Bug fix
[u/mrichter/AliRoot.git] / PHOS / AliPHOSGeometry.cxx
CommitLineData
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/* $Id$ */
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//
05d33a3d 27// -- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (RRC "KI" & SUBATECH)
d15a28e7 28
29// --- ROOT system ---
30
31#include "TVector3.h"
32#include "TRotation.h"
e957fea8 33#include "TParticle.h"
91daaf24 34#include <TGeoManager.h>
d15a28e7 35
36// --- Standard library ---
37
d15a28e7 38// --- AliRoot header files ---
351dd634 39#include "AliLog.h"
d15a28e7 40#include "AliPHOSGeometry.h"
468794ea 41#include "AliPHOSEMCAGeometry.h"
710f859a 42#include "AliPHOSRecPoint.h"
d15a28e7 43
925e6570 44ClassImp(AliPHOSGeometry)
d15a28e7 45
a4e98857 46// these initialisations are needed for a singleton
05d33a3d 47AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ;
48Bool_t AliPHOSGeometry::fgInit = kFALSE ;
9ec91567 49
d15a28e7 50//____________________________________________________________________________
3663622c 51AliPHOSGeometry::AliPHOSGeometry() :
52 fNModules(0),
53 fAngle(0.f),
54 fPHOSAngle(0),
55 fIPtoUpperCPVsurface(0),
56 fRotMatrixArray(0),
57 fGeometryEMCA(0),
58 fGeometryCPV(0),
59 fGeometrySUPP(0)
60{
e957fea8 61 // default ctor
62 // must be kept public for root persistency purposes, but should never be called by the outside world
e957fea8 63 fgGeom = 0 ;
e957fea8 64}
65
66//____________________________________________________________________________
3663622c 67AliPHOSGeometry::AliPHOSGeometry(const AliPHOSGeometry & rhs)
68 : AliGeometry(rhs),
69 fNModules(rhs.fNModules),
70 fAngle(rhs.fAngle),
71 fPHOSAngle(0),
72 fIPtoUpperCPVsurface(rhs.fIPtoUpperCPVsurface),
73 fRotMatrixArray(0),
74 fGeometryEMCA(0),
75 fGeometryCPV(0),
76 fGeometrySUPP(0)
77{
78 Fatal("cpy ctor", "not implemented") ;
79}
80
91daaf24 81//____________________________________________________________________________
3663622c 82AliPHOSGeometry::AliPHOSGeometry(const Text_t* name, const Text_t* title)
83 : AliGeometry(name, title),
84 fNModules(0),
85 fAngle(0.f),
86 fPHOSAngle(0),
87 fIPtoUpperCPVsurface(0),
88 fRotMatrixArray(0),
89 fGeometryEMCA(0),
90 fGeometryCPV(0),
91 fGeometrySUPP(0)
92{
93 // ctor only for internal usage (singleton)
94 Init() ;
95}
96
3663622c 97//____________________________________________________________________________
d15a28e7 98AliPHOSGeometry::~AliPHOSGeometry(void)
99{
b2a60966 100 // dtor
101
52a36ffd 102 if (fRotMatrixArray) fRotMatrixArray->Delete() ;
103 if (fRotMatrixArray) delete fRotMatrixArray ;
fa0bc588 104 if (fPHOSAngle ) delete[] fPHOSAngle ;
52a36ffd 105}
52a36ffd 106
91daaf24 107//____________________________________________________________________________
52a36ffd 108void AliPHOSGeometry::Init(void)
109{
a4e98857 110 // Initializes the PHOS parameters :
111 // IHEP is the Protvino CPV (cathode pad chambers)
710f859a 112
809cd394 113 TString test(GetName()) ;
9d1b528b 114 if (test != "IHEP" && test != "noCPV") {
351dd634 115 AliFatal(Form("%s is not a known geometry (choose among IHEP)",
116 test.Data() )) ;
809cd394 117 }
118
710f859a 119 fgInit = kTRUE ;
05d33a3d 120
85698486 121 fNModules = 5;
122 fAngle = 20;
05d33a3d 123
710f859a 124 fGeometryEMCA = new AliPHOSEMCAGeometry();
125
126 fGeometryCPV = new AliPHOSCPVGeometry ();
127
128 fGeometrySUPP = new AliPHOSSupportGeometry();
129
130 fPHOSAngle = new Float_t[fNModules] ;
131
132 Float_t * emcParams = fGeometryEMCA->GetEMCParams() ;
