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[u/mrichter/AliRoot.git] / EMCAL / AliEMCALGeometry.h
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2012850d 1#ifndef ALIEMCALGEOMETRY_H
2#define ALIEMCALGEOMETRY_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 EMCAL : singleton
b13bbe81 10// EMCAL consists of a layers of scintillator, and lead.
2012850d 11//
b13bbe81 12//*-- Author: Sahal Yacoob (LBL / UCT)
13//*-- and : Yves Schutz (Subatech)
ca8f5bd0 14
2012850d 15#include <assert.h>
16
17// --- ROOT system ---
b13bbe81 18#include "TString.h"
19#include "TObjArray.h"
20#include "TVector3.h"
2012850d 21
2012850d 22// --- AliRoot header files ---
23
24#include "AliGeometry.h"
25
26
27class AliEMCALGeometry : public AliGeometry {
ca8f5bd0 28 public:
29 AliEMCALGeometry() {
30 // default ctor, must be kept public for root persistency purposes,
31 // but should never be called by the outside world
32 };
33 AliEMCALGeometry(const AliEMCALGeometry & geom) {
34 // cpy ctor requested by Coding Convention but not yet needed
35 assert(0==1);
36 };
37 virtual ~AliEMCALGeometry(void) ;
38 static AliEMCALGeometry * GetInstance(const Text_t* name,
39 const Text_t* title="") ;
40 static AliEMCALGeometry * GetInstance() ;
41 AliEMCALGeometry & operator = (const AliEMCALGeometry & rvalue) const {
42 // assignement operator requested by coding convention but not needed
43 assert(0==1) ;
44 return *(GetInstance()) ;
45 };
46 virtual void GetGlobal(const AliRecPoint *, TVector3 &, TMatrix &) const {}
47 virtual void GetGlobal(const AliRecPoint *, TVector3 &) const {}
48 // General
49 Bool_t IsInitialized(void) const { return fgInit ; }
50 // Return EMCA geometrical parameters
51 // geometry
52 const Float_t GetAirGap() const { return fAirGap ; }
53 const Float_t GetArm1PhiMin() const { return fArm1PhiMin ; }
54 const Float_t GetArm1PhiMax() const { return fArm1PhiMax ; }
55 const Float_t GetIPDistance() const { return fIPDistance ; }
56 const Float_t GetEnvelop(Int_t index) const { return fEnvelop[index] ; }
57 const Float_t GetShellThickness() const { return fShellThickness ; }
58 const Float_t GetZLength() const { return fZLength ; }
59 const Float_t GetGap2Active() const {return fGap2Active ; }
60 const Int_t GetNLayers() const {return fNLayers ;}
61 const Int_t GetNZ() const {return fNZ ;}
62 const Int_t GetNPhi() const {return fNPhi ;}
63 Int_t TowerIndex(Int_t iz,Int_t iphi,Int_t ipre); // returns tower index
64 // returns tower indexs iz, iphi.
65 void TowerIndexes(Int_t index,Int_t &iz,Int_t &iphi,Int_t &ipre);
66 // for a given tower index it returns eta and phi of center of that tower.
67 void EtaPhiFromIndex(Int_t index,Float_t &eta,Float_t &phi);
68 // for a given eta and phi in the EMCAL it returns the tower index.
69 Int_t TowerIndexFromEtaPhi(Float_t eta,Float_t phi);
70 // for a given eta and phi in the EMCAL it returns the pretower index.
71 Int_t PreTowerIndexFromEtaPhi(Float_t eta,Float_t phi);
72 // Returns theta and phi (degree) for a given EMCAL cell indecated by relid
73 void RelPosInModule(const Int_t *relid,Float_t &theta,Float_t &phi);
74 // Returns an array indicating the Tower/preshower, iz, and iphi for a
75 // specific EMCAL indes.
76 Bool_t AbsToRelNumbering(Int_t AbsId, Int_t *relid);
77 /*
78 // Returns kTRUE if the two indexs are neighboring towers or preshowers.
79 Boot_t AliEMCALGeometry::AreNeighbours(Int_t index1,Int_t index2);
80 */
81
82 protected:
83 AliEMCALGeometry(const Text_t* name, const Text_t* title="") :
84 AliGeometry(name, title) {
85 // ctor only for internal usage (singleton)
86 Init() ;
87 };
88 void Init(void) ; // initializes the parameters of EMCAL
89 private:
90 static AliEMCALGeometry * fgGeom ; // pointer to the unique instance
91 // of the singleton
92 static Bool_t fgInit ;// Tells if geometry has been succesfully set up
93 // geometry
94 Float_t fAirGap ; // Distance between envelop and active material
95 Float_t fArm1PhiMin ; // Minimum angular position of EMCAL in Phi (degrees)
96 Float_t fArm1PhiMax ; // Maximum angular position of EMCAL in Phi (degrees)
97
98 // It is assumed that Arm1 and Arm2 have the same following parameters
99 Float_t fEnvelop[3] ; // the GEANT TUB for the detector
100 Float_t fIPDistance ; // Distance of the inner surface to the
101 // interaction point
102 Float_t fShellThickness ; // Total thickness in (x,y) direction
103 Float_t fZLength ; // Total length in z direction
104 Float_t fGap2Active ; // Gap between the envelop and the active material
105 Int_t fNLayers ; // Number of layers of material in the R direction
106 Int_t fNZ ; // Number of Towers in the Z direction
107 Int_t fNPhi ; //Number of Towers in the Phi Direction
2012850d 108
ca8f5bd0 109 ClassDef(AliEMCALGeometry,2) // EMCAL geometry class
2012850d 110
111} ;
112
113#endif // AliEMCALGEOMETRY_H
ca8f5bd0 114
115