019b6 1352 // after going through the first station
04b5ea16 1353 if (station == 0) {
1354 trackParamVertex = *trackParam1;
1355 (&trackParamVertex)->ExtrapToVertex();
1356 track->SetTrackParamAtVertex(&trackParamVertex);
6ae236ee 1357 if (fPrintLevel >= 1) {
1358 cout << "FollowTracks: track candidate(0..): " << trackIndex
1359 << " after extrapolation to vertex" << endl;
1360 track->RecursiveDump();
1361 }
04b5ea16 1362 }
a9e2aefa 1363 } // for (station = 2;...
04b5ea16 1364 // go really to next track
1365 track = nextTrack;
1366 } // while (track)
1367 // Compression of track array (necessary after Remove ????)
1368 fRecTracksPtr->Compress();
1369 return;
1370}
1371
1372 //__________________________________________________________________________
8429a5e4 1373void AliMUONEventReconstructor::RemoveDoubleTracks(void)
1374{
1375 // To remove double tracks.
1376 // Tracks are considered identical
1377 // if they have at least half of their hits in common.
1378 // Among two identical tracks, one keeps the track with the larger number of hits
1379 // or, if these numbers are equal, the track with the minimum Chi2.
1380 AliMUONTrack *track1, *track2, *trackToRemove;
1381 Bool_t identicalTracks;
1382 Int_t hitsInCommon, nHits1, nHits2;
1383 identicalTracks = kTRUE;
1384 while (identicalTracks) {
1385 identicalTracks = kFALSE;
1386 // Loop over first track of the pair
1387 track1 = (AliMUONTrack*) fRecTracksPtr->First();
1388 while (track1 && (!identicalTracks)) {
1389 nHits1 = track1->GetNTrackHits();
1390 // Loop over second track of the pair
1391 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1392 while (track2 && (!identicalTracks)) {
1393 nHits2 = track2->GetNTrackHits();
1394 // number of hits in common between two tracks
1395 hitsInCommon = track1->HitsInCommon(track2);
1396 // check for identical tracks
1397 if ((4 * hitsInCommon) >= (nHits1 + nHits2)) {
1398 identicalTracks = kTRUE;
1399 // decide which track to remove
1400 if (nHits1 > nHits2) trackToRemove = track2;
1401 else if (nHits1 < nHits2) trackToRemove = track1;
1402 else if ((track1->GetFitFMin()) < (track2->GetFitFMin()))
1403 trackToRemove = track2;
1404 else trackToRemove = track1;
1405 // remove it
1406 trackToRemove->Remove();
1407 }
1408 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
1409 } // track2
1410 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1411 } // track1
1412 }
1413 return;
1414}
1415
1416 //__________________________________________________________________________
04b5ea16 1417void AliMUONEventReconstructor::EventDump(void)
1418{
1419 // Dump reconstructed event (track parameters at vertex and at first hit),
1420 // and the particle parameters
1421
1422 AliMUONTrack *track;
1423 AliMUONTrackParam *trackParam, *trackParam1;
04b5ea16 1424 TParticle *p;
1425 Double_t bendingSlope, nonBendingSlope, pYZ;
1426 Double_t pX, pY, pZ, x, y, z, c;
1427 Int_t np, trackIndex, nTrackHits;
1428
1429 if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl;
1430 if (fPrintLevel >= 1) {
1431 cout << " Number of Reconstructed tracks :" << fNRecTracks << endl;
1432 }
1433 fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole
1434 // Loop over reconstructed tracks
1435 for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) {
1436 if (fPrintLevel >= 1)
1437 cout << " track number: " << trackIndex << endl;
1438 // function for each track for modularity ????
1439 track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]);
1440 nTrackHits = track->GetNTrackHits();
1441 if (fPrintLevel >= 1)
1442 cout << " number of track hits: " << nTrackHits << endl;
1443 // track parameters at Vertex
1444 trackParam = track->GetTrackParamAtVertex();
1445 x = trackParam->GetNonBendingCoor();
1446 y = trackParam->GetBendingCoor();
1447 z = trackParam->GetZ();
1448 bendingSlope = trackParam->GetBendingSlope();
1449 nonBendingSlope = trackParam->GetNonBendingSlope();
1450 pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
1451 pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope);
1452 pX = pZ * nonBendingSlope;
1453 pY = pZ * bendingSlope;
1454 c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum());
1455 if (fPrintLevel >= 1)
1456 printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1457 z, x, y, pX, pY, pZ, c);
1458
1459 // track parameters at first hit
1460 trackParam1 = ((AliMUONTrackHit*)
1461 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1462 x = trackParam1->GetNonBendingCoor();
1463 y = trackParam1->GetBendingCoor();
1464 z = trackParam1->GetZ();
1465 bendingSlope = trackParam1->GetBendingSlope();
1466 nonBendingSlope = trackParam1->GetNonBendingSlope();
1467 pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum());
1468 pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope);
1469 pX = pZ * nonBendingSlope;
1470 pY = pZ * bendingSlope;
1471 c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum());
1472 if (fPrintLevel >= 1)
1473 printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1474 z, x, y, pX, pY, pZ, c);
1475 }
1476 // informations about generated particles
2ab0c725 1477 np = gAlice->GetNtrack();
04b5ea16 1478 printf(" **** number of generated particles: %d \n", np);
1479
1480 for (Int_t iPart = 0; iPart < np; iPart++) {
2ab0c725 1481 p = gAlice->Particle(iPart);
04b5ea16 1482 printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n",
1483 iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode());
1484 }
a9e2aefa 1485 return;
1486}
1487
c7ba256d 1488void AliMUONEventReconstructor::FillEvent()
1489{
1490// Create a new AliMUONRecoEvent, fill its track list, then add it as a
1491// leaf in the Event branch of TreeRecoEvent tree
1492 cout << "Enter FillEvent() ...\n";
1493
1494 if (!fRecoEvent) {
1495 fRecoEvent = new AliMUONRecoEvent();
1496 } else {
1497 fRecoEvent->Clear();
1498 }
1499 //save current directory
1500 TDirectory *current = gDirectory;
1501 if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE");
1502 if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events");
1503 if (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) {
1504 if (fPrintLevel > 1) fRecoEvent->EventInfo();
1505 TBranch *branch = fEventTree->GetBranch("Event");
1506 if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000,1);
1507 branch->SetAutoDelete();
1508 fTreeFile->cd();
1509 fEventTree->Fill();
1510 fTreeFile->Write();
1511 }
1512 // restore directory
1513 current->cd();
1514}