#ifndef ALITPCTRACK_H #define ALITPCTRACK_H /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * See cxx source for full Copyright notice */ /* $Id$ */ //------------------------------------------------------- // TPC Track Class // // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch // // December 18, 2000 // Internal view of the TPC track parametrisation as well as the order of // track parameters are subject for possible changes ! // Use GetExternalParameters() and GetExternalCovariance() to access TPC // track information regardless of its internal representation. // This formation is now fixed in the following way: // external param0: local Y-coordinate of a track (cm) // external param1: local Z-coordinate of a track (cm) // external param2: local sine of the track momentum azimuth angle // external param3: tangent of the track momentum dip angle // external param4: 1/pt (1/(GeV/c)) // #include #include #include "AliTPCreco.h" #include "AliExternalTrackParam.h" class AliESDtrack; //_____________________________________________________________________________ class AliTPCtrack : public AliKalmanTrack { public: AliTPCtrack(); AliTPCtrack(UInt_t index, const Double_t xx[5], const Double_t cc[15], Double_t xr, Double_t alpha); AliTPCtrack(const AliESDtrack& t); AliTPCtrack(const AliTPCtrack& t); virtual ~AliTPCtrack() {} Int_t PropagateToVertex(Double_t x0=36.66,Double_t rho=1.2e-3); Int_t Rotate(Double_t angle); void SetdEdx(Double_t dedx) {fdEdx=dedx;} Double_t GetYat(Double_t x) const ; Double_t GetX() const {return fX;} Double_t GetAlpha() const {return fAlpha;} Double_t GetdEdx() const {return fdEdx;} Double_t GetPIDsignal() const {return GetdEdx();} Double_t GetY() const {return fP0;} Double_t GetZ() const {return fP1;} Double_t GetSnp() const {return fX*fP4 - fP2;} Double_t Get1Pt() const { return (TMath::Sign(1e-9,fP4) + fP4)*GetLocalConvConst(); } Double_t GetTgl() const {return fP3;} Double_t GetSigmaY2() const {return fC00;} Double_t GetSigmaZ2() const {return fC11;} // Some methods useful for users. Implementation is not // optimized for speed but for minimal maintanance effort Double_t Phi() const; Double_t Theta() const {return TMath::Pi()/2.-TMath::ATan(GetTgl());} Double_t Px() const {return TMath::Cos(Phi())/TMath::Abs(Get1Pt());} Double_t Py() const {return TMath::Sin(Phi())/TMath::Abs(Get1Pt());} Double_t Pz() const {return GetTgl()/TMath::Abs(Get1Pt());} Double_t Pt() const {return 1./TMath::Abs(Get1Pt());} Double_t P() const {return TMath::Sqrt(Pt()*Pt()+Pz()*Pz());} Int_t Compare(const TObject *o) const; void GetExternalParameters(Double_t& xr, Double_t x[5]) const ; void GetExternalCovariance(Double_t cov[15]) const ; // [SR, 01.04.2003] Int_t GetNumber() const {return fNumber;} void SetNumber(Int_t n) {fNumber = n;} // Int_t GetClusterIndex(Int_t i) const {return fIndex[i];} //******** To be removed next release !!! ************** Double_t GetEta() const {return fP2;} Double_t GetC() const {return fP4;} void GetCovariance(Double_t cc[15]) const { cc[0 ]=fC00; cc[1 ]=fC10; cc[2 ]=fC11; cc[3 ]=fC20; cc[4 ]=fC21; cc[5 ]=fC22; cc[6 ]=fC40; cc[7 ]=fC41; cc[8 ]=fC42; cc[9 ]=fC44; cc[10]=fC30; cc[11]=fC31; cc[12]=fC32; cc[13]=fC43; cc[14]=fC33; } //****************************************************** virtual Double_t GetPredictedChi2(const AliCluster *cluster) const; Int_t PropagateTo(Double_t xr,Double_t x0=28.94,Double_t rho=0.9e-3); Int_t Update(const AliCluster* c, Double_t chi2, UInt_t i); void ResetCovariance(); void ResetClusters() {SetNumberOfClusters(0); SetChi2(0.);} void UpdatePoints();//update points Float_t* GetPoints() {return fPoints;} // // TClonesArray * fHelixIn; //array of helixes //TClonesArray * fHelixOut; //array of helixes // Float_t Density(Int_t row0, Int_t row1); //calculate cluster density Float_t Density2(Int_t row0, Int_t row1); //calculate cluster density Double_t GetZat0() const; Double_t GetD(Double_t x=0, Double_t y=0) const; AliExternalTrackParam & GetReference(){ return fReference;} void UpdateReference(){ new (&fReference) AliExternalTrackParam(*this);} Int_t GetKinkIndex(Int_t i) const{ return fKinkIndexes[i];} Int_t* GetKinkIndexes() { return fKinkIndexes;} Int_t GetV0Index(Int_t i) const{ return fV0Indexes[i];} Int_t* GetV0Indexes() { return fV0Indexes;} protected: void GetXYZ(Float_t r[3]) const; Double_t fX; // X-coordinate of this track (reference plane) Double_t fAlpha; // Rotation angle the local (TPC sector) // coordinate system and the global ALICE one. Double_t fdEdx; // dE/dx Double_t fP0; // Y-coordinate of a track Double_t fP1; // Z-coordinate of a track Double_t fP2; // C*x0 Double_t fP3; // tangent of the track momentum dip angle Double_t fP4; // track curvature Double_t fC00; // covariance Double_t fC10, fC11; // matrix Double_t fC20, fC21, fC22; // of the Double_t fC30, fC31, fC32, fC33; // track Double_t fC40, fC41, fC42, fC43, fC44; // parameters Int_t fIndex[kMaxRow]; // indices of associated clusters Float_t fPoints[4]; //first, max dens row end points of the track and max density //[SR, 01.04.2003] Int_t fNumber; // magic number used for number of clusters // MI addition Float_t fSdEdx; // sigma of dedx // Int_t fNFoundable; //number of foundable clusters - dead zone taken to the account Bool_t fBConstrain; // indicate seeding with vertex constrain Int_t fLastPoint; // last cluster position Int_t fFirstPoint; // first cluster position Int_t fRemoval; // removal factor Int_t fTrackType; // track type - 0 - normal - 1 - kink - 2 -V0 3- double found Int_t fLab2; // index of corresponding track (kink, V0, double) Int_t fNShared; // number of shared points AliExternalTrackParam fReference; // track parameters at the middle of the chamber Float_t fKinkPoint[12]; //radius, of kink, dfi and dtheta Int_t fKinkIndexes[3]; // kink indexes - minus = mother + daughter Int_t fV0Indexes[3]; // kink indexes - minus = mother + daughter ClassDef(AliTPCtrack,2) // Time Projection Chamber reconstructed tracks }; inline void AliTPCtrack::GetExternalParameters(Double_t& xr, Double_t x[5]) const { // This function return external TPC track representation xr=fX; x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt(); } inline void AliTPCtrack::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 - fP0*sn; r[1]=fX*sn + fP0*cs; r[2]=fP1; } #endif