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aab9c8d5 | 1 | #ifndef ALITRACKREFERENCE_H |
2 | #define ALITRACKREFERENCE_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | /* $Id$ */ | |
7 | ||
0742d588 | 8 | // |
9 | // Track Reference object is created every time particle is | |
10 | // crossing detector bounds. | |
11 | // The object is created by Step Manager | |
12 | // | |
13 | ||
aab9c8d5 | 14 | #include "TObject.h" |
2cad796f | 15 | #include "TMath.h" |
aab9c8d5 | 16 | |
ac3eaff4 | 17 | class AliExternalTrackParam; |
18 | ||
aab9c8d5 | 19 | class AliTrackReference : public TObject { |
2d74ba4f | 20 | |
aab9c8d5 | 21 | public: |
2d74ba4f | 22 | |
aab9c8d5 | 23 | AliTrackReference(); |
2cad796f | 24 | AliTrackReference(Int_t label); |
aab9c8d5 | 25 | virtual ~AliTrackReference() {} |
2d74ba4f | 26 | |
ac3eaff4 | 27 | static AliExternalTrackParam * MakeTrack(const AliTrackReference *ref, Double_t mass); |
aab9c8d5 | 28 | virtual Int_t GetTrack() const {return fTrack;} |
29 | virtual void SetTrack(Int_t track) {fTrack=track;} | |
4930c251 | 30 | virtual void SetLength(Float_t length){fLength=length;} |
2d74ba4f | 31 | virtual void SetTime(Float_t time) {fTime = time;} |
1c0b669a | 32 | virtual Float_t GetLength() const {return fLength;} |
33 | virtual Float_t GetTime() const {return fTime;} | |
84856b02 | 34 | virtual Int_t Label() const {return fTrack;} |
35 | virtual void SetLabel(Int_t track) {fTrack=track;} | |
36 | virtual Float_t R() const {return TMath::Sqrt(fX*fX+fY*fY);} | |
37 | virtual Float_t Pt() const {return TMath::Sqrt(fPx*fPx+fPy*fPy);} | |
38 | virtual Float_t Phi() const {return TMath::Pi()+TMath::ATan2(-fPy,-fPx);} | |
b915b099 | 39 | virtual Float_t Theta() const {return (fPz==0)?TMath::Pi()/2:TMath::ACos(fPz/P());} |
aab9c8d5 | 40 | virtual Float_t X() const {return fX;} |
41 | virtual Float_t Y() const {return fY;} | |
42 | virtual Float_t Z() const {return fZ;} | |
43 | virtual Float_t Px() const {return fPx;} | |
44 | virtual Float_t Py() const {return fPy;} | |
45 | virtual Float_t Pz() const {return fPz;} | |
b915b099 | 46 | virtual Float_t P() const {return TMath::Sqrt(fPx*fPx+fPy*fPy+fPz*fPz);} |
3142ebc3 | 47 | virtual Int_t UserId() const {return fUserId;} |
aab9c8d5 | 48 | virtual void SetPosition(Float_t x, Float_t y, Float_t z){fX=x; fY=y; fZ=z;} |
49 | virtual void SetMomentum(Float_t px, Float_t py, Float_t pz){fPx=px; fPy=py; fPz=pz;} | |
3142ebc3 | 50 | virtual void SetUserId(Int_t userId){fUserId=userId;} |
2d74ba4f | 51 | |
9c9d2487 | 52 | // Methods to get position of the track reference in |
53 | // in the TPC/TRD/TOF Tracking coordinate system | |
54 | ||
55 | virtual Float_t PhiPos() const {return TMath::Pi()+TMath::ATan2(-fY, -fX);} | |
56 | virtual Float_t Alpha() const | |
57 | {return TMath::Pi()*(20*((((Int_t)(PhiPos()*180/TMath::Pi()))/20))+10)/180.;} | |
58 | virtual Float_t LocalX() const {return fX*TMath::Cos(-Alpha()) - fY*TMath::Sin(-Alpha());} | |
59 | virtual Float_t LocalY() const {return fX*TMath::Sin(-Alpha()) + fY*TMath::Cos(-Alpha());} | |
60 | ||
2d74ba4f | 61 | |
aab9c8d5 | 62 | protected: |
63 | Int_t fTrack; // Track number | |
64 | Float_t fX; // X reference position of the track | |
65 | Float_t fY; // Y reference position of the track | |
66 | Float_t fZ; // Z reference position of the track | |
67 | Float_t fPx; // momentum | |
68 | Float_t fPy; // momentum | |
69 | Float_t fPz; // momentum | |
2d74ba4f | 70 | Float_t fLength; // track lenght from its origin in cm |
71 | Float_t fTime; // time of flight in cm | |
3142ebc3 | 72 | Int_t fUserId; // optional Id defined by user |
aab9c8d5 | 73 | |
3142ebc3 | 74 | ClassDef(AliTrackReference,4) //Base class for all Alice track references |
aab9c8d5 | 75 | }; |
76 | #endif |