[u/mrichter/AliRoot.git] / PHOS / AliPHOSGeometry.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 PHOS : singleton  
// PHOS consists of the electromagnetic calorimeter (EMCA)
// and a charged particle veto either in the Subatech's version (PPSD)
// or in the IHEP's one (CPV).
// The EMCA/PPSD/CPV modules are parametrized so that any configuration
// can be easily implemented 
// The title is used to identify the version of CPV used.
//                  
//*-- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (RRC "KI" & SUBATECH)

// --- ROOT system ---

#include "TVector3.h"
#include "TRotation.h" 
#include "TFolder.h" 
#include "TROOT.h" 

// --- Standard library ---

#include <stdlib.h>

// --- AliRoot header files ---

#include "AliPHOSGeometry.h"
#include "AliPHOSEMCAGeometry.h" 
#include "AliPHOSRecPoint.h"
#include "AliConst.h"

ClassImp(AliPHOSGeometry) ;

// these initialisations are needed for a singleton
AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ;
Bool_t            AliPHOSGeometry::fgInit = kFALSE ;

//____________________________________________________________________________
AliPHOSGeometry::AliPHOSGeometry(void)
{
  // default ctor 
  // must be kept public for root persistency purposes,
  // but should never be called by the outside world
  fPHOSAngle      = 0 ;
  fGeometryEMCA   = 0;
  fGeometrySUPP   = 0;
  fGeometryCPV    = 0;
  fgGeom          = 0;
  fRotMatrixArray = 0;
}
//____________________________________________________________________________
AliPHOSGeometry::~AliPHOSGeometry(void)
{
  // dtor

  if (fRotMatrixArray) fRotMatrixArray->Delete() ; 
  if (fRotMatrixArray) delete fRotMatrixArray ; 
  if (fPHOSAngle     ) delete[] fPHOSAngle ; 
}
//____________________________________________________________________________

void AliPHOSGeometry::Init(void)
{
  // Initializes the PHOS parameters :
  //  IHEP is the Protvino CPV (cathode pad chambers)
  //  GPS2 is the Subatech Pre-Shower (two micromegas sandwiching a passive lead converter)
  //  MIXT 4 PHOS modules withe the IHEP CPV and one PHOS module with the Subatech Pre-Shower
  
  TString test(GetName()) ; 
  if (test != "IHEP" && test != "GPS2" && test != "MIXT") {
    Fatal("Init", "%s is not a known geometry (choose among IHEP, GPS2 and MIXT)", test.Data() ) ; 
  }

  fgInit     = kTRUE ; 
  
  fNModules     = 5;
  fAngle        = 20;
  
  fGeometryEMCA = new AliPHOSEMCAGeometry();
  
  fGeometryCPV  = new AliPHOSCPVGeometry ();
  
  fGeometrySUPP = new AliPHOSSupportGeometry();
  
  fPHOSAngle = new Float_t[fNModules] ;
  
  Float_t * emcParams = fGeometryEMCA->GetEMCParams() ;
  
  fPHOSParams[0] =  TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2., 
			       (Double_t)(emcParams[0]*(fGeometryCPV->GetCPVBoxSize(1)+emcParams[3]) - 
				emcParams[1]* fGeometryCPV->GetCPVBoxSize(1))/emcParams[3] ) ;
  fPHOSParams[1] = emcParams[1] ;
  fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.);
  fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ;
  
  fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ;
  
  Int_t index ;
  for ( index = 0; index < fNModules; index++ )
    fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry()
  
  this->SetPHOSAngles() ; 
  fRotMatrixArray = new TObjArray(fNModules) ; 
  
}

//____________________________________________________________________________
AliPHOSGeometry *  AliPHOSGeometry::GetInstance() 
{ 
  // Returns the pointer of the unique instance; singleton specific
  
  return static_cast<AliPHOSGeometry *>( fgGeom ) ; 
}

//____________________________________________________________________________
AliPHOSGeometry *  AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) 
{
  // Returns the pointer of the unique instance
  // Creates it with the specified options (name, title) if it does not exist yet

  AliPHOSGeometry * rv = 0  ; 
  if ( fgGeom == 0 ) {
    if ( strcmp(name,"") == 0 ) 
      rv = 0 ;
    else {    
      fgGeom = new AliPHOSGeometry(name, title) ;
      if ( fgInit )
	rv = (AliPHOSGeometry * ) fgGeom ;
      else {
	rv = 0 ; 
	delete fgGeom ; 
	fgGeom = 0 ; 
      }
    }
  }
  else {
    if ( strcmp(fgGeom->GetName(), name) != 0 ) 
      ::Error("GetInstance", "Current geometry is %s. You cannot call %s", fgGeom->GetName(), name) ; 
    else
      rv = (AliPHOSGeometry *) fgGeom ; 
  } 
  return rv ; 
}

//____________________________________________________________________________
void AliPHOSGeometry::SetPHOSAngles() 
{ 
  // Calculates the position of the PHOS modules in ALICE global coordinate system
  
  Double_t const kRADDEG = 180.0 / kPI ;
  Float_t pphi =  2 * TMath::ATan( GetOuterBoxSize(0)  / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ;
  pphi *= kRADDEG ;
  if (pphi > fAngle){ 
    Error("SetPHOSAngles", "PHOS modules overlap!\n pphi = %f fAngle = %f", pphi, fAngle);

  }
  pphi = fAngle;
  
  for( Int_t i = 1; i <= fNModules ; i++ ) {
    Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ;
    fPHOSAngle[i-1] = -  angle ;
  } 
}

//____________________________________________________________________________
Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid) const
{
  // Converts the absolute numbering into the following array/
  //  relid[0] = PHOS Module number 1:fNModules 
  //  relid[1] = 0 if PbW04
  //           = -1 if CPV
  //  relid[2] = Row number inside a PHOS module
  //  relid[3] = Column number inside a PHOS module

  Bool_t rv  = kTRUE ; 
  Float_t id = AbsId ;

  Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ; 
  
  if ( phosmodulenumber >  GetNModules() ) { // it is a CPV pad
    
    id -=  GetNPhi() * GetNZ() *  GetNModules() ; 
    Float_t nCPV  = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ;
    relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ;
    relid[1] = -1 ;
    id -= ( relid[0] - 1 ) * nCPV ; 
    relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ;
    relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ; 
  } 
  else { // it is a PW04 crystal

    relid[0] = phosmodulenumber ;
    relid[1] = 0 ;
    id -= ( phosmodulenumber - 1 ) *  GetNPhi() * GetNZ() ; 
    relid[2] = (Int_t)TMath::Ceil( id / GetNZ() )  ;
    relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNZ() ) ; 
  } 
  return rv ; 
}

//____________________________________________________________________________  
void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) const 
{
  // calculates the angular coverage in theta and phi of one EMC (=PHOS) module

 Double_t conv ; 
  if ( opt == Radian() ) 
    conv = 1. ; 
  else if ( opt == Degre() )
    conv = 180. / TMath::Pi() ; 
  else {
    Warning("EmcModuleCoverage", "%s unknown option; result in radian", opt) ; 
    conv = 1. ;
      }

  Float_t phi = GetPHOSAngle(mod) *  (TMath::Pi() / 180.)  ;  
  Float_t y0  = GetIPtoCrystalSurface() ; 
  Float_t x0  = GetCellStep()*GetNPhi() ;
  Float_t z0  = GetCellStep()*GetNZ();
  Double_t angle = TMath::ATan( x0 / y0 / 2 ) ;
  phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 220 and 320 deg.)
  Double_t max  = phi - angle ;
  Double_t min   = phi + angle ;
  pM = TMath::Max(max, min) * conv ;
  pm = TMath::Min(max, min) * conv ; 
  
  angle =  TMath::ATan( z0 /  y0  / 2 ) ;
  max  = TMath::Pi() / 2.  + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.)
  min  = TMath::Pi() / 2.  - angle ;
  tM = TMath::Max(max, min) * conv ;
  tm = TMath::Min(max, min) * conv ; 
 
}

//____________________________________________________________________________  
void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) const
{
  // calculates the angular coverage in theta and phi of a single crystal in a EMC(=PHOS) module

  Double_t conv ; 
  if ( opt == Radian() ) 
    conv = 1. ; 
  else if ( opt == Degre() )
    conv = 180. / TMath::Pi() ; 
  else {
    Warning("EmcXtalCoverage", "%s unknown option; result in radian", opt) ;  
    conv = 1. ;
      }

  Float_t y0  = GetIPtoCrystalSurface() ; 
  theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ;
  phi   = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ;
}
 

//____________________________________________________________________________
void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat) const
{
  // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system
 
  AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;  
  TVector3 localposition ;

  tmpPHOS->GetLocalPosition(gpos) ;


  if ( tmpPHOS->IsEmc() ) // it is a EMC crystal 
    {  gpos.SetY( - GetIPtoCrystalSurface()) ;  

    }
  else
    { // it is a CPV
      gpos.SetY(- GetIPtoUpperCPVsurface()  ) ; 
    }  

  Float_t phi           = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; 
  Double_t const kRADDEG = 180.0 / kPI ;
  Float_t rphi          = phi / kRADDEG ; 
  
  TRotation rot ;
  rot.RotateZ(-rphi) ; // a rotation around Z by angle  
  
  TRotation dummy = rot.Invert() ;  // to transform from original frame to rotate frame
  gpos.Transform(rot) ; // rotate the baby 

}

//____________________________________________________________________________
void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const 
{
  // Calculates the coordinates of a RecPoint in the ALICE global coordinate system 

  AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;  
  TVector3 localposition ;
  tmpPHOS->GetLocalPosition(gpos) ;


  if ( tmpPHOS->IsEmc() ) // it is a EMC crystal 
    {  gpos.SetY( - GetIPtoCrystalSurface()  ) ;  
    }
  else
    { // it is a CPV
	  gpos.SetY(- GetIPtoUpperCPVsurface()  ) ; 
    }  

  Float_t phi           = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; 
  Double_t const kRADDEG = 180.0 / kPI ;
  Float_t rphi          = phi / kRADDEG ; 
  
  TRotation rot ;
  rot.RotateZ(-rphi) ; // a rotation around Z by angle  
  
  TRotation dummy = rot.Invert() ;  // to transform from original frame to rotate frame
  gpos.Transform(rot) ; // rotate the baby 
}

//____________________________________________________________________________
void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x) const
{
  // calculates the impact coordinates on PHOS of a neutral particle  
  // emitted in the direction theta and phi in the ALICE global coordinate system

  // searches for the PHOS EMC module
  ModuleNumber = 0 ; 
  Double_t tm, tM, pm, pM ; 
  Int_t index = 1 ; 
  while ( ModuleNumber == 0 && index <= GetNModules() ) { 
    EmcModuleCoverage(index, tm, tM, pm, pM) ; 
    if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) ) 
      ModuleNumber = index ; 
    index++ ;    
  }
  if ( ModuleNumber != 0 ) {
    Float_t phi0 =  GetPHOSAngle(ModuleNumber) *  (TMath::Pi() / 180.) + 1.5 * TMath::Pi()  ;  
    Float_t y0  =  GetIPtoCrystalSurface()  ;   
    Double_t angle = phi - phi0; 
    x = y0 * TMath::Tan(angle) ; 
    angle = theta - TMath::Pi() / 2 ; 
    z = y0 * TMath::Tan(angle) ; 
  }
}

//____________________________________________________________________________
Bool_t  AliPHOSGeometry::Impact(const TParticle * particle) const 
{
  // Check if a particle being propagates from IP along the straight line impacts EMC

  Bool_t in=kFALSE;
  Int_t moduleNumber=0;
  Double_t z,x;
  ImpactOnEmc(particle->Theta(),particle->Phi(),moduleNumber,z,x);
  if(moduleNumber) in=kTRUE;
  else in=kFALSE;
  return in;
}

//____________________________________________________________________________
Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t &  AbsId) const
{
  // Converts the relative numbering into the absolute numbering
  // EMCA crystals:
  //  AbsId = from 1 to fNModules * fNPhi * fNZ
  // CPV pad:
  //  AbsId = from N(total PHOS crystals) + 1
  //          to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ

  Bool_t rv = kTRUE ; 
  
  if ( relid[1] ==  0 ) {                            // it is a Phos crystal
    AbsId =
      ( relid[0] - 1 ) * GetNPhi() * GetNZ()         // the offset of PHOS modules
      + ( relid[2] - 1 ) * GetNZ()                   // the offset along phi
      +   relid[3] ;                                 // the offset along z
  }
  else { // it is a CPV pad
    AbsId =    GetNPhi() * GetNZ() *  GetNModules()         // the offset to separate EMCA crystals from CPV pads
      + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ()   // the pads offset of PHOS modules 
      + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ()                             // the pads offset of a CPV row
      +   relid[3] ;                                                         // the column number
  }
  
  return rv ; 
}

//____________________________________________________________________________
void AliPHOSGeometry::RelPosToAbsId(const Int_t module , const Double_t x, const Double_t z, Int_t & AbsId)const{
  // Converts local PHOS-module (x, z) coordinates to absId 

  if(!module){
    AbsId = 0 ;
    return ;
  }
  
  Int_t relid[4] ;
  relid[0] = module ;
  relid[1] = 0 ;
  relid[2] = static_cast<Int_t>(TMath::Ceil(GetNPhi()/2.+ x/GetCellStep()));
  relid[3] = static_cast<Int_t>(TMath::Ceil(GetNZ()/2.  - z/GetCellStep())) ;

  RelToAbsNumbering(relid,AbsId) ;

}
//____________________________________________________________________________
void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos ) const
{
  // Converts the absolute numbering into the global ALICE coordinate system
  
    
    Int_t relid[4] ;
    
    AbsToRelNumbering(id , relid) ;
    
    Int_t phosmodule = relid[0] ; 
    
    Float_t y0 = 0 ; 
    
    if ( relid[1] == 0 )  // it is a PbW04 crystal 
      y0 =  - GetIPtoCrystalSurface() ;  
    else
      y0 =  - GetIPtoUpperCPVsurface() ; 

    Float_t x, z ; 
    RelPosInModule(relid, x, z) ; 
    
    pos.SetX(x) ;
    pos.SetZ(z) ;
    pos.SetY(y0) ;
    
    Float_t phi           = GetPHOSAngle( phosmodule) ; 
    Double_t const kRADDEG = 180.0 / kPI ;
    Float_t rphi          = phi / kRADDEG ; 
    
    TRotation rot ;
    rot.RotateZ(-rphi) ; // a rotation around Z by angle  
    
    TRotation dummy = rot.Invert() ;  // to transform from original frame to rotate frame
    
    pos.Transform(rot) ; // rotate the baby 
} 

//____________________________________________________________________________
void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const 
{
  // Converts the relative numbering into the local PHOS-module (x, z) coordinates
  // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000)
  
  Int_t row        = relid[2] ; //offset along x axis
  Int_t column     = relid[3] ; //offset along z axis

  
  if ( relid[1] == 0 ) { // its a PbW04 crystal
    x = - ( GetNPhi()/2. - row    + 0.5 ) *  GetCellStep() ; // position of Xtal with respect
    z =   ( GetNZ()  /2. - column + 0.5 ) *  GetCellStep() ; // of center of PHOS module  
  }  
  else  {    
    x = - ( GetNumberOfCPVPadsPhi()/2. - row    - 0.5 ) * GetPadSizePhi()  ; // position of pad  with respect
    z =   ( GetNumberOfCPVPadsZ()  /2. - column - 0.5 ) * GetPadSizeZ()  ; // of center of PHOS module  
  }
}
Commit	Line	Data
d15a28e7	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
b2a60966	16	/* $Id$ */
b2a60966	17
d15a28e7	18	//_________________________________________________________________________
b2a60966	19	// Geometry class for PHOS : singleton
a3dfe79c	20	// PHOS consists of the electromagnetic calorimeter (EMCA)
	21	// and a charged particle veto either in the Subatech's version (PPSD)
	22	// or in the IHEP's one (CPV).
	23	// The EMCA/PPSD/CPV modules are parametrized so that any configuration
	24	// can be easily implemented
	25	// The title is used to identify the version of CPV used.
b2a60966	26	//
710f859a	27	//*-- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (RRC "KI" & SUBATECH)
d15a28e7	28
	29	// --- ROOT system ---
	30
	31	#include "TVector3.h"
	32	#include "TRotation.h"
fa7cce36	33	#include "TFolder.h"
fa7cce36	34	#include "TROOT.h"
d15a28e7	35
	36	// --- Standard library ---
	37
4410223b	38	#include <stdlib.h>
d15a28e7	39
	40	// --- AliRoot header files ---
	41
	42	#include "AliPHOSGeometry.h"
468794ea	43	#include "AliPHOSEMCAGeometry.h"
710f859a	44	#include "AliPHOSRecPoint.h"
d15a28e7	45	#include "AliConst.h"
d15a28e7	46
9ec91567	47	ClassImp(AliPHOSGeometry) ;
d15a28e7	48
a4e98857	49	// these initialisations are needed for a singleton
9ec91567	50	AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ;
282c5906	51	Bool_t AliPHOSGeometry::fgInit = kFALSE ;
9ec91567	52
0bc3b8ed	53	//____________________________________________________________________________
	54	AliPHOSGeometry::AliPHOSGeometry(void)
	55	{
	56	// default ctor
	57	// must be kept public for root persistency purposes,
	58	// but should never be called by the outside world
	59	fPHOSAngle = 0 ;
	60	fGeometryEMCA = 0;
	61	fGeometrySUPP = 0;
	62	fGeometryCPV = 0;
	63	fgGeom = 0;
	64	fRotMatrixArray = 0;
	65	}
d15a28e7	66	//____________________________________________________________________________
	67	AliPHOSGeometry::~AliPHOSGeometry(void)
	68	{
b2a60966	69	// dtor
b2a60966	70
52a36ffd	71	if (fRotMatrixArray) fRotMatrixArray->Delete() ;
52a36ffd	72	if (fRotMatrixArray) delete fRotMatrixArray ;
fa0bc588	73	if (fPHOSAngle ) delete[] fPHOSAngle ;
52a36ffd	74	}
52a36ffd	75	//____________________________________________________________________________
	76
	77	void AliPHOSGeometry::Init(void)
	78	{
a4e98857	79	// Initializes the PHOS parameters :
	80	// IHEP is the Protvino CPV (cathode pad chambers)
	81	// GPS2 is the Subatech Pre-Shower (two micromegas sandwiching a passive lead converter)
809cd394	82	// MIXT 4 PHOS modules withe the IHEP CPV and one PHOS module with the Subatech Pre-Shower
710f859a	83
809cd394	84	TString test(GetName()) ;
809cd394	85	if (test != "IHEP" && test != "GPS2" && test != "MIXT") {
f1611b7c	86	Fatal("Init", "%s is not a known geometry (choose among IHEP, GPS2 and MIXT)", test.Data() ) ;
809cd394	87	}
809cd394	88
710f859a	89	fgInit = kTRUE ;
	90
	91	fNModules = 5;
	92	fAngle = 20;
	93
	94	fGeometryEMCA = new AliPHOSEMCAGeometry();
	95
	96	fGeometryCPV = new AliPHOSCPVGeometry ();
	97
	98	fGeometrySUPP = new AliPHOSSupportGeometry();
	99
	100	fPHOSAngle = new Float_t[fNModules] ;
	101
	102	Float_t * emcParams = fGeometryEMCA->GetEMCParams() ;
	103
581e32d4	104	fPHOSParams[0] = TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2.,
581e32d4	105	(Double_t)(emcParams[0]*(fGeometryCPV->GetCPVBoxSize(1)+emcParams[3]) -
710f859a	106	emcParams[1]* fGeometryCPV->GetCPVBoxSize(1))/emcParams[3] ) ;
710f859a	107	fPHOSParams[1] = emcParams[1] ;
581e32d4	108	fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.);
710f859a	109	fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ;
	110
	111	fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ;
	112
	113	Int_t index ;
	114	for ( index = 0; index < fNModules; index++ )
52a36ffd	115	fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry()
710f859a	116
	117	this->SetPHOSAngles() ;
	118	fRotMatrixArray = new TObjArray(fNModules) ;
	119
52a36ffd	120	}
	121
	122	//____________________________________________________________________________
	123	AliPHOSGeometry * AliPHOSGeometry::GetInstance()
	124	{
a4e98857	125	// Returns the pointer of the unique instance; singleton specific
a4e98857	126
809cd394	127	return static_cast<AliPHOSGeometry *>( fgGeom ) ;
52a36ffd	128	}
	129
	130	//____________________________________________________________________________
	131	AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title)
	132	{
	133	// Returns the pointer of the unique instance
a4e98857	134	// Creates it with the specified options (name, title) if it does not exist yet
a4e98857	135
52a36ffd	136	AliPHOSGeometry * rv = 0 ;
	137	if ( fgGeom == 0 ) {
	138	if ( strcmp(name,"") == 0 )
	139	rv = 0 ;
	140	else {
	141	fgGeom = new AliPHOSGeometry(name, title) ;
	142	if ( fgInit )
	143	rv = (AliPHOSGeometry * ) fgGeom ;
	144	else {
	145	rv = 0 ;
	146	delete fgGeom ;
	147	fgGeom = 0 ;
	148	}
	149	}
	150	}
	151	else {
21cd0c07	152	if ( strcmp(fgGeom->GetName(), name) != 0 )
21cd0c07	153	::Error("GetInstance", "Current geometry is %s. You cannot call %s", fgGeom->GetName(), name) ;
52a36ffd	154	else
	155	rv = (AliPHOSGeometry *) fgGeom ;
	156	}
	157	return rv ;
	158	}
4697edca	159
52a36ffd	160	//____________________________________________________________________________
	161	void AliPHOSGeometry::SetPHOSAngles()
	162	{
a4e98857	163	// Calculates the position of the PHOS modules in ALICE global coordinate system
52a36ffd	164
52a36ffd	165	Double_t const kRADDEG = 180.0 / kPI ;
710f859a	166	Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ;
52a36ffd	167	pphi *= kRADDEG ;
710f859a	168	if (pphi > fAngle){
21cd0c07	169	Error("SetPHOSAngles", "PHOS modules overlap!\n pphi = %f fAngle = %f", pphi, fAngle);
710f859a	170
710f859a	171	}
ed4205d8	172	pphi = fAngle;
52a36ffd	173
52a36ffd	174	for( Int_t i = 1; i <= fNModules ; i++ ) {
ed4205d8	175	Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ;
52a36ffd	176	fPHOSAngle[i-1] = - angle ;
52a36ffd	177	}
d15a28e7	178	}
	179
	180	//____________________________________________________________________________
7b7c1533	181	Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid) const
d15a28e7	182	{
b2a60966	183	// Converts the absolute numbering into the following array/
	184	// relid[0] = PHOS Module number 1:fNModules
	185	// relid[1] = 0 if PbW04
710f859a	186	// = -1 if CPV
	187	// relid[2] = Row number inside a PHOS module
	188	// relid[3] = Column number inside a PHOS module
d15a28e7	189
d15a28e7	190	Bool_t rv = kTRUE ;
92862013	191	Float_t id = AbsId ;
d15a28e7	192
710f859a	193	Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ;
d15a28e7	194
710f859a	195	if ( phosmodulenumber > GetNModules() ) { // it is a CPV pad
	196
	197	id -= GetNPhi() * GetNZ() * GetNModules() ;
	198	Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ;
	199	relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ;
	200	relid[1] = -1 ;
	201	id -= ( relid[0] - 1 ) * nCPV ;
	202	relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ;
	203	relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ;
d15a28e7	204	}
710f859a	205	else { // it is a PW04 crystal
d15a28e7	206
92862013	207	relid[0] = phosmodulenumber ;
	208	relid[1] = 0 ;
	209	id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ;
710f859a	210	relid[2] = (Int_t)TMath::Ceil( id / GetNZ() ) ;
710f859a	211	relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNZ() ) ;
d15a28e7	212	}
	213	return rv ;
	214	}
52a36ffd	215
9f616d61	216	//____________________________________________________________________________
7b7c1533	217	void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) const
9f616d61	218	{
a4e98857	219	// calculates the angular coverage in theta and phi of one EMC (=PHOS) module
9f616d61	220
9f616d61	221	Double_t conv ;
cf0c2bc1	222	if ( opt == Radian() )
9f616d61	223	conv = 1. ;
cf0c2bc1	224	else if ( opt == Degre() )
9f616d61	225	conv = 180. / TMath::Pi() ;
9f616d61	226	else {
21cd0c07	227	Warning("EmcModuleCoverage", "%s unknown option; result in radian", opt) ;
9f616d61	228	conv = 1. ;
	229	}
	230
710f859a	231	Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ;
710f859a	232	Float_t y0 = GetIPtoCrystalSurface() ;
5868a791	233	Float_t x0 = GetCellStep()*GetNPhi() ;
	234	Float_t z0 = GetCellStep()*GetNZ();
	235	Double_t angle = TMath::ATan( x0 / y0 / 2 ) ;
710f859a	236	phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 220 and 320 deg.)
92862013	237	Double_t max = phi - angle ;
	238	Double_t min = phi + angle ;
	239	pM = TMath::Max(max, min) * conv ;
	240	pm = TMath::Min(max, min) * conv ;
9f616d61	241
5868a791	242	angle = TMath::ATan( z0 / y0 / 2 ) ;
92862013	243	max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.)
	244	min = TMath::Pi() / 2. - angle ;
	245	tM = TMath::Max(max, min) * conv ;
	246	tm = TMath::Min(max, min) * conv ;
9f616d61	247
	248	}
	249
	250	//____________________________________________________________________________
7b7c1533	251	void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) const
9f616d61	252	{
a4e98857	253	// calculates the angular coverage in theta and phi of a single crystal in a EMC(=PHOS) module
9f616d61	254
9f616d61	255	Double_t conv ;
cf0c2bc1	256	if ( opt == Radian() )
9f616d61	257	conv = 1. ;
cf0c2bc1	258	else if ( opt == Degre() )
9f616d61	259	conv = 180. / TMath::Pi() ;
9f616d61	260	else {
21cd0c07	261	Warning("EmcXtalCoverage", "%s unknown option; result in radian", opt) ;
9f616d61	262	conv = 1. ;
	263	}
	264
710f859a	265	Float_t y0 = GetIPtoCrystalSurface() ;
92862013	266	theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ;
92862013	267	phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ;
9f616d61	268	}
	269
	270
	271	//____________________________________________________________________________
52a36ffd	272	void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat) const
d15a28e7	273	{
a4e98857	274	// Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system
b2a60966	275
d15a28e7	276	AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
92862013	277	TVector3 localposition ;
d15a28e7	278
	279	tmpPHOS->GetLocalPosition(gpos) ;
	280
	281
	282	if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
710f859a	283	{ gpos.SetY( - GetIPtoCrystalSurface()) ;
d15a28e7	284
	285	}
	286	else
710f859a	287	{ // it is a CPV
710f859a	288	gpos.SetY(- GetIPtoUpperCPVsurface() ) ;
d15a28e7	289	}
d15a28e7	290
92862013	291	Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
	292	Double_t const kRADDEG = 180.0 / kPI ;
	293	Float_t rphi = phi / kRADDEG ;
d15a28e7	294
92862013	295	TRotation rot ;
92862013	296	rot.RotateZ(-rphi) ; // a rotation around Z by angle
d15a28e7	297
92862013	298	TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
92862013	299	gpos.Transform(rot) ; // rotate the baby
6ad0bfa0	300
d15a28e7	301	}
	302
	303	//____________________________________________________________________________
5cda30f6	304	void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const
d15a28e7	305	{
a4e98857	306	// Calculates the coordinates of a RecPoint in the ALICE global coordinate system
b2a60966	307
d15a28e7	308	AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
92862013	309	TVector3 localposition ;
d15a28e7	310	tmpPHOS->GetLocalPosition(gpos) ;
	311
	312
	313	if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
710f859a	314	{ gpos.SetY( - GetIPtoCrystalSurface() ) ;
d15a28e7	315	}
d15a28e7	316	else
710f859a	317	{ // it is a CPV
710f859a	318	gpos.SetY(- GetIPtoUpperCPVsurface() ) ;
d15a28e7	319	}
d15a28e7	320
92862013	321	Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
	322	Double_t const kRADDEG = 180.0 / kPI ;
	323	Float_t rphi = phi / kRADDEG ;
d15a28e7	324
92862013	325	TRotation rot ;
92862013	326	rot.RotateZ(-rphi) ; // a rotation around Z by angle
d15a28e7	327
92862013	328	TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
92862013	329	gpos.Transform(rot) ; // rotate the baby
d15a28e7	330	}
	331
	332	//____________________________________________________________________________
7b7c1533	333	void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x) const
d15a28e7	334	{
a4e98857	335	// calculates the impact coordinates on PHOS of a neutral particle
a4e98857	336	// emitted in the direction theta and phi in the ALICE global coordinate system
d15a28e7	337
52a36ffd	338	// searches for the PHOS EMC module
	339	ModuleNumber = 0 ;
	340	Double_t tm, tM, pm, pM ;
	341	Int_t index = 1 ;
	342	while ( ModuleNumber == 0 && index <= GetNModules() ) {
	343	EmcModuleCoverage(index, tm, tM, pm, pM) ;
	344	if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) )
	345	ModuleNumber = index ;
	346	index++ ;
d15a28e7	347	}
52a36ffd	348	if ( ModuleNumber != 0 ) {
52a36ffd	349	Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ;
710f859a	350	Float_t y0 = GetIPtoCrystalSurface() ;
52a36ffd	351	Double_t angle = phi - phi0;
	352	x = y0 * TMath::Tan(angle) ;
	353	angle = theta - TMath::Pi() / 2 ;
	354	z = y0 * TMath::Tan(angle) ;
d15a28e7	355	}
d15a28e7	356	}
d15a28e7	357
0bc3b8ed	358	//____________________________________________________________________________
1c9d8212	359	Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const
1c9d8212	360	{
0bc3b8ed	361	// Check if a particle being propagates from IP along the straight line impacts EMC
	362
	363	Bool_t in=kFALSE;
	364	Int_t moduleNumber=0;
1c9d8212	365	Double_t z,x;
0bc3b8ed	366	ImpactOnEmc(particle->Theta(),particle->Phi(),moduleNumber,z,x);
	367	if(moduleNumber) in=kTRUE;
	368	else in=kFALSE;
	369	return in;
1c9d8212	370	}
1c9d8212	371
d15a28e7	372	//____________________________________________________________________________
7b7c1533	373	Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) const
d15a28e7	374	{
b2a60966	375	// Converts the relative numbering into the absolute numbering
ed4205d8	376	// EMCA crystals:
ed4205d8	377	// AbsId = from 1 to fNModules * fNPhi * fNZ
ed4205d8	378	// CPV pad:
	379	// AbsId = from N(total PHOS crystals) + 1
	380	// to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ
d15a28e7	381
d15a28e7	382	Bool_t rv = kTRUE ;
710f859a	383
710f859a	384	if ( relid[1] == 0 ) { // it is a Phos crystal
52a36ffd	385	AbsId =
710f859a	386	( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules
	387	+ ( relid[2] - 1 ) * GetNZ() // the offset along phi
	388	+ relid[3] ; // the offset along z
d15a28e7	389	}
710f859a	390	else { // it is a CPV pad
	391	AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads
	392	+ ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules
	393	+ ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row
52a36ffd	394	+ relid[3] ; // the column number
	395	}
	396
d15a28e7	397	return rv ;
	398	}
	399
	400	//____________________________________________________________________________
5868a791	401	void AliPHOSGeometry::RelPosToAbsId(const Int_t module , const Double_t x, const Double_t z, Int_t & AbsId)const{
5868a791	402	// Converts local PHOS-module (x, z) coordinates to absId
d15a28e7	403
5868a791	404	if(!module){
	405	AbsId = 0 ;
	406	return ;
	407	}
	408
	409	Int_t relid[4] ;
	410	relid[0] = module ;
	411	relid[1] = 0 ;
	412	relid[2] = static_cast<Int_t>(TMath::Ceil(GetNPhi()/2.+ x/GetCellStep()));
	413	relid[3] = static_cast<Int_t>(TMath::Ceil(GetNZ()/2. - z/GetCellStep())) ;
	414
	415	RelToAbsNumbering(relid,AbsId) ;
	416
	417	}
	418	//____________________________________________________________________________
7b7c1533	419	void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos ) const
d15a28e7	420	{
a4e98857	421	// Converts the absolute numbering into the global ALICE coordinate system
b2a60966	422
ed4205d8	423
	424	Int_t relid[4] ;
	425
	426	AbsToRelNumbering(id , relid) ;
	427
	428	Int_t phosmodule = relid[0] ;
	429
	430	Float_t y0 = 0 ;
	431
710f859a	432	if ( relid[1] == 0 ) // it is a PbW04 crystal
	433	y0 = - GetIPtoCrystalSurface() ;
	434	else
	435	y0 = - GetIPtoUpperCPVsurface() ;
	436
ed4205d8	437	Float_t x, z ;
	438	RelPosInModule(relid, x, z) ;
	439
	440	pos.SetX(x) ;
	441	pos.SetZ(z) ;
710f859a	442	pos.SetY(y0) ;
ed4205d8	443
	444	Float_t phi = GetPHOSAngle( phosmodule) ;
	445	Double_t const kRADDEG = 180.0 / kPI ;
	446	Float_t rphi = phi / kRADDEG ;
	447
	448	TRotation rot ;
	449	rot.RotateZ(-rphi) ; // a rotation around Z by angle
	450
	451	TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
	452
	453	pos.Transform(rot) ; // rotate the baby
d15a28e7	454	}
	455
	456	//____________________________________________________________________________
7b7c1533	457	void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const
d15a28e7	458	{
b2a60966	459	// Converts the relative numbering into the local PHOS-module (x, z) coordinates
52a36ffd	460	// Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000)
b2a60966	461
786222b3	462	Int_t row = relid[2] ; //offset along x axis
786222b3	463	Int_t column = relid[3] ; //offset along z axis
d15a28e7	464
ed4205d8	465
66c3e8ff	466	if ( relid[1] == 0 ) { // its a PbW04 crystal
	467	x = - ( GetNPhi()/2. - row + 0.5 ) * GetCellStep() ; // position of Xtal with respect
	468	z = ( GetNZ() /2. - column + 0.5 ) * GetCellStep() ; // of center of PHOS module
52a36ffd	469	}
52a36ffd	470	else {
710f859a	471	x = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
710f859a	472	z = ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
52a36ffd	473	}
2f3366b6	474	}