* system rotated by angle alpha with respect to the global coord.system. *
* Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch *
*****************************************************************************/
-#include "TObject.h"
#include "TMath.h"
-const Double_t kAlmost1=0.999;
-const Double_t kAlmost0=1e-33;
-const Double_t kVeryBig=1./kAlmost0;
+#include "AliVParticle.h"
-const Double_t kB2C=0.299792458e-3;
-const Double_t kAlmost0Field=1.e-13;
+const Double_t kVeryBig=1./kAlmost0;
const Double_t kMostProbablePt=0.35;
-class AliESDVertex;
-
Double_t ApproximateBetheBloch(Double_t);
-class AliExternalTrackParam: public TObject {
+class AliESDVertex;
+class TPolyMarker3D;
+
+class AliExternalTrackParam: public AliVParticle {
public:
AliExternalTrackParam();
AliExternalTrackParam(const AliExternalTrackParam &);
+ AliExternalTrackParam& operator=(const AliExternalTrackParam & trkPar);
AliExternalTrackParam(Double_t x, Double_t alpha,
const Double_t param[5], const Double_t covar[15]);
virtual ~AliExternalTrackParam(){}
void Set(Double_t x,Double_t alpha,
const Double_t param[5], const Double_t covar[15]);
+
+ static void SetMostProbablePt(Double_t pt) { fgMostProbablePt=pt; }
+ static Double_t GetMostProbablePt() { return fgMostProbablePt; }
+
void Reset();
- void ResetCovariance(Double_t s2) {
- fC[0]*= s2;
- fC[1] = 0.; fC[2]*= s2;
- fC[3] = 0.; fC[4] = 0.; fC[5]*= s2;
- fC[6] = 0.; fC[7] = 0.; fC[8] = 0.; fC[9]*= s2;
- fC[10]= 0.; fC[11]= 0.; fC[12]= 0.; fC[13]= 0.; fC[14]*=s2;
- }
+ void ResetCovariance(Double_t s2);
const Double_t *GetParameter() const {return fP;}
const Double_t *GetCovariance() const {return fC;}
Double_t GetZ() const {return fP[1];}
Double_t GetSnp() const {return fP[2];}
Double_t GetTgl() const {return fP[3];}
- Double_t Get1Pt() const {return fP[4];}
+ Double_t GetSigned1Pt() const {return fP[4];}
Double_t GetSigmaY2() const {return fC[0];}
Double_t GetSigmaZY() const {return fC[1];}
Double_t GetSigma1PtTgl() const {return fC[13];}
Double_t GetSigma1Pt2() const {return fC[14];}
+ // additional functions for AliVParticle
+ Double_t Px() const;
+ Double_t Py() const;
+ Double_t Pz() const;
+ Double_t Pt() const { return TMath::Abs(GetSignedPt()); }
+ Double_t P() const { return GetP(); }
+ Bool_t PxPyPz(Double_t p[3]) const { return GetPxPyPz(p); }
+
+ Double_t Xv() const;
+ Double_t Yv() const;
+ Double_t Zv() const;
+ Bool_t XvYvZv(Double_t x[3]) const { return GetXYZ(x); }
+
+ Double_t OneOverPt() const { return 1./Pt(); }
+ Double_t Phi() const;
+ Double_t Theta() const;
+ virtual Double_t E() const;
+ virtual Double_t M() const;
+ Double_t Eta() const;
+ virtual Double_t Y() const;
+ Short_t Charge() const { return (Short_t)GetSign(); }
+ const Double_t *PID() const { return 0x0; }
+
Double_t GetSign() const {return (fP[4]>0) ? 1 : -1;}
Double_t GetP() const;
- Double_t GetPt() const {
+ Double_t GetSignedPt() const {
return (TMath::Abs(fP[4])>kAlmost0) ? 1./fP[4]:TMath::Sign(kVeryBig,fP[4]);
}
Double_t Get1P() const;
void GetDZ(Double_t x,Double_t y,Double_t z,Double_t b,Float_t dz[2]) const;
Double_t GetD(Double_t xv, Double_t yv, Double_t b) const;
Double_t GetLinearD(Double_t xv, Double_t yv) const;
- Bool_t CorrectForMaterial(Double_t d, Double_t x0, Double_t mass,
- Double_t (*f)(Double_t)=ApproximateBetheBloch);
+ Bool_t CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho,
+ Double_t mass, Bool_t anglecorr=kFALSE,
+ Double_t (*f)(Double_t)=ApproximateBetheBloch);
Double_t GetPredictedChi2(Double_t p[2],Double_t cov[3]) const;
+
+ Double_t
+ GetPredictedChi2(Double_t p[3],Double_t covyz[3],Double_t covxyz[3]) 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);
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 AliESDVertex *vtx, Double_t b, Double_t maxd);
-
+ Bool_t PropagateToDCA(const AliESDVertex *vtx, Double_t b, 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;
void Print(Option_t* option = "") const;
Double_t GetSnpAt(Double_t x,Double_t b) const;
-protected:
+ //Deprecated
+ Bool_t CorrectForMaterial(Double_t d, Double_t x0, Double_t mass,
+ Double_t (*f)(Double_t)=ApproximateBetheBloch);
+
+ 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 {return i+(j+1)*j/2;}
+ //
+ // 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);
+ protected:
Double_t &Par(Int_t i) {return fP[i];}
Double_t &Cov(Int_t i) {return fC[i];}
-
-private:
+
+ 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
- ClassDef(AliExternalTrackParam, 5)
+ static Double32_t fgMostProbablePt; // "Most probable" pt
+ // (to be used if Bz=0)
+ ClassDef(AliExternalTrackParam, 7)
};
+inline void AliExternalTrackParam::ResetCovariance(Double_t s2) {
+ //
+ // Reset the covarince matrix to "something big"
+ //
+ fC[0]*= s2;
+ fC[1] = 0.; fC[2]*= s2;
+ fC[3] = 0.; fC[4] = 0.; fC[5]*= s2;
+ fC[6] = 0.; fC[7] = 0.; fC[8] = 0.; fC[9]*= s2;
+ fC[10]= 0.; fC[11]= 0.; fC[12]= 0.; fC[13]= 0.; fC[14]*=s2;
+}
+
+
+
+
#endif
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff