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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 | // |
710f859a | 27 | //*-- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (RRC "KI" & SUBATECH) |
d15a28e7 | 28 | |
29 | // --- ROOT system --- | |
30 | ||
31 | #include "TVector3.h" | |
32 | #include "TRotation.h" | |
fa7cce36 | 33 | #include "TFolder.h" |
34 | #include "TROOT.h" | |
d15a28e7 | 35 | |
36 | // --- Standard library --- | |
37 | ||
de9ec31b | 38 | #include <iostream.h> |
4410223b | 39 | #include <stdlib.h> |
d15a28e7 | 40 | |
41 | // --- AliRoot header files --- | |
42 | ||
43 | #include "AliPHOSGeometry.h" | |
468794ea | 44 | #include "AliPHOSEMCAGeometry.h" |
710f859a | 45 | #include "AliPHOSRecPoint.h" |
d15a28e7 | 46 | #include "AliConst.h" |
47 | ||
9ec91567 | 48 | ClassImp(AliPHOSGeometry) ; |
d15a28e7 | 49 | |
a4e98857 | 50 | // these initialisations are needed for a singleton |
9ec91567 | 51 | AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ; |
282c5906 | 52 | Bool_t AliPHOSGeometry::fgInit = kFALSE ; |
9ec91567 | 53 | |
d15a28e7 | 54 | //____________________________________________________________________________ |
55 | AliPHOSGeometry::~AliPHOSGeometry(void) | |
56 | { | |
b2a60966 | 57 | // dtor |
58 | ||
52a36ffd | 59 | if (fRotMatrixArray) fRotMatrixArray->Delete() ; |
60 | if (fRotMatrixArray) delete fRotMatrixArray ; | |
fa0bc588 | 61 | if (fPHOSAngle ) delete[] fPHOSAngle ; |
52a36ffd | 62 | } |
52a36ffd | 63 | //____________________________________________________________________________ |
64 | ||
65 | void AliPHOSGeometry::Init(void) | |
66 | { | |
a4e98857 | 67 | // Initializes the PHOS parameters : |
68 | // IHEP is the Protvino CPV (cathode pad chambers) | |
69 | // GPS2 is the Subatech Pre-Shower (two micromegas sandwiching a passive lead converter) | |
809cd394 | 70 | // MIXT 4 PHOS modules withe the IHEP CPV and one PHOS module with the Subatech Pre-Shower |
710f859a | 71 | |
809cd394 | 72 | TString test(GetName()) ; |
73 | if (test != "IHEP" && test != "GPS2" && test != "MIXT") { | |
74 | cerr << "ERROR: " << ClassName() << "::Init -> " << test.Data() | |
75 | << " is not a known geometry (choose among IHEP, GPS2 and MIXT)" << endl ; | |
76 | abort() ; | |
77 | } | |
78 | ||
710f859a | 79 | fgInit = kTRUE ; |
80 | ||
81 | fNModules = 5; | |
82 | fAngle = 20; | |
83 | ||
84 | fGeometryEMCA = new AliPHOSEMCAGeometry(); | |
85 | ||
86 | fGeometryCPV = new AliPHOSCPVGeometry (); | |
87 | ||
88 | fGeometrySUPP = new AliPHOSSupportGeometry(); | |
89 | ||
90 | fPHOSAngle = new Float_t[fNModules] ; | |
91 | ||
92 | Float_t * emcParams = fGeometryEMCA->GetEMCParams() ; | |
93 | ||
581e32d4 | 94 | fPHOSParams[0] = TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2., |
95 | (Double_t)(emcParams[0]*(fGeometryCPV->GetCPVBoxSize(1)+emcParams[3]) - | |
710f859a | 96 | emcParams[1]* fGeometryCPV->GetCPVBoxSize(1))/emcParams[3] ) ; |
97 | fPHOSParams[1] = emcParams[1] ; | |
581e32d4 | 98 | fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.); |
710f859a | 99 | fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ; |
100 | ||
101 | fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ; | |
102 | ||
103 | Int_t index ; | |
104 | for ( index = 0; index < fNModules; index++ ) | |
52a36ffd | 105 | fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry() |
710f859a | 106 | |
107 | this->SetPHOSAngles() ; | |
108 | fRotMatrixArray = new TObjArray(fNModules) ; | |
109 | ||
52a36ffd | 110 | } |
111 | ||
112 | //____________________________________________________________________________ | |
113 | AliPHOSGeometry * AliPHOSGeometry::GetInstance() | |
114 | { | |
a4e98857 | 115 | // Returns the pointer of the unique instance; singleton specific |
116 | ||
809cd394 | 117 | return static_cast<AliPHOSGeometry *>( fgGeom ) ; |
52a36ffd | 118 | } |
119 | ||
120 | //____________________________________________________________________________ | |
121 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) | |
122 | { | |
123 | // Returns the pointer of the unique instance | |
a4e98857 | 124 | // Creates it with the specified options (name, title) if it does not exist yet |
125 | ||
52a36ffd | 126 | AliPHOSGeometry * rv = 0 ; |
127 | if ( fgGeom == 0 ) { | |
128 | if ( strcmp(name,"") == 0 ) | |
129 | rv = 0 ; | |
130 | else { | |
131 | fgGeom = new AliPHOSGeometry(name, title) ; | |
132 | if ( fgInit ) | |
133 | rv = (AliPHOSGeometry * ) fgGeom ; | |
134 | else { | |
135 | rv = 0 ; | |
136 | delete fgGeom ; | |
137 | fgGeom = 0 ; | |
138 | } | |
139 | } | |
140 | } | |
141 | else { | |
142 | if ( strcmp(fgGeom->GetName(), name) != 0 ) { | |
143 | cout << "AliPHOSGeometry <E> : current geometry is " << fgGeom->GetName() << endl | |
144 | << " you cannot call " << name << endl ; | |
145 | } | |
146 | else | |
147 | rv = (AliPHOSGeometry *) fgGeom ; | |
148 | } | |
149 | return rv ; | |
150 | } | |
4697edca | 151 | |
52a36ffd | 152 | //____________________________________________________________________________ |
153 | void AliPHOSGeometry::SetPHOSAngles() | |
154 | { | |
a4e98857 | 155 | // Calculates the position of the PHOS modules in ALICE global coordinate system |
52a36ffd | 156 | |
157 | Double_t const kRADDEG = 180.0 / kPI ; | |
710f859a | 158 | Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ; |
52a36ffd | 159 | pphi *= kRADDEG ; |
710f859a | 160 | if (pphi > fAngle){ |
161 | cout << "AliPHOSGeometry: PHOS modules overlap!\n"; | |
162 | cout << "pphi = " << pphi << " fAngle " << fAngle << endl ; | |
163 | ||
164 | } | |
ed4205d8 | 165 | pphi = fAngle; |
52a36ffd | 166 | |
167 | for( Int_t i = 1; i <= fNModules ; i++ ) { | |
ed4205d8 | 168 | Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ; |
52a36ffd | 169 | fPHOSAngle[i-1] = - angle ; |
170 | } | |
d15a28e7 | 171 | } |
172 | ||
173 | //____________________________________________________________________________ | |
7b7c1533 | 174 | Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid) const |
d15a28e7 | 175 | { |
b2a60966 | 176 | // Converts the absolute numbering into the following array/ |
177 | // relid[0] = PHOS Module number 1:fNModules | |
178 | // relid[1] = 0 if PbW04 | |
710f859a | 179 | // = -1 if CPV |
180 | // relid[2] = Row number inside a PHOS module | |
181 | // relid[3] = Column number inside a PHOS module | |
d15a28e7 | 182 | |
183 | Bool_t rv = kTRUE ; | |
92862013 | 184 | Float_t id = AbsId ; |
d15a28e7 | 185 | |
710f859a | 186 | Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ; |
d15a28e7 | 187 | |
710f859a | 188 | if ( phosmodulenumber > GetNModules() ) { // it is a CPV pad |
189 | ||
190 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
191 | Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ; | |
192 | relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ; | |
193 | relid[1] = -1 ; | |
194 | id -= ( relid[0] - 1 ) * nCPV ; | |
195 | relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ; | |
196 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ; | |
d15a28e7 | 197 | } |
710f859a | 198 | else { // it is a PW04 crystal |
d15a28e7 | 199 | |
92862013 | 200 | relid[0] = phosmodulenumber ; |
201 | relid[1] = 0 ; | |
202 | id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ; | |
710f859a | 203 | relid[2] = (Int_t)TMath::Ceil( id / GetNZ() ) ; |
204 | relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNZ() ) ; | |
d15a28e7 | 205 | } |
206 | return rv ; | |
207 | } | |
52a36ffd | 208 | |
9f616d61 | 209 | //____________________________________________________________________________ |
7b7c1533 | 210 | void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) const |
9f616d61 | 211 | { |
a4e98857 | 212 | // calculates the angular coverage in theta and phi of one EMC (=PHOS) module |
9f616d61 | 213 | |
214 | Double_t conv ; | |
cf0c2bc1 | 215 | if ( opt == Radian() ) |
9f616d61 | 216 | conv = 1. ; |
cf0c2bc1 | 217 | else if ( opt == Degre() ) |
9f616d61 | 218 | conv = 180. / TMath::Pi() ; |
219 | else { | |
220 | cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ; | |
221 | conv = 1. ; | |
222 | } | |
223 | ||
710f859a | 224 | Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ; |
225 | Float_t y0 = GetIPtoCrystalSurface() ; | |
226 | Float_t * strip = fGeometryEMCA->GetStripHalfSize() ; | |
227 | Float_t x0 = fGeometryEMCA->GetNStripX()*strip[0] ; | |
228 | Float_t z0 = fGeometryEMCA->GetNStripZ()*strip[2] ; | |
229 | Double_t angle = TMath::ATan( x0 / y0 ) ; | |
230 | phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 220 and 320 deg.) | |
92862013 | 231 | Double_t max = phi - angle ; |
232 | Double_t min = phi + angle ; | |
233 | pM = TMath::Max(max, min) * conv ; | |
234 | pm = TMath::Min(max, min) * conv ; | |
9f616d61 | 235 | |
710f859a | 236 | angle = TMath::ATan( z0 / y0 ) ; |
92862013 | 237 | max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.) |
238 | min = TMath::Pi() / 2. - angle ; | |
239 | tM = TMath::Max(max, min) * conv ; | |
240 | tm = TMath::Min(max, min) * conv ; | |
9f616d61 | 241 | |
242 | } | |
243 | ||
244 | //____________________________________________________________________________ | |
7b7c1533 | 245 | void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) const |
9f616d61 | 246 | { |
a4e98857 | 247 | // calculates the angular coverage in theta and phi of a single crystal in a EMC(=PHOS) module |
9f616d61 | 248 | |
249 | Double_t conv ; | |
cf0c2bc1 | 250 | if ( opt == Radian() ) |
9f616d61 | 251 | conv = 1. ; |
cf0c2bc1 | 252 | else if ( opt == Degre() ) |
9f616d61 | 253 | conv = 180. / TMath::Pi() ; |
254 | else { | |
255 | cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ; | |
256 | conv = 1. ; | |
257 | } | |
258 | ||
710f859a | 259 | Float_t y0 = GetIPtoCrystalSurface() ; |
92862013 | 260 | theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ; |
261 | phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ; | |
9f616d61 | 262 | } |
263 | ||
264 | ||
265 | //____________________________________________________________________________ | |
52a36ffd | 266 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat) const |
d15a28e7 | 267 | { |
a4e98857 | 268 | // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system |
b2a60966 | 269 | |
d15a28e7 | 270 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 271 | TVector3 localposition ; |
d15a28e7 | 272 | |
273 | tmpPHOS->GetLocalPosition(gpos) ; | |
274 | ||
275 | ||
276 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
710f859a | 277 | { gpos.SetY( - GetIPtoCrystalSurface()) ; |
d15a28e7 | 278 | |
279 | } | |
280 | else | |
710f859a | 281 | { // it is a CPV |
282 | gpos.SetY(- GetIPtoUpperCPVsurface() ) ; | |
d15a28e7 | 283 | } |
284 | ||
92862013 | 285 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
286 | Double_t const kRADDEG = 180.0 / kPI ; | |
287 | Float_t rphi = phi / kRADDEG ; | |
d15a28e7 | 288 | |
92862013 | 289 | TRotation rot ; |
290 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 291 | |
92862013 | 292 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
293 | gpos.Transform(rot) ; // rotate the baby | |
6ad0bfa0 | 294 | |
d15a28e7 | 295 | } |
296 | ||
297 | //____________________________________________________________________________ | |
5cda30f6 | 298 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const |
d15a28e7 | 299 | { |
a4e98857 | 300 | // Calculates the coordinates of a RecPoint in the ALICE global coordinate system |
b2a60966 | 301 | |
d15a28e7 | 302 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 303 | TVector3 localposition ; |
d15a28e7 | 304 | tmpPHOS->GetLocalPosition(gpos) ; |
305 | ||
306 | ||
307 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
710f859a | 308 | { gpos.SetY( - GetIPtoCrystalSurface() ) ; |
d15a28e7 | 309 | } |
310 | else | |
710f859a | 311 | { // it is a CPV |
312 | gpos.SetY(- GetIPtoUpperCPVsurface() ) ; | |
d15a28e7 | 313 | } |
314 | ||
92862013 | 315 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
316 | Double_t const kRADDEG = 180.0 / kPI ; | |
317 | Float_t rphi = phi / kRADDEG ; | |
d15a28e7 | 318 | |
92862013 | 319 | TRotation rot ; |
320 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 321 | |
92862013 | 322 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
323 | gpos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 324 | } |
325 | ||
326 | //____________________________________________________________________________ | |
7b7c1533 | 327 | void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x) const |
d15a28e7 | 328 | { |
a4e98857 | 329 | // calculates the impact coordinates on PHOS of a neutral particle |
330 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
d15a28e7 | 331 | |
52a36ffd | 332 | // searches for the PHOS EMC module |
333 | ModuleNumber = 0 ; | |
334 | Double_t tm, tM, pm, pM ; | |
335 | Int_t index = 1 ; | |
336 | while ( ModuleNumber == 0 && index <= GetNModules() ) { | |
337 | EmcModuleCoverage(index, tm, tM, pm, pM) ; | |
338 | if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) ) | |
339 | ModuleNumber = index ; | |
340 | index++ ; | |
d15a28e7 | 341 | } |
52a36ffd | 342 | if ( ModuleNumber != 0 ) { |
343 | Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ; | |
710f859a | 344 | Float_t y0 = GetIPtoCrystalSurface() ; |
52a36ffd | 345 | Double_t angle = phi - phi0; |
346 | x = y0 * TMath::Tan(angle) ; | |
347 | angle = theta - TMath::Pi() / 2 ; | |
348 | z = y0 * TMath::Tan(angle) ; | |
d15a28e7 | 349 | } |
d15a28e7 | 350 | } |
351 | ||
1c9d8212 | 352 | Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const |
353 | { | |
354 | Bool_t In=kFALSE; | |
355 | Int_t ModuleNumber=0; | |
356 | Double_t z,x; | |
357 | ImpactOnEmc(particle->Theta(),particle->Phi(),ModuleNumber,z,x); | |
358 | if(ModuleNumber) In=kTRUE; | |
359 | else In=kFALSE; | |
360 | return In; | |
361 | } | |
362 | ||
d15a28e7 | 363 | //____________________________________________________________________________ |
7b7c1533 | 364 | Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) const |
d15a28e7 | 365 | { |
b2a60966 | 366 | // Converts the relative numbering into the absolute numbering |
ed4205d8 | 367 | // EMCA crystals: |
368 | // AbsId = from 1 to fNModules * fNPhi * fNZ | |
ed4205d8 | 369 | // CPV pad: |
370 | // AbsId = from N(total PHOS crystals) + 1 | |
371 | // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ | |
d15a28e7 | 372 | |
373 | Bool_t rv = kTRUE ; | |
710f859a | 374 | |
375 | if ( relid[1] == 0 ) { // it is a Phos crystal | |
52a36ffd | 376 | AbsId = |
710f859a | 377 | ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules |
378 | + ( relid[2] - 1 ) * GetNZ() // the offset along phi | |
379 | + relid[3] ; // the offset along z | |
d15a28e7 | 380 | } |
710f859a | 381 | else { // it is a CPV pad |
382 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads | |
383 | + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules | |
384 | + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row | |
52a36ffd | 385 | + relid[3] ; // the column number |
386 | } | |
387 | ||
d15a28e7 | 388 | return rv ; |
389 | } | |
390 | ||
391 | //____________________________________________________________________________ | |
392 | ||
7b7c1533 | 393 | void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos ) const |
d15a28e7 | 394 | { |
a4e98857 | 395 | // Converts the absolute numbering into the global ALICE coordinate system |
b2a60966 | 396 | |
ed4205d8 | 397 | |
398 | Int_t relid[4] ; | |
399 | ||
400 | AbsToRelNumbering(id , relid) ; | |
401 | ||
402 | Int_t phosmodule = relid[0] ; | |
403 | ||
404 | Float_t y0 = 0 ; | |
405 | ||
710f859a | 406 | if ( relid[1] == 0 ) // it is a PbW04 crystal |
407 | y0 = - GetIPtoCrystalSurface() ; | |
408 | else | |
409 | y0 = - GetIPtoUpperCPVsurface() ; | |
410 | ||
ed4205d8 | 411 | Float_t x, z ; |
412 | RelPosInModule(relid, x, z) ; | |
413 | ||
414 | pos.SetX(x) ; | |
415 | pos.SetZ(z) ; | |
710f859a | 416 | pos.SetY(y0) ; |
ed4205d8 | 417 | |
418 | Float_t phi = GetPHOSAngle( phosmodule) ; | |
419 | Double_t const kRADDEG = 180.0 / kPI ; | |
420 | Float_t rphi = phi / kRADDEG ; | |
421 | ||
422 | TRotation rot ; | |
423 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
424 | ||
425 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame | |
426 | ||
427 | pos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 428 | } |
429 | ||
430 | //____________________________________________________________________________ | |
7b7c1533 | 431 | void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const |
d15a28e7 | 432 | { |
b2a60966 | 433 | // Converts the relative numbering into the local PHOS-module (x, z) coordinates |
52a36ffd | 434 | // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000) |
b2a60966 | 435 | |
786222b3 | 436 | Int_t row = relid[2] ; //offset along x axis |
437 | Int_t column = relid[3] ; //offset along z axis | |
d15a28e7 | 438 | |
ed4205d8 | 439 | |
66c3e8ff | 440 | if ( relid[1] == 0 ) { // its a PbW04 crystal |
441 | x = - ( GetNPhi()/2. - row + 0.5 ) * GetCellStep() ; // position of Xtal with respect | |
442 | z = ( GetNZ() /2. - column + 0.5 ) * GetCellStep() ; // of center of PHOS module | |
52a36ffd | 443 | } |
444 | else { | |
710f859a | 445 | x = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect |
446 | z = ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module | |
52a36ffd | 447 | } |
2f3366b6 | 448 | } |