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Removed unused data members and methods
[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
afc51ac2 16/* $Id$ */
f7336fa3 17
18///////////////////////////////////////////////////////////////////////////////
19// //
20// TRD geometry class //
21// //
22///////////////////////////////////////////////////////////////////////////////
23
793ff80c 24
f7336fa3 25#include "AliTRDgeometry.h"
5443e65e 26#include "AliTRDparameter.h"
f7336fa3 27
28ClassImp(AliTRDgeometry)
29
793ff80c 30//_____________________________________________________________________________
31
32 //
33 // The geometry constants
34 //
35 const Int_t AliTRDgeometry::fgkNsect = kNsect;
36 const Int_t AliTRDgeometry::fgkNplan = kNplan;
37 const Int_t AliTRDgeometry::fgkNcham = kNcham;
38 const Int_t AliTRDgeometry::fgkNdet = kNdet;
39
40 //
41 // Dimensions of the detector
42 //
0a770ac9 43
44 // Inner and outer radius of the mother volumes
793ff80c 45 const Float_t AliTRDgeometry::fgkRmin = 294.0;
46 const Float_t AliTRDgeometry::fgkRmax = 368.0;
47
0a770ac9 48 // Upper and lower length of the mother volumes
793ff80c 49 const Float_t AliTRDgeometry::fgkZmax1 = 378.35;
50 const Float_t AliTRDgeometry::fgkZmax2 = 302.0;
51
0a770ac9 52 // Parameter of the BTR mother volumes
793ff80c 53 const Float_t AliTRDgeometry::fgkSheight = 74.0;
54 const Float_t AliTRDgeometry::fgkSwidth1 = 99.613;
55 const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
56 const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
57 const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5;
58 const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;
59
73ae7b59 60 // The super module side plates
61 const Float_t AliTRDgeometry::fgkSMpltT = 0.2;
62 const Float_t AliTRDgeometry::fgkSMgapT = 0.5;
63
0a770ac9 64 // Height of different chamber parts
65 // Radiator
66 const Float_t AliTRDgeometry::fgkCraH = 4.8;
67 // Drift region
68 const Float_t AliTRDgeometry::fgkCdrH = 3.0;
69 // Amplification region
70 const Float_t AliTRDgeometry::fgkCamH = 0.7;
71 // Readout
73ae7b59 72 const Float_t AliTRDgeometry::fgkCroH = 2.316;
0a770ac9 73 // Total height
74 const Float_t AliTRDgeometry::fgkCH = AliTRDgeometry::fgkCraH
75 + AliTRDgeometry::fgkCdrH
76 + AliTRDgeometry::fgkCamH
77 + AliTRDgeometry::fgkCroH;
78
79 // Vertical spacing of the chambers
73ae7b59 80 const Float_t AliTRDgeometry::fgkVspace = 1.784;
0a770ac9 81
82 // Horizontal spacing of the chambers
83 const Float_t AliTRDgeometry::fgkHspace = 2.0;
84
85 // Thicknesses of different parts of the chamber frame
86 // Lower aluminum frame
87 const Float_t AliTRDgeometry::fgkCalT = 0.3;
88 // Lower G10 frame sides
89 const Float_t AliTRDgeometry::fgkCclsT = 0.3;
90 // Lower G10 frame front
91 const Float_t AliTRDgeometry::fgkCclfT = 1.0;
92 // Upper G10 frame
93 const Float_t AliTRDgeometry::fgkCcuT = 0.9;
94 // Upper Al frame
95 const Float_t AliTRDgeometry::fgkCauT = 1.5;
96
97 // Additional width of the readout chamber frames
98 const Float_t AliTRDgeometry::fgkCroW = 0.9;
99
100 // Difference of outer chamber width and pad plane width
73ae7b59 101 //const Float_t AliTRDgeometry::fgkCpadW = 1.0;
102 const Float_t AliTRDgeometry::fgkCpadW = 0.0;
de6df1b1 103 const Float_t AliTRDgeometry::fgkRpadW = 1.0;
793ff80c 104
105 //
106 // Thickness of the the material layers
107 //
db30bf0f 108 const Float_t AliTRDgeometry::fgkRaThick = 0.3646;
793ff80c 109 const Float_t AliTRDgeometry::fgkMyThick = 0.005;
0a770ac9 110 const Float_t AliTRDgeometry::fgkDrThick = AliTRDgeometry::fgkCdrH;
111 const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkCamH;
112 const Float_t AliTRDgeometry::fgkXeThick = AliTRDgeometry::fgkDrThick
113 + AliTRDgeometry::fgkAmThick;
793ff80c 114 const Float_t AliTRDgeometry::fgkCuThick = 0.001;
115 const Float_t AliTRDgeometry::fgkSuThick = 0.06;
116 const Float_t AliTRDgeometry::fgkFeThick = 0.0044;
117 const Float_t AliTRDgeometry::fgkCoThick = 0.02;
db30bf0f 118 const Float_t AliTRDgeometry::fgkWaThick = 0.02;
793ff80c 119
120 //
121 // Position of the material layers
122 //
0a770ac9 123 const Float_t AliTRDgeometry::fgkRaZpos = -1.50;
124 const Float_t AliTRDgeometry::fgkMyZpos = 0.895;
125 const Float_t AliTRDgeometry::fgkDrZpos = 2.4;
126 const Float_t AliTRDgeometry::fgkAmZpos = 0.0;
127 const Float_t AliTRDgeometry::fgkCuZpos = -0.9995;
793ff80c 128 const Float_t AliTRDgeometry::fgkSuZpos = 0.0000;
0a770ac9 129 const Float_t AliTRDgeometry::fgkFeZpos = 0.0322;
130 const Float_t AliTRDgeometry::fgkCoZpos = 0.97;
131 const Float_t AliTRDgeometry::fgkWaZpos = 0.99;
793ff80c 132
f7336fa3 133//_____________________________________________________________________________
134AliTRDgeometry::AliTRDgeometry():AliGeometry()
135{
136 //
137 // AliTRDgeometry default constructor
138 //
139
140 Init();
141
142}
143
144//_____________________________________________________________________________
145AliTRDgeometry::~AliTRDgeometry()
146{
8230f242 147 //
148 // AliTRDgeometry destructor
149 //
f7336fa3 150
151}
152
153//_____________________________________________________________________________
154void AliTRDgeometry::Init()
155{
156 //
157 // Initializes the geometry parameter
158 //
f7336fa3 159 // The maximum number of pads
160 // and the position of pad 0,0,0
161 //
162 // chambers seen from the top:
163 // +----------------------------+
164 // | |
793ff80c 165 // | | ^
166 // | | rphi|
167 // | | |
168 // |0 | |
169 // +----------------------------+ +------>
f7336fa3 170 // z
793ff80c 171 // chambers seen from the side: ^
172 // +----------------------------+ drift|
173 // |0 | |
174 // | | |
175 // +----------------------------+ +------>
f7336fa3 176 // z
177 //
a2b90f83 178 // IMPORTANT: time bin 0 is now the first one in the drift region
179 // closest to the readout !!!
793ff80c 180 //
f7336fa3 181
0a770ac9 182 Int_t icham;
183 Int_t iplan;
184 Int_t isect;
185
186 // The outer width of the chambers
73ae7b59 187 fCwidth[0] = 94.8;
188 fCwidth[1] = 99.3;
189 fCwidth[2] = 103.7;
190 fCwidth[3] = 108.1;
191 fCwidth[4] = 112.6;
192 fCwidth[5] = 117.0;
0a770ac9 193
194 // The outer lengths of the chambers
73ae7b59 195 // Includes the spacings between the chambers!
8737e16f 196 Float_t length[kNplan][kNcham] = { { 124.0, 124.0, 110.0, 124.0, 124.0 }
197 , { 131.0, 131.0, 110.0, 131.0, 131.0 }
198 , { 138.0, 138.0, 110.0, 138.0, 138.0 }
199 , { 145.0, 145.0, 110.0, 145.0, 145.0 }
200 , { 147.0, 147.0, 110.0, 147.0, 147.0 }
201 , { 147.0, 147.0, 110.0, 147.0, 147.0 } };
0a770ac9 202
203 for (icham = 0; icham < kNcham; icham++) {
204 for (iplan = 0; iplan < kNplan; iplan++) {
205 fClength[iplan][icham] = length[iplan][icham];
206 fClengthPH[iplan][icham] = 0.0;
207 fClengthRH[iplan][icham] = 0.0;
208 }
209 }
210
793ff80c 211 // The rotation matrix elements
212 Float_t phi = 0;
213 for (isect = 0; isect < fgkNsect; isect++) {
5443e65e 214 phi = -2.0 * TMath::Pi() / (Float_t) fgkNsect * ((Float_t) isect + 0.5);
793ff80c 215 fRotA11[isect] = TMath::Cos(phi);
216 fRotA12[isect] = TMath::Sin(phi);
217 fRotA21[isect] = TMath::Sin(phi);
218 fRotA22[isect] = TMath::Cos(phi);
219 phi = -1.0 * phi;
220 fRotB11[isect] = TMath::Cos(phi);
221 fRotB12[isect] = TMath::Sin(phi);
222 fRotB21[isect] = TMath::Sin(phi);
223 fRotB22[isect] = TMath::Cos(phi);
224 }
225
226}
227
f7336fa3 228//_____________________________________________________________________________
73ae7b59 229void AliTRDgeometry::CreateGeometry(Int_t* )
f7336fa3 230{
231 //
0a770ac9 232 // Create TRD geometry
233 //
f7336fa3 234
235}
236
237//_____________________________________________________________________________
5443e65e 238Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local
239 , Float_t *global
240 , AliTRDparameter *par) const
f7336fa3 241{
242 //
243 // Converts local pad-coordinates (row,col,time) into
244 // global ALICE reference frame coordinates (x,y,z)
245 //
246
793ff80c 247 Int_t icham = GetChamber(idet); // Chamber info (0-4)
248 Int_t isect = GetSector(idet); // Sector info (0-17)
249 Int_t iplan = GetPlane(idet); // Plane info (0-5)
f7336fa3 250
5443e65e 251 return Local2Global(iplan,icham,isect,local,global,par);
f7336fa3 252
253}
254
255//_____________________________________________________________________________
256Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
5443e65e 257 , Float_t *local, Float_t *global
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
5443e65e 265 if (!par) {
266 Error("Local2Global","No parameter defined\n");
267 return kFALSE;
268 }
269
793ff80c 270 Int_t idet = GetDetector(iplan,icham,isect); // Detector number
f7336fa3 271
16bf9884 272 Float_t padRow = local[0]+0.5; // Pad Row position
273 Float_t padCol = local[1]+0.5; // Pad Column position
274 Float_t timeSlice = local[2]+0.5; // Time "position"
f7336fa3 275
5443e65e 276 Float_t row0 = par->GetRow0(iplan,icham,isect);
277 Float_t col0 = par->GetCol0(iplan);
278 Float_t time0 = par->GetTime0(iplan);
f7336fa3 279
793ff80c 280 Float_t rot[3];
f7336fa3 281
282 // calculate (x,y,z) position in rotated chamber
5443e65e 283 rot[0] = time0 - (timeSlice - par->GetTimeBefore())
284 * par->GetTimeBinSize();
285 rot[1] = col0 + padCol
286 * par->GetColPadSize(iplan);
287 rot[2] = row0 + padRow
288 * par->GetRowPadSize(iplan,icham,isect);
f7336fa3 289
290 // Rotate back to original position
291 return RotateBack(idet,rot,global);
292
293}
294
3d7b6a24 295
296
297//_____________________________________________________________________________
298Bool_t AliTRDgeometry::Global2Local(Int_t mode, Float_t *local, Float_t *global, Int_t* index, AliTRDparameter *par) const
299{
300 //
301 // Converts local pad-coordinates (row,col,time) into
302 // global ALICE reference frame coordinates (x,y,z)
303 //
304 //index[0]=plane number
305 //index[1]=chamber number
306 //index[2]=sector number
307 //
308 // mode=0 - local coordinate in y, z, x - rotated global
309 // mode=2 - local coordinate in pad, and pad row, x - rotated global
310 //
311 if (!par) {
312 Error("Local2Global","No parameter defined\n");
313 return kFALSE;
314 }
315
316 //Int_t idet = GetDetector(iplan,icham,isect); // Detector number
317 Int_t idet = GetDetector(index[0],index[1],index[2]); // Detector number
318 Rotate(idet,global,local);
319 if (mode==0) return kTRUE;
320 //
321 // Float_t row0 = par->GetRow0(iplan,icham,isect);
322 //Float_t col0 = par->GetCol0(iplan);
323 //Float_t time0 = par->GetTime0(iplan);
324 //
325 // mode 1 to be implemented later
326 // calculate (x,y,z) position in time bin pad row pad
327 //
328 //rot[0] = time0 - (timeSlice - par->GetTimeBefore())
329 // * par->GetTimeBinSize();
330 //rot[1] = col0 + padCol
331 // * par->GetColPadSize(iplan);
332 //rot[2] = row0 + padRow
333 // * par->GetRowPadSize(iplan,icham,isect);
334
335 return kTRUE;
336
337}
338
339//___________________________________________________________________
340Bool_t AliTRDgeometry::Global2Detector(Float_t global[3], Int_t index[3], AliTRDparameter *par)
341{
342 //
343 //
344 //input = global position
345 //output =index
346 //index[0]=plane number
347 //index[1]=chamber number
348 //index[2]=sector number
349 Float_t fi;
350 //
351 fi = TMath::ATan2(global[1],global[0]);
352 if (fi<0) fi += 2*TMath::Pi();
353 index[2] = Int_t(TMath::Nint((fi - GetAlpha()/2.)/GetAlpha()));
354 //
355 //
356 Float_t locx = global[0] * fRotA11[index[2]] + global[1] * fRotA12[index[2]];
357 index[0] = 0;
358 Float_t max = locx-par->GetTime0(0);
359 for (Int_t iplane=1; iplane<fgkNplan;iplane++){
360 Float_t dist = TMath::Abs(locx-par->GetTime0(iplane));
361 if (dist < max){
362 index[0] = iplane;
363 max = dist;
364 }
365 }
366 Float_t theta = TMath::ATan2(global[2],locx);
367 index[1] = TMath::Nint(float(fgkNcham)*theta/(0.25*TMath::Pi()));
368 return kTRUE;
369
370}
371
372
f7336fa3 373//_____________________________________________________________________________
793ff80c 374Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t *pos, Float_t *rot) const
f7336fa3 375{
376 //
377 // Rotates all chambers in the position of sector 0 and transforms
378 // the coordinates in the ALICE restframe <pos> into the
379 // corresponding local frame <rot>.
380 //
381
793ff80c 382 Int_t sector = GetSector(d);
f7336fa3 383
793ff80c 384 rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
385 rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
f7336fa3 386 rot[2] = pos[2];
387
388 return kTRUE;
389
390}
391
392//_____________________________________________________________________________
94de3818 393Bool_t AliTRDgeometry::RotateBack(Int_t d, Float_t *rot, Float_t *pos) const
f7336fa3 394{
395 //
396 // Rotates a chambers from the position of sector 0 into its
397 // original position and transforms the corresponding local frame
398 // coordinates <rot> into the coordinates of the ALICE restframe <pos>.
399 //
400
793ff80c 401 Int_t sector = GetSector(d);
f7336fa3 402
793ff80c 403 pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
404 pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
6f1e466d 405 pos[2] = rot[2];
f7336fa3 406
407 return kTRUE;
408
409}
410
411//_____________________________________________________________________________
afc51ac2 412Int_t AliTRDgeometry::GetDetectorSec(Int_t p, Int_t c) const
0a770ac9 413{
414 //
415 // Convert plane / chamber into detector number for one single sector
416 //
417
418 return (p + c * fgkNplan);
419
420}
421
422//_____________________________________________________________________________
afc51ac2 423Int_t AliTRDgeometry::GetDetector(Int_t p, Int_t c, Int_t s) const
f7336fa3 424{
425 //
426 // Convert plane / chamber / sector into detector number
427 //
428
793ff80c 429 return (p + c * fgkNplan + s * fgkNplan * fgkNcham);
f7336fa3 430
431}
432
433//_____________________________________________________________________________
afc51ac2 434Int_t AliTRDgeometry::GetPlane(Int_t d) const
f7336fa3 435{
436 //
437 // Reconstruct the plane number from the detector number
438 //
439
793ff80c 440 return ((Int_t) (d % fgkNplan));
f7336fa3 441
442}
443
444//_____________________________________________________________________________
afc51ac2 445Int_t AliTRDgeometry::GetChamber(Int_t d) const
f7336fa3 446{
447 //
448 // Reconstruct the chamber number from the detector number
449 //
450
793ff80c 451 return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);
f7336fa3 452
453}
454
455//_____________________________________________________________________________
afc51ac2 456Int_t AliTRDgeometry::GetSector(Int_t d) const
f7336fa3 457{
458 //
459 // Reconstruct the sector number from the detector number
460 //
461
793ff80c 462 return ((Int_t) (d / (fgkNplan * fgkNcham)));
f7336fa3 463
464}
465
8737e16f 466//_____________________________________________________________________________
467void AliTRDgeometry::SetOldGeometry()
468{
469 //
470 // Use the old chamber lengths
471 //
472
473 Int_t icham;
474 Int_t iplan;
475
476 Float_t length[kNplan][kNcham] = { { 123.5, 123.5, 110.0, 123.5, 123.5 }
477 , { 131.0, 131.0, 110.0, 131.0, 131.0 }
478 , { 134.5, 138.5, 110.0, 138.5, 134.5 }
479 , { 142.0, 146.0, 110.0, 146.0, 142.0 }
480 , { 142.0, 153.0, 110.0, 153.0, 142.0 }
481 , { 134.0, 160.5, 110.0, 160.5, 134.0 } };
482
483 for (icham = 0; icham < kNcham; icham++) {
484 for (iplan = 0; iplan < kNplan; iplan++) {
485 fClength[iplan][icham] = length[iplan][icham];
486 }
487 }
488
489}