- Three classes by MinJung Kweon AliHFEpriVtx, AliHFEsecVtx and AliHFEmcQA for primar...

[u/mrichter/AliRoot.git] / STEER / AliExternalTrackParam.h

diff --git a/STEER/AliExternalTrackParam.h b/STEER/AliExternalTrackParam.h
index 4d2c1aaa331535a40ee4f6aaad281610aa8bf918..1b08a51ebbfac6d46250f43a3c9ec34b16831078 100644 (file)
--- a/STEER/AliExternalTrackParam.h
+++ b/STEER/AliExternalTrackParam.h
@@ -20,27 +20,35 @@
  *****************************************************************************/
 #include "TMath.h"
 
-#include "AliVParticle.h"
+#include "AliVTrack.h"
 
 const Double_t kVeryBig=1./kAlmost0;
 const Double_t kMostProbablePt=0.35;
 
-Double_t ApproximateBetheBloch(Double_t);
-
-class AliESDVertex;
+class AliVVertex;
 class TPolyMarker3D; 
 
-class AliExternalTrackParam: public AliVParticle {
+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 AliVTrack *vTrack);
+  AliExternalTrackParam(Double_t xyz[3],Double_t pxpypz[3],
+                       Double_t cv[21],Short_t sign);
   virtual ~AliExternalTrackParam(){}
 
-  void Set(Double_t x,Double_t alpha,
-                       const Double_t param[5], const Double_t covar[15]);
+  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; }
@@ -96,8 +104,13 @@ class AliExternalTrackParam: public AliVParticle {
   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; }
+  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;
@@ -105,13 +118,35 @@ class AliExternalTrackParam: public AliVParticle {
     return (TMath::Abs(fP[4])>kAlmost0) ? 1./fP[4]:TMath::Sign(kVeryBig,fP[4]);
   }
   Double_t Get1P() const;
-  Double_t GetC(Double_t b) const {return fP[4]*b*kB2C;}
+  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)=ApproximateBetheBloch);
+       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 
@@ -123,19 +158,18 @@ class AliExternalTrackParam: public AliVParticle {
   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);
   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 AliESDVertex *vtx, Double_t b, Double_t maxd,
+  Bool_t PropagateToDCA(const AliVVertex *vtx, Double_t b, Double_t maxd,
                         Double_t dz[2]=0, Double_t cov[3]=0);
   
   void GetDirection(Double_t d[3]) const;
@@ -151,10 +185,10 @@ class AliExternalTrackParam: public AliVParticle {
 
   //Deprecated
   Bool_t CorrectForMaterial(Double_t d, Double_t x0, Double_t mass,
-                           Double_t (*f)(Double_t)=ApproximateBetheBloch);
+        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 {return i+(j+1)*j/2;}
+  Int_t GetIndex(Int_t i, Int_t j) const;
   Int_t GetLabel() const {return -1;} 
   //
   // visualization (M. Ivanov)
@@ -173,7 +207,7 @@ class AliExternalTrackParam: public AliVParticle {
 
   static Double32_t    fgMostProbablePt; // "Most probable" pt
                                          // (to be used if Bz=0)
-  ClassDef(AliExternalTrackParam, 7)
+  ClassDef(AliExternalTrackParam, 8)
 };
 
 inline void AliExternalTrackParam::ResetCovariance(Double_t s2) {