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Made a new abstract base class; AliL3HoughBaseTransformer for different implementations
[u/mrichter/AliRoot.git] / MUON / AliMUONEventReconstructor.cxx
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a9e2aefa 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/*
17$Log$
f69d51b5 18Revision 1.27 2001/07/27 13:03:12 hristov
19Default Branch split level set to 99
20
d0f40f23 21Revision 1.26 2001/05/03 08:11:31 hristov
22stdlib.h included to define exit()
23
82a4bc7b 24Revision 1.25 2001/04/25 14:50:42 gosset
25Corrections to violations of coding conventions
26
3831f268 27Revision 1.24 2001/03/30 09:37:58 gosset
28Initialisations of pointers... for GEANT background events in the constructor
29
47a6b602 30Revision 1.23 2001/01/26 21:44:45 morsch
31Use access functions to AliMUONDigit, ... member data.
32
0a5f36d9 33Revision 1.22 2001/01/26 20:00:53 hristov
34Major upgrade of AliRoot code
3f5cf0b3 35Revision 1.20 2001/01/08 11:01:02 gosset
36Modifications used for addendum to Dimuon TDR (JP Cussonneau):
37*. MaxBendingMomentum to make both a segment and a track (default 500)
38*. MaxChi2 per degree of freedom to make a track (default 100)
39*. MinBendingMomentum used also to make a track
40 and not only a segment (default 3)
41*. wider roads for track search in stations 1 to 3
42*. extrapolation to actual Z instead of Z(chamber) in FollowTracks
43*. in track fit:
44 - limits on parameters X and Y (+/-500)
45 - covariance matrices in double precision
46 - normalization of covariance matrices before inversion
47 - suppression of Minuit printouts
48*. correction against memory leak (delete extrapHit) in FollowTracks
49*. RMax to 10 degrees with Z(chamber) instead of fixed values;
50 RMin and Rmax cuts suppressed in NewHitForRecFromGEANT,
51 because useless with realistic geometry
52
d0bfce8d 53Revision 1.19 2000/11/20 11:24:10 gosset
54New package for reconstructed tracks (A. Gheata):
55* tree output in the file "tree_reco.root"
56* display events and make histograms from this file
57
c7ba256d 58Revision 1.18 2000/10/26 12:47:03 gosset
59Real distance between chambers of each station taken into account
60for the reconstruction parameters "fSegmentMaxDistBending[5]"
61
860cef81 62Revision 1.17 2000/10/24 09:26:20 gosset
63Comments updated
64
ba5b68db 65Revision 1.16 2000/10/24 09:22:35 gosset
66Method AddHitsForRecFromRawClusters: real Z of raw cluster and not Z of chamber
67
cfe0107f 68Revision 1.15 2000/10/12 15:17:30 gosset
69Sign of fSimpleBValue corrected: sign ox Bx and not Bz (thanks to Galina)
70
065bd0e1 71Revision 1.14 2000/10/04 18:21:26 morsch
72Include stdlib.h
73
e7d455d5 74Revision 1.13 2000/10/02 21:28:09 fca
75Removal of useless dependecies via forward declarations
76
94de3818 77Revision 1.12 2000/10/02 16:58:29 egangler
78Cleaning of the code :
79-> coding conventions
80-> void Streamers
81-> some useless includes removed or replaced by "class" statement
82
ecfa008b 83Revision 1.11 2000/09/22 09:16:33 hristov
84Casting needed on DEC
85
8832c7b4 86Revision 1.10 2000/09/19 09:49:50 gosset
87AliMUONEventReconstructor package
88* track extrapolation independent from reco_muon.F, use of AliMagF...
89* possibility to use new magnetic field (automatic from generated root file)
90
a6f03ddb 91Revision 1.9 2000/07/20 12:45:27 gosset
92New "EventReconstructor..." structure,
93 hopefully more adapted to tree/streamer.
94"AliMUONEventReconstructor::RemoveDoubleTracks"
95 to keep only one track among similar ones.
96
8429a5e4 97Revision 1.8 2000/07/18 16:04:06 gosset
98AliMUONEventReconstructor package:
99* a few minor modifications and more comments
100* a few corrections
101 * right sign for Z of raw clusters
102 * right loop over chambers inside station
103 * symmetrized covariance matrix for measurements (TrackChi2MCS)
104 * right sign of charge in extrapolation (ExtrapToZ)
105 * right zEndAbsorber for Branson correction below 3 degrees
106* use of TVirtualFitter instead of TMinuit for AliMUONTrack::Fit
107* no parameter for AliMUONTrack::Fit() but more fit parameters in Track object
108
956019b6 109Revision 1.7 2000/07/03 12:28:06 gosset
110Printout at the right place after extrapolation to vertex
111
6ae236ee 112Revision 1.6 2000/06/30 12:01:06 gosset
113Correction for hit search in the right chamber (JPC)
114
d82671a0 115Revision 1.5 2000/06/30 10:15:48 gosset
116Changes to EventReconstructor...:
117precision fit with multiple Coulomb scattering;
118extrapolation to vertex with Branson correction in absorber (JPC)
119
04b5ea16 120Revision 1.4 2000/06/27 14:11:36 gosset
121Corrections against violations of coding conventions
122
9cbdf048 123Revision 1.3 2000/06/16 07:27:08 gosset
124To remove problem in running RuleChecker, like in MUON-dev
125
79e1e601 126Revision 1.1.2.5 2000/06/16 07:00:26 gosset
127To remove problem in running RuleChecker
128
a9e2aefa 129Revision 1.1.2.4 2000/06/12 08:00:07 morsch
130Dummy streamer to solve CINT compilation problem (to be investigated !)
131
132Revision 1.1.2.3 2000/06/09 20:59:57 morsch
133Make includes consistent with new file structure.
134
135Revision 1.1.2.2 2000/06/09 12:58:05 gosset
136Removed comment beginnings in Log sections of .cxx files
137Suppressed most violations of coding rules
138
139Revision 1.1.2.1 2000/06/07 14:44:53 gosset
140Addition of files for track reconstruction in C++
141*/
142
3831f268 143////////////////////////////////////
a9e2aefa 144//
145// MUON event reconstructor in ALICE
146//
147// This class contains as data:
148// * the parameters for the event reconstruction
149// * a pointer to the array of hits to be reconstructed (the event)
150// * a pointer to the array of segments made with these hits inside each station
151// * a pointer to the array of reconstructed tracks
152//
153// It contains as methods, among others:
154// * MakeEventToBeReconstructed to build the array of hits to be reconstructed
155// * MakeSegments to build the segments
156// * MakeTracks to build the tracks
3831f268 157//
158////////////////////////////////////
a9e2aefa 159
3831f268 160#include <iostream.h> // for cout
82a4bc7b 161#include <stdlib.h> // for exit()
a9e2aefa 162
94de3818 163#include <TTree.h>
a9e2aefa 164
a9e2aefa 165#include "AliMUON.h"
3831f268 166#include "AliMUONChamber.h"
167#include "AliMUONEventReconstructor.h"
a9e2aefa 168#include "AliMUONHitForRec.h"
a9e2aefa 169#include "AliMUONRawCluster.h"
3831f268 170#include "AliMUONRecoEvent.h"
171#include "AliMUONSegment.h"
a9e2aefa 172#include "AliMUONTrack.h"
a9e2aefa 173#include "AliMUONTrackHit.h"
94de3818 174#include "AliMagF.h"
3831f268 175#include "AliRun.h" // for gAlice
a9e2aefa 176
a9e2aefa 177//************* Defaults parameters for reconstruction
9cbdf048 178static const Double_t kDefaultMinBendingMomentum = 3.0;
d0bfce8d 179static const Double_t kDefaultMaxBendingMomentum = 500.0;
180static const Double_t kDefaultMaxChi2 = 100.0;
9cbdf048 181static const Double_t kDefaultMaxSigma2Distance = 16.0;
182static const Double_t kDefaultBendingResolution = 0.01;
183static const Double_t kDefaultNonBendingResolution = 0.144;
184static const Double_t kDefaultChamberThicknessInX0 = 0.03;
a9e2aefa 185// Simple magnetic field:
186// Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG
187// Length and Position from reco_muon.F, with opposite sign:
188// Length = ZMAGEND-ZCOIL
189// Position = (ZMAGEND+ZCOIL)/2
190// to be ajusted differently from real magnetic field ????
9cbdf048 191static const Double_t kDefaultSimpleBValue = 7.0;
192static const Double_t kDefaultSimpleBLength = 428.0;
193static const Double_t kDefaultSimpleBPosition = 1019.0;
194static const Int_t kDefaultRecGeantHits = 0;
195static const Double_t kDefaultEfficiency = 0.95;
a9e2aefa 196
9cbdf048 197static const Int_t kDefaultPrintLevel = 0;
a9e2aefa 198
199ClassImp(AliMUONEventReconstructor) // Class implementation in ROOT context
200
201 //__________________________________________________________________________
202AliMUONEventReconstructor::AliMUONEventReconstructor(void)
203{
204 // Constructor for class AliMUONEventReconstructor
205 SetReconstructionParametersToDefaults();
206 // Memory allocation for the TClonesArray of hits for reconstruction
207 // Is 10000 the right size ????
208 fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000);
209 fNHitsForRec = 0; // really needed or GetEntriesFast sufficient ????
210 // Memory allocation for the TClonesArray's of segments in stations
211 // Is 2000 the right size ????
9cbdf048 212 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 213 fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000);
214 fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ????
215 }
216 // Memory allocation for the TClonesArray of reconstructed tracks
217 // Is 10 the right size ????
218 fRecTracksPtr = new TClonesArray("AliMUONTrack", 10);
219 fNRecTracks = 0; // really needed or GetEntriesFast sufficient ????
8429a5e4 220 // Memory allocation for the TClonesArray of hits on reconstructed tracks
221 // Is 100 the right size ????
222 fRecTrackHitsPtr = new TClonesArray("AliMUONTrack", 100);
223 fNRecTrackHits = 0; // really needed or GetEntriesFast sufficient ????
a9e2aefa 224
065bd0e1 225 // Sign of fSimpleBValue according to sign of Bx value at (50,50,950).
a6f03ddb 226 Float_t b[3], x[3];
227 x[0] = 50.; x[1] = 50.; x[2] = 950.;
228 gAlice->Field()->Field(x, b);
065bd0e1 229 fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]);
a6f03ddb 230 // See how to get fSimple(BValue, BLength, BPosition)
231 // automatically calculated from the actual magnetic field ????
a9e2aefa 232
233 if (fPrintLevel >= 0) {
a6f03ddb 234 cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump();
235 cout << endl << "Magnetic field from root file:" << endl;
236 gAlice->Field()->Dump();
237 cout << endl;
238 }
c7ba256d 239
47a6b602 240 // Initializions for GEANT background events
241 fBkgGeantFile = 0;
242 fBkgGeantTK = 0;
243 fBkgGeantParticles = 0;
244 fBkgGeantTH = 0;
245 fBkgGeantHits = 0;
246 fBkgGeantEventNumber = -1;
247
c7ba256d 248 // Initialize to 0 pointers to RecoEvent, tree and tree file
249 fRecoEvent = 0;
250 fEventTree = 0;
251 fTreeFile = 0;
252
a9e2aefa 253 return;
254}
255
9cbdf048 256AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& Reconstructor)
257{
258 // Dummy copy constructor
259}
260
261AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& Reconstructor)
262{
263 // Dummy assignment operator
264 return *this;
265}
266
a9e2aefa 267 //__________________________________________________________________________
268AliMUONEventReconstructor::~AliMUONEventReconstructor(void)
269{
270 // Destructor for class AliMUONEventReconstructor
c7ba256d 271 if (fTreeFile) {
272 fTreeFile->Close();
273 delete fTreeFile;
274 }
275// if (fEventTree) delete fEventTree;
276 if (fRecoEvent) delete fRecoEvent;
a9e2aefa 277 delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ????
9cbdf048 278 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 279 delete fSegmentsPtr[st]; // Correct destruction of everything ????
280 return;
281}
282
283 //__________________________________________________________________________
284void AliMUONEventReconstructor::SetReconstructionParametersToDefaults(void)
285{
286 // Set reconstruction parameters to default values
287 // Would be much more convenient with a structure (or class) ????
9cbdf048 288 fMinBendingMomentum = kDefaultMinBendingMomentum;
d0bfce8d 289 fMaxBendingMomentum = kDefaultMaxBendingMomentum;
290 fMaxChi2 = kDefaultMaxChi2;
9cbdf048 291 fMaxSigma2Distance = kDefaultMaxSigma2Distance;
a9e2aefa 292
9cbdf048 293 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON");
a9e2aefa 294 // ******** Parameters for making HitsForRec
295 // minimum radius,
296 // like in TRACKF_STAT:
297 // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3;
298 // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9
9cbdf048 299 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
300 if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
a9e2aefa 301 2.0 * TMath::Pi() / 180.0;
302 else fRMin[ch] = 30.0;
d0bfce8d 303 // maximum radius at 10 degrees and Z of chamber
304 fRMax[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
305 10.0 * TMath::Pi() / 180.0;
a9e2aefa 306 }
a9e2aefa 307
308 // ******** Parameters for making segments
309 // should be parametrized ????
310 // according to interval between chambers in a station ????
311 // Maximum distance in non bending plane
312 // 5 * 0.22 just to remember the way it was made in TRACKF_STAT
313 // SIGCUT*DYMAX(IZ)
9cbdf048 314 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 315 fSegmentMaxDistNonBending[st] = 5. * 0.22;
860cef81 316 // Maximum distance in bending plane:
317 // values from TRACKF_STAT, corresponding to (J psi 20cm),
318 // scaled to the real distance between chambers in a station
319 fSegmentMaxDistBending[0] = 1.5 *
320 ((&(pMUON->Chamber(1)))->Z() - (&(pMUON->Chamber(0)))->Z()) / 20.0;
321 fSegmentMaxDistBending[1] = 1.5 *
322 ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0;
323 fSegmentMaxDistBending[2] = 3.0 *
324 ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0;
325 fSegmentMaxDistBending[3] = 6.0 *
326 ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0;
327 fSegmentMaxDistBending[4] = 6.0 *
328 ((&(pMUON->Chamber(9)))->Z() - (&(pMUON->Chamber(8)))->Z()) / 20.0;
a9e2aefa 329
9cbdf048 330 fBendingResolution = kDefaultBendingResolution;
331 fNonBendingResolution = kDefaultNonBendingResolution;
332 fChamberThicknessInX0 = kDefaultChamberThicknessInX0;
333 fSimpleBValue = kDefaultSimpleBValue;
334 fSimpleBLength = kDefaultSimpleBLength;
335 fSimpleBPosition = kDefaultSimpleBPosition;
336 fRecGeantHits = kDefaultRecGeantHits;
337 fEfficiency = kDefaultEfficiency;
338 fPrintLevel = kDefaultPrintLevel;
a9e2aefa 339 return;
340}
341
342//__________________________________________________________________________
3831f268 343Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const
a9e2aefa 344{
345 // Returns impact parameter at vertex in bending plane (cm),
346 // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c),
347 // using simple values for dipole magnetic field.
065bd0e1 348 // The sign of "BendingMomentum" is the sign of the charge.
a9e2aefa 349 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
350 BendingMomentum);
351}
352
353//__________________________________________________________________________
3831f268 354Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const
a9e2aefa 355{
356 // Returns signed bending momentum in bending plane (GeV/c),
065bd0e1 357 // the sign being the sign of the charge for particles moving forward in Z,
a9e2aefa 358 // from the impact parameter "ImpactParam" at vertex in bending plane (cm),
359 // using simple values for dipole magnetic field.
a9e2aefa 360 return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
361 ImpactParam);
362}
363
364//__________________________________________________________________________
365void AliMUONEventReconstructor::SetBkgGeantFile(Text_t *BkgGeantFileName)
366{
367 // Set background file ... for GEANT hits
368 // Must be called after having loaded the firts signal event
369 if (fPrintLevel >= 0) {
370 cout << "Enter SetBkgGeantFile with BkgGeantFileName ``"
371 << BkgGeantFileName << "''" << endl;}
372 if (strlen(BkgGeantFileName)) {
373 // BkgGeantFileName not empty: try to open the file
374 if (fPrintLevel >= 2) {cout << "Before File(Bkg)" << endl; gDirectory->Dump();}
375 fBkgGeantFile = new TFile(BkgGeantFileName);
376 if (fPrintLevel >= 2) {cout << "After File(Bkg)" << endl; gDirectory->Dump();}
377 if (fBkgGeantFile-> IsOpen()) {
378 if (fPrintLevel >= 0) {
379 cout << "Background for GEANT hits in file: ``" << BkgGeantFileName
380 << "'' successfully opened" << endl;}
381 }
382 else {
383 cout << "Background for GEANT hits in file: " << BkgGeantFileName << endl;
384 cout << "NOT FOUND: EXIT" << endl;
385 exit(0); // right instruction for exit ????
386 }
387 // Arrays for "particles" and "hits"
388 fBkgGeantParticles = new TClonesArray("TParticle", 200);
389 fBkgGeantHits = new TClonesArray("AliMUONHit", 2000);
390 // Event number to -1 for initialization
391 fBkgGeantEventNumber = -1;
392 // Back to the signal file:
393 // first signal event must have been loaded previously,
394 // otherwise, Segmentation violation at the next instruction
395 // How is it possible to do smething better ????
396 ((gAlice->TreeK())->GetCurrentFile())->cd();
397 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
398 }
399 return;
400}
401
402//__________________________________________________________________________
403void AliMUONEventReconstructor::NextBkgGeantEvent(void)
404{
405 // Get next event in background file for GEANT hits
406 // Goes back to event number 0 when end of file is reached
407 char treeName[20];
408 TBranch *branch;
409 if (fPrintLevel >= 0) {
410 cout << "Enter NextBkgGeantEvent" << endl;}
411 // Clean previous event
412 if(fBkgGeantTK) delete fBkgGeantTK;
413 fBkgGeantTK = NULL;
414 if(fBkgGeantParticles) fBkgGeantParticles->Clear();
415 if(fBkgGeantTH) delete fBkgGeantTH;
416 fBkgGeantTH = NULL;
417 if(fBkgGeantHits) fBkgGeantHits->Clear();
418 // Increment event number
419 fBkgGeantEventNumber++;
420 // Get access to Particles and Hits for event from background file
421 if (fPrintLevel >= 2) {cout << "Before cd(Bkg)" << endl; gDirectory->Dump();}
422 fBkgGeantFile->cd();
423 if (fPrintLevel >= 2) {cout << "After cd(Bkg)" << endl; gDirectory->Dump();}
424 // Particles: TreeK for event and branch "Particles"
425 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
426 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
427 if (!fBkgGeantTK) {
428 if (fPrintLevel >= 0) {
429 cout << "Cannot find Kine Tree for background event: " <<
430 fBkgGeantEventNumber << endl;
431 cout << "Goes back to event 0" << endl;
432 }
433 fBkgGeantEventNumber = 0;
434 sprintf(treeName, "TreeK%d", fBkgGeantEventNumber);
435 fBkgGeantTK = (TTree*)gDirectory->Get(treeName);
436 if (!fBkgGeantTK) {
437 cout << "ERROR: cannot find Kine Tree for background event: " <<
438 fBkgGeantEventNumber << endl;
439 exit(0);
440 }
441 }
442 if (fBkgGeantTK)
443 fBkgGeantTK->SetBranchAddress("Particles", &fBkgGeantParticles);
444 fBkgGeantTK->GetEvent(0); // why event 0 ???? necessary ????
445 // Hits: TreeH for event and branch "MUON"
446 sprintf(treeName, "TreeH%d", fBkgGeantEventNumber);
447 fBkgGeantTH = (TTree*)gDirectory->Get(treeName);
448 if (!fBkgGeantTH) {
449 cout << "ERROR: cannot find Hits Tree for background event: " <<
450 fBkgGeantEventNumber << endl;
451 exit(0);
452 }
453 if (fBkgGeantTH && fBkgGeantHits) {
454 branch = fBkgGeantTH->GetBranch("MUON");
455 if (branch) branch->SetAddress(&fBkgGeantHits);
456 }
457 fBkgGeantTH->GetEntries(); // necessary ????
458 // Back to the signal file
459 ((gAlice->TreeK())->GetCurrentFile())->cd();
460 if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();}
461 return;
462}
463
464//__________________________________________________________________________
465void AliMUONEventReconstructor::EventReconstruct(void)
466{
467 // To reconstruct one event
468 if (fPrintLevel >= 1) cout << "enter EventReconstruct" << endl;
469 MakeEventToBeReconstructed();
470 MakeSegments();
471 MakeTracks();
472 return;
473}
474
475 //__________________________________________________________________________
476void AliMUONEventReconstructor::ResetHitsForRec(void)
477{
478 // To reset the array and the number of HitsForRec,
479 // and also the number of HitsForRec
480 // and the index of the first HitForRec per chamber
481 if (fHitsForRecPtr) fHitsForRecPtr->Clear();
482 fNHitsForRec = 0;
9cbdf048 483 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++)
a9e2aefa 484 fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0;
485 return;
486}
487
488 //__________________________________________________________________________
489void AliMUONEventReconstructor::ResetSegments(void)
490{
491 // To reset the TClonesArray of segments and the number of Segments
492 // for all stations
9cbdf048 493 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 494 if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear();
495 fNSegments[st] = 0;
496 }
497 return;
498}
499
500 //__________________________________________________________________________
501void AliMUONEventReconstructor::ResetTracks(void)
502{
503 // To reset the TClonesArray of reconstructed tracks
8429a5e4 504 if (fRecTracksPtr) fRecTracksPtr->Delete();
505 // Delete in order that the Track destructors are called,
506 // hence the space for the TClonesArray of pointers to TrackHit's is freed
a9e2aefa 507 fNRecTracks = 0;
508 return;
509}
510
8429a5e4 511 //__________________________________________________________________________
512void AliMUONEventReconstructor::ResetTrackHits(void)
513{
514 // To reset the TClonesArray of hits on reconstructed tracks
515 if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear();
516 fNRecTrackHits = 0;
517 return;
518}
519
a9e2aefa 520 //__________________________________________________________________________
521void AliMUONEventReconstructor::MakeEventToBeReconstructed(void)
522{
523 // To make the list of hits to be reconstructed,
524 // either from the GEANT hits or from the raw clusters
525 // according to the parameter set for the reconstructor
526 if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl;
527 ResetHitsForRec();
528 if (fRecGeantHits == 1) {
529 // Reconstruction from GEANT hits
530 // Back to the signal file
531 ((gAlice->TreeK())->GetCurrentFile())->cd();
532 // Signal hits
533 // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
534 // Security on MUON ????
535 AddHitsForRecFromGEANT(gAlice->TreeH());
536 // Background hits
537 AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits);
538 // Sort HitsForRec in increasing order with respect to chamber number
539 SortHitsForRecWithIncreasingChamber();
540 }
541 else {
542 // Reconstruction from raw clusters
543 // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
544 // Security on MUON ????
545 // TreeR assumed to be be "prepared" in calling function
546 // by "MUON->GetTreeR(nev)" ????
9cbdf048 547 TTree *treeR = gAlice->TreeR();
548 AddHitsForRecFromRawClusters(treeR);
a9e2aefa 549 // No sorting: it is done automatically in the previous function
550 }
551 if (fPrintLevel >= 10) {
552 cout << "end of MakeEventToBeReconstructed" << endl;
553 cout << "NHitsForRec: " << fNHitsForRec << endl;
9cbdf048 554 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 555 cout << "chamber(0...): " << ch
556 << " NHitsForRec: " << fNHitsForRecPerChamber[ch]
557 << " index(first HitForRec): " << fIndexOfFirstHitForRecPerChamber[ch]
558 << endl;
559 for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch];
560 hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch];
561 hit++) {
562 cout << "HitForRec index(0...): " << hit << endl;
563 ((*fHitsForRecPtr)[hit])->Dump();
564 }
565 }
566 }
567 return;
568}
569
570 //__________________________________________________________________________
571void AliMUONEventReconstructor::AddHitsForRecFromGEANT(TTree *TH)
572{
573 // To add to the list of hits for reconstruction
574 // the GEANT signal hits from a hit tree TH.
575 if (fPrintLevel >= 2)
576 cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl;
577 if (TH == NULL) return;
9cbdf048 578 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 579 // Security on MUON ????
580 // See whether it could be the same for signal and background ????
581 // Loop over tracks in tree
582 Int_t ntracks = (Int_t) TH->GetEntries();
583 if (fPrintLevel >= 2)
584 cout << "ntracks: " << ntracks << endl;
585 for (Int_t track = 0; track < ntracks; track++) {
586 gAlice->ResetHits();
587 TH->GetEvent(track);
588 // Loop over hits
589 Int_t hit = 0;
9cbdf048 590 for (AliMUONHit* mHit = (AliMUONHit*) pMUON->FirstHit(-1);
a9e2aefa 591 mHit;
9cbdf048 592 mHit = (AliMUONHit*) pMUON->NextHit(), hit++) {
a9e2aefa 593 NewHitForRecFromGEANT(mHit,track, hit, 1);
594 } // end of hit loop
595 } // end of track loop
596 return;
597}
598
599 //__________________________________________________________________________
600void AliMUONEventReconstructor::AddHitsForRecFromBkgGEANT(TTree *TH, TClonesArray *Hits)
601{
602 // To add to the list of hits for reconstruction
603 // the GEANT background hits from a hit tree TH and a pointer Hits to a hit list.
604 // How to have only one function "AddHitsForRecFromGEANT" ????
605 if (fPrintLevel >= 2)
606 cout << "enter AddHitsForRecFromBkgGEANT with TH: " << TH << endl;
607 if (TH == NULL) return;
608 // Loop over tracks in tree
609 Int_t ntracks = (Int_t) TH->GetEntries();
610 if (fPrintLevel >= 2)
611 cout << "ntracks: " << ntracks << endl;
612 for (Int_t track = 0; track < ntracks; track++) {
613 if (Hits) Hits->Clear();
614 TH->GetEvent(track);
615 // Loop over hits
616 for (Int_t hit = 0; hit < Hits->GetEntriesFast(); hit++) {
617 NewHitForRecFromGEANT((AliMUONHit*) (*Hits)[hit], track, hit, 0);
618 } // end of hit loop
619 } // end of track loop
620 return;
621}
622
623 //__________________________________________________________________________
624AliMUONHitForRec* AliMUONEventReconstructor::NewHitForRecFromGEANT(AliMUONHit* Hit, Int_t TrackNumber, Int_t HitNumber, Int_t Signal)
625{
626 // To make a new hit for reconstruction from a GEANT hit pointed to by "Hit",
627 // with hit number "HitNumber" in the track numbered "TrackNumber",
628 // either from signal ("Signal" = 1) or background ("Signal" = 0) event.
629 // Selects hits in tracking (not trigger) chambers.
630 // Takes into account the efficiency (fEfficiency)
631 // and the smearing from resolution (fBendingResolution and fNonBendingResolution).
632 // Adds a condition on the radius between RMin and RMax
633 // to better simulate the real chambers.
634 // Returns the pointer to the new hit for reconstruction,
635 // or NULL in case of inefficiency or non tracking chamber or bad radius.
636 // No condition on at most 20 cm from a muon from a resonance
637 // like in Fortran TRACKF_STAT.
638 AliMUONHitForRec* hitForRec;
639 Double_t bendCoor, nonBendCoor, radius;
0a5f36d9 640 Int_t chamber = Hit->Chamber() - 1; // chamber(0...)
a9e2aefa 641 // only in tracking chambers (fChamber starts at 1)
9cbdf048 642 if (chamber >= kMaxMuonTrackingChambers) return NULL;
a9e2aefa 643 // only if hit is efficient (keep track for checking ????)
644 if (gRandom->Rndm() > fEfficiency) return NULL;
645 // only if radius between RMin and RMax
94de3818 646 bendCoor = Hit->Y();
647 nonBendCoor = Hit->X();
a9e2aefa 648 radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor));
d0bfce8d 649 // This cut is not needed with a realistic chamber geometry !!!!
650// if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL;
a9e2aefa 651 // new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's
652 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit);
653 fNHitsForRec++;
654 // add smearing from resolution
655 hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution));
656 hitForRec->SetNonBendingCoor(nonBendCoor
657 + gRandom->Gaus(0., fNonBendingResolution));
d0bfce8d 658// // !!!! without smearing
659// hitForRec->SetBendingCoor(bendCoor);
660// hitForRec->SetNonBendingCoor(nonBendCoor);
a9e2aefa 661 // more information into HitForRec
662 // resolution: angular effect to be added here ????
663 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
664 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
665 // GEANT track info
666 hitForRec->SetHitNumber(HitNumber);
667 hitForRec->SetTHTrack(TrackNumber);
668 hitForRec->SetGeantSignal(Signal);
669 if (fPrintLevel >= 10) {
670 cout << "track: " << TrackNumber << " hit: " << HitNumber << endl;
671 Hit->Dump();
672 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
673 hitForRec->Dump();}
674 return hitForRec;
675}
676
677 //__________________________________________________________________________
678void AliMUONEventReconstructor::SortHitsForRecWithIncreasingChamber()
679{
680 // Sort HitsForRec's in increasing order with respect to chamber number.
681 // Uses the function "Compare".
682 // Update the information for HitsForRec per chamber too.
683 Int_t ch, nhits, prevch;
684 fHitsForRecPtr->Sort();
9cbdf048 685 for (ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 686 fNHitsForRecPerChamber[ch] = 0;
687 fIndexOfFirstHitForRecPerChamber[ch] = 0;
688 }
689 prevch = 0; // previous chamber
690 nhits = 0; // number of hits in current chamber
691 // Loop over HitsForRec
692 for (Int_t hit = 0; hit < fNHitsForRec; hit++) {
693 // chamber number (0...)
694 ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber();
695 // increment number of hits in current chamber
696 (fNHitsForRecPerChamber[ch])++;
697 // update index of first HitForRec in current chamber
698 // if chamber number different from previous one
699 if (ch != prevch) {
700 fIndexOfFirstHitForRecPerChamber[ch] = hit;
701 prevch = ch;
702 }
703 }
704 return;
705}
706
707// //__________________________________________________________________________
708// void AliMUONEventReconstructor::AddHitsForRecFromCathodeCorrelations(TTree* TC)
709// {
710// // OLD VERSION WHEN ONE ONE WAS USING SO CALLED CATHODE CORRELATIONS
711// // To add to the list of hits for reconstruction
712// // the (cathode correlated) raw clusters
713// // No condition added, like in Fortran TRACKF_STAT,
714// // on the radius between RMin and RMax.
715// AliMUONHitForRec *hitForRec;
716// if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromCathodeCorrelations" << endl;
717// AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
718// // Security on MUON ????
719// // Loop over tracking chambers
9cbdf048 720// for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 721// // number of HitsForRec to 0 for the chamber
722// fNHitsForRecPerChamber[ch] = 0;
723// // index of first HitForRec for the chamber
724// if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
725// else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
726// TClonesArray *reconst_hits = MUON->ReconstHitsAddress(ch);
727// MUON->ResetReconstHits();
728// TC->GetEvent();
729// Int_t ncor = (Int_t)reconst_hits->GetEntries();
730// // Loop over (cathode correlated) raw clusters
731// for (Int_t cor = 0; cor < ncor; cor++) {
732// AliMUONReconstHit * mCor =
733// (AliMUONReconstHit*) reconst_hits->UncheckedAt(cor);
734// // new AliMUONHitForRec from (cathode correlated) raw cluster
735// // and increment number of AliMUONHitForRec's (total and in chamber)
736// hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(mCor);
737// fNHitsForRec++;
738// (fNHitsForRecPerChamber[ch])++;
739// // more information into HitForRec
740// hitForRec->SetChamberNumber(ch);
741// hitForRec->SetHitNumber(cor);
742// // Z coordinate of the chamber (cm) with sign opposite to GEANT sign
743// // could (should) be more exact from chamber geometry ????
744// hitForRec->SetZ(-(&(MUON->Chamber(ch)))->Z());
745// if (fPrintLevel >= 10) {
746// cout << "chamber (0...): " << ch <<
747// " cathcorrel (0...): " << cor << endl;
748// mCor->Dump();
749// cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
750// hitForRec->Dump();}
751// } // end of cluster loop
752// } // end of chamber loop
753// return;
754// }
755
756 //__________________________________________________________________________
757void AliMUONEventReconstructor::AddHitsForRecFromRawClusters(TTree* TR)
758{
759 // To add to the list of hits for reconstruction all the raw clusters
760 // No condition added, like in Fortran TRACKF_STAT,
761 // on the radius between RMin and RMax.
