1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 //_________________________________________________________________________
19 // Geometry class for PHOS : singleton
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.
27 // -- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (RRC "KI" & SUBATECH)
29 // --- ROOT system ---
32 #include "TRotation.h"
33 #include "TParticle.h"
34 #include <TGeoManager.h>
35 #include <TGeoMatrix.h>
37 // --- Standard library ---
39 // --- AliRoot header files ---
41 #include "AliPHOSGeometry.h"
42 #include "AliPHOSEMCAGeometry.h"
43 #include "AliPHOSRecPoint.h"
45 ClassImp(AliPHOSGeometry)
47 // these initialisations are needed for a singleton
48 AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ;
49 Bool_t AliPHOSGeometry::fgInit = kFALSE ;
51 //____________________________________________________________________________
52 AliPHOSGeometry::AliPHOSGeometry() :
56 fIPtoUpperCPVsurface(0),
65 // must be kept public for root persistency purposes, but should never be called by the outside world
69 //____________________________________________________________________________
70 AliPHOSGeometry::AliPHOSGeometry(const AliPHOSGeometry & rhs)
72 fNModules(rhs.fNModules),
75 fIPtoUpperCPVsurface(rhs.fIPtoUpperCPVsurface),
76 fCrystalShift(rhs.fCrystalShift),
77 fCryCellShift(rhs.fCryCellShift),
83 Fatal("cpy ctor", "not implemented") ;
86 //____________________________________________________________________________
87 AliPHOSGeometry::AliPHOSGeometry(const Text_t* name, const Text_t* title)
88 : AliGeometry(name, title),
92 fIPtoUpperCPVsurface(0),
100 // ctor only for internal usage (singleton)
105 //____________________________________________________________________________
106 AliPHOSGeometry::~AliPHOSGeometry(void)
110 if (fRotMatrixArray) fRotMatrixArray->Delete() ;
111 if (fRotMatrixArray) delete fRotMatrixArray ;
112 if (fPHOSAngle ) delete[] fPHOSAngle ;
115 //____________________________________________________________________________
116 void AliPHOSGeometry::Init(void)
118 // Initializes the PHOS parameters :
119 // IHEP is the Protvino CPV (cathode pad chambers)
122 TString test(GetName()) ;
123 if (test != "IHEP" && test != "noCPV") {
124 AliFatal(Form("%s is not a known geometry (choose among IHEP)",
134 fGeometryEMCA = new AliPHOSEMCAGeometry();
136 fGeometryCPV = new AliPHOSCPVGeometry ();
138 fGeometrySUPP = new AliPHOSSupportGeometry();
140 fPHOSAngle = new Float_t[fNModules] ;
142 Float_t * emcParams = fGeometryEMCA->GetEMCParams() ;
144 fPHOSParams[0] = TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2.,
145 (Double_t)(emcParams[0] - (emcParams[1]-emcParams[0])*
146 fGeometryCPV->GetCPVBoxSize(1)/2/emcParams[3]));
147 fPHOSParams[1] = emcParams[1] ;
148 fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.);
149 fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ;
151 fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ;
153 //calculate offset to crystal surface
154 Float_t * inthermo = fGeometryEMCA->GetInnerThermoHalfSize() ;
155 Float_t * strip = fGeometryEMCA->GetStripHalfSize() ;
156 Float_t* splate = fGeometryEMCA->GetSupportPlateHalfSize();
157 Float_t * crystal = fGeometryEMCA->GetCrystalHalfSize() ;
158 Float_t * pin = fGeometryEMCA->GetAPDHalfSize() ;
159 Float_t * preamp = fGeometryEMCA->GetPreampHalfSize() ;
160 fCrystalShift=-inthermo[1]+strip[1]+splate[1]+crystal[1]-fGeometryEMCA->GetAirGapLed()/2.+pin[1]+preamp[1] ;
161 fCryCellShift=crystal[1]-(fGeometryEMCA->GetAirGapLed()-2*pin[1]-2*preamp[1])/2;
164 for ( index = 0; index < fNModules; index++ )
165 fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry()
167 fRotMatrixArray = new TObjArray(fNModules) ;
169 // Geometry parameters are calculated
172 Double_t const kRADDEG = 180.0 / TMath::Pi() ;
173 Float_t r = GetIPtoOuterCoverDistance() + fPHOSParams[3] - GetCPVBoxSize(1) ;
174 for (Int_t iModule=0; iModule<fNModules; iModule++) {
175 fModuleCenter[iModule][0] = r * TMath::Sin(fPHOSAngle[iModule] / kRADDEG );
