Correction for actual vertex position implemented
[u/mrichter/AliRoot.git] / PHOS / AliPHOSGeometry.cxx
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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
e957fea8 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
3663622c 66//____________________________________________________________________________
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
d15a28e7 97//____________________________________________________________________________
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) ;
142
143 Int_t index ;
144 for ( index = 0; index < fNModules; index++ )
52a36ffd 145 fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry()
710f859a 146
710f859a 147 fRotMatrixArray = new TObjArray(fNModules) ;
05d33a3d 148
85698486 149 // Geometry parameters are calculated
150
151 SetPHOSAngles();
152 Double_t const kRADDEG = 180.0 / TMath::Pi() ;
153 Float_t r = GetIPtoOuterCoverDistance() + fPHOSParams[3] - GetCPVBoxSize(1) ;
154 for (Int_t iModule=0; iModule<fNModules; iModule++) {
155 fModuleCenter[iModule][0] = r * TMath::Sin(fPHOSAngle[iModule] / kRADDEG );
156 fModuleCenter[iModule][1] =-r * TMath::Cos(fPHOSAngle[iModule] / kRADDEG );
157 fModuleCenter[iModule][2] = 0.;
158
159 fModuleAngle[iModule][0][0] = 90;
160 fModuleAngle[iModule][0][1] = fPHOSAngle[iModule];
161 fModuleAngle[iModule][1][0] = 0;
162 fModuleAngle[iModule][1][1] = 0;
163 fModuleAngle[iModule][2][0] = 90;
164 fModuleAngle[iModule][2][1] = 270 + fPHOSAngle[iModule];
05d33a3d 165 }
166
52a36ffd 167}
168
169//____________________________________________________________________________
170AliPHOSGeometry * AliPHOSGeometry::GetInstance()
171{
a4e98857 172 // Returns the pointer of the unique instance; singleton specific
173
809cd394 174 return static_cast<AliPHOSGeometry *>( fgGeom ) ;
52a36ffd 175}
176
177//____________________________________________________________________________
178AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title)
179{
180 // Returns the pointer of the unique instance
a4e98857 181 // Creates it with the specified options (name, title) if it does not exist yet
182
52a36ffd 183 AliPHOSGeometry * rv = 0 ;
184 if ( fgGeom == 0 ) {
185 if ( strcmp(name,"") == 0 )
186 rv = 0 ;
187 else {
188 fgGeom = new AliPHOSGeometry(name, title) ;
189 if ( fgInit )
190 rv = (AliPHOSGeometry * ) fgGeom ;
191 else {
192 rv = 0 ;
193 delete fgGeom ;
194 fgGeom = 0 ;
195 }
196 }
197 }
198 else {
21cd0c07 199 if ( strcmp(fgGeom->GetName(), name) != 0 )
351dd634 200 ::Error("GetInstance", "Current geometry is %s. You cannot call %s",
201 fgGeom->GetName(), name) ;
52a36ffd 202 else
203 rv = (AliPHOSGeometry *) fgGeom ;
204 }
205 return rv ;
206}
4697edca 207
52a36ffd 208//____________________________________________________________________________
209void AliPHOSGeometry::SetPHOSAngles()
210{
a4e98857 211 // Calculates the position of the PHOS modules in ALICE global coordinate system
91daaf24 212 // in ideal geometry
52a36ffd 213
a8c47ab6 214 Double_t const kRADDEG = 180.0 / TMath::Pi() ;
710f859a 215 Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ;
52a36ffd 216 pphi *= kRADDEG ;
710f859a 217 if (pphi > fAngle){
351dd634 218 AliError(Form("PHOS modules overlap!\n pphi = %f fAngle = %f",
219 pphi, fAngle));
710f859a 220
221 }
ed4205d8 222 pphi = fAngle;
52a36ffd 223
224 for( Int_t i = 1; i <= fNModules ; i++ ) {
ed4205d8 225 Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ;
52a36ffd 226 fPHOSAngle[i-1] = - angle ;
227 }
d15a28e7 228}
229
230//____________________________________________________________________________
fc7e2f43 231Bool_t AliPHOSGeometry::AbsToRelNumbering(Int_t AbsId, Int_t * relid) const
d15a28e7 232{
91daaf24 233 // Converts the absolute numbering into the following array
b2a60966 234 // relid[0] = PHOS Module number 1:fNModules
235 // relid[1] = 0 if PbW04
710f859a 236 // = -1 if CPV
237 // relid[2] = Row number inside a PHOS module
238 // relid[3] = Column number inside a PHOS module
d15a28e7 239
240 Bool_t rv = kTRUE ;
92862013 241 Float_t id = AbsId ;
d15a28e7 242
710f859a 243 Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ;
d15a28e7 244
710f859a 245 if ( phosmodulenumber > GetNModules() ) { // it is a CPV pad
246
247 id -= GetNPhi() * GetNZ() * GetNModules() ;
248 Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ;
249 relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ;
250 relid[1] = -1 ;
251 id -= ( relid[0] - 1 ) * nCPV ;
252 relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ;
253 relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ;
d15a28e7 254 }
710f859a 255 else { // it is a PW04 crystal
d15a28e7 256
92862013 257 relid[0] = phosmodulenumber ;
258 relid[1] = 0 ;
259 id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ;
710f859a 260 relid[2] = (Int_t)TMath::Ceil( id / GetNZ() ) ;
261 relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNZ() ) ;
d15a28e7 262 }
263 return rv ;
264}
52a36ffd 265
9f616d61 266//____________________________________________________________________________
91daaf24 267void AliPHOSGeometry::GetGlobal(const AliRecPoint* recPoint, TVector3 & gpos) const
d15a28e7 268{
a4e98857 269 // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system
b2a60966 270
91daaf24 271 AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) recPoint ;
92862013 272 TVector3 localposition ;
d15a28e7 273
274 tmpPHOS->GetLocalPosition(gpos) ;
275
91daaf24 276 if (!gGeoManager){
277 AliFatal("Geo manager not initialized\n");
d15a28e7 278 }
91daaf24 279 //construct module name
280 char path[100] ;
281 Double_t dy ;
282 if(tmpPHOS->IsEmc()){
283 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",tmpPHOS->GetPHOSMod()) ;
284 //calculate offset to crystal surface
285 Float_t * inthermo = fGeometryEMCA->GetInnerThermoHalfSize() ;
286 Float_t * strip = fGeometryEMCA->GetStripHalfSize() ;
287 Float_t* splate = fGeometryEMCA->GetSupportPlateHalfSize();
288 Float_t * crystal = fGeometryEMCA->GetCrystalHalfSize() ;
289 Float_t * pin = fGeometryEMCA->GetAPDHalfSize() ;
290 Float_t * preamp = fGeometryEMCA->GetPreampHalfSize() ;
291 dy=-inthermo[1]+strip[1]+splate[1]+crystal[1]-fGeometryEMCA->GetAirGapLed()/2.+pin[1]+preamp[1] ;
d15a28e7 292 }
91daaf24 293 else{
294 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",tmpPHOS->GetPHOSMod()) ;
295 dy= GetCPVBoxSize(1)/2. ; //center of CPV module
296 }
297 Double_t pos[3]={gpos.X(),gpos.Y()-dy,gpos.Z()} ;
298 Double_t posC[3];
299 //now apply possible shifts and rotations
300 if (!gGeoManager->cd(path)){
301 AliFatal("Geo manager can not find path \n");
302 }
303 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
304 if (m) m->LocalToMaster(pos,posC);
305 else{
306 AliFatal("Geo matrixes are not loaded \n") ;
307 }
308 if(tmpPHOS->IsEmc())
309 gpos.SetXYZ(posC[0],posC[1],-posC[2]) ;
310 else
311 gpos.SetXYZ(posC[0],posC[1],posC[2]) ;
7b51037f 312
aa35fc01 313}
aa35fc01 314//____________________________________________________________________________
91daaf24 315void AliPHOSGeometry::ImpactOnEmc(Double_t * vtx, Double_t theta, Double_t phi,
316 Int_t & moduleNumber, Double_t & z, Double_t & x) const
aa35fc01 317{
318 // calculates the impact coordinates on PHOS of a neutral particle
91daaf24 319 // emitted in the vertex vtx[3] with direction theta and phi in the ALICE global coordinate system
320 TVector3 p(TMath::Sin(theta)*TMath::Cos(phi),TMath::Sin(theta)*TMath::Sin(phi),TMath::Cos(theta)) ;
321 TVector3 v(vtx[0],vtx[1],vtx[2]) ;
aa35fc01 322
91daaf24 323 //calculate offset to crystal surface
324 Float_t * inthermo = fGeometryEMCA->GetInnerThermoHalfSize() ;
325 Float_t * strip = fGeometryEMCA->GetStripHalfSize() ;
326 Float_t* splate = fGeometryEMCA->GetSupportPlateHalfSize();
327 Float_t * crystal = fGeometryEMCA->GetCrystalHalfSize() ;
328 Float_t * pin = fGeometryEMCA->GetAPDHalfSize() ;
329 Float_t * preamp = fGeometryEMCA->GetPreampHalfSize() ;
330 Float_t dy=-inthermo[1]+strip[1]+splate[1]+crystal[1]-fGeometryEMCA->GetAirGapLed()/2.+pin[1]+preamp[1] ;
331
332 if (!gGeoManager){
333 AliFatal("Geo manager not initialized\n");
334 }
335
336 for(Int_t imod=1; imod<=GetNModules() ; imod++){
337 //create vector from (0,0,0) to center of crystal surface of imod module
338 Double_t tmp[3]={0.,-dy,0.} ;
339
340 char path[100] ;
341 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",imod) ;
342 if (!gGeoManager->cd(path)){
343 AliFatal("Geo manager can not find path \n");
344 }
345 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
346 Double_t posG[3]={0.,0.,0.} ;
347 if (m) m->LocalToMaster(tmp,posG);
348 TVector3 n(posG[0],posG[1],-posG[2]) ;
349 Double_t direction=n.Dot(p) ;
350 if(direction<=0.)
351 continue ; //momentum directed FROM module
19c8ddd0 352 Double_t fr = (n.Mag2()-n.Dot(v))/direction ;
91daaf24 353 //Calculate direction in module plain
19c8ddd0 354 n-=v+fr*p ;
91daaf24 355 n*=-1. ;
356 Float_t * sz = fGeometryEMCA->GetInnerThermoHalfSize() ; //Wery close to the zise of the Xtl set
357 if(TMath::Abs(TMath::Abs(n.Z())<sz[2]) && n.Pt()<sz[0]){
358 moduleNumber = imod ;
359 z=n.Z() ;
360 x=TMath::Sign(n.Pt(),n.X()) ;
361 return ;
362 }
363 }
364 //Not in acceptance
365 x=0; z=0 ;
366 moduleNumber=0 ;
aa35fc01 367
aa35fc01 368}
369
e957fea8 370//____________________________________________________________________________
1c9d8212 371Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const
372{
e957fea8 373 // Tells if a particle enters PHOS
374 Bool_t in=kFALSE;
375 Int_t moduleNumber=0;
91daaf24 376 Double_t vtx[3]={particle->Vx(),particle->Vy(),particle->Vz()} ;
1c9d8212 377 Double_t z,x;
91daaf24 378 ImpactOnEmc(vtx,particle->Theta(),particle->Phi(),moduleNumber,z,x);
379 if(moduleNumber!=0)
e957fea8 380 in=kTRUE;
e957fea8 381 return in;
1c9d8212 382}
383
d15a28e7 384//____________________________________________________________________________
7b7c1533 385Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) const
d15a28e7 386{
b2a60966 387 // Converts the relative numbering into the absolute numbering
ed4205d8 388 // EMCA crystals:
389 // AbsId = from 1 to fNModules * fNPhi * fNZ
ed4205d8 390 // CPV pad:
391 // AbsId = from N(total PHOS crystals) + 1
392 // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ
d15a28e7 393
394 Bool_t rv = kTRUE ;
710f859a 395
396 if ( relid[1] == 0 ) { // it is a Phos crystal
52a36ffd 397 AbsId =
710f859a 398 ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules
399 + ( relid[2] - 1 ) * GetNZ() // the offset along phi
400 + relid[3] ; // the offset along z
d15a28e7 401 }
710f859a 402 else { // it is a CPV pad
403 AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads
404 + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules
405 + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row
52a36ffd 406 + relid[3] ; // the column number
407 }
408
d15a28e7 409 return rv ;
410}
411
412//____________________________________________________________________________
fc7e2f43 413void AliPHOSGeometry::RelPosInAlice(Int_t id, TVector3 & pos ) const
d15a28e7 414{
a4e98857 415 // Converts the absolute numbering into the global ALICE coordinate system
b2a60966 416
91daaf24 417 if (!gGeoManager){
418 AliFatal("Geo manager not initialized\n");
419 }
ed4205d8 420
91daaf24 421 Int_t relid[4] ;
ed4205d8 422
91daaf24 423 AbsToRelNumbering(id , relid) ;
ed4205d8 424
91daaf24 425 //construct module name
426 char path[100] ;
427 if(relid[1]==0){ //this is EMC
428
429 Float_t * xls = fGeometryEMCA->GetCrystalHalfSize() ;
430 Double_t ps[3]= {0.0,-xls[1],0.}; //Position incide the crystal
431 Double_t psC[3]={0.0,0.0,0.}; //Global position
432
433 //Shift and possibly apply misalignment corrections
434 Int_t nCellsInStrip=fGeometryEMCA->GetNCellsXInStrip() ;
19c8ddd0 435 Int_t strip=1+(relid[3]-1)/fGeometryEMCA->GetNCellsZInStrip()+((relid[2]-1)/nCellsInStrip)*fGeometryEMCA->GetNStripZ() ;
436 Int_t cell=fGeometryEMCA->GetNCellsZInStrip()*(1+(relid[2]-1)%nCellsInStrip)-(relid[3]-1)%fGeometryEMCA->GetNCellsZInStrip() ;
91daaf24 437 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1/PSTR_%d/PCEL_%d",
438 relid[0],strip,cell) ;
439 if (!gGeoManager->cd(path)){
440 AliFatal("Geo manager can not find path \n");
441 }
442 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
443 if (m) m->LocalToMaster(ps,psC);
444 else{
445 AliFatal("Geo matrixes are not loaded \n") ;
446 }
447 pos.SetXYZ(psC[0],psC[1],-psC[2]) ;
448 }
449 else{
450 //first calculate position with respect to CPV plain
451 Int_t row = relid[2] ; //offset along x axis
452 Int_t column = relid[3] ; //offset along z axis
453 Double_t ps[3]= {0.0,GetCPVBoxSize(1)/2.,0.}; //Position on top of CPV
454 Double_t psC[3]={0.0,0.0,0.}; //Global position
455 pos[0] = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
456 pos[2] = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
457
458 //now apply possible shifts and rotations
459 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",relid[0]) ;
460 if (!gGeoManager->cd(path)){
461 AliFatal("Geo manager can not find path \n");
462 }
463 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
464 if (m) m->LocalToMaster(ps,psC);
465 else{
466 AliFatal("Geo matrixes are not loaded \n") ;
467 }
468 pos.SetXYZ(psC[0],psC[1],-psC[2]) ;
469 }
d15a28e7 470}
471
472//____________________________________________________________________________
5d0435dd 473void AliPHOSGeometry::RelPosToAbsId(Int_t module, Double_t x, Double_t z, Int_t & AbsId) const
842988a5 474{
475 // converts local PHOS-module (x, z) coordinates to absId
91daaf24 476
477 //find Global position
478 if (!gGeoManager){
479 AliFatal("Geo manager not initialized\n");
480 }
842988a5 481 Int_t relid[4] ;
91daaf24 482 char path[100] ;
483 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",module) ;
484 Double_t lpos[3]={x,0.0,z} ;
485 Double_t gpos[3]={0.,0.,0.} ;
486 if (!gGeoManager->cd(path)){
487 AliFatal("Geo manager can not find path \n");
488 }
489 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
490 if (m) m->LocalToMaster(lpos,gpos);
491 else{
492 AliFatal("Geo matrixes are not loaded \n") ;
493 }
494 gGeoManager->FindNode(gpos[0],gpos[1],gpos[2]) ;
495 //Check that path contains PSTR and extract strip number
496 TString cpath(gGeoManager->GetPath()) ;
497 Int_t indx = cpath.Index("PCEL") ;
498 if(indx==-1){ //for the few events when particle hits between srips use ideal geometry
499 relid[0] = module ;
500 relid[1] = 0 ;
501 relid[2] = static_cast<Int_t>(TMath::Ceil( x/ GetCellStep() + GetNPhi() / 2.) );
502 relid[3] = static_cast<Int_t>(TMath::Ceil(-z/ GetCellStep() + GetNZ() / 2.) ) ;
503 if(relid[2]<1)relid[2]=1 ;
504 if(relid[3]<1)relid[3]=1 ;
505 if(relid[2]>GetNPhi())relid[2]=GetNPhi() ;
506 if(relid[3]>GetNZ())relid[3]=GetNZ() ;
507 }
508 else{
509 Int_t indx2 = cpath.Index("/",indx) ;
510 if(indx2==-1)
511 indx2=cpath.Length() ;
512 TString cell=cpath(indx+5,indx2-indx-5) ;
513 Int_t icell=cell.Atoi() ;
514 indx = cpath.Index("PSTR") ;
515 indx2 = cpath.Index("/",indx) ;
516 TString strip=cpath(indx+5,indx2-indx-5) ;
517 Int_t iStrip = strip.Atoi() ;
518 relid[0] = module ;
519 relid[1] = 0 ;
19c8ddd0 520 Int_t raw = fGeometryEMCA->GetNCellsXInStrip()*((iStrip-1)/fGeometryEMCA->GetNStripZ()) +
91daaf24 521 1 + (icell-1)/fGeometryEMCA->GetNCellsZInStrip() ;
522 Int_t col = fGeometryEMCA->GetNCellsZInStrip()*(1+(iStrip-1)%fGeometryEMCA->GetNStripZ()) -
523 (icell-1)%fGeometryEMCA->GetNCellsZInStrip() ;
524 if(col==0) col=GetNZ() ;
525 relid[2] = raw ;
526 relid[3] = col ;
527 }
528
842988a5 529 RelToAbsNumbering(relid,AbsId) ;
530}
531
532//____________________________________________________________________________
7b7c1533 533void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const
d15a28e7 534{
b2a60966 535 // Converts the relative numbering into the local PHOS-module (x, z) coordinates
52a36ffd 536 // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000)
b2a60966 537
d15a28e7 538
91daaf24 539 if (!gGeoManager){
540 AliFatal("Geo manager not initialized\n");
541 }
542 //construct module name
543 char path[100] ;
544 if(relid[1]==0){ //this is PHOS
545
546// Calculations using ideal geometry (obsolete)
547// x = - ( GetNPhi()/2. - relid[2] + 0.5 ) * GetCellStep() ; // position of Xtal with respect
548// z = - ( GetNZ() /2. - relid[3] + 0.5 ) * GetCellStep() ; // of center of PHOS module
549
550 Double_t pos[3]= {0.0,0.0,0.}; //Position incide the crystal (Y coordinalte is not important)
551 Double_t posC[3]={0.0,0.0,0.}; //Global position
552
553 //Shift and possibly apply misalignment corrections
554 Int_t nCellsInStrip=fGeometryEMCA->GetNCellsXInStrip() ;
555 Int_t strip=1+(relid[3]-1)/fGeometryEMCA->GetNCellsZInStrip()+((relid[2]-1)/nCellsInStrip)*fGeometryEMCA->GetNStripZ() ;
556 Int_t sellRaw = (relid[2]-1)%nCellsInStrip ;
557 Int_t cell=fGeometryEMCA->GetNCellsZInStrip()*(sellRaw+1) -(relid[3]-1)%fGeometryEMCA->GetNCellsZInStrip() ;
558 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1/PSTR_%d/PCEL_%d",
559 relid[0],strip,cell) ;
560 if (!gGeoManager->cd(path)){
561 AliFatal("Geo manager can not find path \n");
562 }
563 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
564 if (m) m->LocalToMaster(pos,posC);
565 else{
566 AliFatal("Geo matrixes are not loaded \n") ;
567 }
568 //Return to PHOS local system
569 Double_t posL[3]={posC[0],posC[1],posC[2]};
570 sprintf(path,"/ALIC_1/PHOS_%d",relid[0]) ;
571 if (!gGeoManager->cd(path)){
572 AliFatal("Geo manager can not find path \n");
573 }
574 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
575 if (mPHOS) mPHOS->MasterToLocal(posC,posL);
576 else{
577 AliFatal("Geo matrixes are not loaded \n") ;
578 }
579//printf("old: x=%f, z=%f \n",x,z);
580 x=posL[0] ;
581 z=-posL[1];
582//printf("Geo: x=%f, z=%f \n",x,z);
583 return ;
584 }
585 else{//CPV
586 //first calculate position with respect to CPV plain
587 Int_t row = relid[2] ; //offset along x axis
588 Int_t column = relid[3] ; //offset along z axis
589 Double_t pos[3]= {0.0,0.0,0.}; //Position incide the CPV printed circuit
590 Double_t posC[3]={0.0,0.0,0.}; //Global position
591 pos[0] = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect
592 pos[2] = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module
593
594 //now apply possible shifts and rotations
595 sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",relid[0]) ;
596 if (!gGeoManager->cd(path)){
597 AliFatal("Geo manager can not find path \n");
598 }
599 TGeoHMatrix *m = gGeoManager->GetCurrentMatrix();
600 if (m) m->LocalToMaster(pos,posC);
601 else{
602 AliFatal("Geo matrixes are not loaded \n") ;
603 }
604 //Return to PHOS local system
605 Double_t posL[3]={0.,0.,0.,} ;
606 sprintf(path,"/ALIC_1/PHOS_%d",relid[0]) ;
607 if (!gGeoManager->cd(path)){
608 AliFatal("Geo manager can not find path \n");
609 }
610 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
611 if (mPHOS) mPHOS->MasterToLocal(posC,posL);
612 else{
613 AliFatal("Geo matrixes are not loaded \n") ;
614 }
615 x=posL[0] ;
616 z=posL[1];
617 return ;
618
52a36ffd 619 }
91daaf24 620
2f3366b6 621}
aa0b9641 622
623//____________________________________________________________________________
624
7b51037f 625void AliPHOSGeometry::GetModuleCenter(TVector3& center,
626 const char *det,
627 Int_t module) const
aa0b9641 628{
bfc17d18 629 // Returns a position of the center of the CPV or EMC module
91daaf24 630 // in ideal (not misaligned) geometry
1504ac47 631 Float_t rDet = 0.;
e77bb310 632 if (strcmp(det,"CPV") == 0) rDet = GetIPtoCPVDistance ();
633 else if (strcmp(det,"EMC") == 0) rDet = GetIPtoCrystalSurface();
351dd634 634 else
635 AliFatal(Form("Wrong detector name %s",det));
bfc17d18 636
395f4eea 637 Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees
638 angle *= TMath::Pi()/180;
639 angle += 3*TMath::Pi()/2.;
7b51037f 640 center.SetXYZ(rDet*TMath::Cos(angle), rDet*TMath::Sin(angle), 0.);
aa0b9641 641}
642
643//____________________________________________________________________________
644
7b51037f 645void AliPHOSGeometry::Global2Local(TVector3& localPosition,
646 const TVector3& globalPosition,
647 Int_t module) const
aa0b9641 648{
bfc17d18 649 // Transforms a global position of the rec.point to the local coordinate system
91daaf24 650 //Return to PHOS local system
651 Double_t posG[3]={globalPosition.X(),globalPosition.Y(),globalPosition.Z()} ;
652 Double_t posL[3]={0.,0.,0.} ;
653 char path[100] ;
654 sprintf(path,"/ALIC_1/PHOS_%d",module) ;
655 if (!gGeoManager->cd(path)){
656 AliFatal("Geo manager can not find path \n");
657 }
658 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
659 if (mPHOS) mPHOS->MasterToLocal(posG,posL);
660 else{
661 AliFatal("Geo matrixes are not loaded \n") ;
662 }
663 localPosition.SetXYZ(posL[0],posL[1],posL[2]) ;
664
665/*
395f4eea 666 Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees
667 angle *= TMath::Pi()/180;
668 angle += 3*TMath::Pi()/2.;
7b51037f 669 localPosition = globalPosition;
670 localPosition.RotateZ(-angle);
91daaf24 671*/
672}
673//____________________________________________________________________________
674void AliPHOSGeometry::Local2Global(Int_t mod, Float_t x, Float_t z,
675 TVector3& globalPosition) const
676{
677 char path[100] ;
678 sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",mod) ;
679 if (!gGeoManager->cd(path)){
680 AliFatal("Geo manager can not find path \n");
681 }
682 //calculate offset to crystal surface
683 Float_t * inthermo = fGeometryEMCA->GetInnerThermoHalfSize() ;
684 Float_t * strip = fGeometryEMCA->GetStripHalfSize() ;
685 Float_t* splate = fGeometryEMCA->GetSupportPlateHalfSize();
686 Float_t * crystal = fGeometryEMCA->GetCrystalHalfSize() ;
687 Float_t * pin = fGeometryEMCA->GetAPDHalfSize() ;
688 Float_t * preamp = fGeometryEMCA->GetPreampHalfSize() ;
689 Float_t dy=-inthermo[1]+strip[1]+splate[1]+crystal[1]-fGeometryEMCA->GetAirGapLed()/2.+pin[1]+preamp[1] ;
690 Double_t posL[3]={x,dy,z} ;
691 Double_t posG[3] ;
692 TGeoHMatrix *mPHOS = gGeoManager->GetCurrentMatrix();
693 if (mPHOS) mPHOS->LocalToMaster(posL,posG);
694 else{
695 AliFatal("Geo matrixes are not loaded \n") ;
696 }
19c8ddd0 697 globalPosition.SetXYZ(posG[0],posG[1],-posG[2]) ;
91daaf24 698
699
700}
701//____________________________________________________________________________
407d15b3 702void AliPHOSGeometry::GetIncidentVector(const TVector3 &vtx, Int_t module, Float_t x,Float_t z, TVector3 &vInc) const {
91daaf24 703 //Calculates vector pointing from vertex to current poisition in module local frame
704
705 TVector3 global ;
706 Local2Global(module,x,z,global) ;
707 global-=vtx ;
708 Global2Local(vInc,global,module) ;
709
aa0b9641 710}