* 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"
+
+#include "AliVTrack.h"
-const Double_t kB2C=0.299792458e-3;
-const Double_t kAlmost1=0.999;
-const Double_t kAlmost0=1e-33;
const Double_t kVeryBig=1./kAlmost0;
+const Double_t kMostProbablePt=0.35;
-class AliKalmanTrack;
+class AliVVertex;
+class TPolyMarker3D;
-class AliExternalTrackParam: public TObject {
+class AliExternalTrackParam: public AliVTrack {
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]);
- AliExternalTrackParam(const AliKalmanTrack& track);
+ AliExternalTrackParam(const AliVTrack *vTrack);
+ AliExternalTrackParam(Double_t xyz[3],Double_t pxpypz[3],
+ Double_t cv[21],Short_t sign);
+ virtual ~AliExternalTrackParam(){}
+
+ template <typename T>
+ void Set(T x, T alpha, const T param[5], const T covar[15]) {
+ // Sets the parameters
+ fX=x; fAlpha=alpha;
+ for (Int_t i = 0; i < 5; i++) fP[i] = param[i];
+ for (Int_t i = 0; i < 15; i++) fC[i] = covar[i];
+ }
+
+ void Set(Double_t xyz[3],Double_t pxpypz[3],Double_t cv[21],Short_t sign);
+
+ static void SetMostProbablePt(Double_t pt) { fgMostProbablePt=pt; }
+ static Double_t GetMostProbablePt() { return fgMostProbablePt; }
void Reset();
- void Set(const AliKalmanTrack& track);
+ void ResetCovariance(Double_t s2);
+ void AddCovariance(const Double_t cov[15]);
const Double_t *GetParameter() const {return fP;}
const Double_t *GetCovariance() const {return fC;}
- virtual Double_t GetX() const {return fX;}
- virtual Double_t GetAlpha() const {return fAlpha;}
+
+ Double_t GetAlpha() const {return fAlpha;}
+ Double_t GetX() const {return fX;}
+ Double_t GetY() const {return fP[0];}
+ Double_t GetZ() const {return fP[1];}
+ Double_t GetSnp() const {return fP[2];}
+ Double_t GetTgl() const {return fP[3];}
+ Double_t GetSigned1Pt() const {return fP[4];}
+
+ Double_t GetSigmaY2() const {return fC[0];}
+ Double_t GetSigmaZY() const {return fC[1];}
+ Double_t GetSigmaZ2() const {return fC[2];}
+ Double_t GetSigmaSnpY() const {return fC[3];}
+ Double_t GetSigmaSnpZ() const {return fC[4];}
+ Double_t GetSigmaSnp2() const {return fC[5];}
+ Double_t GetSigmaTglY() const {return fC[6];}
+ Double_t GetSigmaTglZ() const {return fC[7];}
+ Double_t GetSigmaTglSnp() const {return fC[8];}
+ Double_t GetSigmaTgl2() const {return fC[9];}
+ Double_t GetSigma1PtY() const {return fC[10];}
+ Double_t GetSigma1PtZ() const {return fC[11];}
+ Double_t GetSigma1PtSnp() const {return fC[12];}
+ 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;
+ virtual Short_t Charge() const { return (Short_t)GetSign(); }
+ virtual const Double_t *PID() const { return 0x0; }
+
+ // additional functions from AliVTrack
+ virtual Int_t GetID() const { return -999; }
+ virtual UChar_t GetITSClusterMap() const {return 0; }
+ virtual ULong_t GetStatus() const { return 0; }
+
Double_t GetSign() const {return (fP[4]>0) ? 1 : -1;}
Double_t GetP() const;
- Double_t GetD(Double_t b, Double_t xv, Double_t yv) const;
+ Double_t GetSignedPt() const {
+ return (TMath::Abs(fP[4])>kAlmost0) ? 1./fP[4]:TMath::Sign(kVeryBig,fP[4]);
+ }
+ Double_t Get1P() const;
+ virtual Double_t GetC(Double_t b) const {return fP[4]*b*kB2C;}
+ 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 CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho,
+ Double_t mass, Bool_t anglecorr=kFALSE,
+ Double_t (*f)(Double_t)=AliExternalTrackParam::BetheBlochSolid);
+
+ //
+ // Bethe-Bloch formula parameterizations
+ //
+ static Double_t BetheBlochAleph(Double_t bg,
+ Double_t kp1=0.76176e-1,
+ Double_t kp2=10.632,
+ Double_t kp3=0.13279e-4,
+ Double_t kp4=1.8631,
+ Double_t kp5=1.9479
+ );
+ static Double_t BetheBlochGeant(Double_t bg,
+ Double_t kp0=2.33,
+ Double_t kp1=0.20,
+ Double_t kp2=3.00,
+ Double_t kp3=173e-9,
+ Double_t kp4=0.49848
+ );
+
+ static Double_t BetheBlochSolid(Double_t bg);
+ static Double_t BetheBlochGas(Double_t bg);
+
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;
+
+ 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) {
- if (Rotate(alpha))
- if (PropagateTo(x,b)) return kTRUE;
- return kFALSE;
- }
+ 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;
- // MI
- virtual Bool_t CorrectForMaterial(Double_t d, Double_t x0, Double_t rho, Double_t mass);
- virtual Bool_t PropagateTo(Double_t x, Double_t mass, Double_t maxStep, Bool_t rotateTo=kTRUE);
+ 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);
-private:
- Double_t fX; // X coordinate for the point of parametrisation
- Double_t fAlpha; // Local <-->global coor.system rotation angle
- Double_t fP[5]; // The track parameters
- Double_t fC[15]; // The track parameter covariance matrix
+ 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;}
+ //
+ // 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);
- ClassDef(AliExternalTrackParam, 4)
+ virtual Bool_t Translate(Double_t *vTrasl,Double_t *covV);
+
+ protected:
+ 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)
};
+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