#ifndef ALITRDTRACK_H #define ALITRDTRACK_H /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * See cxx source for full Copyright notice */ #include #include #include "AliTRDgeometry.h" #include "AliESDtrack.h" #include "TVector2.h" class AliTRDcluster; class AliTPCtrack; class AliESDtrack; class AliTrackReference; const unsigned kMAX_CLUSTERS_PER_TRACK=210; class AliTRDtracklet :public TObject{ friend class AliTRDtrack; public: AliTRDtracklet(); void Set(Float_t x, Float_t y, Float_t z, Float_t alpha, Float_t error2){fX=x; fY=y; fZ=z; fAlpha=alpha; fSigma2= error2;} void SetP0(Float_t p0){fP0=p0;} void SetP1(Float_t p1){fP1=p1;} void SetN(Int_t n){fNFound=n;} void SetNCross(Int_t nc){fNCross=nc;} void SetPlane(Int_t plane){fPlane=plane;} void SetSigma2(Float_t sigma2){fExpectedSigma2=sigma2;} void SetChi2(Float_t chi2){fChi2=chi2;} void SetTilt(Float_t tilt){fTilt=tilt;} void SetMaxPos(Short_t pos, Short_t pos4, Short_t pos5){fMaxPos = pos; fMaxPos4 = pos4; fMaxPos5 = pos5;} Float_t GetX() const { return fX;} Float_t GetY() const { return fY;} Float_t GetZ() const {return fZ;} Float_t GetAlpha() const { return fAlpha;} Float_t GetTrackletSigma2() const { return fSigma2;} // Float_t GetP0() const {return fP0;} Float_t GetP1() const {return fP1;} Int_t GetN() const {return fNFound;} Int_t GetNCross() const {return fNCross;} Int_t GetPlane() const {return fPlane;} Float_t GetClusterSigma2() const {return fExpectedSigma2;} Float_t GetChi2() const {return fChi2;} Float_t GetTilt() const {return fTilt;} protected: Float_t fY; // y position Float_t fZ; // z position Float_t fX; // x position Float_t fAlpha; // rotation angle Float_t fSigma2; // expected error of tracklet position Float_t fP0; // offset in y Float_t fP1; // offset in tangent Int_t fNFound; // number of found clusters Int_t fNCross; // number of crosses Int_t fPlane; // plane number Float_t fExpectedSigma2; // expected sigma of residual distribution of clusters Float_t fChi2; // chi2 of the tracklet Float_t fTilt; // tilt factor Short_t fMaxPos; // time bin with max charge Short_t fMaxPos4; // time bin with max charge Short_t fMaxPos5; // time bin with max charge ClassDef(AliTRDtracklet,2) }; class AliTRDtrack : public AliKalmanTrack { // Represents reconstructed TRD track friend class AliTRDtracker; public: AliTRDtrack():AliKalmanTrack(){fBackupTrack=0;} AliTRDtrack(const AliTRDcluster *c, UInt_t index, const Double_t xx[5], const Double_t cc[15], Double_t xr, Double_t alpha); AliTRDtrack(const AliTRDtrack& t); AliTRDtrack(const AliKalmanTrack& t, Double_t alpha); AliTRDtrack(const AliESDtrack& t); //static AliTRDtrack * MakeTrack(const AliTrackReference *ref, Double_t mass); ~AliTRDtrack(); Int_t Compare(const TObject *o) const; void CookdEdx(Double_t low=0.05, Double_t up=0.7); Float_t StatusForTOF(); Double_t GetAlpha() const {return fAlpha;} Int_t GetSector() const { //if (fabs(fAlpha) < AliTRDgeometry::GetAlpha()/2) return 0; return Int_t(TVector2::Phi_0_2pi(fAlpha)/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;} Double_t GetC() const {return fC;} Int_t GetClusterIndex(Int_t i) const {return fIndex[i];} Float_t GetClusterdQdl(Int_t i) const {return fdQdl[i];} void GetCovariance(Double_t cov[15]) const; Double_t GetdEdx() const {return fdEdx;} Double_t GetPIDsignal() const {return GetdEdx();} Float_t GetPIDsignals(Int_t i) const {return fdEdxPlane[i];} Int_t GetPIDTimBin(Int_t i) const {return fTimBinPlane[i];} Double_t GetEta() const {return fE;} void GetExternalCovariance(Double_t cov[15]) const ; void GetExternalParameters(Double_t& xr, Double_t x[5]) const ; Double_t GetLikelihoodElectron() const { return fLhElectron; }; Double_t Get1Pt() const { return (TMath::Sign(1e-9,fC) + fC)*GetLocalConvConst(); } Double_t GetP() const { return TMath::Abs(GetPt())*sqrt(1.+GetTgl()*GetTgl()); } Double_t GetPredictedChi2(const AliTRDcluster*, Double_t h01) const ; Double_t GetPt() const {return 1./Get1Pt();} void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const ; void GetGlobalXYZ(Double_t &x, Double_t &y, Double_t &z) const ; Int_t GetSeedLabel() const { return fSeedLab; } Double_t GetSigmaC2() const {return fCcc;} Double_t GetSigmaTgl2() const {return fCtt;} Double_t GetSigmaY2() const {return fCyy;} Double_t GetSigmaZ2() const {return fCzz;} Double_t GetSnp() const {return fX*fC - fE;} Double_t GetTgl() const {return fT;} Double_t GetX() const {return fX;} Double_t GetY() const {return fY;} Double_t GetZ() const {return fZ;} UInt_t * GetBackupIndexes() {return fIndexBackup;} UInt_t * GetIndexes() {return fIndex;} Double_t GetYat(Double_t xk) const { //----------------------------------------------------------------- // This function calculates the Y-coordinate of a track at the plane x=xk. // Needed for matching with the TOF (I.Belikov) //----------------------------------------------------------------- Double_t c1=fC*fX - fE, r1=TMath::Sqrt(1.- c1*c1); Double_t c2=fC*xk - fE, r2=TMath::Sqrt(1.- c2*c2); return fY + (xk-fX)*(c1+c2)/(r1+r2); } Int_t GetProlongation(Double_t xk, Double_t &y, Double_t &z); void SetStop(Bool_t stop) {fStopped=stop;} Bool_t GetStop() const {return fStopped;} Int_t PropagateTo(Double_t xr, Double_t x0=8.72, Double_t rho=5.86e-3); Int_t PropagateToX(Double_t xr, Double_t step); Int_t PropagateToR(Double_t xr, Double_t step); void ResetCovariance(); void ResetCovariance(Float_t mult); void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); } Int_t Rotate(Double_t angle, Bool_t absolute=kFALSE); void SetdEdx(Float_t dedx) {fdEdx=dedx;} void SetPIDsignals(Float_t dedx, Int_t i) {fdEdxPlane[i]=dedx;} void SetPIDTimBin(Int_t timbin, Int_t i) {fTimBinPlane[i]=timbin;} void SetLikelihoodElectron(Float_t l) { fLhElectron = l; }; void SetSampledEdx(Float_t q, Int_t i) { Double_t s=GetSnp(), t=GetTgl(); q*= TMath::Sqrt((1-s*s)/(1+t*t)); fdQdl[i]=q; } void SetSampledEdx(Float_t q) { Double_t s=GetSnp(), t=GetTgl(); q*= TMath::Sqrt((1-s*s)/(1+t*t)); fdQdl[fNdedx]=q; fNdedx++; } void SetSeedLabel(Int_t lab) { fSeedLab=lab; } Int_t Update(const AliTRDcluster* c, Double_t chi2, UInt_t i, Double_t h01); Int_t UpdateMI(const AliTRDcluster* c, Double_t chi2, UInt_t i, Double_t h01, Int_t plane); Int_t UpdateMI(const AliTRDtracklet & tracklet); // void AddNWrong() {fNWrong++;} Int_t GetNWrong() const {return fNWrong;} Int_t GetNRotate() const {return fNRotate;} Int_t GetNCross() const {return fNCross;} void IncCross() {fNCross++; if (fBackupTrack) fBackupTrack->IncCross();} AliTRDtrack * GetBackupTrack(){return fBackupTrack;} void MakeBackupTrack(); // protected: void GetXYZ(Float_t r[3]) const; Double_t GetPredictedChi2(const AliCluster*/*c*/) const {return 0.;} Int_t Update(const AliCluster*/*c*/, Double_t /*chi2*/, UInt_t /*i*/) { return 0; } Int_t fSeedLab; // track label taken from seeding Float_t fdEdx; // dE/dx Float_t fdEdxT; // dE/dx - truncated mean Float_t fDE; // integrated delta energy Float_t fdEdxPlane[kNPlane]; // dE/dx from all 6 planes Int_t fTimBinPlane[kNPlane]; // time bin of Max cluster from all 6 planes Double_t fAlpha; // rotation angle Double_t fX; // running local X-coordinate of the track (time bin) Bool_t fStopped; // track stop indication Double_t fY; // Y-coordinate of the track Double_t fZ; // Z-coordinate of the track Double_t fE; // C*x0 Double_t fT; // tangent of the track momentum dip angle Double_t fC; // track curvature Double_t fCyy; // covariance Double_t fCzy, fCzz; // matrix Double_t fCey, fCez, fCee; // of the Double_t fCty, fCtz, fCte, fCtt; // track Double_t fCcy, fCcz, fCce, fCct, fCcc; // parameters UInt_t fIndex[kMAX_CLUSTERS_PER_TRACK]; // global indexes of clusters UInt_t fIndexBackup[kMAX_CLUSTERS_PER_TRACK]; //backup indexes of clusters - used in iterations Float_t fdQdl[kMAX_CLUSTERS_PER_TRACK]; // cluster amplitudes corrected // for track angles Float_t fLhElectron; // Likelihood to be an electron Int_t fNWrong; // number of wrong clusters Int_t fNRotate; // number of rotation Int_t fNCross; // number of the cross materials Int_t fNExpected; //expected number of cluster Int_t fNLast; //number of clusters in last 2 layers Int_t fNExpectedLast; //number of expected clusters on last 2 layers Int_t fNdedx; //number of clusters for dEdx measurment Float_t fChi2Last; //chi2 in the last 2 layers AliTRDtracklet fTracklets[6]; //tracklets Float_t fBudget[3]; // integrated material budget AliTRDtrack * fBackupTrack; //! backup track ClassDef(AliTRDtrack,3) // TRD reconstructed tracks }; inline void AliTRDtrack::GetXYZ(Float_t r[3]) const { //--------------------------------------------------------------------- // Returns the position of the track in the global coord. system //--------------------------------------------------------------------- Double_t cs=TMath::Cos(fAlpha), sn=TMath::Sin(fAlpha); r[0]=fX*cs - fY*sn; r[1]=fX*sn + fY*cs; r[2]=fZ; } #endif