762 AliMUONHitForRec *hitForRec;
763 AliMUONRawCluster *clus;
f69d51b5 764 Int_t iclus, nclus, nTRentries;
a9e2aefa 765 TClonesArray *rawclusters;
766 if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl;
9cbdf048 767 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 768 // Security on MUON ????
f69d51b5 769 pMUON->ResetRawClusters();
770 nTRentries = Int_t(TR->GetEntries());
771 if (nTRentries != 1) {
772 cout << "Error in AliMUONEventReconstructor::AddHitsForRecFromRawClusters"
773 << endl;
774 cout << "nTRentries = " << nTRentries << " not equal to 1" << endl;
775 exit(0);
776 }
777 TR->GetEvent(0); // only one entry
a9e2aefa 778 // Loop over tracking chambers
9cbdf048 779 for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
a9e2aefa 780 // number of HitsForRec to 0 for the chamber
781 fNHitsForRecPerChamber[ch] = 0;
782 // index of first HitForRec for the chamber
783 if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
784 else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
9cbdf048 785 rawclusters = pMUON->RawClustAddress(ch);
f69d51b5 786// pMUON->ResetRawClusters();
787// TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ????
a9e2aefa 788 nclus = (Int_t) (rawclusters->GetEntries());
789 // Loop over (cathode correlated) raw clusters
790 for (iclus = 0; iclus < nclus; iclus++) {
791 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus);
792 // new AliMUONHitForRec from raw cluster
793 // and increment number of AliMUONHitForRec's (total and in chamber)
794 hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus);
795 fNHitsForRec++;
796 (fNHitsForRecPerChamber[ch])++;
797 // more information into HitForRec
798 // resolution: info should be already in raw cluster and taken from it ????
799 hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
800 hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution);
801 // original raw cluster
802 hitForRec->SetChamberNumber(ch);
803 hitForRec->SetHitNumber(iclus);
ba5b68db 804 // Z coordinate of the raw cluster (cm)
cfe0107f 805 hitForRec->SetZ(clus->fZ[0]);
a9e2aefa 806 if (fPrintLevel >= 10) {
807 cout << "chamber (0...): " << ch <<
808 " raw cluster (0...): " << iclus << endl;
809 clus->Dump();
810 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
811 hitForRec->Dump();}
812 } // end of cluster loop
813 } // end of chamber loop
814 return;
815}
816
817 //__________________________________________________________________________
818void AliMUONEventReconstructor::MakeSegments(void)
819{
820 // To make the list of segments in all stations,
821 // from the list of hits to be reconstructed
822 if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl;
823 ResetSegments();
824 // Loop over stations
9cbdf048 825 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
a9e2aefa 826 MakeSegmentsPerStation(st);
827 if (fPrintLevel >= 10) {
828 cout << "end of MakeSegments" << endl;
9cbdf048 829 for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) {
a9e2aefa 830 cout << "station(0...): " << st
831 << " Segments: " << fNSegments[st]
832 << endl;
833 for (Int_t seg = 0;
834 seg < fNSegments[st];
835 seg++) {
836 cout << "Segment index(0...): " << seg << endl;
837 ((*fSegmentsPtr[st])[seg])->Dump();
838 }
839 }
840 }
841 return;
842}
843
844 //__________________________________________________________________________
845void AliMUONEventReconstructor::MakeSegmentsPerStation(Int_t Station)
846{
847 // To make the list of segments in station number "Station" (0...)
848 // from the list of hits to be reconstructed.
849 // Updates "fNSegments"[Station].
850 // Segments in stations 4 and 5 are sorted
851 // according to increasing absolute value of "impact parameter"
852 AliMUONHitForRec *hit1Ptr, *hit2Ptr;
853 AliMUONSegment *segment;
854 Bool_t last2st;
855 Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor,
d0bfce8d 856 impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings.
9cbdf048 857 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
a9e2aefa 858 if (fPrintLevel >= 1)
859 cout << "enter MakeSegmentsPerStation (0...) " << Station << endl;
860 // first and second chambers (0...) in the station
861 Int_t ch1 = 2 * Station;
862 Int_t ch2 = ch1 + 1;
863 // variable true for stations downstream of the dipole:
864 // Station(0..4) equal to 3 or 4
865 if ((Station == 3) || (Station == 4)) {
866 last2st = kTRUE;
867 // maximum impact parameter (cm) according to fMinBendingMomentum...
868 maxImpactParam =
869 TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum));
d0bfce8d 870 // minimum impact parameter (cm) according to fMaxBendingMomentum...
871 minImpactParam =
872 TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum));
a9e2aefa 873 }
874 else last2st = kFALSE;
875 // extrapolation factor from Z of first chamber to Z of second chamber
876 // dZ to be changed to take into account fine structure of chambers ????
877 Double_t extrapFact =
9cbdf048 878 (&(pMUON->Chamber(ch2)))->Z() / (&(pMUON->Chamber(ch1)))->Z();
a9e2aefa 879 // index for current segment
880 Int_t segmentIndex = 0;
881 // Loop over HitsForRec in the first chamber of the station
882 for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1];
883 hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1];
884 hit1++) {
885 // pointer to the HitForRec
886 hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]);
887 // extrapolation,
888 // on the straight line joining the HitForRec to the vertex (0,0,0),
889 // to the Z of the second chamber of the station
890 extBendCoor = extrapFact * hit1Ptr->GetBendingCoor();
891 extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor();
892 // Loop over HitsForRec in the second chamber of the station
893 for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2];
894 hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2];
895 hit2++) {
896 // pointer to the HitForRec
897 hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]);
898 // absolute values of distances, in bending and non bending planes,
899 // between the HitForRec in the second chamber
900 // and the previous extrapolation
901 distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor);
902 distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor);
903 if (last2st) {
904 // bending slope
905 bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) /
906 (hit1Ptr->GetZ() - hit2Ptr->GetZ());
907 // absolute value of impact parameter
908 impactParam =
909 TMath::Abs(hit1Ptr->GetBendingCoor() - hit2Ptr->GetZ() * bendingSlope);
910 }
911 // check for distances not too large,
912 // and impact parameter not too big if stations downstream of the dipole.
913 // Conditions "distBend" and "impactParam" correlated for these stations ????
914 if ((distBend < fSegmentMaxDistBending[Station]) &&
915 (distNonBend < fSegmentMaxDistNonBending[Station]) &&
d0bfce8d 916 (!last2st || (impactParam < maxImpactParam)) &&
917 (!last2st || (impactParam > minImpactParam))) {
a9e2aefa 918 // make new segment
919 segment = new ((*fSegmentsPtr[Station])[segmentIndex])
920 AliMUONSegment(hit1Ptr, hit2Ptr);
921 // update "link" to this segment from the hit in the first chamber
922 if (hit1Ptr->GetNSegments() == 0)
923 hit1Ptr->SetIndexOfFirstSegment(segmentIndex);
924 hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1);
925 if (fPrintLevel >= 10) {
926 cout << "segmentIndex(0...): " << segmentIndex
927 << " distBend: " << distBend
928 << " distNonBend: " << distNonBend
929 << endl;
930 segment->Dump();
931 cout << "HitForRec in first chamber" << endl;
932 hit1Ptr->Dump();
933 cout << "HitForRec in second chamber" << endl;
934 hit2Ptr->Dump();
935 };
936 // increment index for current segment
937 segmentIndex++;
938 }
939 } //for (Int_t hit2
940 } // for (Int_t hit1...
941 fNSegments[Station] = segmentIndex;
942 // Sorting according to "impact parameter" if station(1..5) 4 or 5,
943 // i.e. Station(0..4) 3 or 4, using the function "Compare".
944 // After this sorting, it is impossible to use
945 // the "fNSegments" and "fIndexOfFirstSegment"
946 // of the HitForRec in the first chamber to explore all segments formed with it.
947 // Is this sorting really needed ????
948 if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort();
949 if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: "
950 << fNSegments[Station] << endl;
951 return;
952}
953
954 //__________________________________________________________________________
955void AliMUONEventReconstructor::MakeTracks(void)
956{
957 // To make the tracks,
958 // from the list of segments and points in all stations
959 if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl;
8429a5e4 960 // The order may be important for the following Reset's
a9e2aefa 961 ResetTracks();
8429a5e4 962 ResetTrackHits();
a9e2aefa 963 // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
964 MakeTrackCandidates();
965 // Follow tracks in stations(1..) 3, 2 and 1
966 FollowTracks();
8429a5e4 967 // Remove double tracks
968 RemoveDoubleTracks();
a9e2aefa 969 return;
970}
971
972 //__________________________________________________________________________
973Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment)
974{
975 // To make track candidates with two segments in stations(1..) 4 and 5,
976 // the first segment being pointed to by "BegSegment".
977 // Returns the number of such track candidates.
978 Int_t endStation, iEndSegment, nbCan2Seg;
979 AliMUONSegment *endSegment, *extrapSegment;
980 AliMUONTrack *recTrack;
981 Double_t mcsFactor;
982 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl;
983 // Station for the end segment
984 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
985 // multiple scattering factor corresponding to one chamber
986 mcsFactor = 0.0136 /
987 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
988 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
989 // linear extrapolation to end station
990 extrapSegment =
991 BegSegment->CreateSegmentFromLinearExtrapToStation(endStation, mcsFactor);
992 // number of candidates with 2 segments to 0
993 nbCan2Seg = 0;
994 // Loop over segments in the end station
995 for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) {
996 // pointer to segment
997 endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]);
998 // test compatibility between current segment and "extrapSegment"
04b5ea16 999 // 4 because 4 quantities in chi2
a9e2aefa 1000 if ((endSegment->
1001 NormalizedChi2WithSegment(extrapSegment,
1002 fMaxSigma2Distance)) <= 4.0) {
1003 // both segments compatible:
1004 // make track candidate from "begSegment" and "endSegment"
1005 if (fPrintLevel >= 2)
1006 cout << "TrackCandidate with Segment " << iEndSegment <<
1007 " in Station(0..) " << endStation << endl;
1008 // flag for both segments in one track:
1009 // to be done in track constructor ????
1010 BegSegment->SetInTrack(kTRUE);
1011 endSegment->SetInTrack(kTRUE);
1012 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1013 AliMUONTrack(BegSegment, endSegment, this);
1014 fNRecTracks++;
1015 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1016 // increment number of track candidates with 2 segments
1017 nbCan2Seg++;
1018 }
1019 } // for (iEndSegment = 0;...
1020 delete extrapSegment; // should not delete HitForRec's it points to !!!!
1021 return nbCan2Seg;
1022}
1023
1024 //__________________________________________________________________________
1025Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment)
1026{
1027 // To make track candidates with one segment and one point
1028 // in stations(1..) 4 and 5,
1029 // the segment being pointed to by "BegSegment".
1030 Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit;
1031 AliMUONHitForRec *extrapHitForRec, *hit;
1032 AliMUONTrack *recTrack;
1033 Double_t mcsFactor;
1034 if (fPrintLevel >= 1)
1035 cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl;
1036 // station for the end point
1037 endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2;
1038 // multiple scattering factor corresponding to one chamber
1039 mcsFactor = 0.0136 /
1040 GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact());
1041 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1042 // first and second chambers(0..) in the end station
1043 ch1 = 2 * endStation;
1044 ch2 = ch1 + 1;
1045 // number of candidates to 0
1046 nbCan1Seg1Hit = 0;
1047 // Loop over chambers of the end station
1048 for (ch = ch2; ch >= ch1; ch--) {
1049 // linear extrapolation to chamber
1050 extrapHitForRec =
1051 BegSegment->CreateHitForRecFromLinearExtrapToChamber(ch, mcsFactor);
1052 // limits for the hit index in the loop
1053 iHitMin = fIndexOfFirstHitForRecPerChamber[ch];
1054 iHitMax = iHitMin + fNHitsForRecPerChamber[ch];
1055 // Loop over HitForRec's in the chamber
1056 for (iHit = iHitMin; iHit < iHitMax; iHit++) {
1057 // pointer to HitForRec
1058 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
1059 // test compatibility between current HitForRec and "extrapHitForRec"
04b5ea16 1060 // 2 because 2 quantities in chi2
a9e2aefa 1061 if ((hit->
1062 NormalizedChi2WithHitForRec(extrapHitForRec,
1063 fMaxSigma2Distance)) <= 2.0) {
1064 // both HitForRec's compatible:
1065 // make track candidate from begSegment and current HitForRec
1066 if (fPrintLevel >= 2)
1067 cout << "TrackCandidate with HitForRec " << iHit <<
1068 " in Chamber(0..) " << ch << endl;
1069 // flag for beginning segments in one track:
1070 // to be done in track constructor ????
1071 BegSegment->SetInTrack(kTRUE);
1072 recTrack = new ((*fRecTracksPtr)[fNRecTracks])
1073 AliMUONTrack(BegSegment, hit, this);
1074 // the right place to eliminate "double counting" ???? how ????
1075 fNRecTracks++;
1076 if (fPrintLevel >= 10) recTrack->RecursiveDump();
1077 // increment number of track candidates
1078 nbCan1Seg1Hit++;
1079 }
1080 } // for (iHit = iHitMin;...
1081 delete extrapHitForRec;
1082 } // for (ch = ch2;...
1083 return nbCan1Seg1Hit;
1084}
1085
1086 //__________________________________________________________________________
1087void AliMUONEventReconstructor::MakeTrackCandidates(void)
1088{
1089 // To make track candidates
1090 // with at least 3 aligned points in stations(1..) 4 and 5
1091 // (two Segment's or one Segment and one HitForRec)
1092 Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg;
1093 AliMUONSegment *begSegment;
1094 if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl;
1095 // Loop over stations(1..) 5 and 4 for the beginning segment
1096 for (begStation = 4; begStation > 2; begStation--) {
1097 // Loop over segments in the beginning station
1098 for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) {
1099 // pointer to segment
1100 begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]);
1101 if (fPrintLevel >= 2)
1102 cout << "look for TrackCandidate's with Segment " << iBegSegment <<
1103 " in Station(0..) " << begStation << endl;
1104 // Look for track candidates with two segments,
1105 // "begSegment" and all compatible segments in other station.
1106 // Only for beginning station(1..) 5
1107 // because candidates with 2 segments have to looked for only once.
1108 if (begStation == 4)
1109 nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment);
956019b6 1110 // Look for track candidates with one segment and one point,
a9e2aefa 1111 // "begSegment" and all compatible HitForRec's in other station.
1112 // Only if "begSegment" does not belong already to a track candidate.
1113 // Is that a too strong condition ????
1114 if (!(begSegment->GetInTrack()))
1115 nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment);
1116 } // for (iBegSegment = 0;...
1117 } // for (begStation = 4;...
1118 return;
1119}
1120
1121 //__________________________________________________________________________
1122void AliMUONEventReconstructor::FollowTracks(void)
1123{
1124 // Follow tracks in stations(1..) 3, 2 and 1
04b5ea16 1125 // too long: should be made more modular !!!!
d0bfce8d 1126 AliMUONHitForRec *bestHit, *extrapHit, *extrapCorrHit, *hit;
1127 AliMUONSegment *bestSegment, *extrapSegment, *extrapCorrSegment, *segment;
04b5ea16 1128 AliMUONTrack *track, *nextTrack;
1129 AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex;
ecfa008b 1130 // -1 to avoid compilation warnings
1131 Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex;
04b5ea16 1132 Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor;
d0bfce8d 1133 Double_t bendingMomentum, chi2Norm = 0.;
9cbdf048 1134 AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
04b5ea16 1135 // local maxSigma2Distance, for easy increase in testing
1136 maxSigma2Distance = fMaxSigma2Distance;
a9e2aefa 1137 if (fPrintLevel >= 2)
1138 cout << "enter FollowTracks" << endl;
1139 // Loop over track candidates
04b5ea16 1140 track = (AliMUONTrack*) fRecTracksPtr->First();
1141 trackIndex = -1;
1142 while (track) {
1143 // Follow function for each track candidate ????
1144 trackIndex++;
1145 nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track
a9e2aefa 1146 if (fPrintLevel >= 2)
1147 cout << "FollowTracks: track candidate(0..): " << trackIndex << endl;
956019b6 1148 // Fit track candidate
1149 track->SetFitMCS(0); // without multiple Coulomb scattering
1150 track->SetFitNParam(3); // with 3 parameters (X = Y = 0)
1151 track->SetFitStart(0); // from parameters at vertex
1152 track->Fit();
a9e2aefa 1153 if (fPrintLevel >= 10) {
1154 cout << "FollowTracks: track candidate(0..): " << trackIndex
956019b6 1155 << " after fit in stations(0..) 3 and 4" << endl;
a9e2aefa 1156 track->RecursiveDump();
1157 }
1158 // Loop over stations(1..) 3, 2 and 1
04b5ea16 1159 // something SPECIAL for stations 2 and 1 for majority 3 coincidence ????
1160 // otherwise: majority coincidence 2 !!!!
a9e2aefa 1161 for (station = 2; station >= 0; station--) {
1162 // Track parameters at first track hit (smallest Z)
1163 trackParam1 = ((AliMUONTrackHit*)
1164 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1165 // extrapolation to station
1166 trackParam1->ExtrapToStation(station, trackParam);
79e1e601 1167 extrapSegment = new AliMUONSegment(); // empty segment
d0bfce8d 1168 extrapCorrSegment = new AliMUONSegment(); // empty corrected segment
a9e2aefa 1169 // multiple scattering factor corresponding to one chamber
1170 // and momentum in bending plane (not total)
1171 mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum();
1172 mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor;
1173 // Z difference from previous station
9cbdf048 1174 dZ1 = (&(pMUON->Chamber(2 * station)))->Z() -
1175 (&(pMUON->Chamber(2 * station + 2)))->Z();
a9e2aefa 1176 // Z difference between the two previous stations
9cbdf048 1177 dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() -
1178 (&(pMUON->Chamber(2 * station + 4)))->Z();
04b5ea16 1179 // Z difference between the two chambers in the previous station
1180 dZ3 = (&(pMUON->Chamber(2 * station)))->Z() -
1181 (&(pMUON->Chamber(2 * station + 1)))->Z();
1182 extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1183 extrapSegment->
1184 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1185 extrapSegment->UpdateFromStationTrackParam
1186 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1187 trackParam1->GetInverseBendingMomentum());
d0bfce8d 1188 // same thing for corrected segment
1189 // better to use copy constructor, after checking that it works properly !!!!
1190 extrapCorrSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
1191 extrapCorrSegment->
1192 SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
1193 extrapCorrSegment->UpdateFromStationTrackParam
1194 (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
1195 trackParam1->GetInverseBendingMomentum());
a9e2aefa 1196 bestChi2 = 5.0;
1197 bestSegment = NULL;
1198 if (fPrintLevel >= 10) {
1199 cout << "FollowTracks: track candidate(0..): " << trackIndex
1200 << " Look for segment in station(0..): " << station << endl;
1201 }
1202 // Loop over segments in station
1203 for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) {
1204 // Look for best compatible Segment in station
1205 // should consider all possibilities ????
1206 // multiple scattering ????
1207 // separation in 2 functions: Segment and HitForRec ????
1208 segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]);
d0bfce8d 1209 // correction of corrected segment (fBendingCoor and fNonBendingCoor)
1210 // according to real Z value of "segment" and slopes of "extrapSegment"
1211 extrapCorrSegment->
1212 SetBendingCoor(extrapSegment->GetBendingCoor() +
1213 extrapSegment->GetBendingSlope() *
1214 (segment->GetHitForRec1()->GetZ() -
1215 (&(pMUON->Chamber(2 * station)))->Z()));
1216 extrapCorrSegment->
1217 SetNonBendingCoor(extrapSegment->GetNonBendingCoor() +
1218 extrapSegment->GetNonBendingSlope() *
1219 (segment->GetHitForRec1()->GetZ() -
1220 (&(pMUON->Chamber(2 * station)))->Z()));
1221 chi2 = segment->
1222 NormalizedChi2WithSegment(extrapCorrSegment, maxSigma2Distance);
a9e2aefa 1223 if (chi2 < bestChi2) {
1224 // update best Chi2 and Segment if better found
1225 bestSegment = segment;
1226 bestChi2 = chi2;
1227 }
1228 }
1229 if (bestSegment) {
1230 // best segment found: add it to track candidate
1231 track->AddSegment(bestSegment);
1232 // set track parameters at these two TrakHit's
1233 track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0]));
1234 track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1]));
1235 if (fPrintLevel >= 10) {
1236 cout << "FollowTracks: track candidate(0..): " << trackIndex
1237 << " Added segment in station(0..): " << station << endl;
1238 track->RecursiveDump();
1239 }
1240 }
1241 else {
1242 // No best segment found:
1243 // Look for best compatible HitForRec in station:
1244 // should consider all possibilities ????
1245 // multiple scattering ???? do about like for extrapSegment !!!!
79e1e601 1246 extrapHit = new AliMUONHitForRec(); // empty hit
d0bfce8d 1247 extrapCorrHit = new AliMUONHitForRec(); // empty corrected hit
a9e2aefa 1248 bestChi2 = 3.0;
1249 bestHit = NULL;
1250 if (fPrintLevel >= 10) {
1251 cout << "FollowTracks: track candidate(0..): " << trackIndex
1252 << " Segment not found, look for hit in station(0..): " << station
1253 << endl;
1254 }
1255 // Loop over chambers of the station
d82671a0 1256 for (chInStation = 0; chInStation < 2; chInStation++) {
a9e2aefa 1257 // coordinates of extrapolated hit
d82671a0 1258 extrapHit->
1259 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1260 extrapHit->
1261 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
a9e2aefa 1262 // resolutions from "extrapSegment"
1263 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1264 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
d0bfce8d 1265 // same things for corrected hit
1266 // better to use copy constructor, after checking that it works properly !!!!
1267 extrapCorrHit->
1268 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
1269 extrapCorrHit->
1270 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
1271 extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
1272 extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
a9e2aefa 1273 // Loop over hits in the chamber
956019b6 1274 ch = 2 * station + chInStation;
a9e2aefa 1275 for (iHit = fIndexOfFirstHitForRecPerChamber[ch];
1276 iHit < fIndexOfFirstHitForRecPerChamber[ch] +
1277 fNHitsForRecPerChamber[ch];
1278 iHit++) {
1279 hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
d0bfce8d 1280 // correction of corrected hit (fBendingCoor and fNonBendingCoor)
1281 // according to real Z value of "hit" and slopes of right "trackParam"
1282 extrapCorrHit->
1283 SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor() +
1284 (&(trackParam[chInStation]))->GetBendingSlope() *
1285 (hit->GetZ() -
1286 (&(trackParam[chInStation]))->GetZ()));
1287 extrapCorrHit->
1288 SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor() +
1289 (&(trackParam[chInStation]))->GetNonBendingSlope() *
1290 (hit->GetZ() -
1291 (&(trackParam[chInStation]))->GetZ()));
a9e2aefa 1292 // condition for hit not already in segment ????
1293 chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance);
1294 if (chi2 < bestChi2) {
1295 // update best Chi2 and HitForRec if better found
1296 bestHit = hit;
1297 bestChi2 = chi2;
d82671a0 1298 chBestHit = chInStation;
a9e2aefa 1299 }
1300 }
1301 }
1302 if (bestHit) {
1303 // best hit found: add it to track candidate
1304 track->AddHitForRec(bestHit);
956019b6 1305 // set track parameters at this TrackHit
a9e2aefa 1306 track->SetTrackParamAtHit(track->GetNTrackHits() - 1,
1307 &(trackParam[chBestHit]));
1308 if (fPrintLevel >= 10) {
1309 cout << "FollowTracks: track candidate(0..): " << trackIndex
1310 << " Added hit in station(0..): " << station << endl;
1311 track->RecursiveDump();
1312 }
1313 }
1314 else {
8429a5e4 1315 // Remove current track candidate
1316 // and corresponding TrackHit's, ...
1317 track->Remove();
04b5ea16 1318 delete extrapSegment;
d0bfce8d 1319 delete extrapCorrSegment;
1320 delete extrapHit;
1321 delete extrapCorrHit;
a9e2aefa 1322 break; // stop the search for this candidate:
1323 // exit from the loop over station
1324 }
d0bfce8d 1325 delete extrapHit;
1326 delete extrapCorrHit;
a9e2aefa 1327 }
04b5ea16 1328 delete extrapSegment;
d0bfce8d 1329 delete extrapCorrSegment;
a9e2aefa 1330 // Sort track hits according to increasing Z
1331 track->GetTrackHitsPtr()->Sort();
1332 // Update track parameters at first track hit (smallest Z)
1333 trackParam1 = ((AliMUONTrackHit*)
1334 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
d0bfce8d 1335 bendingMomentum = 0.;
1336 if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.)
1337 bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum()));
1338 // Track removed if bendingMomentum not in window [min, max]
1339 if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) {
1340 track->Remove();
1341 break; // stop the search for this candidate:
1342 // exit from the loop over station
1343 }
956019b6 1344 // Track fit
04b5ea16 1345 // with multiple Coulomb scattering if all stations
1346 if (station == 0) track->SetFitMCS(1);
956019b6 1347 // without multiple Coulomb scattering if not all stations
04b5ea16 1348 else track->SetFitMCS(0);
956019b6 1349 track->SetFitNParam(5); // with 5 parameters (momentum and position)
1350 track->SetFitStart(1); // from parameters at first hit
1351 track->Fit();
d0bfce8d 1352 Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5);
1353 if (numberOfDegFree > 0) {
1354 chi2Norm = track->GetFitFMin() / numberOfDegFree;
1355 } else {
1356 chi2Norm = 1.e10;
1357 }
1358 // Track removed if normalized chi2 too high
1359 if (chi2Norm > fMaxChi2) {
1360 track->Remove();
1361 break; // stop the search for this candidate:
1362 // exit from the loop over station
1363 }
a9e2aefa 1364 if (fPrintLevel >= 10) {
1365 cout << "FollowTracks: track candidate(0..): " << trackIndex
1366 << " after fit from station(0..): " << station << " to 4" << endl;
1367 track->RecursiveDump();
1368 }
04b5ea16 1369 // Track extrapolation to the vertex through the absorber (Branson)
956019b6 1370 // after going through the first station
04b5ea16 1371 if (station == 0) {
1372 trackParamVertex = *trackParam1;
1373 (&trackParamVertex)->ExtrapToVertex();
1374 track->SetTrackParamAtVertex(&trackParamVertex);
6ae236ee 1375 if (fPrintLevel >= 1) {
1376 cout << "FollowTracks: track candidate(0..): " << trackIndex
1377 << " after extrapolation to vertex" << endl;
1378 track->RecursiveDump();
1379 }
04b5ea16 1380 }
a9e2aefa 1381 } // for (station = 2;...
04b5ea16 1382 // go really to next track
1383 track = nextTrack;
1384 } // while (track)
1385 // Compression of track array (necessary after Remove ????)
1386 fRecTracksPtr->Compress();
1387 return;
1388}
1389
1390 //__________________________________________________________________________
8429a5e4 1391void AliMUONEventReconstructor::RemoveDoubleTracks(void)
1392{
1393 // To remove double tracks.
1394 // Tracks are considered identical
1395 // if they have at least half of their hits in common.
1396 // Among two identical tracks, one keeps the track with the larger number of hits
1397 // or, if these numbers are equal, the track with the minimum Chi2.
1398 AliMUONTrack *track1, *track2, *trackToRemove;
1399 Bool_t identicalTracks;
1400 Int_t hitsInCommon, nHits1, nHits2;
1401 identicalTracks = kTRUE;
1402 while (identicalTracks) {
1403 identicalTracks = kFALSE;
1404 // Loop over first track of the pair
1405 track1 = (AliMUONTrack*) fRecTracksPtr->First();
1406 while (track1 && (!identicalTracks)) {
1407 nHits1 = track1->GetNTrackHits();
1408 // Loop over second track of the pair
1409 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1410 while (track2 && (!identicalTracks)) {
1411 nHits2 = track2->GetNTrackHits();
1412 // number of hits in common between two tracks
1413 hitsInCommon = track1->HitsInCommon(track2);
1414 // check for identical tracks
1415 if ((4 * hitsInCommon) >= (nHits1 + nHits2)) {
1416 identicalTracks = kTRUE;
1417 // decide which track to remove
1418 if (nHits1 > nHits2) trackToRemove = track2;
1419 else if (nHits1 < nHits2) trackToRemove = track1;
1420 else if ((track1->GetFitFMin()) < (track2->GetFitFMin()))
1421 trackToRemove = track2;
1422 else trackToRemove = track1;
1423 // remove it
1424 trackToRemove->Remove();
1425 }
1426 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
1427 } // track2
1428 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
1429 } // track1
1430 }
1431 return;
1432}
1433
1434 //__________________________________________________________________________
04b5ea16 1435void AliMUONEventReconstructor::EventDump(void)
1436{
1437 // Dump reconstructed event (track parameters at vertex and at first hit),
1438 // and the particle parameters
1439
1440 AliMUONTrack *track;
1441 AliMUONTrackParam *trackParam, *trackParam1;
04b5ea16 1442 TParticle *p;
1443 Double_t bendingSlope, nonBendingSlope, pYZ;
1444 Double_t pX, pY, pZ, x, y, z, c;
1445 Int_t np, trackIndex, nTrackHits;
1446
1447 if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl;
1448 if (fPrintLevel >= 1) {
1449 cout << " Number of Reconstructed tracks :" << fNRecTracks << endl;
1450 }
1451 fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole
1452 // Loop over reconstructed tracks
1453 for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) {
1454 if (fPrintLevel >= 1)
1455 cout << " track number: " << trackIndex << endl;
1456 // function for each track for modularity ????
1457 track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]);
1458 nTrackHits = track->GetNTrackHits();
1459 if (fPrintLevel >= 1)
1460 cout << " number of track hits: " << nTrackHits << endl;
1461 // track parameters at Vertex
1462 trackParam = track->GetTrackParamAtVertex();
1463 x = trackParam->GetNonBendingCoor();
1464 y = trackParam->GetBendingCoor();
1465 z = trackParam->GetZ();
1466 bendingSlope = trackParam->GetBendingSlope();
1467 nonBendingSlope = trackParam->GetNonBendingSlope();
1468 pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
1469 pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope);
1470 pX = pZ * nonBendingSlope;
1471 pY = pZ * bendingSlope;
1472 c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum());
1473 if (fPrintLevel >= 1)
1474 printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1475 z, x, y, pX, pY, pZ, c);
1476
1477 // track parameters at first hit
1478 trackParam1 = ((AliMUONTrackHit*)
1479 (track->GetTrackHitsPtr()->First()))->GetTrackParam();
1480 x = trackParam1->GetNonBendingCoor();
1481 y = trackParam1->GetBendingCoor();
1482 z = trackParam1->GetZ();
1483 bendingSlope = trackParam1->GetBendingSlope();
1484 nonBendingSlope = trackParam1->GetNonBendingSlope();
1485 pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum());
1486 pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope);
1487 pX = pZ * nonBendingSlope;
1488 pY = pZ * bendingSlope;
1489 c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum());
1490 if (fPrintLevel >= 1)
1491 printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n",
1492 z, x, y, pX, pY, pZ, c);
1493 }
1494 // informations about generated particles
2ab0c725 1495 np = gAlice->GetNtrack();
04b5ea16 1496 printf(" **** number of generated particles: %d \n", np);
1497
1498 for (Int_t iPart = 0; iPart < np; iPart++) {
2ab0c725 1499 p = gAlice->Particle(iPart);
04b5ea16 1500 printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n",
1501 iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode());
1502 }
a9e2aefa 1503 return;
1504}
1505
c7ba256d 1506void AliMUONEventReconstructor::FillEvent()
1507{
1508// Create a new AliMUONRecoEvent, fill its track list, then add it as a
1509// leaf in the Event branch of TreeRecoEvent tree
1510 cout << "Enter FillEvent() ...\n";
1511
1512 if (!fRecoEvent) {
1513 fRecoEvent = new AliMUONRecoEvent();
1514 } else {
1515 fRecoEvent->Clear();
1516 }
1517 //save current directory
1518 TDirectory *current = gDirectory;
1519 if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE");
1520 if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events");
1521 if (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) {
1522 if (fPrintLevel > 1) fRecoEvent->EventInfo();
1523 TBranch *branch = fEventTree->GetBranch("Event");
d0f40f23 1524 if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000);
c7ba256d 1525 branch->SetAutoDelete();
1526 fTreeFile->cd();
1527 fEventTree->Fill();
1528 fTreeFile->Write();
1529 }
1530 // restore directory
1531 current->cd();
1532}