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2012850d | 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 EMCAL : singleton | |
b13bbe81 | 20 | // EMCAL consists of layers of scintillator and lead |
ffa6d63b | 21 | // Places the the Barrel Geometry of The EMCAL at Midrapidity |
22 | // between 0 and 120 degrees of Phi and | |
23 | // -0.7 to 0.7 in eta | |
24 | // Number of Modules and Layers may be controlled by | |
25 | // the name of the instance defined | |
26 | // EMCALArch2x has more modules along both phi and eta | |
27 | // EMCALArchxa has less Layers in the Radial Direction | |
b13bbe81 | 28 | //*-- Author: Sahal Yacoob (LBL / UCT) |
29 | // and : Yves Schutz (SUBATECH) | |
30 | // and : Jennifer Klay (LBL) | |
2012850d | 31 | |
32 | // --- ROOT system --- | |
33 | ||
34 | // --- Standard library --- | |
bba4716c | 35 | #include <stdlib.h> |
2012850d | 36 | |
37 | // --- AliRoot header files --- | |
116cbefd | 38 | #include <TError.h> |
ca8f5bd0 | 39 | #include <TMath.h> |
116cbefd | 40 | #include <TVector3.h> |
173558f2 | 41 | |
ca8f5bd0 | 42 | // -- ALICE Headers. |
2012850d | 43 | #include "AliConst.h" |
173558f2 | 44 | |
ca8f5bd0 | 45 | // --- EMCAL headers |
46 | #include "AliEMCALGeometry.h" | |
2012850d | 47 | |
b13bbe81 | 48 | ClassImp(AliEMCALGeometry); |
2012850d | 49 | |
b13bbe81 | 50 | AliEMCALGeometry *AliEMCALGeometry::fgGeom = 0; |
51 | Bool_t AliEMCALGeometry::fgInit = kFALSE; | |
2012850d | 52 | |
b13bbe81 | 53 | //______________________________________________________________________ |
54 | AliEMCALGeometry::~AliEMCALGeometry(void){ | |
55 | // dtor | |
2012850d | 56 | } |
b13bbe81 | 57 | |
395c7ba2 | 58 | //______________________________________________________________________ |
59 | const Bool_t AliEMCALGeometry::AreInSameTower(Int_t id1, Int_t id2) const { | |
60 | Int_t idmax = TMath::Max(id1, id2) ; | |
61 | Int_t idmin = TMath::Min(id1, id2) ; | |
62 | if ( ((idmax - GetNZ() * GetNPhi()) == idmin ) || | |
63 | ((idmax - 2 * GetNZ() * GetNPhi()) == idmin ) ) | |
64 | return kTRUE ; | |
65 | else | |
66 | return kFALSE ; | |
67 | } | |
05a92d59 | 68 | |
395c7ba2 | 69 | //______________________________________________________________________ |
70 | void AliEMCALGeometry::Init(void){ | |
71 | // Initializes the EMCAL parameters | |
72 | // naming convention : GUV_L_WX_N_YZ_M gives the composition of a tower | |
73 | // UV inform about the compsition of the pre-shower section: | |
74 | // thickness in mm of Pb radiator (U) and of scintillator (V), and number of scintillator layers (L) | |
75 | // WX inform about the composition of the EM calorimeter section: | |
76 | // thickness in mm of Pb radiator (W) and of scintillator (X), and number of scintillator layers (N) | |
77 | // YZ inform about the composition of the hadron calorimeter section: | |
78 | // thickness in mm of Cu radiator (Y) and of scintillator (Z), and number of scintillator layers (M) | |
79 | // Valid geometries are G56_2_55_19_104_14 | |
80 | // G56_2_55_19 or EMCAL_5655_21 | |
81 | // G65_2_64_19 or EMCAL_6564_21 | |
82 | ||
83 | fgInit = kFALSE; // Assume failer untill proven otherwise. | |
84 | TString name(GetName()) ; | |
85 | ||
