Merge with TRDdev.2.0
[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// --------------------------------------------------------
5f006bd7 9//
10// Singleton class to hold the parameters steering the GTU
52c19022 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
52c19022 24
36dc3337 25 static Int_t GetNLinks() { return fgkNLinks; }
26 static Int_t GetNLayers() { return fgkNLinks/2; }
27 static Int_t GetNZChannels() { return fgkNZChannels; }
28 static Int_t GetNRefLayers() { return fgkNRefLayers; }
52c19022 29
36dc3337 30 static Float_t GetChamberThickness() { return 3.0; }
52c19022 31
32 // ----- Bin widths (granularity) -----
36dc3337 33 static Float_t GetBinWidthY() { return fgkBinWidthY; }
34 static Float_t GetBinWidthdY() { return fgkBinWidthdY; }
52c19022 35
36 // ----- Bit Widths (used for internal representation) -----
36dc3337 37 static Int_t GetBitWidthY() { return fgkBitWidthY; }
38 static Int_t GetBitWidthdY() { return fgkBitWidthdY; }
39 static Int_t GetBitWidthYProj() { return fgkBitWidthYProj; }
40 static Int_t GetBitExcessY() { return fgkBitExcessY; }
41 static Int_t GetBitExcessAlpha() { return fgkBitExcessAlpha; }
42 static Int_t GetBitExcessYProj() { return fgkBitExcessYProj; }
52c19022 43
ec5db61b 44 Float_t GetInnerPadLength(Int_t stack, Int_t layer) const {
45 return (stack == 2) ? 9. : fgkInnerPadLength[layer];
46 }
47 Float_t GetOuterPadLength(Int_t stack, Int_t layer) const {
48 return (stack == 2) ? 8. : fgkOuterPadLength[layer];
49 }
50 Float_t GetZrow(Int_t stack, Int_t layer, Int_t padrow) const {
51 Float_t zRowCorrected = fgkRow0Pos[layer][stack] - GetOuterPadLength(stack, layer) + GetInnerPadLength(stack, layer);
52 return zRowCorrected - (0.5 + padrow) * GetInnerPadLength(stack, layer);
53 }
54
52c19022 55 AliTRDgeometry* GetGeo() const { return fGeo; }
56 Float_t GetVertexSize() const { return fVertexSize; }
57 Int_t GetCiAlpha(Int_t layer) const;
58 Int_t GetCiYProj(Int_t layer) const;
59 Int_t GetYt(Int_t stack, Int_t layer, Int_t zrow) const;
2cf67435 60 Int_t GetDeltaY() const { return fgDeltaY; }
61 Int_t GetDeltaAlpha() const { return fgDeltaAlpha; }
52c19022 62 Int_t GetZSubchannel(Int_t stack, Int_t layer, Int_t zchannel, Int_t zpos) const;
d2c8b010 63 static Int_t GetRefLayer(Int_t refLayerIdx);
52c19022 64// Bool_t GetFitParams(TVectorD &rhs, Int_t k); // const
65 Bool_t GetIntersectionPoints(Int_t k, Float_t &x1, Float_t &x2); // const
d2c8b010 66 static Int_t GetPt(Int_t layerMask, Int_t a, Float_t b, Float_t x1, Float_t x2, Float_t magField);
52c19022 67
68 Bool_t IsInZChannel(Int_t stack, Int_t layer, Int_t zchannel, Int_t zpos) const;
69
70 void SetVertexSize(Float_t vertexsize) { fVertexSize = vertexsize; }
71
2cf67435 72 static void SetDeltaY(Int_t dy) { fgDeltaY = dy; }
73 static void SetDeltaAlpha(Int_t da) { fgDeltaAlpha = da; }
74
44eafcf2 75 static void SetUseGTUconst(Bool_t b) { fgUseGTUconst = b; }
76 static Bool_t GetUseGTUconst() { return fgUseGTUconst; }
77
ec5db61b 78 static void SetUseGTUmerge(Bool_t b) { fgUseGTUmerge = b; }
79 static Bool_t GetUseGTUmerge() { return fgUseGTUmerge; }
80
81 static void SetLimitNoTracklets(Bool_t b) { fgLimitNoTracklets = b; }
82 static Bool_t GetLimitNoTracklets() { return fgLimitNoTracklets; }
83
a3461d38 84 static void SetMaxNoTracklets(Int_t max) { fgMaxNoTracklets = max; }
85 static Int_t GetMaxNoTracklets() { return fgMaxNoTracklets; }
86
52c19022 87 // z-channel map
36dc3337 88 Int_t GenerateZChannelMap(); // could have different modes (for beam-beam, cosmics, ...)
52c19022 89 Bool_t DisplayZChannelMap(Int_t zchannel = -1, Int_t subch = 0) const;
90
91 // variables for pt-reconstruction (not used at the moment)
92 Bool_t GenerateRecoCoefficients(Int_t trackletMask);
ec5db61b 93 Int_t GetAki(Int_t k, Int_t i);
52c19022 94 Float_t GetBki(Int_t k, Int_t i);
95 Float_t GetCki(Int_t k, Int_t i);
96// Float_t GetD(Int_t k) const;
97
b491d23b 98 // B-field
99 void SetMagField(Float_t field) { fMagField = field; }
100 Float_t GetMagField() const { return fMagField; }
101
52c19022 102 static const Int_t fgkNZChannels = 3; // No. of z-channels
103 static const Int_t fgkNLinks = 12; // No. of links
104 static const Int_t fgkFixLayer = 2; // which layer is fixed for the generation of the z-channel map
52c19022 105 static const Int_t fgkNRefLayers = 3; // no. of reference layers
106
4cc89512 107 static const Float_t fgkBinWidthY; // bin width for y-position
108 static const Float_t fgkBinWidthdY; // bin width for deflection length
109
110 static const Int_t fgkBitWidthY; // bit width for y-position
111 static const Int_t fgkBitWidthdY; // bit width for deflection length
112 static const Int_t fgkBitWidthYProj; // bit width for projected y-position
113 static const Int_t fgkBitExcessY; // excess bits for y-position
114 static const Int_t fgkBitExcessAlpha; // excess bits for alpha
115 static const Int_t fgkBitExcessYProj; // excess bits for projected y-position
5f006bd7 116
ec5db61b 117 static const Int_t fgkPtInfinity; // infinite pt as obtained when a == 0
118
44eafcf2 119 protected:
120 static Int_t fgDeltaY; // accepted deviation in y_proj, default: 9
121 static Int_t fgDeltaAlpha; // accepted deviation in alpha, default: 11
122
d2c8b010 123 static Int_t fgRefLayers[3]; // reference layers for track finding
124
44eafcf2 125 static Bool_t fgUseGTUconst; // use constants as in the GTU for the calculations
126 // instead of geometry derived quantities
ec5db61b 127 static Bool_t fgUseGTUmerge; // use merge algorithm exactly as in hardware
128 static Bool_t fgLimitNoTracklets; // limit the number of tracklets per layer
a3461d38 129 static Int_t fgMaxNoTracklets; // max number of tracklets per layer if limited
44eafcf2 130 static const Bool_t fgZChannelMap[5][16][6][16]; // z-channel tables as in GTU
ec5db61b 131 static const Float_t fgkRadius[6]; // layer radius as used in the GTU code
132 static const Float_t fgkThickness; // drift length as used in the GTU code
133 static const Float_t fgkRow0Pos[6][5]; // geometry constant from GTU implementation
134 static const Float_t fgkInnerPadLength[6]; // geometry constant from GTU implementation
135 static const Float_t fgkOuterPadLength[6]; // geometry constant from GTU implementation
136 static const Float_t fgkAcoeff[32][6]; // geometry constant from GTU implementation
137 static const Int_t fgkMaskID[64]; // geometry constant from GTU implementation
44eafcf2 138
52c19022 139 Float_t fVertexSize; // assumed vertex size (z-dir.) for the z-channel map
140
141 Int_t fZChannelMap[5][16][6][16]; // must be changed
142 Int_t fZSubChannel[5][fgkNZChannels][6][16]; // must be changed
143
4cc89512 144 Int_t fCurrTrackletMask; // current tracklet mask for which the coefficients have been calculated
145 Float_t fAki[6]; // coefficients used for the fit, calculated for the current tracklet mask
146 Float_t fBki[6]; // coefficients used for the fit, calculated for the current tracklet mask
147 Float_t fCki[6]; // coefficients used for the fit, calculated for the current tracklet mask
52c19022 148
b491d23b 149 Float_t fMagField; // magnetic field in T
150
52c19022 151 AliTRDgeometry *fGeo; //! pointer to the TRD geometry
152
52c19022 153 private:
154 AliTRDgtuParam(); // instance only via Instance()
155 AliTRDgtuParam(const AliTRDgtuParam &rhs); // not implemented
156 AliTRDgtuParam& operator=(const AliTRDgtuParam &rhs); // not implemented
157
158 ClassDef(AliTRDgtuParam, 1);
159};
160
161#endif