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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 | ||
16 | /* $Id$ */ | |
17 | ||
18 | //_________________________________________________________________________ | |
19 | // Geometry class for PHOS : singleton | |
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. | |
26 | // | |
27 | // -- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (RRC "KI" & SUBATECH) | |
28 | ||
29 | // --- ROOT system --- | |
30 | ||
31 | #include "TVector3.h" | |
32 | #include "TRotation.h" | |
33 | #include "TParticle.h" | |
34 | #include <TGeoManager.h> | |
35 | #include <TGeoMatrix.h> | |
36 | ||
37 | // --- Standard library --- | |
38 | ||
39 | // --- AliRoot header files --- | |
40 | #include "AliLog.h" | |
41 | #include "AliPHOSGeometry.h" | |
42 | #include "AliPHOSEMCAGeometry.h" | |
43 | #include "AliPHOSRecPoint.h" | |
44 | ||
45 | ClassImp(AliPHOSGeometry) | |
46 | ||
47 | // these initialisations are needed for a singleton | |
48 | AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ; | |
49 | Bool_t AliPHOSGeometry::fgInit = kFALSE ; | |
50 | ||
51 | //____________________________________________________________________________ | |
52 | AliPHOSGeometry::AliPHOSGeometry() : | |
53 | AliPHOSGeoUtils(), | |
54 | fAngle(0.f), | |
55 | fPHOSAngle(0), | |
56 | fIPtoUpperCPVsurface(0), | |
57 | fCrystalShift(0), | |
58 | fCryCellShift(0), | |
59 | fRotMatrixArray(0) | |
60 | { | |
61 | // default ctor | |
62 | // must be kept public for root persistency purposes, but should never be called by the outside world | |
63 | fgGeom = 0 ; | |
64 | } | |
65 | ||
66 | //____________________________________________________________________________ | |
67 | AliPHOSGeometry::AliPHOSGeometry(const AliPHOSGeometry & rhs) | |
68 | : AliPHOSGeoUtils(rhs), | |
69 | fAngle(rhs.fAngle), | |
70 | fPHOSAngle(0), | |
71 | fIPtoUpperCPVsurface(rhs.fIPtoUpperCPVsurface), | |
72 | fCrystalShift(rhs.fCrystalShift), | |
73 | fCryCellShift(rhs.fCryCellShift), | |
74 | fRotMatrixArray(0) | |
75 | { | |
76 | Fatal("cpy ctor", "not implemented") ; | |
77 | } | |
78 | ||
79 | //____________________________________________________________________________ | |
80 | AliPHOSGeometry::AliPHOSGeometry(const Text_t* name, const Text_t* title) | |
81 | : AliPHOSGeoUtils(name, title), | |
82 | fAngle(0.f), | |
83 | fPHOSAngle(0), | |
84 | fIPtoUpperCPVsurface(0), | |
85 | fCrystalShift(0), | |
86 | fCryCellShift(0), | |
87 | fRotMatrixArray(0) | |
88 | { | |
89 | // ctor only for internal usage (singleton) | |
90 | Init() ; | |
91 | fgGeom = this; | |
92 | } | |
93 | ||
94 | //____________________________________________________________________________ | |
95 | AliPHOSGeometry::~AliPHOSGeometry(void) | |
96 | { | |
97 | // dtor | |
98 | ||
99 | if (fRotMatrixArray) fRotMatrixArray->Delete() ; | |
100 | if (fRotMatrixArray) delete fRotMatrixArray ; | |
101 | if (fPHOSAngle ) delete[] fPHOSAngle ; | |
102 | } | |
103 | ||
104 | //____________________________________________________________________________ | |
105 | void AliPHOSGeometry::Init(void) | |
106 | { | |
107 | // Initializes the PHOS parameters : | |
108 | // IHEP is the Protvino CPV (cathode pad chambers) | |
109 | ||
110 | fgInit = kTRUE ; | |
111 | ||
112 | fAngle = 20; | |
113 | ||
114 | ||
115 | fPHOSAngle = new Float_t[fNModules] ; | |
116 | ||
117 | const Float_t * emcParams = fGeometryEMCA->GetEMCParams() ; | |
118 | ||
119 | fPHOSParams[0] = TMath::Max((Double_t)fGeometryCPV->GetCPVBoxSize(0)/2., | |
120 | (Double_t)(emcParams[0] - (emcParams[1]-emcParams[0])* | |
121 | fGeometryCPV->GetCPVBoxSize(1)/2/emcParams[3])); | |
122 | fPHOSParams[1] = emcParams[1] ; | |
123 | fPHOSParams[2] = TMath::Max((Double_t)emcParams[2], (Double_t)fGeometryCPV->GetCPVBoxSize(2)/2.); | |
124 | fPHOSParams[3] = emcParams[3] + fGeometryCPV->GetCPVBoxSize(1)/2. ; | |
125 | ||
126 | fIPtoUpperCPVsurface = fGeometryEMCA->GetIPtoOuterCoverDistance() - fGeometryCPV->GetCPVBoxSize(1) ; | |
127 | ||
128 | //calculate offset to crystal surface | |
129 | const Float_t * inthermo = fGeometryEMCA->GetInnerThermoHalfSize() ; | |
130 | const Float_t * strip = fGeometryEMCA->GetStripHalfSize() ; | |
131 | const Float_t * splate = fGeometryEMCA->GetSupportPlateHalfSize(); | |
132 | const Float_t * crystal = fGeometryEMCA->GetCrystalHalfSize() ; | |
133 | const Float_t * pin = fGeometryEMCA->GetAPDHalfSize() ; | |
134 | const Float_t * preamp = fGeometryEMCA->GetPreampHalfSize() ; | |
135 | fCrystalShift=-inthermo[1]+strip[1]+splate[1]+crystal[1]-fGeometryEMCA->GetAirGapLed()/2.+pin[1]+preamp[1] ; | |
136 | fCryCellShift=crystal[1]-(fGeometryEMCA->GetAirGapLed()-2*pin[1]-2*preamp[1])/2; | |
137 | ||
138 | Int_t index ; | |
139 | for ( index = 0; index < fNModules; index++ ) | |
140 | fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry() | |
141 | ||
142 | fRotMatrixArray = new TObjArray(fNModules) ; | |
143 | ||
144 | // Geometry parameters are calculated | |
145 | ||
146 | SetPHOSAngles(); | |
147 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; | |
148 | Float_t r = GetIPtoOuterCoverDistance() + fPHOSParams[3] - GetCPVBoxSize(1) ; | |
149 | for (Int_t iModule=0; iModule<fNModules; iModule++) { | |
150 | fModuleCenter[iModule][0] = r * TMath::Sin(fPHOSAngle[iModule] / kRADDEG ); | |
151 | fModuleCenter[iModule][1] =-r * TMath::Cos(fPHOSAngle[iModule] / kRADDEG ); | |
152 | fModuleCenter[iModule][2] = 0.; | |
153 | ||
154 | fModuleAngle[iModule][0][0] = 90; | |
155 | fModuleAngle[iModule][0][1] = fPHOSAngle[iModule]; | |
156 | fModuleAngle[iModule][1][0] = 0; | |
157 | fModuleAngle[iModule][1][1] = 0; | |
158 | fModuleAngle[iModule][2][0] = 90; | |
159 | fModuleAngle[iModule][2][1] = 270 + fPHOSAngle[iModule]; | |
160 | } | |
161 | ||
162 | } | |
163 | ||
164 | //____________________________________________________________________________ | |
165 | AliPHOSGeometry * AliPHOSGeometry::GetInstance() | |
166 | { | |
167 | // Returns the pointer of the unique instance; singleton specific | |
168 | ||
169 | return static_cast<AliPHOSGeometry *>( fgGeom ) ; | |
170 | } | |
171 | ||
172 | //____________________________________________________________________________ | |
173 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) | |
174 | { | |
175 | // Returns the pointer of the unique instance | |
176 | // Creates it with the specified options (name, title) if it does not exist yet | |
177 | ||
178 | AliPHOSGeometry * rv = 0 ; | |
179 | if ( fgGeom == 0 ) { | |
180 | if ( strcmp(name,"") == 0 ) | |
181 | rv = 0 ; | |
182 | else { | |
183 | fgGeom = new AliPHOSGeometry(name, title) ; | |
184 | if ( fgInit ) | |
185 | rv = (AliPHOSGeometry * ) fgGeom ; | |
186 | else { | |
187 | rv = 0 ; | |
188 | delete fgGeom ; | |
189 | fgGeom = 0 ; | |
190 | } | |
191 | } | |
192 | } | |
193 | else { | |
194 | if ( strcmp(fgGeom->GetName(), name) != 0 ) | |
195 | ::Error("GetInstance", "Current geometry is %s. You cannot call %s", | |
196 | fgGeom->GetName(), name) ; | |
197 | else | |
198 | rv = (AliPHOSGeometry *) fgGeom ; | |
199 | } | |
200 | return rv ; | |
201 | } | |
202 | ||
