//_________________________________________________________________________
// Geometry class for PHOS : singleton
-// The EMC modules are parametrized so that any configuration can be easily implemented
-// The title is used to identify the type of CPV used.
+// 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)
+//*-- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (RRC "KI" & SUBATECH)
// --- ROOT system ---
#include "TVector3.h"
#include "TRotation.h"
+#include "TParticle.h"
// --- Standard library ---
-#include <iostream.h>
-
// --- AliRoot header files ---
#include "AliPHOSGeometry.h"
-#include "AliPHOSPpsdRecPoint.h"
-#include "AliConst.h"
+#include "AliPHOSEMCAGeometry.h"
+#include "AliPHOSRecPoint.h"
ClassImp(AliPHOSGeometry) ;
+// these initialisations are needed for a singleton
AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ;
Bool_t AliPHOSGeometry::fgInit = kFALSE ;
+//____________________________________________________________________________
+AliPHOSGeometry::AliPHOSGeometry() {
+ // 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)
{
if (fRotMatrixArray) fRotMatrixArray->Delete() ;
if (fRotMatrixArray) delete fRotMatrixArray ;
- if (fPHOSAngle ) delete fPHOSAngle ;
-// if (fGeometryEMCA ) detete fGeometryEMCA;
-// if (fGeometryCPV ) detete fGeometryCPV ;
+ if (fPHOSAngle ) delete[] fPHOSAngle ;
}
-
//____________________________________________________________________________
void AliPHOSGeometry::Init(void)
{
- // Initializes the PHOS parameters
-
- cout << "PHOS geometry setup: parameters for option " << fName << " " << fTitle << endl ;
- if ( ((strcmp( fName, "default" )) == 0) ||
- ((strcmp( fName, "GPS2" )) == 0) ||
- ((strcmp( fName, "IHEP" )) == 0) ) {
- fgInit = kTRUE ;
- fGeometryEMCA = new AliPHOSEMCAGeometry();
- if ( ((strcmp( fName, "GPS2" )) == 0) ) fGeometryCPV = new AliPHOSPPSDGeometry();
- if ( ((strcmp( fName, "IHEP" )) == 0) ) fGeometryCPV = new AliPHOSCPVGeometry ();
- fNModules = 5;
- fPHOSAngle = new Float_t[fNModules] ;
- 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) ;
+ // Initializes the PHOS parameters :
+ // IHEP is the Protvino CPV (cathode pad chambers)
+
+ TString test(GetName()) ;
+ if (test != "IHEP" ) {
+ Fatal("Init", "%s is not a known geometry (choose among IHEP)", test.Data() ) ;
}
- else {
- fgInit = kFALSE ;
- cout << "PHOS Geometry setup: option not defined " << fName << endl ;
- }
+
+ 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] - (emcParams[1]-emcParams[0])*
+ fGeometryCPV->GetCPVBoxSize(1)/2/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
- return (AliPHOSGeometry *) fgGeom ;
+ // 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 )
}
}
else {
- if ( strcmp(fgGeom->GetName(), name) != 0 ) {
- cout << "AliPHOSGeometry <E> : current geometry is " << fgGeom->GetName() << endl
- << " you cannot call " << name << endl ;
- }
+ if ( strcmp(fgGeom->GetName(), name) != 0 )
+ ::Error("GetInstance", "Current geometry is %s. You cannot call %s", fgGeom->GetName(), name) ;
else
rv = (AliPHOSGeometry *) fgGeom ;
}
//____________________________________________________________________________
void AliPHOSGeometry::SetPHOSAngles()
{
- // Calculates the position in ALICE of the PHOS modules
+ // Calculates the position of the PHOS modules in ALICE global coordinate system
- Double_t const kRADDEG = 180.0 / kPI ;
- Float_t pphi = TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoOuterCoverDistance() ) ) ;
+ Double_t const kRADDEG = 180.0 / TMath::Pi() ;
+ 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 * 2 * ( i - fNModules / 2.0 - 0.5 ) ;
+ 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)
+Bool_t AliPHOSGeometry::AbsToRelNumbering(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
- // = PPSD Module number 1:fNumberOfModulesPhi*fNumberOfModulesZ*2 (2->up and bottom level)
- // relid[2] = Row number inside a PHOS or PPSD module
- // relid[3] = Column number inside a PHOS or PPSD module
+ // = -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 / ( GetNPhi() * GetNZ() ) ) ;
+ Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ;
- if ( phosmodulenumber > GetNModules() ) { // it is a PPSD or CPV pad
-
- if ( strcmp(fName,"GPS2") == 0 ) {
- id -= GetNPhi() * GetNZ() * GetNModules() ;
- Float_t tempo = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
- relid[0] = (Int_t)TMath::Ceil( id / tempo ) ;
- id -= ( relid[0] - 1 ) * tempo ;
- relid[1] = (Int_t)TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ;
- id -= ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
- relid[2] = (Int_t)TMath::Ceil( id / GetNumberOfPadsPhi() ) ;
- relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsPhi() ) ;
- }
- else if ( strcmp(fName,"IHEP") == 0 ) {
- id -= GetNPhi() * GetNZ() * GetNModules() ;
- relid[0] = (Int_t) TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ;
- relid[1] = 1 ;
- id -= ( relid[0] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
- relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfPadsZ() ) ;
- relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsZ() ) ;
- }
+ 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 { // its a PW04 crystal
+ else { // it is a PW04 crystal
relid[0] = phosmodulenumber ;
relid[1] = 0 ;
id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ;
- relid[2] = (Int_t)TMath::Ceil( id / GetNPhi() ) ;
- relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNPhi() ) ;
+ 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)
+void AliPHOSGeometry::EmcModuleCoverage(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 a EMC module
+ // calculates the angular coverage in theta and phi of one EMC (=PHOS) module
Double_t conv ;
if ( opt == Radian() )
else if ( opt == Degre() )
conv = 180. / TMath::Pi() ;
else {
- cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ;
+ Warning("EmcModuleCoverage", "%s unknown option; result in radian", opt) ;
conv = 1. ;
}
- Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ;
- Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
- + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
-
- Double_t angle = TMath::ATan( GetCrystalSize(0)*GetNPhi() / (2 * y0) ) ;
- phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 230 and 310 deg.)
+ Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ;
+ Float_t y0 = GetIPtoCrystalSurface() ;
+ Float_t * strip = fGeometryEMCA->GetStripHalfSize() ;
+ Float_t x0 = fGeometryEMCA->GetNStripX()*strip[0] ;
+ Float_t z0 = fGeometryEMCA->GetNStripZ()*strip[2] ;
+ Double_t angle = TMath::ATan( x0 / y0 ) ;
+ 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( GetCrystalSize(2)*GetNZ() / (2 * y0) ) ;
+ angle = TMath::ATan( z0 / y0 ) ;
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 ;
}
//____________________________________________________________________________
-void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt)
+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 module
+ // calculates the angular coverage in theta and phi of a single crystal in a EMC(=PHOS) module
Double_t conv ;
if ( opt == Radian() )
else if ( opt == Degre() )
conv = 180. / TMath::Pi() ;
else {
- cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ;
+ Warning("EmcXtalCoverage", "%s unknown option; result in radian", opt) ;
conv = 1. ;
}
- Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
- + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
+ 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
+void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & /*gmat*/) const
{
- // Calculates the ALICE global coordinates of a RecPoint and the error matrix
+ // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system
AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
TVector3 localposition ;
if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
- { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() +
- GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ;
+ { gpos.SetY( - GetIPtoCrystalSurface()) ;
}
else
- { // it is a PPSD pad
- AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ;
- if (tmpPpsd->GetUp() ) // it is an upper module
- {
- gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() -
- GetLeadToMicro2Gap() - GetLeadConverterThickness() -
- GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ;
- }
- else // it is a lower module
- gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ;
+ { // it is a CPV
+ gpos.SetY(- GetIPtoUpperCPVsurface() ) ;
}
Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
- Double_t const kRADDEG = 180.0 / kPI ;
+ Double_t const kRADDEG = 180.0 / TMath::Pi() ;
Float_t rphi = phi / kRADDEG ;
TRotation rot ;
//____________________________________________________________________________
void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const
{
- // Calculates the ALICE global coordinates of a RecPoint
+ // Calculates the coordinates of a RecPoint in the ALICE global coordinate system
AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
TVector3 localposition ;
if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
- { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() +
- GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ;
+ { gpos.SetY( - GetIPtoCrystalSurface() ) ;
}
else
- { // it is a PPSD pad
- AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ;
- if (tmpPpsd->GetUp() ) // it is an upper module
- {
- gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() -
- GetLeadToMicro2Gap() - GetLeadConverterThickness() -
- GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ;
- }
- else // it is a lower module
- gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ;
+ { // it is a CPV
+ gpos.SetY(- GetIPtoUpperCPVsurface() ) ;
}
Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
- Double_t const kRADDEG = 180.0 / kPI ;
+ Double_t const kRADDEG = 180.0 / TMath::Pi() ;
Float_t rphi = phi / kRADDEG ;
TRotation rot ;
}
//____________________________________________________________________________
-void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x)
+void AliPHOSGeometry::ImpactOnEmc(Double_t theta, Double_t phi, Int_t & moduleNumber, Double_t & z, Double_t & x) const
{
- // calculates the impact coordinates of a neutral particle
- // emitted in direction theta and phi in ALICE
+ // 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 ;
+
+ moduleNumber = 0 ;
Double_t tm, tM, pm, pM ;
Int_t index = 1 ;
- while ( ModuleNumber == 0 && index <= GetNModules() ) {
+ while ( moduleNumber == 0 && index <= GetNModules() ) {
EmcModuleCoverage(index, tm, tM, pm, pM) ;
if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) )
- ModuleNumber = index ;
+ moduleNumber = index ;
index++ ;
}
- if ( ModuleNumber != 0 ) {
- Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ;
- Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
- + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
+ 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 ;
}
//____________________________________________________________________________
-Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId)
+void AliPHOSGeometry::ImpactOnEmc(TVector3 vec, 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
+
+ TParticle p ;
+ p.SetMomentum(vec.X(), vec.Y(), vec.Z(), 0.) ;
+
+ ImpactOnEmc(p, moduleNumber, z, x) ;
+}
+
+//____________________________________________________________________________
+void AliPHOSGeometry::ImpactOnEmc(TParticle p, 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
+ Double_t theta = p.Theta() ;
+ Double_t phi = p.Phi() ;
+
+ ImpactOnEmc(theta, phi, moduleNumber, z, x) ;
+}
+
+//____________________________________________________________________________
+Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const
+{
+ // Tells if a particle enters PHOS
+ 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
- // AbsId = 1 to fNModules * fNPhi * fNZ -> PbWO4
- // AbsId = N(total PHOS crystals) +
- // 1 to fNModules * 2 * (fNumberOfModulesPhi * fNumberOfModulesZ) * fNumberOfPadsPhi * fNumberOfPadsZ -> PPSD
- // AbsId = N(total PHOS crystals) +
- // 1:fNModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ -> CPV
+ // 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 PPSD pad
- AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from PPSD pads
- + ( relid[0] - 1 ) * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PHOS modules
- * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2
- + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules
- + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row
- + relid[3] ; // the column number
- }
-
- else if ( relid[1] == 0 ) { // it is a Phos crystal
+
+ if ( relid[1] == 0 ) { // it is a Phos crystal
AbsId =
- ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules
- + ( relid[2] - 1 ) * GetNPhi() // the offset of a xtal row
- + relid[3] ; // the column number
+ ( 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 if ( relid[1] == -1 ) { // it is a CPV pad
- AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads
- + ( relid[0] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PHOS modules
- + ( relid[2] - 1 ) * GetNumberOfPadsZ() // the pads offset of a CPV row
+ 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
}
//____________________________________________________________________________
-void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos )
+void AliPHOSGeometry::RelPosInAlice(Int_t id, TVector3 & pos ) const
{
- // Converts the absolute numbering into the global ALICE coordinates
+ // Converts the absolute numbering into the global ALICE coordinate system
- if (id > 0) {
+
+ 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 / TMath::Pi() ;
+ 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::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
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 = -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
- + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ;
- }
- if ( relid[1] > 0 ) { // its a PPSD pad
- if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) // its an bottom module
- {
- y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ;
- }
- else // its an upper module
- y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - GetLeadToMicro2Gap()
- - GetLeadConverterThickness() - GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0) ;
- }
-
- Float_t x, z ;
- RelPosInModule(relid, x, z) ;
-
- pos.SetX(x) ;
- pos.SetZ(z) ;
- pos.SetY( TMath::Sqrt(x*x + z*z + y0*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
+ relid[0] = module ;
+ relid[1] = 0 ;
+ relid[2] = static_cast<Int_t>(TMath::Ceil( x/ GetCellStep() + GetNPhi() / 2.) );
+ relid[3] = static_cast<Int_t>(TMath::Ceil(-z/ GetCellStep() + GetNZ() / 2.) ) ;
- pos.Transform(rot) ; // rotate the baby
- }
- else {
- pos.SetX(0.);
- pos.SetY(0.);
- pos.SetZ(0.);
- }
-}
+ RelToAbsNumbering(relid,AbsId) ;
+}
//____________________________________________________________________________
-void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z)
+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 ppsdmodule ;
- Int_t row = relid[2] ; //offset along x axiz
- Int_t column = relid[3] ; //offset along z axiz
+ Int_t row = relid[2] ; //offset along x axis
+ Int_t column = relid[3] ; //offset along z axis
- Float_t padsizeZ = GetPadSizeZ();
- Float_t padsizeX = GetPadSizePhi();
-
- if ( relid[1] == 0 ) { // its a PbW04 crystal
- x = - ( GetNPhi()/2. - row + 0.5 ) * GetCrystalSize(0) ; // position ox Xtal with respect
- z = ( GetNZ() /2. - column + 0.5 ) * GetCrystalSize(2) ; // of center of PHOS module
+
+ 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 {
- if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() )
- ppsdmodule = relid[1]-GetNumberOfModulesPhi() * GetNumberOfModulesZ();
- else
- ppsdmodule = relid[1] ;
- Int_t modrow = 1+(Int_t)TMath::Ceil( (Float_t)ppsdmodule / GetNumberOfModulesPhi()-1. ) ;
- Int_t modcol = ppsdmodule - ( modrow - 1 ) * GetNumberOfModulesPhi() ;
- Float_t x0 = ( GetNumberOfModulesPhi() / 2. - modrow + 0.5 ) * GetPPSDModuleSize(0) ;
- Float_t z0 = ( GetNumberOfModulesZ() / 2. - modcol + 0.5 ) * GetPPSDModuleSize(2) ;
- x = - ( GetNumberOfPadsPhi()/2. - row - 0.5 ) * padsizeX + x0 ; // position of pad with respect
- z = ( GetNumberOfPadsZ() /2. - column - 0.5 ) * padsizeZ - z0 ; // of center of PHOS module
+ x = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
+ z = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
}
}
+
+//____________________________________________________________________________
+
+TVector3 AliPHOSGeometry::GetModuleCenter(char *det, Int_t module) const
+{
+ // Returns a position of the center of the CPV or EMC module
+ Float_t rDet = 0.;
+ if (strcmp(det,"CPV") == 0) rDet = GetIPtoCPVDistance ();
+ else if (strcmp(det,"EMC") == 0) rDet = GetIPtoCrystalSurface();
+ else Fatal("GetModuleCenter","Wrong detector name %s",det);
+
+ Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees
+ angle *= TMath::Pi()/180;
+ angle += 3*TMath::Pi()/2.;
+ return TVector3(rDet*TMath::Cos(angle), rDet*TMath::Sin(angle), 0.);
+}
+
+//____________________________________________________________________________
+
+TVector3 AliPHOSGeometry::Global2Local(TVector3 globalPosition, Int_t module) const
+{
+ // Transforms a global position of the rec.point to the local coordinate system
+ Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees
+ angle *= TMath::Pi()/180;
+ angle += 3*TMath::Pi()/2.;
+ globalPosition.RotateZ(-angle);
+ return TVector3(globalPosition.Y(),globalPosition.X(),globalPosition.Z());
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff