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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 | //____________________________________________________________________________ |
3663622c | 50 | AliPHOSGeometry::AliPHOSGeometry() : |
51 | fNModules(0), | |
52 | fAngle(0.f), | |
53 | fPHOSAngle(0), | |
54 | fIPtoUpperCPVsurface(0), | |
55 | fRotMatrixArray(0), | |
56 | fGeometryEMCA(0), | |
57 | fGeometryCPV(0), | |
58 | fGeometrySUPP(0) | |
59 | { | |
e957fea8 | 60 | // default ctor |
61 | // must be kept public for root persistency purposes, but should never be called by the outside world | |
e957fea8 | 62 | fgGeom = 0 ; |
e957fea8 | 63 | } |
64 | ||
3663622c | 65 | //____________________________________________________________________________ |
66 | AliPHOSGeometry::AliPHOSGeometry(const AliPHOSGeometry & rhs) | |
67 | : AliGeometry(rhs), | |
68 | fNModules(rhs.fNModules), | |
69 | fAngle(rhs.fAngle), | |
70 | fPHOSAngle(0), | |
71 | fIPtoUpperCPVsurface(rhs.fIPtoUpperCPVsurface), | |
72 | fRotMatrixArray(0), | |
73 | fGeometryEMCA(0), | |
74 | fGeometryCPV(0), | |
75 | fGeometrySUPP(0) | |
76 | { | |
77 | Fatal("cpy ctor", "not implemented") ; | |
78 | } | |
79 | ||
80 | AliPHOSGeometry::AliPHOSGeometry(const Text_t* name, const Text_t* title) | |
81 | : AliGeometry(name, title), | |
82 | fNModules(0), | |
83 | fAngle(0.f), | |
84 | fPHOSAngle(0), | |
85 | fIPtoUpperCPVsurface(0), | |
86 | fRotMatrixArray(0), | |
87 | fGeometryEMCA(0), | |
88 | fGeometryCPV(0), | |
89 | fGeometrySUPP(0) | |
90 | { | |
91 | // ctor only for internal usage (singleton) | |
92 | Init() ; | |
93 | } | |
94 | ||
95 | ||
d15a28e7 | 96 | //____________________________________________________________________________ |
97 | AliPHOSGeometry::~AliPHOSGeometry(void) | |
98 | { | |
b2a60966 | 99 | // dtor |
100 | ||
52a36ffd | 101 | if (fRotMatrixArray) fRotMatrixArray->Delete() ; |
102 | if (fRotMatrixArray) delete fRotMatrixArray ; | |
fa0bc588 | 103 | if (fPHOSAngle ) delete[] fPHOSAngle ; |
52a36ffd | 104 | } |
52a36ffd | 105 | //____________________________________________________________________________ |
106 | ||
107 | void AliPHOSGeometry::Init(void) | |
108 | { | |
a4e98857 | 109 | // Initializes the PHOS parameters : |
110 | // IHEP is the Protvino CPV (cathode pad chambers) | |
710f859a | 111 | |
809cd394 | 112 | TString test(GetName()) ; |
22b8277f | 113 | if (test != "IHEP" ) { |
351dd634 | 114 | AliFatal(Form("%s is not a known geometry (choose among IHEP)", |
115 | test.Data() )) ; | |
809cd394 | 116 | } |
117 | ||
710f859a | 118 | fgInit = kTRUE ; |
05d33a3d | 119 | |
85698486 | 120 | fNModules = 5; |
121 | fAngle = 20; | |
05d33a3d | 122 | |
710f859a | 123 | fGeometryEMCA = new AliPHOSEMCAGeometry(); |
124 | ||
125 | fGeometryCPV = new AliPHOSCPVGeometry (); | |
126 | ||
127 | fGeometrySUPP = new AliPHOSSupportGeometry(); | |
128 | ||
129 | fPHOSAngle = new Float_t[fNModules] ; | |
130 | ||
131 | Float_t * emcParams = fGeometryEMCA->GetEMCParams() ; | |
132 | ||
581e32d4 | 133 | fPHOSParams[0] = TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2., |
a83b6179 | 134 | (Double_t)(emcParams[0] - (emcParams[1]-emcParams[0])* |
135 | fGeometryCPV->GetCPVBoxSize(1)/2/emcParams[3])); | |
710f859a | 136 | fPHOSParams[1] = emcParams[1] ; |
581e32d4 | 137 | fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.); |
710f859a | 138 | fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ; |
139 | ||
140 | fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ; | |
141 | ||
142 | Int_t index ; | |
143 | for ( index = 0; index < fNModules; index++ ) | |
52a36ffd | 144 | fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry() |
710f859a | 145 | |
710f859a | 146 | fRotMatrixArray = new TObjArray(fNModules) ; |
05d33a3d | 147 | |
85698486 | 148 | // Geometry parameters are calculated |
149 | ||
150 | SetPHOSAngles(); | |
151 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; | |
152 | Float_t r = GetIPtoOuterCoverDistance() + fPHOSParams[3] - GetCPVBoxSize(1) ; | |
153 | for (Int_t iModule=0; iModule<fNModules; iModule++) { | |
154 | fModuleCenter[iModule][0] = r * TMath::Sin(fPHOSAngle[iModule] / kRADDEG ); | |
155 | fModuleCenter[iModule][1] =-r * TMath::Cos(fPHOSAngle[iModule] / kRADDEG ); | |
156 | fModuleCenter[iModule][2] = 0.; | |
157 | ||
158 | fModuleAngle[iModule][0][0] = 90; | |
159 | fModuleAngle[iModule][0][1] = fPHOSAngle[iModule]; | |
160 | fModuleAngle[iModule][1][0] = 0; | |
161 | fModuleAngle[iModule][1][1] = 0; | |
162 | fModuleAngle[iModule][2][0] = 90; | |
163 | fModuleAngle[iModule][2][1] = 270 + fPHOSAngle[iModule]; | |
05d33a3d | 164 | } |
165 | ||
52a36ffd | 166 | } |
167 | ||
168 | //____________________________________________________________________________ | |
169 | AliPHOSGeometry * AliPHOSGeometry::GetInstance() | |
170 | { | |
a4e98857 | 171 | // Returns the pointer of the unique instance; singleton specific |
172 | ||
809cd394 | 173 | return static_cast<AliPHOSGeometry *>( fgGeom ) ; |
52a36ffd | 174 | } |
175 | ||
176 | //____________________________________________________________________________ | |
177 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) | |
178 | { | |
179 | // Returns the pointer of the unique instance | |
a4e98857 | 180 | // Creates it with the specified options (name, title) if it does not exist yet |
181 | ||
52a36ffd | 182 | AliPHOSGeometry * rv = 0 ; |
183 | if ( fgGeom == 0 ) { | |
184 | if ( strcmp(name,"") == 0 ) | |
185 | rv = 0 ; | |
186 | else { | |
187 | fgGeom = new AliPHOSGeometry(name, title) ; | |
188 | if ( fgInit ) | |
189 | rv = (AliPHOSGeometry * ) fgGeom ; | |
190 | else { | |
191 | rv = 0 ; | |
192 | delete fgGeom ; | |
193 | fgGeom = 0 ; | |
194 | } | |
195 | } | |
196 | } | |
197 | else { | |
21cd0c07 | 198 | if ( strcmp(fgGeom->GetName(), name) != 0 ) |
351dd634 | 199 | ::Error("GetInstance", "Current geometry is %s. You cannot call %s", |
200 | fgGeom->GetName(), name) ; | |
52a36ffd | 201 | else |
202 | rv = (AliPHOSGeometry *) fgGeom ; | |
203 | } | |
204 | return rv ; | |
205 | } | |
4697edca | 206 | |
52a36ffd | 207 | //____________________________________________________________________________ |
208 | void AliPHOSGeometry::SetPHOSAngles() | |
209 | { | |
a4e98857 | 210 | // Calculates the position of the PHOS modules in ALICE global coordinate system |
52a36ffd | 211 | |
a8c47ab6 | 212 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
710f859a | 213 | Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ; |
52a36ffd | 214 | pphi *= kRADDEG ; |
710f859a | 215 | if (pphi > fAngle){ |
351dd634 | 216 | AliError(Form("PHOS modules overlap!\n pphi = %f fAngle = %f", |
217 | pphi, fAngle)); | |
710f859a | 218 | |
219 | } | |
ed4205d8 | 220 | pphi = fAngle; |
52a36ffd | 221 | |
222 | for( Int_t i = 1; i <= fNModules ; i++ ) { | |
ed4205d8 | 223 | Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ; |
52a36ffd | 224 | fPHOSAngle[i-1] = - angle ; |
225 | } | |
d15a28e7 | 226 | } |
227 | ||
228 | //____________________________________________________________________________ | |
fc7e2f43 | 229 | Bool_t AliPHOSGeometry::AbsToRelNumbering(Int_t AbsId, Int_t * relid) const |
d15a28e7 | 230 | { |
b2a60966 | 231 | // Converts the absolute numbering into the following array/ |
232 | // relid[0] = PHOS Module number 1:fNModules | |
233 | // relid[1] = 0 if PbW04 | |
710f859a | 234 | // = -1 if CPV |
235 | // relid[2] = Row number inside a PHOS module | |
236 | // relid[3] = Column number inside a PHOS module | |
d15a28e7 | 237 | |
238 | Bool_t rv = kTRUE ; | |
92862013 | 239 | Float_t id = AbsId ; |
d15a28e7 | 240 | |
710f859a | 241 | Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / GetNCristalsInModule() ) ; |
d15a28e7 | 242 | |
710f859a | 243 | if ( phosmodulenumber > GetNModules() ) { // it is a CPV pad |
244 | ||
245 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
246 | Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ; | |
247 | relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ; | |
248 | relid[1] = -1 ; | |
249 | id -= ( relid[0] - 1 ) * nCPV ; | |
250 | relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ; | |
251 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ; | |
d15a28e7 | 252 | } |
710f859a | 253 | else { // it is a PW04 crystal |
d15a28e7 | 254 | |
92862013 | 255 | relid[0] = phosmodulenumber ; |
256 | relid[1] = 0 ; | |
257 | id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ; | |
710f859a | 258 | relid[2] = (Int_t)TMath::Ceil( id / GetNZ() ) ; |
259 | relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNZ() ) ; | |
d15a28e7 | 260 | } |
261 | return rv ; | |
262 | } | |
52a36ffd | 263 | |
9f616d61 | 264 | //____________________________________________________________________________ |
fc7e2f43 | 265 | void AliPHOSGeometry::EmcModuleCoverage(Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) const |
9f616d61 | 266 | { |
a4e98857 | 267 | // calculates the angular coverage in theta and phi of one 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 phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ; |
280 | Float_t y0 = GetIPtoCrystalSurface() ; | |
88cb7938 | 281 | Float_t * strip = fGeometryEMCA->GetStripHalfSize() ; |
282 | Float_t x0 = fGeometryEMCA->GetNStripX()*strip[0] ; | |
283 | Float_t z0 = fGeometryEMCA->GetNStripZ()*strip[2] ; | |
284 | Double_t angle = TMath::ATan( x0 / y0 ) ; | |
710f859a | 285 | phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 220 and 320 deg.) |
92862013 | 286 | Double_t max = phi - angle ; |
287 | Double_t min = phi + angle ; | |
288 | pM = TMath::Max(max, min) * conv ; | |
289 | pm = TMath::Min(max, min) * conv ; | |
9f616d61 | 290 | |
88cb7938 | 291 | angle = TMath::ATan( z0 / y0 ) ; |
92862013 | 292 | max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.) |
293 | min = TMath::Pi() / 2. - angle ; | |
294 | tM = TMath::Max(max, min) * conv ; | |
295 | tm = TMath::Min(max, min) * conv ; | |
9f616d61 | 296 | |
297 | } | |
298 | ||
299 | //____________________________________________________________________________ | |
7b7c1533 | 300 | void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) const |
9f616d61 | 301 | { |
a4e98857 | 302 | // calculates the angular coverage in theta and phi of a single crystal in a EMC(=PHOS) module |
9f616d61 | 303 | |
304 | Double_t conv ; | |
cf0c2bc1 | 305 | if ( opt == Radian() ) |
9f616d61 | 306 | conv = 1. ; |
cf0c2bc1 | 307 | else if ( opt == Degre() ) |
9f616d61 | 308 | conv = 180. / TMath::Pi() ; |
309 | else { | |
351dd634 | 310 | AliWarning(Form("%s unknown option; result in radian", opt)) ; |
9f616d61 | 311 | conv = 1. ; |
312 | } | |
313 | ||
710f859a | 314 | Float_t y0 = GetIPtoCrystalSurface() ; |
92862013 | 315 | theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ; |
316 | phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ; | |
9f616d61 | 317 | } |
318 | ||
319 | ||
320 | //____________________________________________________________________________ | |
e8d02863 | 321 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrixF & /*gmat*/) const |
d15a28e7 | 322 | { |
a4e98857 | 323 | // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system |
b2a60966 | 324 | |
d15a28e7 | 325 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 326 | TVector3 localposition ; |
d15a28e7 | 327 | |
328 | tmpPHOS->GetLocalPosition(gpos) ; | |
329 | ||
330 | ||
331 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
710f859a | 332 | { gpos.SetY( - GetIPtoCrystalSurface()) ; |
d15a28e7 | 333 | |
334 | } | |
335 | else | |
710f859a | 336 | { // it is a CPV |
337 | gpos.SetY(- GetIPtoUpperCPVsurface() ) ; | |
d15a28e7 | 338 | } |
339 | ||
92862013 | 340 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
a8c47ab6 | 341 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
92862013 | 342 | Float_t rphi = phi / kRADDEG ; |
d15a28e7 | 343 | |
92862013 | 344 | TRotation rot ; |
345 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 346 | |
92862013 | 347 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
348 | gpos.Transform(rot) ; // rotate the baby | |
6ad0bfa0 | 349 | |
d15a28e7 | 350 | } |
351 | ||
352 | //____________________________________________________________________________ | |
5cda30f6 | 353 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const |
d15a28e7 | 354 | { |
a4e98857 | 355 | // Calculates the coordinates of a RecPoint in the ALICE global coordinate system |
b2a60966 | 356 | |
d15a28e7 | 357 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 358 | TVector3 localposition ; |
d15a28e7 | 359 | tmpPHOS->GetLocalPosition(gpos) ; |
360 | ||
361 | ||
362 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
710f859a | 363 | { gpos.SetY( - GetIPtoCrystalSurface() ) ; |
d15a28e7 | 364 | } |
365 | else | |
710f859a | 366 | { // it is a CPV |
367 | gpos.SetY(- GetIPtoUpperCPVsurface() ) ; | |
d15a28e7 | 368 | } |
369 | ||
92862013 | 370 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
a8c47ab6 | 371 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
92862013 | 372 | Float_t rphi = phi / kRADDEG ; |
d15a28e7 | 373 | |
92862013 | 374 | TRotation rot ; |
375 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 376 | |
92862013 | 377 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
378 | gpos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 379 | } |
380 | ||
381 | //____________________________________________________________________________ | |
aa35fc01 | 382 | void AliPHOSGeometry::ImpactOnEmc(Double_t theta, Double_t phi, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
d15a28e7 | 383 | { |
a4e98857 | 384 | // calculates the impact coordinates on PHOS of a neutral particle |
385 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
d15a28e7 | 386 | |
52a36ffd | 387 | // searches for the PHOS EMC module |
aa35fc01 | 388 | |
389 | moduleNumber = 0 ; | |
52a36ffd | 390 | Double_t tm, tM, pm, pM ; |
391 | Int_t index = 1 ; | |
aa35fc01 | 392 | while ( moduleNumber == 0 && index <= GetNModules() ) { |
52a36ffd | 393 | EmcModuleCoverage(index, tm, tM, pm, pM) ; |
88cb7938 | 394 | if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) ) |
aa35fc01 | 395 | moduleNumber = index ; |
52a36ffd | 396 | index++ ; |
d15a28e7 | 397 | } |
aa35fc01 | 398 | if ( moduleNumber != 0 ) { |
399 | Float_t phi0 = GetPHOSAngle(moduleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ; | |
710f859a | 400 | Float_t y0 = GetIPtoCrystalSurface() ; |
88cb7938 | 401 | Double_t angle = phi - phi0; |
52a36ffd | 402 | x = y0 * TMath::Tan(angle) ; |
403 | angle = theta - TMath::Pi() / 2 ; | |
404 | z = y0 * TMath::Tan(angle) ; | |
d15a28e7 | 405 | } |
d15a28e7 | 406 | } |
407 | ||
aa35fc01 | 408 | //____________________________________________________________________________ |
7b51037f | 409 | void AliPHOSGeometry::ImpactOnEmc(const TVector3& vec, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
aa35fc01 | 410 | { |
411 | // calculates the impact coordinates on PHOS of a neutral particle | |
412 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
413 | // searches for the PHOS EMC module | |
414 | ||
7b51037f | 415 | Double_t theta = vec.Theta() ; |
416 | Double_t phi = vec.Phi() ; | |
417 | ||
418 | ImpactOnEmc(theta, phi, moduleNumber, z, x) ; | |
aa35fc01 | 419 | } |
420 | ||
421 | //____________________________________________________________________________ | |
7b51037f | 422 | void AliPHOSGeometry::ImpactOnEmc(const TParticle& p, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
aa35fc01 | 423 | { |
424 | // calculates the impact coordinates on PHOS of a neutral particle | |
425 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
426 | ||
427 | // searches for the PHOS EMC module | |
428 | Double_t theta = p.Theta() ; | |
429 | Double_t phi = p.Phi() ; | |
430 | ||
431 | ImpactOnEmc(theta, phi, moduleNumber, z, x) ; | |
432 | } | |
433 | ||
e957fea8 | 434 | //____________________________________________________________________________ |
1c9d8212 | 435 | Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const |
436 | { | |
e957fea8 | 437 | // Tells if a particle enters PHOS |
438 | Bool_t in=kFALSE; | |
439 | Int_t moduleNumber=0; | |
1c9d8212 | 440 | Double_t z,x; |
e957fea8 | 441 | ImpactOnEmc(particle->Theta(),particle->Phi(),moduleNumber,z,x); |
442 | if(moduleNumber) | |
443 | in=kTRUE; | |
444 | else | |
445 | in=kFALSE; | |
446 | return in; | |
1c9d8212 | 447 | } |
448 | ||
d15a28e7 | 449 | //____________________________________________________________________________ |
7b7c1533 | 450 | Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) const |
d15a28e7 | 451 | { |
b2a60966 | 452 | // Converts the relative numbering into the absolute numbering |
ed4205d8 | 453 | // EMCA crystals: |
454 | // AbsId = from 1 to fNModules * fNPhi * fNZ | |
ed4205d8 | 455 | // CPV pad: |
456 | // AbsId = from N(total PHOS crystals) + 1 | |
457 | // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ | |
d15a28e7 | 458 | |
459 | Bool_t rv = kTRUE ; | |
710f859a | 460 | |
461 | if ( relid[1] == 0 ) { // it is a Phos crystal | |
52a36ffd | 462 | AbsId = |
710f859a | 463 | ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules |
464 | + ( relid[2] - 1 ) * GetNZ() // the offset along phi | |
465 | + relid[3] ; // the offset along z | |
d15a28e7 | 466 | } |
710f859a | 467 | else { // it is a CPV pad |
468 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads | |
469 | + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules | |
470 | + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row | |
52a36ffd | 471 | + relid[3] ; // the column number |
472 | } | |
473 | ||
d15a28e7 | 474 | return rv ; |
475 | } | |
476 | ||
477 | //____________________________________________________________________________ | |
478 | ||
fc7e2f43 | 479 | void AliPHOSGeometry::RelPosInAlice(Int_t id, TVector3 & pos ) const |
d15a28e7 | 480 | { |
a4e98857 | 481 | // Converts the absolute numbering into the global ALICE coordinate system |
b2a60966 | 482 | |
ed4205d8 | 483 | |
484 | Int_t relid[4] ; | |
485 | ||
486 | AbsToRelNumbering(id , relid) ; | |
487 | ||
488 | Int_t phosmodule = relid[0] ; | |
489 | ||
490 | Float_t y0 = 0 ; | |
491 | ||
710f859a | 492 | if ( relid[1] == 0 ) // it is a PbW04 crystal |
493 | y0 = - GetIPtoCrystalSurface() ; | |
494 | else | |
495 | y0 = - GetIPtoUpperCPVsurface() ; | |
496 | ||
ed4205d8 | 497 | Float_t x, z ; |
498 | RelPosInModule(relid, x, z) ; | |
499 | ||
500 | pos.SetX(x) ; | |
501 | pos.SetZ(z) ; | |
710f859a | 502 | pos.SetY(y0) ; |
ed4205d8 | 503 | |
504 | Float_t phi = GetPHOSAngle( phosmodule) ; | |
a8c47ab6 | 505 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
ed4205d8 | 506 | Float_t rphi = phi / kRADDEG ; |
507 | ||
508 | TRotation rot ; | |
509 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
510 | ||
511 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame | |
512 | ||
513 | pos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 514 | } |
515 | ||
516 | //____________________________________________________________________________ | |
5d0435dd | 517 | void AliPHOSGeometry::RelPosToAbsId(Int_t module, Double_t x, Double_t z, Int_t & AbsId) const |
842988a5 | 518 | { |
519 | // converts local PHOS-module (x, z) coordinates to absId | |
520 | Int_t relid[4] ; | |
521 | relid[0] = module ; | |
522 | relid[1] = 0 ; | |
523 | relid[2] = static_cast<Int_t>(TMath::Ceil( x/ GetCellStep() + GetNPhi() / 2.) ); | |
524 | relid[3] = static_cast<Int_t>(TMath::Ceil(-z/ GetCellStep() + GetNZ() / 2.) ) ; | |
525 | ||
526 | RelToAbsNumbering(relid,AbsId) ; | |
527 | } | |
528 | ||
529 | //____________________________________________________________________________ | |
7b7c1533 | 530 | void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const |
d15a28e7 | 531 | { |
b2a60966 | 532 | // Converts the relative numbering into the local PHOS-module (x, z) coordinates |
52a36ffd | 533 | // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000) |
b2a60966 | 534 | |
786222b3 | 535 | Int_t row = relid[2] ; //offset along x axis |
536 | Int_t column = relid[3] ; //offset along z axis | |
d15a28e7 | 537 | |
ed4205d8 | 538 | |
66c3e8ff | 539 | if ( relid[1] == 0 ) { // its a PbW04 crystal |
540 | x = - ( GetNPhi()/2. - row + 0.5 ) * GetCellStep() ; // position of Xtal with respect | |
4a76d472 | 541 | z = - ( GetNZ() /2. - column + 0.5 ) * GetCellStep() ; // of center of PHOS module |
52a36ffd | 542 | } |
543 | else { | |
710f859a | 544 | x = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect |
4a76d472 | 545 | z = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module |
52a36ffd | 546 | } |
2f3366b6 | 547 | } |
aa0b9641 | 548 | |
549 | //____________________________________________________________________________ | |
550 | ||
7b51037f | 551 | void AliPHOSGeometry::GetModuleCenter(TVector3& center, |
552 | const char *det, | |
553 | Int_t module) const | |
aa0b9641 | 554 | { |
bfc17d18 | 555 | // Returns a position of the center of the CPV or EMC module |
1504ac47 | 556 | Float_t rDet = 0.; |
e77bb310 | 557 | if (strcmp(det,"CPV") == 0) rDet = GetIPtoCPVDistance (); |
558 | else if (strcmp(det,"EMC") == 0) rDet = GetIPtoCrystalSurface(); | |
351dd634 | 559 | else |
560 | AliFatal(Form("Wrong detector name %s",det)); | |
bfc17d18 | 561 | |
395f4eea | 562 | Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees |
563 | angle *= TMath::Pi()/180; | |
564 | angle += 3*TMath::Pi()/2.; | |
7b51037f | 565 | center.SetXYZ(rDet*TMath::Cos(angle), rDet*TMath::Sin(angle), 0.); |
aa0b9641 | 566 | } |
567 | ||
568 | //____________________________________________________________________________ | |
569 | ||
7b51037f | 570 | void AliPHOSGeometry::Global2Local(TVector3& localPosition, |
571 | const TVector3& globalPosition, | |
572 | Int_t module) const | |
aa0b9641 | 573 | { |
bfc17d18 | 574 | // Transforms a global position of the rec.point to the local coordinate system |
395f4eea | 575 | Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees |
576 | angle *= TMath::Pi()/180; | |
577 | angle += 3*TMath::Pi()/2.; | |
7b51037f | 578 | localPosition = globalPosition; |
579 | localPosition.RotateZ(-angle); | |
aa0b9641 | 580 | } |