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c04e3238 | 1 | #ifndef ALIMUONTRACKEXTRAP_H |
2 | #define ALIMUONTRACKEXTRAP_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 | // Revision of includes 07/05/2004 | |
8 | ||
9 | /// \ingroup rec | |
10 | /// \class AliMUONTrackExtrap | |
11 | /// \brief Track parameters in ALICE dimuon spectrometer | |
12 | /// | |
13 | ////////////////////////////////////////////////////////////// | |
14 | /// Tools for track extrapolation in ALICE dimuon spectrometer | |
15 | ////////////////////////////////////////////////////////////// | |
16 | ||
17 | #include <TObject.h> | |
18 | ||
19 | class AliMagF; | |
20 | class AliMUONTrackParam; | |
21 | ||
22 | class AliMUONTrackExtrap : public TObject | |
23 | { | |
24 | public: | |
25 | /// Constructor | |
26 | AliMUONTrackExtrap() : TObject(){}; | |
27 | /// Destructor | |
28 | virtual ~AliMUONTrackExtrap(){}; | |
29 | ||
30 | /// set field map | |
31 | static void SetField(const AliMagF* magField) {fgkField = magField;} | |
32 | ||
33 | static void ExtrapToZ(AliMUONTrackParam *trackParam, Double_t Z); | |
34 | static void ExtrapToStation(AliMUONTrackParam *trackParamIn, Int_t station, AliMUONTrackParam *trackParamOut); | |
35 | static void ExtrapToVertex(AliMUONTrackParam *trackParam, Double_t xVtx, Double_t yVtx, Double_t zVtx); | |
36 | ||
37 | static void ExtrapOneStepRungekutta(Double_t charge, Double_t step, Double_t* vect, Double_t* vout); | |
38 | ||
39 | ||
40 | private: | |
41 | static const AliMagF* fgkField; //!< field map | |
42 | ||
43 | // Functions | |
44 | AliMUONTrackExtrap(const AliMUONTrackExtrap& trackExtrap); | |
45 | AliMUONTrackExtrap& operator=(const AliMUONTrackExtrap& trackExtrap); | |
46 | ||
47 | static void SetGeant3ParametersFromTrackParam(AliMUONTrackParam* trackParam, Double_t *vGeant3, Double_t forwardBackward); | |
48 | static void SetTrackParamFromGeant3Parameters(Double_t *vGeant3, Double_t Charge, AliMUONTrackParam* trackParam); | |
49 | ||
50 | static void BransonCorrection(AliMUONTrackParam *trackParam, Double_t xVtx, Double_t yVtx, Double_t zVtx); | |
51 | static Double_t TotalMomentumEnergyLoss(Double_t thetaLimit, Double_t pTotal, Double_t theta); | |
52 | static void FieldCorrection(AliMUONTrackParam *trackParam, Double_t Z); | |
53 | ||
54 | static void ExtrapOneStepHelix(Double_t charge, Double_t step, Double_t *vect, Double_t *vout); | |
55 | static void ExtrapOneStepHelix3(Double_t field, Double_t step, Double_t *vect, Double_t *vout); | |
56 | ||
57 | static void GetField(Double_t *Position, Double_t *Field); | |
58 | ||
59 | ClassDef(AliMUONTrackExtrap, 0) // Tools for track extrapolation in ALICE dimuon spectrometer | |
60 | }; | |
61 | ||
62 | #endif |