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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 |
20 | // The EMC modules are parametrized so that any configuration can be easily implemented | |
52a36ffd | 21 | // The title is used to identify the type of CPV used. |
b2a60966 | 22 | // |
23 | //*-- Author: Yves Schutz (SUBATECH) | |
d15a28e7 | 24 | |
25 | // --- ROOT system --- | |
26 | ||
27 | #include "TVector3.h" | |
28 | #include "TRotation.h" | |
29 | ||
30 | // --- Standard library --- | |
31 | ||
de9ec31b | 32 | #include <iostream.h> |
d15a28e7 | 33 | |
34 | // --- AliRoot header files --- | |
35 | ||
36 | #include "AliPHOSGeometry.h" | |
37 | #include "AliPHOSPpsdRecPoint.h" | |
38 | #include "AliConst.h" | |
39 | ||
9ec91567 | 40 | ClassImp(AliPHOSGeometry) ; |
d15a28e7 | 41 | |
9ec91567 | 42 | AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ; |
282c5906 | 43 | Bool_t AliPHOSGeometry::fgInit = kFALSE ; |
9ec91567 | 44 | |
d15a28e7 | 45 | //____________________________________________________________________________ |
46 | AliPHOSGeometry::~AliPHOSGeometry(void) | |
47 | { | |
b2a60966 | 48 | // dtor |
49 | ||
52a36ffd | 50 | if (fRotMatrixArray) fRotMatrixArray->Delete() ; |
51 | if (fRotMatrixArray) delete fRotMatrixArray ; | |
52 | if (fPHOSAngle ) delete fPHOSAngle ; | |
eb92d866 | 53 | // if (fGeometryEMCA ) detete fGeometryEMCA; |
54 | // if (fGeometryCPV ) detete fGeometryCPV ; | |
52a36ffd | 55 | } |
56 | ||
57 | //____________________________________________________________________________ | |
58 | ||
59 | void AliPHOSGeometry::Init(void) | |
60 | { | |
61 | // Initializes the PHOS parameters | |
62 | ||
63 | cout << "PHOS geometry setup: parameters for option " << fName << " " << fTitle << endl ; | |
64 | if ( ((strcmp( fName, "default" )) == 0) || | |
65 | ((strcmp( fName, "GPS2" )) == 0) || | |
66 | ((strcmp( fName, "IHEP" )) == 0) ) { | |
67 | fgInit = kTRUE ; | |
eb92d866 | 68 | fGeometryEMCA = new AliPHOSEMCAGeometry(); |
69 | if ( ((strcmp( fName, "GPS2" )) == 0) ) fGeometryCPV = new AliPHOSPPSDGeometry(); | |
70 | if ( ((strcmp( fName, "IHEP" )) == 0) ) fGeometryCPV = new AliPHOSCPVGeometry (); | |
52a36ffd | 71 | fNModules = 5; |
72 | fPHOSAngle = new Float_t[fNModules] ; | |
73 | Int_t index ; | |
74 | for ( index = 0; index < fNModules; index++ ) | |
75 | fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry() | |
76 | ||
77 | this->SetPHOSAngles() ; | |
78 | fRotMatrixArray = new TObjArray(fNModules) ; | |
79 | } | |
80 | else { | |
81 | fgInit = kFALSE ; | |
82 | cout << "PHOS Geometry setup: option not defined " << fName << endl ; | |
83 | } | |
84 | } | |
85 | ||
86 | //____________________________________________________________________________ | |
87 | AliPHOSGeometry * AliPHOSGeometry::GetInstance() | |
88 | { | |
89 | // Returns the pointer of the unique instance | |
90 | return (AliPHOSGeometry *) fgGeom ; | |
91 | } | |
92 | ||
93 | //____________________________________________________________________________ | |
94 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) | |
95 | { | |
96 | // Returns the pointer of the unique instance | |
97 | AliPHOSGeometry * rv = 0 ; | |
98 | if ( fgGeom == 0 ) { | |
99 | if ( strcmp(name,"") == 0 ) | |
100 | rv = 0 ; | |
101 | else { | |
102 | fgGeom = new AliPHOSGeometry(name, title) ; | |
103 | if ( fgInit ) | |
104 | rv = (AliPHOSGeometry * ) fgGeom ; | |
105 | else { | |
106 | rv = 0 ; | |
107 | delete fgGeom ; | |
108 | fgGeom = 0 ; | |
109 | } | |
110 | } | |
111 | } | |
112 | else { | |
113 | if ( strcmp(fgGeom->GetName(), name) != 0 ) { | |
114 | cout << "AliPHOSGeometry <E> : current geometry is " << fgGeom->GetName() << endl | |
115 | << " you cannot call " << name << endl ; | |
116 | } | |
117 | else | |
118 | rv = (AliPHOSGeometry *) fgGeom ; | |
119 | } | |
120 | return rv ; | |
121 | } | |
4697edca | 122 | |
52a36ffd | 123 | //____________________________________________________________________________ |
124 | void AliPHOSGeometry::SetPHOSAngles() | |
125 | { | |
126 | // Calculates the position in ALICE of the PHOS modules | |
127 | ||
128 | Double_t const kRADDEG = 180.0 / kPI ; | |
129 | Float_t pphi = TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoOuterCoverDistance() ) ) ; | |
130 | pphi *= kRADDEG ; | |
131 | ||
132 | for( Int_t i = 1; i <= fNModules ; i++ ) { | |
133 | Float_t angle = pphi * 2 * ( i - fNModules / 2.0 - 0.5 ) ; | |
134 | fPHOSAngle[i-1] = - angle ; | |
135 | } | |
d15a28e7 | 136 | } |
137 | ||
138 | //____________________________________________________________________________ | |
92862013 | 139 | Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid) |
d15a28e7 | 140 | { |
b2a60966 | 141 | // Converts the absolute numbering into the following array/ |
142 | // relid[0] = PHOS Module number 1:fNModules | |
143 | // relid[1] = 0 if PbW04 | |
144 | // = PPSD Module number 1:fNumberOfModulesPhi*fNumberOfModulesZ*2 (2->up and bottom level) | |
145 | // relid[2] = Row number inside a PHOS or PPSD module | |
146 | // relid[3] = Column number inside a PHOS or PPSD module | |
d15a28e7 | 147 | |
148 | Bool_t rv = kTRUE ; | |
92862013 | 149 | Float_t id = AbsId ; |
d15a28e7 | 150 | |
92862013 | 151 | Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / ( GetNPhi() * GetNZ() ) ) ; |
d15a28e7 | 152 | |
52a36ffd | 153 | if ( phosmodulenumber > GetNModules() ) { // it is a PPSD or CPV pad |
154 | ||
155 | if ( strcmp(fName,"GPS2") == 0 ) { | |
156 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
157 | Float_t tempo = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
158 | relid[0] = (Int_t)TMath::Ceil( id / tempo ) ; | |
159 | id -= ( relid[0] - 1 ) * tempo ; | |
160 | relid[1] = (Int_t)TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ; | |
161 | id -= ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
162 | relid[2] = (Int_t)TMath::Ceil( id / GetNumberOfPadsPhi() ) ; | |
163 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsPhi() ) ; | |
164 | } | |
165 | else if ( strcmp(fName,"IHEP") == 0 ) { | |
166 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
167 | relid[0] = (Int_t) TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ; | |
168 | relid[1] = 1 ; | |
169 | id -= ( relid[0] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
170 | relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfPadsZ() ) ; | |
171 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsZ() ) ; | |
172 | } | |
d15a28e7 | 173 | } |
174 | else { // its a PW04 crystal | |
175 | ||
92862013 | 176 | relid[0] = phosmodulenumber ; |
177 | relid[1] = 0 ; | |
178 | id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ; | |
179 | relid[2] = (Int_t)TMath::Ceil( id / GetNPhi() ) ; | |
180 | relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNPhi() ) ; | |
d15a28e7 | 181 | } |
182 | return rv ; | |
183 | } | |
52a36ffd | 184 | |
9f616d61 | 185 | //____________________________________________________________________________ |
186 | void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) | |
187 | { | |
188 | // calculates the angular coverage in theta and phi of a EMC module | |
189 | ||
190 | Double_t conv ; | |
cf0c2bc1 | 191 | if ( opt == Radian() ) |
9f616d61 | 192 | conv = 1. ; |
cf0c2bc1 | 193 | else if ( opt == Degre() ) |
9f616d61 | 194 | conv = 180. / TMath::Pi() ; |
195 | else { | |
196 | cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ; | |
197 | conv = 1. ; | |
198 | } | |
199 | ||
200 | Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ; | |
92862013 | 201 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() |
9f616d61 | 202 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; |
203 | ||
92862013 | 204 | Double_t angle = TMath::ATan( GetCrystalSize(0)*GetNPhi() / (2 * y0) ) ; |
9f616d61 | 205 | phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 230 and 310 deg.) |
92862013 | 206 | Double_t max = phi - angle ; |
207 | Double_t min = phi + angle ; | |
208 | pM = TMath::Max(max, min) * conv ; | |
209 | pm = TMath::Min(max, min) * conv ; | |
9f616d61 | 210 | |
92862013 | 211 | angle = TMath::ATan( GetCrystalSize(2)*GetNZ() / (2 * y0) ) ; |
212 | max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.) | |
213 | min = TMath::Pi() / 2. - angle ; | |
214 | tM = TMath::Max(max, min) * conv ; | |
215 | tm = TMath::Min(max, min) * conv ; | |
9f616d61 | 216 | |
217 | } | |
218 | ||
219 | //____________________________________________________________________________ | |
220 | void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) | |
221 | { | |
222 | // calculates the angular coverage in theta and phi of a single crystal in a EMC module | |
223 | ||
224 | Double_t conv ; | |
cf0c2bc1 | 225 | if ( opt == Radian() ) |
9f616d61 | 226 | conv = 1. ; |
cf0c2bc1 | 227 | else if ( opt == Degre() ) |
9f616d61 | 228 | conv = 180. / TMath::Pi() ; |
229 | else { | |
230 | cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ; | |
231 | conv = 1. ; | |
232 | } | |
233 | ||
92862013 | 234 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() |
9f616d61 | 235 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; |
92862013 | 236 | theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ; |
237 | phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ; | |
9f616d61 | 238 | } |
239 | ||
240 | ||
241 | //____________________________________________________________________________ | |
52a36ffd | 242 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat) const |
d15a28e7 | 243 | { |
b2a60966 | 244 | // Calculates the ALICE global coordinates of a RecPoint and the error matrix |
245 | ||
d15a28e7 | 246 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 247 | TVector3 localposition ; |
d15a28e7 | 248 | |
249 | tmpPHOS->GetLocalPosition(gpos) ; | |
250 | ||
251 | ||
252 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
253 | { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() + | |
254 | GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ; | |
255 | ||
256 | } | |
257 | else | |
258 | { // it is a PPSD pad | |
259 | AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ; | |
260 | if (tmpPpsd->GetUp() ) // it is an upper module | |
261 | { | |
262 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - | |
263 | GetLeadToMicro2Gap() - GetLeadConverterThickness() - | |
264 | GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ; | |
265 | } | |
266 | else // it is a lower module | |
267 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ; | |
268 | } | |
269 | ||
92862013 | 270 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
271 | Double_t const kRADDEG = 180.0 / kPI ; | |
272 | Float_t rphi = phi / kRADDEG ; | |
d15a28e7 | 273 | |
92862013 | 274 | TRotation rot ; |
275 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 276 | |
92862013 | 277 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
278 | gpos.Transform(rot) ; // rotate the baby | |
6ad0bfa0 | 279 | |
d15a28e7 | 280 | } |
281 | ||
282 | //____________________________________________________________________________ | |
5cda30f6 | 283 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const |
d15a28e7 | 284 | { |
b2a60966 | 285 | // Calculates the ALICE global coordinates of a RecPoint |
286 | ||
d15a28e7 | 287 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 288 | TVector3 localposition ; |
d15a28e7 | 289 | tmpPHOS->GetLocalPosition(gpos) ; |
290 | ||
291 | ||
292 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
293 | { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() + | |
294 | GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ; | |
295 | } | |
296 | else | |
297 | { // it is a PPSD pad | |
298 | AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ; | |
299 | if (tmpPpsd->GetUp() ) // it is an upper module | |
300 | { | |
301 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - | |
302 | GetLeadToMicro2Gap() - GetLeadConverterThickness() - | |
303 | GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ; | |
304 | } | |
305 | else // it is a lower module | |
306 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ; | |
307 | } | |
308 | ||
92862013 | 309 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
310 | Double_t const kRADDEG = 180.0 / kPI ; | |
311 | Float_t rphi = phi / kRADDEG ; | |
d15a28e7 | 312 | |
92862013 | 313 | TRotation rot ; |
314 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 315 | |
92862013 | 316 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
317 | gpos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 318 | } |
319 | ||
320 | //____________________________________________________________________________ | |
52a36ffd | 321 | void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x) |
d15a28e7 | 322 | { |
52a36ffd | 323 | // calculates the impact coordinates of a neutral particle |
324 | // emitted in direction theta and phi in ALICE | |
d15a28e7 | 325 | |
52a36ffd | 326 | // searches for the PHOS EMC module |
327 | ModuleNumber = 0 ; | |
328 | Double_t tm, tM, pm, pM ; | |
329 | Int_t index = 1 ; | |
330 | while ( ModuleNumber == 0 && index <= GetNModules() ) { | |
331 | EmcModuleCoverage(index, tm, tM, pm, pM) ; | |
332 | if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) ) | |
333 | ModuleNumber = index ; | |
334 | index++ ; | |
d15a28e7 | 335 | } |
52a36ffd | 336 | if ( ModuleNumber != 0 ) { |
337 | Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ; | |
338 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() | |
339 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; | |
340 | Double_t angle = phi - phi0; | |
341 | x = y0 * TMath::Tan(angle) ; | |
342 | angle = theta - TMath::Pi() / 2 ; | |
343 | z = y0 * TMath::Tan(angle) ; | |
d15a28e7 | 344 | } |
d15a28e7 | 345 | } |
346 | ||
347 | //____________________________________________________________________________ | |
92862013 | 348 | Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) |
d15a28e7 | 349 | { |
b2a60966 | 350 | // Converts the relative numbering into the absolute numbering |
52a36ffd | 351 | // AbsId = 1 to fNModules * fNPhi * fNZ -> PbWO4 |
352 | // AbsId = N(total PHOS crystals) + | |
353 | // 1 to fNModules * 2 * (fNumberOfModulesPhi * fNumberOfModulesZ) * fNumberOfPadsPhi * fNumberOfPadsZ -> PPSD | |
354 | // AbsId = N(total PHOS crystals) + | |
355 | // 1:fNModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ -> CPV | |
d15a28e7 | 356 | |
357 | Bool_t rv = kTRUE ; | |
358 | ||
52a36ffd | 359 | if ( relid[1] > 0 ) { // it is a PPSD pad |
360 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from PPSD pads | |
92862013 | 361 | + ( relid[0] - 1 ) * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PHOS modules |
d15a28e7 | 362 | * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2 |
92862013 | 363 | + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules |
364 | + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row | |
52a36ffd | 365 | + relid[3] ; // the column number |
d15a28e7 | 366 | } |
52a36ffd | 367 | |
368 | else if ( relid[1] == 0 ) { // it is a Phos crystal | |
369 | AbsId = | |
370 | ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules | |
371 | + ( relid[2] - 1 ) * GetNPhi() // the offset of a xtal row | |
372 | + relid[3] ; // the column number | |
d15a28e7 | 373 | } |
374 | ||
52a36ffd | 375 | else if ( relid[1] == -1 ) { // it is a CPV pad |
376 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads | |
377 | + ( relid[0] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PHOS modules | |
378 | + ( relid[2] - 1 ) * GetNumberOfPadsZ() // the pads offset of a CPV row | |
379 | + relid[3] ; // the column number | |
380 | } | |
381 | ||
d15a28e7 | 382 | return rv ; |
383 | } | |
384 | ||
385 | //____________________________________________________________________________ | |
386 | ||
92862013 | 387 | void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos ) |
d15a28e7 | 388 | { |
b2a60966 | 389 | // Converts the absolute numbering into the global ALICE coordinates |
390 | ||
92862013 | 391 | if (id > 0) { |
d15a28e7 | 392 | |
92862013 | 393 | Int_t relid[4] ; |
d15a28e7 | 394 | |
92862013 | 395 | AbsToRelNumbering(id , relid) ; |
d15a28e7 | 396 | |
92862013 | 397 | Int_t phosmodule = relid[0] ; |
d15a28e7 | 398 | |
92862013 | 399 | Float_t y0 = 0 ; |
9f616d61 | 400 | |
92862013 | 401 | if ( relid[1] == 0 ) // it is a PbW04 crystal |
402 | { y0 = -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() | |
9f616d61 | 403 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ; |
d15a28e7 | 404 | } |
92862013 | 405 | if ( relid[1] > 0 ) { // its a PPSD pad |
406 | if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) // its an bottom module | |
d15a28e7 | 407 | { |
92862013 | 408 | y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ; |
d15a28e7 | 409 | } |
410 | else // its an upper module | |
92862013 | 411 | y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - GetLeadToMicro2Gap() |
9f616d61 | 412 | - GetLeadConverterThickness() - GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0) ; |
d15a28e7 | 413 | } |
414 | ||
415 | Float_t x, z ; | |
92862013 | 416 | RelPosInModule(relid, x, z) ; |
d15a28e7 | 417 | |
9f616d61 | 418 | pos.SetX(x) ; |
419 | pos.SetZ(z) ; | |
92862013 | 420 | pos.SetY( TMath::Sqrt(x*x + z*z + y0*y0) ) ; |
9f616d61 | 421 | |
d15a28e7 | 422 | |
423 | ||
92862013 | 424 | Float_t phi = GetPHOSAngle( phosmodule) ; |
425 | Double_t const kRADDEG = 180.0 / kPI ; | |
426 | Float_t rphi = phi / kRADDEG ; | |
d15a28e7 | 427 | |
92862013 | 428 | TRotation rot ; |
429 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 430 | |
92862013 | 431 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
d15a28e7 | 432 | |
92862013 | 433 | pos.Transform(rot) ; // rotate the baby |
d15a28e7 | 434 | } |
435 | else { | |
436 | pos.SetX(0.); | |
437 | pos.SetY(0.); | |
438 | pos.SetZ(0.); | |
439 | } | |
440 | } | |
441 | ||
442 | //____________________________________________________________________________ | |
92862013 | 443 | void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) |
d15a28e7 | 444 | { |
b2a60966 | 445 | // Converts the relative numbering into the local PHOS-module (x, z) coordinates |
52a36ffd | 446 | // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000) |
b2a60966 | 447 | |
92862013 | 448 | Int_t ppsdmodule ; |
52a36ffd | 449 | Int_t row = relid[2] ; //offset along x axiz |
450 | Int_t column = relid[3] ; //offset along z axiz | |
d15a28e7 | 451 | |
52a36ffd | 452 | Float_t padsizeZ = GetPadSizeZ(); |
453 | Float_t padsizeX = GetPadSizePhi(); | |
d15a28e7 | 454 | |
92862013 | 455 | if ( relid[1] == 0 ) { // its a PbW04 crystal |
52a36ffd | 456 | x = - ( GetNPhi()/2. - row + 0.5 ) * GetCrystalSize(0) ; // position ox Xtal with respect |
457 | z = ( GetNZ() /2. - column + 0.5 ) * GetCrystalSize(2) ; // of center of PHOS module | |
458 | } | |
459 | else { | |
92862013 | 460 | if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) |
52a36ffd | 461 | ppsdmodule = relid[1]-GetNumberOfModulesPhi() * GetNumberOfModulesZ(); |
462 | else | |
463 | ppsdmodule = relid[1] ; | |
92862013 | 464 | Int_t modrow = 1+(Int_t)TMath::Ceil( (Float_t)ppsdmodule / GetNumberOfModulesPhi()-1. ) ; |
465 | Int_t modcol = ppsdmodule - ( modrow - 1 ) * GetNumberOfModulesPhi() ; | |
466 | Float_t x0 = ( GetNumberOfModulesPhi() / 2. - modrow + 0.5 ) * GetPPSDModuleSize(0) ; | |
52a36ffd | 467 | Float_t z0 = ( GetNumberOfModulesZ() / 2. - modcol + 0.5 ) * GetPPSDModuleSize(2) ; |
468 | x = - ( GetNumberOfPadsPhi()/2. - row - 0.5 ) * padsizeX + x0 ; // position of pad with respect | |
469 | z = ( GetNumberOfPadsZ() /2. - column - 0.5 ) * padsizeZ - z0 ; // of center of PHOS module | |
470 | } | |
2f3366b6 | 471 | } |