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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" |
d15a28e7 | 34 | |
35 | // --- Standard library --- | |
36 | ||
d15a28e7 | 37 | // --- AliRoot header files --- |
351dd634 | 38 | #include "AliLog.h" |
d15a28e7 | 39 | #include "AliPHOSGeometry.h" |
468794ea | 40 | #include "AliPHOSEMCAGeometry.h" |
710f859a | 41 | #include "AliPHOSRecPoint.h" |
d15a28e7 | 42 | |
925e6570 | 43 | ClassImp(AliPHOSGeometry) |
d15a28e7 | 44 | |
a4e98857 | 45 | // these initialisations are needed for a singleton |
05d33a3d | 46 | AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ; |
47 | Bool_t AliPHOSGeometry::fgInit = kFALSE ; | |
9ec91567 | 48 | |
e957fea8 | 49 | //____________________________________________________________________________ |
50 | AliPHOSGeometry::AliPHOSGeometry() { | |
51 | // default ctor | |
52 | // must be kept public for root persistency purposes, but should never be called by the outside world | |
53 | fPHOSAngle = 0 ; | |
54 | fGeometryEMCA = 0 ; | |
55 | fGeometrySUPP = 0 ; | |
56 | fGeometryCPV = 0 ; | |
57 | fgGeom = 0 ; | |
58 | fRotMatrixArray = 0 ; | |
59 | } | |
60 | ||
d15a28e7 | 61 | //____________________________________________________________________________ |
62 | AliPHOSGeometry::~AliPHOSGeometry(void) | |
63 | { | |
b2a60966 | 64 | // dtor |
65 | ||
52a36ffd | 66 | if (fRotMatrixArray) fRotMatrixArray->Delete() ; |
67 | if (fRotMatrixArray) delete fRotMatrixArray ; | |
fa0bc588 | 68 | if (fPHOSAngle ) delete[] fPHOSAngle ; |
52a36ffd | 69 | } |
52a36ffd | 70 | //____________________________________________________________________________ |
71 | ||
72 | void AliPHOSGeometry::Init(void) | |
73 | { | |
a4e98857 | 74 | // Initializes the PHOS parameters : |
75 | // IHEP is the Protvino CPV (cathode pad chambers) | |
710f859a | 76 | |
809cd394 | 77 | TString test(GetName()) ; |
22b8277f | 78 | if (test != "IHEP" ) { |
351dd634 | 79 | AliFatal(Form("%s is not a known geometry (choose among IHEP)", |
80 | test.Data() )) ; | |
809cd394 | 81 | } |
82 | ||
710f859a | 83 | fgInit = kTRUE ; |
05d33a3d | 84 | |
85698486 | 85 | fNModules = 5; |
86 | fAngle = 20; | |
05d33a3d | 87 | |
710f859a | 88 | fGeometryEMCA = new AliPHOSEMCAGeometry(); |
89 | ||
90 | fGeometryCPV = new AliPHOSCPVGeometry (); | |
91 | ||
92 | fGeometrySUPP = new AliPHOSSupportGeometry(); | |
93 | ||
94 | fPHOSAngle = new Float_t[fNModules] ; | |
95 | ||
96 | Float_t * emcParams = fGeometryEMCA->GetEMCParams() ; | |
97 | ||
581e32d4 | 98 | fPHOSParams[0] = TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2., |
a83b6179 | 99 | (Double_t)(emcParams[0] - (emcParams[1]-emcParams[0])* |
100 | fGeometryCPV->GetCPVBoxSize(1)/2/emcParams[3])); | |
710f859a | 101 | fPHOSParams[1] = emcParams[1] ; |
581e32d4 | 102 | fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.); |
710f859a | 103 | fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ; |
104 | ||
105 | fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ; | |
106 | ||
107 | Int_t index ; | |
108 | for ( index = 0; index < fNModules; index++ ) | |
52a36ffd | 109 | fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry() |
710f859a | 110 | |
710f859a | 111 | fRotMatrixArray = new TObjArray(fNModules) ; |
05d33a3d | 112 | |
85698486 | 113 | // Geometry parameters are calculated |
114 | ||
115 | SetPHOSAngles(); | |
116 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; | |
117 | Float_t r = GetIPtoOuterCoverDistance() + fPHOSParams[3] - GetCPVBoxSize(1) ; | |
118 | for (Int_t iModule=0; iModule<fNModules; iModule++) { | |
119 | fModuleCenter[iModule][0] = r * TMath::Sin(fPHOSAngle[iModule] / kRADDEG ); | |
120 | fModuleCenter[iModule][1] =-r * TMath::Cos(fPHOSAngle[iModule] / kRADDEG ); | |
121 | fModuleCenter[iModule][2] = 0.; | |
122 | ||
123 | fModuleAngle[iModule][0][0] = 90; | |
124 | fModuleAngle[iModule][0][1] = fPHOSAngle[iModule]; | |
125 | fModuleAngle[iModule][1][0] = 0; | |
126 | fModuleAngle[iModule][1][1] = 0; | |
127 | fModuleAngle[iModule][2][0] = 90; | |
128 | fModuleAngle[iModule][2][1] = 270 + fPHOSAngle[iModule]; | |
05d33a3d | 129 | } |
130 | ||
52a36ffd | 131 | } |
132 | ||
133 | //____________________________________________________________________________ | |
134 | AliPHOSGeometry * AliPHOSGeometry::GetInstance() | |
135 | { | |
a4e98857 | 136 | // Returns the pointer of the unique instance; singleton specific |
137 | ||
809cd394 | 138 | return static_cast<AliPHOSGeometry *>( fgGeom ) ; |
52a36ffd | 139 | } |
140 | ||
141 | //____________________________________________________________________________ | |
142 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) | |
143 | { | |
144 | // Returns the pointer of the unique instance | |
a4e98857 | 145 | // Creates it with the specified options (name, title) if it does not exist yet |
146 | ||
52a36ffd | 147 | AliPHOSGeometry * rv = 0 ; |
148 | if ( fgGeom == 0 ) { | |
149 | if ( strcmp(name,"") == 0 ) | |
150 | rv = 0 ; | |
151 | else { | |
152 | fgGeom = new AliPHOSGeometry(name, title) ; | |
153 | if ( fgInit ) | |
154 | rv = (AliPHOSGeometry * ) fgGeom ; | |
155 | else { | |
156 | rv = 0 ; | |
157 | delete fgGeom ; | |
158 | fgGeom = 0 ; | |
159 | } | |
160 | } | |
161 | } | |
162 | else { | |
21cd0c07 | 163 | if ( strcmp(fgGeom->GetName(), name) != 0 ) |
351dd634 | 164 | ::Error("GetInstance", "Current geometry is %s. You cannot call %s", |
165 | fgGeom->GetName(), name) ; | |
52a36ffd | 166 | else |
167 | rv = (AliPHOSGeometry *) fgGeom ; | |
168 | } | |
169 | return rv ; | |
170 | } | |
4697edca | 171 | |
52a36ffd | 172 | //____________________________________________________________________________ |
173 | void AliPHOSGeometry::SetPHOSAngles() | |
174 | { | |
a4e98857 | 175 | // Calculates the position of the PHOS modules in ALICE global coordinate system |
52a36ffd | 176 | |
a8c47ab6 | 177 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
710f859a | 178 | Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ; |
52a36ffd | 179 | pphi *= kRADDEG ; |
710f859a | 180 | if (pphi > fAngle){ |
351dd634 | 181 | AliError(Form("PHOS modules overlap!\n pphi = %f fAngle = %f", |
182 | pphi, fAngle)); | |
710f859a | 183 | |
184 | } | |
ed4205d8 | 185 | pphi = fAngle; |
52a36ffd | 186 | |
187 | for( Int_t i = 1; i <= fNModules ; i++ ) { | |
ed4205d8 | 188 | Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ; |
52a36ffd | 189 | fPHOSAngle[i-1] = - angle ; |
190 | } | |
d15a28e7 | 191 | } |
192 | ||
193 | //____________________________________________________________________________ | |
fc7e2f43 | 194 | Bool_t AliPHOSGeometry::AbsToRelNumbering(Int_t AbsId, Int_t * relid) const |
d15a28e7 | 195 | { |
b2a60966 | 196 | // Converts the absolute numbering into the following array/ |
197 | // relid[0] = PHOS Module number 1:fNModules | |
198 | // relid[1] = 0 if PbW04 | |
710f859a | 199 | // = -1 if CPV |
200 | // relid[2] = Row number inside a PHOS module | |
201 | // relid[3] = Column number inside a PHOS module | |
d15a28e7 | 202 | |
203 | Bool_t rv = kTRUE ; | |
92862013 | 204 | Float_t id = AbsId ; |
d15a28e7 | 205 | |
710f859a | 206 | Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ; |
d15a28e7 | 207 | |
710f859a | 208 | if ( phosmodulenumber > GetNModules() ) { // it is a CPV pad |
209 | ||
210 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
211 | Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ; | |
212 | relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ; | |
213 | relid[1] = -1 ; | |
214 | id -= ( relid[0] - 1 ) * nCPV ; | |
215 | relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ; | |
216 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ; | |
d15a28e7 | 217 | } |
710f859a | 218 | else { // it is a PW04 crystal |
d15a28e7 | 219 | |
92862013 | 220 | relid[0] = phosmodulenumber ; |
221 | relid[1] = 0 ; | |
222 | id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ; | |
710f859a | 223 | relid[2] = (Int_t)TMath::Ceil( id / GetNZ() ) ; |
224 | relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNZ() ) ; | |
d15a28e7 | 225 | } |
226 | return rv ; | |
227 | } | |
52a36ffd | 228 | |
9f616d61 | 229 | //____________________________________________________________________________ |
fc7e2f43 | 230 | void AliPHOSGeometry::EmcModuleCoverage(Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) const |
9f616d61 | 231 | { |
a4e98857 | 232 | // calculates the angular coverage in theta and phi of one EMC (=PHOS) module |
9f616d61 | 233 | |
234 | Double_t conv ; | |
cf0c2bc1 | 235 | if ( opt == Radian() ) |
9f616d61 | 236 | conv = 1. ; |
cf0c2bc1 | 237 | else if ( opt == Degre() ) |
9f616d61 | 238 | conv = 180. / TMath::Pi() ; |
239 | else { | |
351dd634 | 240 | AliWarning(Form("%s unknown option; result in radian", opt)) ; |
9f616d61 | 241 | conv = 1. ; |
242 | } | |
243 | ||
710f859a | 244 | Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ; |
245 | Float_t y0 = GetIPtoCrystalSurface() ; | |
88cb7938 | 246 | Float_t * strip = fGeometryEMCA->GetStripHalfSize() ; |
247 | Float_t x0 = fGeometryEMCA->GetNStripX()*strip[0] ; | |
248 | Float_t z0 = fGeometryEMCA->GetNStripZ()*strip[2] ; | |
249 | Double_t angle = TMath::ATan( x0 / y0 ) ; | |
710f859a | 250 | phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 220 and 320 deg.) |
92862013 | 251 | Double_t max = phi - angle ; |
252 | Double_t min = phi + angle ; | |
253 | pM = TMath::Max(max, min) * conv ; | |
254 | pm = TMath::Min(max, min) * conv ; | |
9f616d61 | 255 | |
88cb7938 | 256 | angle = TMath::ATan( z0 / y0 ) ; |
92862013 | 257 | max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.) |
258 | min = TMath::Pi() / 2. - angle ; | |
259 | tM = TMath::Max(max, min) * conv ; | |
260 | tm = TMath::Min(max, min) * conv ; | |
9f616d61 | 261 | |
262 | } | |
263 | ||
264 | //____________________________________________________________________________ | |
7b7c1533 | 265 | void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) const |
9f616d61 | 266 | { |
a4e98857 | 267 | // calculates the angular coverage in theta and phi of a single crystal in a EMC(=PHOS) module |
9f616d61 | 268 | |
269 | Double_t conv ; | |
cf0c2bc1 | 270 | if ( opt == Radian() ) |
9f616d61 | 271 | conv = 1. ; |
cf0c2bc1 | 272 | else if ( opt == Degre() ) |
9f616d61 | 273 | conv = 180. / TMath::Pi() ; |
274 | else { | |
351dd634 | 275 | AliWarning(Form("%s unknown option; result in radian", opt)) ; |
9f616d61 | 276 | conv = 1. ; |
277 | } | |
278 | ||
710f859a | 279 | Float_t y0 = GetIPtoCrystalSurface() ; |
92862013 | 280 | theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ; |
281 | phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ; | |
9f616d61 | 282 | } |
283 | ||
284 | ||
285 | //____________________________________________________________________________ | |
e8d02863 | 286 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrixF & /*gmat*/) const |
d15a28e7 | 287 | { |
a4e98857 | 288 | // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system |
b2a60966 | 289 | |
d15a28e7 | 290 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 291 | TVector3 localposition ; |
d15a28e7 | 292 | |
293 | tmpPHOS->GetLocalPosition(gpos) ; | |
294 | ||
295 | ||
296 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
710f859a | 297 | { gpos.SetY( - GetIPtoCrystalSurface()) ; |
d15a28e7 | 298 | |
299 | } | |
300 | else | |
710f859a | 301 | { // it is a CPV |
302 | gpos.SetY(- GetIPtoUpperCPVsurface() ) ; | |
d15a28e7 | 303 | } |
304 | ||
92862013 | 305 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
a8c47ab6 | 306 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
92862013 | 307 | Float_t rphi = phi / kRADDEG ; |
d15a28e7 | 308 | |
92862013 | 309 | TRotation rot ; |
310 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 311 | |
92862013 | 312 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
313 | gpos.Transform(rot) ; // rotate the baby | |
6ad0bfa0 | 314 | |
d15a28e7 | 315 | } |
316 | ||
317 | //____________________________________________________________________________ | |
5cda30f6 | 318 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const |
d15a28e7 | 319 | { |
a4e98857 | 320 | // Calculates the coordinates of a RecPoint in the ALICE global coordinate system |
b2a60966 | 321 | |
d15a28e7 | 322 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 323 | TVector3 localposition ; |
d15a28e7 | 324 | tmpPHOS->GetLocalPosition(gpos) ; |
325 | ||
326 | ||
327 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
710f859a | 328 | { gpos.SetY( - GetIPtoCrystalSurface() ) ; |
d15a28e7 | 329 | } |
330 | else | |
710f859a | 331 | { // it is a CPV |
332 | gpos.SetY(- GetIPtoUpperCPVsurface() ) ; | |
d15a28e7 | 333 | } |
334 | ||
92862013 | 335 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
a8c47ab6 | 336 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
92862013 | 337 | Float_t rphi = phi / kRADDEG ; |
d15a28e7 | 338 | |
92862013 | 339 | TRotation rot ; |
340 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 341 | |
92862013 | 342 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
343 | gpos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 344 | } |
345 | ||
346 | //____________________________________________________________________________ | |
aa35fc01 | 347 | void AliPHOSGeometry::ImpactOnEmc(Double_t theta, Double_t phi, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
d15a28e7 | 348 | { |
a4e98857 | 349 | // calculates the impact coordinates on PHOS of a neutral particle |
350 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
d15a28e7 | 351 | |
52a36ffd | 352 | // searches for the PHOS EMC module |
aa35fc01 | 353 | |
354 | moduleNumber = 0 ; | |
52a36ffd | 355 | Double_t tm, tM, pm, pM ; |
356 | Int_t index = 1 ; | |
aa35fc01 | 357 | while ( moduleNumber == 0 && index <= GetNModules() ) { |
52a36ffd | 358 | EmcModuleCoverage(index, tm, tM, pm, pM) ; |
88cb7938 | 359 | if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) ) |
aa35fc01 | 360 | moduleNumber = index ; |
52a36ffd | 361 | index++ ; |
d15a28e7 | 362 | } |
aa35fc01 | 363 | if ( moduleNumber != 0 ) { |
364 | Float_t phi0 = GetPHOSAngle(moduleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ; | |
710f859a | 365 | Float_t y0 = GetIPtoCrystalSurface() ; |
88cb7938 | 366 | Double_t angle = phi - phi0; |
52a36ffd | 367 | x = y0 * TMath::Tan(angle) ; |
368 | angle = theta - TMath::Pi() / 2 ; | |
369 | z = y0 * TMath::Tan(angle) ; | |
d15a28e7 | 370 | } |
d15a28e7 | 371 | } |
372 | ||
aa35fc01 | 373 | //____________________________________________________________________________ |
7b51037f | 374 | void AliPHOSGeometry::ImpactOnEmc(const TVector3& vec, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
aa35fc01 | 375 | { |
376 | // calculates the impact coordinates on PHOS of a neutral particle | |
377 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
378 | // searches for the PHOS EMC module | |
379 | ||
7b51037f | 380 | Double_t theta = vec.Theta() ; |
381 | Double_t phi = vec.Phi() ; | |
382 | ||
383 | ImpactOnEmc(theta, phi, moduleNumber, z, x) ; | |
aa35fc01 | 384 | } |
385 | ||
386 | //____________________________________________________________________________ | |
7b51037f | 387 | void AliPHOSGeometry::ImpactOnEmc(const TParticle& p, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
aa35fc01 | 388 | { |
389 | // calculates the impact coordinates on PHOS of a neutral particle | |
390 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
391 | ||
392 | // searches for the PHOS EMC module | |
393 | Double_t theta = p.Theta() ; | |
394 | Double_t phi = p.Phi() ; | |
395 | ||
396 | ImpactOnEmc(theta, phi, moduleNumber, z, x) ; | |
397 | } | |
398 | ||
e957fea8 | 399 | //____________________________________________________________________________ |
1c9d8212 | 400 | Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const |
401 | { | |
e957fea8 | 402 | // Tells if a particle enters PHOS |
403 | Bool_t in=kFALSE; | |
404 | Int_t moduleNumber=0; | |
1c9d8212 | 405 | Double_t z,x; |
e957fea8 | 406 | ImpactOnEmc(particle->Theta(),particle->Phi(),moduleNumber,z,x); |
407 | if(moduleNumber) | |
408 | in=kTRUE; | |
409 | else | |
410 | in=kFALSE; | |
411 | return in; | |
1c9d8212 | 412 | } |
413 | ||
d15a28e7 | 414 | //____________________________________________________________________________ |
7b7c1533 | 415 | Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) const |
d15a28e7 | 416 | { |
b2a60966 | 417 | // Converts the relative numbering into the absolute numbering |
ed4205d8 | 418 | // EMCA crystals: |
419 | // AbsId = from 1 to fNModules * fNPhi * fNZ | |
ed4205d8 | 420 | // CPV pad: |
421 | // AbsId = from N(total PHOS crystals) + 1 | |
422 | // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ | |
d15a28e7 | 423 | |
424 | Bool_t rv = kTRUE ; | |
710f859a | 425 | |
426 | if ( relid[1] == 0 ) { // it is a Phos crystal | |
52a36ffd | 427 | AbsId = |
710f859a | 428 | ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules |
429 | + ( relid[2] - 1 ) * GetNZ() // the offset along phi | |
430 | + relid[3] ; // the offset along z | |
d15a28e7 | 431 | } |
710f859a | 432 | else { // it is a CPV pad |
433 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads | |
434 | + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules | |
435 | + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row | |
52a36ffd | 436 | + relid[3] ; // the column number |
437 | } | |
438 | ||
d15a28e7 | 439 | return rv ; |
440 | } | |
441 | ||
442 | //____________________________________________________________________________ | |
443 | ||
fc7e2f43 | 444 | void AliPHOSGeometry::RelPosInAlice(Int_t id, TVector3 & pos ) const |
d15a28e7 | 445 | { |
a4e98857 | 446 | // Converts the absolute numbering into the global ALICE coordinate system |
b2a60966 | 447 | |
ed4205d8 | 448 | |
449 | Int_t relid[4] ; | |
450 | ||
451 | AbsToRelNumbering(id , relid) ; | |
452 | ||
453 | Int_t phosmodule = relid[0] ; | |
454 | ||
455 | Float_t y0 = 0 ; | |
456 | ||
710f859a | 457 | if ( relid[1] == 0 ) // it is a PbW04 crystal |
458 | y0 = - GetIPtoCrystalSurface() ; | |
459 | else | |
460 | y0 = - GetIPtoUpperCPVsurface() ; | |
461 | ||
ed4205d8 | 462 | Float_t x, z ; |
463 | RelPosInModule(relid, x, z) ; | |
464 | ||
465 | pos.SetX(x) ; | |
466 | pos.SetZ(z) ; | |
710f859a | 467 | pos.SetY(y0) ; |
ed4205d8 | 468 | |
469 | Float_t phi = GetPHOSAngle( phosmodule) ; | |
a8c47ab6 | 470 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
ed4205d8 | 471 | Float_t rphi = phi / kRADDEG ; |
472 | ||
473 | TRotation rot ; | |
474 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
475 | ||
476 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame | |
477 | ||
478 | pos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 479 | } |
480 | ||
481 | //____________________________________________________________________________ | |
5d0435dd | 482 | void AliPHOSGeometry::RelPosToAbsId(Int_t module, Double_t x, Double_t z, Int_t & AbsId) const |
842988a5 | 483 | { |
484 | // converts local PHOS-module (x, z) coordinates to absId | |
485 | Int_t relid[4] ; | |
486 | relid[0] = module ; | |
487 | relid[1] = 0 ; | |
488 | relid[2] = static_cast<Int_t>(TMath::Ceil( x/ GetCellStep() + GetNPhi() / 2.) ); | |
489 | relid[3] = static_cast<Int_t>(TMath::Ceil(-z/ GetCellStep() + GetNZ() / 2.) ) ; | |
490 | ||
491 | RelToAbsNumbering(relid,AbsId) ; | |
492 | } | |
493 | ||
494 | //____________________________________________________________________________ | |
7b7c1533 | 495 | void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const |
d15a28e7 | 496 | { |
b2a60966 | 497 | // Converts the relative numbering into the local PHOS-module (x, z) coordinates |
52a36ffd | 498 | // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000) |
b2a60966 | 499 | |
786222b3 | 500 | Int_t row = relid[2] ; //offset along x axis |
501 | Int_t column = relid[3] ; //offset along z axis | |
d15a28e7 | 502 | |
ed4205d8 | 503 | |
66c3e8ff | 504 | if ( relid[1] == 0 ) { // its a PbW04 crystal |
505 | x = - ( GetNPhi()/2. - row + 0.5 ) * GetCellStep() ; // position of Xtal with respect | |
4a76d472 | 506 | z = - ( GetNZ() /2. - column + 0.5 ) * GetCellStep() ; // of center of PHOS module |
52a36ffd | 507 | } |
508 | else { | |
710f859a | 509 | x = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect |
4a76d472 | 510 | z = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module |
52a36ffd | 511 | } |
2f3366b6 | 512 | } |
aa0b9641 | 513 | |
514 | //____________________________________________________________________________ | |
515 | ||
7b51037f | 516 | void AliPHOSGeometry::GetModuleCenter(TVector3& center, |
517 | const char *det, | |
518 | Int_t module) const | |
aa0b9641 | 519 | { |
bfc17d18 | 520 | // Returns a position of the center of the CPV or EMC module |
1504ac47 | 521 | Float_t rDet = 0.; |
e77bb310 | 522 | if (strcmp(det,"CPV") == 0) rDet = GetIPtoCPVDistance (); |
523 | else if (strcmp(det,"EMC") == 0) rDet = GetIPtoCrystalSurface(); | |
351dd634 | 524 | else |
525 | AliFatal(Form("Wrong detector name %s",det)); | |
bfc17d18 | 526 | |
395f4eea | 527 | Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees |
528 | angle *= TMath::Pi()/180; | |
529 | angle += 3*TMath::Pi()/2.; | |
7b51037f | 530 | center.SetXYZ(rDet*TMath::Cos(angle), rDet*TMath::Sin(angle), 0.); |
aa0b9641 | 531 | } |
532 | ||
533 | //____________________________________________________________________________ | |
534 | ||
7b51037f | 535 | void AliPHOSGeometry::Global2Local(TVector3& localPosition, |
536 | const TVector3& globalPosition, | |
537 | Int_t module) const | |
aa0b9641 | 538 | { |
bfc17d18 | 539 | // Transforms a global position of the rec.point to the local coordinate system |
395f4eea | 540 | Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees |
541 | angle *= TMath::Pi()/180; | |
542 | angle += 3*TMath::Pi()/2.; | |
7b51037f | 543 | localPosition = globalPosition; |
544 | localPosition.RotateZ(-angle); | |
aa0b9641 | 545 | } |