/*
$Log$
+Revision 1.27 2001/07/27 13:03:12 hristov
+Default Branch split level set to 99
+
+Revision 1.26 2001/05/03 08:11:31 hristov
+stdlib.h included to define exit()
+
+Revision 1.25 2001/04/25 14:50:42 gosset
+Corrections to violations of coding conventions
+
+Revision 1.24 2001/03/30 09:37:58 gosset
+Initialisations of pointers... for GEANT background events in the constructor
+
+Revision 1.23 2001/01/26 21:44:45 morsch
+Use access functions to AliMUONDigit, ... member data.
+
+Revision 1.22 2001/01/26 20:00:53 hristov
+Major upgrade of AliRoot code
+Revision 1.20 2001/01/08 11:01:02 gosset
+Modifications used for addendum to Dimuon TDR (JP Cussonneau):
+*. MaxBendingMomentum to make both a segment and a track (default 500)
+*. MaxChi2 per degree of freedom to make a track (default 100)
+*. MinBendingMomentum used also to make a track
+ and not only a segment (default 3)
+*. wider roads for track search in stations 1 to 3
+*. extrapolation to actual Z instead of Z(chamber) in FollowTracks
+*. in track fit:
+ - limits on parameters X and Y (+/-500)
+ - covariance matrices in double precision
+ - normalization of covariance matrices before inversion
+ - suppression of Minuit printouts
+*. correction against memory leak (delete extrapHit) in FollowTracks
+*. RMax to 10 degrees with Z(chamber) instead of fixed values;
+ RMin and Rmax cuts suppressed in NewHitForRecFromGEANT,
+ because useless with realistic geometry
+
+Revision 1.19 2000/11/20 11:24:10 gosset
+New package for reconstructed tracks (A. Gheata):
+* tree output in the file "tree_reco.root"
+* display events and make histograms from this file
+
+Revision 1.18 2000/10/26 12:47:03 gosset
+Real distance between chambers of each station taken into account
+for the reconstruction parameters "fSegmentMaxDistBending[5]"
+
+Revision 1.17 2000/10/24 09:26:20 gosset
+Comments updated
+
+Revision 1.16 2000/10/24 09:22:35 gosset
+Method AddHitsForRecFromRawClusters: real Z of raw cluster and not Z of chamber
+
+Revision 1.15 2000/10/12 15:17:30 gosset
+Sign of fSimpleBValue corrected: sign ox Bx and not Bz (thanks to Galina)
+
+Revision 1.14 2000/10/04 18:21:26 morsch
+Include stdlib.h
+
+Revision 1.13 2000/10/02 21:28:09 fca
+Removal of useless dependecies via forward declarations
+
+Revision 1.12 2000/10/02 16:58:29 egangler
+Cleaning of the code :
+-> coding conventions
+-> void Streamers
+-> some useless includes removed or replaced by "class" statement
+
+Revision 1.11 2000/09/22 09:16:33 hristov
+Casting needed on DEC
+
+Revision 1.10 2000/09/19 09:49:50 gosset
+AliMUONEventReconstructor package
+* track extrapolation independent from reco_muon.F, use of AliMagF...
+* possibility to use new magnetic field (automatic from generated root file)
+
+Revision 1.9 2000/07/20 12:45:27 gosset
+New "EventReconstructor..." structure,
+ hopefully more adapted to tree/streamer.
+"AliMUONEventReconstructor::RemoveDoubleTracks"
+ to keep only one track among similar ones.
+
+Revision 1.8 2000/07/18 16:04:06 gosset
+AliMUONEventReconstructor package:
+* a few minor modifications and more comments
+* a few corrections
+ * right sign for Z of raw clusters
+ * right loop over chambers inside station
+ * symmetrized covariance matrix for measurements (TrackChi2MCS)
+ * right sign of charge in extrapolation (ExtrapToZ)
+ * right zEndAbsorber for Branson correction below 3 degrees
+* use of TVirtualFitter instead of TMinuit for AliMUONTrack::Fit
+* no parameter for AliMUONTrack::Fit() but more fit parameters in Track object
+
Revision 1.7 2000/07/03 12:28:06 gosset
Printout at the right place after extrapolation to vertex
Addition of files for track reconstruction in C++
*/
-//__________________________________________________________________________
+////////////////////////////////////
//
// MUON event reconstructor in ALICE
//
// * MakeEventToBeReconstructed to build the array of hits to be reconstructed
// * MakeSegments to build the segments
// * MakeTracks to build the tracks
-//__________________________________________________________________________
+//
+////////////////////////////////////
-#include <iostream.h>
+#include <iostream.h> // for cout
+#include <stdlib.h> // for exit()
-#include <TRandom.h>
-#include <TFile.h>
+#include <TTree.h>
-#include "AliCallf77.h"
-#include "AliMUONEventReconstructor.h"
#include "AliMUON.h"
+#include "AliMUONChamber.h"
+#include "AliMUONEventReconstructor.h"
#include "AliMUONHitForRec.h"
-#include "AliMUONSegment.h"
-#include "AliMUONHit.h"
#include "AliMUONRawCluster.h"
+#include "AliMUONRecoEvent.h"
+#include "AliMUONSegment.h"
#include "AliMUONTrack.h"
-#include "AliMUONChamber.h"
#include "AliMUONTrackHit.h"
-#include "AliRun.h"
-#include "TParticle.h"
-
-#ifndef WIN32
-# define initfield initfield_
-# define reco_gufld reco_gufld_
-#else
-# define initfield INITFIELD
-# define reco_gufld RECO_GUFLD
-#endif
-
-extern "C"
-{
-void type_of_call initfield();
-void type_of_call reco_gufld(Double_t *Coor, Double_t *Field);
-}
+#include "AliMagF.h"
+#include "AliRun.h" // for gAlice
//************* Defaults parameters for reconstruction
static const Double_t kDefaultMinBendingMomentum = 3.0;
+static const Double_t kDefaultMaxBendingMomentum = 500.0;
+static const Double_t kDefaultMaxChi2 = 100.0;
static const Double_t kDefaultMaxSigma2Distance = 16.0;
static const Double_t kDefaultBendingResolution = 0.01;
static const Double_t kDefaultNonBendingResolution = 0.144;
// Is 10 the right size ????
fRecTracksPtr = new TClonesArray("AliMUONTrack", 10);
fNRecTracks = 0; // really needed or GetEntriesFast sufficient ????
+ // Memory allocation for the TClonesArray of hits on reconstructed tracks
+ // Is 100 the right size ????
+ fRecTrackHitsPtr = new TClonesArray("AliMUONTrack", 100);
+ fNRecTrackHits = 0; // really needed or GetEntriesFast sufficient ????
- // Initialize magnetic field
- // using Fortran subroutine INITFIELD in "reco_muon.F".
- // Should rather use AliMagF ???? and remove prototyping ...
- initfield();
- // Impression de quelques valeurs
- Double_t coor[3], field[3];
- coor[0] = 50.0;
- coor[1] = 50.0;
- coor[2] = 950.0;
- reco_gufld(coor, field);
- cout << "coor: " << coor[0] << ", " << coor[1] << ", " << coor[2] << endl;
- cout << "field: " << field[0] << ", " << field[1] << ", " << field[2] << endl;
- coor[2] = -950.0;
- reco_gufld(coor, field);
- cout << "coor: " << coor[0] << ", " << coor[1] << ", " << coor[2] << endl;
- cout << "field: " << field[0] << ", " << field[1] << ", " << field[2] << endl;
- coor[2] = -950.0;
+ // Sign of fSimpleBValue according to sign of Bx value at (50,50,950).
+ Float_t b[3], x[3];
+ x[0] = 50.; x[1] = 50.; x[2] = 950.;
+ gAlice->Field()->Field(x, b);
+ fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]);
+ // See how to get fSimple(BValue, BLength, BPosition)
+ // automatically calculated from the actual magnetic field ????
if (fPrintLevel >= 0) {
- cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump();}
+ cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump();
+ cout << endl << "Magnetic field from root file:" << endl;
+ gAlice->Field()->Dump();
+ cout << endl;
+ }
+
+ // Initializions for GEANT background events
+ fBkgGeantFile = 0;
+ fBkgGeantTK = 0;
+ fBkgGeantParticles = 0;
+ fBkgGeantTH = 0;
+ fBkgGeantHits = 0;
+ fBkgGeantEventNumber = -1;
+
+ // Initialize to 0 pointers to RecoEvent, tree and tree file
+ fRecoEvent = 0;
+ fEventTree = 0;
+ fTreeFile = 0;
+
return;
}
AliMUONEventReconstructor::~AliMUONEventReconstructor(void)
{
// Destructor for class AliMUONEventReconstructor
+ if (fTreeFile) {
+ fTreeFile->Close();
+ delete fTreeFile;
+ }
+// if (fEventTree) delete fEventTree;
+ if (fRecoEvent) delete fRecoEvent;
delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ????
for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
delete fSegmentsPtr[st]; // Correct destruction of everything ????
// Set reconstruction parameters to default values
// Would be much more convenient with a structure (or class) ????
fMinBendingMomentum = kDefaultMinBendingMomentum;
+ fMaxBendingMomentum = kDefaultMaxBendingMomentum;
+ fMaxChi2 = kDefaultMaxChi2;
fMaxSigma2Distance = kDefaultMaxSigma2Distance;
AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON");
if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
2.0 * TMath::Pi() / 180.0;
else fRMin[ch] = 30.0;
+ // maximum radius at 10 degrees and Z of chamber
+ fRMax[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) *
+ 10.0 * TMath::Pi() / 180.0;
}
- // maximum radius
- // like in TRACKF_STAT (10 degrees ????)
- fRMax[0] = fRMax[1] = 91.5;
- fRMax[2] = fRMax[3] = 122.5;
- fRMax[4] = fRMax[5] = 158.3;
- fRMax[6] = fRMax[7] = 260.0;
- fRMax[8] = fRMax[9] = 260.0;
// ******** Parameters for making segments
// should be parametrized ????
// SIGCUT*DYMAX(IZ)
for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
fSegmentMaxDistNonBending[st] = 5. * 0.22;
- // Maximum distance in bending plane
- // values from TRACKF_STAT corresponding to (J psi 20cm)
- fSegmentMaxDistBending[0] = 1.5;
- fSegmentMaxDistBending[1] = 1.5;
- fSegmentMaxDistBending[2] = 3.0;
- fSegmentMaxDistBending[3] = 6.0;
- fSegmentMaxDistBending[4] = 6.0;
+ // Maximum distance in bending plane:
+ // values from TRACKF_STAT, corresponding to (J psi 20cm),
+ // scaled to the real distance between chambers in a station
+ fSegmentMaxDistBending[0] = 1.5 *
+ ((&(pMUON->Chamber(1)))->Z() - (&(pMUON->Chamber(0)))->Z()) / 20.0;
+ fSegmentMaxDistBending[1] = 1.5 *
+ ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0;
+ fSegmentMaxDistBending[2] = 3.0 *
+ ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0;
+ fSegmentMaxDistBending[3] = 6.0 *
+ ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0;
+ fSegmentMaxDistBending[4] = 6.0 *
+ ((&(pMUON->Chamber(9)))->Z() - (&(pMUON->Chamber(8)))->Z()) / 20.0;
fBendingResolution = kDefaultBendingResolution;
fNonBendingResolution = kDefaultNonBendingResolution;
}
//__________________________________________________________________________
-Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum)
+Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const
{
// Returns impact parameter at vertex in bending plane (cm),
// from the signed bending momentum "BendingMomentum" in bending plane (GeV/c),
// using simple values for dipole magnetic field.
- // The sign is the sign of the charge.