176 fModuleCenter[iModule][1] =-r * TMath::Cos(fPHOSAngle[iModule] / kRADDEG );
177 fModuleCenter[iModule][2] = 0.;
179 fModuleAngle[iModule][0][0] = 90;
180 fModuleAngle[iModule][0][1] = fPHOSAngle[iModule];
181 fModuleAngle[iModule][1][0] = 0;
182 fModuleAngle[iModule][1][1] = 0;
183 fModuleAngle[iModule][2][0] = 90;
184 fModuleAngle[iModule][2][1] = 270 + fPHOSAngle[iModule];
189 //____________________________________________________________________________
190 AliPHOSGeometry * AliPHOSGeometry::GetInstance()
192 // Returns the pointer of the unique instance; singleton specific
194 return static_cast<AliPHOSGeometry *>( fgGeom ) ;
197 //____________________________________________________________________________
198 AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title)
200 // Returns the pointer of the unique instance
201 // Creates it with the specified options (name, title) if it does not exist yet
203 AliPHOSGeometry * rv = 0 ;
205 if ( strcmp(name,"") == 0 )
208 fgGeom = new AliPHOSGeometry(name, title) ;
210 rv = (AliPHOSGeometry * ) fgGeom ;
219 if ( strcmp(fgGeom->GetName(), name) != 0 )
220 ::Error("GetInstance", "Current geometry is %s. You cannot call %s",
221 fgGeom->GetName(), name) ;
223 rv = (AliPHOSGeometry *) fgGeom ;
228 //____________________________________________________________________________
229 void AliPHOSGeometry::SetPHOSAngles()
231 // Calculates the position of the PHOS modules in ALICE global coordinate system
234 Double_t const kRADDEG = 180.0 / TMath::Pi() ;
235 Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ;
238 AliError(Form("PHOS modules overlap!\n pphi = %f fAngle = %f",
244 for( Int_t i = 1; i <= fNModules ; i++ ) {
245 Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ;
246 fPHOSAngle[i-1] = - angle ;
250 //____________________________________________________________________________
251 Bool_t AliPHOSGeometry::AbsToRelNumbering(Int_t absId, Int_t * relid) const
253 // Converts the absolute numbering into the following array
254 // relid[0] = PHOS Module number 1:fNModules
255 // relid[1] = 0 if PbW04
257 // relid[2] = Row number inside a PHOS module
258 // relid[3] = Column number inside a PHOS module
263 Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ;
265 if ( phosmodulenumber > GetNModules() ) { // it is a CPV pad
267 id -= GetNPhi() * GetNZ() * GetNModules() ;
268 Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ;
269 relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ;
271 id -= ( relid[0] - 1 ) * nCPV ;
272 relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ;
273 relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ;
275 else { // it is a PW04 crystal
277 relid[0] = phosmodulenumber ;
279 id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ;
280 relid[2] = (Int_t)TMath::Ceil( id / GetNZ() ) ;
281 relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNZ() ) ;
285 //____________________________________________________________________________
286 void AliPHOSGeometry::GetGlobal(const AliRecPoint* , TVector3 & ) const
288 AliFatal(Form("Please use GetGlobalPHOS(recPoint,gpos) instead of GetGlobal!"));
291 //____________________________________________________________________________
292 void AliPHOSGeometry::GetGlobalPHOS(const AliPHOSRecPoint* recPoint, TVector3 & gpos) const
294 // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system
296 const AliPHOSRecPoint * tmpPHOS = recPoint ;
297 TVector3 localposition ;
299 tmpPHOS->GetLocalPosition(gpos) ;
302 AliFatal("Geo manager not initialized\n");
304 //construct module name
307 if(tmpPHOS->IsEmc()){
308 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",tmpPHOS->GetPHOSMod()) ;
309 // sprintf(path,"/ALIC_1/PHOS_%d",tmpPHOS->GetPHOSMod()) ;
313 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",tmpPHOS->GetPHOSMod()) ;
314 dy= GetCPVBoxSize(1)/2. ; //center of CPV module
316 Double_t pos[3]={gpos.X(),gpos.Y()-dy,gpos.Z()} ;
318 pos[2]=-pos[2] ; //Opposite z directions in EMC matrix and local frame!!!
320 //now apply possible shifts and rotations
321 if (!gGeoManager->cd(path)){
322 AliFatal("Geo manager can not find path \n");
324 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
326 m->LocalToMaster(pos,posC);
329 AliFatal("Geo matrixes are not loaded \n") ;
331 gpos.SetXYZ(posC[0],posC[1],posC[2]) ;
334 //____________________________________________________________________________
335 void AliPHOSGeometry::ImpactOnEmc(Double_t * vtx, Double_t theta, Double_t phi,
336 Int_t & moduleNumber, Double_t & z, Double_t & x) const
338 // calculates the impact coordinates on PHOS of a neutral particle
339 // emitted in the vertex vtx[3] with direction theta and phi in the ALICE global coordinate system
340 TVector3 p(TMath::Sin(theta)*TMath::Cos(phi),TMath::Sin(theta)*TMath::Sin(phi),TMath::Cos(theta)) ;
341 TVector3 v(vtx[0],vtx[1],vtx[2]) ;
344 AliFatal("Geo manager not initialized\n");
347 for(Int_t imod=1; imod<=GetNModules() ; imod++){
348 //create vector from (0,0,0) to center of crystal surface of imod module
349 Double_t tmp[3]={0.,-fCrystalShift,0.} ;
352 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",imod) ;
353 if (!gGeoManager->cd(path)){
354 AliFatal("Geo manager can not find path \n");
356 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
357 Double_t posG[3]={0.,0.,0.} ;
358 if (m) m->LocalToMaster(tmp,posG);
359 TVector3 n(posG[0],posG[1],posG[2]) ;
360 Double_t direction=n.Dot(p) ;
362 continue ; //momentum directed FROM module
363 Double_t fr = (n.Mag2()-n.Dot(v))/direction ;
364 //Calculate direction in module plain
367 Float_t * sz = fGeometryEMCA->GetInnerThermoHalfSize() ; //Wery close to the zise of the Xtl set
368 if(TMath::Abs(TMath::Abs(n.Z())<sz[2]) && n.Pt()<sz[0]){
369 moduleNumber = imod ;
371 x=TMath::Sign(n.Pt(),n.X()) ;
372 //no need to return to local system since we calcilated distance from module center
373 //and tilts can not be significant.
383 //____________________________________________________________________________
384 Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const
386 // Tells if a particle enters PHOS
388 Int_t moduleNumber=0;
389 Double_t vtx[3]={particle->Vx(),particle->Vy(),particle->Vz()} ;
391 ImpactOnEmc(vtx,particle->Theta(),particle->Phi(),moduleNumber,z,x);
397 //____________________________________________________________________________
398 Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & absId) const
400 // Converts the relative numbering into the absolute numbering
402 // absId = from 1 to fNModules * fNPhi * fNZ
404 // absId = from N(total PHOS crystals) + 1
405 // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ
409 if ( relid[1] == 0 ) { // it is a Phos crystal
411 ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules
412 + ( relid[2] - 1 ) * GetNZ() // the offset along phi
413 + relid[3] ; // the offset along z
415 else { // it is a CPV pad
416 absId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads
417 + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules
418 + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row
419 + relid[3] ; // the column number
425 //____________________________________________________________________________
426 void AliPHOSGeometry::RelPosInAlice(Int_t id, TVector3 & pos ) const
428 // Converts the absolute numbering into the global ALICE coordinate system
431 AliFatal("Geo manager not initialized\n");
436 AbsToRelNumbering(id , relid) ;
438 //construct module name
440 if(relid[1]==0){ //this is EMC
442 Double_t ps[3]= {0.0,-fCryCellShift,0.}; //Position incide the crystal
443 Double_t psC[3]={0.0,0.0,0.}; //Global position
445 //Shift and possibly apply misalignment corrections
446 Int_t nCellsXInStrip=fGeometryEMCA->GetNCellsXInStrip() ;
447 Int_t nCellsZInStrip=fGeometryEMCA->GetNCellsZInStrip() ;
448 Int_t strip=1+((Int_t) TMath::Ceil((Double_t)relid[2]/nCellsXInStrip))*fGeometryEMCA->GetNStripZ()-
449 (Int_t) TMath::Ceil((Double_t)relid[3]/nCellsZInStrip) ;
450 Int_t cellraw= relid[3]%nCellsZInStrip ;
451 if(cellraw==0)cellraw=nCellsZInStrip ;
452 Int_t cell= ((relid[2]-1)%nCellsXInStrip)*nCellsZInStrip + cellraw ;
453 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1/PSTR_%d/PCEL_%d",
454 relid[0],strip,cell) ;
455 if (!gGeoManager->cd(path)){
456 AliFatal("Geo manager can not find path \n");
458 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
459 if (m) m->LocalToMaster(ps,psC);
461 AliFatal("Geo matrixes are not loaded \n") ;
463 pos.SetXYZ(psC[0],psC[1],psC[2]) ;
466 //first calculate position with respect to CPV plain
467 Int_t row = relid[2] ; //offset along x axis
468 Int_t column = relid[3] ; //offset along z axis
469 Double_t ps[3]= {0.0,GetCPVBoxSize(1)/2.,0.}; //Position on top of CPV
470 Double_t psC[3]={0.0,0.0,0.}; //Global position
471 pos[0] = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
472 pos[2] = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
474 //now apply possible shifts and rotations
475 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",relid[0]) ;
476 if (!gGeoManager->cd(path)){
477 AliFatal("Geo manager can not find path \n");
479 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
480 if (m) m->LocalToMaster(ps,psC);
482 AliFatal("Geo matrixes are not loaded \n") ;
484 pos.SetXYZ(psC[0],psC[1],-psC[2]) ;
488 //____________________________________________________________________________
489 void AliPHOSGeometry::RelPosToAbsId(Int_t module, Double_t x, Double_t z, Int_t & absId) const
491 // converts local PHOS-module (x, z) coordinates to absId
493 //find Global position
495 AliFatal("Geo manager not initialized\n");
497 Double_t posL[3]={x,-fCrystalShift,-z} ; //Only for EMC!!!
500 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",module) ;
501 if (!gGeoManager->cd(path)){
502 AliFatal("Geo manager can not find path \n");
