[u/mrichter/AliRoot.git] / EMCAL / AliEMCALGeometry.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$*/

//_________________________________________________________________________
// Geometry class  for EMCAL : singleton  
// EMCAL consists of layers of scintillator and lead
// Places the the Barrel Geometry of The EMCAL at Midrapidity
// between 0 and 120 degrees of Phi and
// -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>

// -- ALICE Headers.
#include "AliConst.h"

// --- EMCAL headers
#include "AliEMCALGeometry.h"

ClassImp(AliEMCALGeometry);

AliEMCALGeometry *AliEMCALGeometry::fgGeom = 0;
Bool_t            AliEMCALGeometry::fgInit = kFALSE;

//______________________________________________________________________
AliEMCALGeometry::~AliEMCALGeometry(void){
    // dtor
}
//______________________________________________________________________
void AliEMCALGeometry::Init(void){
    // Initializes the EMCAL parameters

    fgInit = kFALSE; // Assume failer untill proven otherwise.

    TString name(GetName()) ; 
		 
    if( name != "EMCALArch1a" &&
	name != "EMCALArch1b" && 
	name != "EMCALArch2a" && 
	name != "EMCALArch2b" && 
	name != "EMCALArch1aN" ){
      Fatal("Init", "%s is not a known geometry (choose among EMCALArch1a, EMCALArch1b, EMCALArch2a and EMCALArch2b, EMCALArch1aN)",  name.Data()) ;  
    } // end if
    //
    if ( name == "EMCALArch1a"  ||
	 name == "EMCALArch1b"  || 
	 name == "EMCALArch1aN") {
      fNZ         = 96;
      fNPhi       = 144;
    } // end if
    if ( name == "EMCALArch2a"  ||
	 name == "EMCALArch2b" ) {
	fNZ         = 112;
	fNPhi       = 168;
    } // end if
    if ( name == "EMCALArch1a"  ||
	 name == "EMCALArch2a" ) {
      fNPRLayers  = 2;
      fNECLayers  = 19;
      fNHCLayers  = 0;
    } // end if
    if ( name == "EMCALArch1b"  ||
	 name == "EMCALArch2b" ) {
	fNPRLayers  = 2;
	fNECLayers  = 23;
	fNHCLayers  = 0;
    } // end if
    if ( name == "EMCALArch1aN") { 
      fNPRLayers   = 2;
      fNECLayers  = 19;
      fNHCLayers  = 14;
    }

    // geometry
    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

    fAlFrontThick        = 3.18; // cm, Thickness of front Al layer
    fGap2Active          = 1.0;  // cm, Gap between Al and 1st Scintillator
    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 dull shower part of the calorimeter
    fCuRadThickness      = 0.0;  // cm, Thickness of the Cu radiators.

    if (name ==  "EMCALArch1aN") {
      fAlFrontThick        = 3.0;  // cm, Thickness of front Al layer
      fGap2Active          = 1.0;  // cm, Gap between Al and 1st Scintillator
      fPbRadThickness      = 0.6;  // cm, Thickness of the Pb radiators.
      fPreShowerSintThick  = 0.5;  // cm, Thickness of the sintilator for the preshower part of the calorimeter
      fFullShowerSintThick = 0.4;  // cm, Thickness of the sintilator for the full shower part of the calorimeter
      fCuRadThickness      = 1.0;  // cm, Thickness of the Cu radiators.
   }

    fIPDistance     = 454.0; // cm, Radial distance to inner surface of EMCAL
    fShellThickness = fAlFrontThick + fGap2Active + 2.*(GetPreSintThick() + GetPbRadThick()) + // pre shower 
      (fNECLayers-1)*(GetFullSintThick()+ GetPbRadThick()) + // E cal -1 because the last element is a scintillator
      fNHCLayers*(GetFullSintThick()+ GetCuRadThick()) + // H cal
      GetFullSintThick() ; // last scintillator
    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; 
}

//______________________________________________________________________
AliEMCALGeometry *  AliEMCALGeometry::GetInstance(){ 
  // Returns the pointer of the unique instance
  
  return static_cast<AliEMCALGeometry *>( fgGeom ) ; 
}

//______________________________________________________________________
AliEMCALGeometry* AliEMCALGeometry::GetInstance(const Text_t* name,
						const Text_t* title){
    // Returns the pointer of the unique instance

    AliEMCALGeometry * rv = 0; 
    if ( fgGeom == 0 ) {
	if ( strcmp(name,"") == 0 ) rv = 0;
	else {    
	    fgGeom = new AliEMCALGeometry(name, title);
	    if ( fgInit ) rv = (AliEMCALGeometry * ) fgGeom;
	    else {
		rv = 0; 
		delete fgGeom; 
		fgGeom = 0; 
	    } // end if fgInit
	} // 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() ) ; 
	}else{
	  rv = (AliEMCALGeometry *) fgGeom; 
	} // end if
    }  // end if fgGeom
    return rv; 
}

//______________________________________________________________________
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 towers from the pre-showers.
    // 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;
}

//______________________________________________________________________
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);
    return;
}

//______________________________________________________________________
void AliEMCALGeometry::EtaPhiFromIndex(Int_t index,Float_t &eta,Float_t &phi) const {
    // 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]
    // 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 AliEMCALGeometry::TowerIndexFromEtaPhi(Float_t eta,Float_t phi) const {
    // returns the tower 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 // 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);
}

//______________________________________________________________________
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]

    return GetNEta()*GetNPhi()+TowerIndexFromEtaPhi(eta,phi);
}

//______________________________________________________________________
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
    // Input:
    //   Int_t AbsId // Tower index number [1-2*fNZ*fNPhi]
    // Outputs:
    //   Int_t *relid // array of 5. Discribed above.
    Bool_t rv  = kTRUE ;
    Int_t ieta=0,iphi=0,ipre=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;

    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();

    return;
}

//______________________________________________________________________
void AliEMCALGeometry::XYZFromIndex(const Int_t *relid,Float_t &x,Float_t &y, Float_t &z) const {
    // given the tower relative number it returns the X, Y and Z
    // of the tower.
    
    // Outputs:
    //   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
    //   none.
    
    Float_t eta,theta, phi,cyl_radius,kDeg2Rad;
    
    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;
    

    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();
    
    kDeg2Rad = TMath::Pi() / static_cast<Double_t>(180) ; 
    if ( ipre == -1 ) 
      cyl_radius = GetIP2PreShower() ;
    else 
      cyl_radius = GetIP2Tower() ;

    x =  cyl_radius * TMath::Cos(phi * kDeg2Rad ) ;
    y =  cyl_radius * TMath::Sin(phi * kDeg2Rad ) ; 
    z =  cyl_radius / 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
    // Outputs:
    //   none.
    // 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;
}
 */
Commit	Line	Data
2012850d	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id$*/
	17
	18	//_________________________________________________________________________
	19	// Geometry class for EMCAL : singleton
b13bbe81	20	// EMCAL consists of layers of scintillator and lead
ffa6d63b	21	// Places the the Barrel Geometry of The EMCAL at Midrapidity
	22	// between 0 and 120 degrees of Phi and
	23	// -0.7 to 0.7 in eta
	24	// Number of Modules and Layers may be controlled by
	25	// the name of the instance defined
	26	// EMCALArch2x has more modules along both phi and eta
	27	// EMCALArchxa has less Layers in the Radial Direction
b13bbe81	28	//*-- Author: Sahal Yacoob (LBL / UCT)
	29	// and : Yves Schutz (SUBATECH)
	30	// and : Jennifer Klay (LBL)
2012850d	31
	32	// --- ROOT system ---
	33
	34	// --- Standard library ---
bba4716c	35	#include <stdlib.h>
2012850d	36
2012850d	37	// --- AliRoot header files ---
ca8f5bd0	38	#include <TMath.h>
173558f2	39
ca8f5bd0	40	// -- ALICE Headers.
2012850d	41	#include "AliConst.h"
173558f2	42
ca8f5bd0	43	// --- EMCAL headers
ca8f5bd0	44	#include "AliEMCALGeometry.h"
2012850d	45
b13bbe81	46	ClassImp(AliEMCALGeometry);
2012850d	47
b13bbe81	48	AliEMCALGeometry *AliEMCALGeometry::fgGeom = 0;
b13bbe81	49	Bool_t AliEMCALGeometry::fgInit = kFALSE;
2012850d	50
b13bbe81	51	//______________________________________________________________________
	52	AliEMCALGeometry::~AliEMCALGeometry(void){
	53	// dtor
2012850d	54	}
b13bbe81	55	//______________________________________________________________________
	56	void AliEMCALGeometry::Init(void){
	57	// Initializes the EMCAL parameters
	58
e908f07f	59	fgInit = kFALSE; // Assume failer untill proven otherwise.
05a92d59	60
	61	TString name(GetName()) ;
	62
	63	if( name != "EMCALArch1a" &&
	64	name != "EMCALArch1b" &&
	65	name != "EMCALArch2a" &&
a63e0d5e	66	name != "EMCALArch2b" &&
	67	name != "EMCALArch1aN" ){
	68	Fatal("Init", "%s is not a known geometry (choose among EMCALArch1a, EMCALArch1b, EMCALArch2a and EMCALArch2b, EMCALArch1aN)", name.Data()) ;
b13bbe81	69	} // end if
e908f07f	70	//
05a92d59	71	if ( name == "EMCALArch1a" \|\|
a63e0d5e	72	name == "EMCALArch1b" \|\|
a63e0d5e	73	name == "EMCALArch1aN") {
a97849a9	74	fNZ = 96;
a97849a9	75	fNPhi = 144;
b13bbe81	76	} // end if
05a92d59	77	if ( name == "EMCALArch2a" \|\|
a97849a9	78	name == "EMCALArch2b" ) {
b13bbe81	79	fNZ = 112;
	80	fNPhi = 168;
	81	} // end if
05a92d59	82	if ( name == "EMCALArch1a" \|\|
05a92d59	83	name == "EMCALArch2a" ) {
a63e0d5e	84	fNPRLayers = 2;
	85	fNECLayers = 19;
	86	fNHCLayers = 0;
b13bbe81	87	} // end if
05a92d59	88	if ( name == "EMCALArch1b" \|\|
05a92d59	89	name == "EMCALArch2b" ) {
a63e0d5e	90	fNPRLayers = 2;
	91	fNECLayers = 23;
	92	fNHCLayers = 0;
b13bbe81	93	} // end if
a63e0d5e	94	if ( name == "EMCALArch1aN") {
	95	fNPRLayers = 2;
	96	fNECLayers = 19;
	97	fNHCLayers = 14;
	98	}
e908f07f	99
e908f07f	100	// geometry
6365f121	101	fArm1PhiMin = 60.0; // degrees, Starting EMCAL Phi position
6365f121	102	fArm1PhiMax = 180.0; // degrees, Ending EMCAL Phi position
e908f07f	103	fArm1EtaMin = -0.7; // pseudorapidity, Starting EMCAL Eta position
e908f07f	104	fArm1EtaMax = +0.7; // pseudorapidity, Ending EMCAL Eta position
a63e0d5e	105
	106	fAlFrontThick = 3.18; // cm, Thickness of front Al layer
	107	fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator
	108	fPbRadThickness = 0.5; // cm, Thickness of the Pb radiators.
	109	fPreShowerSintThick = 0.6; // cm, Thickness of the sintilator for the preshower part of the calorimeter
	110	fFullShowerSintThick = 0.5; // cm, Thickness of the sintilator for the dull shower part of the calorimeter
	111	fCuRadThickness = 0.0; // cm, Thickness of the Cu radiators.
	112
	113	if (name == "EMCALArch1aN") {
	114	fAlFrontThick = 3.0; // cm, Thickness of front Al layer
	115	fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator
	116	fPbRadThickness = 0.6; // cm, Thickness of the Pb radiators.
	117	fPreShowerSintThick = 0.5; // cm, Thickness of the sintilator for the preshower part of the calorimeter
	118	fFullShowerSintThick = 0.4; // cm, Thickness of the sintilator for the full shower part of the calorimeter
	119	fCuRadThickness = 1.0; // cm, Thickness of the Cu radiators.
	120	}
	121
e908f07f	122	fIPDistance = 454.0; // cm, Radial distance to inner surface of EMCAL
a63e0d5e	123	fShellThickness = fAlFrontThick + fGap2Active + 2.*(GetPreSintThick() + GetPbRadThick()) + // pre shower
	124	(fNECLayers-1)*(GetFullSintThick()+ GetPbRadThick()) + // E cal -1 because the last element is a scintillator
	125	fNHCLayers*(GetFullSintThick()+ GetCuRadThick()) + // H cal
	126	GetFullSintThick() ; // last scintillator
	127	fZLength = 2.*ZFromEtaR(fIPDistance+fShellThickness,fArm1EtaMax); // Z coverage
e908f07f	128	fEnvelop[0] = fIPDistance; // mother volume inner radius
	129	fEnvelop[1] = fIPDistance + fShellThickness; // mother volume outer r.
	130	fEnvelop[2] = 1.00001*fZLength; // add some padding for mother volume.
e908f07f	131	fgInit = kTRUE;
2012850d	132	}
173558f2	133
b13bbe81	134	//______________________________________________________________________
b13bbe81	135	AliEMCALGeometry * AliEMCALGeometry::GetInstance(){
05a92d59	136	// Returns the pointer of the unique instance
	137
	138	return static_cast<AliEMCALGeometry *>( fgGeom ) ;
2012850d	139	}
173558f2	140
b13bbe81	141	//______________________________________________________________________
	142	AliEMCALGeometry* AliEMCALGeometry::GetInstance(const Text_t* name,
	143	const Text_t* title){
	144	// Returns the pointer of the unique instance
	145
	146	AliEMCALGeometry * rv = 0;
	147	if ( fgGeom == 0 ) {
	148	if ( strcmp(name,"") == 0 ) rv = 0;
	149	else {
	150	fgGeom = new AliEMCALGeometry(name, title);
	151	if ( fgInit ) rv = (AliEMCALGeometry * ) fgGeom;
	152	else {
	153	rv = 0;
	154	delete fgGeom;
	155	fgGeom = 0;
	156	} // end if fgInit
	157	} // end if strcmp(name,"")
	158	}else{
	159	if ( strcmp(fgGeom->GetName(), name) != 0 ) {
9859bfc0	160	TString message("\n") ;
	161	message += "current geometry is " ;
	162	message += fgGeom->GetName() ;
	163	message += "\n you cannot call " ;
	164	message += name ;
	165	::Info("GetGeometry", message.Data() ) ;
b13bbe81	166	}else{
9859bfc0	167	rv = (AliEMCALGeometry *) fgGeom;
b13bbe81	168	} // end if
	169	} // end if fgGeom
	170	return rv;
2012850d	171	}
173558f2	172
ca8f5bd0	173	//______________________________________________________________________
a34b7b9f	174	Int_t AliEMCALGeometry::TowerIndex(Int_t ieta,Int_t iphi,Int_t ipre) const {
ca8f5bd0	175	// Returns the tower index number from the based on the Z and Phi
ca8f5bd0	176	// index numbers. There are 2 times the number of towers to separate
a97849a9	177	// out the full towers from the pre-showers.
ca8f5bd0	178	// Inputs:
e908f07f	179	// Int_t ieta // index allong z axis [1-fNZ]
ca8f5bd0	180	// Int_t iphi // index allong phi axis [1-fNPhi]
	181	// Int_t ipre // 0 = Full tower, 1 = Pre-shower tower only. [0,1]
	182	// Outputs:
	183	// none.
	184	// Returned
	185	// Int_t the absoulute tower index. [1-2fNZfNPhi]
	186	Int_t index;
	187
e908f07f	188	if((ieta<=0 \|\| ieta>GetNEta()) \|\| (iphi<=0 \|\| iphi>GetNPhi()) \|\|
ca8f5bd0	189	(ipre<0 \|\| ipre>1) ){
9859bfc0	190	TString message ("\n") ;
	191	message += "inputs out of range ieta= " ;
	192	message += ieta ;
	193	message += " [1-" ;
	194	message += GetNEta() ;
	195	message += "] iphi= " ;
	196	message += iphi ;
	197	message += " [1-" ;
	198	message += GetNPhi() ;
	199	message += "] ipre= " ;
	200	message += ipre ;
	201	message += "[0,1]. returning -1" ;
	202	Warning("TowerIndex", message.Data() ) ;
	203	return -1;
ca8f5bd0	204	} // end if
e908f07f	205	index = iphi + GetNPhi()(ieta-1) + ipre(GetNPhi()*GetNEta());
ca8f5bd0	206	return index;
ca8f5bd0	207	}
173558f2	208
ca8f5bd0	209	//______________________________________________________________________
e908f07f	210	void AliEMCALGeometry::TowerIndexes(Int_t index,Int_t &ieta,Int_t &iphi,
a34b7b9f	211	Int_t &ipre) const {
ca8f5bd0	212	// given the tower index number it returns the based on the Z and Phi
	213	// index numbers and if it is for the full tower or the pre-tower number.
	214	// There are 2 times the number of towers to separate
	215	// out the full towsers from the pre-towsers.
	216	// Inputs:
	217	// Int_t index // Tower index number [1-2fNZfNPhi]
	218	// Outputs:
e908f07f	219	// Int_t ieta // index allong z axis [1-fNZ]
ca8f5bd0	220	// Int_t iphi // index allong phi axis [1-fNPhi]
	221	// Int_t ipre // 0 = Full tower, 1 = Pre-shower tower only. [0,1]
	222	// Returned
	223	// none.
	224	Int_t itowers;
	225
e908f07f	226	itowers = GetNEta()*GetNPhi();
ca8f5bd0	227	if(index<1 \|\| index>2*itowers){
9859bfc0	228	TString message("\n") ;
	229	message += "index= " ;
	230	message += index ;
	231	message += " is out of range [1-" ;
	232	message += 2*itowers ;
	233	message += "], returning -1 for all." ;
	234	Warning("TowerIndex", message.Data() ) ;
	235	ieta = -1; iphi = -1; ipre = -1;
	236	return ;
ca8f5bd0	237	} // end if
	238	ipre = 0;
	239	if(index>itowers){ // pre shower indexs
	240	ipre = 1;
	241	index = index - itowers;
	242	} // end if
4b988fd2	243	ieta = 1+ (Int_t)((index-1)/GetNPhi());
4b988fd2	244	iphi = index - GetNPhi()*(ieta-1);
ca8f5bd0	245	return;
ca8f5bd0	246	}
173558f2	247
ca8f5bd0	248	//______________________________________________________________________
a34b7b9f	249	void AliEMCALGeometry::EtaPhiFromIndex(Int_t index,Float_t &eta,Float_t &phi) const {
ca8f5bd0	250	// given the tower index number it returns the based on the eta and phi
	251	// of the tower.
	252	// Inputs:
	253	// Int_t index // Tower index number [1-2fNZfNPhi]
	254	// Outputs:
	255	// Float_t eta // eta of center of tower in pseudorapidity
	256	// Float_t phi // phi of center of tower in degrees
	257	// Returned
	258	// none.
e908f07f	259	Int_t ieta,iphi,ipre;
e908f07f	260	Double_t deta,dphi,phid;
ca8f5bd0	261
e908f07f	262	TowerIndexes(index,ieta,iphi,ipre);
	263	deta = (GetArm1EtaMax()-GetArm1EtaMin())/((Float_t)GetNEta());
	264	eta = GetArm1EtaMin() + (((Float_t)ieta)-0.5)*deta;
	265	dphi = (GetArm1PhiMax() - GetArm1PhiMin())/((Float_t)GetNPhi()); // in degrees.
	266	phid = GetArm1PhiMin() + dphi*((Float_t)iphi -0.5);//iphi range [1-fNphi].
ca8f5bd0	267	phi = phid;
ca8f5bd0	268	}
173558f2	269
ca8f5bd0	270	//______________________________________________________________________
a34b7b9f	271	Int_t AliEMCALGeometry::TowerIndexFromEtaPhi(Float_t eta,Float_t phi) const {
ca8f5bd0	272	// returns the tower index number based on the eta and phi of the tower.
	273	// Inputs:
	274	// Float_t eta // eta of center of tower in pseudorapidity
	275	// Float_t phi // phi of center of tower in degrees
	276	// Outputs:
	277	// none.
	278	// Returned
	279	// Int_t index // Tower index number [1-fNZ*fNPhi]
e908f07f	280	Int_t ieta,iphi;
ca8f5bd0	281
e908f07f	282	ieta = 1 + (Int_t)(((Float_t)GetNEta())*(eta-GetArm1EtaMin())/
	283	(GetArm1EtaMax() - GetArm1EtaMin()));
	284	if(ieta<=0 \|\| ieta>GetNEta()){
9859bfc0	285	TString message("\n") ;
	286	message += "ieta = " ;
	287	message += ieta ;
	288	message += " eta=" ;
	289	message += eta ;
	290	message += " is outside of EMCAL. etamin=" ;
	291	message += GetArm1EtaMin() ;
	292	message += " to etamax=" ;
	293	message += GetArm1EtaMax();
	294	message += " returning -1";
	295	Warning("TowerIndexFromEtaPhi", message.Data() ) ;
	296	return -1;
ca8f5bd0	297	} // end if
e908f07f	298	iphi = 1 + (Int_t)(((Float_t)GetNPhi())*(phi-GetArm1PhiMin())/
e908f07f	299	((Float_t)(GetArm1PhiMax() - GetArm1PhiMin())));
ca8f5bd0	300	if(iphi<=0 \|\| iphi>GetNPhi()){
9859bfc0	301	TString message("\n") ;
	302	message += "iphi=" ;
	303	message += iphi ;
	304	message += "phi= " ;
	305	message += phi ;
	306	message += " is outside of EMCAL." ;
	307	message += " Phimin=" ;
	308	message += GetArm1PhiMin() ;
	309	message += " PhiMax=" ;
	310	message += GetArm1PhiMax() ;
	311	message += " returning -1" ;
	312	Warning("TowerIndexFromEtaPhi", message.Data() ) ;
	313	return -1;
ca8f5bd0	314	} // end if
e908f07f	315	return TowerIndex(ieta,iphi,0);
ca8f5bd0	316	}
173558f2	317
ca8f5bd0	318	//______________________________________________________________________
a34b7b9f	319	Int_t AliEMCALGeometry::PreTowerIndexFromEtaPhi(Float_t eta,Float_t phi) const {
ca8f5bd0	320	// returns the pretower index number based on the eta and phi of the tower.
	321	// Inputs:
	322	// Float_t eta // eta of center of tower in pseudorapidity
	323	// Float_t phi // phi of center of tower in degrees
	324	// Outputs:
	325	// none.
	326	// Returned
	327	// Int_t index // PreTower index number [fNZfNPhi-2fNZ*fNPhi]
	328
e908f07f	329	return GetNEta()*GetNPhi()+TowerIndexFromEtaPhi(eta,phi);
ca8f5bd0	330	}
173558f2	331
ca8f5bd0	332	//______________________________________________________________________
a34b7b9f	333	Bool_t AliEMCALGeometry::AbsToRelNumbering(Int_t AbsId, Int_t *relid) const {
ca8f5bd0	334	// Converts the absolute numbering into the following array/
5a9318ff	335	// relid[0] = EMCAL Arm number 1:1
ca8f5bd0	336	// relid[1] = 0 Not in Pre Shower layers
	337	// = -1 In Pre Shower
	338	// relid[2] = Row number inside EMCAL
	339	// relid[3] = Column number inside EMCAL
	340	// Input:
	341	// Int_t AbsId // Tower index number [1-2fNZfNPhi]
	342	// Outputs:
	343	// Int_t *relid // array of 5. Discribed above.
	344	Bool_t rv = kTRUE ;
e908f07f	345	Int_t ieta=0,iphi=0,ipre=0,index=AbsId;
ca8f5bd0	346
e908f07f	347	TowerIndexes(index,ieta,iphi,ipre);
ca8f5bd0	348	relid[0] = 1;
ca8f5bd0	349	relid[1] = 0;
5a9318ff	350	if(ipre==1)
5a9318ff	351	relid[1] = -1;
e908f07f	352	relid[2] = ieta;
ca8f5bd0	353	relid[3] = iphi;
	354
	355	return rv;
	356	}
173558f2	357
ca8f5bd0	358	//______________________________________________________________________
5a9318ff	359	void AliEMCALGeometry::PosInAlice(const Int_t *relid,Float_t &theta,
a34b7b9f	360	Float_t &phi) const {
5a9318ff	361	// Converts the relative numbering into the local EMCAL-module (x, z)
ca8f5bd0	362	// coordinates
e908f07f	363	Int_t ieta = relid[2]; // offset along x axis
ca8f5bd0	364	Int_t iphi = relid[3]; // offset along z axis
5a9318ff	365	Int_t ipre = relid[1]; // indicates -1 preshower, or 0 full tower.
ca8f5bd0	366	Int_t index;
	367	Float_t eta;
	368
	369	if(ipre==-1) ipre = 1;
e908f07f	370	index = TowerIndex(ieta,iphi,ipre);
ca8f5bd0	371	EtaPhiFromIndex(index,eta,phi);
	372	theta = 180.(2.0TMath::ATan(TMath::Exp(-eta)))/TMath::Pi();
	373
	374	return;
	375	}
6119e5db	376
	377	//______________________________________________________________________
	378	void AliEMCALGeometry::XYZFromIndex(const Int_t *relid,Float_t &x,Float_t &y, Float_t &z) const {
	379	// given the tower relative number it returns the X, Y and Z
	380	// of the tower.
	381
	382	// Outputs:
	383	// Float_t x // x of center of tower in cm
	384	// Float_t y // y of center of tower in cm
	385	// Float_t z // z of centre of tower in cm
	386	// Returned
	387	// none.
	388
	389	Float_t eta,theta, phi,cyl_radius,kDeg2Rad;
	390
	391	Int_t ieta = relid[2]; // offset along x axis
	392	Int_t iphi = relid[3]; // offset along z axis
	393	Int_t ipre = relid[1]; // indicates -1 preshower, or 0 full tower.
	394	Int_t index;
	395
	396
	397	if(ipre==-1) ipre = 1;
	398	index = TowerIndex(ieta,iphi,ipre);
	399	EtaPhiFromIndex(index,eta,phi);
	400	theta = 180.(2.0TMath::ATan(TMath::Exp(-eta)))/TMath::Pi();
6119e5db	401
6119e5db	402	kDeg2Rad = TMath::Pi() / static_cast<Double_t>(180) ;
a97849a9	403	if ( ipre == -1 )
	404	cyl_radius = GetIP2PreShower() ;
	405	else
	406	cyl_radius = GetIP2Tower() ;
	407
6119e5db	408	x = cyl_radius * TMath::Cos(phi * kDeg2Rad ) ;
f6eaf97a	409	y = cyl_radius * TMath::Sin(phi * kDeg2Rad ) ;
6119e5db	410	z = cyl_radius / TMath::Tan(theta * kDeg2Rad ) ;
	411
	412	return;
	413	}
	414
ca8f5bd0	415	//______________________________________________________________________
ca8f5bd0	416	/*
a34b7b9f	417	Boot_t AliEMCALGeometry::AreNeighbours(Int_t index1,Int_t index2) const {
ca8f5bd0	418	// Returns kTRUE if the two towers are neighbours or not, including
	419	// diagonals. Both indexes are required to be either towers or preshower.
	420	// Inputs:
	421	// Int_t index1 // index of tower 1
	422	// Int_t index2 // index of tower 2
	423	// Outputs:
	424	// none.
	425	// Returned
	426	// Boot_t kTRUE if the towers are neighbours otherwise false.
	427	Boot_t anb = kFALSE;
e908f07f	428	Int_t ieta1 = 0, ieta2 = 0, iphi1 = 0, iphi2 = 0, ipre1 = 0, ipre2 = 0;
ca8f5bd0	429
e908f07f	430	TowerIndexes(index1,ieta1,iphi1,ipre1);
e908f07f	431	TowerIndexes(index2,ieta2,iphi2,ipre2);
ca8f5bd0	432	if(ipre1!=ipre2) return anb;
e908f07f	433	if((ieta1>=ieta2-1 && ieta1<=ieta2+1) && (iphi1>=iphi2-1 &&iphi1<=iphi2+1))
ca8f5bd0	434	anb = kTRUE;
	435	return anb;
	436	}
	437	*/