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[u/mrichter/AliRoot.git] / STEER / AliTrackReference.h
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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 17class AliExternalTrackParam;
18
aab9c8d5 19class AliTrackReference : public TObject {
2d74ba4f 20
aab9c8d5 21public:
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);}
aab9c8d5 47 virtual void SetPosition(Float_t x, Float_t y, Float_t z){fX=x; fY=y; fZ=z;}
48 virtual void SetMomentum(Float_t px, Float_t py, Float_t pz){fPx=px; fPy=py; fPz=pz;}
2d74ba4f 49
9c9d2487 50 // Methods to get position of the track reference in
51 // in the TPC/TRD/TOF Tracking coordinate system
52
53 virtual Float_t PhiPos() const {return TMath::Pi()+TMath::ATan2(-fY, -fX);}
54 virtual Float_t Alpha() const
55 {return TMath::Pi()*(20*((((Int_t)(PhiPos()*180/TMath::Pi()))/20))+10)/180.;}
56 virtual Float_t LocalX() const {return fX*TMath::Cos(-Alpha()) - fY*TMath::Sin(-Alpha());}
57 virtual Float_t LocalY() const {return fX*TMath::Sin(-Alpha()) + fY*TMath::Cos(-Alpha());}
58
2d74ba4f 59
aab9c8d5 60protected:
61 Int_t fTrack; // Track number
62 Float_t fX; // X reference position of the track
63 Float_t fY; // Y reference position of the track
64 Float_t fZ; // Z reference position of the track
65 Float_t fPx; // momentum
66 Float_t fPy; // momentum
67 Float_t fPz; // momentum
2d74ba4f 68 Float_t fLength; // track lenght from its origin in cm
69 Float_t fTime; // time of flight in cm
aab9c8d5 70
14f9f6b4 71 ClassDef(AliTrackReference,3) //Base class for all Alice track references
aab9c8d5 72};
73#endif