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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 ; | |
48 | AliPHOSAlignData * AliPHOSGeometry::fgAlignData = 0 ; | |
9ec91567 | 49 | |
e957fea8 | 50 | //____________________________________________________________________________ |
51 | AliPHOSGeometry::AliPHOSGeometry() { | |
52 | // default ctor | |
53 | // must be kept public for root persistency purposes, but should never be called by the outside world | |
54 | fPHOSAngle = 0 ; | |
55 | fGeometryEMCA = 0 ; | |
56 | fGeometrySUPP = 0 ; | |
57 | fGeometryCPV = 0 ; | |
58 | fgGeom = 0 ; | |
59 | fRotMatrixArray = 0 ; | |
60 | } | |
61 | ||
d15a28e7 | 62 | //____________________________________________________________________________ |
63 | AliPHOSGeometry::~AliPHOSGeometry(void) | |
64 | { | |
b2a60966 | 65 | // dtor |
66 | ||
52a36ffd | 67 | if (fRotMatrixArray) fRotMatrixArray->Delete() ; |
68 | if (fRotMatrixArray) delete fRotMatrixArray ; | |
fa0bc588 | 69 | if (fPHOSAngle ) delete[] fPHOSAngle ; |
52a36ffd | 70 | } |
52a36ffd | 71 | //____________________________________________________________________________ |
72 | ||
73 | void AliPHOSGeometry::Init(void) | |
74 | { | |
a4e98857 | 75 | // Initializes the PHOS parameters : |
76 | // IHEP is the Protvino CPV (cathode pad chambers) | |
710f859a | 77 | |
809cd394 | 78 | TString test(GetName()) ; |
22b8277f | 79 | if (test != "IHEP" ) { |
351dd634 | 80 | AliFatal(Form("%s is not a known geometry (choose among IHEP)", |
81 | test.Data() )) ; | |
809cd394 | 82 | } |
83 | ||
710f859a | 84 | fgInit = kTRUE ; |
05d33a3d | 85 | |
86 | // YK 23.02.2006 | |
87 | if(fgAlignData != NULL) { | |
88 | // Number of modules is read from Alignment DB if exists | |
89 | fNModules = fgAlignData->GetNModules(); | |
90 | } | |
91 | else { | |
92 | // Number of modules is fixed if Alignment DB does not exist | |
93 | fNModules = 5; | |
94 | fAngle = 20; | |
95 | } | |
96 | ||
710f859a | 97 | fGeometryEMCA = new AliPHOSEMCAGeometry(); |
98 | ||
99 | fGeometryCPV = new AliPHOSCPVGeometry (); | |
100 | ||
101 | fGeometrySUPP = new AliPHOSSupportGeometry(); | |
102 | ||
103 | fPHOSAngle = new Float_t[fNModules] ; | |
104 | ||
105 | Float_t * emcParams = fGeometryEMCA->GetEMCParams() ; | |
106 | ||
581e32d4 | 107 | fPHOSParams[0] = TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2., |
a83b6179 | 108 | (Double_t)(emcParams[0] - (emcParams[1]-emcParams[0])* |
109 | fGeometryCPV->GetCPVBoxSize(1)/2/emcParams[3])); | |
710f859a | 110 | fPHOSParams[1] = emcParams[1] ; |
581e32d4 | 111 | fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.); |
710f859a | 112 | fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ; |
113 | ||
114 | fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ; | |
115 | ||
116 | Int_t index ; | |
117 | for ( index = 0; index < fNModules; index++ ) | |
52a36ffd | 118 | fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry() |
710f859a | 119 | |
710f859a | 120 | fRotMatrixArray = new TObjArray(fNModules) ; |
05d33a3d | 121 | |
122 | // YK 23.02.2006 | |
123 | if(fgAlignData) { | |
124 | // Geometry parameters are read from Alignment DB if exists | |
125 | ||
126 | for (Int_t iModule=0; iModule<fNModules; iModule++) { | |
127 | for (Int_t iXYZ=0; iXYZ<3; iXYZ++) { | |
128 | fModuleCenter[iModule][iXYZ] = | |
129 | fgAlignData->GetModuleCenter(iModule,iXYZ); | |
130 | fModuleAngle[iModule][iXYZ][0] = | |
131 | fgAlignData->GetModuleAngle(iModule,iXYZ,0); | |
132 | fModuleAngle[iModule][iXYZ][1] = | |
133 | fgAlignData->GetModuleAngle(iModule,iXYZ,1); | |
134 | } | |
135 | } | |
136 | } | |
137 | else { | |
138 | // Geometry parameters are calculated if Alignment DB does not exist | |
139 | ||
140 | SetPHOSAngles(); | |
141 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; | |
142 | Float_t r = GetIPtoOuterCoverDistance() + fPHOSParams[3] - GetCPVBoxSize(1) ; | |
143 | for (Int_t iModule=0; iModule<fNModules; iModule++) { | |
144 | fModuleCenter[iModule][0] = r * TMath::Sin(fPHOSAngle[iModule] / kRADDEG ); | |
145 | fModuleCenter[iModule][1] =-r * TMath::Cos(fPHOSAngle[iModule] / kRADDEG ); | |
146 | fModuleCenter[iModule][2] = 0.; | |
147 | ||
148 | fModuleAngle[iModule][0][0] = 90; | |
149 | fModuleAngle[iModule][0][1] = fPHOSAngle[iModule]; | |
150 | fModuleAngle[iModule][1][0] = 0; | |
151 | fModuleAngle[iModule][1][1] = 0; | |
152 | fModuleAngle[iModule][2][0] = 90; | |
153 | fModuleAngle[iModule][2][1] = 270 + fPHOSAngle[iModule]; | |
154 | } | |
155 | } | |
156 | ||
52a36ffd | 157 | } |
158 | ||
159 | //____________________________________________________________________________ | |
160 | AliPHOSGeometry * AliPHOSGeometry::GetInstance() | |
161 | { | |
a4e98857 | 162 | // Returns the pointer of the unique instance; singleton specific |
163 | ||
809cd394 | 164 | return static_cast<AliPHOSGeometry *>( fgGeom ) ; |
52a36ffd | 165 | } |
166 | ||
167 | //____________________________________________________________________________ | |
168 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) | |
169 | { | |
170 | // Returns the pointer of the unique instance | |
a4e98857 | 171 | // Creates it with the specified options (name, title) if it does not exist yet |
172 | ||
52a36ffd | 173 | AliPHOSGeometry * rv = 0 ; |
174 | if ( fgGeom == 0 ) { | |
175 | if ( strcmp(name,"") == 0 ) | |
176 | rv = 0 ; | |
177 | else { | |
178 | fgGeom = new AliPHOSGeometry(name, title) ; | |
179 | if ( fgInit ) | |
180 | rv = (AliPHOSGeometry * ) fgGeom ; | |
181 | else { | |
182 | rv = 0 ; | |
183 | delete fgGeom ; | |
184 | fgGeom = 0 ; | |
185 | } | |
186 | } | |
187 | } | |
188 | else { | |
21cd0c07 | 189 | if ( strcmp(fgGeom->GetName(), name) != 0 ) |
351dd634 | 190 | ::Error("GetInstance", "Current geometry is %s. You cannot call %s", |
191 | fgGeom->GetName(), name) ; | |
52a36ffd | 192 | else |
193 | rv = (AliPHOSGeometry *) fgGeom ; | |
194 | } | |
195 | return rv ; | |
196 | } | |
4697edca | 197 | |
05d33a3d | 198 | //____________________________________________________________________________ |
199 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title, | |
200 | AliPHOSAlignData *alignda) | |
201 | { | |
202 | // Returns the pointer of the unique instance | |
203 | // Creates it with the specified options (name, title) if it does not exist yet | |
204 | ||
205 | fgAlignData = alignda; | |
206 | return GetInstance(name,title); | |
207 | } | |
208 | ||
52a36ffd | 209 | //____________________________________________________________________________ |
210 | void AliPHOSGeometry::SetPHOSAngles() | |
211 | { | |
a4e98857 | 212 | // Calculates the position of the PHOS modules in ALICE global coordinate system |
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 | 231 | Bool_t AliPHOSGeometry::AbsToRelNumbering(Int_t AbsId, Int_t * relid) const |
d15a28e7 | 232 | { |
b2a60966 | 233 | // Converts the absolute numbering into the following array/ |
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 | //____________________________________________________________________________ |
fc7e2f43 | 267 | void AliPHOSGeometry::EmcModuleCoverage(Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) const |
9f616d61 | 268 | { |
a4e98857 | 269 | // calculates the angular coverage in theta and phi of one EMC (=PHOS) module |
9f616d61 | 270 | |
271 | Double_t conv ; | |
cf0c2bc1 | 272 | if ( opt == Radian() ) |
9f616d61 | 273 | conv = 1. ; |
cf0c2bc1 | 274 | else if ( opt == Degre() ) |
9f616d61 | 275 | conv = 180. / TMath::Pi() ; |
276 | else { | |
351dd634 | 277 | AliWarning(Form("%s unknown option; result in radian", opt)) ; |
9f616d61 | 278 | conv = 1. ; |
279 | } | |
280 | ||
710f859a | 281 | Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ; |
282 | Float_t y0 = GetIPtoCrystalSurface() ; | |
88cb7938 | 283 | Float_t * strip = fGeometryEMCA->GetStripHalfSize() ; |
284 | Float_t x0 = fGeometryEMCA->GetNStripX()*strip[0] ; | |
285 | Float_t z0 = fGeometryEMCA->GetNStripZ()*strip[2] ; | |
286 | Double_t angle = TMath::ATan( x0 / y0 ) ; | |
710f859a | 287 | phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 220 and 320 deg.) |
92862013 | 288 | Double_t max = phi - angle ; |
289 | Double_t min = phi + angle ; | |
290 | pM = TMath::Max(max, min) * conv ; | |
291 | pm = TMath::Min(max, min) * conv ; | |
9f616d61 | 292 | |
88cb7938 | 293 | angle = TMath::ATan( z0 / y0 ) ; |
92862013 | 294 | max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.) |
295 | min = TMath::Pi() / 2. - angle ; | |
296 | tM = TMath::Max(max, min) * conv ; | |
297 | tm = TMath::Min(max, min) * conv ; | |
9f616d61 | 298 | |
299 | } | |
300 | ||
301 | //____________________________________________________________________________ | |
7b7c1533 | 302 | void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) const |
9f616d61 | 303 | { |
a4e98857 | 304 | // calculates the angular coverage in theta and phi of a single crystal in a EMC(=PHOS) module |
9f616d61 | 305 | |
306 | Double_t conv ; | |
cf0c2bc1 | 307 | if ( opt == Radian() ) |
9f616d61 | 308 | conv = 1. ; |
cf0c2bc1 | 309 | else if ( opt == Degre() ) |
9f616d61 | 310 | conv = 180. / TMath::Pi() ; |
311 | else { | |
351dd634 | 312 | AliWarning(Form("%s unknown option; result in radian", opt)) ; |
9f616d61 | 313 | conv = 1. ; |
314 | } | |
315 | ||
710f859a | 316 | Float_t y0 = GetIPtoCrystalSurface() ; |
92862013 | 317 | theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ; |
318 | phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ; | |
9f616d61 | 319 | } |
320 | ||
321 | ||
322 | //____________________________________________________________________________ | |
e8d02863 | 323 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrixF & /*gmat*/) const |
d15a28e7 | 324 | { |
a4e98857 | 325 | // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system |
b2a60966 | 326 | |
d15a28e7 | 327 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 328 | TVector3 localposition ; |
d15a28e7 | 329 | |
330 | tmpPHOS->GetLocalPosition(gpos) ; | |
331 | ||
332 | ||
333 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
710f859a | 334 | { gpos.SetY( - GetIPtoCrystalSurface()) ; |
d15a28e7 | 335 | |
336 | } | |
337 | else | |
710f859a | 338 | { // it is a CPV |
339 | gpos.SetY(- GetIPtoUpperCPVsurface() ) ; | |
d15a28e7 | 340 | } |
341 | ||
92862013 | 342 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
a8c47ab6 | 343 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
92862013 | 344 | Float_t rphi = phi / kRADDEG ; |
d15a28e7 | 345 | |
92862013 | 346 | TRotation rot ; |
347 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 348 | |
92862013 | 349 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
350 | gpos.Transform(rot) ; // rotate the baby | |
6ad0bfa0 | 351 | |
d15a28e7 | 352 | } |
353 | ||
354 | //____________________________________________________________________________ | |
5cda30f6 | 355 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const |
d15a28e7 | 356 | { |
a4e98857 | 357 | // Calculates the coordinates of a RecPoint in the ALICE global coordinate system |
b2a60966 | 358 | |
d15a28e7 | 359 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 360 | TVector3 localposition ; |
d15a28e7 | 361 | tmpPHOS->GetLocalPosition(gpos) ; |
362 | ||
363 | ||
364 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
710f859a | 365 | { gpos.SetY( - GetIPtoCrystalSurface() ) ; |
d15a28e7 | 366 | } |
367 | else | |
710f859a | 368 | { // it is a CPV |
369 | gpos.SetY(- GetIPtoUpperCPVsurface() ) ; | |
d15a28e7 | 370 | } |
371 | ||
92862013 | 372 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
a8c47ab6 | 373 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
92862013 | 374 | Float_t rphi = phi / kRADDEG ; |
d15a28e7 | 375 | |
92862013 | 376 | TRotation rot ; |
377 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 378 | |
92862013 | 379 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
380 | gpos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 381 | } |
382 | ||
383 | //____________________________________________________________________________ | |
aa35fc01 | 384 | void AliPHOSGeometry::ImpactOnEmc(Double_t theta, Double_t phi, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
d15a28e7 | 385 | { |
a4e98857 | 386 | // calculates the impact coordinates on PHOS of a neutral particle |
387 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
d15a28e7 | 388 | |
52a36ffd | 389 | // searches for the PHOS EMC module |
aa35fc01 | 390 | |
391 | moduleNumber = 0 ; | |
52a36ffd | 392 | Double_t tm, tM, pm, pM ; |
393 | Int_t index = 1 ; | |
aa35fc01 | 394 | while ( moduleNumber == 0 && index <= GetNModules() ) { |
52a36ffd | 395 | EmcModuleCoverage(index, tm, tM, pm, pM) ; |
88cb7938 | 396 | if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) ) |
aa35fc01 | 397 | moduleNumber = index ; |
52a36ffd | 398 | index++ ; |
d15a28e7 | 399 | } |
aa35fc01 | 400 | if ( moduleNumber != 0 ) { |
401 | Float_t phi0 = GetPHOSAngle(moduleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ; | |
710f859a | 402 | Float_t y0 = GetIPtoCrystalSurface() ; |
88cb7938 | 403 | Double_t angle = phi - phi0; |
52a36ffd | 404 | x = y0 * TMath::Tan(angle) ; |
405 | angle = theta - TMath::Pi() / 2 ; | |
406 | z = y0 * TMath::Tan(angle) ; | |
d15a28e7 | 407 | } |
d15a28e7 | 408 | } |
409 | ||
aa35fc01 | 410 | //____________________________________________________________________________ |
7b51037f | 411 | void AliPHOSGeometry::ImpactOnEmc(const TVector3& vec, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
aa35fc01 | 412 | { |
413 | // calculates the impact coordinates on PHOS of a neutral particle | |
414 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
415 | // searches for the PHOS EMC module | |
416 | ||
7b51037f | 417 | Double_t theta = vec.Theta() ; |
418 | Double_t phi = vec.Phi() ; | |
419 | ||
420 | ImpactOnEmc(theta, phi, moduleNumber, z, x) ; | |
aa35fc01 | 421 | } |
422 | ||
423 | //____________________________________________________________________________ | |
7b51037f | 424 | void AliPHOSGeometry::ImpactOnEmc(const TParticle& p, Int_t & moduleNumber, Double_t & z, Double_t & x) const |
aa35fc01 | 425 | { |
426 | // calculates the impact coordinates on PHOS of a neutral particle | |
427 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
428 | ||
429 | // searches for the PHOS EMC module | |
430 | Double_t theta = p.Theta() ; | |
431 | Double_t phi = p.Phi() ; | |
432 | ||
433 | ImpactOnEmc(theta, phi, moduleNumber, z, x) ; | |
434 | } | |
435 | ||
e957fea8 | 436 | //____________________________________________________________________________ |
1c9d8212 | 437 | Bool_t AliPHOSGeometry::Impact(const TParticle * particle) const |
438 | { | |
e957fea8 | 439 | // Tells if a particle enters PHOS |
440 | Bool_t in=kFALSE; | |
441 | Int_t moduleNumber=0; | |
1c9d8212 | 442 | Double_t z,x; |
e957fea8 | 443 | ImpactOnEmc(particle->Theta(),particle->Phi(),moduleNumber,z,x); |
444 | if(moduleNumber) | |
445 | in=kTRUE; | |
446 | else | |
447 | in=kFALSE; | |
448 | return in; | |
1c9d8212 | 449 | } |
450 | ||
d15a28e7 | 451 | //____________________________________________________________________________ |
7b7c1533 | 452 | Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) const |
d15a28e7 | 453 | { |
b2a60966 | 454 | // Converts the relative numbering into the absolute numbering |
ed4205d8 | 455 | // EMCA crystals: |
456 | // AbsId = from 1 to fNModules * fNPhi * fNZ | |
ed4205d8 | 457 | // CPV pad: |
458 | // AbsId = from N(total PHOS crystals) + 1 | |
459 | // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ | |
d15a28e7 | 460 | |
461 | Bool_t rv = kTRUE ; | |
710f859a | 462 | |
463 | if ( relid[1] == 0 ) { // it is a Phos crystal | |
52a36ffd | 464 | AbsId = |
710f859a | 465 | ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules |
466 | + ( relid[2] - 1 ) * GetNZ() // the offset along phi | |
467 | + relid[3] ; // the offset along z | |
d15a28e7 | 468 | } |
710f859a | 469 | else { // it is a CPV pad |
470 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads | |
471 | + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules | |
472 | + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row | |
52a36ffd | 473 | + relid[3] ; // the column number |
474 | } | |
475 | ||
d15a28e7 | 476 | return rv ; |
477 | } | |
478 | ||
479 | //____________________________________________________________________________ | |
480 | ||
fc7e2f43 | 481 | void AliPHOSGeometry::RelPosInAlice(Int_t id, TVector3 & pos ) const |
d15a28e7 | 482 | { |
a4e98857 | 483 | // Converts the absolute numbering into the global ALICE coordinate system |
b2a60966 | 484 | |
ed4205d8 | 485 | |
486 | Int_t relid[4] ; | |
487 | ||
488 | AbsToRelNumbering(id , relid) ; | |
489 | ||
490 | Int_t phosmodule = relid[0] ; | |
491 | ||
492 | Float_t y0 = 0 ; | |
493 | ||
710f859a | 494 | if ( relid[1] == 0 ) // it is a PbW04 crystal |
495 | y0 = - GetIPtoCrystalSurface() ; | |
496 | else | |
497 | y0 = - GetIPtoUpperCPVsurface() ; | |
498 | ||
ed4205d8 | 499 | Float_t x, z ; |
500 | RelPosInModule(relid, x, z) ; | |
501 | ||
502 | pos.SetX(x) ; | |
503 | pos.SetZ(z) ; | |
710f859a | 504 | pos.SetY(y0) ; |
ed4205d8 | 505 | |
506 | Float_t phi = GetPHOSAngle( phosmodule) ; | |
a8c47ab6 | 507 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; |
ed4205d8 | 508 | Float_t rphi = phi / kRADDEG ; |
509 | ||
510 | TRotation rot ; | |
511 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
512 | ||
513 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame | |
514 | ||
515 | pos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 516 | } |
517 | ||
518 | //____________________________________________________________________________ | |
5d0435dd | 519 | void AliPHOSGeometry::RelPosToAbsId(Int_t module, Double_t x, Double_t z, Int_t & AbsId) const |
842988a5 | 520 | { |
521 | // converts local PHOS-module (x, z) coordinates to absId | |
522 | Int_t relid[4] ; | |
523 | relid[0] = module ; | |
524 | relid[1] = 0 ; | |
525 | relid[2] = static_cast<Int_t>(TMath::Ceil( x/ GetCellStep() + GetNPhi() / 2.) ); | |
526 | relid[3] = static_cast<Int_t>(TMath::Ceil(-z/ GetCellStep() + GetNZ() / 2.) ) ; | |
527 | ||
528 | RelToAbsNumbering(relid,AbsId) ; | |
529 | } | |
530 | ||
531 | //____________________________________________________________________________ | |
7b7c1533 | 532 | void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const |
d15a28e7 | 533 | { |
b2a60966 | 534 | // Converts the relative numbering into the local PHOS-module (x, z) coordinates |
52a36ffd | 535 | // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000) |
b2a60966 | 536 | |
786222b3 | 537 | Int_t row = relid[2] ; //offset along x axis |
538 | Int_t column = relid[3] ; //offset along z axis | |
d15a28e7 | 539 | |
ed4205d8 | 540 | |
66c3e8ff | 541 | if ( relid[1] == 0 ) { // its a PbW04 crystal |
542 | x = - ( GetNPhi()/2. - row + 0.5 ) * GetCellStep() ; // position of Xtal with respect | |
4a76d472 | 543 | z = - ( GetNZ() /2. - column + 0.5 ) * GetCellStep() ; // of center of PHOS module |
52a36ffd | 544 | } |
545 | else { | |
710f859a | 546 | x = - ( GetNumberOfCPVPadsPhi()/2. - row - 0.5 ) * GetPadSizePhi() ; // position of pad with respect |
4a76d472 | 547 | z = - ( GetNumberOfCPVPadsZ() /2. - column - 0.5 ) * GetPadSizeZ() ; // of center of PHOS module |
52a36ffd | 548 | } |
2f3366b6 | 549 | } |
aa0b9641 | 550 | |
551 | //____________________________________________________________________________ | |
552 | ||
7b51037f | 553 | void AliPHOSGeometry::GetModuleCenter(TVector3& center, |
554 | const char *det, | |
555 | Int_t module) const | |
aa0b9641 | 556 | { |
bfc17d18 | 557 | // Returns a position of the center of the CPV or EMC module |
1504ac47 | 558 | Float_t rDet = 0.; |
e77bb310 | 559 | if (strcmp(det,"CPV") == 0) rDet = GetIPtoCPVDistance (); |
560 | else if (strcmp(det,"EMC") == 0) rDet = GetIPtoCrystalSurface(); | |
351dd634 | 561 | else |
562 | AliFatal(Form("Wrong detector name %s",det)); | |
bfc17d18 | 563 | |
395f4eea | 564 | Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees |
565 | angle *= TMath::Pi()/180; | |
566 | angle += 3*TMath::Pi()/2.; | |
7b51037f | 567 | center.SetXYZ(rDet*TMath::Cos(angle), rDet*TMath::Sin(angle), 0.); |
aa0b9641 | 568 | } |
569 | ||
570 | //____________________________________________________________________________ | |
571 | ||
7b51037f | 572 | void AliPHOSGeometry::Global2Local(TVector3& localPosition, |
573 | const TVector3& globalPosition, | |
574 | Int_t module) const | |
aa0b9641 | 575 | { |
bfc17d18 | 576 | // Transforms a global position of the rec.point to the local coordinate system |
395f4eea | 577 | Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees |
578 | angle *= TMath::Pi()/180; | |
579 | angle += 3*TMath::Pi()/2.; | |
7b51037f | 580 | localPosition = globalPosition; |
581 | localPosition.RotateZ(-angle); | |
aa0b9641 | 582 | } |