+ Double_t GetPredictedChi2(const AliExternalTrackParam *t) const;
+
+ Bool_t
+ PropagateTo(Double_t p[3],Double_t covyz[3],Double_t covxyz[3],Double_t b);
+
+ Double_t *GetResiduals(Double_t *p,Double_t *cov,Bool_t updated=kTRUE) const;
+ Bool_t Update(Double_t p[2],Double_t cov[3]);
+ Bool_t Rotate(Double_t alpha);
+ Bool_t PropagateTo(Double_t x, Double_t b);
+ Bool_t Propagate(Double_t alpha, Double_t x, Double_t b);
+ Bool_t PropagateBxByBz(Double_t alpha, Double_t x, Double_t b[3]);
+ void Propagate(Double_t len,Double_t x[3],Double_t p[3],Double_t bz) const;
+ Bool_t Intersect(Double_t pnt[3], Double_t norm[3], Double_t bz) const;
+
+ static void g3helx3(Double_t qfield, Double_t step, Double_t vect[7]);
+ Bool_t PropagateToBxByBz(Double_t x, const Double_t b[3]);
+
+ void GetHelixParameters(Double_t h[6], Double_t b) const;
+ Double_t GetDCA(const AliExternalTrackParam *p, Double_t b,
+ Double_t &xthis,Double_t &xp) const;
+ Double_t PropagateToDCA(AliExternalTrackParam *p, Double_t b);
+ Bool_t PropagateToDCA(const AliVVertex *vtx, Double_t b, Double_t maxd,
+ Double_t dz[2]=0, Double_t cov[3]=0);
+ Bool_t PropagateToDCABxByBz(const AliVVertex *vtx, Double_t b[3],
+ Double_t maxd, Double_t dz[2]=0, Double_t cov[3]=0);
+
+ void GetDirection(Double_t d[3]) const;
+ Bool_t GetPxPyPz(Double_t *p) const;
+ Bool_t GetXYZ(Double_t *p) const;
+ Bool_t GetCovarianceXYZPxPyPz(Double_t cv[21]) const;
+ Bool_t GetPxPyPzAt(Double_t x, Double_t b, Double_t p[3]) const;
+ Bool_t GetXYZAt(Double_t x, Double_t b, Double_t r[3]) const;
+ Bool_t GetYAt(Double_t x, Double_t b, Double_t &y) const;
+ Bool_t GetZAt(Double_t x, Double_t b, Double_t &z) const;
+ void Print(Option_t* option = "") const;
+ Double_t GetSnpAt(Double_t x,Double_t b) const;
+
+ //Deprecated
+ Bool_t CorrectForMaterial(Double_t d, Double_t x0, Double_t mass,
+ Double_t (*f)(Double_t)=AliExternalTrackParam::BetheBlochSolid);
+
+ Bool_t GetDistance(AliExternalTrackParam *param2, Double_t x, Double_t dist[3], Double_t b);
+ Int_t GetIndex(Int_t i, Int_t j) const;
+ Int_t GetLabel() const {return -1;}
+ Int_t PdgCode() const {return 0;}
+
+ //
+ // visualization (M. Ivanov)
+ //
+ virtual void FillPolymarker(TPolyMarker3D *pol, Float_t magf, Float_t minR, Float_t maxR, Float_t stepR);
+ virtual void DrawTrack(Float_t magF, Float_t minR, Float_t maxR, Float_t stepR);
+
+ virtual Bool_t Translate(Double_t *vTrasl,Double_t *covV);
+
+ void CheckCovariance();
+
+/* protected: */
+ private:
+ Double_t &Par(Int_t i) {return fP[i];}
+ Double_t &Cov(Int_t i) {return fC[i];}
+
+ private:
+ Double32_t fX; // X coordinate for the point of parametrisation
+ Double32_t fAlpha; // Local <-->global coor.system rotation angle
+ Double32_t fP[5]; // The track parameters
+ Double32_t fC[15]; // The track parameter covariance matrix
+
+ static Double32_t fgMostProbablePt; // "Most probable" pt
+ // (to be used if Bz=0)
+ ClassDef(AliExternalTrackParam, 8)