+ // The sign of "BendingMomentum" is the sign of the charge.
return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
BendingMomentum);
}
//__________________________________________________________________________
-Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam)
+Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const
{
// Returns signed bending momentum in bending plane (GeV/c),
+ // the sign being the sign of the charge for particles moving forward in Z,
// from the impact parameter "ImpactParam" at vertex in bending plane (cm),
// using simple values for dipole magnetic field.
- // The sign is the sign of the charge.
return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition /
ImpactParam);
}
void AliMUONEventReconstructor::ResetTracks(void)
{
// To reset the TClonesArray of reconstructed tracks
- if (fRecTracksPtr) fRecTracksPtr->Clear();
+ if (fRecTracksPtr) fRecTracksPtr->Delete();
+ // Delete in order that the Track destructors are called,
+ // hence the space for the TClonesArray of pointers to TrackHit's is freed
fNRecTracks = 0;
return;
}
+ //__________________________________________________________________________
+void AliMUONEventReconstructor::ResetTrackHits(void)
+{
+ // To reset the TClonesArray of hits on reconstructed tracks
+ if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear();
+ fNRecTrackHits = 0;
+ return;
+}
+
//__________________________________________________________________________
void AliMUONEventReconstructor::MakeEventToBeReconstructed(void)
{
// like in Fortran TRACKF_STAT.
AliMUONHitForRec* hitForRec;
Double_t bendCoor, nonBendCoor, radius;
- Int_t chamber = Hit->fChamber - 1; // chamber(0...)
+ Int_t chamber = Hit->Chamber() - 1; // chamber(0...)
// only in tracking chambers (fChamber starts at 1)
if (chamber >= kMaxMuonTrackingChambers) return NULL;
// only if hit is efficient (keep track for checking ????)
if (gRandom->Rndm() > fEfficiency) return NULL;
// only if radius between RMin and RMax
- bendCoor = Hit->fY;
- nonBendCoor = Hit->fX;
+ bendCoor = Hit->Y();
+ nonBendCoor = Hit->X();
radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor));
- if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL;
+ // This cut is not needed with a realistic chamber geometry !!!!
+// if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL;
// new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's
hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit);
fNHitsForRec++;
hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution));
hitForRec->SetNonBendingCoor(nonBendCoor
+ gRandom->Gaus(0., fNonBendingResolution));
+// // !!!! without smearing
+// hitForRec->SetBendingCoor(bendCoor);
+// hitForRec->SetNonBendingCoor(nonBendCoor);
// more information into HitForRec
// resolution: angular effect to be added here ????
hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution);
// on the radius between RMin and RMax.
AliMUONHitForRec *hitForRec;
AliMUONRawCluster *clus;
- Int_t iclus, nclus;
+ Int_t iclus, nclus, nTRentries;
TClonesArray *rawclusters;
if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl;
AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
// Security on MUON ????
+ pMUON->ResetRawClusters();
+ nTRentries = Int_t(TR->GetEntries());
+ if (nTRentries != 1) {
+ cout << "Error in AliMUONEventReconstructor::AddHitsForRecFromRawClusters"
+ << endl;
+ cout << "nTRentries = " << nTRentries << " not equal to 1" << endl;
+ exit(0);
+ }
+ TR->GetEvent(0); // only one entry
// Loop over tracking chambers
for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) {
// number of HitsForRec to 0 for the chamber
if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0;
else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec;
rawclusters = pMUON->RawClustAddress(ch);
- pMUON->ResetRawClusters();
- TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ????
+// pMUON->ResetRawClusters();
+// TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ????
nclus = (Int_t) (rawclusters->GetEntries());
// Loop over (cathode correlated) raw clusters
for (iclus = 0; iclus < nclus; iclus++) {
// original raw cluster
hitForRec->SetChamberNumber(ch);
hitForRec->SetHitNumber(iclus);
- // Z coordinate of the chamber (cm)
- // could (should) be more exact from chamber geometry ????
