]>
Commit | Line | Data |
---|---|---|
f7336fa3 | 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 | ||
afc51ac2 | 16 | /* $Id$ */ |
f7336fa3 | 17 | |
18 | /////////////////////////////////////////////////////////////////////////////// | |
19 | // // | |
20 | // TRD geometry class // | |
21 | // // | |
22 | /////////////////////////////////////////////////////////////////////////////// | |
23 | ||
793ff80c | 24 | |
bdbb05bb | 25 | #include <TError.h> |
26 | ||
27 | #include "AliRunLoader.h" | |
f7336fa3 | 28 | #include "AliTRDgeometry.h" |
5443e65e | 29 | #include "AliTRDparameter.h" |
a5cadd36 | 30 | #include "AliTRDpadPlane.h" |
f7336fa3 | 31 | |
ecb36af7 | 32 | #include "AliRun.h" |
33 | #include "AliTRD.h" | |
34 | ||
f7336fa3 | 35 | ClassImp(AliTRDgeometry) |
36 | ||
793ff80c | 37 | //_____________________________________________________________________________ |
38 | ||
39 | // | |
40 | // The geometry constants | |
41 | // | |
42 | const Int_t AliTRDgeometry::fgkNsect = kNsect; | |
43 | const Int_t AliTRDgeometry::fgkNplan = kNplan; | |
44 | const Int_t AliTRDgeometry::fgkNcham = kNcham; | |
45 | const Int_t AliTRDgeometry::fgkNdet = kNdet; | |
46 | ||
47 | // | |
48 | // Dimensions of the detector | |
49 | // | |
0a770ac9 | 50 | |
51 | // Inner and outer radius of the mother volumes | |
793ff80c | 52 | const Float_t AliTRDgeometry::fgkRmin = 294.0; |
53 | const Float_t AliTRDgeometry::fgkRmax = 368.0; | |
54 | ||
0a770ac9 | 55 | // Upper and lower length of the mother volumes |
793ff80c | 56 | const Float_t AliTRDgeometry::fgkZmax1 = 378.35; |
57 | const Float_t AliTRDgeometry::fgkZmax2 = 302.0; | |
58 | ||
0a770ac9 | 59 | // Parameter of the BTR mother volumes |
793ff80c | 60 | const Float_t AliTRDgeometry::fgkSheight = 74.0; |
61 | const Float_t AliTRDgeometry::fgkSwidth1 = 99.613; | |
62 | const Float_t AliTRDgeometry::fgkSwidth2 = 125.707; | |
63 | const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0; | |
64 | const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5; | |
65 | const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5; | |
66 | ||
73ae7b59 | 67 | // The super module side plates |
287c5d50 | 68 | const Float_t AliTRDgeometry::fgkSMpltT = 0.2; |
69 | const Float_t AliTRDgeometry::fgkSMgapT = 0.5; | |
73ae7b59 | 70 | |
0a770ac9 | 71 | // Height of different chamber parts |
72 | // Radiator | |
73 | const Float_t AliTRDgeometry::fgkCraH = 4.8; | |
74 | // Drift region | |
75 | const Float_t AliTRDgeometry::fgkCdrH = 3.0; | |
76 | // Amplification region | |
77 | const Float_t AliTRDgeometry::fgkCamH = 0.7; | |
78 | // Readout | |
73ae7b59 | 79 | const Float_t AliTRDgeometry::fgkCroH = 2.316; |
0a770ac9 | 80 | // Total height |
81 | const Float_t AliTRDgeometry::fgkCH = AliTRDgeometry::fgkCraH | |
82 | + AliTRDgeometry::fgkCdrH | |
83 | + AliTRDgeometry::fgkCamH | |
84 | + AliTRDgeometry::fgkCroH; | |
85 | ||
86 | // Vertical spacing of the chambers | |
73ae7b59 | 87 | const Float_t AliTRDgeometry::fgkVspace = 1.784; |
0a770ac9 | 88 | |
89 | // Horizontal spacing of the chambers | |
90 | const Float_t AliTRDgeometry::fgkHspace = 2.0; | |
91 | ||
92 | // Thicknesses of different parts of the chamber frame | |
93 | // Lower aluminum frame | |
94 | const Float_t AliTRDgeometry::fgkCalT = 0.3; | |
95 | // Lower G10 frame sides | |
96 | const Float_t AliTRDgeometry::fgkCclsT = 0.3; | |
97 | // Lower G10 frame front | |
98 | const Float_t AliTRDgeometry::fgkCclfT = 1.0; | |
99 | // Upper G10 frame | |
100 | const Float_t AliTRDgeometry::fgkCcuT = 0.9; | |
101 | // Upper Al frame | |
102 | const Float_t AliTRDgeometry::fgkCauT = 1.5; | |
103 | ||
104 | // Additional width of the readout chamber frames | |
105 | const Float_t AliTRDgeometry::fgkCroW = 0.9; | |
106 | ||
107 | // Difference of outer chamber width and pad plane width | |
73ae7b59 | 108 | //const Float_t AliTRDgeometry::fgkCpadW = 1.0; |
109 | const Float_t AliTRDgeometry::fgkCpadW = 0.0; | |
de6df1b1 | 110 | const Float_t AliTRDgeometry::fgkRpadW = 1.0; |
793ff80c | 111 | |
112 | // | |
113 | // Thickness of the the material layers | |
114 | // | |
db30bf0f | 115 | const Float_t AliTRDgeometry::fgkRaThick = 0.3646; |
793ff80c | 116 | const Float_t AliTRDgeometry::fgkMyThick = 0.005; |
0a770ac9 | 117 | const Float_t AliTRDgeometry::fgkDrThick = AliTRDgeometry::fgkCdrH; |
118 | const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkCamH; | |
119 | const Float_t AliTRDgeometry::fgkXeThick = AliTRDgeometry::fgkDrThick | |
120 | + AliTRDgeometry::fgkAmThick; | |
793ff80c | 121 | const Float_t AliTRDgeometry::fgkCuThick = 0.001; |
122 | const Float_t AliTRDgeometry::fgkSuThick = 0.06; | |
123 | const Float_t AliTRDgeometry::fgkFeThick = 0.0044; | |
124 | const Float_t AliTRDgeometry::fgkCoThick = 0.02; | |
db30bf0f | 125 | const Float_t AliTRDgeometry::fgkWaThick = 0.02; |
793ff80c | 126 | |
127 | // | |
128 | // Position of the material layers | |
129 | // | |
0a770ac9 | 130 | const Float_t AliTRDgeometry::fgkRaZpos = -1.50; |
131 | const Float_t AliTRDgeometry::fgkMyZpos = 0.895; | |
132 | const Float_t AliTRDgeometry::fgkDrZpos = 2.4; | |
133 | const Float_t AliTRDgeometry::fgkAmZpos = 0.0; | |
134 | const Float_t AliTRDgeometry::fgkCuZpos = -0.9995; | |
793ff80c | 135 | const Float_t AliTRDgeometry::fgkSuZpos = 0.0000; |
0a770ac9 | 136 | const Float_t AliTRDgeometry::fgkFeZpos = 0.0322; |
137 | const Float_t AliTRDgeometry::fgkCoZpos = 0.97; | |
138 | const Float_t AliTRDgeometry::fgkWaZpos = 0.99; | |
793ff80c | 139 | |
f7336fa3 | 140 | //_____________________________________________________________________________ |
141 | AliTRDgeometry::AliTRDgeometry():AliGeometry() | |
142 | { | |
143 | // | |
144 | // AliTRDgeometry default constructor | |
145 | // | |
146 | ||
147 | Init(); | |
148 | ||
149 | } | |
150 | ||
151 | //_____________________________________________________________________________ | |
152 | AliTRDgeometry::~AliTRDgeometry() | |
153 | { | |
8230f242 | 154 | // |
155 | // AliTRDgeometry destructor | |
156 | // | |
f7336fa3 | 157 | |
158 | } | |
159 | ||
160 | //_____________________________________________________________________________ | |
161 | void AliTRDgeometry::Init() | |
162 | { | |
163 | // | |
164 | // Initializes the geometry parameter | |
165 | // | |
f7336fa3 | 166 | // The maximum number of pads |
167 | // and the position of pad 0,0,0 | |
168 | // | |
169 | // chambers seen from the top: | |
170 | // +----------------------------+ | |
171 | // | | | |
793ff80c | 172 | // | | ^ |
173 | // | | rphi| | |
174 | // | | | | |
175 | // |0 | | | |
176 | // +----------------------------+ +------> | |
f7336fa3 | 177 | // z |
793ff80c | 178 | // chambers seen from the side: ^ |
179 | // +----------------------------+ drift| | |
180 | // |0 | | | |
181 | // | | | | |
182 | // +----------------------------+ +------> | |
f7336fa3 | 183 | // z |
184 | // | |
a2b90f83 | 185 | // IMPORTANT: time bin 0 is now the first one in the drift region |
186 | // closest to the readout !!! | |
793ff80c | 187 | // |
f7336fa3 | 188 | |
0a770ac9 | 189 | Int_t icham; |
190 | Int_t iplan; | |
191 | Int_t isect; | |
192 | ||
193 | // The outer width of the chambers | |
e0d47c25 | 194 | // |
195 | // Changed with the introduction of | |
196 | // the new layer 0. The old layer 6 | |
197 | // is removed. | |
287c5d50 | 198 | fCwidth[0] = 90.4; |
e0d47c25 | 199 | fCwidth[1] = 94.8; |
200 | fCwidth[2] = 99.3; | |
201 | fCwidth[3] = 103.7; | |
202 | fCwidth[4] = 108.1; | |
203 | fCwidth[5] = 112.6; | |
204 | // Old layer 6 | |
205 | // fCwidth[5] = 117.0; | |
0a770ac9 | 206 | |
207 | // The outer lengths of the chambers | |
73ae7b59 | 208 | // Includes the spacings between the chambers! |
e0d47c25 | 209 | // Changed with the introduction of |
210 | // the new layer 0. The old layer 6 | |
211 | // is removed. | |
8737e16f | 212 | Float_t length[kNplan][kNcham] = { { 124.0, 124.0, 110.0, 124.0, 124.0 } |
e0d47c25 | 213 | , { 124.0, 124.0, 110.0, 124.0, 124.0 } |
8737e16f | 214 | , { 131.0, 131.0, 110.0, 131.0, 131.0 } |
215 | , { 138.0, 138.0, 110.0, 138.0, 138.0 } | |
216 | , { 145.0, 145.0, 110.0, 145.0, 145.0 } | |
e0d47c25 | 217 | , { 147.0, 147.0, 110.0, 147.0, 147.0 } }; |
218 | // Old layer 6 | |
219 | // , { 147.0, 147.0, 110.0, 147.0, 147.0 } }; | |
0a770ac9 | 220 | |
221 | for (icham = 0; icham < kNcham; icham++) { | |
222 | for (iplan = 0; iplan < kNplan; iplan++) { | |
223 | fClength[iplan][icham] = length[iplan][icham]; | |
224 | fClengthPH[iplan][icham] = 0.0; | |
225 | fClengthRH[iplan][icham] = 0.0; | |
226 | } | |
227 | } | |
228 | ||
793ff80c | 229 | // The rotation matrix elements |
230 | Float_t phi = 0; | |
231 | for (isect = 0; isect < fgkNsect; isect++) { | |
5443e65e | 232 | phi = -2.0 * TMath::Pi() / (Float_t) fgkNsect * ((Float_t) isect + 0.5); |
793ff80c | 233 | fRotA11[isect] = TMath::Cos(phi); |
234 | fRotA12[isect] = TMath::Sin(phi); | |
235 | fRotA21[isect] = TMath::Sin(phi); | |
236 | fRotA22[isect] = TMath::Cos(phi); | |
237 | phi = -1.0 * phi; | |
238 | fRotB11[isect] = TMath::Cos(phi); | |
239 | fRotB12[isect] = TMath::Sin(phi); | |
240 | fRotB21[isect] = TMath::Sin(phi); | |
241 | fRotB22[isect] = TMath::Cos(phi); | |
242 | } | |
243 | ||
244 | } | |
245 | ||
f7336fa3 | 246 | //_____________________________________________________________________________ |
73ae7b59 | 247 | void AliTRDgeometry::CreateGeometry(Int_t* ) |
f7336fa3 | 248 | { |
249 | // | |
0a770ac9 | 250 | // Create TRD geometry |
251 | // | |
f7336fa3 | 252 | |
253 | } | |
254 | ||
255 | //_____________________________________________________________________________ | |
a5cadd36 | 256 | Bool_t AliTRDgeometry::Local2Global(Int_t idet, Double_t *local |
257 | , Double_t *global | |
5443e65e | 258 | , AliTRDparameter *par) const |
f7336fa3 | 259 | { |
260 | // | |
261 | // Converts local pad-coordinates (row,col,time) into | |
262 | // global ALICE reference frame coordinates (x,y,z) | |
263 | // | |
264 | ||
793ff80c | 265 | Int_t icham = GetChamber(idet); // Chamber info (0-4) |
266 | Int_t isect = GetSector(idet); // Sector info (0-17) | |
267 | Int_t iplan = GetPlane(idet); // Plane info (0-5) | |
f7336fa3 | 268 | |
5443e65e | 269 | return Local2Global(iplan,icham,isect,local,global,par); |
f7336fa3 | 270 | |
271 | } | |
272 | ||
273 | //_____________________________________________________________________________ | |
274 | Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect | |
a5cadd36 | 275 | , Double_t *local, Double_t *global |
5443e65e | 276 | , AliTRDparameter *par) const |
f7336fa3 | 277 | { |
278 | // | |
279 | // Converts local pad-coordinates (row,col,time) into | |
280 | // global ALICE reference frame coordinates (x,y,z) | |
281 | // | |
282 | ||
5443e65e | 283 | if (!par) { |
284 | Error("Local2Global","No parameter defined\n"); | |
285 | return kFALSE; | |
286 | } | |
287 | ||
a5cadd36 | 288 | AliTRDpadPlane *padPlane = par->GetPadPlane(iplan,icham); |
f7336fa3 | 289 | |
a5cadd36 | 290 | // calculate (x,y,z) position in rotated chamber |
291 | Int_t row = ((Int_t) local[0]); | |
292 | Int_t col = ((Int_t) local[1]); | |
293 | Float_t timeSlice = local[2] + 0.5; | |
5443e65e | 294 | Float_t time0 = par->GetTime0(iplan); |
f7336fa3 | 295 | |
a5cadd36 | 296 | Double_t rot[3]; |
5443e65e | 297 | rot[0] = time0 - (timeSlice - par->GetTimeBefore()) |
ccb4315c | 298 | * par->GetDriftVelocity()/par->GetSamplingFrequency(); |
a5cadd36 | 299 | rot[1] = padPlane->GetColPos(col) - 0.5 * padPlane->GetColSize(col); |
300 | rot[2] = padPlane->GetRowPos(row) - 0.5 * padPlane->GetRowSize(row); | |
f7336fa3 | 301 | |
302 | // Rotate back to original position | |
a5cadd36 | 303 | Int_t idet = GetDetector(iplan,icham,isect); |
f7336fa3 | 304 | return RotateBack(idet,rot,global); |
305 | ||
306 | } | |
307 | ||
3d7b6a24 | 308 | //_____________________________________________________________________________ |
a5cadd36 | 309 | Bool_t AliTRDgeometry::Global2Local(Int_t mode, Double_t *local, Double_t *global |
310 | , Int_t* index, AliTRDparameter *par) const | |
3d7b6a24 | 311 | { |
312 | // | |
313 | // Converts local pad-coordinates (row,col,time) into | |
314 | // global ALICE reference frame coordinates (x,y,z) | |
315 | // | |
e0d47c25 | 316 | // index[0] = plane number |
317 | // index[1] = chamber number | |
318 | // index[2] = sector number | |
3d7b6a24 | 319 | // |
320 | // mode=0 - local coordinate in y, z, x - rotated global | |
321 | // mode=2 - local coordinate in pad, and pad row, x - rotated global | |
322 | // | |
e0d47c25 | 323 | |
3d7b6a24 | 324 | if (!par) { |
325 | Error("Local2Global","No parameter defined\n"); | |
326 | return kFALSE; | |
327 | } | |
328 | ||
329 | //Int_t idet = GetDetector(iplan,icham,isect); // Detector number | |
330 | Int_t idet = GetDetector(index[0],index[1],index[2]); // Detector number | |
331 | Rotate(idet,global,local); | |
332 | if (mode==0) return kTRUE; | |
333 | // | |
334 | // Float_t row0 = par->GetRow0(iplan,icham,isect); | |
335 | //Float_t col0 = par->GetCol0(iplan); | |
336 | //Float_t time0 = par->GetTime0(iplan); | |
337 | // | |
338 | // mode 1 to be implemented later | |
339 | // calculate (x,y,z) position in time bin pad row pad | |
340 | // | |
341 | //rot[0] = time0 - (timeSlice - par->GetTimeBefore()) | |
ccb4315c | 342 | // * par->GetDriftVelocity()/par->GetSamplingFrequency(); |
3d7b6a24 | 343 | //rot[1] = col0 + padCol |
344 | // * par->GetColPadSize(iplan); | |
345 | //rot[2] = row0 + padRow | |
346 | // * par->GetRowPadSize(iplan,icham,isect); | |
347 | ||
348 | return kTRUE; | |
349 | ||
350 | } | |
351 | ||
a5cadd36 | 352 | //_____________________________________________________________________________ |
353 | Bool_t AliTRDgeometry::Global2Detector(Double_t global[3], Int_t index[3] | |
354 | , AliTRDparameter *par) | |
3d7b6a24 | 355 | { |
356 | // | |
e0d47c25 | 357 | // input = global position |
358 | // output = index | |
359 | // index[0] = plane number | |
360 | // index[1] = chamber number | |
361 | // index[2] = sector number | |
3d7b6a24 | 362 | // |
e0d47c25 | 363 | |
3d7b6a24 | 364 | Float_t fi; |
365 | // | |
366 | fi = TMath::ATan2(global[1],global[0]); | |
367 | if (fi<0) fi += 2*TMath::Pi(); | |
368 | index[2] = Int_t(TMath::Nint((fi - GetAlpha()/2.)/GetAlpha())); | |
369 | // | |
370 | // | |
371 | Float_t locx = global[0] * fRotA11[index[2]] + global[1] * fRotA12[index[2]]; | |
372 | index[0] = 0; | |
373 | Float_t max = locx-par->GetTime0(0); | |
374 | for (Int_t iplane=1; iplane<fgkNplan;iplane++){ | |
375 | Float_t dist = TMath::Abs(locx-par->GetTime0(iplane)); | |
376 | if (dist < max){ | |
377 | index[0] = iplane; | |
378 | max = dist; | |
379 | } | |
380 | } | |
381 | Float_t theta = TMath::ATan2(global[2],locx); | |
382 | index[1] = TMath::Nint(float(fgkNcham)*theta/(0.25*TMath::Pi())); | |
383 | return kTRUE; | |
384 | ||
385 | } | |
386 | ||
387 | ||
f7336fa3 | 388 | //_____________________________________________________________________________ |
a5cadd36 | 389 | Bool_t AliTRDgeometry::Rotate(Int_t d, Double_t *pos, Double_t *rot) const |
f7336fa3 | 390 | { |
391 | // | |
392 | // Rotates all chambers in the position of sector 0 and transforms | |
393 | // the coordinates in the ALICE restframe <pos> into the | |
394 | // corresponding local frame <rot>. | |
395 | // | |
396 | ||
793ff80c | 397 | Int_t sector = GetSector(d); |
f7336fa3 | 398 | |
793ff80c | 399 | rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector]; |
400 | rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector]; | |
f7336fa3 | 401 | rot[2] = pos[2]; |
402 | ||
403 | return kTRUE; | |
404 | ||
405 | } | |
406 | ||
407 | //_____________________________________________________________________________ | |
a5cadd36 | 408 | Bool_t AliTRDgeometry::RotateBack(Int_t d, Double_t *rot, Double_t *pos) const |
f7336fa3 | 409 | { |
410 | // | |
411 | // Rotates a chambers from the position of sector 0 into its | |
412 | // original position and transforms the corresponding local frame | |
413 | // coordinates <rot> into the coordinates of the ALICE restframe <pos>. | |
414 | // | |
415 | ||
793ff80c | 416 | Int_t sector = GetSector(d); |
f7336fa3 | 417 | |
793ff80c | 418 | pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector]; |
419 | pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector]; | |
6f1e466d | 420 | pos[2] = rot[2]; |
f7336fa3 | 421 | |
422 | return kTRUE; | |
423 | ||
424 | } | |
425 | ||
426 | //_____________________________________________________________________________ | |
afc51ac2 | 427 | Int_t AliTRDgeometry::GetDetectorSec(Int_t p, Int_t c) const |
0a770ac9 | 428 | { |
429 | // | |
430 | // Convert plane / chamber into detector number for one single sector | |
431 | // | |
432 | ||
433 | return (p + c * fgkNplan); | |
434 | ||
435 | } | |
436 | ||
437 | //_____________________________________________________________________________ | |
afc51ac2 | 438 | Int_t AliTRDgeometry::GetDetector(Int_t p, Int_t c, Int_t s) const |
f7336fa3 | 439 | { |
440 | // | |
441 | // Convert plane / chamber / sector into detector number | |
442 | // | |
443 | ||
793ff80c | 444 | return (p + c * fgkNplan + s * fgkNplan * fgkNcham); |
f7336fa3 | 445 | |
446 | } | |
447 | ||
448 | //_____________________________________________________________________________ | |
afc51ac2 | 449 | Int_t AliTRDgeometry::GetPlane(Int_t d) const |
f7336fa3 | 450 | { |
451 | // | |
452 | // Reconstruct the plane number from the detector number | |
453 | // | |
454 | ||
793ff80c | 455 | return ((Int_t) (d % fgkNplan)); |
f7336fa3 | 456 | |
457 | } | |
458 | ||
459 | //_____________________________________________________________________________ | |
afc51ac2 | 460 | Int_t AliTRDgeometry::GetChamber(Int_t d) const |
f7336fa3 | 461 | { |
462 | // | |
463 | // Reconstruct the chamber number from the detector number | |
464 | // | |
465 | ||
793ff80c | 466 | return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan); |
f7336fa3 | 467 | |
468 | } | |
469 | ||
470 | //_____________________________________________________________________________ | |
afc51ac2 | 471 | Int_t AliTRDgeometry::GetSector(Int_t d) const |
f7336fa3 | 472 | { |
473 | // | |
474 | // Reconstruct the sector number from the detector number | |
475 | // | |
476 | ||
793ff80c | 477 | return ((Int_t) (d / (fgkNplan * fgkNcham))); |
f7336fa3 | 478 | |
479 | } | |
480 | ||
bdbb05bb | 481 | //_____________________________________________________________________________ |
482 | AliTRDgeometry* AliTRDgeometry::GetGeometry(AliRunLoader* runLoader) | |
483 | { | |
484 | // | |
485 | // load the geometry from the galice file | |
486 | // | |
487 | ||
488 | if (!runLoader) runLoader = AliRunLoader::GetRunLoader(); | |
489 | if (!runLoader) { | |
490 | ::Error("AliTRDgeometry::GetGeometry", "No run loader"); | |
491 | return NULL; | |
492 | } | |
493 | ||
494 | TDirectory* saveDir = gDirectory; | |
495 | runLoader->CdGAFile(); | |
496 | ||
ecb36af7 | 497 | // Try from the galice.root file |
bdbb05bb | 498 | AliTRDgeometry* geom = (AliTRDgeometry*) gDirectory->Get("TRDgeometry"); |
ecb36af7 | 499 | |
500 | if (!geom) { | |
501 | // It is not in the file, try to get it from gAlice, | |
502 | // which corresponds to the run loader | |
503 | AliTRD * trd = (AliTRD*)runLoader->GetAliRun()->GetDetector("TRD"); | |
504 | geom = trd->GetGeometry(); | |
505 | } | |
bdbb05bb | 506 | if (!geom) ::Error("AliTRDgeometry::GetGeometry", "Geometry not found"); |
507 | ||
508 | saveDir->cd(); | |
509 | return geom; | |
510 | } |