133
581e32d4 134 fPHOSParams[0] = TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2.,
a83b6179 135 (Double_t)(emcParams[0] - (emcParams[1]-emcParams[0])*
136 fGeometryCPV->GetCPVBoxSize(1)/2/emcParams[3]));
710f859a 137 fPHOSParams[1] = emcParams[1] ;
581e32d4 138 fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.);
710f859a 139 fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ;
140
141 fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ;
8e20650f 142
143 //calculate offset to crystal surface
144 Float_t * inthermo = fGeometryEMCA->GetInnerThermoHalfSize() ;
145 Float_t * strip = fGeometryEMCA->GetStripHalfSize() ;
146 Float_t* splate = fGeometryEMCA->GetSupportPlateHalfSize();
147 Float_t * crystal = fGeometryEMCA->GetCrystalHalfSize() ;
148 Float_t * pin = fGeometryEMCA->GetAPDHalfSize() ;
149 Float_t * preamp = fGeometryEMCA->GetPreampHalfSize() ;
150 fCrystalShift=-inthermo[1]+strip[1]+splate[1]+crystal[1]-fGeometryEMCA->GetAirGapLed()/2.+pin[1]+preamp[1] ;
151 fCryCellShift=crystal[1]-(fGeometryEMCA->GetAirGapLed()-2*pin[1]-2*preamp[1])/2;
152
710f859a 153 Int_t index ;
154 for ( index = 0; index < fNModules; index++ )
52a36ffd 155 fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry()
710f859a 156
710f859a 157 fRotMatrixArray = new TObjArray(fNModules) ;
05d33a3d 158
85698486 159 // Geometry parameters are calculated
160
161 SetPHOSAngles();
162 Double_t const kRADDEG = 180.0 / TMath::Pi() ;
163 Float_t r = GetIPtoOuterCoverDistance() + fPHOSParams[3] - GetCPVBoxSize(1) ;
164 for (Int_t iModule=0; iModule<fNModules; iModule++) {
165 fModuleCenter[iModule][0] = r * TMath::Sin(fPHOSAngle[iModule] / kRADDEG );
166 fModuleCenter[iModule][1] =-r * TMath::Cos(fPHOSAngle[iModule] / kRADDEG );
167 fModuleCenter[iModule][2] = 0.;
168
169 fModuleAngle[iModule][0][0] = 90;
170 fModuleAngle[iModule][0][1] = fPHOSAngle[iModule];
171 fModuleAngle[iModule][1][0] = 0;
172 fModuleAngle[iModule][1][1] = 0;
173 fModuleAngle[iModule][2][0] = 90;
174 fModuleAngle[iModule][2][1] = 270 + fPHOSAngle[iModule];
05d33a3d 175 }
176
52a36ffd 177}
178
5ccb0008 179//____________________________________________________________________________
52a36ffd 180AliPHOSGeometry * AliPHOSGeometry::GetInstance()
181{
a4e98857 182 // Returns the pointer of the unique instance; singleton specific
183
809cd394 184 return static_cast<AliPHOSGeometry *>( fgGeom ) ;
52a36ffd 185}
186
187//____________________________________________________________________________
188AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title)
189{
190 // Returns the pointer of the unique instance
a4e98857 191 // Creates it with the specified options (name, title) if it does not exist yet
192
52a36ffd 193 AliPHOSGeometry * rv = 0 ;
194 if ( fgGeom == 0 ) {
195 if ( strcmp(name,"") == 0 )
196 rv = 0 ;
197 else {
198 fgGeom = new AliPHOSGeometry(name, title) ;
199 if ( fgInit )
200 rv = (AliPHOSGeometry * ) fgGeom ;
201 else {
202 rv = 0 ;
203 delete fgGeom ;
204 fgGeom = 0 ;
205 }
206 }
207 }
208 else {
21cd0c07 209 if ( strcmp(fgGeom->GetName(), name) != 0 )
351dd634 210 ::Error("GetInstance", "Current geometry is %s. You cannot call %s",
211 fgGeom->GetName(), name) ;
52a36ffd 212 else
213 rv = (AliPHOSGeometry *) fgGeom ;
214 }
215 return rv ;
216}
4697edca 217
52a36ffd 218//____________________________________________________________________________
219void AliPHOSGeometry::SetPHOSAngles()
220{
a4e98857 221 // Calculates the position of the PHOS modules in ALICE global coordinate system
91daaf24 222 // in ideal geometry
52a36ffd 223
a8c47ab6 224 Double_t const kRADDEG = 180.0 / TMath::Pi() ;
710f859a 225 Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ;
52a36ffd 226 pphi *= kRADDEG ;
710f859a 227 if (pphi > fAngle){
351dd634 228 AliError(Form("PHOS modules overlap!\n pphi = %f fAngle = %f",
229 pphi, fAngle));
710f859a 230
231 }
ed4205d8 232 pphi = fAngle;
52a36ffd 233
234 for( Int_t i = 1; i <= fNModules ; i++ ) {
ed4205d8 235 Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ;
52a36ffd 236 fPHOSAngle[i-1] = - angle ;
237 }
d15a28e7 238}
239
240//____________________________________________________________________________
fd6f5ab1 241Bool_t AliPHOSGeometry::AbsToRelNumbering(Int_t absId, Int_t * relid) const
d15a28e7 242{
91daaf24 243 // Converts the absolute numbering into the following array
b2a60966 244 // relid[0] = PHOS Module number 1:fNModules
245 // relid[1] = 0 if PbW04
710f859a 246 // = -1 if CPV
247 // relid[2] = Row number inside a PHOS module
248 // relid[3] = Column number inside a PHOS module
d15a28e7 249
250 Bool_t rv = kTRUE ;
fd6f5ab1 251 Float_t id = absId ;
d15a28e7 252
710f859a 253 Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ;
d15a28e7 254
710f859a 255 if ( phosmodulenumber > GetNModules() ) { // it is a CPV pad
256
257 id -= GetNPhi() * GetNZ() * GetNModules() ;
258 Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ;
259 relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ;
260 relid[1] = -1 ;
261 id -= ( relid[0] - 1 ) * nCPV ;
262 relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ;
263 relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ;
d15a28e7 264 }
710f859a 265 else { // it is a PW04 crystal
d15a28e7 266
92862013 267 relid[0] = phosmodulenumber ;
268 relid[1] = 0 ;
269 id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ;
710f859a 270 relid[2] = (Int_t)TMath::Ceil( id / GetNZ() ) ;
271 relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNZ() ) ;
d15a28e7 272 }
273 return rv ;
274}
9f616d61 275//____________________________________________________________________________
91daaf24 276void AliPHOSGeometry::GetGlobal(const AliRecPoint* recPoint, TVector3 & gpos) const
d15a28e7 277{
9ee9f78d 278 AliFatal(Form("Please use GetGlobalPHOS(recPoint,gpos) instead of GetGlobal!"));
279}
280
281//____________________________________________________________________________
282void AliPHOSGeometry::GetGlobalPHOS(const AliPHOSRecPoint* recPoint, TVector3 & gpos) const
283{
a4e98857 284 // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system
b2a60966 285
9ee9f78d 286 const AliPHOSRecPoint * tmpPHOS = recPoint ;
92862013 287 TVector3 localposition ;
d15a28e7 288
289 tmpPHOS->GetLocalPosition(gpos) ;
290
91daaf24 291 if (!gGeoManager){
292 AliFatal("Geo manager not initialized\n");
d15a28e7 293 }
91daaf24 294 //construct module name
295 char path[100] ;
296 Double_t dy ;
297 if(tmpPHOS->IsEmc()){
298 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",tmpPHOS->GetPHOSMod()) ;
8e20650f 299// sprintf(path,"/ALIC_1/PHOS_%d",tmpPHOS->GetPHOSMod()) ;
300 dy=fCrystalShift ;
d15a28e7 301 }
91daaf24 302 else{
303 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",tmpPHOS->GetPHOSMod()) ;
304 dy= GetCPVBoxSize(1)/2. ; //center of CPV module
305 }
306 Double_t pos[3]={gpos.X(),gpos.Y()-dy,gpos.Z()} ;
8e20650f 307 if(tmpPHOS->IsEmc())
308 pos[2]=-pos[2] ; //Opposite z directions in EMC matrix and local frame!!!
91daaf24 309 Double_t posC[3];
310 //now apply possible shifts and rotations
311 if (!gGeoManager->cd(path)){
312 AliFatal("Geo manager can not find path \n");
313 }
314 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
8e20650f 315 if (m){
316 m->LocalToMaster(pos,posC);
317 }
91daaf24 318 else{
319 AliFatal("Geo matrixes are not loaded \n") ;
320 }
8e20650f 321 gpos.SetXYZ(posC[0],posC[1],posC[2]) ;
7b51037f 322
aa35fc01 323}
aa35fc01 324//____________________________________________________________________________
91daaf24 325void AliPHOSGeometry::ImpactOnEmc(Double_t * vtx, Double_t theta, Double_t phi,
326 Int_t & moduleNumber, Double_t & z, Double_t & x) const
aa35fc01 327{
328 // calculates the impact coordinates on PHOS of a neutral particle
91daaf24 329 // emitted in the vertex vtx[3] with direction theta and phi in the ALICE global coordinate system
330 TVector3 p(TMath::Sin(theta)*TMath::Cos(phi),TMath::Sin(theta)*TMath::Sin(phi),TMath::Cos(theta)) ;
022ee411 331 TVector3 v(vtx[0],vtx[1],vtx[2]) ;
aa35fc01 332
91daaf24 333 if (!gGeoManager){
334 AliFatal("Geo manager not initialized\n");
335 }
336
337 for(Int_t imod=1; imod<=GetNModules() ; imod++){
338 //create vector from (0,0,0) to center of crystal surface of imod module
8e20650f 339 Double_t tmp[3]={0.,-fCrystalShift,0.} ;
91daaf24 340
341 char path[100] ;
342 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",imod) ;
343 if (!gGeoManager->cd(path)){
344 AliFatal("Geo manager can not find path \n");
345 }
346 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
347 Double_t posG[3]={0.,0.,0.} ;
348 if (m) m->LocalToMaster(tmp,posG);
349 TVector3 n(posG[0],posG[1],-posG[2]) ;
350 Double_t direction=n.Dot(p) ;
351 if(direction<=0.)
352 continue ; //momentum directed FROM module
19c8ddd0 353 Double_t fr = (n.Mag2()-n.Dot(v))/direction ;
91daaf24 354 //Calculate direction in module plain
19c8ddd0 355 n-=v+fr*p ;
91daaf24 356 n*=-1. ;
357 Float_t * sz = fGeometryEMCA->GetInnerThermoHalfSize() ; //Wery close to the zise of the Xtl set
358 if(TMath::Abs(TMath::Abs(n.Z())<sz[2]) && n.Pt()<sz[0]){
359 moduleNumber = imod ;
360 z=n.Z() ;
361 x=TMath::Sign(n.Pt(),n.X()) ;
362 return ;
363 }
364 }
365 //Not in acceptance
366 x=0; z=0 ;
367 moduleNumber=0 ;
aa35fc01 368
aa35fc01 369}
370
371//____________________________________________________________________________
1c9d8212 372Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const
373{
e957fea8 374 // Tells if a particle enters PHOS
375 Bool_t in=kFALSE;
376 Int_t moduleNumber=0;
91daaf24 377 Double_t vtx[3]={particle->Vx(),particle->Vy(),particle->Vz()} ;
1c9d8212 378 Double_t z,x;
91daaf24 379 ImpactOnEmc(vtx,particle->Theta(),particle->Phi(),moduleNumber,z,x);
380 if(moduleNumber!=0)
e957fea8 381 in=kTRUE;
e957fea8 382 return in;
1c9d8212 383}
384
d15a28e7 385//____________________________________________________________________________
fd6f5ab1 386Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & absId) const
d15a28e7 387{
b2a60966 388 // Converts the relative numbering into the absolute numbering
ed4205d8 389 // EMCA crystals:
fd6f5ab1 390 // absId = from 1 to fNModules * fNPhi * fNZ
ed4205d8 391 // CPV pad:
fd6f5ab1 392 // absId = from N(total PHOS crystals) + 1
ed4205d8 393 // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ
d15a28e7 394
395 Bool_t rv = kTRUE ;
710f859a 396
397 if ( relid[1] == 0 ) { // it is a Phos crystal
fd6f5ab1 398 absId =
710f859a 399 ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules
400 + ( relid[2] - 1 ) * GetNZ() // the offset along phi
401 + relid[3] ; // the offset along z
d15a28e7 402 }
710f859a 403 else { // it is a CPV pad
fd6f5ab1 404 absId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads
710f859a 405 + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules
406 + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row
52a36ffd 407 + relid[3] ; // the column number
408 }
409
d15a28e7 410 return rv ;
411}
412
413//____________________________________________________________________________
fc7e2f43 414void AliPHOSGeometry::RelPosInAlice(Int_t id, TVector3 & pos ) const
d15a28e7 415{
a4e98857 416 // Converts the absolute numbering into the global ALICE coordinate system
b2a60966 417
91daaf24 418 if (!gGeoManager){
419 AliFatal("Geo manager not initialized\n");
420 }
ed4205d8 421
91daaf24 422 Int_t relid[4] ;
ed4205d8 423
91daaf24 424 AbsToRelNumbering(id , relid) ;
ed4205d8 425
91daaf24 426 //construct module name
427 char path[100] ;
428 if(relid[1]==0){ //this is EMC
429
8e20650f 430 Double_t ps[3]= {0.0,-fCryCellShift,0.}; //Position incide the crystal
91daaf24 431 Double_t psC[3]={0.0,0.0,0.}; //Global position
432
433 //Shift and possibly apply misalignment corrections
fd6f5ab1 434 Int_t nCellsXInStrip=fGeometryEMCA->GetNCellsXInStrip() ;
435 Int_t nCellsZInStrip=fGeometryEMCA->GetNCellsZInStrip() ;
436 Int_t strip=1+((Int_t) TMath::Ceil((Double_t)relid[2]/nCellsXInStrip))*fGeometryEMCA->GetNStripZ()-
437 (Int_t) TMath::Ceil((Double_t)relid[3]/nCellsZInStrip) ;
438 Int_t cellraw= relid[3]%nCellsZInStrip ;
439 if(cellraw==0)cellraw=nCellsZInStrip ;
440 Int_t cell= ((relid[2]-1)%nCellsXInStrip)*nCellsZInStrip + cellraw ;
91daaf24 441 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1/PSTR_%d/PCEL_%d",
442 relid[0],strip,cell) ;
443 if (!gGeoManager->cd(path)){
444 AliFatal("Geo manager can not find path \n");
445 }
446 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
447 if (m) m->LocalToMaster(ps,psC);
448 else{
449 AliFatal("Geo matrixes are not loaded \n") ;
450 }
fd6f5ab1 451 pos.SetXYZ(psC[0],psC[1],psC[2]) ;
91daaf24 452 }
453 else{
454 //first calculate position with respect to CPV plain
455 Int_t row = relid[2] ; //offset along x axis
456 Int_t column = relid[3] ; //offset along z axis
457 Double_t ps[3]= {0.0,GetCPVBoxSize(1)/2.,0.}; //Position on top of CPV
458 Double_t psC[3]={0.0,0.0,0.}; //Global position
459 pos[0] = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
460 pos[2] = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
461
462 //now apply possible shifts and rotations
463 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",relid[0]) ;
464 if (!gGeoManager->cd(path)){
465 AliFatal("Geo manager can not find path \n");
466 }
467 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
468 if (m) m->LocalToMaster(ps,psC);
469 else{
470 AliFatal("Geo matrixes are not loaded \n") ;
471 }
472 pos.SetXYZ(psC[0],psC[1],-psC[2]) ;
473 }
d15a28e7 474}
475
476//____________________________________________________________________________
fd6f5ab1 477void AliPHOSGeometry::RelPosToAbsId(Int_t module, Double_t x, Double_t z, Int_t & absId) const
842988a5 478{
479 // converts local PHOS-module (x, z) coordinates to absId
91daaf24 480
481 //find Global position
482 if (!gGeoManager){
483 AliFatal("Geo manager not initialized\n");
484 }
fd6f5ab1 485 Double_t posL[3]={x,-fCrystalShift,-z} ; //Only for EMC!!!
486 Double_t posG[3] ;
91daaf24 487 char path[100] ;
488 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",module) ;
91daaf24 489 if (!gGeoManager->cd(path)){
fd6f5ab1 490 AliFatal("Geo manager can not find path \n");
491 }
492 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
493 if (mPHOS){
494 mPHOS->LocalToMaster(posL,posG);
91daaf24 495 }
91daaf24 496 else{
497 AliFatal("Geo matrixes are not loaded \n") ;
498 }
fd6f5ab1 499
500 Int_t relid[4] ;
501 gGeoManager->FindNode(posG[0],posG[1],posG[2]) ;
91daaf24 502 //Check that path contains PSTR and extract strip number
503 TString cpath(gGeoManager->GetPath()) ;
504 Int_t indx = cpath.Index("PCEL") ;
505 if(indx==-1){ //for the few events when particle hits between srips use ideal geometry
506 relid[0] = module ;
507 relid[1] = 0 ;
508 relid[2] = static_cast<Int_t>(TMath::Ceil( x/ GetCellStep() + GetNPhi() / 2.) );
509 relid[3] = static_cast<Int_t>(TMath::Ceil(-z/ GetCellStep() + GetNZ() / 2.) ) ;
510 if(relid[2]<1)relid[2]=1 ;
511 if(relid[3]<1)relid[3]=1 ;
512 if(relid[2]>GetNPhi())relid[2]=GetNPhi() ;
513 if(relid[3]>GetNZ())relid[3]=GetNZ() ;
fd6f5ab1 514 RelToAbsNumbering(relid,absId) ;
91daaf24 515 }
516 else{
517 Int_t indx2 = cpath.Index("/",indx) ;
518 if(indx2==-1)
519 indx2=cpath.Length() ;
520 TString cell=cpath(indx+5,indx2-indx-5) ;
521 Int_t icell=cell.Atoi() ;
522 indx = cpath.Index("PSTR") ;
523 indx2 = cpath.Index("/",indx) ;
524 TString strip=cpath(indx+5,indx2-indx-5) ;
525 Int_t iStrip = strip.Atoi() ;
fd6f5ab1 526
527 Int_t row = fGeometryEMCA->GetNStripZ() - (iStrip - 1) % (fGeometryEMCA->GetNStripZ()) ;
528 Int_t col = (Int_t) TMath::Ceil((Double_t) iStrip/(fGeometryEMCA->GetNStripZ())) -1 ;
529
530 // Absid for 8x2-strips. Looks nice :)
531 absId = (module-1)*GetNCristalsInModule() +
532 row * 2 + (col*fGeometryEMCA->GetNCellsXInStrip() + (icell - 1) / 2)*GetNZ() - (icell & 1 ? 1 : 0);
533
91daaf24 534 }
535
842988a5 536}
537
538//____________________________________________________________________________
7b7c1533 539void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const
d15a28e7 540{
b2a60966 541 // Converts the relative numbering into the local PHOS-module (x, z) coordinates
52a36ffd 542 // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000)
b2a60966 543
d15a28e7 544
91daaf24 545 if (!gGeoManager){
546 AliFatal("Geo manager not initialized\n");
547 }
548 //construct module name
549 char path[100] ;
550 if(relid[1]==0){ //this is PHOS
551
552// Calculations using ideal geometry (obsolete)
553// x = - ( GetNPhi()/2. - relid[2] + 0.5 ) * GetCellStep() ; // position of Xtal with respect
554// z = - ( GetNZ() /2. - relid[3] + 0.5 ) * GetCellStep() ; // of center of PHOS module
555
fd6f5ab1 556 Double_t pos[3]= {0.0,-fCryCellShift,0.}; //Position incide the crystal
91daaf24 557 Double_t posC[3]={0.0,0.0,0.}; //Global position
558
559 //Shift and possibly apply misalignment corrections
fd6f5ab1 560 Int_t nCellsXInStrip=fGeometryEMCA->GetNCellsXInStrip() ;
561 Int_t nCellsZInStrip=fGeometryEMCA->GetNCellsZInStrip() ;
562// Int_t strip=1+(relid[3]-1)/fGeometryEMCA->GetNCellsZInStrip()+((relid[2]-1)/nCellsInStrip)*fGeometryEMCA->GetNStripZ() ;
563 Int_t strip=1+((Int_t) TMath::Ceil((Double_t)relid[2]/nCellsXInStrip))*fGeometryEMCA->GetNStripZ()-
564 (Int_t) TMath::Ceil((Double_t)relid[3]/nCellsZInStrip) ;
565 Int_t cellraw= relid[3]%nCellsZInStrip ;
566 if(cellraw==0)cellraw=nCellsZInStrip ;
567 Int_t cell= ((relid[2]-1)%nCellsXInStrip)*nCellsZInStrip + cellraw ;
91daaf24 568 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1/PSTR_%d/PCEL_%d",
569 relid[0],strip,cell) ;
570 if (!gGeoManager->cd(path)){
571 AliFatal("Geo manager can not find path \n");
572 }
573 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
574 if (m) m->LocalToMaster(pos,posC);
575 else{
576 AliFatal("Geo matrixes are not loaded \n") ;
577 }
578 //Return to PHOS local system
579 Double_t posL[3]={posC[0],posC[1],posC[2]};
580 sprintf(path,"/ALIC_1/PHOS_%d",relid[0]) ;
581 if (!gGeoManager->cd(path)){
582 AliFatal("Geo manager can not find path \n");
583 }
584 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
585 if (mPHOS) mPHOS->MasterToLocal(posC,posL);
586 else{
587 AliFatal("Geo matrixes are not loaded \n") ;
588 }
fd6f5ab1 589//printf("RelPosInMod: posL=[%f,%f,%f]\n",posL[0],posL[1],posL[2]) ;
91daaf24 590//printf("old: x=%f, z=%f \n",x,z);
591 x=posL[0] ;
fd6f5ab1 592 z=posL[1];
91daaf24 593 return ;
594 }
595 else{//CPV
596 //first calculate position with respect to CPV plain
597 Int_t row = relid[2] ; //offset along x axis
598 Int_t column = relid[3] ; //offset along z axis
599 Double_t pos[3]= {0.0,0.0,0.}; //Position incide the CPV printed circuit
600 Double_t posC[3]={0.0,0.0,0.}; //Global position
601 pos[0] = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
602 pos[2] = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
603
604 //now apply possible shifts and rotations
605 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",relid[0]) ;
606 if (!gGeoManager->cd(path)){
607 AliFatal("Geo manager can not find path \n");
608 }
609 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
610 if (m) m->LocalToMaster(pos,posC);
611 else{
612 AliFatal("Geo matrixes are not loaded \n") ;
613 }
614 //Return to PHOS local system
615 Double_t posL[3]={0.,0.,0.,} ;
616 sprintf(path,"/ALIC_1/PHOS_%d",relid[0]) ;
617 if (!gGeoManager->cd(path)){
618 AliFatal("Geo manager can not find path \n");
619 }
620 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
621 if (mPHOS) mPHOS->MasterToLocal(posC,posL);
622 else{
623 AliFatal("Geo matrixes are not loaded \n") ;
624 }
625 x=posL[0] ;
626 z=posL[1];
627 return ;
628
52a36ffd 629 }
91daaf24 630
2f3366b6 631}
aa0b9641 632
633//____________________________________________________________________________
634
7b51037f 635void AliPHOSGeometry::GetModuleCenter(TVector3& center,
636 const char *det,
637 Int_t module) const
aa0b9641 638{
bfc17d18 639 // Returns a position of the center of the CPV or EMC module
91daaf24 640 // in ideal (not misaligned) geometry
1504ac47 641 Float_t rDet = 0.;
e77bb310 642 if (strcmp(det,"CPV") == 0) rDet = GetIPtoCPVDistance ();
643 else if (strcmp(det,"EMC") == 0) rDet = GetIPtoCrystalSurface();
351dd634 644 else
645 AliFatal(Form("Wrong detector name %s",det));
bfc17d18 646
395f4eea 647 Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees
648 angle *= TMath::Pi()/180;
649 angle += 3*TMath::Pi()/2.;
7b51037f 650 center.SetXYZ(rDet*TMath::Cos(angle), rDet*TMath::Sin(angle), 0.);
aa0b9641 651}
652
653//____________________________________________________________________________
654
7b51037f 655void AliPHOSGeometry::Global2Local(TVector3& localPosition,
656 const TVector3& globalPosition,
657 Int_t module) const
aa0b9641 658{
bfc17d18 659 // Transforms a global position of the rec.point to the local coordinate system
91daaf24 660 //Return to PHOS local system
8e20650f 661 Double_t posG[3]={globalPosition.X(),globalPosition.Y(),globalPosition.Z()} ;
91daaf24 662 Double_t posL[3]={0.,0.,0.} ;
663 char path[100] ;
753b19cd 664 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",module) ;
665// sprintf(path,"/ALIC_1/PHOS_%d",module) ;
91daaf24 666 if (!gGeoManager->cd(path)){
667 AliFatal("Geo manager can not find path \n");
668 }
669 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
670 if (mPHOS) mPHOS->MasterToLocal(posG,posL);
671 else{
672 AliFatal("Geo matrixes are not loaded \n") ;
673 }
8e20650f 674 localPosition.SetXYZ(posL[0],posL[1]+fCrystalShift,-posL[2]) ;
91daaf24 675
676/*
395f4eea 677 Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees
678 angle *= TMath::Pi()/180;
679 angle += 3*TMath::Pi()/2.;
7b51037f 680 localPosition = globalPosition;
681 localPosition.RotateZ(-angle);
91daaf24 682*/
683}
684//____________________________________________________________________________
685void AliPHOSGeometry::Local2Global(Int_t mod, Float_t x, Float_t z,
686 TVector3& globalPosition) const
687{
688 char path[100] ;
689 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",mod) ;
8e20650f 690// sprintf(path,"/ALIC_1/PHOS_%d",mod) ;
91daaf24 691 if (!gGeoManager->cd(path)){
692 AliFatal("Geo manager can not find path \n");
693 }
8e20650f 694 Double_t posL[3]={x,-fCrystalShift,-z} ; //Only for EMC!!!
91daaf24 695 Double_t posG[3] ;
696 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
8e20650f 697 if (mPHOS){
698 mPHOS->LocalToMaster(posL,posG);
699 }
91daaf24 700 else{
701 AliFatal("Geo matrixes are not loaded \n") ;
702 }
8e20650f 703 globalPosition.SetXYZ(posG[0],posG[1],posG[2]) ;
91daaf24 704}
705//____________________________________________________________________________
407d15b3 706void AliPHOSGeometry::GetIncidentVector(const TVector3 &vtx, Int_t module, Float_t x,Float_t z, TVector3 &vInc) const {
91daaf24 707 //Calculates vector pointing from vertex to current poisition in module local frame
022ee411 708 //Note that PHOS local system and ALICE global have opposite z directions
91daaf24 709
753b19cd 710 Global2Local(vInc,vtx,module) ;
8e20650f 711 vInc.SetXYZ(vInc.X()+x,vInc.Y(),vInc.Z()+z) ;
aa0b9641 712}