#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)) *
- *****************************************************************************/
-
+//
+// 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 <AliKalmanTrack.h>
#include <TMath.h>
-const Double_t kConversionConstant=100/0.299792458/0.2;
-
-class AliTPCClustersArray;
-class AliTPCcluster;
+#include "AliTPCreco.h"
+#include "AliExternalTrackParam.h"
+class AliESDtrack;
//_____________________________________________________________________________
class AliTPCtrack : public AliKalmanTrack {
public:
- AliTPCtrack():AliKalmanTrack(){}
+ 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);
- Int_t PropagateToVertex(
- Double_t x0=36.66,Double_t rho=1.2e-3,Double_t pm=0.139);
+ virtual ~AliTPCtrack() {}
+ Int_t PropagateToVertex(Double_t x0=36.66,Double_t rho=1.2e-3);
Int_t Rotate(Double_t angle);
- void CookLabel(AliTPCClustersArray *carray);
- void SetdEdx(Float_t dedx) {fdEdx=dedx;}
+ 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*fP3 - fP2;}
- Double_t Get1Pt() const {return fP3*kConversionConstant;}
- Double_t GetTgl() const {return fP4;}
+ Double_t GetSnp() const {return fX*fP4 - fP2;}
+ Double_t
+ Get1Pt() const { return (1e-9*TMath::Abs(fP4)/fP4 + fP4)*GetConvConst(); }
+ 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 fP3;}
+ 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 ]=fC30; cc[7 ]=fC31; cc[8 ]=fC32; cc[9 ]=fC33;
- cc[10]=fC40; cc[11]=fC41; cc[12]=fC42; cc[13]=fC43; cc[14]=fC44;
- }
+ 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;
+ }
//******************************************************
- void GetCluster(Int_t i, Int_t &sec, Int_t &row, Int_t &ncl) const;
-
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,Double_t pm=0.139);
+ 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);
-
-private:
+ 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;}
+protected:
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 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; // track curvature
- Double_t fP4; // tangent of the track momentum dip angle
+ 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
-
- UInt_t fIndex[200]; // indices of associated clusters
- ClassDef(AliTPCtrack,1) // Time Projection Chamber reconstructed tracks
+ 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
+
+ ClassDef(AliTPCtrack,2) // Time Projection Chamber reconstructed tracks
};
-
-inline
-void AliTPCtrack::GetCluster(Int_t i,Int_t &sec,Int_t &row,Int_t &ncl) const {
- //return sector, pad row and the index of the i-th cluster of this track
- Int_t index=fIndex[i];
- sec=(index&0xff000000)>>24;
- row=(index&0x00ff0000)>>16;
- ncl=(index&0x0000ffff)>>00;
-}
-
inline
void AliTPCtrack::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
- //---------------------------------------------------------------------
// This function return external TPC track representation
- //---------------------------------------------------------------------
- xr=fX;
+ xr=fX;
x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
}
#endif
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff