#include <TMath.h>
#include "AliCluster.h"
-#include "AliTPCtrack.h"
+#include "AliESDtrack.h"
#include "AliITStrackV2.h"
ClassImp(AliITStrackV2)
fC41(0),
fC42(0),
fC43(0),
- fC44(0)
- {
- for(Int_t i=0; i<kMaxLayer; i++) fIndex[i]=0;
- for(Int_t i=0; i<4; i++) fdEdxSample[i]=0;
+ fC44(0),
+ fESDtrack(0)
+{
+ for(Int_t i=0; i<kMaxLayer; i++) fIndex[i]=0;
+ for(Int_t i=0; i<4; i++) fdEdxSample[i]=0;
}
+
+
//____________________________________________________________________________
-AliITStrackV2::AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *) :
-AliKalmanTrack(t) {
+AliITStrackV2::AliITStrackV2(AliESDtrack& t,Bool_t c) throw (const Char_t *) :
+AliKalmanTrack() {
//------------------------------------------------------------------
- //Conversion TPC track -> ITS track
+ // Conversion ESD track -> ITS track.
+ // If c==kTRUE, create the ITS track out of the constrained params.
//------------------------------------------------------------------
- SetChi2(0.);
- SetNumberOfClusters(0);
-
- fdEdx = t.GetdEdx();
+ SetNumberOfClusters(t.GetITSclusters(fIndex));
+ SetLabel(t.GetLabel());
SetMass(t.GetMass());
+ //
+ //
+ fdEdx=t.GetITSsignal();
fAlpha = t.GetAlpha();
if (fAlpha < -TMath::Pi()) fAlpha += 2*TMath::Pi();
else if (fAlpha >= TMath::Pi()) fAlpha -= 2*TMath::Pi();
//Conversion of the track parameters
- Double_t x,p[5]; t.GetExternalParameters(x,p);
+ Double_t x,p[5];
+ if (c) t.GetConstrainedExternalParameters(x,p);
+ else t.GetExternalParameters(x,p);
fX=x; x=GetConvConst();
fP0=p[0];
fP1=p[1];
fP4=p[4]/x;
//Conversion of the covariance matrix
- Double_t c[15]; t.GetExternalCovariance(c);
-
- fC00=c[0 ];
- fC10=c[1 ]; fC11=c[2 ];
- fC20=c[3 ]; fC21=c[4 ]; fC22=c[5 ];
- fC30=c[6 ]; fC31=c[7 ]; fC32=c[8 ]; fC33=c[9 ];
- fC40=c[10]/x; fC41=c[11]/x; fC42=c[12]/x; fC43=c[13]/x; fC44=c[14]/x/x;
+ Double_t cv[15];
+ if (c) t.GetConstrainedExternalCovariance(cv);
+ else t.GetExternalCovariance(cv);
+ fC00=cv[0 ];
+ fC10=cv[1 ]; fC11=cv[2 ];
+ fC20=cv[3 ]; fC21=cv[4 ]; fC22=cv[5 ];
+ fC30=cv[6 ]; fC31=cv[7 ]; fC32=cv[8 ]; fC33=cv[9 ];
+ fC40=cv[10]/x; fC41=cv[11]/x; fC42=cv[12]/x; fC43=cv[13]/x; fC44=cv[14]/x/x;
+
+ if (t.GetStatus()&AliESDtrack::kTIME) {
+ StartTimeIntegral();
+ Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
+ SetIntegratedLength(t.GetIntegratedLength());
+ }
+ fESDtrack=&t;
if (!Invariant()) throw "AliITStrackV2: conversion failed !\n";
+}
+void AliITStrackV2::UpdateESDtrack(ULong_t flags) const {
+ fESDtrack->UpdateTrackParams(this,flags);
+}
+void AliITStrackV2::SetConstrainedESDtrack(Double_t chi2) const {
+ fESDtrack->SetConstrainedTrackParams(this,chi2);
}
//____________________________________________________________________________
Int_t n=GetNumberOfClusters();
for (Int_t i=0; i<n; i++) {
- fIndex[i]=t.fIndex[i];
- if (i<4) fdEdxSample[i]=t.fdEdxSample[i];
+ fIndex[i]=t.fIndex[i];
+ if (i<4) fdEdxSample[i]=t.fdEdxSample[i];
}
+ fESDtrack=t.fESDtrack;
}
//_____________________________________________________________________________
//-----------------------------------------------------------------
Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
r00+=fC00; r01+=fC10; r11+=fC11;
-
+ //
Double_t det=r00*r11 - r01*r01;
if (TMath::Abs(det) < 1.e-30) {
Int_t n=GetNumberOfClusters();
//------------------------------------------------------------------
//This function corrects the track parameters for crossed material
//------------------------------------------------------------------
- Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
+ Double_t p2=(1.+ fP3*fP3)/(Get1Pt()*Get1Pt());
Double_t beta2=p2/(p2 + GetMass()*GetMass());
d*=TMath::Sqrt((1.+ fP3*fP3)/(1.- fP2*fP2));
if (x0!=0.) {
d*=x0;
Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d;
- fP4*=(1.- sqrt(p2+GetMass()*GetMass())/p2*dE);
+ if (beta2/(1-beta2)>3.5*3.5)
+ dE=0.153e-3/beta2*(log(3.5*5940)+0.5*log(beta2/(1-beta2)) - beta2)*d;
+
+ fP4*=(1.- TMath::Sqrt(p2+GetMass()*GetMass())/p2*dE);
}
if (!Invariant()) return 0;
if (!CorrectForMaterial(d,x0)) return 0;
// Integrated Time [SR, GSI, 17.02.2003]
- if (IsStartedTimeIntegral()) {
+ if (IsStartedTimeIntegral() && fX>oldX) {
Double_t l2 = (fX-oldX)*(fX-oldX)+(fP0-oldY)*(fP0-oldY)+
(fP1-oldZ)*(fP1-oldZ);
AddTimeStep(TMath::Sqrt(l2));
Double_t det=r00*r11 - r01*r01;
Double_t tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
+
Double_t k00=fC00*r00+fC10*r01, k01=fC00*r01+fC10*r11;
Double_t k10=fC10*r00+fC11*r01, k11=fC10*r01+fC11*r11;
Double_t k20=fC20*r00+fC21*r01, k21=fC20*r01+fC21*r11;
return 0;
}
+ if (chi2<0) return 1;
+
Int_t n=GetNumberOfClusters();
fIndex[n]=index;
SetNumberOfClusters(n+1);
fP0= -x*sa + p0*ca;
fP2= sf*ca - cf*sa;
- TMatrixD C(5,5);
+ static TMatrixD C(5,5);
C(0,0)=c00;
C(1,0)=c10; C(1,1)=c11;
C(2,0)=c20; C(2,1)=c21; C(2,2)=c22;
C(0,3)=C(3,0); C(1,3)=C(3,1); C(2,3)=C(3,2);
C(0,4)=C(4,0); C(1,4)=C(4,1); C(2,4)=C(4,2); C(3,4)=C(4,3);
- TMatrixD F(6,5);
+
+ static TMatrixD F(6,5);
F(0,0)=sa;
F(1,0)=ca;
F(2,1)=F(4,3)=F(5,4)=1;
F(3,2)=ca + sf/cf*sa;
- TMatrixD tmp(C,TMatrixD::kMult,TMatrixD(TMatrixD::kTransposed, F));
- T=new TMatrixD(F,TMatrixD::kMult,tmp);
+ //TMatrixD tmp(C,TMatrixD::kMult,TMatrixD(TMatrixD::kTransposed, F));
+
+ static TMatrixD Ft(5,6);
+ Ft(0,0)=sa;
+ Ft(0,1)=ca;
+ Ft(1,2)=Ft(3,4)=Ft(4,5)=1;
+ Ft(2,3)=ca + sf/cf*sa;
+
+ TMatrixD tmp(C,TMatrixD::kMult,Ft);
+ T=new TMatrixD(F,TMatrixD::kMult,tmp);
}
// **** translation ******************
fP1 += dx*(f1+f2)/(f1*r2 + f2*r1)*fP3;
fP2 += dx*fP4;
- TMatrixD F(5,6);
+ static TMatrixD F(5,6);
F(0,1)=F(1,2)=F(2,3)=F(3,4)=F(4,5)=1;
F(0,3)=dx/(r1+r2)*(2+(f1+f2)*(f2/r2+f1/r1)/(r1+r2));
F(0,5)=dx*dx/(r1+r2)*(1+(f1+f2)*f2/(r1+r2));
return a/(1 + TMath::Sqrt(sn*sn + cs*cs));
}
+Double_t AliITStrackV2::GetZat(Double_t x) const {
+ //------------------------------------------------------------------
+ // This function calculates the z at given x point - in current coordinate system
+ //------------------------------------------------------------------
+ Double_t x1=fX, x2=x, dx=x2-x1;
+ //
+ Double_t f1=fP2, f2=f1 + fP4*dx;
+ if (TMath::Abs(f2) >= 0.9999) {
+ return 10000000;
+ }
+ Double_t r1=sqrt(1.- f1*f1), r2=sqrt(1.- f2*f2);
+ Double_t z = fP1 + dx*(f1+f2)/(f1*r2 + f2*r1)*fP3;
+ return z;
+}
+
+
+
+
Int_t AliITStrackV2::Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]) {
//------------------------------------------------------------------
//This function improves angular track parameters
return 1;
}
-/*
-Int_t AliITStrackV2::Improve(Double_t x0,Double_t yv,Double_t zv) {
- //------------------------------------------------------------------
- //This function improves angular track parameters
- //------------------------------------------------------------------
- Double_t dy=fP0-yv, dz=fP1-zv;
- Double_t r2=fX*fX+dy*dy;
- Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
- 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 par=0.5*(fP4*fX + dy*TMath::Sqrt(4/r2-fP4*fP4));
- Double_t sigma2 = theta2*(1.- GetSnp()*GetSnp())*(1. + GetTgl()*GetTgl());
- sigma2 += fC00/r2*(1.- dy*dy/r2)*(1.- dy*dy/r2);
- sigma2 += kSigmaYV*kSigmaYV/r2;
- sigma2 += 0.25*fC44*fX*fX;
- Double_t eps2=sigma2/(fC22+sigma2), eps=TMath::Sqrt(eps2);
- if (10*r2*fC44<fC22) {
- fP2 = eps2*fP2 + (1-eps2)*par;
- fC22*=eps2; fC21*=eps; fC20*=eps; fC32*=eps; fC42*=eps;
- }
-
- par=0.5*fP4*dz/TMath::ASin(0.5*fP4*TMath::Sqrt(r2));
- sigma2=theta2;
- sigma2 += fC11/r2+fC00*dy*dy*dz*dz/(r2*r2*r2);
- sigma2 += kSigmaZV*kSigmaZV/r2;
- eps2=sigma2/(fC33+sigma2); eps=TMath::Sqrt(eps2);
- Double_t tgl=fP3;
- fP3 = eps2*fP3 + (1-eps2)*par;
- fC33*=eps2; fC32*=eps; fC31*=eps; fC30*=eps; fC43*=eps;
-
- eps=TMath::Sqrt((1+fP3*fP3)/(1+tgl*tgl));
- fP4*=eps;
- fC44*=eps*eps; fC43*=eps;fC42*=eps; fC41*=eps; fC40*=eps;
-
- if (!Invariant()) return 0;
- return 1;
-}
-*/
void AliITStrackV2::ResetCovariance() {
//------------------------------------------------------------------
//This function makes a track forget its history :)
// This function calculates dE/dX within the "low" and "up" cuts.
// Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//-----------------------------------------------------------------
- Int_t i;
- Int_t nc=4;
// The clusters order is: SSD-2, SSD-1, SDD-2, SDD-1, SPD-2, SPD-1
- // Take only SSD and SDD
+
+ Int_t i;
+ Int_t nc=0;
+ for (i=0; i<GetNumberOfClusters(); i++) {
+ Int_t idx=GetClusterIndex(i);
+ idx=(idx&0xf0000000)>>28;
+ if (idx>1) nc++; // Take only SSD and SDD
+ }
Int_t swap;//stupid sorting
do {
// nu=2
Float_t dedx=0;
for (i=nl; i<nu; i++) dedx += fdEdxSample[i];
- dedx /= (nu-nl);
+ if (nu-nl>0) dedx /= (nu-nl);
SetdEdx(dedx);
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff