Modificaions from Stefan Rossegger :
[u/mrichter/AliRoot.git] / TRD / AliTRDgtuParam.h
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52c19022 1#ifndef ALITRDGTUPARAM_H
2#define ALITRDGTUPARAM_H
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6/* $Id: AliTRDgtuParam.h 27496 2008-07-22 08:35:45Z cblume $ */
7
8// --------------------------------------------------------
9//
10// Singleton class to hold the parameters steering the GTU
11// tracking
12//
13// --------------------------------------------------------
14
15#include "TObject.h"
52c19022 16
17class AliTRDgeometry;
18
19class AliTRDgtuParam : public TObject {
20 public:
21 virtual ~AliTRDgtuParam();
22
23 static AliTRDgtuParam *Instance(); // Singleton
24 static void Terminate();
25
36dc3337 26 static Int_t GetNLinks() { return fgkNLinks; }
27 static Int_t GetNLayers() { return fgkNLinks/2; }
28 static Int_t GetNZChannels() { return fgkNZChannels; }
29 static Int_t GetNRefLayers() { return fgkNRefLayers; }
52c19022 30
36dc3337 31 static Float_t GetChamberThickness() { return 3.0; }
52c19022 32
33 // ----- Bin widths (granularity) -----
36dc3337 34 static Float_t GetBinWidthY() { return fgkBinWidthY; }
35 static Float_t GetBinWidthdY() { return fgkBinWidthdY; }
52c19022 36
37 // ----- Bit Widths (used for internal representation) -----
36dc3337 38 static Int_t GetBitWidthY() { return fgkBitWidthY; }
39 static Int_t GetBitWidthdY() { return fgkBitWidthdY; }
40 static Int_t GetBitWidthYProj() { return fgkBitWidthYProj; }
41 static Int_t GetBitExcessY() { return fgkBitExcessY; }
42 static Int_t GetBitExcessAlpha() { return fgkBitExcessAlpha; }
43 static Int_t GetBitExcessYProj() { return fgkBitExcessYProj; }
52c19022 44
45 AliTRDgeometry* GetGeo() const { return fGeo; }
46 Float_t GetVertexSize() const { return fVertexSize; }
47 Int_t GetCiAlpha(Int_t layer) const;
48 Int_t GetCiYProj(Int_t layer) const;
49 Int_t GetYt(Int_t stack, Int_t layer, Int_t zrow) const;
2cf67435 50 Int_t GetDeltaY() const { return fgDeltaY; }
51 Int_t GetDeltaAlpha() const { return fgDeltaAlpha; }
52c19022 52 Int_t GetZSubchannel(Int_t stack, Int_t layer, Int_t zchannel, Int_t zpos) const;
53 Int_t GetRefLayer(Int_t refLayerIdx) const;
54// Bool_t GetFitParams(TVectorD &rhs, Int_t k); // const
55 Bool_t GetIntersectionPoints(Int_t k, Float_t &x1, Float_t &x2); // const
b491d23b 56 Float_t GetPt(Int_t a, Float_t b, Float_t x1, Float_t x2) const;
52c19022 57
58 Bool_t IsInZChannel(Int_t stack, Int_t layer, Int_t zchannel, Int_t zpos) const;
59
60 void SetVertexSize(Float_t vertexsize) { fVertexSize = vertexsize; }
61
2cf67435 62 static void SetDeltaY(Int_t dy) { fgDeltaY = dy; }
63 static void SetDeltaAlpha(Int_t da) { fgDeltaAlpha = da; }
64
52c19022 65 // z-channel map
36dc3337 66 Int_t GenerateZChannelMap(); // could have different modes (for beam-beam, cosmics, ...)
52c19022 67 Bool_t DisplayZChannelMap(Int_t zchannel = -1, Int_t subch = 0) const;
68
69 // variables for pt-reconstruction (not used at the moment)
70 Bool_t GenerateRecoCoefficients(Int_t trackletMask);
71 Float_t GetAki(Int_t k, Int_t i);
72 Float_t GetBki(Int_t k, Int_t i);
73 Float_t GetCki(Int_t k, Int_t i);
74// Float_t GetD(Int_t k) const;
75
b491d23b 76 // B-field
77 void SetMagField(Float_t field) { fMagField = field; }
78 Float_t GetMagField() const { return fMagField; }
79
52c19022 80 protected:
81 static const Int_t fgkNZChannels = 3; // No. of z-channels
82 static const Int_t fgkNLinks = 12; // No. of links
83 static const Int_t fgkFixLayer = 2; // which layer is fixed for the generation of the z-channel map
2cf67435 84 static Int_t fgDeltaY; // accepted deviation in y_proj, default: 9
85 static Int_t fgDeltaAlpha; // accepted deviation in alpha, default: 11
52c19022 86 static const Int_t fgkNRefLayers = 3; // no. of reference layers
87
4cc89512 88 static const Float_t fgkBinWidthY; // bin width for y-position
89 static const Float_t fgkBinWidthdY; // bin width for deflection length
90
91 static const Int_t fgkBitWidthY; // bit width for y-position
92 static const Int_t fgkBitWidthdY; // bit width for deflection length
93 static const Int_t fgkBitWidthYProj; // bit width for projected y-position
94 static const Int_t fgkBitExcessY; // excess bits for y-position
95 static const Int_t fgkBitExcessAlpha; // excess bits for alpha
96 static const Int_t fgkBitExcessYProj; // excess bits for projected y-position
52c19022 97
98 Float_t fVertexSize; // assumed vertex size (z-dir.) for the z-channel map
99
100 Int_t fZChannelMap[5][16][6][16]; // must be changed
101 Int_t fZSubChannel[5][fgkNZChannels][6][16]; // must be changed
102
4cc89512 103 Int_t fCurrTrackletMask; // current tracklet mask for which the coefficients have been calculated
104 Float_t fAki[6]; // coefficients used for the fit, calculated for the current tracklet mask
105 Float_t fBki[6]; // coefficients used for the fit, calculated for the current tracklet mask
106 Float_t fCki[6]; // coefficients used for the fit, calculated for the current tracklet mask
52c19022 107
108 Int_t *fRefLayers; //[fgkNRefLayers] reference layers for track finding
109
b491d23b 110 Float_t fMagField; // magnetic field in T
111
52c19022 112 AliTRDgeometry *fGeo; //! pointer to the TRD geometry
113
114 static AliTRDgtuParam *fgInstance; // instance pointer
115
116 private:
117 AliTRDgtuParam(); // instance only via Instance()
118 AliTRDgtuParam(const AliTRDgtuParam &rhs); // not implemented
119 AliTRDgtuParam& operator=(const AliTRDgtuParam &rhs); // not implemented
120
121 ClassDef(AliTRDgtuParam, 1);
122};
123
124#endif