* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.7 2000/09/19 15:50:46 gosset
-TrackChi2MCS function: covariance matrix better calculated,
-taking into account missing planes...
-
-Revision 1.6 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 1.5 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++
-*/
-
-//__________________________________________________________________________
-//
-// Reconstructed track in ALICE dimuon spectrometer
-//__________________________________________________________________________
+/* $Id$ */
-#include "AliMUONTrack.h"
+///////////////////////////////////////////////////
+//
+// Reconstructed track
+// in
+// ALICE
+// dimuon
+// spectrometer
+//
+///////////////////////////////////////////////////
-#include <iostream.h>
+#include <Riostream.h> // for cout
+#include <stdlib.h> // for exit()
#include <TClonesArray.h>
#include <TMath.h>
#include "AliMUONEventReconstructor.h"
#include "AliMUONHitForRec.h"
#include "AliMUONSegment.h"
+#include "AliMUONTrack.h"
#include "AliMUONTrackHit.h"
-
-#include <stdlib.h>
+#include "AliMUONTriggerTrack.h"
+#include "AliMUONConstants.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);
+void mnvertLocal(Double_t* a, Int_t l, Int_t m, Int_t n, Int_t& ifail);
+
Double_t MultipleScatteringAngle2(AliMUONTrackHit *TrackHit);
ClassImp(AliMUONTrack) // Class implementation in ROOT context
TVirtualFitter* AliMUONTrack::fgFitter = NULL;
+ //__________________________________________________________________________
+AliMUONTrack::AliMUONTrack()
+{
+ // Default constructor
+ fgFitter = 0;
+ fEventReconstructor = 0;
+ fTrackHitsPtr = 0;
+ fTrackParamAtHit = new TClonesArray("AliMUONTrackParam",10);
+}
+
//__________________________________________________________________________
AliMUONTrack::AliMUONTrack(AliMUONSegment* BegSegment, AliMUONSegment* EndSegment, AliMUONEventReconstructor* EventReconstructor)
{
AddSegment(EndSegment); // add hits from EndSegment
fTrackHitsPtr->Sort(); // sort TrackHits according to increasing Z
SetTrackParamAtVertex(); // set track parameters at vertex
+ fTrackParamAtHit = new TClonesArray("AliMUONTrackParam",10);
// set fit conditions...
fFitMCS = 0;
fFitNParam = 3;
fFitStart = 1;
fFitFMin = -1.0;
+ fMatchTrigger = kFALSE;
+ fChi2MatchTrigger = 0;
return;
}
AddHitForRec(HitForRec); // add HitForRec
fTrackHitsPtr->Sort(); // sort TrackHits according to increasing Z
SetTrackParamAtVertex(); // set track parameters at vertex
+ fTrackParamAtHit = new TClonesArray("AliMUONTrackParam",10);
// set fit conditions...
fFitMCS = 0;
fFitNParam = 3;
fFitStart = 1;
fFitFMin = -1.0;
+ fMatchTrigger = kFALSE;
+ fChi2MatchTrigger = 0;
return;
}
delete fTrackHitsPtr; // delete the TObjArray of pointers to TrackHit's
fTrackHitsPtr = NULL;
}
+
+ if (fTrackParamAtHit) {
+ // delete the TClonesArray of pointers to TrackParam
+ delete fTrackParamAtHit;
+ fTrackParamAtHit = NULL;
+ }
}
//__________________________________________________________________________
-AliMUONTrack::AliMUONTrack (const AliMUONTrack& MUONTrack)
+AliMUONTrack::AliMUONTrack (const AliMUONTrack& MUONTrack):TObject(MUONTrack)
{
-// Dummy copy constructor
+ fEventReconstructor = new AliMUONEventReconstructor(*MUONTrack.fEventReconstructor); // is it right ?
+ fTrackParamAtVertex = MUONTrack.fTrackParamAtVertex;
+ fTrackHitsPtr = new TObjArray(*MUONTrack.fTrackHitsPtr); // is it right ?
+ fTrackParamAtHit = new TClonesArray(*MUONTrack.fTrackParamAtHit);
+ fNTrackHits = MUONTrack.fNTrackHits;
+ fFitMCS = MUONTrack.fFitMCS;
+ fFitNParam = MUONTrack.fFitNParam;
+ fFitFMin = MUONTrack.fFitFMin;
+ fFitStart = MUONTrack.fFitStart;
+ fMatchTrigger = MUONTrack.fMatchTrigger;
+ fChi2MatchTrigger = MUONTrack.fChi2MatchTrigger;
}
//__________________________________________________________________________
AliMUONTrack & AliMUONTrack::operator=(const AliMUONTrack& MUONTrack)
{
-// Dummy assignment operator
+ if (this == &MUONTrack)
return *this;
+
+ fEventReconstructor = new AliMUONEventReconstructor(*MUONTrack.fEventReconstructor); // is it right ?
+ fTrackParamAtVertex = MUONTrack.fTrackParamAtVertex;
+ fTrackHitsPtr = new TObjArray(*MUONTrack.fTrackHitsPtr); // is it right ?
+ fTrackParamAtHit = new TClonesArray(*MUONTrack.fTrackParamAtHit);
+ fNTrackHits = MUONTrack.fNTrackHits;
+ fFitMCS = MUONTrack.fFitMCS;
+ fFitNParam = MUONTrack.fFitNParam;
+ fFitFMin = MUONTrack.fFitFMin;
+ fFitStart = MUONTrack.fFitStart;
+ fMatchTrigger = MUONTrack.fMatchTrigger;
+ fChi2MatchTrigger = MUONTrack.fChi2MatchTrigger;
+ return *this;
}
//__________________________________________________________________________
}
//__________________________________________________________________________
-AliMUONTrackParam* AliMUONTrack::GetTrackParamAtFirstHit(void) {
+AliMUONTrackParam* AliMUONTrack::GetTrackParamAtFirstHit(void) const {
// Get pointer to TrackParamAtFirstHit
return ((AliMUONTrackHit*) (fTrackHitsPtr->First()))->GetTrackParam();}
//__________________________________________________________________________
-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;
return hitsInCommon;
}
+ //__________________________________________________________________________
+void AliMUONTrack::MatchTriggerTrack(TClonesArray *triggerTrackArray)
+{
+ // Match this track with one trigger track if possible
+ AliMUONTrackParam *trackParam;
+ AliMUONTriggerTrack *triggerTrack;
+ Double_t xTrack, yTrack, ySlopeTrack, dTrigTrackMin2, dTrigTrack2;
+ Double_t nSigmaCut2;
+
+ Double_t distSigma[3]={1,1,0.02}; // sigma of distributions (trigger-track) X,Y,slopeY
+ Double_t distTriggerTrack[3] = {0,0,0};
+
+ fMatchTrigger = kFALSE;
+ fChi2MatchTrigger = 0;
+
+ trackParam = (AliMUONTrackParam*) fTrackParamAtHit->Last();
+ trackParam->ExtrapToZ(AliMUONConstants::DefaultChamberZ(10)); // extrap to 1st trigger chamber
+
+ nSigmaCut2 = fEventReconstructor->GetMaxSigma2Distance(); // nb of sigma**2 for cut
+ xTrack = trackParam->GetNonBendingCoor();
+ yTrack = trackParam->GetBendingCoor();
+ ySlopeTrack = trackParam->GetBendingSlope();
+ dTrigTrackMin2 = 999;
+
+ triggerTrack = (AliMUONTriggerTrack*) triggerTrackArray->First();
+ while(triggerTrack){
+ distTriggerTrack[0] = (triggerTrack->GetX11()-xTrack)/distSigma[0];
+ distTriggerTrack[1] = (triggerTrack->GetY11()-yTrack)/distSigma[1];
+ distTriggerTrack[2] = (TMath::Tan(triggerTrack->GetThetay())-ySlopeTrack)/distSigma[2];
+ dTrigTrack2 = 0;
+ for (Int_t iVar = 0; iVar < 3; iVar++)
+ dTrigTrack2 += distTriggerTrack[iVar]*distTriggerTrack[iVar];
+ if (dTrigTrack2 < dTrigTrackMin2 && dTrigTrack2 < nSigmaCut2) {
+ dTrigTrackMin2 = dTrigTrack2;
+ fMatchTrigger = kTRUE;
+ fChi2MatchTrigger = dTrigTrack2/3.; // Normalized Chi2, 3 variables (X,Y,slopeY)
+ }
+ triggerTrack = (AliMUONTriggerTrack*) triggerTrackArray->After(triggerTrack);
+ }
+
+}
//__________________________________________________________________________
void AliMUONTrack::Fit()
{
// choice of function to be minimized according to fFitMCS
if (fFitMCS == 0) fgFitter->SetFCN(TrackChi2);
else fgFitter->SetFCN(TrackChi2MCS);
+ // Switch off printout
arg[0] = -1;
fgFitter->ExecuteCommand("SET PRINT", arg, 1); // More printing !!!!
+ // No warnings
+ fgFitter->ExecuteCommand("SET NOW", arg, 0);
// Parameters according to "fFitStart"
// (should be a function to be used at every place where needed ????)
if (fFitStart == 0) trackParam = &fTrackParamAtVertex;
// minimization
fgFitter->ExecuteCommand("MINIMIZE", arg, 0);
// exit from Minuit
- fgFitter->ExecuteCommand("EXIT", arg, 0); // necessary ????
+ // 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);
}
//__________________________________________________________________________
-void AliMUONTrack::SetTrackParamAtHit(Int_t indexHit, AliMUONTrackParam *TrackParam)
+void AliMUONTrack::SetTrackParamAtHit(Int_t indexHit, AliMUONTrackParam *TrackParam) const
{
// Set track parameters at TrackHit with index "indexHit"
// from the track parameters pointed to by "TrackParam".
- AliMUONTrackHit* trackHit = (AliMUONTrackHit*) ((*fTrackHitsPtr)[indexHit]);
+ //PH AliMUONTrackHit* trackHit = (AliMUONTrackHit*) ((*fTrackHitsPtr)[indexHit]);
+ AliMUONTrackHit* trackHit = (AliMUONTrackHit*) (fTrackHitsPtr->At(indexHit));
trackHit->SetTrackParam(TrackParam);
}
}
//__________________________________________________________________________
-void TrackChi2(Int_t &NParam, Double_t *Gradient, Double_t &Chi2, Double_t *Param, Int_t Flag)
+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
}
//__________________________________________________________________________
-void TrackChi2MCS(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*/)
{
// Return the "Chi2" to be minimized with Minuit for track fitting,
// with "NParam" parameters
}
AliMUONTrackHit *hit;
- Bool_t goodDeterminant;
- Int_t chCurrent, chPrev, hitNumber, hitNumber1, hitNumber2, hitNumber3;
+ Int_t chCurrent, chPrev = 0, hitNumber, hitNumber1, hitNumber2, hitNumber3;
Double_t z, z1, z2, z3;
AliMUONTrackHit *hit1, *hit2, *hit3;
Double_t hbc1, hbc2, pbc1, pbc2;
}
} // for (hitNumber2 = hitNumber1;...
} // for (hitNumber1 = 0;...
- // Normalization of covariance matrices
- Double_t normCovBending2 = covBending->E2Norm();
- Double_t normCovNonBending2 = covNonBending->E2Norm();
- (*covBending) *= 1/normCovBending2;
- (*covNonBending) *= 1/normCovNonBending2;
-// if (covBending->Determinant() < 1.e-33) {
-// printf(" *** covBending *** \n");
-// covBending->Print();
-// printf(" *** covNonBending *** \n");
-// covNonBending->Print();
-// cout << " number of hits " << numberOfHit << endl;
-// cout << "Momentum = " << 1/Param[0] <<endl;
-// cout << "normCovBending = " << normCovBending2 << endl;
-// cout << "normCovNonBending = " << normCovNonBending2 << endl;
-// exit(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;
- }
+ // Inversion of covariance matrices
+ // with "mnvertLocal", local "mnvert" function of Minuit.
+ // One cannot use directly "mnvert" since "TVirtualFitter" does not know it.
+ // One will have to replace this local function by the right inversion function
+ // from a specialized Root package for symmetric positive definite matrices,
+ // when available!!!!
+ Int_t ifailBending;
+ mnvertLocal(&((*covBending)(0,0)), numberOfHit, numberOfHit, numberOfHit,
+ ifailBending);
+ Int_t ifailNonBending;
+ mnvertLocal(&((*covNonBending)(0,0)), numberOfHit, numberOfHit, numberOfHit,
+ ifailNonBending);
// 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) {
+ if ((ifailBending == 0) && (ifailNonBending == 0)) {
// with Multiple Scattering if inversion correct
- // Inverse matrices without normalization
- (*covBending) *= 1/normCovBending2;
- (*covNonBending) *= 1/normCovNonBending2;
for (hitNumber1 = 0; hitNumber1 < numberOfHit ; hitNumber1++) {
hit1 = (AliMUONTrackHit*) (*(trackBeingFitted->GetTrackHitsPtr()))[hitNumber1];
hbc1 = hit1->GetHitForRecPtr()->GetBendingCoor();
varMultipleScatteringAngle * varMultipleScatteringAngle;
return varMultipleScatteringAngle;
}
+
+//______________________________________________________________________________
+ void mnvertLocal(Double_t *a, Int_t l, Int_t, Int_t n, Int_t &ifail)
+{
+//*-*-*-*-*-*-*-*-*-*-*-*Inverts a symmetric matrix*-*-*-*-*-*-*-*-*-*-*-*-*
+//*-* ==========================
+//*-* inverts a symmetric matrix. matrix is first scaled to
+//*-* have all ones on the diagonal (equivalent to change of units)
+//*-* but no pivoting is done since matrix is positive-definite.
+//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
+
+ // taken from TMinuit package of Root (l>=n)
+ // fVERTs, fVERTq and fVERTpp changed to localVERTs, localVERTq and localVERTpp
+ // Double_t localVERTs[n], localVERTq[n], localVERTpp[n];
+ Double_t * localVERTs = new Double_t[n];
+ Double_t * localVERTq = new Double_t[n];
+ Double_t * localVERTpp = new Double_t[n];
+ // fMaxint changed to localMaxint
+ Int_t localMaxint = n;
+
+ /* System generated locals */
+ Int_t aOffset;
+
+ /* Local variables */
+ Double_t si;
+ Int_t i, j, k, kp1, km1;
+
+ /* Parameter adjustments */
+ aOffset = l + 1;
+ a -= aOffset;
+
+ /* Function Body */
+ ifail = 0;
+ if (n < 1) goto L100;
+ if (n > localMaxint) goto L100;
+//*-*- scale matrix by sqrt of diag elements
+ for (i = 1; i <= n; ++i) {
+ si = a[i + i*l];
+ if (si <= 0) goto L100;
+ localVERTs[i-1] = 1 / TMath::Sqrt(si);
+ }
+ for (i = 1; i <= n; ++i) {
+ for (j = 1; j <= n; ++j) {
+ a[i + j*l] = a[i + j*l]*localVERTs[i-1]*localVERTs[j-1];
+ }
+ }
+//*-*- . . . start main loop . . . .
+ for (i = 1; i <= n; ++i) {
+ k = i;
+//*-*- preparation for elimination step1
+ if (a[k + k*l] != 0) localVERTq[k-1] = 1 / a[k + k*l];
+ else goto L100;
+ localVERTpp[k-1] = 1;
+ a[k + k*l] = 0;
+ kp1 = k + 1;
+ km1 = k - 1;
+ if (km1 < 0) goto L100;
+ else if (km1 == 0) goto L50;
+ else goto L40;
+L40:
+ for (j = 1; j <= km1; ++j) {
+ localVERTpp[j-1] = a[j + k*l];
+ localVERTq[j-1] = a[j + k*l]*localVERTq[k-1];
+ a[j + k*l] = 0;
+ }
+L50:
+ if (k - n < 0) goto L51;
+ else if (k - n == 0) goto L60;
+ else goto L100;
+L51:
+ for (j = kp1; j <= n; ++j) {
+ localVERTpp[j-1] = a[k + j*l];
+ localVERTq[j-1] = -a[k + j*l]*localVERTq[k-1];
+ a[k + j*l] = 0;
+ }
+//*-*- elimination proper
+L60:
+ for (j = 1; j <= n; ++j) {
+ for (k = j; k <= n; ++k) { a[j + k*l] += localVERTpp[j-1]*localVERTq[k-1]; }
+ }
+ }
+//*-*- elements of left diagonal and unscaling
+ for (j = 1; j <= n; ++j) {
+ for (k = 1; k <= j; ++k) {
+ a[k + j*l] = a[k + j*l]*localVERTs[k-1]*localVERTs[j-1];
+ a[j + k*l] = a[k + j*l];
+ }
+ }
+ delete localVERTs;
+ delete localVERTq;
+ delete localVERTpp;
+ return;
+//*-*- failure return
+L100:
+ delete localVERTs;
+ delete localVERTq;
+ delete localVERTpp;
+ ifail = 1;
+} /* mnvertLocal */
+
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