504 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
506 mPHOS->LocalToMaster(posL,posG);
509 AliFatal("Geo matrixes are not loaded \n") ;
513 gGeoManager->FindNode(posG[0],posG[1],posG[2]) ;
514 //Check that path contains PSTR and extract strip number
515 TString cpath(gGeoManager->GetPath()) ;
516 Int_t indx = cpath.Index("PCEL") ;
517 if(indx==-1){ //for the few events when particle hits between srips use ideal geometry
520 relid[2] = static_cast<Int_t>(TMath::Ceil( x/ GetCellStep() + GetNPhi() / 2.) );
521 relid[3] = static_cast<Int_t>(TMath::Ceil(-z/ GetCellStep() + GetNZ() / 2.) ) ;
522 if(relid[2]<1)relid[2]=1 ;
523 if(relid[3]<1)relid[3]=1 ;
524 if(relid[2]>GetNPhi())relid[2]=GetNPhi() ;
525 if(relid[3]>GetNZ())relid[3]=GetNZ() ;
526 RelToAbsNumbering(relid,absId) ;
529 Int_t indx2 = cpath.Index("/",indx) ;
531 indx2=cpath.Length() ;
532 TString cell=cpath(indx+5,indx2-indx-5) ;
533 Int_t icell=cell.Atoi() ;
534 indx = cpath.Index("PSTR") ;
535 indx2 = cpath.Index("/",indx) ;
536 TString strip=cpath(indx+5,indx2-indx-5) ;
537 Int_t iStrip = strip.Atoi() ;
539 Int_t row = fGeometryEMCA->GetNStripZ() - (iStrip - 1) % (fGeometryEMCA->GetNStripZ()) ;
540 Int_t col = (Int_t) TMath::Ceil((Double_t) iStrip/(fGeometryEMCA->GetNStripZ())) -1 ;
542 // Absid for 8x2-strips. Looks nice :)
543 absId = (module-1)*GetNCristalsInModule() +
544 row * 2 + (col*fGeometryEMCA->GetNCellsXInStrip() + (icell - 1) / 2)*GetNZ() - (icell & 1 ? 1 : 0);
550 //____________________________________________________________________________
551 void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const
553 // Converts the relative numbering into the local PHOS-module (x, z) coordinates
554 // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000)
558 AliFatal("Geo manager not initialized\n");
560 //construct module name
562 if(relid[1]==0){ //this is PHOS
564 // Calculations using ideal geometry (obsolete)
565 // x = - ( GetNPhi()/2. - relid[2] + 0.5 ) * GetCellStep() ; // position of Xtal with respect
566 // z = - ( GetNZ() /2. - relid[3] + 0.5 ) * GetCellStep() ; // of center of PHOS module
568 Double_t pos[3]= {0.0,-fCryCellShift,0.}; //Position incide the crystal
569 Double_t posC[3]={0.0,0.0,0.}; //Global position
571 //Shift and possibly apply misalignment corrections
572 Int_t nCellsXInStrip=fGeometryEMCA->GetNCellsXInStrip() ;
573 Int_t nCellsZInStrip=fGeometryEMCA->GetNCellsZInStrip() ;
574 // Int_t strip=1+(relid[3]-1)/fGeometryEMCA->GetNCellsZInStrip()+((relid[2]-1)/nCellsInStrip)*fGeometryEMCA->GetNStripZ() ;
575 Int_t strip=1+((Int_t) TMath::Ceil((Double_t)relid[2]/nCellsXInStrip))*fGeometryEMCA->GetNStripZ()-
576 (Int_t) TMath::Ceil((Double_t)relid[3]/nCellsZInStrip) ;
577 Int_t cellraw= relid[3]%nCellsZInStrip ;
578 if(cellraw==0)cellraw=nCellsZInStrip ;
579 Int_t cell= ((relid[2]-1)%nCellsXInStrip)*nCellsZInStrip + cellraw ;
580 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1/PSTR_%d/PCEL_%d",
581 relid[0],strip,cell) ;
582 if (!gGeoManager->cd(path)){
583 AliFatal("Geo manager can not find path \n");
585 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
586 if (m) m->LocalToMaster(pos,posC);
588 AliFatal("Geo matrixes are not loaded \n") ;
590 // printf("Local: x=%f, y=%f, z=%f \n",pos[0],pos[1],pos[2]) ;
591 // printf(" gl: x=%f, y=%f, z=%f \n",posC[0],posC[1],posC[2]) ;
592 //Return to PHOS local system
593 Double_t posL[3]={posC[0],posC[1],posC[2]};
594 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",relid[0]) ;
595 // sprintf(path,"/ALIC_1/PHOS_%d",relid[0]) ;
596 if (!gGeoManager->cd(path)){
597 AliFatal("Geo manager can not find path \n");
599 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
600 if (mPHOS) mPHOS->MasterToLocal(posC,posL);
602 AliFatal("Geo matrixes are not loaded \n") ;
604 //printf("RelPosInMod: posL=[%f,%f,%f]\n",posL[0],posL[1],posL[2]) ;
605 //printf("old: x=%f, z=%f \n",x,z);
611 //first calculate position with respect to CPV plain
612 Int_t row = relid[2] ; //offset along x axis
613 Int_t column = relid[3] ; //offset along z axis
614 Double_t pos[3]= {0.0,0.0,0.}; //Position incide the CPV printed circuit
615 Double_t posC[3]={0.0,0.0,0.}; //Global position
616 // x = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
617 // z = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
618 pos[0] = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
619 pos[2] = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
621 //now apply possible shifts and rotations
622 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",relid[0]) ;
623 if (!gGeoManager->cd(path)){
624 AliFatal("Geo manager can not find path \n");
626 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
627 if (m) m->LocalToMaster(pos,posC);
629 AliFatal("Geo matrixes are not loaded \n") ;
631 //Return to PHOS local system
632 Double_t posL[3]={0.,0.,0.,} ;
633 sprintf(path,"/ALIC_1/PHOS_%d",relid[0]) ;
634 if (!gGeoManager->cd(path)){
635 AliFatal("Geo manager can not find path \n");
637 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
638 if (mPHOS) mPHOS->MasterToLocal(posC,posL);
640 AliFatal("Geo matrixes are not loaded \n") ;
650 //____________________________________________________________________________
652 void AliPHOSGeometry::GetModuleCenter(TVector3& center,
656 // Returns a position of the center of the CPV or EMC module
657 // in ideal (not misaligned) geometry
659 if (strcmp(det,"CPV") == 0) rDet = GetIPtoCPVDistance ();
660 else if (strcmp(det,"EMC") == 0) rDet = GetIPtoCrystalSurface();
662 AliFatal(Form("Wrong detector name %s",det));
664 Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees
665 angle *= TMath::Pi()/180;
666 angle += 3*TMath::Pi()/2.;
667 center.SetXYZ(rDet*TMath::Cos(angle), rDet*TMath::Sin(angle), 0.);
670 //____________________________________________________________________________
672 void AliPHOSGeometry::Global2Local(TVector3& localPosition,
673 const TVector3& globalPosition,
676 // Transforms a global position of the rec.point to the local coordinate system
677 //Return to PHOS local system
678 Double_t posG[3]={globalPosition.X(),globalPosition.Y(),globalPosition.Z()} ;
679 Double_t posL[3]={0.,0.,0.} ;
681 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",module) ;
682 // sprintf(path,"/ALIC_1/PHOS_%d",module) ;
683 if (!gGeoManager->cd(path)){
684 AliFatal("Geo manager can not find path \n");
686 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
687 if (mPHOS) mPHOS->MasterToLocal(posG,posL);
689 AliFatal("Geo matrixes are not loaded \n") ;
691 localPosition.SetXYZ(posL[0],posL[1]+fCrystalShift,-posL[2]) ;
694 Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees
695 angle *= TMath::Pi()/180;
696 angle += 3*TMath::Pi()/2.;
697 localPosition = globalPosition;
698 localPosition.RotateZ(-angle);
701 //____________________________________________________________________________
702 void AliPHOSGeometry::Local2Global(Int_t mod, Float_t x, Float_t z,
703 TVector3& globalPosition) const
706 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",mod) ;
707 // sprintf(path,"/ALIC_1/PHOS_%d",mod) ;
708 if (!gGeoManager->cd(path)){
709 AliFatal("Geo manager can not find path \n");
711 Double_t posL[3]={x,-fCrystalShift,-z} ; //Only for EMC!!!
713 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
715 mPHOS->LocalToMaster(posL,posG);
718 AliFatal("Geo matrixes are not loaded \n") ;
720 globalPosition.SetXYZ(posG[0],posG[1],posG[2]) ;
722 //____________________________________________________________________________
723 void AliPHOSGeometry::GetIncidentVector(const TVector3 &vtx, Int_t module, Float_t x,Float_t z, TVector3 &vInc) const {
724 //Calculates vector pointing from vertex to current poisition in module local frame
725 //Note that PHOS local system and ALICE global have opposite z directions
727 Global2Local(vInc,vtx,module) ;
728 vInc.SetXYZ(vInc.X()+x,vInc.Y(),vInc.Z()+z) ;