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Fix positions of cooling material
[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$Log$
52052b58 18Revision 1.12 2001/05/21 16:45:47 hristov
19Last minute changes (C.Blume)
20
db30bf0f 21Revision 1.11 2001/05/11 07:56:12 hristov
22Consistent declarations needed on Alpha
23
ff821236 24Revision 1.10 2001/05/07 08:08:05 cblume
25Update of TRD code
26
a2b90f83 27Revision 1.9 2001/03/27 12:48:33 cblume
28Correct for volume overlaps
29
b42a9f88 30Revision 1.8 2001/03/13 09:30:35 cblume
31Update of digitization. Moved digit branch definition to AliTRD
32
6244debe 33Revision 1.7 2001/02/14 18:22:26 cblume
34Change in the geometry of the padplane
35
71d9fa7b 36Revision 1.6 2000/11/01 14:53:20 cblume
37Merge with TRD-develop
38
793ff80c 39Revision 1.1.4.7 2000/10/16 01:16:53 cblume
40Changed timebin 0 to be the one closest to the readout
41
42Revision 1.1.4.6 2000/10/15 23:35:57 cblume
43Include geometry constants as static member
44
45Revision 1.1.4.5 2000/10/06 16:49:46 cblume
46Made Getters const
47
48Revision 1.1.4.4 2000/10/04 16:34:58 cblume
49Replace include files by forward declarations
50
51Revision 1.1.4.3 2000/09/22 14:43:40 cblume
52Allow the pad/timebin-dimensions to be changed after initialization
53
54Revision 1.1.4.2 2000/09/18 13:37:01 cblume
55Minor coding corrections
56
57Revision 1.5 2000/10/02 21:28:19 fca
58Removal of useless dependecies via forward declarations
59
60Revision 1.4 2000/06/08 18:32:58 cblume
61Make code compliant to coding conventions
62
63Revision 1.3 2000/06/07 16:25:37 cblume
64Try to remove compiler warnings on Sun and HP
65
66Revision 1.2 2000/05/08 16:17:27 cblume
67Merge TRD-develop
68
69Revision 1.1.4.1 2000/05/08 14:45:55 cblume
70Bug fix in RotateBack(). Geometry update
71
94de3818 72Revision 1.4 2000/06/08 18:32:58 cblume
73Make code compliant to coding conventions
74
8230f242 75Revision 1.3 2000/06/07 16:25:37 cblume
76Try to remove compiler warnings on Sun and HP
77
9d0b222b 78Revision 1.2 2000/05/08 16:17:27 cblume
79Merge TRD-develop
80
6f1e466d 81Revision 1.1.4.1 2000/05/08 14:45:55 cblume
82Bug fix in RotateBack(). Geometry update
83
84Revision 1.1 2000/02/28 19:00:44 cblume
85Add new TRD classes
86
f7336fa3 87*/
88
89///////////////////////////////////////////////////////////////////////////////
90// //
91// TRD geometry class //
92// //
93///////////////////////////////////////////////////////////////////////////////
94
793ff80c 95#include "AliMC.h"
96
f7336fa3 97#include "AliTRDgeometry.h"
98#include "AliTRDrecPoint.h"
94de3818 99#include "AliMC.h"
f7336fa3 100
101ClassImp(AliTRDgeometry)
102
793ff80c 103//_____________________________________________________________________________
104
105 //
106 // The geometry constants
107 //
108 const Int_t AliTRDgeometry::fgkNsect = kNsect;
109 const Int_t AliTRDgeometry::fgkNplan = kNplan;
110 const Int_t AliTRDgeometry::fgkNcham = kNcham;
111 const Int_t AliTRDgeometry::fgkNdet = kNdet;
112
113 //
114 // Dimensions of the detector
115 //
116 const Float_t AliTRDgeometry::fgkRmin = 294.0;
117 const Float_t AliTRDgeometry::fgkRmax = 368.0;
118
119 const Float_t AliTRDgeometry::fgkZmax1 = 378.35;
120 const Float_t AliTRDgeometry::fgkZmax2 = 302.0;
121
122 const Float_t AliTRDgeometry::fgkSheight = 74.0;
123 const Float_t AliTRDgeometry::fgkSwidth1 = 99.613;
124 const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
125 const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
126 const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5;
127 const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;
128
129 const Float_t AliTRDgeometry::fgkCheight = 11.0;
130 const Float_t AliTRDgeometry::fgkCspace = 1.6;
131 const Float_t AliTRDgeometry::fgkCathick = 1.0;
132 const Float_t AliTRDgeometry::fgkCcthick = 1.0;
133 const Float_t AliTRDgeometry::fgkCaframe = 2.675;
134 const Float_t AliTRDgeometry::fgkCcframe = AliTRDgeometry::fgkCheight
135 - AliTRDgeometry::fgkCaframe;
136
137 //
138 // Thickness of the the material layers
139 //
db30bf0f 140 const Float_t AliTRDgeometry::fgkRaThick = 0.3646;
793ff80c 141 const Float_t AliTRDgeometry::fgkMyThick = 0.005;
142 const Float_t AliTRDgeometry::fgkXeThick = 3.5;
143 const Float_t AliTRDgeometry::fgkDrThick = 3.0;
144 const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkXeThick
145 - AliTRDgeometry::fgkDrThick;
146 const Float_t AliTRDgeometry::fgkCuThick = 0.001;
147 const Float_t AliTRDgeometry::fgkSuThick = 0.06;
148 const Float_t AliTRDgeometry::fgkFeThick = 0.0044;
149 const Float_t AliTRDgeometry::fgkCoThick = 0.02;
db30bf0f 150//const Float_t AliTRDgeometry::fgkWaThick = 0.01;
151 const Float_t AliTRDgeometry::fgkWaThick = 0.02;
793ff80c 152
153 //
154 // Position of the material layers
155 //
b42a9f88 156 const Float_t AliTRDgeometry::fgkRaZpos = -1.74;
b42a9f88 157 const Float_t AliTRDgeometry::fgkMyZpos = 0.6550;
158 const Float_t AliTRDgeometry::fgkDrZpos = 2.1600;
159 const Float_t AliTRDgeometry::fgkAmZpos = 3.9100;
793ff80c 160 const Float_t AliTRDgeometry::fgkCuZpos = -1.3370;
161 const Float_t AliTRDgeometry::fgkSuZpos = 0.0000;
52052b58 162//const Float_t AliTRDgeometry::fgkFeZpos = 1.3053;
163//const Float_t AliTRDgeometry::fgkCoZpos = 1.3175;
164//const Float_t AliTRDgeometry::fgkWaZpos = 1.3325;
165 const Float_t AliTRDgeometry::fgkFeZpos = 1.2853;
166 const Float_t AliTRDgeometry::fgkCoZpos = 1.2975;
167 const Float_t AliTRDgeometry::fgkWaZpos = 1.3175;
793ff80c 168
f7336fa3 169//_____________________________________________________________________________
170AliTRDgeometry::AliTRDgeometry():AliGeometry()
171{
172 //
173 // AliTRDgeometry default constructor
174 //
175
176 Init();
177
178}
179
180//_____________________________________________________________________________
181AliTRDgeometry::~AliTRDgeometry()
182{
8230f242 183 //
184 // AliTRDgeometry destructor
185 //
f7336fa3 186
187}
188
189//_____________________________________________________________________________
190void AliTRDgeometry::Init()
191{
192 //
193 // Initializes the geometry parameter
194 //
195
793ff80c 196 Int_t isect;
f7336fa3 197
198 // The width of the chambers
793ff80c 199 fCwidth[0] = 99.6;
200 fCwidth[1] = 104.1;
201 fCwidth[2] = 108.5;
202 fCwidth[3] = 112.9;
203 fCwidth[4] = 117.4;
204 fCwidth[5] = 121.8;
f7336fa3 205
206 // The maximum number of pads
207 // and the position of pad 0,0,0
208 //
209 // chambers seen from the top:
210 // +----------------------------+
211 // | |
793ff80c 212 // | | ^
213 // | | rphi|
214 // | | |
215 // |0 | |
216 // +----------------------------+ +------>
f7336fa3 217 // z
793ff80c 218 // chambers seen from the side: ^
219 // +----------------------------+ drift|
220 // |0 | |
221 // | | |
222 // +----------------------------+ +------>
f7336fa3 223 // z
224 //
a2b90f83 225 // IMPORTANT: time bin 0 is now the first one in the drift region
226 // closest to the readout !!!
793ff80c 227 //
f7336fa3 228
229 // The pad column (rphi-direction)
71d9fa7b 230 SetNColPad(96);
793ff80c 231
a2b90f83 232 // The number of time bins. Default is 100 ns timbin size
6244debe 233 SetNTimeBin(15);
793ff80c 234
a2b90f83 235 // Additional time bins before and after the drift region.
236 // Default is to only sample the drift region
237 SetExpandTimeBin(0,0);
238
793ff80c 239 // The rotation matrix elements
240 Float_t phi = 0;
241 for (isect = 0; isect < fgkNsect; isect++) {
242 phi = -2.0 * kPI / (Float_t) fgkNsect * ((Float_t) isect + 0.5);
243 fRotA11[isect] = TMath::Cos(phi);
244 fRotA12[isect] = TMath::Sin(phi);
245 fRotA21[isect] = TMath::Sin(phi);
246 fRotA22[isect] = TMath::Cos(phi);
247 phi = -1.0 * phi;
248 fRotB11[isect] = TMath::Cos(phi);
249 fRotB12[isect] = TMath::Sin(phi);
250 fRotB21[isect] = TMath::Sin(phi);
251 fRotB22[isect] = TMath::Cos(phi);
252 }
253
254}
255
256//_____________________________________________________________________________
a2b90f83 257void AliTRDgeometry::SetNColPad(const Int_t npad)
793ff80c 258{
259 //
71d9fa7b 260 // Redefines the number of pads in column direction
793ff80c 261 //
262
793ff80c 263 for (Int_t iplan = 0; iplan < fgkNplan; iplan++) {
71d9fa7b 264 fColMax[iplan] = npad;
265 fColPadSize[iplan] = (fCwidth[iplan] - 2. * fgkCcthick) / fColMax[iplan];
266 fCol0[iplan] = -fCwidth[iplan]/2. + fgkCcthick;
f7336fa3 267 }
268
793ff80c 269}
270
271//_____________________________________________________________________________
a2b90f83 272void AliTRDgeometry::SetNTimeBin(const Int_t nbin)
793ff80c 273{
274 //
a2b90f83 275 // Redefines the number of time bins in the drift region.
276 // The time bin width is defined by the length of the
277 // drift region divided by <nbin>.
793ff80c 278 //
279
71d9fa7b 280 fTimeMax = nbin;
281 fTimeBinSize = fgkDrThick / ((Float_t) fTimeMax);
793ff80c 282 for (Int_t iplan = 0; iplan < fgkNplan; iplan++) {
283 fTime0[iplan] = fgkRmin + fgkCcframe/2. + fgkDrZpos + 0.5 * fgkDrThick
284 + iplan * (fgkCheight + fgkCspace);
285 }
f7336fa3 286
287}
288
289//_____________________________________________________________________________
290void AliTRDgeometry::CreateGeometry(Int_t *idtmed)
291{
292 //
293 // Create the TRD geometry
294 //
295 // Author: Christoph Blume (C.Blume@gsi.de) 20/07/99
296 //
297 // The volumes:
298 // TRD1-3 (Air) --- The TRD mother volumes for one sector.
299 // To be placed into the spaceframe.
300 //
301 // UAFI(/M/O) (Al) --- The aluminum frame of the inner(/middle/outer) chambers (readout)
302 // UCFI(/M/O) (C) --- The carbon frame of the inner(/middle/outer) chambers
303 // (driftchamber + radiator)
304 // UAII(/M/O) (Air) --- The inner part of the readout of the inner(/middle/outer) chambers
305 // UFII(/M/O) (Air) --- The inner part of the chamner and radiator of the
306 // inner(/middle/outer) chambers
307 //
308 // The material layers in one chamber:
db30bf0f 309 // UL03 (Rohacell) --- The radiator
310 // UL04 (Mylar) --- Entrance window to the driftvolume and HV-cathode
311 // UL05 (Xe) --- The driftvolume
312 // UL06 (Xe) --- The amplification region
f7336fa3 313 //
db30bf0f 314 // UL07 (Cu) --- The pad plane
315 // UL08 (G10) --- The Nomex honeycomb support structure
316 // UL09 (Cu) --- FEE and signal lines
317 // UL10 (Al) --- The cooling devices
318 // UL11 (Water) --- The cooling water
f7336fa3 319
8230f242 320 const Int_t kNparCha = 3;
f7336fa3 321
8230f242 322 Float_t parDum[3];
323 Float_t parCha[kNparCha];
f7336fa3 324
325 Float_t xpos, ypos, zpos;
326
327 // The aluminum frames - readout + electronics (Al)
328 // The inner chambers
8230f242 329 gMC->Gsvolu("UAFI","BOX ",idtmed[1301-1],parDum,0);
f7336fa3 330 // The middle chambers
8230f242 331 gMC->Gsvolu("UAFM","BOX ",idtmed[1301-1],parDum,0);
f7336fa3 332 // The outer chambers
8230f242 333 gMC->Gsvolu("UAFO","BOX ",idtmed[1301-1],parDum,0);
f7336fa3 334
335 // The inner part of the aluminum frames (Air)
336 // The inner chambers
8230f242 337 gMC->Gsvolu("UAII","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 338 // The middle chambers
8230f242 339 gMC->Gsvolu("UAIM","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 340 // The outer chambers
8230f242 341 gMC->Gsvolu("UAIO","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 342
343 // The carbon frames - radiator + driftchamber (C)
344 // The inner chambers
8230f242 345 gMC->Gsvolu("UCFI","BOX ",idtmed[1307-1],parDum,0);
f7336fa3 346 // The middle chambers
8230f242 347 gMC->Gsvolu("UCFM","BOX ",idtmed[1307-1],parDum,0);
f7336fa3 348 // The outer chambers
8230f242 349 gMC->Gsvolu("UCFO","BOX ",idtmed[1307-1],parDum,0);
f7336fa3 350
351 // The inner part of the carbon frames (Air)
352 // The inner chambers
8230f242 353 gMC->Gsvolu("UCII","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 354 // The middle chambers
8230f242 355 gMC->Gsvolu("UCIM","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 356 // The outer chambers
8230f242 357 gMC->Gsvolu("UCIO","BOX ",idtmed[1302-1],parDum,0);
f7336fa3 358
359 // The material layers inside the chambers
8230f242 360 parCha[0] = -1.;
361 parCha[1] = -1.;
db30bf0f 362 // Rohacell layer (radiator)
793ff80c 363 parCha[2] = fgkRaThick/2;
db30bf0f 364 gMC->Gsvolu("UL03","BOX ",idtmed[1315-1],parCha,kNparCha);
f7336fa3 365 // Mylar layer (entrance window + HV cathode)
793ff80c 366 parCha[2] = fgkMyThick/2;
8230f242 367 gMC->Gsvolu("UL04","BOX ",idtmed[1308-1],parCha,kNparCha);
db30bf0f 368 // Xe/Isobutane layer (drift volume)
793ff80c 369 parCha[2] = fgkDrThick/2.;
8230f242 370 gMC->Gsvolu("UL05","BOX ",idtmed[1309-1],parCha,kNparCha);
db30bf0f 371 // Xe/Isobutane layer (amplification volume)
793ff80c 372 parCha[2] = fgkAmThick/2.;
8230f242 373 gMC->Gsvolu("UL06","BOX ",idtmed[1309-1],parCha,kNparCha);
f7336fa3 374
375 // Cu layer (pad plane)
793ff80c 376 parCha[2] = fgkCuThick/2;
8230f242 377 gMC->Gsvolu("UL07","BOX ",idtmed[1305-1],parCha,kNparCha);
f7336fa3 378 // G10 layer (support structure)
793ff80c 379 parCha[2] = fgkSuThick/2;
8230f242 380 gMC->Gsvolu("UL08","BOX ",idtmed[1313-1],parCha,kNparCha);
f7336fa3 381 // Cu layer (FEE + signal lines)
793ff80c 382 parCha[2] = fgkFeThick/2;
8230f242 383 gMC->Gsvolu("UL09","BOX ",idtmed[1305-1],parCha,kNparCha);
db30bf0f 384 // Al layer (cooling devices)
793ff80c 385 parCha[2] = fgkCoThick/2;
db30bf0f 386 gMC->Gsvolu("UL10","BOX ",idtmed[1301-1],parCha,kNparCha);
f7336fa3 387 // Water layer (cooling)
793ff80c 388 parCha[2] = fgkWaThick/2;
8230f242 389 gMC->Gsvolu("UL11","BOX ",idtmed[1314-1],parCha,kNparCha);
f7336fa3 390
391 // Position the layers in the chambers
392 xpos = 0;
393 ypos = 0;
394
db30bf0f 395 // Rohacell layer (radiator)
793ff80c 396 zpos = fgkRaZpos;
db30bf0f 397 gMC->Gspos("UL03",1,"UCII",xpos,ypos,zpos,0,"ONLY");
398 gMC->Gspos("UL03",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
399 gMC->Gspos("UL03",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
f7336fa3 400 // Mylar layer (entrance window + HV cathode)
793ff80c 401 zpos = fgkMyZpos;
f7336fa3 402 gMC->Gspos("UL04",1,"UCII",xpos,ypos,zpos,0,"ONLY");
403 gMC->Gspos("UL04",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
404 gMC->Gspos("UL04",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
405 // Xe/Isobutane layer (drift volume)
793ff80c 406 zpos = fgkDrZpos;
f7336fa3 407 gMC->Gspos("UL05",1,"UCII",xpos,ypos,zpos,0,"ONLY");
408 gMC->Gspos("UL05",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
409 gMC->Gspos("UL05",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
410 // Xe/Isobutane layer (amplification volume)
793ff80c 411 zpos = fgkAmZpos;
f7336fa3 412 gMC->Gspos("UL06",1,"UCII",xpos,ypos,zpos,0,"ONLY");
413 gMC->Gspos("UL06",2,"UCIM",xpos,ypos,zpos,0,"ONLY");
414 gMC->Gspos("UL06",3,"UCIO",xpos,ypos,zpos,0,"ONLY");
f7336fa3 415 // Cu layer (pad plane)
793ff80c 416 zpos = fgkCuZpos;
f7336fa3 417 gMC->Gspos("UL07",1,"UAII",xpos,ypos,zpos,0,"ONLY");
418 gMC->Gspos("UL07",2,"UAIM",xpos,ypos,zpos,0,"ONLY");
419 gMC->Gspos("UL07",3,"UAIO",xpos,ypos,zpos,0,"ONLY");
420 // G10 layer (support structure)
793ff80c 421 zpos = fgkSuZpos;
f7336fa3 422 gMC->Gspos("UL08",1,"UAII",xpos,ypos,zpos,0,"ONLY");
423 gMC->Gspos("UL08",2,"UAIM",xpos,ypos,zpos,0,"ONLY");
424 gMC->Gspos("UL08",3,"UAIO",xpos,ypos,zpos,0,"ONLY");
425 // Cu layer (FEE + signal lines)
793ff80c 426 zpos = fgkFeZpos;
f7336fa3 427 gMC->Gspos("UL09",1,"UAII",xpos,ypos,zpos,0,"ONLY");
428 gMC->Gspos("UL09",2,"UAIM",xpos,ypos,zpos,0,"ONLY");
429 gMC->Gspos("UL09",3,"UAIO",xpos,ypos,zpos,0,"ONLY");
db30bf0f 430 // Al layer (cooling devices)
793ff80c 431 zpos = fgkCoZpos;
f7336fa3 432 gMC->Gspos("UL10",1,"UAII",xpos,ypos,zpos,0,"ONLY");
433 gMC->Gspos("UL10",2,"UAIM",xpos,ypos,zpos,0,"ONLY");
434 gMC->Gspos("UL10",3,"UAIO",xpos,ypos,zpos,0,"ONLY");
435 // Water layer (cooling)
793ff80c 436 zpos = fgkWaZpos;
f7336fa3 437 gMC->Gspos("UL11",1,"UAII",xpos,ypos,zpos,0,"ONLY");
438 gMC->Gspos("UL11",1,"UAIM",xpos,ypos,zpos,0,"ONLY");
439 gMC->Gspos("UL11",1,"UAIO",xpos,ypos,zpos,0,"ONLY");
440
441}
442
443//_____________________________________________________________________________
94de3818 444Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local, Float_t *global) const
f7336fa3 445{
446 //
447 // Converts local pad-coordinates (row,col,time) into
448 // global ALICE reference frame coordinates (x,y,z)
449 //
450
793ff80c 451 Int_t icham = GetChamber(idet); // Chamber info (0-4)
452 Int_t isect = GetSector(idet); // Sector info (0-17)
453 Int_t iplan = GetPlane(idet); // Plane info (0-5)
f7336fa3 454
6f1e466d 455 return Local2Global(iplan,icham,isect,local,global);
f7336fa3 456
457}
458
459//_____________________________________________________________________________
460Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
94de3818 461 , Float_t *local, Float_t *global) const
f7336fa3 462{
463 //
464 // Converts local pad-coordinates (row,col,time) into
465 // global ALICE reference frame coordinates (x,y,z)
466 //
467
793ff80c 468 Int_t idet = GetDetector(iplan,icham,isect); // Detector number
f7336fa3 469
793ff80c 470 Float_t padRow = local[0]; // Pad Row position
471 Float_t padCol = local[1]; // Pad Column position
472 Float_t timeSlice = local[2]; // Time "position"
f7336fa3 473
793ff80c 474 Float_t row0 = GetRow0(iplan,icham,isect);
475 Float_t col0 = GetCol0(iplan);
476 Float_t time0 = GetTime0(iplan);
f7336fa3 477
793ff80c 478 Float_t rot[3];
f7336fa3 479
480 // calculate (x,y,z) position in rotated chamber
a2b90f83 481 rot[0] = time0 - (timeSlice - fTimeBefore) * fTimeBinSize;
482 rot[1] = col0 + padCol * fColPadSize[iplan];
483 rot[2] = row0 + padRow * fRowPadSize[iplan][icham][isect];
f7336fa3 484
485 // Rotate back to original position
486 return RotateBack(idet,rot,global);
487
488}
489
490//_____________________________________________________________________________
793ff80c 491Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t *pos, Float_t *rot) const
f7336fa3 492{
493 //
494 // Rotates all chambers in the position of sector 0 and transforms
495 // the coordinates in the ALICE restframe <pos> into the
496 // corresponding local frame <rot>.
497 //
498
793ff80c 499 Int_t sector = GetSector(d);
f7336fa3 500
793ff80c 501 rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
502 rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
f7336fa3 503 rot[2] = pos[2];
504
505 return kTRUE;
506
507}
508
509//_____________________________________________________________________________
94de3818 510Bool_t AliTRDgeometry::RotateBack(Int_t d, Float_t *rot, Float_t *pos) const
f7336fa3 511{
512 //
513 // Rotates a chambers from the position of sector 0 into its
514 // original position and transforms the corresponding local frame
515 // coordinates <rot> into the coordinates of the ALICE restframe <pos>.
516 //
517
793ff80c 518 Int_t sector = GetSector(d);
f7336fa3 519
793ff80c 520 pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
521 pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
6f1e466d 522 pos[2] = rot[2];
f7336fa3 523
524 return kTRUE;
525
526}
527
528//_____________________________________________________________________________
ff821236 529Int_t AliTRDgeometry::GetDetector(const Int_t p, const Int_t c, const Int_t s) const
f7336fa3 530{
531 //
532 // Convert plane / chamber / sector into detector number
533 //
534
793ff80c 535 return (p + c * fgkNplan + s * fgkNplan * fgkNcham);
f7336fa3 536
537}
538
539//_____________________________________________________________________________
ff821236 540Int_t AliTRDgeometry::GetPlane(const Int_t d) const
f7336fa3 541{
542 //
543 // Reconstruct the plane number from the detector number
544 //
545
793ff80c 546 return ((Int_t) (d % fgkNplan));
f7336fa3 547
548}
549
550//_____________________________________________________________________________
ff821236 551Int_t AliTRDgeometry::GetChamber(const Int_t d) const
f7336fa3 552{
553 //
554 // Reconstruct the chamber number from the detector number
555 //
556
793ff80c 557 return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);
f7336fa3 558
559}
560
561//_____________________________________________________________________________
ff821236 562Int_t AliTRDgeometry::GetSector(const Int_t d) const
f7336fa3 563{
564 //
565 // Reconstruct the sector number from the detector number
566 //
567
793ff80c 568 return ((Int_t) (d / (fgkNplan * fgkNcham)));
f7336fa3 569
570}
571
572//_____________________________________________________________________________
793ff80c 573void AliTRDgeometry::GetGlobal(const AliRecPoint *p, TVector3 &pos
574 , TMatrix &mat) const
f7336fa3 575{
576 //
577 // Returns the global coordinate and error matrix of a AliTRDrecPoint
578 //
579
580 GetGlobal(p,pos);
9d0b222b 581 mat.Zero();
f7336fa3 582
583}
584
585//_____________________________________________________________________________
94de3818 586void AliTRDgeometry::GetGlobal(const AliRecPoint *p, TVector3 &pos) const
f7336fa3 587{
588 //
589 // Returns the global coordinate and error matrix of a AliTRDrecPoint
590 //
591
592 Int_t detector = ((AliTRDrecPoint *) p)->GetDetector();
593
594 Float_t global[3];
595 Float_t local[3];
6f1e466d 596 local[0] = ((AliTRDrecPoint *) p)->GetLocalRow();
597 local[1] = ((AliTRDrecPoint *) p)->GetLocalCol();
598 local[2] = ((AliTRDrecPoint *) p)->GetLocalTime();
f7336fa3 599
600 if (Local2Global(detector,local,global)) {
601 pos.SetX(global[0]);
602 pos.SetY(global[1]);
603 pos.SetZ(global[2]);
604 }
605 else {
606 pos.SetX(0.0);
607 pos.SetY(0.0);
608 pos.SetZ(0.0);
609 }
610
611}