* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.5 2000/06/30 10:15:48 gosset
-Changes to EventReconstructor...:
-precision fit with multiple Coulomb scattering;
-extrapolation to vertex with Branson correction in absorber (JPC)
+/* $Id$ */
-Revision 1.4 2000/06/27 14:11:36 gosset
-Corrections against violations of coding conventions
-
-Revision 1.3 2000/06/16 07:27:08 gosset
-To remove problem in running RuleChecker, like in MUON-dev
-
-Revision 1.1.2.5 2000/06/16 07:00:26 gosset
-To remove problem in running RuleChecker
-
-Revision 1.1.2.4 2000/06/12 08:00:07 morsch
-Dummy streamer to solve CINT compilation problem (to be investigated !)
-
-Revision 1.1.2.3 2000/06/09 20:59:57 morsch
-Make includes consistent with new file structure.
-
-Revision 1.1.2.2 2000/06/09 12:58:05 gosset
-Removed comment beginnings in Log sections of .cxx files
-Suppressed most violations of coding rules
-
-Revision 1.1.2.1 2000/06/07 14:44:53 gosset
-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 <Riostream.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
+#include "AliConfig.h"
+#include "AliRunLoader.h"
+#include "AliLoader.h"
+#include "AliMUONTrackK.h" //AZ
+#include <TMatrixD.h> //AZ
//************* 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;
{
// Constructor for class AliMUONEventReconstructor
SetReconstructionParametersToDefaults();
+ fTrackMethod = 1; //AZ - tracking method (1-default, 2-Kalman)
// Memory allocation for the TClonesArray of hits for reconstruction
// Is 10000 the right size ????
fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000);
// 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 (const AliMUONEventReconstructor& Reconstructor)
+AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& Reconstructor):TObject(Reconstructor)
{
// Dummy copy constructor
}
-AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& Reconstructor)
+AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& /*Reconstructor*/)
{
// Dummy assignment operator
return *this;
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)
{
// To make the list of hits to be reconstructed,
// either from the GEANT hits or from the raw clusters
// according to the parameter set for the reconstructor
+ TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly
+
+ AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname);
+ if (rl == 0x0)
+ {
+ Error("MakeEventToBeReconstructed",
+ "Can not find Run Loader in Event Folder named %s.",
+ evfoldname.Data());
+ return;
+ }
+ AliLoader* gime = rl->GetLoader("MUONLoader");
+ if (gime == 0x0)
+ {
+ Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader.");
+ return;
+ }
+
if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl;
ResetHitsForRec();
if (fRecGeantHits == 1) {
// Reconstruction from GEANT hits
// Back to the signal file
- ((gAlice->TreeK())->GetCurrentFile())->cd();
- // Signal hits
- // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
- // Security on MUON ????
- AddHitsForRecFromGEANT(gAlice->TreeH());
+ TTree* treeH = gime->TreeH();
+ if (treeH == 0x0)
+ {
+ Int_t retval = gime->LoadHits();
+ if ( retval)
+ {
+ Error("MakeEventToBeReconstructed","Error occured while loading hits.");
+ return;
+ }
+ treeH = gime->TreeH();
+ if (treeH == 0x0)
+ {
+ Error("MakeEventToBeReconstructed","Can not get TreeH");
+ return;
+ }
+ }
+
+ AddHitsForRecFromGEANT(treeH);
+
// Background hits
AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits);
// Sort HitsForRec in increasing order with respect to chamber number
// Security on MUON ????
// TreeR assumed to be be "prepared" in calling function
// by "MUON->GetTreeR(nev)" ????
- TTree *treeR = gAlice->TreeR();
+ TTree *treeR = gime->TreeR();
AddHitsForRecFromRawClusters(treeR);
// No sorting: it is done automatically in the previous function
}
{
// To add to the list of hits for reconstruction
// the GEANT signal hits from a hit tree TH.
+ Int_t hitBits, chamBits; //AZ
if (fPrintLevel >= 2)
cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl;
if (TH == NULL) return;
Int_t ntracks = (Int_t) TH->GetEntries();
if (fPrintLevel >= 2)
cout << "ntracks: " << ntracks << endl;
+ fMuons = 0; //AZ
for (Int_t track = 0; track < ntracks; track++) {
gAlice->ResetHits();
TH->GetEvent(track);
// Loop over hits
Int_t hit = 0;
+ hitBits = 0; // AZ
+ chamBits = 0; // AZ
+ Int_t itrack = track; //AZ
for (AliMUONHit* mHit = (AliMUONHit*) pMUON->FirstHit(-1);
mHit;
mHit = (AliMUONHit*) pMUON->NextHit(), hit++) {
- NewHitForRecFromGEANT(mHit,track, hit, 1);
+ Int_t ipart = TMath::Abs ((Int_t) mHit->Particle()); //AZ
+ //itrack = mHit->Track(); //AZ
+ //AZNewHitForRecFromGEANT(mHit,track, hit, 1);
+ if (NewHitForRecFromGEANT(mHit,track, hit, 1) && ipart == 13
+ //if (NewHitForRecFromGEANT(mHit,itrack-1, hit, 1) && ipart == 13
+ && itrack <= 2) chamBits |= BIT(mHit->Chamber()-1); //AZ - set bit
} // end of hit loop
+ if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 &&
+ chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3))
+ fMuons += 1; //AZ
+ //if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 &&
+ // chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3) &&
+ // ((chamBits&3)==3 || (chamBits>>2&3)==3)) fMuons += 1;
} // end of track loop
return;
}
// 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 ????
+
+ TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly
+ AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname);
+ if (rl == 0x0)
+ {
+ Error("MakeEventToBeReconstructed",
+ "Can not find Run Loader in Event Folder named %s.",
+ evfoldname.Data());
+ return;
+ }
+ AliLoader* gime = rl->GetLoader("MUONLoader");
+ if (gime == 0x0)
+ {
+ Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader.");
+ return;
+ }
+ // Loading AliRun master
+ rl->LoadgAlice();
+ gAlice = rl->GetAliRun();
+
+ // Loading MUON subsystem
+ AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON");
+
+ nTRentries = Int_t(TR->GetEntries());
+ if (nTRentries != 1) {
+ cout << "Error in AliMUONEventReconstructor::AddHitsForRecFromRawClusters"
+ << endl;
+ cout << "nTRentries = " << nTRentries << " not equal to 1" << endl;
+ exit(0);
+ }
+ gime->TreeR()->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
// index of first HitForRec 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 ????
+ rawclusters = pMUON->GetMUONData()->RawClusters(ch);
+// 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) with sign opposite to GEANT sign
- // 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;
hitForRec->Dump();}
} // end of cluster loop
} // end of chamber loop
+ SortHitsForRecWithIncreasingChamber(); //AZ
return;
}
if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl;
ResetSegments();
// Loop over stations
- for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
+ Int_t nb = (fTrackMethod == 2) ? 3 : 0; //AZ
+ //AZ for (Int_t st = 0; st < kMaxMuonTrackingStations; st++)
+ for (Int_t st = nb; st < kMaxMuonTrackingStations; st++) //AZ
MakeSegmentsPerStation(st);
if (fPrintLevel >= 10) {
cout << "end of MakeSegments" << 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
(hit1Ptr->GetZ() - hit2Ptr->GetZ());
// absolute value of impact parameter
impactParam =
- TMath::Abs(hit1Ptr->GetBendingCoor() - hit2Ptr->GetZ() * bendingSlope);
+ TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope);
}
// check for distances not too large,
// and impact parameter not too big if stations downstream of the dipole.
// 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();
- // 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();
+ ResetTrackHits();
+ if (fTrackMethod == 2) { //AZ - Kalman filter
+ MakeTrackCandidatesK();
+ // Follow tracks in stations(1..) 3, 2 and 1
+ FollowTracksK();
+ // Remove double tracks
+ RemoveDoubleTracksK();
+ // Propagate tracks to the vertex thru absorber
+ GoToVertex();
+ } else { //AZ
+ // 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;
}
// because candidates with 2 segments have to looked for only once.
if (begStation == 4)
nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment);
- // Look for track candidates with one segments and one point,
+ // Look for track candidates with one segment and one point,
// "begSegment" and all compatible HitForRec's in other station.
// Only if "begSegment" does not belong already to a track candidate.
// Is that a too strong condition ????
{
// 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;
nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track
if (fPrintLevel >= 2)
cout << "FollowTracks: track candidate(0..): " << trackIndex << endl;
- // Fit track candidate from vertex at X = Y = 0
- track->SetFitMCS(0); // fit without Multiple Scattering
- track->Fit(track->GetTrackParamAtVertex(), 3);
+ // Fit track candidate
+ track->SetFitMCS(0); // without multiple Coulomb scattering
+ track->SetFitNParam(3); // with 3 parameters (X = Y = 0)
+ track->SetFitStart(0); // from parameters at vertex
+ track->Fit();
if (fPrintLevel >= 10) {
cout << "FollowTracks: track candidate(0..): " << trackIndex
- << " after fit in stations(1..) 4 and 5" << endl;
+ << " after fit in stations(0..) 3 and 4" << endl;
track->RecursiveDump();
}
// Loop over stations(1..) 3, 2 and 1
// 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 + ch;
+ ch = 2 * station + chInStation;
for (iHit = fIndexOfFirstHitForRecPerChamber[ch];
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) {
if (bestHit) {
// best hit found: add it to track candidate
track->AddHitForRec(bestHit);
- // set track parameters at these two TrackHit's
+ // set track parameters at this TrackHit
track->SetTrackParamAtHit(track->GetNTrackHits() - 1,
&(trackParam[chBestHit]));
if (fPrintLevel >= 10) {
}
}
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();
- // Track fit from first track hit varying X and Y,
+ 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);
+ // without multiple Coulomb scattering if not all stations
else track->SetFitMCS(0);
- track->Fit(trackParam1, 5);
+ 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;
track->RecursiveDump();
}
// Track extrapolation to the vertex through the absorber (Branson)
+ // after going through the first station
if (station == 0) {
trackParamVertex = *trackParam1;
(&trackParamVertex)->ExtrapToVertex();
track->SetTrackParamAtVertex(&trackParamVertex);
- }
- if (fPrintLevel >= 1) {
- cout << "FollowTracks: track candidate(0..): " << trackIndex
- << " after extrapolation to vertex" << endl;
- track->RecursiveDump();
+ if (fPrintLevel >= 1) {
+ cout << "FollowTracks: track candidate(0..): " << trackIndex
+ << " after extrapolation to vertex" << endl;
+ track->RecursiveDump();
+ }
}
} // for (station = 2;...
// go really to next track
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;
Int_t np, trackIndex, nTrackHits;
fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole
// Loop over reconstructed tracks
for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) {
+ if (fTrackMethod != 1) continue; //AZ - skip the rest for now
if (fPrintLevel >= 1)
cout << " track number: " << trackIndex << endl;
// function for each track for modularity ????
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);
- 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());
+// for (Int_t iPart = 0; iPart < np; 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::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");
+ //AZif (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) {
+ if (fRecoEvent->MakeDumpTracks(fMuons, fRecTracksPtr, this)) { //AZ
+ 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();
+}
+
+//__________________________________________________________________________
+void AliMUONEventReconstructor::MakeTrackCandidatesK(void)
+{
+ // To make initial tracks for Kalman filter from the list of segments
+ Int_t istat, iseg;
+ AliMUONSegment *segment;
+ AliMUONTrackK *trackK;
+
+ if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesK" << endl;
+ // Reset the TClonesArray of reconstructed tracks
+ 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;
+
+ AliMUONTrackK a(this, fHitsForRecPtr); // bad idea ???
+ // Loop over stations(1...) 5 and 4
+ for (istat=4; istat>=3; istat--) {
+ // Loop over segments in the station
+ for (iseg=0; iseg<fNSegments[istat]; iseg++) {
+ // Transform segments to tracks and evaluate covariance matrix
+ segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]);
+ trackK = new ((*fRecTracksPtr)[fNRecTracks]) AliMUONTrackK(segment);
+ fNRecTracks++;
+ } // for (iseg=0;...)
+ } // for (istat=4;...)
+ return;
+}
+
+//__________________________________________________________________________
+void AliMUONEventReconstructor::FollowTracksK(void)
+{
+ // Follow tracks using Kalman filter
+ Bool_t Ok;
+ Int_t icand, ichamBeg, ichamEnd, chamBits;
+ Double_t zDipole1, zDipole2;
+ AliMUONTrackK *trackK;
+ AliMUONHitForRec *hit;
+ AliMUONRawCluster *clus;
+ TClonesArray *rawclusters;
+ AliMUON *pMUON;
+ clus = 0; rawclusters = 0;
+
+ zDipole1 = GetSimpleBPosition() - GetSimpleBLength()/2;
+ zDipole2 = zDipole1 + GetSimpleBLength();
+
+ // Print hits
+ pMUON = (AliMUON*) gAlice->GetModule("MUON");
+ for (Int_t i1=0; i1<fNHitsForRec; i1++) {
+ hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]);
+ //if (hit->GetTHTrack() > 1 || hit->GetGeantSignal() == 0) continue;
+ /*
+ cout << " Hit #" << hit->GetChamberNumber() << " ";
+ cout << hit->GetBendingCoor() << " ";
+ cout << hit->GetNonBendingCoor() << " ";
+ cout << hit->GetZ() << " ";
+ cout << hit->GetGeantSignal() << " ";
+ cout << hit->GetTHTrack() << endl;
+ */
+ /*
+ printf(" Hit # %d %10.4f %10.4f %10.4f",
+ hit->GetChamberNumber(), hit->GetBendingCoor(),
+ hit->GetNonBendingCoor(), hit->GetZ());
+ if (fRecGeantHits) {
+ // from GEANT hits
+ printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack());
+ } else {
+ // from raw clusters
+ rawclusters = pMUON->RawClustAddress(hit->GetChamberNumber());
+ clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->
+ GetHitNumber());
+ printf("%3d", clus->fTracks[1]-1);
+ if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1);
+ else printf("\n");
+ }
+ */
+ }
+
+ icand = -1;
+ Int_t nSeeds = fNRecTracks; // starting number of seeds
+ // Loop over track candidates
+ while (icand < fNRecTracks-1) {
+ icand ++;
+ trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]);
+
+ // Discard candidate which will produce the double track
+ if (icand > 0) {
+ Ok = CheckCandidateK(icand,nSeeds);
+ if (!Ok) {
+ //trackK->SetRecover(-1); // mark candidate to be removed
+ //continue;
+ }
+ }
+
+ Ok = kTRUE;
+ if (trackK->GetRecover() == 0) hit = (AliMUONHitForRec*)
+ trackK->GetHitOnTrack()->Last(); // last hit
+ else hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[1]; // 2'nd hit
+ ichamBeg = hit->GetChamberNumber();
+ ichamEnd = 0;
+ // Check propagation direction
+ if (trackK->GetTrackDir() > 0) {
+ ichamEnd = 9; // forward propagation
+ Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2);
+ if (Ok) {
+ ichamBeg = ichamEnd;
+ ichamEnd = 6; // backward propagation
+ // Change weight matrix and zero fChi2 for backpropagation
+ trackK->StartBack();
+ Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2);
+ ichamBeg = ichamEnd;
+ ichamEnd = 0;
+ }
+ } else {
+ if (trackK->GetBPFlag()) {
+ // backpropagation
+ ichamEnd = 6; // backward propagation
+ // Change weight matrix and zero fChi2 for backpropagation
+ trackK->StartBack();
+ Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2);
+ ichamBeg = ichamEnd;
+ ichamEnd = 0;
+ }
+ }
+
+ if (Ok) {
+ trackK->SetTrackDir(-1);
+ trackK->SetBPFlag(kFALSE);
+ Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2);
+ }
+ if (Ok) trackK->SetTrackQuality(0); // compute "track quality"
+ else trackK->SetRecover(-1); // mark candidate to be removed
+
+ // Majority 3 of 4 in first 2 stations
+ chamBits = 0;
+ for (Int_t i=0; i<trackK->GetNTrackHits(); i++) {
+ hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[i];
+ chamBits |= BIT(hit->GetChamberNumber()-1);
+ }
+ //if (!((chamBits&3)==3 || (chamBits>>2&3)==3)) trackK->SetRecover(-1);
+ //mark candidate to be removed
+ } // while
+
+ for (Int_t i=0; i<fNRecTracks; i++) {
+ trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]);
+ if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i);
}
+
+ // Compress TClonesArray
+ fRecTracksPtr->Compress();
+ fNRecTracks = fRecTracksPtr->GetEntriesFast();
return;
}
-void AliMUONEventReconstructor::Streamer(TBuffer &R__b)
+//__________________________________________________________________________
+Bool_t AliMUONEventReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds)
{
- ;
+ // Discards track candidate if it will produce the double track (having
+ // the same seed segment hits as hits of a good track found before)
+ AliMUONTrackK *track1, *track2;
+ AliMUONHitForRec *hit1, *hit2, *hit;
+
+ track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]);
+ hit1 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[0]; // 1'st hit
+ hit2 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[1]; // 2'nd hit
+
+ for (Int_t i=0; i<icand; i++) {
+ track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]);
+ //if (track2->GetRecover() < 0) continue;
+ if (track2->GetRecover() < 0 && icand >= nSeeds) continue;
+
+ if (track1->GetStartSegment() == track2->GetStartSegment()) {
+ return kFALSE;
+ } else {
+ Int_t nSame = 0;
+ for (Int_t j=0; j<track2->GetNTrackHits(); j++) {
+ hit = (AliMUONHitForRec*) (*track2->GetHitOnTrack())[j];
+ if (hit == hit1 || hit == hit2) {
+ nSame++;
+ if (nSame == 2) return kFALSE;
+ }
+ } // for (Int_t j=0;
+ }
+ } // for (Int_t i=0;
+ return kTRUE;
+}
+
+//__________________________________________________________________________
+void AliMUONEventReconstructor::RemoveDoubleTracksK(void)
+{
+ // Removes double tracks (sharing more than half of their hits). Keeps
+ // the track with higher quality
+ AliMUONTrackK *track1, *track2, *trackToKill;
+
+ // Sort tracks according to their quality
+ fRecTracksPtr->Sort();
+
+ // Loop over first track of the pair
+ track1 = (AliMUONTrackK*) fRecTracksPtr->First();
+ while (track1) {
+ // Loop over second track of the pair
+ track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1);
+ while (track2) {
+ // Check whether or not to keep track2
+ if (!track2->KeepTrack(track1)) {
+ cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) <<
+ " " << track2->GetTrackQuality() << endl;
+ trackToKill = track2;
+ track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2);
+ trackToKill->Kill();
+ fRecTracksPtr->Compress();
+ } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2);
+ } // track2
+ track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1);
+ } // track1
+
+ fNRecTracks = fRecTracksPtr->GetEntriesFast();
+ cout << " Number of Kalman tracks: " << fNRecTracks << endl;
+}
+
+//__________________________________________________________________________
+void AliMUONEventReconstructor::GoToVertex(void)
+{
+ // Propagates track to the vertex thru absorber
+ // (using Branson correction for now)
+
+ Double_t zVertex;
+ zVertex = 0;
+ for (Int_t i=0; i<fNRecTracks; i++) {
+ //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson();
+ //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber
+ ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2
+ ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(); // with absorber
+ }
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff