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 //-------------------------------------------------------------------------
18 const Double_t kAlmost1=1. - Double_t(FLT_EPSILON);
19 const Double_t kAlmost0=Double_t(FLT_MIN);
21 const Double_t kB2C=-0.299792458e-3;
22 const Double_t kAlmost0Field=1.e-13;
24 class AliVParticle: public TObject {
27 AliVParticle() : fPoolID(-1) { }
28 virtual ~AliVParticle() { }
29 AliVParticle(const AliVParticle& vPart);
30 AliVParticle& operator=(const AliVParticle& vPart);
32 virtual void SetPoolID(const Int_t id) {fPoolID = id;}
33 virtual Int_t GetPoolID() const {return fPoolID;}
36 virtual Double_t Px() const = 0;
37 virtual Double_t Py() const = 0;
38 virtual Double_t Pz() const = 0;
39 virtual Double_t Pt() const = 0;
40 virtual Double_t P() const = 0;
41 virtual Bool_t PxPyPz(Double_t p[3]) const = 0;
43 virtual Double_t Xv() const = 0;
44 virtual Double_t Yv() const = 0;
45 virtual Double_t Zv() const = 0;
46 virtual Bool_t XvYvZv(Double_t x[3]) const = 0;
48 virtual Double_t OneOverPt() const = 0;
49 virtual Double_t Phi() const = 0;
50 virtual Double_t Theta() const = 0;
53 virtual Double_t E() const = 0;
54 virtual Double_t M() const = 0;
56 virtual Double_t Eta() const = 0;
57 virtual Double_t Y() const = 0;
59 virtual Short_t Charge() const = 0;
60 virtual Int_t GetLabel() const = 0;
62 virtual Int_t PdgCode() const = 0;
63 virtual const Double_t *PID() const = 0; // return PID object (to be defined, still)
67 /** Compare this class with an other instance of this class
68 * used in a TCollection::Sort()/TClonesArray::Sort()
69 * @param obj ptr to other instance
70 * @return Returns 0 when equal, 1 when this is smaller
71 * and -1 when bigger -- sorts descending
73 Int_t Compare( const TObject* obj) const;
76 /** Defines this class as being sortable in a TCollection
77 * @return always kTRUE;
79 Bool_t IsSortable() const { return kTRUE; }
82 // coordinate system conversions
83 Bool_t Local2GlobalMomentum(Double_t p[3], Double_t alpha) const;
84 Bool_t Local2GlobalPosition(Double_t r[3], Double_t alpha) const;
85 Bool_t Global2LocalMomentum(Double_t p[3], Short_t charge, Double_t &alpha) const;
86 Bool_t Global2LocalPosition(Double_t r[3], Double_t alpha) const;
90 Int_t fPoolID; //! id of position in the pool
92 ClassDef(AliVParticle, 4) // base class for particles