New more general analysis implemention for particle identification and correlation...

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

diff --git a/STEER/AliExternalTrackParam.h b/STEER/AliExternalTrackParam.h
index e1b5af9f9f925dc635b75e7a4a1b22e65f9d26fb..896b877e3cac20805c3409b6341cac29d27ee3fd 100644 (file)
--- a/STEER/AliExternalTrackParam.h
+++ b/STEER/AliExternalTrackParam.h
@@ -22,18 +22,14 @@
 
 #include "AliVParticle.h"
 
-const Double_t kAlmost1=0.999;
-const Double_t kAlmost0=1e-33;
 const Double_t kVeryBig=1./kAlmost0;
-
-const Double_t kB2C=0.299792458e-3;
-const Double_t kAlmost0Field=1.e-13;
 const Double_t kMostProbablePt=0.35;
 
-class AliESDVertex;
-
 Double_t ApproximateBetheBloch(Double_t);
 
+class AliESDVertex;
+class TPolyMarker3D; 
+
 class AliExternalTrackParam: public AliVParticle {
  public:
   AliExternalTrackParam();
@@ -85,6 +81,13 @@ class AliExternalTrackParam: public AliVParticle {
   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;
@@ -115,6 +118,7 @@ class AliExternalTrackParam: public AliVParticle {
   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);
@@ -130,8 +134,9 @@ class AliExternalTrackParam: public AliVParticle {
   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;
@@ -149,13 +154,16 @@ class AliExternalTrackParam: public AliVParticle {
 
   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;}
-
-
-protected:
+  //
+  // 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