86 | if ( name == "G56_2_55_19_104_14" ) { | |
87 | fPRPbRadThickness = 0.5; // cm, Thickness of the Pb radiators for the preshower section | |
88 | fPRScintThick = 0.6; // cm, Thickness of the sintilator for the preshower section of the tower | |
89 | fNPRLayers = 2; // number of scintillator layers in the preshower section | |
90 | ||
91 | fECPbRadThickness = 0.5; // cm, Thickness of the Pb radiators for the EM calorimeter section | |
92 | fECScintThick = 0.5; // cm, Thickness of the sintilator for the EM alorimeter section of the tower | |
93 | fNECLayers = 19; // number of scintillator layers in the EM calorimeter section | |
94 | ||
95 | fHCCuRadThickness = 1.0; // cm, Thickness of the Cu radiators. | |
96 | fHCScintThick = 0.4; // cm, Thickness of the sintilator for the hadronic alorimeter section of the tower | |
97 | fNHCLayers = 14; // number of scintillator layers in the hadronic calorimeter section | |
98 | ||
444f2901 | 99 | fSampling = 11.3 ; |
395c7ba2 | 100 | fSummationFraction = 0.8 ; |
101 | ||
102 | fAlFrontThick = 3.0; // cm, Thickness of front Al layer | |
103 | fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator | |
104 | } | |
105 | else if ( name == "G56_2_55_19" || name == "EMCAL_5655_21" ) { | |
106 | fPRPbRadThickness = 0.5; // cm, Thickness of the Pb radiators for the preshower section | |
107 | fPRScintThick = 0.6; // cm, Thickness of the sintilator for the preshower section of the tower | |
108 | fNPRLayers = 2; // number of scintillator layers in the preshower section | |
109 | ||
110 | fECPbRadThickness = 0.5; // cm, Thickness of the Pb radiators for the EM calorimeter section | |
111 | fECScintThick = 0.5; // cm, Thickness of the sintilator for the EM alorimeter section of the tower | |
112 | fNECLayers = 19; // number of scintillator layers in the EM calorimeter section | |
113 | ||
114 | fHCCuRadThickness = 0.0; // cm, Thickness of the Cu radiators. | |
115 | fHCScintThick = 0.0; // cm, Thickness of the sintilator for the hadronic alorimeter section of the tower | |
116 | fNHCLayers = 0; // number of scintillator layers in the hadronic calorimeter section | |
117 | ||
1f9dd834 | 118 | fSampling = 11.3 ; |
395c7ba2 | 119 | fSummationFraction = 0.8 ; |
120 | ||
121 | fAlFrontThick = 3.0; // cm, Thickness of front Al layer | |
122 | fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator | |
123 | } | |
124 | else if ( name == "G65_2_64_19" || name == "EMCAL_6564_21" ) { | |
125 | fPRPbRadThickness = 0.6; // cm, Thickness of the Pb radiators for the preshower section | |
126 | fPRScintThick = 0.5; // cm, Thickness of the sintilator for the preshower section of the tower | |
127 | fNPRLayers = 2; // number of scintillator layers in the preshower section | |
128 | ||
129 | fECPbRadThickness = 0.6; // cm, Thickness of the Pb radiators for the EM calorimeter section | |
130 | fECScintThick = 0.4; // cm, Thickness of the sintilator for the EM alorimeter section of the tower | |
131 | fNECLayers = 19; // number of scintillator layers in the EM calorimeter section | |
132 | ||
133 | fHCCuRadThickness = 0.0; // cm, Thickness of the Cu radiators. | |
134 | fHCScintThick = 0.0; // cm, Thickness of the sintilator for the hadronic alorimeter section of the tower | |
135 | fNHCLayers = 0; // number of scintillator layers in the hadronic calorimeter section | |
136 | ||
1f9dd834 | 137 | fSampling = 16. ; |
395c7ba2 | 138 | fSummationFraction = 0.8 ; |
139 | ||
140 | fAlFrontThick = 3.0; // cm, Thickness of front Al layer | |
141 | fGap2Active = 1.0; // cm, Gap between Al and 1st Scintillator | |
142 | } | |
143 | else | |
144 | Fatal("Init", "%s is an undefined geometry!", name.Data()) ; | |
05a92d59 | 145 | |
395c7ba2 | 146 | // if( name != "EMCALArch1a" && |
147 | // name != "EMCALArch1b" && | |
148 | // name != "EMCALArch2a" && | |
149 | // name != "EMCALArch2b" && | |
150 | // name != "EMCALArch1aN" ){ | |
151 | // Fatal("Init", "%s is not a known geometry (choose among EMCALArch1a, EMCALArch1b, EMCALArch2a and EMCALArch2b, EMCALArch1aN)", name.Data()) ; | |
152 | // } // end if | |
153 | // // | |
154 | // if ( name == "EMCALArch1a" || | |
155 | // name == "EMCALArch1b" || | |
156 | // name == "EMCALArch1aN") { | |
157 | // fNZ = 96; | |
158 | // fNPhi = 144; | |
159 | // } // end if | |
160 | // if ( name == "EMCALArch2a" || | |
161 | // name == "EMCALArch2b" ) { | |
162 | // fNZ = 112; | |
163 | // fNPhi = 168; | |
164 | // } // end if | |
165 | // if ( name == "EMCALArch1a" || | |
166 | // name == "EMCALArch2a" ) { | |
167 | // fNPRLayers = 2; | |
168 | // fNECLayers = 19; | |
169 | // fNHCLayers = 0; | |
170 | // } // end if | |
171 | // if ( name == "EMCALArch1b" || | |
172 | // name == "EMCALArch2b" ) { | |
173 | // fNPRLayers = 2; | |
174 | // fNECLayers = 23; | |
175 | // fNHCLayers = 0; | |
176 | // } // end if | |
177 | // if ( name == "EMCALArch1aN") { | |
178 | // fNPRLayers = 2; | |
179 | // fNECLayers = 19; | |
180 | // fNHCLayers = 14; | |
181 | // } | |
182 | ||
183 | // geometry | |
184 | fNZ = 96; // granularity along Z (eta) | |
185 | fNPhi = 144; // granularity in phi (azimuth) | |
186 | fArm1PhiMin = 60.0; // degrees, Starting EMCAL Phi position | |
187 | fArm1PhiMax = 180.0; // degrees, Ending EMCAL Phi position | |
188 | fArm1EtaMin = -0.7; // pseudorapidity, Starting EMCAL Eta position | |
189 | fArm1EtaMax = +0.7; // pseudorapidity, Ending EMCAL Eta position | |
190 | ||
191 | fIPDistance = 454.0; // cm, Radial distance to inner surface of EMCAL | |
192 | fShellThickness = fAlFrontThick + fGap2Active + 2.*(GetPRScintThick() + GetPRPbRadThick()) + // pre shower | |
193 | (fNECLayers-1)*(GetECScintThick()+ GetECPbRadThick()) + // E cal -1 because the last element is a scintillator | |
194 | fNHCLayers*(GetHCScintThick()+ GetHCCuRadThick()) + // H cal | |
195 | GetHCScintThick() ; // last scintillator | |
196 | fZLength = 2.*ZFromEtaR(fIPDistance+fShellThickness,fArm1EtaMax); // Z coverage | |
197 | fEnvelop[0] = fIPDistance; // mother volume inner radius | |
198 | fEnvelop[1] = fIPDistance + fShellThickness; // mother volume outer r. | |
199 | fEnvelop[2] = 1.00001*fZLength; // add some padding for mother volume. | |
200 | ||
201 | fgInit = kTRUE; | |
202 | ||
203 | Info("Init", "geometry of EMCAL named %s is as follows:", name.Data()); | |
204 | printf( "Tower geometry pre-shower: %d x (%f mm Pb, %f mm Sc) \n", GetNPRLayers(), GetPRPbRadThick(), GetPRScintThick() ) ; | |
205 | printf( " ECAL : %d x (%f mm Pb, %f mm Sc) \n", GetNECLayers(), GetECPbRadThick(), GetECScintThick() ) ; | |
206 | if ( GetNHCLayers() > 0 ) | |
207 | printf( " HCAL : %d x (%f mm Pb, %f mm Sc) \n", GetNHCLayers(), GetHCCuRadThick(), GetHCScintThick() ) ; | |
208 | printf("Granularity: %d in eta and %d in phi\n", GetNZ(), GetNPhi()) ; | |
209 | printf("Layout: phi = (%f, %f), eta = (%f, %f), y = %f\n", | |
210 | GetArm1PhiMin(), GetArm1PhiMax(),GetArm1EtaMin(), GetArm1EtaMax(), GetIPDistance() ) ; | |
2012850d | 211 | } |
173558f2 | 212 | |
b13bbe81 | 213 | //______________________________________________________________________ |
214 | AliEMCALGeometry * AliEMCALGeometry::GetInstance(){ | |
05a92d59 | 215 | // Returns the pointer of the unique instance |
216 | ||
217 | return static_cast<AliEMCALGeometry *>( fgGeom ) ; | |
2012850d | 218 | } |
173558f2 | 219 | |
b13bbe81 | 220 | //______________________________________________________________________ |
221 | AliEMCALGeometry* AliEMCALGeometry::GetInstance(const Text_t* name, | |
222 | const Text_t* title){ | |
223 | // Returns the pointer of the unique instance | |
224 | ||
225 | AliEMCALGeometry * rv = 0; | |
226 | if ( fgGeom == 0 ) { | |
227 | if ( strcmp(name,"") == 0 ) rv = 0; | |
228 | else { | |
229 | fgGeom = new AliEMCALGeometry(name, title); | |
230 | if ( fgInit ) rv = (AliEMCALGeometry * ) fgGeom; | |
231 | else { | |
232 | rv = 0; | |
233 | delete fgGeom; | |
234 | fgGeom = 0; | |
235 | } // end if fgInit | |
236 | } // end if strcmp(name,"") | |
237 | }else{ | |
238 | if ( strcmp(fgGeom->GetName(), name) != 0 ) { | |
9859bfc0 | 239 | TString message("\n") ; |
240 | message += "current geometry is " ; | |
241 | message += fgGeom->GetName() ; | |
242 | message += "\n you cannot call " ; | |
243 | message += name ; | |
244 | ::Info("GetGeometry", message.Data() ) ; | |
b13bbe81 | 245 | }else{ |
9859bfc0 | 246 | rv = (AliEMCALGeometry *) fgGeom; |
b13bbe81 | 247 | } // end if |
248 | } // end if fgGeom | |
249 | return rv; | |
2012850d | 250 | } |
173558f2 | 251 | |
ca8f5bd0 | 252 | //______________________________________________________________________ |
395c7ba2 | 253 | Int_t AliEMCALGeometry::TowerIndex(Int_t ieta,Int_t iphi) const { |
254 | // Returns the tower index number from the based on the Z and Phi | |
255 | // index numbers. There are 2 times the number of towers to separate | |
256 | // out the full towers from the pre-showers. | |
257 | // Inputs: | |
258 | // Int_t ieta // index allong z axis [1-fNZ] | |
259 | // Int_t iphi // index allong phi axis [1-fNPhi] | |
260 | // Int_t where // 1 = PRE section, 0 = EC section, 2 = HC section | |
261 | // Outputs: | |
262 | // none. | |
263 | // Returned | |
264 | // Int_t index // Tower index number | |
265 | ||
266 | if ( (ieta <= 0 || ieta>GetNEta()) || | |
267 | (iphi <= 0 || iphi>GetNPhi())) | |
268 | Fatal("TowerIndex", "Unexpected parameters eta = %d phi = %d!", ieta, iphi) ; | |
269 | ||
270 | return ( (iphi - 1)*GetNEta() + ieta ); | |
ca8f5bd0 | 271 | } |
173558f2 | 272 | |
ca8f5bd0 | 273 | //______________________________________________________________________ |
e908f07f | 274 | void AliEMCALGeometry::TowerIndexes(Int_t index,Int_t &ieta,Int_t &iphi, |
a34b7b9f | 275 | Int_t &ipre) const { |
395c7ba2 | 276 | // Inputs: |
277 | // Int_t index // Tower index number [1-i*fNZ*fNPhi] PRE(i=1)/ECAL(i=2)/HCAL(i=3) | |
278 | // Outputs: | |
279 | // Int_t ieta // index allong z axis [1-fNZ] | |
280 | // Int_t iphi // index allong phi axis [1-fNPhi] | |
281 | // Int_t ipre // 0 = ECAL section, 1 = Pre-shower section, 2 = HCAL section | |
282 | // Returned | |
283 | // none. | |
284 | ||
285 | ||
286 | Int_t nindex = 0, itowers = GetNEta() * GetNPhi(); | |
287 | ||
288 | if ( IsInPRE(index) ) { // PRE index | |
289 | nindex = index - itowers; | |
290 | ipre = 1 ; | |
291 | } | |
292 | else if ( IsInECAL(index) ) { // ECAL index | |
293 | nindex = index ; | |
294 | ipre = 0 ; | |
295 | } | |
296 | else if ( IsInHCAL(index) ) { // HCAL index | |
297 | nindex = index - 2*itowers; | |
298 | ipre = 2 ; | |
299 | } | |
300 | else | |
301 | Fatal("TowerIndexes", "Unexpected Id number!") ; | |
302 | ||
303 | if (nindex%GetNZ()) | |
304 | iphi = nindex / GetNZ() + 1 ; | |
305 | else | |
306 | iphi = nindex / GetNZ() ; | |
307 | ieta = nindex - (iphi - 1) * GetNZ() ; | |
308 | ||
309 | if (gDebug==2) | |
310 | Info("TowerIndexes", "index=%d,%d, ieta=%d, iphi = %d", index, nindex,ieta, iphi) ; | |
311 | return; | |
312 | ||
ca8f5bd0 | 313 | } |
173558f2 | 314 | |
ca8f5bd0 | 315 | //______________________________________________________________________ |
a34b7b9f | 316 | void AliEMCALGeometry::EtaPhiFromIndex(Int_t index,Float_t &eta,Float_t &phi) const { |
ca8f5bd0 | 317 | // given the tower index number it returns the based on the eta and phi |
318 | // of the tower. | |
319 | // Inputs: | |
395c7ba2 | 320 | // Int_t index // Tower index number [1-i*fNZ*fNPhi] PRE(i=1)/ECAL(i=2)/HCAL(i=3) |
ca8f5bd0 | 321 | // Outputs: |
322 | // Float_t eta // eta of center of tower in pseudorapidity | |
323 | // Float_t phi // phi of center of tower in degrees | |
324 | // Returned | |
325 | // none. | |
395c7ba2 | 326 | Int_t ieta, iphi, ipre ; |
327 | Float_t deta, dphi ; | |
ca8f5bd0 | 328 | |
e908f07f | 329 | TowerIndexes(index,ieta,iphi,ipre); |
395c7ba2 | 330 | |
331 | if (gDebug == 2) | |
332 | Info("EtaPhiFromIndex","index = %d, ieta = %d, iphi = %d", index, ieta, iphi) ; | |
333 | ||
334 | deta = (GetArm1EtaMax()-GetArm1EtaMin())/(static_cast<Float_t>(GetNEta())); | |
335 | eta = GetArm1EtaMin() + ((static_cast<Float_t>(ieta) - 0.5 ))*deta; | |
336 | ||
337 | dphi = (GetArm1PhiMax() - GetArm1PhiMin())/(static_cast<Float_t>(GetNPhi())); // in degrees. | |
338 | phi = GetArm1PhiMin() + dphi*(static_cast<Float_t>(iphi) - 0.5);//iphi range [1-fNphi]. | |
ca8f5bd0 | 339 | } |
173558f2 | 340 | |
ca8f5bd0 | 341 | //______________________________________________________________________ |
a34b7b9f | 342 | Int_t AliEMCALGeometry::TowerIndexFromEtaPhi(Float_t eta,Float_t phi) const { |
ca8f5bd0 | 343 | // returns the tower index number based on the eta and phi of the tower. |
344 | // Inputs: | |
345 | // Float_t eta // eta of center of tower in pseudorapidity | |
346 | // Float_t phi // phi of center of tower in degrees | |
347 | // Outputs: | |
348 | // none. | |
349 | // Returned | |
350 | // Int_t index // Tower index number [1-fNZ*fNPhi] | |
395c7ba2 | 351 | |
e908f07f | 352 | Int_t ieta,iphi; |
ca8f5bd0 | 353 | |
395c7ba2 | 354 | ieta = static_cast<Int_t> ( 1 + (static_cast<Float_t>(GetNEta()) * (eta - GetArm1EtaMin()) / (GetArm1EtaMax() - GetArm1EtaMin())) ) ; |
355 | ||
356 | if( ieta <= 0 || ieta > GetNEta() ) { | |
357 | Error("TowerIndexFromEtaPhi", "Unexpected (eta, phi) = (%f, %f) value, outside of EMCAL!", eta, phi) ; | |
358 | return -1 ; | |
359 | } | |
360 | ||
361 | iphi = static_cast<Int_t> ( 1 + (static_cast<Float_t>(GetNPhi()) * (phi - GetArm1PhiMin()) / (GetArm1PhiMax() - GetArm1PhiMin())) ) ; | |
362 | ||
363 | if( iphi <= 0 || iphi > GetNPhi() ) { | |
364 | Error("TowerIndexFromEtaPhi", "Unexpected (eta, phi) = (%f, %f) value, outside of EMCAL!", eta, phi) ; | |
365 | return -1 ; | |
366 | } | |
367 | ||
368 | return TowerIndex(ieta,iphi); | |
ca8f5bd0 | 369 | } |
173558f2 | 370 | |
ca8f5bd0 | 371 | //______________________________________________________________________ |
a34b7b9f | 372 | Int_t AliEMCALGeometry::PreTowerIndexFromEtaPhi(Float_t eta,Float_t phi) const { |
ca8f5bd0 | 373 | // returns the pretower index number based on the eta and phi of the tower. |
374 | // Inputs: | |
375 | // Float_t eta // eta of center of tower in pseudorapidity | |
376 | // Float_t phi // phi of center of tower in degrees | |
377 | // Outputs: | |
378 | // none. | |
379 | // Returned | |
380 | // Int_t index // PreTower index number [fNZ*fNPhi-2*fNZ*fNPhi] | |
381 | ||
e908f07f | 382 | return GetNEta()*GetNPhi()+TowerIndexFromEtaPhi(eta,phi); |
ca8f5bd0 | 383 | } |
173558f2 | 384 | |
ca8f5bd0 | 385 | //______________________________________________________________________ |
a34b7b9f | 386 | Bool_t AliEMCALGeometry::AbsToRelNumbering(Int_t AbsId, Int_t *relid) const { |
ca8f5bd0 | 387 | // Converts the absolute numbering into the following array/ |
5a9318ff | 388 | // relid[0] = EMCAL Arm number 1:1 |
395c7ba2 | 389 | // relid[1] = 0 ECAL section ; = 1 PRE section; = 2 HCA section |
ca8f5bd0 | 390 | // relid[2] = Row number inside EMCAL |
391 | // relid[3] = Column number inside EMCAL | |
392 | // Input: | |
393 | // Int_t AbsId // Tower index number [1-2*fNZ*fNPhi] | |
394 | // Outputs: | |
395 | // Int_t *relid // array of 5. Discribed above. | |
396 | Bool_t rv = kTRUE ; | |
e908f07f | 397 | Int_t ieta=0,iphi=0,ipre=0,index=AbsId; |
ca8f5bd0 | 398 | |
e908f07f | 399 | TowerIndexes(index,ieta,iphi,ipre); |
ca8f5bd0 | 400 | relid[0] = 1; |
395c7ba2 | 401 | relid[1] = ipre; |
e908f07f | 402 | relid[2] = ieta; |
ca8f5bd0 | 403 | relid[3] = iphi; |
404 | ||
405 | return rv; | |
406 | } | |
173558f2 | 407 | |
ca8f5bd0 | 408 | //______________________________________________________________________ |
395c7ba2 | 409 | void AliEMCALGeometry::PosInAlice(const Int_t *relid, Float_t &theta, Float_t &phi) const |
410 | { | |
411 | // Converts the relative numbering into the local EMCAL-module (x, z) | |
412 | // coordinates | |
413 | Int_t sect = relid[1]; // PRE/ECAL/HCAL section 1/0/2 | |
414 | Int_t ieta = relid[2]; // offset along x axis | |
415 | Int_t iphi = relid[3]; // offset along z axis | |
416 | Int_t index; | |
417 | Float_t eta; | |
418 | ||
419 | index = TowerIndex(ieta,iphi); | |
420 | EtaPhiFromIndex(index,eta,phi); | |
421 | theta = 180.*(2.0*TMath::ATan(TMath::Exp(-eta)))/TMath::Pi(); | |
422 | ||
423 | // correct for distance to IP different in PRE/ECAL/HCAL | |
424 | Float_t d = 0. ; | |
425 | if (sect == 1) | |
426 | d = GetIP2PRESection() - GetIPDistance() ; | |
427 | else if (sect == 0) | |
428 | d = GetIP2ECALSection() - GetIPDistance() ; | |
429 | else if (sect == 2) | |
430 | d = GetIP2HCALSection() - GetIPDistance() ; | |
431 | else | |
432 | Fatal("PosInAlice", "Unexpected tower section!") ; | |
433 | ||
434 | Float_t correction = 1 + d/GetIPDistance() ; | |
435 | Float_t tantheta = TMath::Tan(theta) * correction ; | |
436 | theta = TMath::ATan(tantheta) * TMath::RadToDeg() ; | |
437 | if (theta < 0 ) | |
438 | theta += 180. ; | |
439 | ||
440 | return; | |
441 | } | |
ca8f5bd0 | 442 | |
395c7ba2 | 443 | //______________________________________________________________________ |
444 | void AliEMCALGeometry::PosInAlice(const Int_t absid, Float_t &theta, Float_t &phi) const | |
445 | { | |
446 | // Converts the relative numbering into the local EMCAL-module (x, z) | |
447 | // coordinates | |
448 | ||
449 | Int_t relid[4] ; | |
450 | AbsToRelNumbering(absid, relid) ; | |
451 | Int_t ieta = relid[2]; // offset along x axis | |
452 | Int_t iphi = relid[3]; // offset along z axis | |
453 | Int_t index; | |
454 | Float_t eta; | |
455 | ||
456 | index = TowerIndex(ieta,iphi); | |
457 | EtaPhiFromIndex(index,eta,phi); | |
458 | theta = 2.0*TMath::ATan(TMath::Exp(-eta)) ; | |
459 | ||
460 | // correct for distance to IP different in PRE/ECAL/HCAL | |
461 | Float_t d = 0. ; | |
462 | if (IsInPRE(absid)) | |
463 | d = GetIP2PRESection() - GetIPDistance() ; | |
464 | else if (IsInECAL(absid)) | |
465 | d = GetIP2ECALSection() - GetIPDistance() ; | |
466 | else if (IsInHCAL(absid)) | |
467 | d = GetIP2HCALSection() - GetIPDistance() ; | |
468 | else | |
469 | Fatal("PosInAlice", "Unexpected id # %d!", absid) ; | |
470 | ||
471 | Float_t correction = 1 + d/GetIPDistance() ; | |
472 | Float_t tantheta = TMath::Tan(theta) * correction ; | |
473 | theta = TMath::ATan(tantheta) * TMath::RadToDeg() ; | |
474 | if (theta < 0 ) | |
475 | theta += 180. ; | |
476 | ||
477 | return; | |
ca8f5bd0 | 478 | } |
6119e5db | 479 | |
480 | //______________________________________________________________________ | |
481 | void AliEMCALGeometry::XYZFromIndex(const Int_t *relid,Float_t &x,Float_t &y, Float_t &z) const { | |
482 | // given the tower relative number it returns the X, Y and Z | |
483 | // of the tower. | |
484 | ||
485 | // Outputs: | |
486 | // Float_t x // x of center of tower in cm | |
487 | // Float_t y // y of center of tower in cm | |
488 | // Float_t z // z of centre of tower in cm | |
489 | // Returned | |
490 | // none. | |
491 | ||
395c7ba2 | 492 | Float_t eta,theta, phi,cyl_radius=0. ; |
6119e5db | 493 | |
494 | Int_t ieta = relid[2]; // offset along x axis | |
495 | Int_t iphi = relid[3]; // offset along z axis | |
395c7ba2 | 496 | Int_t ipre = relid[1]; // indicates 0 ECAL section, 1 PRE section, 2 HCAL section. |
6119e5db | 497 | Int_t index; |
498 | ||
395c7ba2 | 499 | index = TowerIndex(ieta,iphi); |
6119e5db | 500 | EtaPhiFromIndex(index,eta,phi); |
501 | theta = 180.*(2.0*TMath::ATan(TMath::Exp(-eta)))/TMath::Pi(); | |
6119e5db | 502 | |
395c7ba2 | 503 | if ( ipre == 0 ) |
504 | cyl_radius = GetIP2ECALSection() ; | |
505 | else if ( ipre == 1 ) | |
506 | cyl_radius = GetIP2PRESection() ; | |
507 | else if ( ipre == 2 ) | |
508 | cyl_radius = GetIP2HCALSection() ; | |
a97849a9 | 509 | else |
395c7ba2 | 510 | Fatal("XYZFromIndex", "Unexpected Tower section # %d", ipre) ; |
a97849a9 | 511 | |
395c7ba2 | 512 | Double_t kDeg2Rad = TMath::DegToRad() ; |
6119e5db | 513 | x = cyl_radius * TMath::Cos(phi * kDeg2Rad ) ; |
f6eaf97a | 514 | y = cyl_radius * TMath::Sin(phi * kDeg2Rad ) ; |
6119e5db | 515 | z = cyl_radius / TMath::Tan(theta * kDeg2Rad ) ; |
516 | ||
517 | return; | |
518 | } | |
519 | ||
395c7ba2 | 520 | //______________________________________________________________________ |
521 | void AliEMCALGeometry::XYZFromIndex(const Int_t absid, TVector3 &v) const { | |
522 | // given the tower relative number it returns the X, Y and Z | |
523 | // of the tower. | |
524 | ||
525 | // Outputs: | |
526 | // Float_t x // x of center of tower in cm | |
527 | // Float_t y // y of center of tower in cm | |
528 | // Float_t z // z of centre of tower in cm | |
529 | // Returned | |
530 | // none. | |
531 | ||
532 | Float_t theta, phi,cyl_radius=0. ; | |
533 | ||
534 | PosInAlice(absid, theta, phi) ; | |
535 | ||
536 | if ( IsInECAL(absid) ) | |
537 | cyl_radius = GetIP2ECALSection() ; | |
538 | else if ( IsInPRE(absid) ) | |
539 | cyl_radius = GetIP2PRESection() ; | |
540 | else if ( IsInHCAL(absid) ) | |
541 | cyl_radius = GetIP2HCALSection() ; | |
542 | else | |
543 | Fatal("XYZFromIndex", "Unexpected Tower section") ; | |
544 | ||
545 | Double_t kDeg2Rad = TMath::DegToRad() ; | |
546 | v.SetX(cyl_radius * TMath::Cos(phi * kDeg2Rad ) ); | |
547 | v.SetY(cyl_radius * TMath::Sin(phi * kDeg2Rad ) ); | |
548 | v.SetZ(cyl_radius / TMath::Tan(theta * kDeg2Rad ) ) ; | |
549 | ||
550 | return; | |
551 | } | |
552 | ||
ca8f5bd0 | 553 | //______________________________________________________________________ |
554 | /* | |
a34b7b9f | 555 | Boot_t AliEMCALGeometry::AreNeighbours(Int_t index1,Int_t index2) const { |
ca8f5bd0 | 556 | // Returns kTRUE if the two towers are neighbours or not, including |
557 | // diagonals. Both indexes are required to be either towers or preshower. | |
558 | // Inputs: | |
559 | // Int_t index1 // index of tower 1 | |
560 | // Int_t index2 // index of tower 2 | |
561 | // Outputs: | |
562 | // none. | |
563 | // Returned | |
564 | // Boot_t kTRUE if the towers are neighbours otherwise false. | |
565 | Boot_t anb = kFALSE; | |
e908f07f | 566 | Int_t ieta1 = 0, ieta2 = 0, iphi1 = 0, iphi2 = 0, ipre1 = 0, ipre2 = 0; |
ca8f5bd0 | 567 | |
e908f07f | 568 | TowerIndexes(index1,ieta1,iphi1,ipre1); |
569 | TowerIndexes(index2,ieta2,iphi2,ipre2); | |
ca8f5bd0 | 570 | if(ipre1!=ipre2) return anb; |
e908f07f | 571 | if((ieta1>=ieta2-1 && ieta1<=ieta2+1) && (iphi1>=iphi2-1 &&iphi1<=iphi2+1)) |
ca8f5bd0 | 572 | anb = kTRUE; |
573 | return anb; | |
574 | } | |
575 | */ |