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1#ifndef ALIPHOSGEOMETRY_H
2#define ALIPHOSGEOMETRY_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
8//_________________________________________________________________________
9// Geometry class for PHOS : singleton
10// PHOS consists of the electromagnetic calorimeter (EMCA)
11// and a charged particle veto either in the Subatech's version (PPSD)
12// or in the IHEP's one (CPV).
13// The EMCA/PPSD/CPV modules are parametrized so that any configuration
14// can be easily implemented
15// The title is used to identify the version of CPV used.
16//
17//*-- Author: Yves Schutz (SUBATECH)
18
19#include <assert.h>
20
21// --- ROOT system ---
22
23#include "TString.h"
24#include "TObjArray.h"
25#include "TParticle.h"
26#include "TVector3.h"
27
28// --- AliRoot header files ---
29
30#include "AliGeometry.h"
31
32#include "AliPHOSEMCAGeometry.h"
33#include "AliPHOSCPVGeometry.h"
34#include "AliPHOSSupportGeometry.h"
35
36
37class AliPHOSGeometry : public AliGeometry {
38
39public:
40
41 AliPHOSGeometry() {
42 // default ctor
43 // must be kept public for root persistency purposes, but should never be called by the outside world
44 fPHOSAngle = 0 ;
45 fGeometryEMCA = 0;
46 fGeometrySUPP = 0;
47 fGeometryCPV = 0;
48 fgGeom = 0;
49 fRotMatrixArray = 0; }
50
51 AliPHOSGeometry(const AliPHOSGeometry & geom) {
52 // cpy ctor requested by Coding Convention but not yet needed
53
54 assert(0==1) ;
55 }
56
57 virtual ~AliPHOSGeometry(void) ;
58 static AliPHOSGeometry * GetInstance(const Text_t* name, const Text_t* title="") ;
59 static AliPHOSGeometry * GetInstance() ;
60 virtual void GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat) const ;
61 virtual void GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const ;
62 virtual Bool_t Impact(const TParticle * particle) const ;
63
64 AliPHOSGeometry & operator = (const AliPHOSGeometry & rvalue) const {
65 // assignement operator requested by coding convention but not needed
66 assert(0==1) ;
67 return *(GetInstance()) ;
68 }
69
70 // General
71
72 static TString Degre(void) { return TString("deg") ; } // a global for degree (deg)
73
74 static TString Radian(void){ return TString("rad") ; } // a global for radian (rad)
75
76 Bool_t AbsToRelNumbering(const Int_t AbsId, Int_t * RelId) const ;
77 // converts the absolute PHOS numbering to a relative
78
79 void EmcModuleCoverage(const Int_t m, Double_t & tm, Double_t & tM, Double_t & pm,
80 Double_t & pM, Option_t * opt = Radian() ) const ;
81 // calculates the angular coverage in theta and phi of a EMC module
82 void EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt = Radian() ) const ;
83 // calculates the angular coverage in theta and phi of a
84 // single crystal in a EMC module
85 void ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber,
86 Double_t & z, Double_t & x) const ;
87 // calculates the impact coordinates of a neutral particle
88 // emitted in direction theta and phi in ALICE
89 Bool_t IsInEMC(const Int_t id) const { if (id > GetNModules() * GetNCristalsInModule() ) return kFALSE; return kTRUE; }
90 void RelPosInModule(const Int_t * RelId, Float_t & y, Float_t & z) const ;
91 // gets the position of element (pad or Xtal) relative to
92 // center of PHOS module
93 void RelPosInAlice(const Int_t AbsId, TVector3 & pos) const ;
94 // gets the position of element (pad or Xtal) relative to Alice
95 Bool_t RelToAbsNumbering(const Int_t * RelId, Int_t & AbsId) const ;
96 // converts the absolute PHOS numbering to a relative
97
98 Bool_t IsInitialized(void) const { return fgInit ; }
99
100 // Return general PHOS parameters
101 Int_t GetNModules(void) const { return fNModules ; }
102 Float_t GetPHOSAngle(Int_t index) const { return fPHOSAngle[index-1] ; }
103 Float_t* GetPHOSParams(void) { return fPHOSParams;} //Half-sizes of PHOS trapecoid
104 Float_t GetIPtoUpperCPVsurface(void) const { return fIPtoUpperCPVsurface ; }
105 Float_t GetOuterBoxSize(Int_t index) const { return 2.*fPHOSParams[index]; }
106 Float_t GetCrystalSize(Int_t index) const { return fGeometryEMCA->GetCrystalSize(index) ; }
107 Float_t GetCellStep(void) const { return 2*(fGeometryEMCA->GetAirCellHalfSize()[0] +
108 fGeometryEMCA->GetStripWallWidthOut()) ;}
109
110 // Return EMCA geometry parameters
111
112 AliPHOSEMCAGeometry * GetEMCAGeometry() const {return fGeometryEMCA ;}
113 Float_t GetIPtoCrystalSurface(void) const { return fGeometryEMCA->GetIPtoCrystalSurface() ; }
114 Float_t GetIPtoOuterCoverDistance(void) const { return fGeometryEMCA->GetIPtoOuterCoverDistance() ; }
115 Int_t GetNPhi(void) const { return fGeometryEMCA->GetNPhi() ; }
116 Int_t GetNZ(void) const { return fGeometryEMCA->GetNZ() ; }
117 Int_t GetNCristalsInModule(void) const { return fGeometryEMCA->GetNPhi() * fGeometryEMCA->GetNZ() ; }
118
119 // Return CPV geometry parameters
120 Int_t GetNumberOfCPVLayers(void) const { return fGeometryCPV ->GetNumberOfCPVLayers(); }
121 Float_t GetCPVActiveSize(Int_t index) const { return fGeometryCPV->GetCPVActiveSize(index); }
122 Int_t GetNumberOfCPVChipsPhi(void) const { return fGeometryCPV->GetNumberOfCPVChipsPhi(); }
123 Int_t GetNumberOfCPVChipsZ(void) const { return fGeometryCPV->GetNumberOfCPVChipsZ(); }
124 Int_t GetNumberOfCPVPadsPhi(void) const { return fGeometryCPV->GetNumberOfCPVPadsPhi(); }
125 Int_t GetNumberOfCPVPadsZ(void) const { return fGeometryCPV->GetNumberOfCPVPadsZ(); }
126 Float_t GetPadSizePhi(void) const { return fGeometryCPV->GetCPVPadSizePhi(); }
127 Float_t GetPadSizeZ(void) const { return fGeometryCPV->GetCPVPadSizeZ(); }
128 Float_t GetGassiplexChipSize(Int_t index) const { return fGeometryCPV->GetGassiplexChipSize(index); }
129 Float_t GetCPVGasThickness(void) const { return fGeometryCPV->GetCPVGasThickness(); }
130 Float_t GetCPVTextoliteThickness(void) const { return fGeometryCPV->GetCPVTextoliteThickness(); }
131 Float_t GetCPVCuNiFoilThickness(void) const { return fGeometryCPV->GetCPVCuNiFoilThickness(); }
132 Float_t GetFTPosition(Int_t index) const { return fGeometryCPV->GetFTPosition(index); }
133 Float_t GetCPVFrameSize(Int_t index) const { return fGeometryCPV->GetCPVFrameSize(index); }
134 Float_t GetCPVBoxSize(Int_t index) const { return fGeometryCPV ->GetCPVBoxSize(index); }
135 Float_t GetIPtoCPVDistance(void) const { return GetIPtoOuterCoverDistance() -
136 GetCPVBoxSize(1) - 1.0; }
137
138 // Return PHOS' support geometry parameters
139
140 Float_t GetRailOuterSize(Int_t index) const { return fGeometrySUPP->GetRailOuterSize(index); }
141 Float_t GetRailPart1 (Int_t index) const { return fGeometrySUPP->GetRailPart1 (index); }
142 Float_t GetRailPart2 (Int_t index) const { return fGeometrySUPP->GetRailPart2 (index); }
143 Float_t GetRailPart3 (Int_t index) const { return fGeometrySUPP->GetRailPart3 (index); }
144 Float_t GetRailPos (Int_t index) const { return fGeometrySUPP->GetRailPos (index); }
145 Float_t GetRailLength (void) const { return fGeometrySUPP->GetRailLength (); }
146 Float_t GetDistanceBetwRails(void) const { return fGeometrySUPP->GetDistanceBetwRails(); }
147 Float_t GetRailsDistanceFromIP(void) const { return fGeometrySUPP->GetRailsDistanceFromIP();}
148 Float_t GetRailRoadSize (Int_t index) const { return fGeometrySUPP->GetRailRoadSize (index); }
149 Float_t GetCradleWallThickness(void) const { return fGeometrySUPP->GetCradleWallThickness();}
150 Float_t GetCradleWall (Int_t index) const { return fGeometrySUPP->GetCradleWall (index); }
151 Float_t GetCradleWheel (Int_t index) const { return fGeometrySUPP->GetCradleWheel (index); }
152
153protected:
154
155 AliPHOSGeometry(const Text_t* name, const Text_t* title="") : AliGeometry(name, title) {
156 // ctor only for internal usage (singleton)
157 Init() ;
158 }
159 void Init(void) ; // steering method for PHOS and PPSD/CPV
160
161private:
162
163 Int_t fNModules ; // Number of modules constituing PHOS
164 Float_t fAngle ; // Position angles between modules
165 Float_t *fPHOSAngle ; //[fNModules] Position angles of modules
166 Float_t fPHOSParams[4] ; // Half-sizes of PHOS trapecoid
167 Float_t fIPtoUpperCPVsurface; // Minimal distance from IP to PHOS
168 TObjArray *fRotMatrixArray ; // Liste of rotation matrices (one per phos module)
169 AliPHOSEMCAGeometry *fGeometryEMCA ; // Geometry object for Electromagnetic calorimeter
170 AliPHOSCPVGeometry *fGeometryCPV ; // Geometry object for CPV (IHEP)
171 AliPHOSSupportGeometry *fGeometrySUPP ; // Geometry object for PHOS support
172
173 void SetPHOSAngles(); // calculates the PHOS modules PHI angle
174
175 static AliPHOSGeometry * fgGeom ; // pointer to the unique instance of the singleton
176 static Bool_t fgInit ; // Tells if geometry has been succesfully set up
177
178 ClassDef(AliPHOSGeometry,1) // PHOS geometry class
179
180} ;
181
182#endif // AliPHOSGEOMETRY_H