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Enhanced full event Config
[u/mrichter/AliRoot.git] / TRD / AliTRDgeometry.cxx
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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
16/*
17$Log$
793ff80c 18Revision 1.1.4.7 2000/10/16 01:16:53 cblume
19Changed timebin 0 to be the one closest to the readout
20
21Revision 1.1.4.6 2000/10/15 23:35:57 cblume
22Include geometry constants as static member
23
24Revision 1.1.4.5 2000/10/06 16:49:46 cblume
25Made Getters const
26
27Revision 1.1.4.4 2000/10/04 16:34:58 cblume
28Replace include files by forward declarations
29
30Revision 1.1.4.3 2000/09/22 14:43:40 cblume
31Allow the pad/timebin-dimensions to be changed after initialization
32
33Revision 1.1.4.2 2000/09/18 13:37:01 cblume
34Minor coding corrections
35
36Revision 1.5 2000/10/02 21:28:19 fca
37Removal of useless dependecies via forward declarations
38
39Revision 1.4 2000/06/08 18:32:58 cblume
40Make code compliant to coding conventions
41
42Revision 1.3 2000/06/07 16:25:37 cblume
43Try to remove compiler warnings on Sun and HP
44
45Revision 1.2 2000/05/08 16:17:27 cblume
46Merge TRD-develop
47
48Revision 1.1.4.1 2000/05/08 14:45:55 cblume
49Bug fix in RotateBack(). Geometry update
50
94de3818 51Revision 1.4 2000/06/08 18:32:58 cblume
52Make code compliant to coding conventions
53
8230f242 54Revision 1.3 2000/06/07 16:25:37 cblume
55Try to remove compiler warnings on Sun and HP
56
9d0b222b 57Revision 1.2 2000/05/08 16:17:27 cblume
58Merge TRD-develop
59
6f1e466d 60Revision 1.1.4.1 2000/05/08 14:45:55 cblume
61Bug fix in RotateBack(). Geometry update
62
63Revision 1.1 2000/02/28 19:00:44 cblume
64Add new TRD classes
65
f7336fa3 66*/
67
68///////////////////////////////////////////////////////////////////////////////
69// //
70// TRD geometry class //
71// //
72///////////////////////////////////////////////////////////////////////////////
73
793ff80c 74#include "AliMC.h"
75
f7336fa3 76#include "AliTRDgeometry.h"
77#include "AliTRDrecPoint.h"
94de3818 78#include "AliMC.h"
f7336fa3 79
80ClassImp(AliTRDgeometry)
81
793ff80c 82//_____________________________________________________________________________
83
84 //
85 // The geometry constants
86 //
87 const Int_t AliTRDgeometry::fgkNsect = kNsect;
88 const Int_t AliTRDgeometry::fgkNplan = kNplan;
89 const Int_t AliTRDgeometry::fgkNcham = kNcham;
90 const Int_t AliTRDgeometry::fgkNdet = kNdet;
91
92 //
93 // Dimensions of the detector
94 //
95 const Float_t AliTRDgeometry::fgkRmin = 294.0;
96 const Float_t AliTRDgeometry::fgkRmax = 368.0;
97
98 const Float_t AliTRDgeometry::fgkZmax1 = 378.35;
99 const Float_t AliTRDgeometry::fgkZmax2 = 302.0;
100
101 const Float_t AliTRDgeometry::fgkSheight = 74.0;
102 const Float_t AliTRDgeometry::fgkSwidth1 = 99.613;
103 const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
104 const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
105 const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5;
106 const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;
107
108 const Float_t AliTRDgeometry::fgkCheight = 11.0;
109 const Float_t AliTRDgeometry::fgkCspace = 1.6;
110 const Float_t AliTRDgeometry::fgkCathick = 1.0;
111 const Float_t AliTRDgeometry::fgkCcthick = 1.0;
112 const Float_t AliTRDgeometry::fgkCaframe = 2.675;
113 const Float_t AliTRDgeometry::fgkCcframe = AliTRDgeometry::fgkCheight
114 - AliTRDgeometry::fgkCaframe;
115
116 //
117 // Thickness of the the material layers
118 //
119 const Float_t AliTRDgeometry::fgkSeThick = 0.02;
120 const Float_t AliTRDgeometry::fgkRaThick = 4.8;
121 const Float_t AliTRDgeometry::fgkPeThick = 0.20;
122 const Float_t AliTRDgeometry::fgkMyThick = 0.005;
123 const Float_t AliTRDgeometry::fgkXeThick = 3.5;
124 const Float_t AliTRDgeometry::fgkDrThick = 3.0;
125 const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkXeThick
126 - AliTRDgeometry::fgkDrThick;
127 const Float_t AliTRDgeometry::fgkCuThick = 0.001;
128 const Float_t AliTRDgeometry::fgkSuThick = 0.06;
129 const Float_t AliTRDgeometry::fgkFeThick = 0.0044;
130 const Float_t AliTRDgeometry::fgkCoThick = 0.02;
131 const Float_t AliTRDgeometry::fgkWaThick = 0.01;
132
133 //
134 // Position of the material layers
135 //
136 const Float_t AliTRDgeometry::fgkSeZpos = -4.1525;
137 const Float_t AliTRDgeometry::fgkRaZpos = -1.7425;
138 const Float_t AliTRDgeometry::fgkPeZpos = 0.0000;
139 const Float_t AliTRDgeometry::fgkMyZpos = 0.6600;
140 const Float_t AliTRDgeometry::fgkDrZpos = 2.1625;
141 const Float_t AliTRDgeometry::fgkAmZpos = 4.1125;
142 const Float_t AliTRDgeometry::fgkCuZpos = -1.3370;
143 const Float_t AliTRDgeometry::fgkSuZpos = 0.0000;
144 const Float_t AliTRDgeometry::fgkFeZpos = 1.3053;
145 const Float_t AliTRDgeometry::fgkCoZpos = 1.3175;
146 const Float_t AliTRDgeometry::fgkWaZpos = 1.3325;
147
f7336fa3 148//_____________________________________________________________________________
149AliTRDgeometry::AliTRDgeometry():AliGeometry()
150{
151 //
152 // AliTRDgeometry default constructor
153 //
154
155 Init();
156
157}
158
159//_____________________________________________________________________________
160AliTRDgeometry::~AliTRDgeometry()
161{
8230f242 162 //
163 // AliTRDgeometry destructor
164 //
f7336fa3 165
166}
167
168//_____________________________________________________________________________
169void AliTRDgeometry::Init()
170{
171 //
172 // Initializes the geometry parameter
173 //
174
793ff80c 175 Int_t isect;
f7336fa3 176
177 // The width of the chambers
793ff80c 178 fCwidth[0] = 99.6;
179 fCwidth[1] = 104.1;
180 fCwidth[2] = 108.5;
181 fCwidth[3] = 112.9;
182 fCwidth[4] = 117.4;
183 fCwidth[5] = 121.8;
f7336fa3 184
185 // The maximum number of pads
186 // and the position of pad 0,0,0
187 //
188 // chambers seen from the top:
189 // +----------------------------+
190 // | |
793ff80c 191 // | | ^
192 // | | rphi|
193 // | | |
194 // |0 | |
195 // +----------------------------+ +------>
f7336fa3 196 // z
793ff80c 197 // chambers seen from the side: ^
198 // +----------------------------+ drift|
199 // |0 | |
200 // | | |
201 // +----------------------------+ +------>
f7336fa3 202 // z
203 //
793ff80c 204 // IMPORTANT: time bin 0 is now the one closest to the readout !!!
205 //
f7336fa3 206
207 // The pad column (rphi-direction)
793ff80c 208 SetColPadSize(1.0);
209
210 // The time bucket
211 SetTimeBinSize(0.1);
212
213 // The rotation matrix elements
214 Float_t phi = 0;
215 for (isect = 0; isect < fgkNsect; isect++) {
216 phi = -2.0 * kPI / (Float_t) fgkNsect * ((Float_t) isect + 0.5);
217 fRotA11[isect] = TMath::Cos(phi);
218 fRotA12[isect] = TMath::Sin(phi);
219 fRotA21[isect] = TMath::Sin(phi);
220 fRotA22[isect] = TMath::Cos(phi);
221 phi = -1.0 * phi;
222 fRotB11[isect] = TMath::Cos(phi);
223 fRotB12[isect] = TMath::Sin(phi);
224 fRotB21[isect] = TMath::Sin(phi);
225 fRotB22[isect] = TMath::Cos(phi);
226 }
227
228}
229
230//_____________________________________________________________________________
231void AliTRDgeometry::SetColPadSize(Float_t size)
232{
233 //
234 // Redefines the pad size in column direction
235 //
236
237 fColPadSize = size;
238 for (Int_t iplan = 0; iplan < fgkNplan; iplan++) {
239 fColMax[iplan] = 1 + TMath::Nint((fCwidth[iplan] - 2. * fgkCcthick)
f7336fa3 240 / fColPadSize - 0.5);
793ff80c 241 fCol0[iplan] = -fCwidth[iplan]/2. + fgkCcthick;
f7336fa3 242 }
243
793ff80c 244}
245
246//_____________________________________________________________________________
247void AliTRDgeometry::SetTimeBinSize(Float_t size)
248{
249 //
250 // Redefines the time bin size
251 //
252
253 fTimeBinSize = size;
254 fTimeMax = 1 + TMath::Nint(fgkDrThick / fTimeBinSize - 0.5);
255 for (Int_t iplan = 0; iplan < fgkNplan; iplan++) {
256 fTime0[iplan] = fgkRmin + fgkCcframe/2. + fgkDrZpos + 0.5 * fgkDrThick
257 + iplan * (fgkCheight + fgkCspace);
258 }
f7336fa3 259
260}
261
262//_____________________________________________________________________________
263void AliTRDgeometry::CreateGeometry(Int_t *idtmed)
264{
265 //
266 // Create the TRD geometry
267 //
268 // Author: Christoph Blume (C.Blume@gsi.de) 20/07/99
269 //
270 // The volumes:
271 // TRD1-3 (Air) --- The TRD mother volumes for one sector.
272 // To be placed into the spaceframe.
273 //
274 // UAFI(/M/O) (Al) --- The aluminum frame of the inner(/middle/outer) chambers (readout)
275 // UCFI(/M/O) (C) --- The carbon frame of the inner(/middle/outer) chambers
276 // (driftchamber + radiator)
277 // UAII(/M/O) (Air) --- The inner part of the readout of the inner(/middle/outer) chambers
278 // UFII(/M/O) (Air) --- The inner part of the chamner and radiator of the
279 // inner(/middle/outer) chambers
280 //
281 // The material layers in one chamber:
282 // UL01 (G10) --- The gas seal of the radiator
283 // UL02 (CO2) --- The gas in the radiator
284 // UL03 (PE) --- The foil stack
285 // UL04 (Mylar) --- Entrance window to the driftvolume and HV-cathode
286 // UL05 (Xe) --- The driftvolume
287 // UL06 (Xe) --- The amplification region
288 //
289 // UL07 (Cu) --- The pad plane
290 // UL08 (G10) --- The Nomex honeycomb support structure
291 // UL09 (Cu) --- FEE and signal lines
292 // UL10 (PE) --- The cooling devices
293 // UL11 (Water) --- The cooling water
294
8230f242 295 const Int_t kNparCha = 3;
f7336fa3 296
8230f242 297 Float_t parDum[3];
298 Float_t parCha[kNparCha];
f7336fa3 299
300 Float_t xpos, ypos, zpos;
301
302 // The aluminum frames - readout + electronics (Al)
303 // The inner chambers
8230f242 304 gMC->Gsvolu("UAFI","BOX ",idtmed[1301-1],parDum,0);
f7336fa3 305 // The middle chambers
8230f242 306 gMC->Gsvolu("UAFM","BOX ",idtmed[1301-1],parDum,0);
f7336fa3 307 // The outer chambers
8230f242 308 gMC->Gsvolu("UAFO","BOX ",idtmed[1301-1],parDum,0);
f7336fa3 309
310 // The inner part of the aluminum frames (Air)
311 // The inner chambers
8230f242 312 gMC->Gsvolu("UAII","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 313 // The middle chambers
8230f242 314 gMC->Gsvolu("UAIM","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 315 // The outer chambers
8230f242 316 gMC->Gsvolu("UAIO","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 317
318 // The carbon frames - radiator + driftchamber (C)
319 // The inner chambers
8230f242 320 gMC->Gsvolu("UCFI","BOX ",idtmed[1307-1],parDum,0);
f7336fa3 321 // The middle chambers
8230f242 322 gMC->Gsvolu("UCFM","BOX ",idtmed[1307-1],parDum,0);
f7336fa3 323 // The outer chambers
8230f242 324 gMC->Gsvolu("UCFO","BOX ",idtmed[1307-1],parDum,0);
f7336fa3 325
326 // The inner part of the carbon frames (Air)
327 // The inner chambers
8230f242 328 gMC->Gsvolu("UCII","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 329 // The middle chambers
8230f242 330 gMC->Gsvolu("UCIM","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 331 // The outer chambers
8230f242 332 gMC->Gsvolu("UCIO","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 333
334 // The material layers inside the chambers
8230f242 335 parCha[0] = -1.;
336 parCha[1] = -1.;
f7336fa3 337 // G10 layer (radiator seal)
793ff80c 338 parCha[2] = fgkSeThick/2;
8230f242 339 gMC->Gsvolu("UL01","BOX ",idtmed[1313-1],parCha,kNparCha);
f7336fa3 340 // CO2 layer (radiator)
793ff80c 341 parCha[2] = fgkRaThick/2;
8230f242 342 gMC->Gsvolu("UL02","BOX ",idtmed[1312-1],parCha,kNparCha);
f7336fa3 343 // PE layer (radiator)
793ff80c 344 parCha[2] = fgkPeThick/2;
8230f242 345 gMC->Gsvolu("UL03","BOX ",idtmed[1303-1],parCha,kNparCha);
f7336fa3 346 // Mylar layer (entrance window + HV cathode)
793ff80c 347 parCha[2] = fgkMyThick/2;
8230f242 348 gMC->Gsvolu("UL04","BOX ",idtmed[1308-1],parCha,kNparCha);
f7336fa3 349 // Xe/Isobutane layer (drift volume, sensitive)
793ff80c 350 parCha[2] = fgkDrThick/2.;
8230f242 351 gMC->Gsvolu("UL05","BOX ",idtmed[1309-1],parCha,kNparCha);
f7336fa3 352 // Xe/Isobutane layer (amplification volume, not sensitive)
793ff80c 353 parCha[2] = fgkAmThick/2.;
8230f242 354 gMC->Gsvolu("UL06","BOX ",idtmed[1309-1],parCha,kNparCha);
f7336fa3 355
356 // Cu layer (pad plane)
793ff80c 357 parCha[2] = fgkCuThick/2;
8230f242 358 gMC->Gsvolu("UL07","BOX ",idtmed[1305-1],parCha,kNparCha);
f7336fa3 359 // G10 layer (support structure)
793ff80c 360 parCha[2] = fgkSuThick/2;
8230f242 361 gMC->Gsvolu("UL08","BOX ",idtmed[1313-1],parCha,kNparCha);
f7336fa3 362 // Cu layer (FEE + signal lines)
793ff80c 363 parCha[2] = fgkFeThick/2;
8230f242 364 gMC->Gsvolu("UL09","BOX ",idtmed[1305-1],parCha,kNparCha);
f7336fa3 365 // PE layer (cooling devices)
793ff80c 366 parCha[2] = fgkCoThick/2;
8230f242 367 gMC->Gsvolu("UL10","BOX ",idtmed[1303-1],parCha,kNparCha);
f7336fa3 368 // Water layer (cooling)
793ff80c 369 parCha[2] = fgkWaThick/2;
8230f242 370 gMC->Gsvolu("UL11","BOX ",idtmed[1314-1],parCha,kNparCha);
f7336fa3 371
372 // Position the layers in the chambers
373 xpos = 0;
374 ypos = 0;
375
376 // G10 layer (radiator seal)
793ff80c 377 zpos = fgkSeZpos;
f7336fa3 378 gMC->Gspos("UL01",1,"UCII",xpos,ypos,zpos,0,"ONLY");
379 gMC->Gspos("UL01",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
380 gMC->Gspos("UL01",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
381 // CO2 layer (radiator)
793ff80c 382 zpos = fgkRaZpos;
f7336fa3 383 gMC->Gspos("UL02",1,"UCII",xpos,ypos,zpos,0,"ONLY");
384 gMC->Gspos("UL02",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
385 gMC->Gspos("UL02",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
386 // PE layer (radiator)
387 zpos = 0;
388 gMC->Gspos("UL03",1,"UL02",xpos,ypos,zpos,0,"ONLY");
389 // Mylar layer (entrance window + HV cathode)
793ff80c 390 zpos = fgkMyZpos;
f7336fa3 391 gMC->Gspos("UL04",1,"UCII",xpos,ypos,zpos,0,"ONLY");
392 gMC->Gspos("UL04",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
393 gMC->Gspos("UL04",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
394 // Xe/Isobutane layer (drift volume)
793ff80c 395 zpos = fgkDrZpos;
f7336fa3 396 gMC->Gspos("UL05",1,"UCII",xpos,ypos,zpos,0,"ONLY");
397 gMC->Gspos("UL05",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
398 gMC->Gspos("UL05",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
399 // Xe/Isobutane layer (amplification volume)
793ff80c 400 zpos = fgkAmZpos;
f7336fa3 401 gMC->Gspos("UL06",1,"UCII",xpos,ypos,zpos,0,"ONLY");
402 gMC->Gspos("UL06",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
403 gMC->Gspos("UL06",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
404
405 // Cu layer (pad plane)
793ff80c 406 zpos = fgkCuZpos;
f7336fa3 407 gMC->Gspos("UL07",1,"UAII",xpos,ypos,zpos,0,"ONLY");
408 gMC->Gspos("UL07",2,"UAIM",xpos,ypos,zpos,0,"ONLY");
409 gMC->Gspos("UL07",3,"UAIO",xpos,ypos,zpos,0,"ONLY");
410 // G10 layer (support structure)
793ff80c 411 zpos = fgkSuZpos;
f7336fa3 412 gMC->Gspos("UL08",1,"UAII",xpos,ypos,zpos,0,"ONLY");
413 gMC->Gspos("UL08",2,"UAIM",xpos,ypos,zpos,0,"ONLY");
414 gMC->Gspos("UL08",3,"UAIO",xpos,ypos,zpos,0,"ONLY");
415 // Cu layer (FEE + signal lines)
793ff80c 416 zpos = fgkFeZpos;
f7336fa3 417 gMC->Gspos("UL09",1,"UAII",xpos,ypos,zpos,0,"ONLY");
418 gMC->Gspos("UL09",2,"UAIM",xpos,ypos,zpos,0,"ONLY");
419 gMC->Gspos("UL09",3,"UAIO",xpos,ypos,zpos,0,"ONLY");
420 // PE layer (cooling devices)
793ff80c 421 zpos = fgkCoZpos;
f7336fa3 422 gMC->Gspos("UL10",1,"UAII",xpos,ypos,zpos,0,"ONLY");
423 gMC->Gspos("UL10",2,"UAIM",xpos,ypos,zpos,0,"ONLY");
424 gMC->Gspos("UL10",3,"UAIO",xpos,ypos,zpos,0,"ONLY");
425 // Water layer (cooling)
793ff80c 426 zpos = fgkWaZpos;
f7336fa3 427 gMC->Gspos("UL11",1,"UAII",xpos,ypos,zpos,0,"ONLY");
428 gMC->Gspos("UL11",1,"UAIM",xpos,ypos,zpos,0,"ONLY");
429 gMC->Gspos("UL11",1,"UAIO",xpos,ypos,zpos,0,"ONLY");
430
431}
432
433//_____________________________________________________________________________
94de3818 434Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local, Float_t *global) const
f7336fa3 435{
436 //
437 // Converts local pad-coordinates (row,col,time) into
438 // global ALICE reference frame coordinates (x,y,z)
439 //
440
793ff80c 441 Int_t icham = GetChamber(idet); // Chamber info (0-4)
442 Int_t isect = GetSector(idet); // Sector info (0-17)
443 Int_t iplan = GetPlane(idet); // Plane info (0-5)
f7336fa3 444
6f1e466d 445 return Local2Global(iplan,icham,isect,local,global);
f7336fa3 446
447}
448
449//_____________________________________________________________________________
450Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
94de3818 451 , Float_t *local, Float_t *global) const
f7336fa3 452{
453 //
454 // Converts local pad-coordinates (row,col,time) into
455 // global ALICE reference frame coordinates (x,y,z)
456 //
457
793ff80c 458 Int_t idet = GetDetector(iplan,icham,isect); // Detector number
f7336fa3 459
793ff80c 460 Float_t padRow = local[0]; // Pad Row position
461 Float_t padCol = local[1]; // Pad Column position
462 Float_t timeSlice = local[2]; // Time "position"
f7336fa3 463
793ff80c 464 Float_t row0 = GetRow0(iplan,icham,isect);
465 Float_t col0 = GetCol0(iplan);
466 Float_t time0 = GetTime0(iplan);
f7336fa3 467
793ff80c 468 Float_t rot[3];
f7336fa3 469
470 // calculate (x,y,z) position in rotated chamber
f7336fa3 471 rot[0] = time0 + timeSlice * fTimeBinSize;
6f1e466d 472 rot[1] = col0 + padCol * fColPadSize;
f7336fa3 473 rot[2] = row0 + padRow * fRowPadSize;
474
475 // Rotate back to original position
476 return RotateBack(idet,rot,global);
477
478}
479
480//_____________________________________________________________________________
793ff80c 481Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t *pos, Float_t *rot) const
f7336fa3 482{
483 //
484 // Rotates all chambers in the position of sector 0 and transforms
485 // the coordinates in the ALICE restframe <pos> into the
486 // corresponding local frame <rot>.
487 //
488
793ff80c 489 Int_t sector = GetSector(d);
f7336fa3 490
793ff80c 491 rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
492 rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
f7336fa3 493 rot[2] = pos[2];
494
495 return kTRUE;
496
497}
498
499//_____________________________________________________________________________
94de3818 500Bool_t AliTRDgeometry::RotateBack(Int_t d, Float_t *rot, Float_t *pos) const
f7336fa3 501{
502 //
503 // Rotates a chambers from the position of sector 0 into its
504 // original position and transforms the corresponding local frame
505 // coordinates <rot> into the coordinates of the ALICE restframe <pos>.
506 //
507
793ff80c 508 Int_t sector = GetSector(d);
f7336fa3 509
793ff80c 510 pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
511 pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
6f1e466d 512 pos[2] = rot[2];
f7336fa3 513
514 return kTRUE;
515
516}
517
518//_____________________________________________________________________________
94de3818 519Int_t AliTRDgeometry::GetDetector(Int_t p, Int_t c, Int_t s) const
f7336fa3 520{
521 //
522 // Convert plane / chamber / sector into detector number
523 //
524
793ff80c 525 return (p + c * fgkNplan + s * fgkNplan * fgkNcham);
f7336fa3 526
527}
528
529//_____________________________________________________________________________
94de3818 530Int_t AliTRDgeometry::GetPlane(Int_t d) const
f7336fa3 531{
532 //
533 // Reconstruct the plane number from the detector number
534 //
535
793ff80c 536 return ((Int_t) (d % fgkNplan));
f7336fa3 537
538}
539
540//_____________________________________________________________________________
94de3818 541Int_t AliTRDgeometry::GetChamber(Int_t d) const
f7336fa3 542{
543 //
544 // Reconstruct the chamber number from the detector number
545 //
546
793ff80c 547 return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);
f7336fa3 548
549}
550
551//_____________________________________________________________________________
94de3818 552Int_t AliTRDgeometry::GetSector(Int_t d) const
f7336fa3 553{
554 //
555 // Reconstruct the sector number from the detector number
556 //
557
793ff80c 558 return ((Int_t) (d / (fgkNplan * fgkNcham)));
f7336fa3 559
560}
561
562//_____________________________________________________________________________
793ff80c 563void AliTRDgeometry::GetGlobal(const AliRecPoint *p, TVector3 &pos
564 , TMatrix &mat) const
f7336fa3 565{
566 //
567 // Returns the global coordinate and error matrix of a AliTRDrecPoint
568 //
569
570 GetGlobal(p,pos);
9d0b222b 571 mat.Zero();
f7336fa3 572
573}
574
575//_____________________________________________________________________________
94de3818 576void AliTRDgeometry::GetGlobal(const AliRecPoint *p, TVector3 &pos) const
f7336fa3 577{
578 //
579 // Returns the global coordinate and error matrix of a AliTRDrecPoint
580 //
581
582 Int_t detector = ((AliTRDrecPoint *) p)->GetDetector();
583
584 Float_t global[3];
585 Float_t local[3];
6f1e466d 586 local[0] = ((AliTRDrecPoint *) p)->GetLocalRow();
587 local[1] = ((AliTRDrecPoint *) p)->GetLocalCol();
588 local[2] = ((AliTRDrecPoint *) p)->GetLocalTime();
f7336fa3 589
590 if (Local2Global(detector,local,global)) {
591 pos.SetX(global[0]);
592 pos.SetY(global[1]);
593 pos.SetZ(global[2]);
594 }
595 else {
596 pos.SetX(0.0);
597 pos.SetY(0.0);
598 pos.SetZ(0.0);
599 }
600
601}