Return the most probable momentum if the magnetic field is too weak and the momentum...

[u/mrichter/AliRoot.git] / ITS / AliITStrackV2.h

diff --git a/ITS/AliITStrackV2.h b/ITS/AliITStrackV2.h
index 02de2e21504e26db3e09743a9a55183349284ae6..d3fa37d81beff41fd3dfc2f5c810f3cbd5d46d85 100644 (file)
--- a/ITS/AliITStrackV2.h
+++ b/ITS/AliITStrackV2.h
@@ -30,20 +30,19 @@
 #include "AliITSrecoV2.h"
 
 class AliESDtrack;
-class AliTPCtrack;
+class AliStrLine;
 
 //_____________________________________________________________________________
 class AliITStrackV2 : public AliKalmanTrack {
 public:
   AliITStrackV2();
-  AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *);
-  AliITStrackV2(AliESDtrack& t) throw (const Char_t *);
+  AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *);
   AliITStrackV2(const AliITStrackV2& t);
   Int_t PropagateToVertex(Double_t d=0., Double_t x0=0.);
-  Int_t PropagateToPrimVertex(Double_t x0,Double_t rho){return PropagateToVertex(rho,x0);}
   Int_t Propagate(Double_t alpha, Double_t xr);
-  Int_t CorrectForMaterial(Double_t d, Double_t x0=21.82);
+  virtual Int_t CorrectForMaterial(Double_t d, Double_t x0=21.82);
   Int_t PropagateTo(Double_t xr, Double_t d, Double_t x0=21.82);
+  Double_t PropagateToDCA(AliKalmanTrack *p, Double_t d=0., Double_t x0=0.); 
   Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
   Int_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
   void SetdEdx(Double_t dedx) {fdEdx=dedx;}
@@ -52,11 +51,10 @@ public:
   void SetDetectorIndex(Int_t i) {SetLabel(i);}
   void ResetCovariance();
   void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
-  void UpdateESDtrack(ULong_t flags);
-  
-  void *operator new(size_t /* s */,void *p) { return p; }
-  void *operator new(size_t s) { return ::operator new(s); }
+  void UpdateESDtrack(ULong_t flags) const;
   
+  AliESDtrack *GetESDtrack() const {return fESDtrack;}
+
   Int_t GetDetectorIndex() const {return GetLabel();}
   Double_t GetX()    const {return fX;}
   Double_t GetAlpha()const {return fAlpha;}
@@ -66,9 +64,11 @@ public:
   Double_t GetZ()    const {return fP1;}
   Double_t GetSnp()  const {return fP2;}
   Double_t GetTgl()  const {return fP3;}
-  Double_t
-    Get1Pt() const { return (1e-9*TMath::Abs(fP4)/fP4 + fP4)*GetConvConst(); }
+  Double_t GetC()    const {return fP4;}
+  Double_t Get1Pt() const;
   Double_t GetD(Double_t x=0, Double_t y=0) const;
+  Double_t GetZat(Double_t x=0) const;
+
   Double_t GetSigmaY2() const {return fC00;}
   Double_t GetSigmaZ2() const {return fC11;}
   Int_t Compare(const TObject *o) const;
@@ -76,10 +76,16 @@ public:
   void GetExternalCovariance(Double_t cov[15]) const ;
   Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
   Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
+  void ApproximateHelixWithLine(Double_t xk, AliStrLine *line);
   Double_t GetPredictedChi2(const AliCluster *cluster) const;
   Int_t Invariant() const;
+
+  void  SetExtraCluster(Int_t i, Int_t idx) {fIndex[kMaxLayer+i]=idx;}
+  Int_t GetExtraCluster(Int_t i) const {return fIndex[kMaxLayer+i];}
  
-private:
+protected:
+  void GetXYZ(Float_t r[3]) const;
+
   Double_t fX;              // X-coordinate of this track (reference plane)
   Double_t fAlpha;          // rotation angle
 
@@ -97,13 +103,11 @@ private:
   Double_t fC30, fC31, fC32, fC33;       // track
   Double_t fC40, fC41, fC42, fC43, fC44; // parameters 
 
-  UInt_t fIndex[kMaxLayer]; // indices of associated clusters 
-
-  Float_t fdEdxSample[4];   // array of dE/dx samples b.b.
+  Int_t fIndex[2*kMaxLayer]; // indices of associated clusters 
+  Float_t fdEdxSample[4];    // array of dE/dx samples b.b.
 
-  AliESDtrack *fESDtrack;   //! pointer to the connected ESD track
-
-  ClassDef(AliITStrackV2,2)   //ITS reconstructed track
+  AliESDtrack *fESDtrack;    //! pointer to the connected ESD track
+  ClassDef(AliITStrackV2,5)  //ITS reconstructed track
 };
 
 inline 
@@ -112,7 +116,8 @@ void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
   // This function return external ITS track representation
   //---------------------------------------------------------------------
      xr=fX;          
-     x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
+     x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl();
+     x[4]=(TMath::Sign(1e-9,fP4) + fP4)*GetLocalConvConst();
 }
 
 inline
@@ -127,6 +132,15 @@ void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
   q *= TMath::Sqrt((1-s*s)/(1+t*t));
   fdEdxSample[i]=q;
 }
+
+inline void AliITStrackV2::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