* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.5 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 1.4 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)
-
-Revision 1.3 2000/06/25 13:23:28 hristov
-stdlib.h needed for non-Linux compilation
-
-Revision 1.2 2000/06/15 07:58:48 morsch
-Code from MUON-dev joined
-
-Revision 1.1.2.3 2000/06/12 10:11:34 morsch
-Dummy copy constructor and assignment operator added
-
-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++
-*/
+/* $Id$ */
-//__________________________________________________________________________
+///////////////////////////////////////////////////
//
-// Reconstructed track in ALICE dimuon spectrometer
-//__________________________________________________________________________
-
-#include "AliMUONTrack.h"
+// Reconstructed track
+// in
+// ALICE
+// dimuon
+// spectrometer
+//
+///////////////////////////////////////////////////
-#include <iostream.h>
+#include <stdlib.h> // for exit()
+#include <Riostream.h>
-#include <TClonesArray.h>
-#include <TMath.h>
-#include <TMatrix.h>
-#include <TObjArray.h>
-#include <TVirtualFitter.h>
+#include "AliMUONTrack.h"
-#include "AliMUONEventReconstructor.h"
+#include "AliMUONTrackParam.h"
#include "AliMUONHitForRec.h"
#include "AliMUONSegment.h"
-#include "AliMUONTrackHit.h"
+#include "AliMUONConstants.h"
-#include <stdlib.h>
+#include "AliLog.h"
-// Functions to be minimized with Minuit
-void TrackChi2(Int_t &NParam, Double_t *Gradient, Double_t &Chi2, Double_t *Param, Int_t Flag);
-void TrackChi2MCS(Int_t &NParam, Double_t *Gradient, Double_t &Chi2, Double_t *Param, Int_t Flag);
-
-Double_t MultipleScatteringAngle2(AliMUONTrackHit *TrackHit);
+#include <TMath.h>
+/// \cond CLASSIMP
ClassImp(AliMUONTrack) // Class implementation in ROOT context
+/// \endcond
-TVirtualFitter* AliMUONTrack::fgFitter = NULL;
+//__________________________________________________________________________
+AliMUONTrack::AliMUONTrack()
+ : TObject(),
+ fTrackParamAtVertex(),
+ fTrackParamAtHit(0x0),
+ fHitForRecAtHit(0x0),
+ fNTrackHits(0),
+ fFitFMin(-1.),
+ fMatchTrigger(kFALSE),
+ fChi2MatchTrigger(0.),
+ fTrackID(0)
+{
+ /// Default constructor
+}
//__________________________________________________________________________
-AliMUONTrack::AliMUONTrack(AliMUONSegment* BegSegment, AliMUONSegment* EndSegment, AliMUONEventReconstructor* EventReconstructor)
+AliMUONTrack::AliMUONTrack(AliMUONSegment* BegSegment, AliMUONSegment* EndSegment)
+ : TObject(),
+ fTrackParamAtVertex(),
+ fTrackParamAtHit(0x0),
+ fHitForRecAtHit(0x0),
+ fNTrackHits(0),
+ fFitFMin(-1.),
+ fMatchTrigger(kFALSE),
+ fChi2MatchTrigger(0.),
+ fTrackID(0)
{
- // Constructor from two Segment's
- fEventReconstructor = EventReconstructor; // link back to EventReconstructor
- // memory allocation for the TObjArray of pointers to reconstructed TrackHit's
- fTrackHitsPtr = new TObjArray(10);
- fNTrackHits = 0;
- AddSegment(BegSegment); // add hits from BegSegment
- AddSegment(EndSegment); // add hits from EndSegment
- fTrackHitsPtr->Sort(); // sort TrackHits according to increasing Z
- SetTrackParamAtVertex(); // set track parameters at vertex
- // set fit conditions...
- fFitMCS = 0;
- fFitNParam = 3;
- fFitStart = 1;
- fFitFMin = -1.0;
- return;
+ /// Constructor from two Segment's
+
+ fTrackParamAtHit = new TClonesArray("AliMUONTrackParam",10);
+ fHitForRecAtHit = new TClonesArray("AliMUONHitForRec",10);
+
+ if (BegSegment) { //AZ
+ AddTrackParamAtHit(0,BegSegment->GetHitForRec1());
+ AddTrackParamAtHit(0,BegSegment->GetHitForRec2());
+ AddTrackParamAtHit(0,EndSegment->GetHitForRec1());
+ AddTrackParamAtHit(0,EndSegment->GetHitForRec2());
+ fTrackParamAtHit->Sort(); // sort TrackParamAtHit according to increasing Z
+ }
}
//__________________________________________________________________________
-AliMUONTrack::AliMUONTrack(AliMUONSegment* Segment, AliMUONHitForRec* HitForRec, AliMUONEventReconstructor* EventReconstructor)
+AliMUONTrack::AliMUONTrack(AliMUONSegment* Segment, AliMUONHitForRec* HitForRec)
+ : TObject(),
+ fTrackParamAtVertex(),
+ fTrackParamAtHit(0x0),
+ fHitForRecAtHit(0x0),
+ fNTrackHits(0),
+ fFitFMin(-1.),
+ fMatchTrigger(kFALSE),
+ fChi2MatchTrigger(0.),
+ fTrackID(0)
{
- // Constructor from one Segment and one HitForRec
- fEventReconstructor = EventReconstructor; // link back to EventReconstructor
- // memory allocation for the TObjArray of pointers to reconstructed TrackHit's
- fTrackHitsPtr = new TObjArray(10);
- fNTrackHits = 0;
- AddSegment(Segment); // add hits from Segment
- AddHitForRec(HitForRec); // add HitForRec
- fTrackHitsPtr->Sort(); // sort TrackHits according to increasing Z
- SetTrackParamAtVertex(); // set track parameters at vertex
- // set fit conditions...
- fFitMCS = 0;
- fFitNParam = 3;
- fFitStart = 1;
- fFitFMin = -1.0;
- return;
+ /// Constructor from one Segment and one HitForRec
+
+ fTrackParamAtHit = new TClonesArray("AliMUONTrackParam",10);
+ fHitForRecAtHit = new TClonesArray("AliMUONHitForRec",10);
+
+ AddTrackParamAtHit(0,Segment->GetHitForRec1());
+ AddTrackParamAtHit(0,Segment->GetHitForRec2());
+ AddTrackParamAtHit(0,HitForRec);
+ fTrackParamAtHit->Sort(); // sort TrackParamAtHit according to increasing Z
}
//__________________________________________________________________________
AliMUONTrack::~AliMUONTrack()
{
- // Destructor
- if (fTrackHitsPtr) {
- delete fTrackHitsPtr; // delete the TObjArray of pointers to TrackHit's
- fTrackHitsPtr = NULL;
+ /// Destructor
+ if (fTrackParamAtHit) {
+ // delete the TClonesArray of pointers to TrackParam
+ delete fTrackParamAtHit;
+ fTrackParamAtHit = NULL;
+ }
+
+ if (fHitForRecAtHit) {
+ // delete the TClonesArray of pointers to HitForRec
+ delete fHitForRecAtHit;
+ fHitForRecAtHit = NULL;
}
}
//__________________________________________________________________________
-AliMUONTrack::AliMUONTrack (const AliMUONTrack& MUONTrack)
+AliMUONTrack::AliMUONTrack (const AliMUONTrack& theMUONTrack)
+ : TObject(theMUONTrack),
+ fTrackParamAtVertex(theMUONTrack.fTrackParamAtVertex),
+ fTrackParamAtHit(0x0),
+ fHitForRecAtHit(0x0),
+ fNTrackHits(theMUONTrack.fNTrackHits),
+ fFitFMin(theMUONTrack.fFitFMin),
+ fMatchTrigger(theMUONTrack.fMatchTrigger),
+ fChi2MatchTrigger(theMUONTrack.fChi2MatchTrigger),
+ fTrackID(theMUONTrack.fTrackID)
{
-// Dummy copy constructor
+ ///copy constructor
+ Int_t maxIndex = 0;
+
+ // necessary to make a copy of the objects and not only the pointers in TClonesArray.
+ if (theMUONTrack.fTrackParamAtHit) {
+ maxIndex = (theMUONTrack.fTrackParamAtHit)->GetEntriesFast();
+ fTrackParamAtHit = new TClonesArray("AliMUONTrackParam",maxIndex);
+ for (Int_t index = 0; index < maxIndex; index++) {
+ new ((*fTrackParamAtHit)[index]) AliMUONTrackParam(*(AliMUONTrackParam*)theMUONTrack.fTrackParamAtHit->At(index));
+ }
+ }
+
+ // necessary to make a copy of the objects and not only the pointers in TClonesArray.
+ if (theMUONTrack.fHitForRecAtHit) {
+ maxIndex = (theMUONTrack.fHitForRecAtHit)->GetEntriesFast();
+ fHitForRecAtHit = new TClonesArray("AliMUONHitForRec",maxIndex);
+ for (Int_t index = 0; index < maxIndex; index++) {
+ new ((*fHitForRecAtHit)[index]) AliMUONHitForRec(*(AliMUONHitForRec*)theMUONTrack.fHitForRecAtHit->At(index));
+ }
+ }
+
}
//__________________________________________________________________________
-AliMUONTrack & AliMUONTrack::operator=(const AliMUONTrack& MUONTrack)
+AliMUONTrack & AliMUONTrack::operator=(const AliMUONTrack& theMUONTrack)
{
-// Dummy assignment operator
+ /// Asignment operator
+ // check assignement to self
+ if (this == &theMUONTrack)
return *this;
+
+ // base class assignement
+ TObject::operator=(theMUONTrack);
+
+ fTrackParamAtVertex = theMUONTrack.fTrackParamAtVertex;
+
+ Int_t maxIndex = 0;
+
+ // necessary to make a copy of the objects and not only the pointers in TClonesArray.
+ fTrackParamAtHit = 0;
+ if (theMUONTrack.fTrackParamAtHit) {
+ fTrackParamAtHit = new TClonesArray("AliMUONTrackParam",10);
+ maxIndex = (theMUONTrack.fTrackParamAtHit)->GetEntriesFast();
+ for (Int_t index = 0; index < maxIndex; index++) {
+ new ((*fTrackParamAtHit)[fTrackParamAtHit->GetEntriesFast()])
+ AliMUONTrackParam(*(AliMUONTrackParam*)(theMUONTrack.fTrackParamAtHit)->At(index));
+ }
+ }
+
+ // necessary to make a copy of the objects and not only the pointers in TClonesArray.
+ fHitForRecAtHit = 0;
+ if (theMUONTrack.fHitForRecAtHit) {
+ fHitForRecAtHit = new TClonesArray("AliMUONHitForRec",10);
+ maxIndex = (theMUONTrack.fHitForRecAtHit)->GetEntriesFast();
+ for (Int_t index = 0; index < maxIndex; index++) {
+ new ((*fHitForRecAtHit)[fHitForRecAtHit->GetEntriesFast()])
+ AliMUONHitForRec(*(AliMUONHitForRec*)(theMUONTrack.fHitForRecAtHit)->At(index));
+ }
+ }
+
+ fNTrackHits = theMUONTrack.fNTrackHits;
+ fFitFMin = theMUONTrack.fFitFMin;
+ fMatchTrigger = theMUONTrack.fMatchTrigger;
+ fChi2MatchTrigger = theMUONTrack.fChi2MatchTrigger;
+ fTrackID = theMUONTrack.fTrackID;
+
+ return *this;
}
//__________________________________________________________________________
-void AliMUONTrack::Remove()
+void AliMUONTrack::AddTrackParamAtHit(AliMUONTrackParam *trackParam, AliMUONHitForRec *hitForRec)
{
- // Remove current track from array of tracks,
- // and corresponding track hits from array of track hits.
- // Compress the TClonesArray it belongs to.
- AliMUONTrackHit *nextTrackHit;
- AliMUONEventReconstructor *eventRec = this->fEventReconstructor;
- TClonesArray *trackHitsPtr = eventRec->GetRecTrackHitsPtr();
- // Loop over all track hits of track
- AliMUONTrackHit *trackHit = (AliMUONTrackHit*) fTrackHitsPtr->First();
- while (trackHit) {
- nextTrackHit = (AliMUONTrackHit*) fTrackHitsPtr->After(trackHit);
- // Remove TrackHit from event TClonesArray.
- // Destructor is called,
- // hence links between HitForRec's and TrackHit's are updated
- trackHitsPtr->Remove(trackHit);
- trackHit = nextTrackHit;
+ /// Add TrackParamAtHit if "trackParam" != NULL else create empty TrackParamAtHit
+ /// Update link to HitForRec if "hitForRec" != NULL
+ if (!fTrackParamAtHit) {
+ fTrackParamAtHit = new TClonesArray("AliMUONTrackParam",10);
+ fNTrackHits = 0;
}
- // Remove the track from event TClonesArray
- // Destructor is called,
- // hence space for TObjArray of pointers to TrackHit's is freed
- eventRec->GetRecTracksPtr()->Remove(this);
- // Number of tracks decreased by 1
- eventRec->SetNRecTracks(eventRec->GetNRecTracks() - 1);
- // Compress event TClonesArray of Track's:
- // this is essential to retrieve the TClonesArray afterwards
- eventRec->GetRecTracksPtr()->Compress();
- // Compress event TClonesArray of TrackHit's:
- // this is probably also essential to retrieve the TClonesArray afterwards
- trackHitsPtr->Compress();
+ AliMUONTrackParam* trackParamAtHit;
+ if (trackParam) trackParamAtHit = new ((*fTrackParamAtHit)[fNTrackHits]) AliMUONTrackParam(*trackParam);
+ else trackParamAtHit = new ((*fTrackParamAtHit)[fNTrackHits]) AliMUONTrackParam();
+ if (hitForRec) trackParamAtHit->SetHitForRecPtr(hitForRec);
+ fNTrackHits++;
}
//__________________________________________________________________________
-void AliMUONTrack::SetFitMCS(Int_t FitMCS)
+void AliMUONTrack::AddHitForRecAtHit(const AliMUONHitForRec *hitForRec)
{
- // Set multiple Coulomb scattering option for track fit "fFitMCS"
- // from "FitMCS" argument: 0 without, 1 with
- if ((FitMCS == 0) || (FitMCS == 1)) fFitMCS = FitMCS;
- // better implementation with enum(with, without) ????
- else {
- cout << "ERROR in AliMUONTrack::SetFitMCS(FitMCS)" << endl;
- cout << "FitMCS = " << FitMCS << " is neither 0 nor 1" << endl;
- exit(0);
- }
- return;
+ /// Add hitForRec to the array of hitForRec at hit
+ if (!fHitForRecAtHit)
+ fHitForRecAtHit = new TClonesArray("AliMUONHitForRec",10);
+
+ if (!hitForRec)
+ AliFatal("AliMUONTrack::AddHitForRecAtHit: hitForRec == NULL");
+
+ new ((*fHitForRecAtHit)[fHitForRecAtHit->GetEntriesFast()]) AliMUONHitForRec(*hitForRec);
}
//__________________________________________________________________________
-void AliMUONTrack::SetFitNParam(Int_t FitNParam)
+Bool_t* AliMUONTrack::CompatibleTrack(AliMUONTrack * Track, Double_t Sigma2Cut) const
{
- // Set number of parameters for track fit "fFitNParam" from "FitNParam":
- // 3 for momentum, 5 for momentum and position
- if ((FitNParam == 3) || (FitNParam == 5)) fFitNParam = FitNParam;
- else {
- cout << "ERROR in AliMUONTrack::SetFitNParam(FitNParam)" << endl;
- cout << "FitNParam = " << FitNParam << " is neither 3 nor 5" << endl;
- exit(0);
+ /// Return kTRUE/kFALSE for each chamber if hit is compatible or not
+ TClonesArray *hitArray, *thisHitArray;
+ AliMUONHitForRec *hit, *thisHit;
+ Int_t chamberNumber;
+ Float_t deltaZ;
+ Float_t deltaZMax = 1.; // 1 cm
+ Float_t chi2 = 0;
+ Bool_t *nCompHit = new Bool_t[AliMUONConstants::NTrackingCh()];
+
+ for ( Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) {
+ nCompHit[ch] = kFALSE;
}
- return;
-}
- //__________________________________________________________________________
-void AliMUONTrack::SetFitStart(Int_t FitStart)
-{
- // Set multiple Coulomb scattering option for track fit "fFitStart"
- // from "FitStart" argument: 0 without, 1 with
- if ((FitStart == 0) || (FitStart == 1)) fFitStart = FitStart;
- // better implementation with enum(vertex, firstHit) ????
- else {
- cout << "ERROR in AliMUONTrack::SetFitStart(FitStart)" << endl;
- cout << "FitStart = " << FitStart << " is neither 0 nor 1" << endl;
- exit(0);
+ thisHitArray = this->GetHitForRecAtHit();
+
+ hitArray = Track->GetHitForRecAtHit();
+
+ for (Int_t iHthis = 0; iHthis < thisHitArray->GetEntriesFast(); iHthis++) {
+ thisHit = (AliMUONHitForRec*) thisHitArray->At(iHthis);
+ chamberNumber = thisHit->GetChamberNumber();
+ if (chamberNumber < 0 || chamberNumber > AliMUONConstants::NTrackingCh()) continue;
+ nCompHit[chamberNumber] = kFALSE;
+ for (Int_t iH = 0; iH < hitArray->GetEntriesFast(); iH++) {
+ hit = (AliMUONHitForRec*) hitArray->At(iH);
+ deltaZ = TMath::Abs(thisHit->GetZ() - hit->GetZ());
+ chi2 = thisHit->NormalizedChi2WithHitForRec(hit,Sigma2Cut); // set cut to 4 sigmas
+ if (chi2 < 3. && deltaZ < deltaZMax) {
+ nCompHit[chamberNumber] = kTRUE;
+ break;
+ }
+ }
}
- return;
+
+ return nCompHit;
}
//__________________________________________________________________________
-AliMUONTrackParam* AliMUONTrack::GetTrackParamAtFirstHit(void) {
- // Get pointer to TrackParamAtFirstHit
- return ((AliMUONTrackHit*) (fTrackHitsPtr->First()))->GetTrackParam();}
+Int_t AliMUONTrack::HitsInCommon(AliMUONTrack* Track) const
+{
+ /// Returns the number of hits in common between the current track ("this")
+ /// and the track pointed to by "Track".
+ Int_t hitsInCommon = 0;
+ AliMUONTrackParam *trackParamAtHit1, *trackParamAtHit2;
+ // Loop over hits of first track
+ trackParamAtHit1 = (AliMUONTrackParam*) this->fTrackParamAtHit->First();
+ while (trackParamAtHit1) {
+ // Loop over hits of second track
+ trackParamAtHit2 = (AliMUONTrackParam*) Track->fTrackParamAtHit->First();
+ while (trackParamAtHit2) {
+ // Increment "hitsInCommon" if both TrackParamAtHits point to the same HitForRec
+ if ((trackParamAtHit1->GetHitForRecPtr()) == (trackParamAtHit2->GetHitForRecPtr())) hitsInCommon++;
+ trackParamAtHit2 = (AliMUONTrackParam*) Track->fTrackParamAtHit->After(trackParamAtHit2);
+ } // trackParamAtHit2
+ trackParamAtHit1 = (AliMUONTrackParam*) this->fTrackParamAtHit->After(trackParamAtHit1);
+ } // trackParamAtHit1
+ return hitsInCommon;
+}
//__________________________________________________________________________
-void AliMUONTrack::RecursiveDump(void)
+void AliMUONTrack::RecursiveDump(void) const
{
- // Recursive dump of AliMUONTrack, i.e. with dump of TrackHit's and HitForRec's
- AliMUONTrackHit *trackHit;
+ /// Recursive dump of AliMUONTrack, i.e. with dump of TrackParamAtHit's and attached HitForRec's
+ AliMUONTrackParam *trackParamAtHit;
AliMUONHitForRec *hitForRec;
cout << "Recursive dump of Track: " << this << endl;
// Track
this->Dump();
for (Int_t trackHitIndex = 0; trackHitIndex < fNTrackHits; trackHitIndex++) {
- trackHit = (AliMUONTrackHit*) ((*fTrackHitsPtr)[trackHitIndex]);
+ trackParamAtHit = (AliMUONTrackParam*) ((*fTrackParamAtHit)[trackHitIndex]);
// TrackHit
- cout << "TrackHit: " << trackHit << " (index: " << trackHitIndex << ")" << endl;
- trackHit->Dump();
- hitForRec = trackHit->GetHitForRecPtr();
+ cout << "TrackParamAtHit: " << trackParamAtHit << " (index: " << trackHitIndex << ")" << endl;
+ trackParamAtHit->Dump();
+ hitForRec = trackParamAtHit->GetHitForRecPtr();
// HitForRec
cout << "HitForRec: " << hitForRec << endl;
hitForRec->Dump();
}
return;
}
-
- //__________________________________________________________________________
-Int_t AliMUONTrack::HitsInCommon(AliMUONTrack* Track)
-{
- // Returns the number of hits in common
- // between the current track ("this")
- // and the track pointed to by "Track".
- Int_t hitsInCommon = 0;
- AliMUONTrackHit *trackHit1, *trackHit2;
- // Loop over hits of first track
- trackHit1 = (AliMUONTrackHit*) this->GetTrackHitsPtr()->First();
- while (trackHit1) {
- // Loop over hits of second track
- trackHit2 = (AliMUONTrackHit*) Track->GetTrackHitsPtr()->First();
- while (trackHit2) {
- // Increment "hitsInCommon" if both TrackHits point to the same HitForRec
- if ( (trackHit1->GetHitForRecPtr()) ==
- (trackHit2->GetHitForRecPtr()) ) hitsInCommon++;
- trackHit2 = (AliMUONTrackHit*) Track->GetTrackHitsPtr()->After(trackHit2);
- } // trackHit2
- trackHit1 = (AliMUONTrackHit*) this->GetTrackHitsPtr()->After(trackHit1);
- } // trackHit1
- return hitsInCommon;
-}
-
- //__________________________________________________________________________
-void AliMUONTrack::Fit()
-{
- // Fit the current track ("this"),
- // with or without multiple Coulomb scattering according to "fFitMCS",
- // with the number of parameters given by "fFitNParam"
- // (3 if one keeps X and Y fixed in "TrackParam", 5 if one lets them vary),
- // starting, according to "fFitStart",
- // with track parameters at vertex or at the first TrackHit.
- // "fFitMCS", "fFitNParam" and "fFitStart" have to be set before
- // by calling the corresponding Set methods.
- Double_t arg[1], benC, errorParam, invBenP, lower, nonBenC, upper, x, y;
- char parName[50];
- AliMUONTrackParam *trackParam;
- // Check if Minuit is initialized...
- fgFitter = TVirtualFitter::Fitter(this); // add 3 or 5 for the maximum number of parameters ???
- fgFitter->Clear(); // necessary ???? probably yes
- // how to reset the printout number at every fit ????
- // is there any risk to leave it like that ????
- // how to go faster ???? choice of Minuit parameters like EDM ????
- // choice of function to be minimized according to fFitMCS
- if (fFitMCS == 0) fgFitter->SetFCN(TrackChi2);
- else fgFitter->SetFCN(TrackChi2MCS);
- arg[0] = 1;
- fgFitter->ExecuteCommand("SET PRINT", arg, 1); // More printing !!!!
- // Parameters according to "fFitStart"
- // (should be a function to be used at every place where needed ????)
- if (fFitStart == 0) trackParam = &fTrackParamAtVertex;
- else trackParam = this->GetTrackParamAtFirstHit();
- // set first 3 Minuit parameters
- // could be tried with no limits for the search (min=max=0) ????
- fgFitter->SetParameter(0, "InvBenP",
- trackParam->GetInverseBendingMomentum(),
- 0.003, -0.4, 0.4);
- fgFitter->SetParameter(1, "BenS",
- trackParam->GetBendingSlope(),
- 0.001, -0.5, 0.5);
- fgFitter->SetParameter(2, "NonBenS",
- trackParam->GetNonBendingSlope(),
- 0.001, -0.5, 0.5);
- if (fFitNParam == 5) {
- // set last 2 Minuit parameters (no limits for the search: min=max=0)
- fgFitter->SetParameter(3, "X",
- trackParam->GetNonBendingCoor(),
- 0.03, 0.0, 0.0);
- fgFitter->SetParameter(4, "Y",
- trackParam->GetBendingCoor(),
- 0.10, 0.0, 0.0);
- }
- // search without gradient calculation in the function
- fgFitter->ExecuteCommand("SET NOGRADIENT", arg, 0);
- // minimization
- fgFitter->ExecuteCommand("MINIMIZE", arg, 0);
- // exit from Minuit
- fgFitter->ExecuteCommand("EXIT", arg, 0); // necessary ????
- // get results into "invBenP", "benC", "nonBenC" ("x", "y")
- fgFitter->GetParameter(0, parName, invBenP, errorParam, lower, upper);
- fgFitter->GetParameter(1, parName, benC, errorParam, lower, upper);
- fgFitter->GetParameter(2, parName, nonBenC, errorParam, lower, upper);
- if (fFitNParam == 5) {
- fgFitter->GetParameter(3, parName, x, errorParam, lower, upper);
- fgFitter->GetParameter(4, parName, y, errorParam, lower, upper);
- }
- // result of the fit into track parameters
- trackParam->SetInverseBendingMomentum(invBenP);
- trackParam->SetBendingSlope(benC);
- trackParam->SetNonBendingSlope(nonBenC);
- if (fFitNParam == 5) {
- trackParam->SetNonBendingCoor(x);
- trackParam->SetBendingCoor(y);
- }
- // global result of the fit
- Double_t fedm, errdef;
- Int_t npari, nparx;
- fgFitter->GetStats(fFitFMin, fedm, errdef, npari, nparx);
-}
-
- //__________________________________________________________________________
-void AliMUONTrack::AddSegment(AliMUONSegment* Segment)
-{
- // Add Segment to the track
- AddHitForRec(Segment->GetHitForRec1()); // 1st hit
- AddHitForRec(Segment->GetHitForRec2()); // 2nd hit
-}
-
- //__________________________________________________________________________
-void AliMUONTrack::AddHitForRec(AliMUONHitForRec* HitForRec)
-{
- // Add HitForRec to the track:
- // actual TrackHit into TClonesArray of TrackHit's for the event;
- // pointer to actual TrackHit in TObjArray of pointers to TrackHit's for the track
- TClonesArray *recTrackHitsPtr = this->fEventReconstructor->GetRecTrackHitsPtr();
- Int_t eventTrackHits = this->fEventReconstructor->GetNRecTrackHits();
- // event
- AliMUONTrackHit* trackHit =
- new ((*recTrackHitsPtr)[eventTrackHits]) AliMUONTrackHit(HitForRec);
- this->fEventReconstructor->SetNRecTrackHits(eventTrackHits + 1);
- // track
- fTrackHitsPtr->Add(trackHit);
- fNTrackHits++;
-}
-
- //__________________________________________________________________________
-void AliMUONTrack::SetTrackParamAtHit(Int_t indexHit, AliMUONTrackParam *TrackParam)
-{
- // Set track parameters at TrackHit with index "indexHit"
- // from the track parameters pointed to by "TrackParam".
- AliMUONTrackHit* trackHit = (AliMUONTrackHit*) ((*fTrackHitsPtr)[indexHit]);
- trackHit->SetTrackParam(TrackParam);
-}
-
- //__________________________________________________________________________
-void AliMUONTrack::SetTrackParamAtVertex()
-{
- // Set track parameters at vertex.
- // TrackHit's are assumed to be only in stations(1..) 4 and 5,
- // and sorted according to increasing Z..
- // Parameters are calculated from information in HitForRec's
- // of first and last TrackHit's.
- AliMUONTrackParam *trackParam =
- &fTrackParamAtVertex; // pointer to track parameters
- // Pointer to HitForRec of first TrackHit
- AliMUONHitForRec *firstHit =
- ((AliMUONTrackHit*) (fTrackHitsPtr->First()))->GetHitForRecPtr();
- // Pointer to HitForRec of last TrackHit
- AliMUONHitForRec *lastHit =
- ((AliMUONTrackHit*) (fTrackHitsPtr->Last()))->GetHitForRecPtr();
- // Z difference between first and last hits
- Double_t deltaZ = firstHit->GetZ() - lastHit->GetZ();
- // bending slope in stations(1..) 4 and 5
- Double_t bendingSlope =
- (firstHit->GetBendingCoor() - lastHit->GetBendingCoor()) / deltaZ;
- trackParam->SetBendingSlope(bendingSlope);
- // impact parameter
- Double_t impactParam =
- firstHit->GetBendingCoor() - bendingSlope * firstHit->GetZ(); // same if from firstHit and lastHit ????
- // signed bending momentum
- Double_t signedBendingMomentum =
- fEventReconstructor->GetBendingMomentumFromImpactParam(impactParam);
- trackParam->SetInverseBendingMomentum(1.0 / signedBendingMomentum);
- // bending slope at vertex
- trackParam->
- SetBendingSlope(bendingSlope +
- impactParam / fEventReconstructor->GetSimpleBPosition());
- // non bending slope
- Double_t nonBendingSlope =
- (firstHit->GetNonBendingCoor() - lastHit->GetNonBendingCoor()) / deltaZ;
- trackParam->SetNonBendingSlope(nonBendingSlope);
- // vertex coordinates at (0,0,0)
- trackParam->SetZ(0.0);
- trackParam->SetBendingCoor(0.0);
- trackParam->SetNonBendingCoor(0.0);
-}
-
- //__________________________________________________________________________
-void TrackChi2(Int_t &NParam, Double_t *Gradient, Double_t &Chi2, Double_t *Param, Int_t Flag)
-{
- // Return the "Chi2" to be minimized with Minuit for track fitting,
- // with "NParam" parameters
- // and their current values in array pointed to by "Param".
- // Assumes that the track hits are sorted according to increasing Z.
- // Track parameters at each TrackHit are updated accordingly.
- // Multiple Coulomb scattering is not taken into account
- AliMUONTrack *trackBeingFitted;
- AliMUONTrackHit* hit;
- AliMUONTrackParam param1;
- Int_t hitNumber;
- Double_t zHit;
- Chi2 = 0.0; // initialize Chi2
- // copy of track parameters to be fitted
- trackBeingFitted = (AliMUONTrack*) AliMUONTrack::Fitter()->GetObjectFit();
- if (trackBeingFitted->GetFitStart() == 0)
- param1 = *(trackBeingFitted->GetTrackParamAtVertex());
- else param1 = *(trackBeingFitted->GetTrackParamAtFirstHit());
- // Minuit parameters to be fitted into this copy
- param1.SetInverseBendingMomentum(Param[0]);
- param1.SetBendingSlope(Param[1]);
- param1.SetNonBendingSlope(Param[2]);
- if (NParam == 5) {
- param1.SetNonBendingCoor(Param[3]);
- param1.SetBendingCoor(Param[4]);
- }
- // Follow track through all planes of track hits
- for (hitNumber = 0; hitNumber < trackBeingFitted->GetNTrackHits(); hitNumber++) {
- hit = (AliMUONTrackHit*) (*(trackBeingFitted->GetTrackHitsPtr()))[hitNumber];
- zHit = hit->GetHitForRecPtr()->GetZ();
- // do something special if 2 hits with same Z ????
- // security against infinite loop ????
- (¶m1)->ExtrapToZ(zHit); // extrapolation
- hit->SetTrackParam(¶m1);
- // Increment Chi2
- // done hit per hit, with hit resolution,
- // and not with point and angle like in "reco_muon.F" !!!!
- // Needs to add multiple scattering contribution ????
- Double_t dX =
- hit->GetHitForRecPtr()->GetNonBendingCoor() - (¶m1)->GetNonBendingCoor();
- Double_t dY =
- hit->GetHitForRecPtr()->GetBendingCoor() - (¶m1)->GetBendingCoor();
- Chi2 =
- Chi2 +
- dX * dX / hit->GetHitForRecPtr()->GetNonBendingReso2() +
- dY * dY / hit->GetHitForRecPtr()->GetBendingReso2();
- }
-}
-
- //__________________________________________________________________________
-void TrackChi2MCS(Int_t &NParam, Double_t *Gradient, Double_t &Chi2, Double_t *Param, Int_t Flag)
+
+//_____________________________________________-
+void AliMUONTrack::Print(Option_t* opt) const
{
- // Return the "Chi2" to be minimized with Minuit for track fitting,
- // with "NParam" parameters
- // and their current values in array pointed to by "Param".
- // Assumes that the track hits are sorted according to increasing Z.
- // Track parameters at each TrackHit are updated accordingly.
- // Multiple Coulomb scattering is taken into account with covariance matrix.
- AliMUONTrack *trackBeingFitted;
- AliMUONTrackParam param1;
- Chi2 = 0.0; // initialize Chi2
- // copy of track parameters to be fitted
- trackBeingFitted = (AliMUONTrack*) AliMUONTrack::Fitter()->GetObjectFit();
- if (trackBeingFitted->GetFitStart() == 0)
- param1 = *(trackBeingFitted->GetTrackParamAtVertex());
- else param1 = *(trackBeingFitted->GetTrackParamAtFirstHit());
- // Minuit parameters to be fitted into this copy
- param1.SetInverseBendingMomentum(Param[0]);
- param1.SetBendingSlope(Param[1]);
- param1.SetNonBendingSlope(Param[2]);
- if (NParam == 5) {
- param1.SetNonBendingCoor(Param[3]);
- param1.SetBendingCoor(Param[4]);
- }
-
- AliMUONTrackHit *hit;
- Bool_t goodDeterminant;
- Int_t hitNumber, hitNumber1, hitNumber2, hitNumber3;
- Double_t zHit[10], paramBendingCoor[10], paramNonBendingCoor[10], ap[10];
- Double_t hitBendingCoor[10], hitNonBendingCoor[10];
- Double_t hitBendingReso2[10], hitNonBendingReso2[10];
- // dimension 10 in parameter ??? related to AliMUONConstants::NTrackingCh() !!!!
- Int_t numberOfHit = TMath::Min(trackBeingFitted->GetNTrackHits(), 10);
- TMatrix *covBending = new TMatrix(numberOfHit, numberOfHit);
- TMatrix *covNonBending = new TMatrix(numberOfHit, numberOfHit);
-
- // Predicted coordinates and multiple scattering angles are first calculated
- for (hitNumber = 0; hitNumber < numberOfHit; hitNumber++) {
- hit = (AliMUONTrackHit*) (*(trackBeingFitted->GetTrackHitsPtr()))[hitNumber];
- zHit[hitNumber] = hit->GetHitForRecPtr()->GetZ();
- // do something special if 2 hits with same Z ????
- // security against infinite loop ????
- (¶m1)->ExtrapToZ(zHit[hitNumber]); // extrapolation
- hit->SetTrackParam(¶m1);
- paramBendingCoor[hitNumber] = (¶m1)->GetBendingCoor();
- paramNonBendingCoor[hitNumber] = (¶m1)->GetNonBendingCoor();
- hitBendingCoor[hitNumber] = hit->GetHitForRecPtr()->GetBendingCoor();
- hitNonBendingCoor[hitNumber] = hit->GetHitForRecPtr()->GetNonBendingCoor();
- hitBendingReso2[hitNumber] = hit->GetHitForRecPtr()->GetBendingReso2();
- hitNonBendingReso2[hitNumber] = hit->GetHitForRecPtr()->GetNonBendingReso2();
- ap[hitNumber] = MultipleScatteringAngle2(hit); // multiple scatt. angle ^2
- }
-
- // Calculates the covariance matrix
- // One chamber is taken into account between successive hits.
- // "ap" should be changed for taking into account the eventual missing hits
- // by defining an "equivalent" chamber thickness !!!!
- for (hitNumber1 = 0; hitNumber1 < numberOfHit; hitNumber1++) {
- for (hitNumber2 = hitNumber1; hitNumber2 < numberOfHit; hitNumber2++) {
- // initialization to 0 (diagonal plus upper triangular part)
- (*covBending)(hitNumber2, hitNumber1) = 0.0;
- // contribution from multiple scattering in bending plane:
- // loop over upstream hits
- for (hitNumber3 = 0; hitNumber3 < hitNumber1; hitNumber3++) {
- (*covBending)(hitNumber2, hitNumber1) =
- (*covBending)(hitNumber2, hitNumber1) +
- ((zHit[hitNumber1] - zHit[hitNumber3]) *
- (zHit[hitNumber2] - zHit[hitNumber3]) * ap[hitNumber3]);
- }
- // equal contribution from multiple scattering in non bending plane
- (*covNonBending)(hitNumber2, hitNumber1) =
- (*covBending)(hitNumber2, hitNumber1);
- if (hitNumber1 == hitNumber2) {
- // Diagonal elements: add contribution from position measurements
- // in bending plane
- (*covBending)(hitNumber2, hitNumber1) =
- (*covBending)(hitNumber2, hitNumber1) + hitBendingReso2[hitNumber1];
- // and in non bending plane
- (*covNonBending)(hitNumber2, hitNumber1) =
- (*covNonBending)(hitNumber2, hitNumber1) + hitNonBendingReso2[hitNumber1];
- }
- else {
- // Non diagonal elements: symmetrization
- // for bending plane
- (*covBending)(hitNumber1, hitNumber2) =
- (*covBending)(hitNumber2, hitNumber1);
- // and non bending plane
- (*covNonBending)(hitNumber1, hitNumber2) =
- (*covNonBending)(hitNumber2, hitNumber1);
- }
- } // for (hitNumber2 = hitNumber1;...
- } // for (hitNumber1 = 0;...
-
- // Inverts covariance matrix
- goodDeterminant = kTRUE;
- // check whether the Invert method returns flag if matrix cannot be inverted,
- // and do not calculate the Determinant in that case !!!!
- if (covBending->Determinant() != 0) {
- covBending->Invert();
- } else {
- goodDeterminant = kFALSE;
- cout << "Warning in ChiMCS Determinant Bending=0: " << endl;
- }
- if (covNonBending->Determinant() != 0) {
- covNonBending->Invert();
- } else {
- goodDeterminant = kFALSE;
- cout << "Warning in ChiMCS Determinant non Bending=0: " << endl;
+ /// Printing Track information
+ /// "full" option for printing all the information about the track
+ TString sopt(opt);
+ sopt.ToUpper();
+
+ if ( sopt.Contains("FULL") ) {
+ cout << "<AliMUONTrack> No.Clusters=" << setw(2) << GetNTrackHits() <<
+ // ", Bending P="<< setw(8) << setprecision(5) << 1./GetInverseBendingMomentum() <<
+ //", NonBendSlope=" << setw(8) << setprecision(5) << GetNonBendingSlope()*180./TMath::Pi() <<
+ //", BendSlope=" << setw(8) << setprecision(5) << GetBendingSlope()*180./TMath::Pi() <<
+ ", Match2Trig=" << setw(1) << GetMatchTrigger() <<
+ ", Chi2-tracking-trigger=" << setw(8) << setprecision(5) << GetChi2MatchTrigger() << endl ;
+ GetTrackParamAtHit()->First()->Print("full");
}
+ else {
+ cout << "<AliMUONTrack>";
+ GetTrackParamAtHit()->First()->Print("");
- // It would be worth trying to calculate the inverse of the covariance matrix
- // only once per fit, since it cannot change much in principle,
- // and it would save a lot of computing time !!!!
-
- // Calculates Chi2
- if (goodDeterminant) { // with Multiple Scattering if inversion correct
- for (hitNumber1=0; hitNumber1 < numberOfHit ; hitNumber1++){
- for (hitNumber2=0; hitNumber2 < numberOfHit; hitNumber2++){
- Chi2 = Chi2 +
- ((*covBending)(hitNumber2, hitNumber1) *
- (hitBendingCoor[hitNumber1] - paramBendingCoor[hitNumber1]) *
- (hitBendingCoor[hitNumber2] - paramBendingCoor[hitNumber2]));
- Chi2 = Chi2 +
- ((*covNonBending)(hitNumber2, hitNumber1) *
- (hitNonBendingCoor[hitNumber1] - paramNonBendingCoor[hitNumber1]) *
- (hitNonBendingCoor[hitNumber2] - paramNonBendingCoor[hitNumber2]));
- }
- }
- } else { // without Multiple Scattering if inversion impossible
- for (hitNumber1=0; hitNumber1 < numberOfHit ; hitNumber1++) {
- Chi2 = Chi2 +
- ((hitBendingCoor[hitNumber1] - paramBendingCoor[hitNumber1]) *
- (hitBendingCoor[hitNumber1] - paramBendingCoor[hitNumber1]) /
- hitBendingReso2[hitNumber1]);
- Chi2 = Chi2 +
- ((hitNonBendingCoor[hitNumber1] - paramNonBendingCoor[hitNumber1]) *
- (hitNonBendingCoor[hitNumber1] - paramNonBendingCoor[hitNumber1]) /
- hitNonBendingReso2[hitNumber1]);
- }
}
-
- delete covBending;
- delete covNonBending;
-}
-
-Double_t MultipleScatteringAngle2(AliMUONTrackHit *TrackHit)
-{
- // Returns square of multiple Coulomb scattering angle
- // at TrackHit pointed to by "TrackHit"
- Double_t slopeBending, slopeNonBending, radiationLength, inverseBendingMomentum2, inverseTotalMomentum2;
- Double_t varMultipleScatteringAngle;
- AliMUONTrack *trackBeingFitted = (AliMUONTrack*) AliMUONTrack::Fitter()->GetObjectFit();
- AliMUONTrackParam *param = TrackHit->GetTrackParam();
- // Better implementation in AliMUONTrack class ????
- slopeBending = param->GetBendingSlope();
- slopeNonBending = param->GetNonBendingSlope();
- // thickness in radiation length for the current track,
- // taking local angle into account
- radiationLength =
- trackBeingFitted->GetEventReconstructor()->GetChamberThicknessInX0() *
- TMath::Sqrt(1.0 +
- slopeBending * slopeBending + slopeNonBending * slopeNonBending);
- inverseBendingMomentum2 =
- param->GetInverseBendingMomentum() * param->GetInverseBendingMomentum();
- inverseTotalMomentum2 =
- inverseBendingMomentum2 * (1.0 + slopeBending * slopeBending) /
- (1.0 + slopeBending *slopeBending + slopeNonBending * slopeNonBending);
- varMultipleScatteringAngle = 0.0136 * (1.0 + 0.038 * TMath::Log(radiationLength));
- // The velocity is assumed to be 1 !!!!
- varMultipleScatteringAngle = inverseTotalMomentum2 * radiationLength *
- varMultipleScatteringAngle * varMultipleScatteringAngle;
- return varMultipleScatteringAngle;
+
}