- hitForRec->SetZ((&(pMUON->Chamber(ch)))->Z());
+ // Z coordinate of the raw cluster (cm)
+ hitForRec->SetZ(clus->fZ[0]);
if (fPrintLevel >= 10) {
cout << "chamber (0...): " << ch <<
" raw cluster (0...): " << iclus << endl;
AliMUONSegment *segment;
Bool_t last2st;
Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor,
- impactParam, maxImpactParam;
+ impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings.
AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
if (fPrintLevel >= 1)
cout << "enter MakeSegmentsPerStation (0...) " << Station << endl;
// maximum impact parameter (cm) according to fMinBendingMomentum...
maxImpactParam =
TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum));
+ // minimum impact parameter (cm) according to fMaxBendingMomentum...
+ minImpactParam =
+ TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum));
}
else last2st = kFALSE;
// extrapolation factor from Z of first chamber to Z of second chamber
// Conditions "distBend" and "impactParam" correlated for these stations ????
if ((distBend < fSegmentMaxDistBending[Station]) &&
(distNonBend < fSegmentMaxDistNonBending[Station]) &&
- (!last2st || (impactParam < maxImpactParam))) {
+ (!last2st || (impactParam < maxImpactParam)) &&
+ (!last2st || (impactParam > minImpactParam))) {
// make new segment
segment = new ((*fSegmentsPtr[Station])[segmentIndex])
AliMUONSegment(hit1Ptr, hit2Ptr);
// To make the tracks,
// from the list of segments and points in all stations
if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl;
+ // The order may be important for the following Reset's
ResetTracks();
+ ResetTrackHits();
// Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
MakeTrackCandidates();
// Follow tracks in stations(1..) 3, 2 and 1
FollowTracks();
+ // Remove double tracks
+ RemoveDoubleTracks();
return;
}
{
// Follow tracks in stations(1..) 3, 2 and 1
// too long: should be made more modular !!!!
- AliMUONHitForRec *bestHit, *extrapHit, *hit;
- AliMUONSegment *bestSegment, *extrapSegment, *segment;
+ AliMUONHitForRec *bestHit, *extrapHit, *extrapCorrHit, *hit;
+ AliMUONSegment *bestSegment, *extrapSegment, *extrapCorrSegment, *segment;
AliMUONTrack *track, *nextTrack;
AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex;
- Int_t ch, chInStation, chBestHit, iHit, iSegment, station, trackIndex;
+ // -1 to avoid compilation warnings
+ Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex;
Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor;
+ Double_t bendingMomentum, chi2Norm = 0.;
AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
// local maxSigma2Distance, for easy increase in testing
maxSigma2Distance = fMaxSigma2Distance;
// extrapolation to station
trackParam1->ExtrapToStation(station, trackParam);
extrapSegment = new AliMUONSegment(); // empty segment
+ extrapCorrSegment = new AliMUONSegment(); // empty corrected segment
// multiple scattering factor corresponding to one chamber
// and momentum in bending plane (not total)
mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum();
extrapSegment->UpdateFromStationTrackParam
(trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
trackParam1->GetInverseBendingMomentum());
+ // same thing for corrected segment
+ // better to use copy constructor, after checking that it works properly !!!!
+ extrapCorrSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution);
+ extrapCorrSegment->
+ SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution);
+ extrapCorrSegment->UpdateFromStationTrackParam
+ (trackParam, mcsFactor, dZ1, dZ2, dZ3, station,
+ trackParam1->GetInverseBendingMomentum());
bestChi2 = 5.0;
bestSegment = NULL;
if (fPrintLevel >= 10) {
// multiple scattering ????
// separation in 2 functions: Segment and HitForRec ????
segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]);
- chi2 = segment->NormalizedChi2WithSegment(extrapSegment, maxSigma2Distance);
+ // correction of corrected segment (fBendingCoor and fNonBendingCoor)
+ // according to real Z value of "segment" and slopes of "extrapSegment"
+ extrapCorrSegment->
+ SetBendingCoor(extrapSegment->GetBendingCoor() +
+ extrapSegment->GetBendingSlope() *
+ (segment->GetHitForRec1()->GetZ() -
+ (&(pMUON->Chamber(2 * station)))->Z()));
+ extrapCorrSegment->
+ SetNonBendingCoor(extrapSegment->GetNonBendingCoor() +
+ extrapSegment->GetNonBendingSlope() *
+ (segment->GetHitForRec1()->GetZ() -
+ (&(pMUON->Chamber(2 * station)))->Z()));
+ chi2 = segment->
+ NormalizedChi2WithSegment(extrapCorrSegment, maxSigma2Distance);
if (chi2 < bestChi2) {
// update best Chi2 and Segment if better found
bestSegment = segment;
// should consider all possibilities ????
// multiple scattering ???? do about like for extrapSegment !!!!
extrapHit = new AliMUONHitForRec(); // empty hit
+ extrapCorrHit = new AliMUONHitForRec(); // empty corrected hit
bestChi2 = 3.0;
bestHit = NULL;
if (fPrintLevel >= 10) {
// resolutions from "extrapSegment"
extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
+ // same things for corrected hit
+ // better to use copy constructor, after checking that it works properly !!!!
+ extrapCorrHit->
+ SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor());
+ extrapCorrHit->
+ SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor());
+ extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2());
+ extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2());
// Loop over hits in the chamber
ch = 2 * station + chInStation;
for (iHit = fIndexOfFirstHitForRecPerChamber[ch];
fNHitsForRecPerChamber[ch];
iHit++) {
hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]);
+ // correction of corrected hit (fBendingCoor and fNonBendingCoor)
+ // according to real Z value of "hit" and slopes of right "trackParam"
+ extrapCorrHit->
+ SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor() +
+ (&(trackParam[chInStation]))->GetBendingSlope() *
+ (hit->GetZ() -
+ (&(trackParam[chInStation]))->GetZ()));
+ extrapCorrHit->
+ SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor() +
+ (&(trackParam[chInStation]))->GetNonBendingSlope() *
+ (hit->GetZ() -
+ (&(trackParam[chInStation]))->GetZ()));
// condition for hit not already in segment ????
chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance);
if (chi2 < bestChi2) {
}
}
else {
- // Remove current track candidate and update fNRecTracks
- // To be checked: recursive delete of TrackHit's !!!!
- // For cleaner implementation: call track->Remove()
- // to be coded, with all cleanings,
- // including links between HitForRec's and TrackHit's !!!!
- fRecTracksPtr->Remove(track);
- fNRecTracks--;
+ // Remove current track candidate
+ // and corresponding TrackHit's, ...
+ track->Remove();
delete extrapSegment;
+ delete extrapCorrSegment;
+ delete extrapHit;
+ delete extrapCorrHit;
break; // stop the search for this candidate:
// exit from the loop over station
}
+ delete extrapHit;
+ delete extrapCorrHit;
}
delete extrapSegment;
+ delete extrapCorrSegment;
// Sort track hits according to increasing Z
track->GetTrackHitsPtr()->Sort();
// Update track parameters at first track hit (smallest Z)
trackParam1 = ((AliMUONTrackHit*)
(track->GetTrackHitsPtr()->First()))->GetTrackParam();
+ bendingMomentum = 0.;
+ if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.)
+ bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum()));
+ // Track removed if bendingMomentum not in window [min, max]
+ if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) {
+ track->Remove();
+ break; // stop the search for this candidate:
+ // exit from the loop over station
+ }
// Track fit
// with multiple Coulomb scattering if all stations
if (station == 0) track->SetFitMCS(1);
track->SetFitNParam(5); // with 5 parameters (momentum and position)
track->SetFitStart(1); // from parameters at first hit
track->Fit();
+ Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5);
+ if (numberOfDegFree > 0) {
+ chi2Norm = track->GetFitFMin() / numberOfDegFree;
+ } else {
+ chi2Norm = 1.e10;
+ }
+ // Track removed if normalized chi2 too high
+ if (chi2Norm > fMaxChi2) {
+ track->Remove();
+ break; // stop the search for this candidate:
+ // exit from the loop over station
+ }
if (fPrintLevel >= 10) {
cout << "FollowTracks: track candidate(0..): " << trackIndex
<< " after fit from station(0..): " << station << " to 4" << endl;
return;
}
+ //__________________________________________________________________________
+void AliMUONEventReconstructor::RemoveDoubleTracks(void)
+{
+ // To remove double tracks.
+ // Tracks are considered identical
+ // if they have at least half of their hits in common.
+ // Among two identical tracks, one keeps the track with the larger number of hits
+ // or, if these numbers are equal, the track with the minimum Chi2.
+ AliMUONTrack *track1, *track2, *trackToRemove;
+ Bool_t identicalTracks;
+ Int_t hitsInCommon, nHits1, nHits2;
+ identicalTracks = kTRUE;
+ while (identicalTracks) {
+ identicalTracks = kFALSE;
+ // Loop over first track of the pair
+ track1 = (AliMUONTrack*) fRecTracksPtr->First();
+ while (track1 && (!identicalTracks)) {
+ nHits1 = track1->GetNTrackHits();
+ // Loop over second track of the pair
+ track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
+ while (track2 && (!identicalTracks)) {
+ nHits2 = track2->GetNTrackHits();
+ // number of hits in common between two tracks
+ hitsInCommon = track1->HitsInCommon(track2);
+ // check for identical tracks
+ if ((4 * hitsInCommon) >= (nHits1 + nHits2)) {
+ identicalTracks = kTRUE;
+ // decide which track to remove
+ if (nHits1 > nHits2) trackToRemove = track2;
+ else if (nHits1 < nHits2) trackToRemove = track1;
+ else if ((track1->GetFitFMin()) < (track2->GetFitFMin()))
+ trackToRemove = track2;
+ else trackToRemove = track1;
+ // remove it
+ trackToRemove->Remove();
+ }
+ track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
+ } // track2
+ track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
+ } // track1
+ }
+ return;
+}
+
//__________________________________________________________________________
void AliMUONEventReconstructor::EventDump(void)
{
AliMUONTrack *track;
AliMUONTrackParam *trackParam, *trackParam1;
- TClonesArray *particles; // pointer to the particle list
TParticle *p;
Double_t bendingSlope, nonBendingSlope, pYZ;
Double_t pX, pY, pZ, x, y, z, c;
z, x, y, pX, pY, pZ, c);
}
// informations about generated particles
- particles = gAlice->Particles();
- np = particles->GetEntriesFast();
+ np = gAlice->GetNtrack();
printf(" **** number of generated particles: %d \n", np);
for (Int_t iPart = 0; iPart < np; iPart++) {
- p = (TParticle*) particles->UncheckedAt(iPart);
+ p = gAlice->Particle(iPart);
printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n",
iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode());
}
return;
}
-void AliMUONEventReconstructor::Streamer(TBuffer &R__b)
+void AliMUONEventReconstructor::FillEvent()
{
- ;
+// Create a new AliMUONRecoEvent, fill its track list, then add it as a
+// leaf in the Event branch of TreeRecoEvent tree
+ cout << "Enter FillEvent() ...\n";
+
+ if (!fRecoEvent) {
+ fRecoEvent = new AliMUONRecoEvent();
+ } else {
+ fRecoEvent->Clear();
+ }
+ //save current directory
+ TDirectory *current = gDirectory;
+ if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE");
+ if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events");
+ if (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) {
+ if (fPrintLevel > 1) fRecoEvent->EventInfo();
+ TBranch *branch = fEventTree->GetBranch("Event");
+ if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000);
+ branch->SetAutoDelete();
+ fTreeFile->cd();
+ fEventTree->Fill();
+ fTreeFile->Write();
+ }
+ // restore directory
+ current->cd();
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff