3 /* Copyright(c) 1998-2007, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 //-------------------------------------------------------------------------
9 // base class for ESD and AOD particles
10 // Author: Markus Oldenburg, CERN
11 //-------------------------------------------------------------------------
15 #include "AliVVMisc.h"
16 #include "AliVVtrack.h"
20 const Double_t kAlmost1=1. - Double_t(FLT_EPSILON);
21 const Double_t kAlmost0=Double_t(FLT_MIN);
23 const Double_t kB2C=-0.299792458e-3;
24 const Double_t kAlmost0Field=1.e-13;
26 class AliVParticle: public TObject, public AliVVtrack {
30 virtual ~AliVParticle() { }
31 AliVParticle(const AliVParticle& vPart);
32 AliVParticle& operator=(const AliVParticle& vPart);
34 // constructor for reinitialisation of vtable
35 AliVParticle( AliVVConstructorReinitialisationFlag ) :TObject(*this){}
38 virtual Double_t Px() const = 0;
39 virtual Double_t Py() const = 0;
40 virtual Double_t Pz() const = 0;
41 virtual Double_t Pt() const = 0;
42 virtual Double_t P() const = 0;
43 virtual Bool_t PxPyPz(Double_t p[3]) const = 0;
45 virtual Double_t Xv() const = 0;
46 virtual Double_t Yv() const = 0;
47 virtual Double_t Zv() const = 0;
48 virtual Bool_t XvYvZv(Double_t x[3]) const = 0;
50 virtual Double_t OneOverPt() const = 0;
51 virtual Double_t Phi() const = 0;
52 virtual Double_t Theta() const = 0;
55 virtual Double_t E() const = 0;
56 virtual Double_t M() const = 0;
58 virtual Double_t Eta() const = 0;
59 virtual Double_t Y() const = 0;
61 virtual Short_t Charge() const = 0;
62 virtual Int_t GetLabel() const = 0;
64 virtual Int_t PdgCode() const = 0;
65 virtual const Double_t *PID() const = 0; // return PID object (to be defined, still)
69 /** Compare this class with an other instance of this class
70 * used in a TCollection::Sort()/TClonesArray::Sort()
71 * @param obj ptr to other instance
72 * @return Returns 0 when equal, 1 when this is smaller
73 * and -1 when bigger -- sorts descending
75 Int_t Compare( const TObject* obj) const;
78 /** Defines this class as being sortable in a TCollection
79 * @return always kTRUE;
81 Bool_t IsSortable() const { return kTRUE; }
84 // coordinate system conversions
85 Bool_t Local2GlobalMomentum(Double_t p[3], Double_t alpha) const;
86 Bool_t Local2GlobalPosition(Double_t r[3], Double_t alpha) const;
87 Bool_t Global2LocalMomentum(Double_t p[3], Short_t charge, Double_t &alpha) const;
88 Bool_t Global2LocalPosition(Double_t r[3], Double_t alpha) const;
92 ClassDef(AliVParticle, 5) // base class for particles