Dummy Impact() method added.
[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
2012850d 26class AliEMCALGeometry : public AliGeometry {
ca8f5bd0 27 public:
28 AliEMCALGeometry() {
29 // default ctor, must be kept public for root persistency purposes,
30 // but should never be called by the outside world
31 };
32 AliEMCALGeometry(const AliEMCALGeometry & geom) {
33 // cpy ctor requested by Coding Convention but not yet needed
34 assert(0==1);
35 };
36 virtual ~AliEMCALGeometry(void) ;
37 static AliEMCALGeometry * GetInstance(const Text_t* name,
38 const Text_t* title="") ;
39 static AliEMCALGeometry * GetInstance() ;
40 AliEMCALGeometry & operator = (const AliEMCALGeometry & rvalue) const {
41 // assignement operator requested by coding convention but not needed
42 assert(0==1) ;
43 return *(GetInstance()) ;
44 };
45 virtual void GetGlobal(const AliRecPoint *, TVector3 &, TMatrix &) const {}
46 virtual void GetGlobal(const AliRecPoint *, TVector3 &) const {}
48d44618 47 virtual Bool_t Impact(const TParticle * particle) const {return kTRUE;}
ca8f5bd0 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 ; }
e908f07f 53 const Float_t GetAlFrontThickness() const { return fAlFrontThick;}
ca8f5bd0 54 const Float_t GetArm1PhiMin() const { return fArm1PhiMin ; }
55 const Float_t GetArm1PhiMax() const { return fArm1PhiMax ; }
e908f07f 56 const Float_t GetArm1EtaMin() const { return fArm1EtaMin;}
57 const Float_t GetArm1EtaMax() const { return fArm1EtaMax;}
ca8f5bd0 58 const Float_t GetIPDistance() const { return fIPDistance ; }
59 const Float_t GetEnvelop(Int_t index) const { return fEnvelop[index] ; }
60 const Float_t GetShellThickness() const { return fShellThickness ; }
61 const Float_t GetZLength() const { return fZLength ; }
62 const Float_t GetGap2Active() const {return fGap2Active ; }
e908f07f 63 const Float_t GetDeltaEta() const {return (fArm1EtaMax-fArm1EtaMin)/
64 ((Float_t)fNZ);}
65 const Float_t GetDeltaPhi() const {return (fArm1PhiMax-fArm1PhiMin)/
66 ((Float_t)fNPhi);}
ca8f5bd0 67 const Int_t GetNLayers() const {return fNLayers ;}
68 const Int_t GetNZ() const {return fNZ ;}
e908f07f 69 const Int_t GetNEta() const {return fNZ ;}
ca8f5bd0 70 const Int_t GetNPhi() const {return fNPhi ;}
6119e5db 71 const Int_t GetNTowers() const {return fNPhi * fNZ ;}
e908f07f 72 const Float_t GetPbRadThick(){ // returns Pb radiator thickness in cm.
73 return fPbRadThickness;
74 }
75 const Float_t GetFullSintThick(){ // returns Full tower sintilator
76 // thickness in cm.
77 return fFullShowerSintThick;
78 }
79 const Float_t GetPreSintThick(){ // returns PreShower tower sintilator
80 // thickness in cm.
81 return fPreShowerSintThick;
82 }
83 Float_t AngleFromEta(Float_t eta){ // returns angle in radians for a given
84 // pseudorapidity.
85 return 2.0*TMath::ATan(TMath::Exp(-eta));
86 }
87 Float_t ZFromEtaR(Float_t r,Float_t eta){ // returns z in for a given
88 // pseudorapidity and r=sqrt(x*x+y*y).
89 return r/TMath::Tan(AngleFromEta(eta));
90 }
da98933e 91 Int_t TowerIndex(Int_t iz,Int_t iphi,Int_t ipre) const; // returns tower index
ca8f5bd0 92 // returns tower indexs iz, iphi.
da98933e 93 void TowerIndexes(Int_t index,Int_t &iz,Int_t &iphi,Int_t &ipre) const;
ca8f5bd0 94 // for a given tower index it returns eta and phi of center of that tower.
da98933e 95 void EtaPhiFromIndex(Int_t index,Float_t &eta,Float_t &phi) const;
6119e5db 96 // returns x, y, and z (cm) on the inner surface of a given EMCAL Cell specified by relid.
97 void XYZFromIndex(const Int_t *relid,Float_t &x,Float_t &y, Float_t &z) const;
ca8f5bd0 98 // for a given eta and phi in the EMCAL it returns the tower index.
da98933e 99 Int_t TowerIndexFromEtaPhi(Float_t eta,Float_t phi) const;
ca8f5bd0 100 // for a given eta and phi in the EMCAL it returns the pretower index.
da98933e 101 Int_t PreTowerIndexFromEtaPhi(Float_t eta,Float_t phi) const;
ca8f5bd0 102 // Returns theta and phi (degree) for a given EMCAL cell indecated by relid
a34b7b9f 103 void PosInAlice(const Int_t *relid,Float_t &theta,Float_t &phi) const ;
ca8f5bd0 104 // Returns an array indicating the Tower/preshower, iz, and iphi for a
105 // specific EMCAL indes.
da98933e 106 Bool_t AbsToRelNumbering(Int_t AbsId, Int_t *relid) const;
ca8f5bd0 107 /*
108 // Returns kTRUE if the two indexs are neighboring towers or preshowers.
da98933e 109 Boot_t AliEMCALGeometry::AreNeighbours(Int_t index1,Int_t index2) const;
ca8f5bd0 110 */
111
112 protected:
113 AliEMCALGeometry(const Text_t* name, const Text_t* title="") :
e908f07f 114 AliGeometry(name, title) {// ctor only for internal usage (singleton)
115 Init();
ca8f5bd0 116 };
117 void Init(void) ; // initializes the parameters of EMCAL
e908f07f 118
ca8f5bd0 119 private:
120 static AliEMCALGeometry * fgGeom ; // pointer to the unique instance
121 // of the singleton
e908f07f 122 static Bool_t fgInit;// Tells if geometry has been succesfully set up.
123 Float_t fAirGap; // Distance between envelop and active material
124 Float_t fAlFrontThick; // Thickness of the front Al face of the support box
125 Float_t fPreShowerSintThick; // Thickness of the sintilator for the
126 // preshower part of the calorimeter
127 Float_t fFullShowerSintThick;// Thickness of the sintilaor for the full
128 // shower part of the calorimeter
129 Float_t fPbRadThickness; // Thickness of Pb radiators cm.
130 Float_t fArm1PhiMin; // Minimum angular position of EMCAL in Phi (degrees)
131 Float_t fArm1PhiMax; // Maximum angular position of EMCAL in Phi (degrees)
132 Float_t fArm1EtaMin; // Minimum pseudorapidity position of EMCAL in Eta
133 Float_t fArm1EtaMax; // Maximum pseudorapidity position of EMCAL in Eta
ca8f5bd0 134
135 // It is assumed that Arm1 and Arm2 have the same following parameters
e908f07f 136 Float_t fEnvelop[3]; // the GEANT TUB for the detector
137 Float_t fIPDistance; // Radial Distance of the inner surface of the EMCAL
138 Float_t fShellThickness; // Total thickness in (x,y) direction
139 Float_t fZLength; // Total length in z direction
140 Float_t fGap2Active; // Gap between the envelop and the active material
141 Int_t fNLayers; // Number of layers of material in the R direction
142 Int_t fNZ; // Number of Towers in the Z direction
143 Int_t fNPhi; //Number of Towers in the Phi Direction
2012850d 144
e908f07f 145 ClassDef(AliEMCALGeometry,3) // EMCAL geometry class
2012850d 146
e908f07f 147};
2012850d 148
149#endif // AliEMCALGEOMETRY_H