#include "AliTPCtrack.h"
#include "AliCluster.h"
-#include "AliBarrelTrack.h"
#include "AliESDtrack.h"
ClassImp(AliTPCtrack)
//_________________________________________________________________________
AliTPCtrack::AliTPCtrack(): AliKalmanTrack()
{
+ //-------------------------------------------------
+ // default constructor
+ //-------------------------------------------------
fX = fP0 = fP1 = fP2 = fP3 = fP3 = fP4 = 0.0;
fAlpha = fdEdx = 0.0;
- fNWrong = fNRotation = fNumber = 0; // [SR, 01.04.2003]
+ fNumber = 0; // [SR, 01.04.2003]
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0;
}
//_________________________________________________________________________
+
+
+
AliTPCtrack::AliTPCtrack(UInt_t index, const Double_t xx[5],
const Double_t cc[15], Double_t xref, Double_t alpha) : AliKalmanTrack() {
//-----------------------------------------------------------------
fP0=xx[0]; fP1=xx[1]; fP2=xx[2]; fP3=xx[3]; fP4=xx[4];
+ SaveLocalConvConst();
+
fC00=cc[0];
fC10=cc[1]; fC11=cc[2];
fC20=cc[3]; fC21=cc[4]; fC22=cc[5];
fRemoval = 0;
fTrackType = 0;
fLab2 = 0;
-}
-
-//_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliKalmanTrack& t,Double_t alpha) :
-AliKalmanTrack(t) {
- //-----------------------------------------------------------------
- // Conversion AliKalmanTrack -> AliTPCtrack.
- //-----------------------------------------------------------------
- SetChi2(0.);
- SetNumberOfClusters(0);
-
- fdEdx = 0.;
- fAlpha = alpha;
- 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);
- fX=x; x=GetConvConst();
- fP0=p[0];
- fP1=p[1];
- fP3=p[3];
- fP4=p[4]/x;
- fP2=fP4*fX - p[2];
-
- //Conversion of the covariance matrix
- Double_t c[15]; t.GetExternalCovariance(c);
- c[10]/=x; c[11]/=x; c[12]/=x; c[13]/=x; c[14]/=x*x;
-
- Double_t c22=fX*fX*c[14] - 2*fX*c[12] + c[5];
- Double_t c32=fX*c[13] - c[8];
- Double_t c20=fX*c[10] - c[3], c21=fX*c[11] - c[4], c42=fX*c[14] - c[12];
-
- fC00=c[0 ];
- fC10=c[1 ]; fC11=c[2 ];
- fC20=c20; fC21=c21; fC22=c22;
- fC30=c[6 ]; fC31=c[7 ]; fC32=c32; fC33=c[9 ];
- fC40=c[10]; fC41=c[11]; fC42=c42; fC43=c[13]; fC44=c[14];
- //
- //MI
- fSdEdx = 0;
- fNFoundable = 0;
- fBConstrain = 0;
- fLastPoint = 0;
- fFirstPoint = 0;
- fRemoval = 0;
- fTrackType = 0;
- fLab2 = 0;
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0;
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=0;
}
//_____________________________________________________________________________
SetNumberOfClusters(t.GetTPCclusters(fIndex));
SetLabel(t.GetLabel());
SetMass(t.GetMass());
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=t.GetKinkIndex(i);
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=t.GetV0Index(i);
fdEdx = t.GetTPCsignal();
fAlpha = t.GetAlpha();
//Conversion of the track parameters
Double_t x,p[5]; t.GetExternalParameters(x,p);
- fX=x; x=GetConvConst();
+ Double_t c[15]; t.GetExternalCovariance(c);
+
+ fX=x;
fP0=p[0];
- fP1=p[1];
- fP3=p[3];
+ fP1=p[1]; SaveLocalConvConst();
+ fP3=p[3]; x=GetLocalConvConst();
fP4=p[4]/x;
fP2=fP4*fX - p[2];
//Conversion of the covariance matrix
- Double_t c[15]; t.GetExternalCovariance(c);
c[10]/=x; c[11]/=x; c[12]/=x; c[13]/=x; c[14]/=x*x;
Double_t c22=fX*fX*c[14] - 2*fX*c[12] + c[5];
fRemoval = t.fRemoval ;
fTrackType = t.fTrackType;
fLab2 = t.fLab2;
-
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=t.fKinkIndexes[i];
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=t.fV0Indexes[i];
}
-//_____________________________________________________________________________
-
-void AliTPCtrack::GetBarrelTrack(AliBarrelTrack *track) {
- //
- // Create a Barrel Track out of this track
- // Current track is propagated to the reference plane
- // by the tracker
- //
- // [SR, 01.04.2003]
-
- if (!track) return;
- Double_t xr, vec[5], cov[15];
-
- track->SetLabel(GetLabel());
- track->SetX(fX, fAlpha);
- track->SetNClusters(GetNumberOfClusters(), GetChi2());
- Double_t times[10];
- GetIntegratedTimes(times);
- track->SetTime(times, GetIntegratedLength());
-
- track->SetMass(GetMass());
- track->SetdEdX(GetdEdx());
- track->SetNWrongClusters(fNWrong);
- track->SetNRotate(fNRotation);
-
- GetExternalParameters(xr, vec);
- track->SetStateVector(vec);
-
- GetExternalCovariance(cov);
- track->SetCovarianceMatrix(cov);
-
-}
//_____________________________________________________________________________
Int_t AliTPCtrack::Compare(const TObject *o) const {
//-----------------------------------------------------------------
//_____________________________________________________________________________
void AliTPCtrack::GetExternalCovariance(Double_t cc[15]) const {
- //-------------------------------------------------------------------------
+ //-------------------------------------------------------------------------
// This function returns an external representation of the covriance matrix.
// (See comments in AliTPCtrack.h about external track representation)
//-------------------------------------------------------------------------
- Double_t a=GetConvConst();
+ Double_t a=GetLocalConvConst();
Double_t c22=fX*fX*fC44-2*fX*fC42+fC22;
Double_t c32=fX*fC43-fC32;
//if (n>4) cerr<<n<<" AliTPCtrack warning: Propagation failed !\n";
return 0;
}
-
+ Double_t lcc=GetLocalConvConst();
+
// old position for time [SR, GSI 17.02.2003]
Double_t oldX = fX;
Double_t oldY = fP0;
fX=x2;
- //Multiple scattering******************
+ //Change of the magnetic field *************
+ SaveLocalConvConst();
+ cc=fP4;
+ fP4*=lcc/GetLocalConvConst();
+ fP2+=fX*(fP4-cc);
+
+ //Multiple scattering ******************
Double_t d=sqrt((x1-fX)*(x1-fX)+(y1-fP0)*(y1-fP0)+(z1-fP1)*(z1-fP1));
Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
Double_t beta2=p2/(p2 + GetMass()*GetMass());
fC43 += dc43;
fC44 += dc44;
*/
- //Energy losses************************
+ //Energy losses ************************
Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d*rho;
if (x1 < x2) dE=-dE;
cc=fP4;
//-----------------------------------------------------------------
// This function associates a cluster with this track.
//-----------------------------------------------------------------
-
- // update the number of wrong SR[20.03.2003]
- Int_t absLabel = TMath::Abs(GetLabel());
- if ( (c->GetLabel(0) != absLabel) &&
- (c->GetLabel(0) != absLabel) &&
- (c->GetLabel(0) != absLabel)) fNWrong++;
- //
-
Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
r00+=fC00; r01+=fC10; r11+=fC11;
Double_t det=r00*r11 - r01*r01;
//-----------------------------------------------------------------
// This function rotates this track.
//-----------------------------------------------------------------
-
- if (alpha != 0) fNRotation++; // [SR, 01.04.2003]
-
fAlpha += alpha;
if (fAlpha<-TMath::Pi()) fAlpha += 2*TMath::Pi();
if (fAlpha>=TMath::Pi()) fAlpha -= 2*TMath::Pi();
delta -= TMath::Abs(r);
return delta;
}
+
+//
+//
+
+void AliTPCtrack::UpdatePoints()
+{
+ //--------------------------------------------------
+ //calculates first ,amx dens and last points
+ //--------------------------------------------------
+ Float_t density[160];
+ for (Int_t i=0;i<160;i++) density[i]=-1.;
+ fPoints[0]= 160;
+ fPoints[1] = -1;
+ //
+ Int_t ngood=0;
+ Int_t undeff=0;
+ Int_t nall =0;
+ Int_t range=20;
+ for (Int_t i=0;i<160;i++){
+ Int_t last = i-range;
+ if (nall<range) nall++;
+ if (last>=0){
+ if (fIndex[last]>0&& (fIndex[last]&0x8000)==0) ngood--;
+ if (fIndex[last]==-1) undeff--;
+ }
+ if (fIndex[i]>0&& (fIndex[i]&0x8000)==0) ngood++;
+ if (fIndex[i]==-1) undeff++;
+ if (nall==range &&undeff<range/2) density[i-range/2] = Float_t(ngood)/Float_t(nall-undeff);
+ }
+ Float_t maxdens=0;
+ Int_t indexmax =0;
+ for (Int_t i=0;i<160;i++){
+ if (density[i]<0) continue;
+ if (density[i]>maxdens){
+ maxdens=density[i];
+ indexmax=i;
+ }
+ }
+ //
+ //max dens point
+ fPoints[3] = maxdens;
+ fPoints[1] = indexmax;
+ //
+ // last point
+ for (Int_t i=indexmax;i<160;i++){
+ if (density[i]<0) continue;
+ if (density[i]<maxdens/2.) {
+ break;
+ }
+ fPoints[2]=i;
+ }
+ //
+ // first point
+ for (Int_t i=indexmax;i>0;i--){
+ if (density[i]<0) continue;
+ if (density[i]<maxdens/2.) {
+ break;
+ }
+ fPoints[0]=i;
+ }
+ //
+}
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