203 | //____________________________________________________________________________ | |
204 | void AliPHOSGeometry::SetPHOSAngles() | |
205 | { | |
206 | // Calculates the position of the PHOS modules in ALICE global coordinate system | |
207 | // in ideal geometry | |
208 | ||
209 | Double_t const kRADDEG = 180.0 / TMath::Pi() ; | |
210 | Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoUpperCPVsurface() ) ) ; | |
211 | pphi *= kRADDEG ; | |
212 | if (pphi > fAngle){ | |
213 | AliError(Form("PHOS modules overlap!\n pphi = %f fAngle = %f", | |
214 | pphi, fAngle)); | |
215 | ||
216 | } | |
217 | pphi = fAngle; | |
218 | ||
219 | for( Int_t i = 1; i <= fNModules ; i++ ) { | |
220 | Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ; | |
221 | fPHOSAngle[i-1] = - angle ; | |
222 | } | |
223 | } | |
224 | //____________________________________________________________________________ | |
225 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* , TVector3 & ) const | |
226 | { | |
227 | AliFatal(Form("Please use GetGlobalPHOS(recPoint,gpos) instead of GetGlobal!")); | |
228 | } | |
229 | ||
230 | //____________________________________________________________________________ | |
231 | void AliPHOSGeometry::GetGlobalPHOS(const AliPHOSRecPoint* recPoint, TVector3 & gpos) const | |
232 | { | |
233 | // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system | |
234 | ||
235 | const AliPHOSRecPoint * tmpPHOS = recPoint ; | |
236 | TVector3 localposition ; | |
237 | ||
238 | tmpPHOS->GetLocalPosition(gpos) ; | |
239 | ||
240 | if (!gGeoManager){ | |
241 | AliFatal("Geo manager not initialized\n"); | |
242 | } | |
243 | //construct module name | |
244 | char path[100] ; | |
245 | Double_t dy ; | |
246 | if(tmpPHOS->IsEmc()){ | |
247 | sprintf(path,"/ALIC_1/PHOS_%d/PEMC_1/PCOL_1/PTIO_1/PCOR_1/PAGA_1/PTII_1",tmpPHOS->GetPHOSMod()) ; | |
248 | // sprintf(path,"/ALIC_1/PHOS_%d",tmpPHOS->GetPHOSMod()) ; | |
249 | dy=fCrystalShift ; | |
250 | } | |
251 | else{ | |
252 | sprintf(path,"/ALIC_1/PHOS_%d/PCPV_1",tmpPHOS->GetPHOSMod()) ; | |
253 | dy= GetCPVBoxSize(1)/2. ; //center of CPV module | |
254 | } | |
255 | Double_t pos[3]={gpos.X(),gpos.Y()-dy,gpos.Z()} ; | |
256 | if(tmpPHOS->IsEmc()) | |
257 | pos[2]=-pos[2] ; //Opposite z directions in EMC matrix and local frame!!! | |
258 | Double_t posC[3]; | |
259 | //now apply possible shifts and rotations | |
260 | if (!gGeoManager->cd(path)){ | |
261 | AliFatal("Geo manager can not find path \n"); | |
262 | } | |
263 | TGeoHMatrix *m = gGeoManager->GetCurrentMatrix(); | |
264 | if (m){ | |
265 | m->LocalToMaster(pos,posC); | |
266 | } | |
267 | else{ | |
268 | AliFatal("Geo matrixes are not loaded \n") ; | |
269 | } | |
270 | gpos.SetXYZ(posC[0],posC[1],posC[2]) ; | |
271 | ||
272 | } | |
273 | //____________________________________________________________________________ | |
274 | ||
275 | void AliPHOSGeometry::GetModuleCenter(TVector3& center, | |
276 | const char *det, | |
277 | Int_t module) const | |
278 | { | |
279 | // Returns a position of the center of the CPV or EMC module | |
280 | // in ideal (not misaligned) geometry | |
281 | Float_t rDet = 0.; | |
282 | if (strcmp(det,"CPV") == 0) rDet = GetIPtoCPVDistance (); | |
283 | else if (strcmp(det,"EMC") == 0) rDet = GetIPtoCrystalSurface(); | |
284 | else | |
285 | AliFatal(Form("Wrong detector name %s",det)); | |
286 | ||
287 | Float_t angle = GetPHOSAngle(module); // (40,20,0,-20,-40) degrees | |
288 | angle *= TMath::Pi()/180; | |
289 | angle += 3*TMath::Pi()/2.; | |
290 | center.SetXYZ(rDet*TMath::Cos(angle), rDet*TMath::Sin(angle), 0.); | |
291 | } | |
292 |