#include <TMath.h>
#include "AliCluster.h"
-#include "AliESDtrack.h"
#include "AliESDVertex.h"
#include "AliITSReconstructor.h"
#include "AliITStrackV2.h"
//____________________________________________________________________________
AliITStrackV2::AliITStrackV2() : AliKalmanTrack(),
+ fCheckInvariant(kTRUE),
fdEdx(0),
fESDtrack(0)
{
for(Int_t i=0; i<2*AliITSgeomTGeo::kNLayers; i++) {fIndex[i]=-1; fModule[i]=-1;}
+ for(Int_t i=0; i<AliITSgeomTGeo::kNLayers; i++) {fSharedWeight[i]=0;}
for(Int_t i=0; i<4; i++) fdEdxSample[i]=0;
}
//____________________________________________________________________________
-AliITStrackV2::AliITStrackV2(AliESDtrack& t,Bool_t c) throw (const Char_t *) :
+AliITStrackV2::AliITStrackV2(AliESDtrack& t,Bool_t c):
AliKalmanTrack(),
+ fCheckInvariant(kTRUE),
fdEdx(t.GetITSsignal()),
fESDtrack(&t)
{
const AliExternalTrackParam *par=&t;
if (c) {
par=t.GetConstrainedParam();
- if (!par) throw "AliITStrackV2: conversion failed !\n";
+ if (!par) AliError("AliITStrackV2: conversion failed !\n");
}
Set(par->GetX(),par->GetAlpha(),par->GetParameter(),par->GetCovariance());
- //if (!Invariant()) throw "AliITStrackV2: conversion failed !\n";
-
SetLabel(t.GetLabel());
SetMass(t.GetMass());
SetNumberOfClusters(t.GetITSclusters(fIndex));
SetIntegratedLength(t.GetIntegratedLength());
}
+ for(Int_t i=0; i<AliITSgeomTGeo::kNLayers; i++) {fSharedWeight[i]=0;}
for(Int_t i=0; i<4; i++) fdEdxSample[i]=0;
}
// Reset the array of attached clusters.
//------------------------------------------------------------------
for (Int_t i=0; i<2*AliITSgeomTGeo::kNLayers; i++) fIndex[i]=-1;
+ for (Int_t i=0; i<AliITSgeomTGeo::kNLayers; i++) {fSharedWeight[i]=0;}
SetChi2(0.);
SetNumberOfClusters(0);
}
// Update track params
fESDtrack->UpdateTrackParams(this,flags);
// copy the module indices
- for(Int_t i=0;i<12;i++) {
+ Int_t i;
+ for(i=0;i<2*AliITSgeomTGeo::kNLayers;i++) {
// printf(" %d\n",GetModuleIndex(i));
fESDtrack->SetITSModuleIndex(i,GetModuleIndex(i));
}
+ // copy the map of shared clusters
+ if(flags==AliESDtrack::kITSin) {
+ UChar_t itsSharedMap=0;
+ for(i=0;i<AliITSgeomTGeo::kNLayers;i++) {
+ if(fSharedWeight[i]>0) SETBIT(itsSharedMap,i);
+
+ }
+ fESDtrack->SetITSSharedMap(itsSharedMap);
+ }
+
// copy the 4 dedx samples
Double_t sdedx[4]={0.,0.,0.,0.};
- for(Int_t i=0; i<4; i++) sdedx[i]=fdEdxSample[i];
+ for(i=0; i<4; i++) sdedx[i]=fdEdxSample[i];
fESDtrack->SetITSdEdxSamples(sdedx);
}
//____________________________________________________________________________
AliITStrackV2::AliITStrackV2(const AliITStrackV2& t) :
AliKalmanTrack(t),
+ fCheckInvariant(t.fCheckInvariant),
fdEdx(t.fdEdx),
fESDtrack(t.fESDtrack)
{
fIndex[i]=t.fIndex[i];
fModule[i]=t.fModule[i];
}
+ for (i=0; i<AliITSgeomTGeo::kNLayers; i++) {fSharedWeight[i]=t.fSharedWeight[i];}
}
//_____________________________________________________________________________
//------------------------------------------------------------------
// This function is for debugging purpose only
//------------------------------------------------------------------
+ if(!fCheckInvariant) return kTRUE;
+
Int_t n=GetNumberOfClusters();
// take into account the misalignment error
//------------------------------------------------------------------
//This function improves angular track parameters
//------------------------------------------------------------------
+ //Store the initail track parameters
+
+ Double_t x = GetX();
+ Double_t alpha = GetAlpha();
+ Double_t par[] = {GetY(),GetZ(),GetSnp(),GetTgl(),GetSigned1Pt()};
+ Double_t cov[] = {
+ GetSigmaY2(),
+ GetSigmaZY(),
+ GetSigmaZ2(),
+ GetSigmaSnpY(),
+ GetSigmaSnpZ(),
+ GetSigmaSnp2(),
+ GetSigmaTglY(),
+ GetSigmaTglZ(),
+ GetSigmaTglSnp(),
+ GetSigmaTgl2(),
+ GetSigma1PtY(),
+ GetSigma1PtZ(),
+ GetSigma1PtSnp(),
+ GetSigma1PtTgl(),
+ GetSigma1Pt2()
+ };
+
+
Double_t cs=TMath::Cos(GetAlpha()), sn=TMath::Sin(GetAlpha());
-//Double_t xv = xyz[0]*cs + xyz[1]*sn; // vertex
+ Double_t xv = xyz[0]*cs + xyz[1]*sn; // vertex
Double_t yv =-xyz[0]*sn + xyz[1]*cs; // in the
Double_t zv = xyz[2]; // local frame
- Double_t dy = Par(0) - yv, dz = Par(1) - zv;
- Double_t r2=GetX()*GetX() + dy*dy;
+ Double_t dx = x - xv, dy = par[0] - yv, dz = par[1] - zv;
+ Double_t r2=dx*dx + dy*dy;
Double_t p2=(1.+ GetTgl()*GetTgl())/(GetSigned1Pt()*GetSigned1Pt());
Double_t beta2=p2/(p2 + GetMass()*GetMass());
x0*=TMath::Sqrt((1.+ GetTgl()*GetTgl())/(1.- GetSnp()*GetSnp()));
Double_t theta2=14.1*14.1/(beta2*p2*1e6)*x0;
//Double_t theta2=1.0259e-6*14*14/28/(beta2*p2)*x0*9.36*2.33;
- Double_t cnv=GetBz()*kB2C;
+ Double_t bz=GetBz();
+ Double_t cnv=bz*kB2C;
+ Double_t curv=GetC(bz);
{
- Double_t dummy = 4/r2 - GetC()*GetC();
+ Double_t dummy = 4/r2 - curv*curv;
if (dummy < 0) return kFALSE;
- Double_t parp = 0.5*(GetC()*GetX() + dy*TMath::Sqrt(dummy));
- Double_t sigma2p = theta2*(1.- GetSnp()*GetSnp())*(1. + GetTgl()*GetTgl());
- sigma2p += Cov(0)/r2*(1.- dy*dy/r2)*(1.- dy*dy/r2);
+ Double_t parp = 0.5*(curv*dx + dy*TMath::Sqrt(dummy));
+ Double_t sigma2p = theta2*(1.-GetSnp())*(1.+GetSnp())*(1. + GetTgl()*GetTgl());
+ Double_t ovSqr2 = 1./TMath::Sqrt(r2);
+ Double_t tfact = ovSqr2*(1.-dy*ovSqr2)*(1.+dy*ovSqr2);
+ sigma2p += cov[0]*tfact*tfact;
sigma2p += ers[1]*ers[1]/r2;
- sigma2p += 0.25*Cov(14)*cnv*cnv*GetX()*GetX();
- Double_t eps2p=sigma2p/(Cov(5) + sigma2p);
- Par(0) += Cov(3)/(Cov(5) + sigma2p)*(parp - GetSnp());
- Par(2) = eps2p*GetSnp() + (1 - eps2p)*parp;
- Cov(5) *= eps2p;
- Cov(3) *= eps2p;
+ sigma2p += 0.25*cov[14]*cnv*cnv*dx*dx;
+ Double_t eps2p=sigma2p/(cov[5] + sigma2p);
+ par[0] += cov[3]/(cov[5] + sigma2p)*(parp - GetSnp());
+ par[2] = eps2p*GetSnp() + (1 - eps2p)*parp;
+ cov[5] *= eps2p;
+ cov[3] *= eps2p;
}
{
- Double_t parl=0.5*GetC()*dz/TMath::ASin(0.5*GetC()*TMath::Sqrt(r2));
+ Double_t parl=0.5*curv*dz/TMath::ASin(0.5*curv*TMath::Sqrt(r2));
Double_t sigma2l=theta2;
- sigma2l += Cov(2)/r2 + Cov(0)*dy*dy*dz*dz/(r2*r2*r2);
+ sigma2l += cov[2]/r2 + cov[0]*dy*dy*dz*dz/(r2*r2*r2);
sigma2l += ers[2]*ers[2]/r2;
- Double_t eps2l = sigma2l/(Cov(9) + sigma2l);
- Par(1) += Cov(7 )/(Cov(9) + sigma2l)*(parl - Par(3));
- Par(4) += Cov(13)/(Cov(9) + sigma2l)*(parl - Par(3));
- Par(3) = eps2l*Par(3) + (1-eps2l)*parl;
- Cov(9) *= eps2l;
- Cov(13)*= eps2l;
- Cov(7) *= eps2l;
+ Double_t eps2l = sigma2l/(cov[9] + sigma2l);
+ par[1] += cov[7 ]/(cov[9] + sigma2l)*(parl - par[3]);
+ par[4] += cov[13]/(cov[9] + sigma2l)*(parl - par[3]);
+ par[3] = eps2l*par[3] + (1-eps2l)*parl;
+ cov[9] *= eps2l;
+ cov[13]*= eps2l;
+ cov[7] *= eps2l;
}
+
+ Set(x,alpha,par,cov);
+
if (!Invariant()) return kFALSE;
return kTRUE;
return kTRUE;
}
+
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