]> 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
Made some, mostly cosmetic, changes to SDD simulation. Improved complience with
[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$Log$
d0f40f23 18Revision 1.26 2001/05/03 08:11:31 hristov
19stdlib.h included to define exit()
20
82a4bc7b 21Revision 1.25 2001/04/25 14:50:42 gosset
22Corrections to violations of coding conventions
23
3831f268 24Revision 1.24 2001/03/30 09:37:58 gosset
25Initialisations of pointers... for GEANT background events in the constructor
26
47a6b602 27Revision 1.23 2001/01/26 21:44:45 morsch
28Use access functions to AliMUONDigit, ... member data.
29
0a5f36d9 30Revision 1.22 2001/01/26 20:00:53 hristov
31Major upgrade of AliRoot code
3f5cf0b3 32Revision 1.20 2001/01/08 11:01:02 gosset
33Modifications used for addendum to Dimuon TDR (JP Cussonneau):
34*. MaxBendingMomentum to make both a segment and a track (default 500)
35*. MaxChi2 per degree of freedom to make a track (default 100)
36*. MinBendingMomentum used also to make a track
37 and not only a segment (default 3)
38*. wider roads for track search in stations 1 to 3
39*. extrapolation to actual Z instead of Z(chamber) in FollowTracks
40*. in track fit:
41 - limits on parameters X and Y (+/-500)
42 - covariance matrices in double precision
43 - normalization of covariance matrices before inversion
44 - suppression of Minuit printouts
45*. correction against memory leak (delete extrapHit) in FollowTracks
46*. RMax to 10 degrees with Z(chamber) instead of fixed values;
47 RMin and Rmax cuts suppressed in NewHitForRecFromGEANT,
48 because useless with realistic geometry
49
d0bfce8d 50Revision 1.19 2000/11/20 11:24:10 gosset
51New package for reconstructed tracks (A. Gheata):
52* tree output in the file "tree_reco.root"
53* display events and make histograms from this file
54
c7ba256d 55Revision 1.18 2000/10/26 12:47:03 gosset
56Real distance between chambers of each station taken into account
57for the reconstruction parameters "fSegmentMaxDistBending[5]"
58
860cef81 59Revision 1.17 2000/10/24 09:26:20 gosset
60Comments updated
61
ba5b68db 62Revision 1.16 2000/10/24 09:22:35 gosset
63Method AddHitsForRecFromRawClusters: real Z of raw cluster and not Z of chamber
64
cfe0107f 65Revision 1.15 2000/10/12 15:17:30 gosset
66Sign of fSimpleBValue corrected: sign ox Bx and not Bz (thanks to Galina)
67
065bd0e1 68Revision 1.14 2000/10/04 18:21:26 morsch
69Include stdlib.h
70
e7d455d5 71Revision 1.13 2000/10/02 21:28:09 fca
72Removal of useless dependecies via forward declarations
73
94de3818 74Revision 1.12 2000/10/02 16:58:29 egangler
75Cleaning of the code :
76-> coding conventions
77-> void Streamers
78-> some useless includes removed or replaced by "class" statement
79
ecfa008b 80Revision 1.11 2000/09/22 09:16:33 hristov
81Casting needed on DEC
82
8832c7b4 83Revision 1.10 2000/09/19 09:49:50 gosset
84AliMUONEventReconstructor package
85* track extrapolation independent from reco_muon.F, use of AliMagF...
86* possibility to use new magnetic field (automatic from generated root file)
87
a6f03ddb 88Revision 1.9 2000/07/20 12:45:27 gosset
89New "EventReconstructor..." structure,
90 hopefully more adapted to tree/streamer.
91"AliMUONEventReconstructor::RemoveDoubleTracks"
92 to keep only one track among similar ones.
93
8429a5e4 94Revision 1.8 2000/07/18 16:04:06 gosset
95AliMUONEventReconstructor package:
96* a few minor modifications and more comments
97* a few corrections
98 * right sign for Z of raw clusters
99 * right loop over chambers inside station
100 * symmetrized covariance matrix for measurements (TrackChi2MCS)
101 * right sign of charge in extrapolation (ExtrapToZ)
102 * right zEndAbsorber for Branson correction below 3 degrees
103* use of TVirtualFitter instead of TMinuit for AliMUONTrack::Fit
104* no parameter for AliMUONTrack::Fit() but more fit parameters in Track object
105
956019b6 106Revision 1.7 2000/07/03 12:28:06 gosset
107Printout at the right place after extrapolation to vertex
108
6ae236ee 109Revision 1.6 2000/06/30 12:01:06 gosset
110Correction for hit search in the right chamber (JPC)
111
d82671a0 112Revision 1.5 2000/06/30 10:15:48 gosset
113Changes to EventReconstructor...:
114precision fit with multiple Coulomb scattering;
115extrapolation to vertex with Branson correction in absorber (JPC)
116
04b5ea16 117Revision 1.4 2000/06/27 14:11:36 gosset
118Corrections against violations of coding conventions
119
9cbdf048 120Revision 1.3 2000/06/16 07:27:08 gosset
121To remove problem in running RuleChecker, like in MUON-dev
122
79e1e601 123Revision 1.1.2.5 2000/06/16 07:00:26 gosset
124To remove problem in running RuleChecker
125
a9e2aefa 126Revision 1.1.2.4 2000/06/12 08:00:07 morsch
127Dummy streamer to solve CINT compilation problem (to be investigated !)
128
129Revision 1.1.2.3 2000/06/09 20:59:57 morsch
130Make includes consistent with new file structure.
131
132Revision 1.1.2.2 2000/06/09 12:58:05 gosset
133Removed comment beginnings in Log sections of .cxx files
134Suppressed most violations of coding rules
135
136Revision 1.1.2.1 2000/06/07 14:44:53 gosset
137Addition of files for track reconstruction in C++
138*/
139
3831f268 140////////////////////////////////////
a9e2aefa 141//
142// MUON event reconstructor in ALICE
143//
144// This class contains as data:
145// * the parameters for the event reconstruction
146// * a pointer to the array of hits to be reconstructed (the event)
147// * a pointer to the array of segments made with these hits inside each station
148// * a pointer to the array of reconstructed tracks
149//
150// It contains as methods, among others:
151// * MakeEventToBeReconstructed to build the array of hits to be reconstructed
152// * MakeSegments to build the segments
153// * MakeTracks to build the tracks
3831f268 154//
155////////////////////////////////////
a9e2aefa 156
3831f268 157#include <iostream.h> // for cout
82a4bc7b 158#include <stdlib.h> // for exit()
a9e2aefa 159
94de3818 160#include <TTree.h>
a9e2aefa 161
a9e2aefa 162#include "AliMUON.h"
3831f268 163#include "AliMUONChamber.h"
164#include "AliMUONEventReconstructor.h"
a9e2aefa 165#include "AliMUONHitForRec.h"
a9e2aefa 166#include "AliMUONRawCluster.h"
3831f268 167#include "AliMUONRecoEvent.h"
168#include "AliMUONSegment.h"
a9e2aefa 169#include "AliMUONTrack.h"
a9e2aefa 170#include "AliMUONTrackHit.h"
94de3818 171#include "AliMagF.h"
3831f268 172#include "AliRun.h" // for gAlice
a9e2aefa 173
a9e2aefa 174//************* Defaults parameters for reconstruction
9cbdf048 175static const Double_t kDefaultMinBendingMomentum = 3.0;
d0bfce8d 176static const Double_t kDefaultMaxBendingMomentum = 500.0;
177static const Double_t kDefaultMaxChi2 = 100.0;
9cbdf048 178static const Double_t kDefaultMaxSigma2Distance = 16.0;
179static const Double_t kDefaultBendingResolution = 0.01;
180static const Double_t kDefaultNonBendingResolution = 0.144;
181static const Double_t kDefaultChamberThicknessInX0 = 0.03;
a9e2aefa 182// Simple magnetic field:
183// Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG
184// Length and Position from reco_muon.F, with opposite sign:
185// Length = ZMAGEND-ZCOIL
186// Position = (ZMAGEND+ZCOIL)/2
187// to be ajusted differently from real magnetic field ????
9cbdf048 188static const Double_t kDefaultSimpleBValue = 7.0;
189static const Double_t kDefaultSimpleBLength = 428.0;
190static const Double_t kDefaultSimpleBPosition = 1019.0;
191static const Int_t kDefaultRecGeantHits = 0;
192static const Double_t kDefaultEfficiency = 0.95;
a9e2aefa 193
9cbdf048 194static const Int_t kDefaultPrintLevel = 0;
a9e2aefa 195
196ClassImp(AliMUONEventReconstructor) // Class implementation in ROOT context
197
198 //__________________________________________________________________________
199AliMUONEventReconstructor::AliMUONEventReconstructor(void)
200{
201 // Constructor for class AliMUONEventReconstructor
202 SetReconstructionParametersToDefaults();
203 // Memory allocation for the TClonesArray of hits for reconstruction
204 // Is 10000 the right size ????
205 fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000);
206 fNHitsForRec = 0; // really needed or GetEntriesFast sufficient ????
207 // Memory allocation for the TClonesArray's of segments in stations
208 // Is 2000 the right size ????
9cbdf048 209 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 210 fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000);
211 fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ????
212 }
213 // Memory allocation for the TClonesArray of reconstructed tracks
214 // Is 10 the right size ????
215 fRecTracksPtr = new TClonesArray("AliMUONTrack", 10);
216 fNRecTracks = 0; // really needed or GetEntriesFast sufficient ????
8429a5e4 217 // Memory allocation for the TClonesArray of hits on reconstructed tracks
218 // Is 100 the right size ????
219 fRecTrackHitsPtr = new TClonesArray("AliMUONTrack", 100);
220 fNRecTrackHits = 0; // really needed or GetEntriesFast sufficient ????
a9e2aefa 221
065bd0e1 222 // Sign of fSimpleBValue according to sign of Bx value at (50,50,950).
a6f03ddb 223 Float_t b[3], x[3];
224 x[0] = 50.; x[1] = 50.; x[2] = 950.;
225 gAlice->Field()->Field(x, b);
065bd0e1 226 fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]);
a6f03ddb 227 // See how to get fSimple(BValue, BLength, BPosition)
228 // automatically calculated from the actual magnetic field ????
a9e2aefa 229
230 if (fPrintLevel >= 0) {
a6f03ddb 231 cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump();
232 cout << endl << "Magnetic field from root file:" << endl;
233 gAlice->Field()->Dump();
234 cout << endl;
235 }
c7ba256d 236
47a6b602 237 // Initializions for GEANT background events
238 fBkgGeantFile = 0;
239 fBkgGeantTK = 0;
240 fBkgGeantParticles = 0;
241 fBkgGeantTH = 0;
242 fBkgGeantHits = 0;
243 fBkgGeantEventNumber = -1;
244
c7ba256d 245 // Initialize to 0 pointers to RecoEvent, tree and tree file
246 fRecoEvent = 0;
247 fEventTree = 0;
248 fTreeFile = 0;
249
a9e2aefa 250 return;
251}
252
9cbdf048 253AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& Reconstructor)
254{
255 // Dummy copy constructor
256}
257
258AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& Reconstructor)
259{
260 // Dummy assignment operator
261 return *this;
262}
263
a9e2aefa 264 //__________________________________________________________________________
265AliMUONEventReconstructor::~AliMUONEventReconstructor(void)
266{
267 // Destructor for class AliMUONEventReconstructor
c7ba256d 268 if (fTreeFile) {
269 fTreeFile->Close();
270 delete fTreeFile;
271 }
272// if (fEventTree) delete fEventTree;
273 if (fRecoEvent) delete fRecoEvent;
a9e2aefa 274 delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ????
9cbdf048 275 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 276 delete fSegmentsPtr[st]; // Correct destruction of everything ????
277 return;
278}
279
280 //__________________________________________________________________________
281void AliMUONEventReconstructor::SetReconstructionParametersToDefaults(void)
282{
283 // Set reconstruction parameters to default values
284 // Would be much more convenient with a structure (or class) ????
9cbdf048 285 fMinBendingMomentum = kDefaultMinBendingMomentum;
d0bfce8d 286 fMaxBendingMomentum = kDefaultMaxBendingMomentum;
287 fMaxChi2 = kDefaultMaxChi2;
9cbdf048 288 fMaxSigma2Distance = kDefaultMaxSigma2Distance;
a9e2aefa 289
9cbdf048 290 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON");
a9e2aefa 291 // ******** Parameters for making HitsForRec
292 // minimum radius,
293 // like in TRACKF_STAT:
294 // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3;
295 // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9
9cbdf048 296 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
297 if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
a9e2aefa 298 2.0 * TMath::Pi() / 180.0;
299 else fRMin[ch] = 30.0;
d0bfce8d 300 // maximum radius at 10 degrees and Z of chamber
301 fRMax[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
302 10.0 * TMath::Pi() / 180.0;
a9e2aefa 303 }
a9e2aefa 304
305 // ******** Parameters for making segments
306 // should be parametrized ????
307 // according to interval between chambers in a station ????
308 // Maximum distance in non bending plane
309 // 5 * 0.22 just to remember the way it was made in TRACKF_STAT
310 // SIGCUT*DYMAX(IZ)
9cbdf048 311 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 312 fSegmentMaxDistNonBending[st] = 5. * 0.22;
860cef81 313 // Maximum distance in bending plane:
314 // values from TRACKF_STAT, corresponding to (J psi 20cm),
315 // scaled to the real distance between chambers in a station
316 fSegmentMaxDistBending[0] = 1.5 *
317 ((&(pMUON->Chamber(1)))->Z() - (&(pMUON->Chamber(0)))->Z()) / 20.0;
318 fSegmentMaxDistBending[1] = 1.5 *
319 ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0;
320 fSegmentMaxDistBending[2] = 3.0 *
321 ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0;
322 fSegmentMaxDistBending[3] = 6.0 *
323 ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0;
324 fSegmentMaxDistBending[4] = 6.0 *
325 ((&(pMUON->Chamber(9)))->Z() - (&(pMUON->Chamber(8)))->Z()) / 20.0;
a9e2aefa 326
9cbdf048 327 fBendingResolution = kDefaultBendingResolution;
328 fNonBendingResolution = kDefaultNonBendingResolution;
329 fChamberThicknessInX0 = kDefaultChamberThicknessInX0;
330 fSimpleBValue = kDefaultSimpleBValue;
331 fSimpleBLength = kDefaultSimpleBLength;
332 fSimpleBPosition = kDefaultSimpleBPosition;
333 fRecGeantHits = kDefaultRecGeantHits;
334 fEfficiency = kDefaultEfficiency;
335 fPrintLevel = kDefaultPrintLevel;
a9e2aefa 336 return;
337}
338
339//__________________________________________________________________________
3831f268 340Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const
a9e2aefa 341{
342 // Returns impact parameter at vertex in bending plane (cm),
343 // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c),
344 // using simple values for dipole magnetic field.
065bd0e1 345 // The sign of "BendingMomentum" is the sign of the charge.
a9e2aefa 346 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
347 BendingMomentum);
348}
349
350//__________________________________________________________________________
3831f268 351Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const
a9e2aefa 352{
353 // Returns signed bending momentum in bending plane (GeV/c),
065bd0e1 354 // the sign being the sign of the charge for particles moving forward in Z,
a9e2aefa 355 // from the impact parameter "ImpactParam" at vertex in bending plane (cm),
356 // using simple values for dipole magnetic field.
a9e2aefa 357 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
358 ImpactParam);
359}
360
361//__________________________________________________________________________
362void AliMUONEventReconstructor::SetBkgGeantFile(Text_t *BkgGeantFileName)
363{
364 // Set background file ... for GEANT hits
365 // Must be called after having loaded the firts signal event
366 if (fPrintLevel >= 0) {
367 cout << "Enter SetBkgGeantFile with BkgGeantFileName ``"
368 << BkgGeantFileName << "''" << endl;}
369 if (strlen(BkgGeantFileName)) {
370 // BkgGeantFileName not empty: try to open the file
371 if (fPrintLevel >= 2) {cout << "Before File(Bkg)" << endl; gDirectory->Dump();}
372 fBkgGeantFile = new TFile(BkgGeantFileName);
373 if (fPrintLevel >= 2) {cout << "After File(Bkg)" << endl; gDirectory->Dump();}
374 if (fBkgGeantFile-> IsOpen()) {
375 if (fPrintLevel >= 0) {
376 cout << "Background for GEANT hits in file: ``" << BkgGeantFileName
377 << "'' successfully opened" << endl;}
378 }
379 else {
380 cout << "Background for GEANT hits in file: " << BkgGeantFileName << endl;
381 cout << "NOT FOUND: EXIT" << endl;
382 exit(0); // right instruction for exit ????
383 }
384 // Arrays for "particles" and "hits"
385 fBkgGeantParticles = new TClonesArray("TParticle", 200);
386 fBkgGeantHits = new TClonesArray("AliMUONHit", 2000);
387 // Event number to -1 for initialization
388 fBkgGeantEventNumber = -1;
389 // Back to the signal file:
390 // first signal event must have been loaded previously,
391 // otherwise, Segmentation violation at the next instruction
392 // How is it possible to do smething better ????
393 ((gAlice->TreeK())->GetCurrentFile())->cd();
394 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
395 }
396 return;
397}
398
399//__________________________________________________________________________
400void AliMUONEventReconstructor::NextBkgGeantEvent(void)
401{
402 // Get next event in background file for GEANT hits
403 // Goes back to event number 0 when end of file is reached
404 char treeName[20];
405 TBranch *branch;
406 if (fPrintLevel >= 0) {
407 cout << "Enter NextBkgGeantEvent" << endl;}
408 // Clean previous event
409 if(fBkgGeantTK) delete fBkgGeantTK;
410 fBkgGeantTK = NULL;
411 if(fBkgGeantParticles) fBkgGeantParticles->Clear();
412 if(fBkgGeantTH) delete fBkgGeantTH;
413 fBkgGeantTH = NULL;
414 if(fBkgGeantHits) fBkgGeantHits->Clear();
415 // Increment event number
416 fBkgGeantEventNumber++;
417 // Get access to Particles and Hits for event from background file
418 if (fPrintLevel >= 2) {cout << "Before cd(Bkg)" << endl; gDirectory->Dump();}
419 fBkgGeantFile->cd();
420 if (fPrintLevel >= 2) {cout << "After cd(Bkg)" << endl; gDirectory->Dump();}
421 // Particles: TreeK for event and branch "Particles"
422 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
423 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
424 if (!fBkgGeantTK) {
425 if (fPrintLevel >= 0) {
426 cout << "Cannot find Kine Tree for background event: " <<
427 fBkgGeantEventNumber << endl;
428 cout << "Goes back to event 0" << endl;
429 }
430 fBkgGeantEventNumber = 0;
431 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
432 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
433 if (!fBkgGeantTK) {
434 cout << "ERROR: cannot find Kine Tree for background event: " <<
435 fBkgGeantEventNumber << endl;
436 exit(0);
437 }
438 }
439 if (fBkgGeantTK)
440 fBkgGeantTK->SetBranchAddress("Particles", &fBkgGeantParticles);
441 fBkgGeantTK->GetEvent(0); // why event 0 ???? necessary ????
442 // Hits: TreeH for event and branch "MUON"
443 sprintf(treeName, "TreeH%d", fBkgGeantEventNumber);
444 fBkgGeantTH = (TTree*)gDirectory->Get(treeName);
445 if (!fBkgGeantTH) {
446 cout << "ERROR: cannot find Hits Tree for background event: " <<
447 fBkgGeantEventNumber << endl;
448 exit(0);
449 }
450 if (fBkgGeantTH && fBkgGeantHits) {
451 branch = fBkgGeantTH->GetBranch("MUON");
452 if (branch) branch->SetAddress(&fBkgGeantHits);
453 }
454 fBkgGeantTH->GetEntries(); // necessary ????
455 // Back to the signal file
456 ((gAlice->TreeK())->GetCurrentFile())->cd();
457 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
458 return;
459}
460
461//__________________________________________________________________________
462void AliMUONEventReconstructor::EventReconstruct(void)
463{
464 // To reconstruct one event
465 if (fPrintLevel >= 1) cout << "enter EventReconstruct" << endl;
466 MakeEventToBeReconstructed();
467 MakeSegments();
468 MakeTracks();
469 return;
470}
471
472 //__________________________________________________________________________
473void AliMUONEventReconstructor::ResetHitsForRec(void)
474{
475 // To reset the array and the number of HitsForRec,
476 // and also the number of HitsForRec
477 // and the index of the first HitForRec per chamber
478 if (fHitsForRecPtr) fHitsForRecPtr->Clear();
479 fNHitsForRec = 0;
9cbdf048 480 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++)
a9e2aefa 481 fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0;
482 return;
483}
484
485 //__________________________________________________________________________
486void AliMUONEventReconstructor::ResetSegments(void)
487{
488 // To reset the TClonesArray of segments and the number of Segments
489 // for all stations
9cbdf048 490 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 491 if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear();
492 fNSegments[st] = 0;
493 }
494 return;
495}
496
497 //__________________________________________________________________________
498void AliMUONEventReconstructor::ResetTracks(void)
499{
500 // To reset the TClonesArray of reconstructed tracks
8429a5e4 501 if (fRecTracksPtr) fRecTracksPtr->Delete();
502 // Delete in order that the Track destructors are called,
503 // hence the space for the TClonesArray of pointers to TrackHit's is freed
a9e2aefa 504 fNRecTracks = 0;
505 return;
506}
507
8429a5e4 508 //__________________________________________________________________________
509void AliMUONEventReconstructor::ResetTrackHits(void)
510{
511 // To reset the TClonesArray of hits on reconstructed tracks
512 if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear();
513 fNRecTrackHits = 0;
514 return;
515}
516
a9e2aefa 517 //__________________________________________________________________________
518void AliMUONEventReconstructor::MakeEventToBeReconstructed(void)
519{
520 // To make the list of hits to be reconstructed,
521 // either from the GEANT hits or from the raw clusters
522 // according to the parameter set for the reconstructor
523 if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl;
524 ResetHitsForRec();
525 if (fRecGeantHits == 1) {
526 // Reconstruction from GEANT hits
527 // Back to the signal file
528 ((gAlice->TreeK())->GetCurrentFile())->cd();
529 // Signal hits
530 // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
531 // Security on MUON ????
532 AddHitsForRecFromGEANT(gAlice->TreeH());
533 // Background hits
534 AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits);
535 // Sort HitsForRec in increasing order with respect to chamber number
536 SortHitsForRecWithIncreasingChamber();
537 }
538 else {
539 // Reconstruction from raw clusters
540 // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
541 // Security on MUON ????
542 // TreeR assumed to be be "prepared" in calling function
543 // by "MUON->GetTreeR(nev)" ????
9cbdf048 544 TTree *treeR = gAlice->TreeR();
545 AddHitsForRecFromRawClusters(treeR);
a9e2aefa 546 // No sorting: it is done automatically in the previous function
547 }
548 if (fPrintLevel >= 10) {
549 cout << "end of MakeEventToBeReconstructed" << endl;
550 cout << "NHitsForRec: " << fNHitsForRec << endl;
9cbdf048 551 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 552 cout << "chamber(0...): " << ch
553 << " NHitsForRec: " << fNHitsForRecPerChamber[ch]
554 << " index(first HitForRec): " << fIndexOfFirstHitForRecPerChamber[ch]
555 << endl;
556 for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch];
557 hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch];
558 hit++) {
559 cout << "HitForRec index(0...): " << hit << endl;
560 ((*fHitsForRecPtr)[hit])->Dump();
561 }
562 }
563 }
564 return;
565}
566
567 //__________________________________________________________________________
568void AliMUONEventReconstructor::AddHitsForRecFromGEANT(TTree *TH)
569{
570 // To add to the list of hits for reconstruction
571 // the GEANT signal hits from a hit tree TH.
572 if (fPrintLevel >= 2)
573 cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl;
574 if (TH == NULL) return;
9cbdf048 575 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 576 // Security on MUON ????
577 // See whether it could be the same for signal and background ????
578 // Loop over tracks in tree
579 Int_t ntracks = (Int_t) TH->GetEntries();
580 if (fPrintLevel >= 2)
581 cout << "ntracks: " << ntracks << endl;
582 for (Int_t track = 0; track < ntracks; track++) {
583 gAlice->ResetHits();
584 TH->GetEvent(track);
585 // Loop over hits
586 Int_t hit = 0;
9cbdf048 587 for (AliMUONHit* mHit = (AliMUONHit*) pMUON->FirstHit(-1);
a9e2aefa 588 mHit;
9cbdf048 589 mHit = (AliMUONHit*) pMUON->NextHit(), hit++) {
a9e2aefa 590 NewHitForRecFromGEANT(mHit,track, hit, 1);
591 } // end of hit loop
592 } // end of track loop
593 return;
594}
595
596 //__________________________________________________________________________
597void AliMUONEventReconstructor::AddHitsForRecFromBkgGEANT(TTree *TH, TClonesArray *Hits)
598{
599 // To add to the list of hits for reconstruction
600 // the GEANT background hits from a hit tree TH and a pointer Hits to a hit list.
601 // How to have only one function "AddHitsForRecFromGEANT" ????
602 if (fPrintLevel >= 2)
603 cout << "enter AddHitsForRecFromBkgGEANT with TH: " << TH << endl;
604 if (TH == NULL) return;
605 // Loop over tracks in tree
606 Int_t ntracks = (Int_t) TH->GetEntries();
607 if (fPrintLevel >= 2)
608 cout << "ntracks: " << ntracks << endl;
609 for (Int_t track = 0; track < ntracks; track++) {
610 if (Hits) Hits->Clear();
611 TH->GetEvent(track);
612 // Loop over hits
613 for (Int_t hit = 0; hit < Hits->GetEntriesFast(); hit++) {
614 NewHitForRecFromGEANT((AliMUONHit*) (*Hits)[hit], track, hit, 0);
615 } // end of hit loop
616 } // end of track loop
617 return;
618}
619
620 //__________________________________________________________________________
621AliMUONHitForRec* AliMUONEventReconstructor::NewHitForRecFromGEANT(AliMUONHit* Hit, Int_t TrackNumber, Int_t HitNumber, Int_t Signal)
622{
623 // To make a new hit for reconstruction from a GEANT hit pointed to by "Hit",
624 // with hit number "HitNumber" in the track numbered "TrackNumber",
625 // either from signal ("Signal" = 1) or background ("Signal" = 0) event.
626 // Selects hits in tracking (not trigger) chambers.
627 // Takes into account the efficiency (fEfficiency)
628 // and the smearing from resolution (fBendingResolution and fNonBendingResolution).
629 // Adds a condition on the radius between RMin and RMax
630 // to better simulate the real chambers.
631 // Returns the pointer to the new hit for reconstruction,
632 // or NULL in case of inefficiency or non tracking chamber or bad radius.
633 // No condition on at most 20 cm from a muon from a resonance
634 // like in Fortran TRACKF_STAT.
635 AliMUONHitForRec* hitForRec;
636 Double_t bendCoor, nonBendCoor, radius;
0a5f36d9 637 Int_t chamber = Hit->Chamber() - 1; // chamber(0...)
a9e2aefa 638 // only in tracking chambers (fChamber starts at 1)
9cbdf048 639 if (chamber >= kMaxMuonTrackingChambers) return NULL;
a9e2aefa 640 // only if hit is efficient (keep track for checking ????)
641 if (gRandom->Rndm() > fEfficiency) return NULL;
642 // only if radius between RMin and RMax
94de3818 643 bendCoor = Hit->Y();
644 nonBendCoor = Hit->X();
a9e2aefa 645 radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor));
d0bfce8d 646 // This cut is not needed with a realistic chamber geometry !!!!
647// if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL;
a9e2aefa 648 // new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's
649 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit);
650 fNHitsForRec++;
651 // add smearing from resolution
652 hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution));
653 hitForRec->SetNonBendingCoor(nonBendCoor
654 + gRandom->Gaus(0., fNonBendingResolution));
d0bfce8d 655// // !!!! without smearing
656// hitForRec->SetBendingCoor(bendCoor);
657// hitForRec->SetNonBendingCoor(nonBendCoor);
a9e2aefa 658 // more information into HitForRec
659 // resolution: angular effect to be added here ????
660 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
661 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
662 // GEANT track info
663 hitForRec->SetHitNumber(HitNumber);
664 hitForRec->SetTHTrack(TrackNumber);
665 hitForRec->SetGeantSignal(Signal);
666 if (fPrintLevel >= 10) {
667 cout << "track: " << TrackNumber << " hit: " << HitNumber << endl;
668 Hit->Dump();
669 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
670 hitForRec->Dump();}
671 return hitForRec;
672}
673
674 //__________________________________________________________________________
675void AliMUONEventReconstructor::SortHitsForRecWithIncreasingChamber()
676{
677 // Sort HitsForRec's in increasing order with respect to chamber number.
678 // Uses the function "Compare".
679 // Update the information for HitsForRec per chamber too.
680 Int_t ch, nhits, prevch;
681 fHitsForRecPtr->Sort();
9cbdf048 682 for (ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 683 fNHitsForRecPerChamber[ch] = 0;
684 fIndexOfFirstHitForRecPerChamber[ch] = 0;
685 }
686 prevch = 0; // previous chamber
687 nhits = 0; // number of hits in current chamber
688 // Loop over HitsForRec
689 for (Int_t hit = 0; hit < fNHitsForRec; hit++) {
690 // chamber number (0...)
691 ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber();
692 // increment number of hits in current chamber
693 (fNHitsForRecPerChamber[ch])++;
694 // update index of first HitForRec in current chamber
695 // if chamber number different from previous one
696 if (ch != prevch) {
697 fIndexOfFirstHitForRecPerChamber[ch] = hit;
698 prevch = ch;
699 }
700 }
701 return;
702}
703
704// //__________________________________________________________________________
705// void AliMUONEventReconstructor::AddHitsForRecFromCathodeCorrelations(TTree* TC)
706// {
707// // OLD VERSION WHEN ONE ONE WAS USING SO CALLED CATHODE CORRELATIONS
708// // To add to the list of hits for reconstruction
709// // the (cathode correlated) raw clusters
710// // No condition added, like in Fortran TRACKF_STAT,
711// // on the radius between RMin and RMax.
712// AliMUONHitForRec *hitForRec;
713// if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromCathodeCorrelations" << endl;
714// AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
715// // Security on MUON ????
716// // Loop over tracking chambers
9cbdf048 717// for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 718// // number of HitsForRec to 0 for the chamber
719// fNHitsForRecPerChamber[ch] = 0;
720// // index of first HitForRec for the chamber
721// if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
722// else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
723// TClonesArray *reconst_hits = MUON->ReconstHitsAddress(ch);
724// MUON->ResetReconstHits();
725// TC->GetEvent();
726// Int_t ncor = (Int_t)reconst_hits->GetEntries();
727// // Loop over (cathode correlated) raw clusters
728// for (Int_t cor = 0; cor < ncor; cor++) {
729// AliMUONReconstHit * mCor =
730// (AliMUONReconstHit*) reconst_hits->UncheckedAt(cor);
731// // new AliMUONHitForRec from (cathode correlated) raw cluster
732// // and increment number of AliMUONHitForRec's (total and in chamber)
733// hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(mCor);
734// fNHitsForRec++;
735// (fNHitsForRecPerChamber[ch])++;
736// // more information into HitForRec
737// hitForRec->SetChamberNumber(ch);
738// hitForRec->SetHitNumber(cor);
739// // Z coordinate of the chamber (cm) with sign opposite to GEANT sign
740// // could (should) be more exact from chamber geometry ????
741// hitForRec->SetZ(-(&(MUON->Chamber(ch)))->Z());
742// if (fPrintLevel >= 10) {
743// cout << "chamber (0...): " << ch <<
744// " cathcorrel (0...): " << cor << endl;
745// mCor->Dump();
746// cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
747// hitForRec->Dump();}
748// } // end of cluster loop
749// } // end of chamber loop
750// return;
751// }
752
753 //__________________________________________________________________________
754void AliMUONEventReconstructor::AddHitsForRecFromRawClusters(TTree* TR)
755{
756 // To add to the list of hits for reconstruction all the raw clusters
757 // No condition added, like in Fortran TRACKF_STAT,
758 // on the radius between RMin and RMax.
759 AliMUONHitForRec *hitForRec;
760 AliMUONRawCluster *clus;
761 Int_t iclus, nclus;
762 TClonesArray *rawclusters;
763 if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl;
9cbdf048 764 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 765 // Security on MUON ????
766 // Loop over tracking chambers
9cbdf048 767 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 768 // number of HitsForRec to 0 for the chamber
769 fNHitsForRecPerChamber[ch] = 0;
770 // index of first HitForRec for the chamber
771 if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
772 else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
9cbdf048 773 rawclusters = pMUON->RawClustAddress(ch);
774 pMUON->ResetRawClusters();
a9e2aefa 775 TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ????
776 nclus = (Int_t) (rawclusters->GetEntries());
777 // Loop over (cathode correlated) raw clusters
778 for (iclus = 0; iclus < nclus; iclus++) {
779 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus);
780 // new AliMUONHitForRec from raw cluster
781 // and increment number of AliMUONHitForRec's (total and in chamber)
782 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus);
783 fNHitsForRec++;
784 (fNHitsForRecPerChamber[ch])++;
785 // more information into HitForRec
786 // resolution: info should be already in raw cluster and taken from it ????
787 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
788 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
789 // original raw cluster
790 hitForRec->SetChamberNumber(ch);
791 hitForRec->SetHitNumber(iclus);
ba5b68db 792 // Z coordinate of the raw cluster (cm)
cfe0107f 793 hitForRec->SetZ(clus->fZ[0]);
a9e2aefa 794 if (fPrintLevel >= 10) {
795 cout << "chamber (0...): " << ch <<
796 " raw cluster (0...): " << iclus << endl;
797 clus->Dump();
798 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
799 hitForRec->Dump();}
800 } // end of cluster loop
801 } // end of chamber loop
802 return;
803}
804
805 //__________________________________________________________________________
806void AliMUONEventReconstructor::MakeSegments(void)
807{
808 // To make the list of segments in all stations,
809 // from the list of hits to be reconstructed
810 if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl;
811 ResetSegments();
812 // Loop over stations
9cbdf048 813 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 814 MakeSegmentsPerStation(st);
815 if (fPrintLevel >= 10) {
816 cout << "end of MakeSegments" << endl;
9cbdf048 817 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 818 cout << "station(0...): " << st
819 << " Segments: " << fNSegments[st]
820 << endl;
821 for (Int_t seg = 0;
822 seg < fNSegments[st];
823 seg++) {
824 cout << "Segment index(0...): " << seg << endl;
825 ((*fSegmentsPtr[st])[seg])->Dump();
826 }
827 }
828 }
829 return;
830}
831
832 //__________________________________________________________________________
833void AliMUONEventReconstructor::MakeSegmentsPerStation(Int_t Station)
834{
835 // To make the list of segments in station number "Station" (0...)
836 // from the list of hits to be reconstructed.
837 // Updates "fNSegments"[Station].
838 // Segments in stations 4 and 5 are sorted
839 // according to increasing absolute value of "impact parameter"
840 AliMUONHitForRec *hit1Ptr, *hit2Ptr;
841 AliMUONSegment *segment;
842 Bool_t last2st;
843 Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor,
d0bfce8d 844 impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings.
9cbdf048 845 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 846 if (fPrintLevel >= 1)
847 cout << "enter MakeSegmentsPerStation (0...) " << Station << endl;
848 // first and second chambers (0...) in the station
849 Int_t ch1 = 2 * Station;
850 Int_t ch2 = ch1 + 1;
851 // variable true for stations downstream of the dipole:
852 // Station(0..4) equal to 3 or 4
853 if ((Station == 3) || (Station == 4)) {
854 last2st = kTRUE;
855 // maximum impact parameter (cm) according to fMinBendingMomentum...
856 maxImpactParam =
857 TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum));
d0bfce8d 858 // minimum impact parameter (cm) according to fMaxBendingMomentum...
859 minImpactParam =
860 TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum));
a9e2aefa 861 }
862 else last2st = kFALSE;
863 // extrapolation factor from Z of first chamber to Z of second chamber
864 // dZ to be changed to take into account fine structure of chambers ????
865 Double_t extrapFact =
9cbdf048 866 (&(pMUON->Chamber(ch2)))->Z() / (&(pMUON->Chamber(ch1)))->Z();
a9e2aefa 867 // index for current segment
868 Int_t segmentIndex = 0;
869 // Loop over HitsForRec in the first chamber of the station
870 for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1];
871 hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1];
872 hit1++) {
873 // pointer to the HitForRec
874 hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]);
875 // extrapolation,
876 // on the straight line joining the HitForRec to the vertex (0,0,0),
877 // to the Z of the second chamber of the station
878 extBendCoor = extrapFact * hit1Ptr->GetBendingCoor();
879 extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor();
880 // Loop over HitsForRec in the second chamber of the station
881 for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2];
882 hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2];
883 hit2++) {
884 // pointer to the HitForRec
885 hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]);
886 // absolute values of distances, in bending and non bending planes,
887 // between the HitForRec in the second chamber
888 // and the previous extrapolation
889 distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor);
890 distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor);
891 if (last2st) {
892 // bending slope
893 bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) /
894 (hit1Ptr->GetZ() - hit2Ptr->GetZ());
895 // absolute value of impact parameter
896 impactParam =
897 TMath::Abs(hit1Ptr->GetBendingCoor() - hit2Ptr->GetZ() * bendingSlope);
898 }
899 // check for distances not too large,
900 // and impact parameter not too big if stations downstream of the dipole.
901 // Conditions "distBend" and "impactParam" correlated for these stations ????
902 if ((distBend < fSegmentMaxDistBending[Station]) &&
903 (distNonBend < fSegmentMaxDistNonBending[Station]) &&
d0bfce8d 904 (!last2st || (impactParam < maxImpactParam)) &&
905 (!last2st || (impactParam > minImpactParam))) {
a9e2aefa 906 // make new segment
907 segment = new ((*fSegmentsPtr[Station])[segmentIndex])
908 AliMUONSegment(hit1Ptr, hit2Ptr);
909 // update "link" to this segment from the hit in the first chamber
910 if (hit1Ptr->GetNSegments() == 0)
911 hit1Ptr->SetIndexOfFirstSegment(segmentIndex);
912 hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1);
913 if (fPrintLevel >= 10) {
914 cout << "segmentIndex(0...): " << segmentIndex
915 << " distBend: " << distBend
916 << " distNonBend: " << distNonBend
917 << endl;
918 segment->Dump();
919 cout << "HitForRec in first chamber" << endl;
920 hit1Ptr->Dump();
921 cout << "HitForRec in second chamber" << endl;
922 hit2Ptr->Dump();
923 };
924 // increment index for current segment
925 segmentIndex++;
926 }
927 } //for (Int_t hit2
928 } // for (Int_t hit1...
929 fNSegments[Station] = segmentIndex;
930 // Sorting according to "impact parameter" if station(1..5) 4 or 5,
931 // i.e. Station(0..4) 3 or 4, using the function "Compare".
932 // After this sorting, it is impossible to use
933 // the "fNSegments" and "fIndexOfFirstSegment"
934 // of the HitForRec in the first chamber to explore all segments formed with it.
935 // Is this sorting really needed ????
936 if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort();
937 if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: "
938 << fNSegments[Station] << endl;
939 return;
940}
941
942 //__________________________________________________________________________
943void AliMUONEventReconstructor::MakeTracks(void)
944{
945 // To make the tracks,
946 // from the list of segments and points in all stations
947 if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl;
8429a5e4 948 // The order may be important for the following Reset's
a9e2aefa 949 ResetTracks();
8429a5e4 950 ResetTrackHits();
a9e2aefa 951 // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
952 MakeTrackCandidates();
953 // Follow tracks in stations(1..) 3, 2 and 1
954 FollowTracks();
8429a5e4 955 // Remove double tracks
956 RemoveDoubleTracks();
a9e2aefa 957 return;
958}
959
960 //__________________________________________________________________________
961Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment)
962{
963 // To make track candidates with two segments in stations(1..) 4 and 5,
964 // the first segment being pointed to by "BegSegment".
965 // Returns the number of such track candidates.
966 Int_t endStation, iEndSegment, nbCan2Seg;
967 AliMUONSegment *endSegment, *extrapSegment;
968 AliMUONTrack *recTrack;
969 Double_t mcsFactor;
970 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl;
971 // Station for the end segment
972 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
973 // multiple scattering factor corresponding to one chamber
974 mcsFactor = 0.0136 /
975 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
976 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
977 // linear extrapolation to end station
978 extrapSegment =
979 BegSegment->CreateSegmentFromLinearExtrapToStation(endStation, mcsFactor);
980 // number of candidates with 2 segments to 0
981 nbCan2Seg = 0;
982 // Loop over segments in the end station
983 for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) {
984 // pointer to segment
985 endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]);
986 // test compatibility between current segment and "extrapSegment"
04b5ea16 987 // 4 because 4 quantities in chi2
a9e2aefa 988 if ((endSegment->
989 NormalizedChi2WithSegment(extrapSegment,
990 fMaxSigma2Distance)) <= 4.0) {
991 // both segments compatible:
992 // make track candidate from "begSegment" and "endSegment"
993 if (fPrintLevel >= 2)
994 cout << "TrackCandidate with Segment " << iEndSegment <<
995 " in Station(0..) " << endStation << endl;
996 // flag for both segments in one track:
997 // to be done in track constructor ????
998 BegSegment->SetInTrack(kTRUE);
999 endSegment->SetInTrack(kTRUE);
1000 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1001 AliMUONTrack(BegSegment, endSegment, this);
1002 fNRecTracks++;
1003 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1004 // increment number of track candidates with 2 segments
1005 nbCan2Seg++;
1006 }
1007 } // for (iEndSegment = 0;...
1008 delete extrapSegment; // should not delete HitForRec's it points to !!!!
1009 return nbCan2Seg;
1010}
1011
1012 //__________________________________________________________________________
1013Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment)
1014{
1015 // To make track candidates with one segment and one point
1016 // in stations(1..) 4 and 5,
1017 // the segment being pointed to by "BegSegment".
1018 Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit;
1019 AliMUONHitForRec *extrapHitForRec, *hit;
1020 AliMUONTrack *recTrack;
1021 Double_t mcsFactor;
1022 if (fPrintLevel >= 1)
1023 cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl;
1024 // station for the end point
1025 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1026 // multiple scattering factor corresponding to one chamber
1027 mcsFactor = 0.0136 /
1028 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1029 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1030 // first and second chambers(0..) in the end station
1031 ch1 = 2 * endStation;
1032 ch2 = ch1 + 1;
1033 // number of candidates to 0
1034 nbCan1Seg1Hit = 0;
1035 // Loop over chambers of the end station
1036 for (ch = ch2; ch >= ch1; ch--) {
1037 // linear extrapolation to chamber
1038 extrapHitForRec =
1039 BegSegment->CreateHitForRecFromLinearExtrapToChamber(ch, mcsFactor);
1040 // limits for the hit index in the loop
1041 iHitMin = fIndexOfFirstHitForRecPerChamber[ch];
1042 iHitMax = iHitMin + fNHitsForRecPerChamber[ch];
1043 // Loop over HitForRec's in the chamber
1044 for (iHit = iHitMin; iHit < iHitMax; iHit++) {
1045 // pointer to HitForRec
1046 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
1047 // test compatibility between current HitForRec and "extrapHitForRec"
04b5ea16 1048 // 2 because 2 quantities in chi2
a9e2aefa 1049 if ((hit->
1050 NormalizedChi2WithHitForRec(extrapHitForRec,
1051 fMaxSigma2Distance)) <= 2.0) {
1052 // both HitForRec's compatible:
1053 // make track candidate from begSegment and current HitForRec
1054 if (fPrintLevel >= 2)
1055 cout << "TrackCandidate with HitForRec " << iHit <<
1056 " in Chamber(0..) " << ch << endl;
1057 // flag for beginning segments in one track:
1058 // to be done in track constructor ????
1059 BegSegment->SetInTrack(kTRUE);
1060 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1061 AliMUONTrack(BegSegment, hit, this);
1062 // the right place to eliminate "double counting" ???? how ????
1063 fNRecTracks++;
1064 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1065 // increment number of track candidates
1066 nbCan1Seg1Hit++;
1067 }
1068 } // for (iHit = iHitMin;...
1069 delete extrapHitForRec;
1070 } // for (ch = ch2;...
1071 return nbCan1Seg1Hit;
1072}
1073
1074 //__________________________________________________________________________
1075void AliMUONEventReconstructor::MakeTrackCandidates(void)
1076{
1077 // To make track candidates
1078 // with at least 3 aligned points in stations(1..) 4 and 5
1079 // (two Segment's or one Segment and one HitForRec)
1080 Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg;
1081 AliMUONSegment *begSegment;
1082 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl;
1083 // Loop over stations(1..) 5 and 4 for the beginning segment
1084 for (begStation = 4; begStation > 2; begStation--) {
1085 // Loop over segments in the beginning station
1086 for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) {
1087 // pointer to segment
1088 begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]);
1089 if (fPrintLevel >= 2)
1090 cout << "look for TrackCandidate's with Segment " << iBegSegment <<
1091 " in Station(0..) " << begStation << endl;
1092 // Look for track candidates with two segments,
1093 // "begSegment" and all compatible segments in other station.
1094 // Only for beginning station(1..) 5
1095 // because candidates with 2 segments have to looked for only once.
1096 if (begStation == 4)
1097 nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment);
956019b6 1098 // Look for track candidates with one segment and one point,
a9e2aefa 1099 // "begSegment" and all compatible HitForRec's in other station.
1100 // Only if "begSegment" does not belong already to a track candidate.
1101 // Is that a too strong condition ????
1102 if (!(begSegment->GetInTrack()))
1103 nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment);
1104 } // for (iBegSegment = 0;...
1105 } // for (begStation = 4;...
1106 return;
1107}
1108
1109 //__________________________________________________________________________
1110void AliMUONEventReconstructor::FollowTracks(void)
1111{
1112 // Follow tracks in stations(1..) 3, 2 and 1
04b5ea16 1113 // too long: should be made more modular !!!!
d0bfce8d 1114 AliMUONHitForRec *bestHit, *extrapHit, *extrapCorrHit, *hit;
1115 AliMUONSegment *bestSegment, *extrapSegment, *extrapCorrSegment, *segment;
04b5ea16 1116 AliMUONTrack *track, *nextTrack;
1117 AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex;
ecfa008b 1118 // -1 to avoid compilation warnings
1119 Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex;
04b5ea16 1120 Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor;
d0bfce8d 1121 Double_t bendingMomentum, chi2Norm = 0.;
9cbdf048 1122 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
04b5ea16 1123 // local maxSigma2Distance, for easy increase in testing
1124 maxSigma2Distance = fMaxSigma2Distance;
a9e2aefa 1125 if (fPrintLevel >= 2)
1126 cout << "enter FollowTracks" << endl;
1127 // Loop over track candidates
04b5ea16 1128 track = (AliMUONTrack*) fRecTracksPtr->First();
1129 trackIndex = -1;
1130 while (track) {
1131 // Follow function for each track candidate ????
1132 trackIndex++;
1133 nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track
a9e2aefa 1134 if (fPrintLevel >= 2)
1135 cout << "FollowTracks: track candidate(0..): " << trackIndex << endl;
956019b6 1136 // Fit track candidate
1137 track->SetFitMCS(0); // without multiple Coulomb scattering
1138 track->SetFitNParam(3); // with 3 parameters (X = Y = 0)
1139 track->SetFitStart(0); // from parameters at vertex
1140 track->Fit();
a9e2aefa 1141 if (fPrintLevel >= 10) {
1142 cout << "FollowTracks: track candidate(0..): " << trackIndex
956019b6 1143 << " after fit in stations(0..) 3 and 4" << endl;
a9e2aefa 1144 track->RecursiveDump();
1145 }
1146 // Loop over stations(1..) 3, 2 and 1
04b5ea16 1147 // something SPECIAL for stations 2 and 1 for majority 3 coincidence ????
1148 // otherwise: majority coincidence 2 !!!!
a9e2aefa 1149 for (station = 2; station >= 0; station--) {
1150 // Track parameters at first track hit (smallest Z)
1151 trackParam1 = ((AliMUONTrackHit*)
1152 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1153 // extrapolation to station
1154 trackParam1->ExtrapToStation(station, trackParam);
79e1e601 1155 extrapSegment = new AliMUONSegment(); // empty segment
d0bfce8d 1156 extrapCorrSegment = new AliMUONSegment(); // empty corrected segment
a9e2aefa 1157 // multiple scattering factor corresponding to one chamber
1158 // and momentum in bending plane (not total)
1159 mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum();
1160 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1161 // Z difference from previous station
9cbdf048 1162 dZ1 = (&(pMUON->Chamber(2 * station)))->Z() -
1163 (&(pMUON->Chamber(2 * station + 2)))->Z();
a9e2aefa 1164 // Z difference between the two previous stations
9cbdf048 1165 dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() -
1166 (&(pMUON->Chamber(2 * station + 4)))->Z();
04b5ea16 1167 // Z difference between the two chambers in the previous station
1168 dZ3 = (&(pMUON->Chamber(2 * station)))->Z() -
1169 (&(pMUON->Chamber(2 * station + 1)))->Z();
1170 extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1171 extrapSegment->
1172 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1173 extrapSegment->UpdateFromStationTrackParam
1174 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1175 trackParam1->GetInverseBendingMomentum());
d0bfce8d 1176 // same thing for corrected segment
1177 // better to use copy constructor, after checking that it works properly !!!!
1178 extrapCorrSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1179 extrapCorrSegment->
1180 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1181 extrapCorrSegment->UpdateFromStationTrackParam
1182 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1183 trackParam1->GetInverseBendingMomentum());
a9e2aefa 1184 bestChi2 = 5.0;
1185 bestSegment = NULL;
1186 if (fPrintLevel >= 10) {
1187 cout << "FollowTracks: track candidate(0..): " << trackIndex
1188 << " Look for segment in station(0..): " << station << endl;
1189 }
1190 // Loop over segments in station
1191 for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) {
1192 // Look for best compatible Segment in station
1193 // should consider all possibilities ????
1194 // multiple scattering ????
1195 // separation in 2 functions: Segment and HitForRec ????
1196 segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]);
d0bfce8d 1197 // correction of corrected segment (fBendingCoor and fNonBendingCoor)
1198 // according to real Z value of "segment" and slopes of "extrapSegment"
1199 extrapCorrSegment->
1200 SetBendingCoor(extrapSegment->GetBendingCoor() +
1201 extrapSegment->GetBendingSlope() *
1202 (segment->GetHitForRec1()->GetZ() -
1203 (&(pMUON->Chamber(2 * station)))->Z()));
1204 extrapCorrSegment->
1205 SetNonBendingCoor(extrapSegment->GetNonBendingCoor() +
1206 extrapSegment->GetNonBendingSlope() *
1207 (segment->GetHitForRec1()->GetZ() -
1208 (&(pMUON->Chamber(2 * station)))->Z()));
1209 chi2 = segment->
1210 NormalizedChi2WithSegment(extrapCorrSegment, maxSigma2Distance);
a9e2aefa 1211 if (chi2 < bestChi2) {
1212 // update best Chi2 and Segment if better found
1213 bestSegment = segment;
1214 bestChi2 = chi2;
1215 }
1216 }
1217 if (bestSegment) {
1218 // best segment found: add it to track candidate
1219 track->AddSegment(bestSegment);
1220 // set track parameters at these two TrakHit's
1221 track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0]));
1222 track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1]));
1223 if (fPrintLevel >= 10) {
1224 cout << "FollowTracks: track candidate(0..): " << trackIndex
1225 << " Added segment in station(0..): " << station << endl;
1226 track->RecursiveDump();
1227 }
1228 }
1229 else {
1230 // No best segment found:
1231 // Look for best compatible HitForRec in station:
1232 // should consider all possibilities ????
1233 // multiple scattering ???? do about like for extrapSegment !!!!
79e1e601 1234 extrapHit = new AliMUONHitForRec(); // empty hit
d0bfce8d 1235 extrapCorrHit = new AliMUONHitForRec(); // empty corrected hit
a9e2aefa 1236 bestChi2 = 3.0;
1237 bestHit = NULL;
1238 if (fPrintLevel >= 10) {
1239 cout << "FollowTracks: track candidate(0..): " << trackIndex
1240 << " Segment not found, look for hit in station(0..): " << station
1241 << endl;
1242 }
1243 // Loop over chambers of the station
d82671a0 1244 for (chInStation = 0; chInStation < 2; chInStation++) {
a9e2aefa 1245 // coordinates of extrapolated hit
d82671a0 1246 extrapHit->
1247 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1248 extrapHit->
1249 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
a9e2aefa 1250 // resolutions from "extrapSegment"
1251 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1252 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
d0bfce8d 1253 // same things for corrected hit
1254 // better to use copy constructor, after checking that it works properly !!!!
1255 extrapCorrHit->
1256 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1257 extrapCorrHit->
1258 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
1259 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1260 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
a9e2aefa 1261 // Loop over hits in the chamber
956019b6 1262 ch = 2 * station + chInStation;
a9e2aefa 1263 for (iHit = fIndexOfFirstHitForRecPerChamber[ch];
1264 iHit < fIndexOfFirstHitForRecPerChamber[ch] +
1265 fNHitsForRecPerChamber[ch];
1266 iHit++) {
1267 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
d0bfce8d 1268 // correction of corrected hit (fBendingCoor and fNonBendingCoor)
1269 // according to real Z value of "hit" and slopes of right "trackParam"
1270 extrapCorrHit->
1271 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor() +
1272 (&(trackParam[chInStation]))->GetBendingSlope() *
1273 (hit->GetZ() -
1274 (&(trackParam[chInStation]))->GetZ()));
1275 extrapCorrHit->
1276 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor() +
1277 (&(trackParam[chInStation]))->GetNonBendingSlope() *
1278 (hit->GetZ() -
1279 (&(trackParam[chInStation]))->GetZ()));
a9e2aefa 1280 // condition for hit not already in segment ????
1281 chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance);
1282 if (chi2 < bestChi2) {
1283 // update best Chi2 and HitForRec if better found
1284 bestHit = hit;
1285 bestChi2 = chi2;
d82671a0 1286 chBestHit = chInStation;
a9e2aefa 1287 }
1288 }
1289 }
1290 if (bestHit) {
1291 // best hit found: add it to track candidate
1292 track->AddHitForRec(bestHit);
956019b6 1293 // set track parameters at this TrackHit
a9e2aefa 1294 track->SetTrackParamAtHit(track->GetNTrackHits() - 1,
1295 &(trackParam[chBestHit]));
1296 if (fPrintLevel >= 10) {
1297 cout << "FollowTracks: track candidate(0..): " << trackIndex
1298 << " Added hit in station(0..): " << station << endl;
1299 track->RecursiveDump();
1300 }
1301 }
1302 else {
8429a5e4 1303 // Remove current track candidate
1304 // and corresponding TrackHit's, ...
1305 track->Remove();
04b5ea16 1306 delete extrapSegment;
d0bfce8d 1307 delete extrapCorrSegment;
1308 delete extrapHit;
1309 delete extrapCorrHit;
a9e2aefa 1310 break; // stop the search for this candidate:
1311 // exit from the loop over station
1312 }
d0bfce8d 1313 delete extrapHit;
1314 delete extrapCorrHit;
a9e2aefa 1315 }
04b5ea16 1316 delete extrapSegment;
d0bfce8d 1317 delete extrapCorrSegment;
a9e2aefa 1318 // Sort track hits according to increasing Z
1319 track->GetTrackHitsPtr()->Sort();
1320 // Update track parameters at first track hit (smallest Z)
1321 trackParam1 = ((AliMUONTrackHit*)
1322 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
d0bfce8d 1323 bendingMomentum = 0.;
1324 if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.)
1325 bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum()));
1326 // Track removed if bendingMomentum not in window [min, max]
1327 if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) {
1328 track->Remove();
1329 break; // stop the search for this candidate:
1330 // exit from the loop over station
1331 }
956019b6 1332 // Track fit
04b5ea16 1333 // with multiple Coulomb scattering if all stations
1334 if (station == 0) track->SetFitMCS(1);
956019b6 1335 // without multiple Coulomb scattering if not all stations
04b5ea16 1336 else track->SetFitMCS(0);
956019b6 1337 track->SetFitNParam(5); // with 5 parameters (momentum and position)
1338 track->SetFitStart(1); // from parameters at first hit
1339 track->Fit();
d0bfce8d 1340 Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5);
1341 if (numberOfDegFree > 0) {
1342 chi2Norm = track->GetFitFMin() / numberOfDegFree;
1343 } else {
1344 chi2Norm = 1.e10;
1345 }
1346 // Track removed if normalized chi2 too high
1347 if (chi2Norm > fMaxChi2) {
1348 track->Remove();
1349 break; // stop the search for this candidate:
1350 // exit from the loop over station
1351 }
a9e2aefa 1352 if (fPrintLevel >= 10) {
1353 cout << "FollowTracks: track candidate(0..): " << trackIndex
1354 << " after fit from station(0..): " << station << " to 4" << endl;
1355 track->RecursiveDump();
1356 }
04b5ea16 1357 // Track extrapolation to the vertex through the absorber (Branson)
956019b6 1358 // after going through the first station
04b5ea16 1359 if (station == 0) {
1360 trackParamVertex = *trackParam1;
1361 (&trackParamVertex)->ExtrapToVertex();
1362 track->SetTrackParamAtVertex(&trackParamVertex);
6ae236ee 1363 if (fPrintLevel >= 1) {
1364 cout << "FollowTracks: track candidate(0..): " << trackIndex
1365 << " after extrapolation to vertex" << endl;
1366 track->RecursiveDump();
1367 }
04b5ea16 1368 }
a9e2aefa 1369 } // for (station = 2;...
04b5ea16 1370 // go really to next track
1371 track = nextTrack;
1372 } // while (track)
1373 // Compression of track array (necessary after Remove ????)
1374 fRecTracksPtr->Compress();
1375 return;
1376}
1377
1378 //__________________________________________________________________________
8429a5e4 1379void AliMUONEventReconstructor::RemoveDoubleTracks(void)
1380{
1381 // To remove double tracks.
1382 // Tracks are considered identical
1383 // if they have at least half of their hits in common.
1384 // Among two identical tracks, one keeps the track with the larger number of hits
1385 // or, if these numbers are equal, the track with the minimum Chi2.
1386 AliMUONTrack *track1, *track2, *trackToRemove;
1387 Bool_t identicalTracks;
1388 Int_t hitsInCommon, nHits1, nHits2;
1389 identicalTracks = kTRUE;
1390 while (identicalTracks) {
1391 identicalTracks = kFALSE;
1392 // Loop over first track of the pair
1393 track1 = (AliMUONTrack*) fRecTracksPtr->First();
1394 while (track1 && (!identicalTracks)) {
1395 nHits1 = track1->GetNTrackHits();
1396 // Loop over second track of the pair
1397 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1398 while (track2 && (!identicalTracks)) {
1399 nHits2 = track2->GetNTrackHits();
1400 // number of hits in common between two tracks
1401 hitsInCommon = track1->HitsInCommon(track2);
1402 // check for identical tracks
1403 if ((4 * hitsInCommon) >= (nHits1 + nHits2)) {
1404 identicalTracks = kTRUE;
1405 // decide which track to remove
1406 if (nHits1 > nHits2) trackToRemove = track2;
1407 else if (nHits1 < nHits2) trackToRemove = track1;
1408 else if ((track1->GetFitFMin()) < (track2->GetFitFMin()))
1409 trackToRemove = track2;
1410 else trackToRemove = track1;
1411 // remove it
1412 trackToRemove->Remove();
1413 }
1414 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
1415 } // track2
1416 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1417 } // track1
1418 }
1419 return;
1420}
1421
1422 //__________________________________________________________________________
04b5ea16 1423void AliMUONEventReconstructor::EventDump(void)
1424{
1425 // Dump reconstructed event (track parameters at vertex and at first hit),
1426 // and the particle parameters
1427
1428 AliMUONTrack *track;
1429 AliMUONTrackParam *trackParam, *trackParam1;
04b5ea16 1430 TParticle *p;
1431 Double_t bendingSlope, nonBendingSlope, pYZ;
1432 Double_t pX, pY, pZ, x, y, z, c;
1433 Int_t np, trackIndex, nTrackHits;
1434
1435 if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl;
1436 if (fPrintLevel >= 1) {
1437 cout << " Number of Reconstructed tracks :" << fNRecTracks << endl;
1438 }
1439 fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole
1440 // Loop over reconstructed tracks
1441 for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) {
1442 if (fPrintLevel >= 1)
1443 cout << " track number: " << trackIndex << endl;
1444 // function for each track for modularity ????
1445 track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]);
1446 nTrackHits = track->GetNTrackHits();
1447 if (fPrintLevel >= 1)
1448 cout << " number of track hits: " << nTrackHits << endl;
1449 // track parameters at Vertex
1450 trackParam = track->GetTrackParamAtVertex();
1451 x = trackParam->GetNonBendingCoor();
1452 y = trackParam->GetBendingCoor();
1453 z = trackParam->GetZ();
1454 bendingSlope = trackParam->GetBendingSlope();
1455 nonBendingSlope = trackParam->GetNonBendingSlope();
1456 pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
1457 pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope);
1458 pX = pZ * nonBendingSlope;
1459 pY = pZ * bendingSlope;
1460 c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum());
1461 if (fPrintLevel >= 1)
1462 printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1463 z, x, y, pX, pY, pZ, c);
1464
1465 // track parameters at first hit
1466 trackParam1 = ((AliMUONTrackHit*)
1467 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1468 x = trackParam1->GetNonBendingCoor();
1469 y = trackParam1->GetBendingCoor();
1470 z = trackParam1->GetZ();
1471 bendingSlope = trackParam1->GetBendingSlope();
1472 nonBendingSlope = trackParam1->GetNonBendingSlope();
1473 pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum());
1474 pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope);
1475 pX = pZ * nonBendingSlope;
1476 pY = pZ * bendingSlope;
1477 c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum());
1478 if (fPrintLevel >= 1)
1479 printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1480 z, x, y, pX, pY, pZ, c);
1481 }
1482 // informations about generated particles
2ab0c725 1483 np = gAlice->GetNtrack();
04b5ea16 1484 printf(" **** number of generated particles: %d \n", np);
1485
1486 for (Int_t iPart = 0; iPart < np; iPart++) {
2ab0c725 1487 p = gAlice->Particle(iPart);
04b5ea16 1488 printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n",
1489 iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode());
1490 }
a9e2aefa 1491 return;
1492}
1493
c7ba256d 1494void AliMUONEventReconstructor::FillEvent()
1495{
1496// Create a new AliMUONRecoEvent, fill its track list, then add it as a
1497// leaf in the Event branch of TreeRecoEvent tree
1498 cout << "Enter FillEvent() ...\n";
1499
1500 if (!fRecoEvent) {
1501 fRecoEvent = new AliMUONRecoEvent();
1502 } else {
1503 fRecoEvent->Clear();
1504 }
1505 //save current directory
1506 TDirectory *current = gDirectory;
1507 if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE");
1508 if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events");
1509 if (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) {
1510 if (fPrintLevel > 1) fRecoEvent->EventInfo();
1511 TBranch *branch = fEventTree->GetBranch("Event");
d0f40f23 1512 if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000);
c7ba256d 1513 branch->SetAutoDelete();
1514 fTreeFile->cd();
1515 fEventTree->Fill();
1516 fTreeFile->Write();
1517 }
1518 // restore directory
1519 current->cd();
1520}