/* $Id$ */
//-------------------------------------------------------------------------
-// AOD track implementation of AliVParticle
+// AOD track implementation of AliVTrack
// Author: Markus Oldenburg, CERN
// Markus.Oldenburg@cern.ch
//-------------------------------------------------------------------------
//______________________________________________________________________________
AliAODTrack::AliAODTrack() :
- AliVParticle(),
+ AliVTrack(),
fChi2perNDF(-999.),
fChi2MatchTrigger(0.),
fFlags(0),
AODTrk_t ttype,
UInt_t selectInfo,
Float_t chi2perNDF) :
- AliVParticle(),
+ AliVTrack(),
fChi2perNDF(chi2perNDF),
fChi2MatchTrigger(0.),
fFlags(0),
AODTrk_t ttype,
UInt_t selectInfo,
Float_t chi2perNDF) :
- AliVParticle(),
+ AliVTrack(),
fChi2perNDF(chi2perNDF),
fChi2MatchTrigger(0.),
fFlags(0),
//______________________________________________________________________________
AliAODTrack::AliAODTrack(const AliAODTrack& trk) :
- AliVParticle(trk),
+ AliVTrack(trk),
fChi2perNDF(trk.fChi2perNDF),
fChi2MatchTrigger(trk.fChi2MatchTrigger),
fFlags(trk.fFlags),
// Assignment operator
if(this!=&trk) {
- AliVParticle::operator=(trk);
+ AliVTrack::operator=(trk);
trk.GetP(fMomentum);
trk.GetPosition(fPosition);
}
}
-Bool_t AliAODTrack::PropagateTo(Double_t xk, Double_t b) {
- //----------------------------------------------------------------
- // Propagate this track to the plane X=xk (cm) in the field "b" (kG)
- // This is in local coordinates!!!
- //----------------------------------------------------------------
-
- Double_t alpha = 0.;
- Double_t localP[3] = {Px(), Py(), Pz()}; // set global (sic!) p
- Global2LocalMomentum(localP, Charge(), alpha); // convert global to local momentum
-
- AliAODVertex *origin = (AliAODVertex*)fProdVertex.GetObject();
- Double_t localX[3] = {origin->GetX(), origin->GetY(), origin->GetZ()}; // set global (sic!) location of first track point
- Global2LocalPosition(localX, alpha); // convert global to local position
-
- Double_t &fX = localX[0];
-
- Double_t dx=xk-fX;
- if (TMath::Abs(dx)<=kAlmost0) return kTRUE;
-
- Double_t crv=localP[0]*b*kB2C;
- if (TMath::Abs(b) < kAlmost0Field) crv=0.;
-
- Double_t f1=localP[1], f2=f1 + crv*dx;
- if (TMath::Abs(f1) >= kAlmost1) return kFALSE;
- if (TMath::Abs(f2) >= kAlmost1) return kFALSE;
-
- Double_t &fP0=localX[1], &fP1=localX[2], &fP2=localP[0], &fP3=localP[1], &fP4=localP[2];
- /* covariance matrix to be fixed!
- Double_t
- &fC00=fC[0],
- &fC10=fC[1], &fC11=fC[2],
- &fC20=fC[3], &fC21=fC[4], &fC22=fC[5],
- &fC30=fC[6], &fC31=fC[7], &fC32=fC[8], &fC33=fC[9],
- &fC40=fC[10], &fC41=fC[11], &fC42=fC[12], &fC43=fC[13], &fC44=fC[14];
- */
- Double_t r1=TMath::Sqrt(1.- f1*f1), r2=TMath::Sqrt(1.- f2*f2);
-
- fX=xk;
- fP0 += dx*(f1+f2)/(r1+r2);
- fP1 += dx*(r2 + f2*(f1+f2)/(r1+r2))*fP3;
- fP2 += dx*crv;
-
- //f = F - 1
-
- //Double_t f02= dx/(r1*r1*r1);
- Double_t cc=crv/fP4;
- Double_t f04=0.5*dx*dx/(r1*r1*r1); f04*=cc;
- //Double_t f12= dx*fP3*f1/(r1*r1*r1);
- Double_t f14=0.5*dx*dx*fP3*f1/(r1*r1*r1); f14*=cc;
- //Double_t f13= dx/r1;
- Double_t f24= dx; f24*=cc;
-
- /* covariance matrix to be fixed!
- //b = C*ft
- Double_t b00=f02*fC20 + f04*fC40, b01=f12*fC20 + f14*fC40 + f13*fC30;
- Double_t b02=f24*fC40;
- Double_t b10=f02*fC21 + f04*fC41, b11=f12*fC21 + f14*fC41 + f13*fC31;
- Double_t b12=f24*fC41;
- Double_t b20=f02*fC22 + f04*fC42, b21=f12*fC22 + f14*fC42 + f13*fC32;
- Double_t b22=f24*fC42;
- Double_t b40=f02*fC42 + f04*fC44, b41=f12*fC42 + f14*fC44 + f13*fC43;
- Double_t b42=f24*fC44;
- Double_t b30=f02*fC32 + f04*fC43, b31=f12*fC32 + f14*fC43 + f13*fC33;
- Double_t b32=f24*fC43;
-
- //a = f*b = f*C*ft
- Double_t a00=f02*b20+f04*b40,a01=f02*b21+f04*b41,a02=f02*b22+f04*b42;
- Double_t a11=f12*b21+f14*b41+f13*b31,a12=f12*b22+f14*b42+f13*b32;
- Double_t a22=f24*b42;
-
- //F*C*Ft = C + (b + bt + a)
- fC00 += b00 + b00 + a00;
- fC10 += b10 + b01 + a01;
- fC20 += b20 + b02 + a02;
- fC30 += b30;
- fC40 += b40;
- fC11 += b11 + b11 + a11;
- fC21 += b21 + b12 + a12;
- fC31 += b31;
- fC41 += b41;
- fC22 += b22 + b22 + a22;
- fC32 += b32;
- fC42 += b42;
- */
-
- Local2GlobalMomentum(localP, alpha); // convert local to global momentum
- SetP(localP);
-
- return kTRUE;
-}
-