// -0.7 to 0.7 in eta
// Number of Modules and Layers may be controlled by
// the name of the instance defined
-// EMCALArch2x has more modules along both phi and eta
-// EMCALArchxa has less Layers in the Radial Direction
//*-- Author: Sahal Yacoob (LBL / UCT)
// and : Yves Schutz (SUBATECH)
// and : Jennifer Klay (LBL)
-// --- ROOT system ---
-
-// --- Standard library ---
-#include <stdlib.h>
-
// --- AliRoot header files ---
#include <TMath.h>
+#include <TVector3.h>
// -- ALICE Headers.
-#include "AliConst.h"
+//#include "AliConst.h"
// --- EMCAL headers
#include "AliEMCALGeometry.h"
-ClassImp(AliEMCALGeometry);
+ClassImp(AliEMCALGeometry)
AliEMCALGeometry *AliEMCALGeometry::fgGeom = 0;
Bool_t AliEMCALGeometry::fgInit = kFALSE;
AliEMCALGeometry::~AliEMCALGeometry(void){
// dtor
}
+
+//______________________________________________________________________
+Bool_t AliEMCALGeometry::AreInSameTower(Int_t id1, Int_t id2) const {
+ // Find out whether two hits are in the same tower
+ Int_t idmax = TMath::Max(id1, id2) ;
+ Int_t idmin = TMath::Min(id1, id2) ;
+ if ( ((idmax - GetNZ() * GetNPhi()) == idmin ) ||
+ ((idmax - 2 * GetNZ() * GetNPhi()) == idmin ) )
+ return kTRUE ;
+ else
+ return kFALSE ;
+}
+
//______________________________________________________________________
void AliEMCALGeometry::Init(void){
- // Initializes the EMCAL parameters
+ // Initializes the EMCAL parameters
+ // naming convention : GUV_WX_N_ gives the composition of a tower
+ // WX inform about the composition of the EM calorimeter section:
+ // thickness in mm of Pb radiator (W) and of scintillator (X), and number of scintillator layers (N)
+ // New geometry: EMCAL_55_25
+
+ fgInit = kFALSE; // Assume failed until proven otherwise.
+ TString name(GetName()) ;
+ if (name == "EMCAL_55_25") {
+ fECPbRadThickness = 0.5; // cm, Thickness of the Pb radiators
+ fECScintThick = 0.5; // cm, Thickness of the scintillator
+ fNECLayers = 25; // number of scintillator layers
+
+ fSampling = 13.1; // calculated with Birk's law implementation
+
+ fAlFrontThick = 3.5; // cm, Thickness of front Al layer
+ fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator
+ }
+ else if( name == "G56_2_55_19" || name == "EMCAL_5655_21" || name == "G56_2_55_19_104_14"|| name == "G65_2_64_19" || name == "EMCAL_6564_21"){
+ Fatal("Init", "%s is an old geometry! Please update your Config file", name.Data()) ;
+ }
+ else
+ Fatal("Init", "%s is an undefined geometry!", name.Data()) ;
+
+ // geometry
+ fNZ = 114; // granularity along Z (eta)
+ fNPhi = 168; // granularity in phi (azimuth)
+ fArm1PhiMin = 60.0; // degrees, Starting EMCAL Phi position
+ fArm1PhiMax = 180.0; // degrees, Ending EMCAL Phi position
+ fArm1EtaMin = -0.7; // pseudorapidity, Starting EMCAL Eta position
+ fArm1EtaMax = +0.7; // pseudorapidity, Ending EMCAL Eta position
+
+ fIPDistance = 454.0; // cm, Radial distance to inner surface of EMCAL
- fgInit = kFALSE; // Assume failer untill proven otherwise.
+ //There is always one more scintillator than radiator layer because of the first block of aluminium
+ fShellThickness = fAlFrontThick + fGap2Active + fNECLayers*GetECScintThick()+(fNECLayers-1)*GetECPbRadThick();
- TString name(GetName()) ;
-
- if( name != "EMCALArch1a" &&
- name != "EMCALArch1b" &&
- name != "EMCALArch2a" &&
- name != "EMCALArch2b" ){
- Fatal("Init", "%s is not a known geometry (choose among EMCALArch1a, EMCALArch1b, EMCALArch2a and EMCALArch2b)", name.Data()) ;
- } // end if
- //
- if ( name == "EMCALArch1a" ||
- name == "EMCALArch1b" ) {
- fNZ = 96;
- fNPhi = 144;
- } // end if
- if ( name == "EMCALArch2a" ||
- name, "EMCALArch2b" ) {
- fNZ = 112;
- fNPhi = 168;
- } // end if
- if ( name == "EMCALArch1a" ||
- name == "EMCALArch2a" ) {
- fNLayers = 21;
- } // end if
- if ( name == "EMCALArch1b" ||
- name == "EMCALArch2b" ) {
- fNLayers = 25;
- } // end if
-
- // geometry
- fAirGap = 5.0; // cm, air gap between EMCAL mother volume and
- // active material.
- fAlFrontThick = 3.18; // cm, Thickness of front Al layer
- fPbRadThickness = 0.5; // cm, Thickness of the Pb radiators.
- fPreShowerSintThick = 0.6; // cm, Thickness of the sintilator for the
- // preshower part of the calorimeter
- fFullShowerSintThick = 0.5; // cm, Thickness of the sintilator for the
- // full shower part of the calorimeter
- fArm1PhiMin = 60.0; // degrees, Starting EMCAL Phi position
- fArm1PhiMax = 180.0; // degrees, Ending EMCAL Phi position
- fArm1EtaMin = -0.7; // pseudorapidity, Starting EMCAL Eta position
- fArm1EtaMax = +0.7; // pseudorapidity, Ending EMCAL Eta position
- fIPDistance = 454.0; // cm, Radial distance to inner surface of EMCAL
- fShellThickness = GetAlFrontThickness() + 2.*GetPreSintThick() +
- (fNLayers-2)*GetFullSintThick()+(fNLayers-1)*GetPbRadThick();
- //below; cm, Z lenght of the EMCAL.
- fZLength = 2.*ZFromEtaR(fIPDistance+fShellThickness,fArm1EtaMax);
- fEnvelop[0] = fIPDistance; // mother volume inner radius
- fEnvelop[1] = fIPDistance + fShellThickness; // mother volume outer r.
- fEnvelop[2] = 1.00001*fZLength; // add some padding for mother volume.
- fGap2Active = 1.0; // cm, Gap between
- fgInit = kTRUE;
+ fZLength = 2.*ZFromEtaR(fIPDistance+fShellThickness,fArm1EtaMax); // Z coverage
+ fEnvelop[0] = fIPDistance; // mother volume inner radius
+ fEnvelop[1] = fIPDistance + fShellThickness; // mother volume outer r.
+ fEnvelop[2] = 1.00001*fZLength; // add some padding for mother volume.
+
+ fgInit = kTRUE;
+
+ if (gDebug) {
+ printf("Init: geometry of EMCAL named %s is as follows:", name.Data());
+ printf( " ECAL : %d x (%f mm Pb, %f mm Sc) \n", GetNECLayers(), GetECPbRadThick(), GetECScintThick() ) ;
+ printf("Granularity: %d in eta and %d in phi\n", GetNZ(), GetNPhi()) ;
+ printf("Layout: phi = (%f, %f), eta = (%f, %f), y = %f\n",
+ GetArm1PhiMin(), GetArm1PhiMax(),GetArm1EtaMin(), GetArm1EtaMax(), GetIPDistance() ) ;
+ }
}
//______________________________________________________________________
} // end if strcmp(name,"")
}else{
if ( strcmp(fgGeom->GetName(), name) != 0 ) {
- TString message("\n") ;
- message += "current geometry is " ;
- message += fgGeom->GetName() ;
- message += "\n you cannot call " ;
- message += name ;
- ::Info("GetGeometry", message.Data() ) ;
+ printf("\ncurrent geometry is ") ;
+ printf(fgGeom->GetName());
+ printf("\n you cannot call ");
+ printf(name);
}else{
rv = (AliEMCALGeometry *) fgGeom;
} // end if
}
//______________________________________________________________________
-Int_t AliEMCALGeometry::TowerIndex(Int_t ieta,Int_t iphi,Int_t ipre) const {
- // Returns the tower index number from the based on the Z and Phi
- // index numbers. There are 2 times the number of towers to separate
- // out the full towsers from the pre-towsers.
- // Inputs:
- // Int_t ieta // index allong z axis [1-fNZ]
- // Int_t iphi // index allong phi axis [1-fNPhi]
- // Int_t ipre // 0 = Full tower, 1 = Pre-shower tower only. [0,1]
- // Outputs:
- // none.
- // Returned
- // Int_t the absoulute tower index. [1-2*fNZ*fNPhi]
- Int_t index;
-
- if((ieta<=0 || ieta>GetNEta()) || (iphi<=0 || iphi>GetNPhi()) ||
- (ipre<0 || ipre>1) ){
- TString message ("\n") ;
- message += "inputs out of range ieta= " ;
- message += ieta ;
- message += " [1-" ;
- message += GetNEta() ;
- message += "] iphi= " ;
- message += iphi ;
- message += " [1-" ;
- message += GetNPhi() ;
- message += "] ipre= " ;
- message += ipre ;
- message += "[0,1]. returning -1" ;
- Warning("TowerIndex", message.Data() ) ;
- return -1;
- } // end if
- index = iphi + GetNPhi()*(ieta-1) + ipre*(GetNPhi()*GetNEta());
- return index;
+Int_t AliEMCALGeometry::TowerIndex(Int_t ieta,Int_t iphi) const {
+ // Returns the tower index number from the based on the Z and Phi
+ // index numbers.
+ // Inputs:
+ // Int_t ieta // index along z axis [1-fNZ]
+ // Int_t iphi // index along phi axis [1-fNPhi]
+ // Outputs:
+ // none.
+ // Returned
+ // Int_t index // Tower index number
+
+ if ( (ieta <= 0 || ieta>GetNEta()) ||
+ (iphi <= 0 || iphi>GetNPhi())) {
+ Error("TowerIndex", "Unexpected parameters eta = %d phi = %d!", ieta, iphi) ;
+ return -1;
+ }
+ return ( (iphi - 1)*GetNEta() + ieta );
}
//______________________________________________________________________
-void AliEMCALGeometry::TowerIndexes(Int_t index,Int_t &ieta,Int_t &iphi,
- Int_t &ipre) const {
- // given the tower index number it returns the based on the Z and Phi
- // index numbers and if it is for the full tower or the pre-tower number.
- // There are 2 times the number of towers to separate
- // out the full towsers from the pre-towsers.
- // Inputs:
- // Int_t index // Tower index number [1-2*fNZ*fNPhi]
- // Outputs:
- // Int_t ieta // index allong z axis [1-fNZ]
- // Int_t iphi // index allong phi axis [1-fNPhi]
- // Int_t ipre // 0 = Full tower, 1 = Pre-shower tower only. [0,1]
- // Returned
- // none.
- Int_t itowers;
-
- itowers = GetNEta()*GetNPhi();
- if(index<1 || index>2*itowers){
- TString message("\n") ;
- message += "index= " ;
- message += index ;
- message += " is out of range [1-" ;
- message += 2*itowers ;
- message += "], returning -1 for all." ;
- Warning("TowerIndex", message.Data() ) ;
- ieta = -1; iphi = -1; ipre = -1;
- return ;
- } // end if
- ipre = 0;
- if(index>itowers){ // pre shower indexs
- ipre = 1;
- index = index - itowers;
- } // end if
- ieta = 1+ (Int_t)((index-1)/GetNPhi());
- iphi = index - GetNPhi()*(ieta-1);
+void AliEMCALGeometry::TowerIndexes(Int_t index,Int_t &ieta,Int_t &iphi) const {
+ // Inputs:
+ // Int_t index // Tower index number [1-fNZ*fNPhi]
+ // Outputs:
+ // Int_t ieta // index allong z axis [1-fNZ]
+ // Int_t iphi // index allong phi axis [1-fNPhi]
+ // Returned
+ // none.
+
+ Int_t nindex = 0;
+
+ if ( IsInECA(index) ) { // ECAL index
+ nindex = index ;
+ }
+ else {
+ Error("TowerIndexes", "Unexpected Id number!") ;
+ ieta = -1;
+ iphi = -1;
return;
+ }
+
+ if (nindex%GetNZ())
+ iphi = nindex / GetNZ() + 1 ;
+ else
+ iphi = nindex / GetNZ() ;
+ ieta = nindex - (iphi - 1) * GetNZ() ;
+
+ if (gDebug==2)
+ printf("TowerIndexes: index=%d,%d, ieta=%d, iphi = %d", index, nindex,ieta, iphi) ;
+ return;
+
}
//______________________________________________________________________
// given the tower index number it returns the based on the eta and phi
// of the tower.
// Inputs:
- // Int_t index // Tower index number [1-2*fNZ*fNPhi]
+ // Int_t index // Tower index number [1-fNZ*fNPhi]
// Outputs:
// Float_t eta // eta of center of tower in pseudorapidity
// Float_t phi // phi of center of tower in degrees
// Returned
// none.
- Int_t ieta,iphi,ipre;
- Double_t deta,dphi,phid;
-
- TowerIndexes(index,ieta,iphi,ipre);
- deta = (GetArm1EtaMax()-GetArm1EtaMin())/((Float_t)GetNEta());
- eta = GetArm1EtaMin() + (((Float_t)ieta)-0.5)*deta;
- dphi = (GetArm1PhiMax() - GetArm1PhiMin())/((Float_t)GetNPhi()); // in degrees.
- phid = GetArm1PhiMin() + dphi*((Float_t)iphi -0.5);//iphi range [1-fNphi].
- phi = phid;
+ Int_t ieta, iphi;
+ Float_t deta, dphi ;
+
+ TowerIndexes(index,ieta,iphi);
+
+ if (gDebug == 2)
+ printf("EtaPhiFromIndex: index = %d, ieta = %d, iphi = %d", index, ieta, iphi) ;
+
+ deta = (GetArm1EtaMax()-GetArm1EtaMin())/(static_cast<Float_t>(GetNEta()));
+ eta = GetArm1EtaMin() + ((static_cast<Float_t>(ieta) - 0.5 ))*deta;
+
+ dphi = (GetArm1PhiMax() - GetArm1PhiMin())/(static_cast<Float_t>(GetNPhi())); // in degrees.
+ phi = GetArm1PhiMin() + dphi*(static_cast<Float_t>(iphi) - 0.5);//iphi range [1-fNphi].
}
//______________________________________________________________________
// none.
// Returned
// Int_t index // Tower index number [1-fNZ*fNPhi]
+
Int_t ieta,iphi;
- ieta = 1 + (Int_t)(((Float_t)GetNEta())*(eta-GetArm1EtaMin())/
- (GetArm1EtaMax() - GetArm1EtaMin()));
- if(ieta<=0 || ieta>GetNEta()){
- TString message("\n") ;
- message += "ieta = " ;
- message += ieta ;
- message += " eta=" ;
- message += eta ;
- message += " is outside of EMCAL. etamin=" ;
- message += GetArm1EtaMin() ;
- message += " to etamax=" ;
- message += GetArm1EtaMax();
- message += " returning -1";
- Warning("TowerIndexFromEtaPhi", message.Data() ) ;
- return -1;
- } // end if
- iphi = 1 + (Int_t)(((Float_t)GetNPhi())*(phi-GetArm1PhiMin())/
- ((Float_t)(GetArm1PhiMax() - GetArm1PhiMin())));
- if(iphi<=0 || iphi>GetNPhi()){
- TString message("\n") ;
- message += "iphi=" ;
- message += iphi ;
- message += "phi= " ;
- message += phi ;
- message += " is outside of EMCAL." ;
- message += " Phimin=" ;
- message += GetArm1PhiMin() ;
- message += " PhiMax=" ;
- message += GetArm1PhiMax() ;
- message += " returning -1" ;
- Warning("TowerIndexFromEtaPhi", message.Data() ) ;
- return -1;
- } // end if
- return TowerIndex(ieta,iphi,0);
-}
+ ieta = static_cast<Int_t> ( 1 + (static_cast<Float_t>(GetNEta()) * (eta - GetArm1EtaMin()) / (GetArm1EtaMax() - GetArm1EtaMin())) ) ;
-//______________________________________________________________________
-Int_t AliEMCALGeometry::PreTowerIndexFromEtaPhi(Float_t eta,Float_t phi) const {
- // returns the pretower index number based on the eta and phi of the tower.
- // Inputs:
- // Float_t eta // eta of center of tower in pseudorapidity
- // Float_t phi // phi of center of tower in degrees
- // Outputs:
- // none.
- // Returned
- // Int_t index // PreTower index number [fNZ*fNPhi-2*fNZ*fNPhi]
+ if( ieta <= 0 || ieta > GetNEta() ) {
+ Error("TowerIndexFromEtaPhi", "Unexpected (eta, phi) = (%f, %f) value, outside of EMCAL!", eta, phi) ;
+ return -1 ;
+ }
+
+ iphi = static_cast<Int_t> ( 1 + (static_cast<Float_t>(GetNPhi()) * (phi - GetArm1PhiMin()) / (GetArm1PhiMax() - GetArm1PhiMin())) ) ;
- return GetNEta()*GetNPhi()+TowerIndexFromEtaPhi(eta,phi);
+ if( iphi <= 0 || iphi > GetNPhi() ) {
+ Error("TowerIndexFromEtaPhi", "Unexpected (eta, phi) = (%f, %f) value, outside of EMCAL!", eta, phi) ;
+ return -1 ;
+ }
+
+ return TowerIndex(ieta,iphi);
}
//______________________________________________________________________
Bool_t AliEMCALGeometry::AbsToRelNumbering(Int_t AbsId, Int_t *relid) const {
// Converts the absolute numbering into the following array/
- // relid[0] = EMCAL Arm number 1:1
- // relid[1] = 0 Not in Pre Shower layers
- // = -1 In Pre Shower
- // relid[2] = Row number inside EMCAL
- // relid[3] = Column number inside EMCAL
+ // relid[0] = Row number inside EMCAL
+ // relid[1] = Column number inside EMCAL
// Input:
// Int_t AbsId // Tower index number [1-2*fNZ*fNPhi]
// Outputs:
- // Int_t *relid // array of 5. Discribed above.
+ // Int_t *relid // array of 2. Described above.
Bool_t rv = kTRUE ;
- Int_t ieta=0,iphi=0,ipre=0,index=AbsId;
+ Int_t ieta=0,iphi=0,index=AbsId;
- TowerIndexes(index,ieta,iphi,ipre);
- relid[0] = 1;
- relid[1] = 0;
- if(ipre==1)
- relid[1] = -1;
- relid[2] = ieta;
- relid[3] = iphi;
+ TowerIndexes(index,ieta,iphi);
+ relid[0] = ieta;
+ relid[1] = iphi;
return rv;
}
//______________________________________________________________________
-void AliEMCALGeometry::PosInAlice(const Int_t *relid,Float_t &theta,
- Float_t &phi) const {
- // Converts the relative numbering into the local EMCAL-module (x, z)
- // coordinates
- Int_t ieta = relid[2]; // offset along x axis
- Int_t iphi = relid[3]; // offset along z axis
- Int_t ipre = relid[1]; // indicates -1 preshower, or 0 full tower.
- Int_t index;
- Float_t eta;
-
- if(ipre==-1) ipre = 1;
- index = TowerIndex(ieta,iphi,ipre);
- EtaPhiFromIndex(index,eta,phi);
- theta = 180.*(2.0*TMath::ATan(TMath::Exp(-eta)))/TMath::Pi();
+void AliEMCALGeometry::PosInAlice(const Int_t *relid, Float_t &theta, Float_t &phi) const
+{
+ // Converts the relative numbering into the local EMCAL-module (x, z)
+ // coordinates
+ Int_t ieta = relid[0]; // offset along x axis
+ Int_t iphi = relid[1]; // offset along z axis
+ Int_t index;
+ Float_t eta;
+
+ index = TowerIndex(ieta,iphi);
+ EtaPhiFromIndex(index,eta,phi);
+ //theta = 180.*(2.0*TMath::ATan(TMath::Exp(-eta)))/TMath::Pi();
+ theta = 2.0*TMath::ATan(TMath::Exp(-eta));
+
+ // correct for distance to IP
+ Float_t d = GetIP2ECASection() - GetIPDistance() ;
+
+ Float_t correction = 1 + d/GetIPDistance() ;
+ Float_t tantheta = TMath::Tan(theta) * correction ;
+ theta = TMath::ATan(tantheta) * TMath::RadToDeg() ;
+ if (theta < 0 )
+ theta += 180. ;
+
+ return;
+}
+//______________________________________________________________________
+void AliEMCALGeometry::PosInAlice(Int_t absid, Float_t &theta, Float_t &phi) const
+{
+ // Converts the relative numbering into the local EMCAL-module (x, z)
+ // coordinates
+ Int_t relid[2] ;
+ AbsToRelNumbering(absid, relid) ;
+ Int_t ieta = relid[0]; // offset along x axis
+ Int_t iphi = relid[1]; // offset along z axis
+ Int_t index;
+ Float_t eta;
+
+ index = TowerIndex(ieta,iphi);
+ EtaPhiFromIndex(index,eta,phi);
+ theta = 2.0*TMath::ATan(TMath::Exp(-eta)) ;
+
+ // correct for distance to IP
+ Float_t d = 0. ;
+ if (IsInECA(absid))
+ d = GetIP2ECASection() - GetIPDistance() ;
+ else {
+ Error("PosInAlice", "Unexpected id # %d!", absid) ;
return;
+ }
+
+ Float_t correction = 1 + d/GetIPDistance() ;
+ Float_t tantheta = TMath::Tan(theta) * correction ;
+ theta = TMath::ATan(tantheta) * TMath::RadToDeg() ;
+ if (theta < 0 )
+ theta += 180. ;
+
+ return;
}
//______________________________________________________________________
// Returned
// none.
- Float_t eta,theta, phi,cyl_radius,kDeg2Rad;
+ Float_t eta,theta, phi,cylradius=0. ;
- Int_t ieta = relid[2]; // offset along x axis
- Int_t iphi = relid[3]; // offset along z axis
- Int_t ipre = relid[1]; // indicates -1 preshower, or 0 full tower.
+ Int_t ieta = relid[0]; // offset along x axis
+ Int_t iphi = relid[1]; // offset along z axis.
Int_t index;
-
- if(ipre==-1) ipre = 1;
- index = TowerIndex(ieta,iphi,ipre);
+ index = TowerIndex(ieta,iphi);
EtaPhiFromIndex(index,eta,phi);
theta = 180.*(2.0*TMath::ATan(TMath::Exp(-eta)))/TMath::Pi();
- kDeg2Rad = TMath::Pi() / static_cast<Double_t>(180) ;
- cyl_radius = GetIPDistance()+ GetAirGap() ;
- x = cyl_radius * TMath::Cos(phi * kDeg2Rad ) ;
- y = cyl_radius * TMath::Sin(phi * kDeg2Rad ) ;
- z = cyl_radius / TMath::Tan(theta * kDeg2Rad ) ;
+ cylradius = GetIP2ECASection() ;
+
+ Double_t kDeg2Rad = TMath::DegToRad() ;
+ x = cylradius * TMath::Cos(phi * kDeg2Rad ) ;
+ y = cylradius * TMath::Sin(phi * kDeg2Rad ) ;
+ z = cylradius / TMath::Tan(theta * kDeg2Rad ) ;
return;
}
//______________________________________________________________________
-/*
-Boot_t AliEMCALGeometry::AreNeighbours(Int_t index1,Int_t index2) const {
- // Returns kTRUE if the two towers are neighbours or not, including
- // diagonals. Both indexes are required to be either towers or preshower.
- // Inputs:
- // Int_t index1 // index of tower 1
- // Int_t index2 // index of tower 2
+void AliEMCALGeometry::XYZFromIndex(Int_t absid, TVector3 &v) const {
+ // given the tower relative number it returns the X, Y and Z
+ // of the tower.
+
// Outputs:
- // none.
+ // Float_t x // x of center of tower in cm
+ // Float_t y // y of center of tower in cm
+ // Float_t z // z of centre of tower in cm
// Returned
- // Boot_t kTRUE if the towers are neighbours otherwise false.
- Boot_t anb = kFALSE;
- Int_t ieta1 = 0, ieta2 = 0, iphi1 = 0, iphi2 = 0, ipre1 = 0, ipre2 = 0;
-
- TowerIndexes(index1,ieta1,iphi1,ipre1);
- TowerIndexes(index2,ieta2,iphi2,ipre2);
- if(ipre1!=ipre2) return anb;
- if((ieta1>=ieta2-1 && ieta1<=ieta2+1) && (iphi1>=iphi2-1 &&iphi1<=iphi2+1))
- anb = kTRUE;
- return anb;
+ // none.
+
+ Float_t theta, phi,cylradius=0. ;
+
+ PosInAlice(absid, theta, phi) ;
+
+ if ( IsInECA(absid) )
+ cylradius = GetIP2ECASection() ;
+ else {
+ Error("XYZFromIndex", "Unexpected Tower section") ;
+ return;
+ }
+
+ Double_t kDeg2Rad = TMath::DegToRad() ;
+ v.SetX(cylradius * TMath::Cos(phi * kDeg2Rad ) );
+ v.SetY(cylradius * TMath::Sin(phi * kDeg2Rad ) );
+ v.SetZ(cylradius / TMath::Tan(theta * kDeg2Rad ) ) ;
+
+ return;
+}
+
+Bool_t AliEMCALGeometry::IsInEMCAL(Double_t x, Double_t y, Double_t z) const {
+ // Checks whether point is inside the EMCal volume
+ //
+ // Code uses cylindrical approximation made of inner radius (for speed)
+ //
+ // Points behind EMCAl, i.e. R > outer radius, but eta, phi in acceptance
+ // are considered to inside
+
+ Double_t r=sqrt(x*x+y*y);
+
+ if ( r > fEnvelop[0] ) {
+ Double_t theta;
+ theta = TMath::ATan2(r,z);
+ Double_t eta;
+ if(theta == 0)
+ eta = 9999;
+ else
+ eta = -TMath::Log(TMath::Tan(theta/2.));
+ if (eta < fArm1EtaMin || eta > fArm1EtaMax)
+ return 0;
+
+ Double_t phi = TMath::ATan2(y,x) * 180./TMath::Pi();
+ if (phi > fArm1PhiMin && phi < fArm1PhiMax)
+ return 1;
+ }
+ return 0;
}
- */
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff