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0f4a7374 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$Log$
7e6dce66 18Revision 1.5 2004/04/20 14:37:22 hristov
19Using TMath::Abs instead of fabs, arrays of variable size created/deleted correctly (HP,Sun)
20
9b49e4c9 21Revision 1.4 2004/04/13 09:42:51 decaro
22Track reconstruction code for TOF: updating
23
74ea065c 24Revision 1.3 2003/12/29 18:40:39 hristov
25Copy/paste error corrected
26
fb9747d4 27Revision 1.2 2003/12/29 17:26:01 hristov
28Using enum to initaialize static ints in the header file, the initialization of static floats moved to the implementation file
29
58eb5b61 30Revision 1.1 2003/12/29 15:18:03 decaro
31TOF geometry updating (addition of AliTOFGeometry)
32
7e6dce66 33Revision 0.05 2004/6/11 A.De Caro
34 Implement Global method NpadXStrip
35 Insert four float constants (originally in AliTOF class)
36Revision 0.04 2004/4/05 S.Arcelli
74ea065c 37 Implement Global methods IsInsideThePad
38 DistanceToPad
7e6dce66 39Revision 0.03 2003/12/14 S.Arcelli
40 Set Phi range [-180,180]->[0,360]
41Revision 0.02 2003/12/10 S.Arcelli:
42 Implement Global methods GetPos & GetDetID
43Revision 0.01 2003/12/04 S.Arcelli
0f4a7374 44*/
45
46#include <stdlib.h>
47#include <Riostream.h>
48///////////////////////////////////////////////////////////////////////////////
49// //
50// TOF Geometry class //
51// //
52///////////////////////////////////////////////////////////////////////////////
53
54#include "AliConst.h"
55#include "AliTOFGeometry.h"
56
57ClassImp(AliTOFGeometry)
58
7e6dce66 59const Int_t AliTOFGeometry::fgkTimeDiff = 25000; // Min signal separation (ps)
58eb5b61 60
7e6dce66 61const Float_t AliTOFGeometry::fgkxTOF = 371.; // Inner radius of the TOF for Reconstruction (cm)
62const Float_t AliTOFGeometry::fgkRmin = 370.; // Inner radius of the TOF (cm)
63const Float_t AliTOFGeometry::fgkRmax = 399; // Outer radius of the TOF (cm)
64const Float_t AliTOFGeometry::fgkZlenA = 106.0; // length (cm) of the A module
65const Float_t AliTOFGeometry::fgkZlenB = 141.0; // length (cm) of the B module
66const Float_t AliTOFGeometry::fgkZlenC = 177.5; // length (cm) of the C module
67const Float_t AliTOFGeometry::fgkXPad = 2.5; // Pad size in the x direction (cm)
68const Float_t AliTOFGeometry::fgkZPad = 3.5; // Pad size in the z direction (cm)
69const Float_t AliTOFGeometry::fgkMaxhZtof = 371.5; // Max half z-size of TOF (cm)
70const Float_t AliTOFGeometry::fgkStripLength = 122.;// Strip Length (rho X phi direction) (cm)
71const Float_t AliTOFGeometry::fgkDeadBndX = 1.0; // Dead Boundaries of a Strip along X direction (length) (cm)
72const Float_t AliTOFGeometry::fgkDeadBndZ = 1.5; // Dead Boundaries of a Strip along Z direction (width) (cm)
73const Float_t AliTOFGeometry::fgkOverSpc = 15.3; // Space available for sensitive layers in radial direction (cm)
58eb5b61 74
75
fb9747d4 76const Float_t AliTOFGeometry::fgkSigmaForTail1= 2.;//Sig1 for simulation of TDC tails
77const Float_t AliTOFGeometry::fgkSigmaForTail2= 0.5;//Sig2 for simulation of TDC tails
78const Float_t AliTOFGeometry::fgkSpeedOfLight = 0.299792458;// c (10^9 m/s)
79const Float_t AliTOFGeometry::fgkPionMass = 0.13957;// pion mass (Gev/c^2)
80const Float_t AliTOFGeometry::fgkKaonMass = 0.49368;// kaon mass (Gev/c^2)
81const Float_t AliTOFGeometry::fgkProtonMass = 0.93827;// proton mass (Gev/c^2)
82const Float_t AliTOFGeometry::fgkElectronMass = 0.00051;// electron mass (Gev/c^2)
83const Float_t AliTOFGeometry::fgkMuonMass = 0.10566;// muon mass (Gev/c^2)
58eb5b61 84
85
fb9747d4 86const Float_t AliTOFGeometry::fgkDprecMin = 0.0000075;//num.prec.tolerance on Thmin
87const Float_t AliTOFGeometry::fgkDprecMax = 0.0000100;//num.prec.tolerance on Thma
88const Float_t AliTOFGeometry::fgkDprecCen = 0.0000005;//num.prec.tolerance on <Theta>
58eb5b61 89
0f4a7374 90//_____________________________________________________________________________
91AliTOFGeometry::AliTOFGeometry()
92{
93 //
94 // AliTOFGeometry default constructor
95 //
96 Init();
97
98}
99
100//_____________________________________________________________________________
101AliTOFGeometry::~AliTOFGeometry()
102{
103 //
104 // AliTOFGeometry destructor
105 //
106
107}
108//_____________________________________________________________________________
109void AliTOFGeometry::Init()
110{
111 //
112 // Initialize strip Tilt Angles and Heights
113 //
114 // Strips Tilt Angles
115
74ea065c 116 Float_t const kangles[kNPlates][kMaxNstrip] ={
0f4a7374 117
118 {44.494, 43.725, 42.946, 42.156, 41.357, 40.548, 39.729, 38.899,
119 38.060, 37.211, 36.353, 35.484, 34.606, 33.719, 32.822, 31.916,
120 31.001, 30.077, 29.144, 28.202 },
121
122 {26.884, 25.922, 24.952, 23.975, 22.989, 22.320, 21.016, 20.309,
123 19.015, 18.270, 16.989, 16.205, 14.941, 14.117, 12.871, 12.008,
124 10.784, 9.8807, 8.681, 0.0 },
125
126 { 7.5835, 6.4124, 5.4058, 4.2809, 3.2448, 2.1424, 1.078, -0., -1.078,
127 -2.1424, -3.2448, -4.2809, -5.4058, -6.4124, -7.5835, 0.0, 0.0, 0.0,
128 0.0, 0.0 },
129
130 {-8.681, -9.8807, -10.784, -12.008, -12.871, -14.117, -14.941, -16.205,
131 -16.989, -18.27, -19.015, -20.309, -21.016, -22.32, -22.989,
132 -23.975, -24.952, -25.922, -26.884, 0. },
133
134 {-28.202, -29.144, -30.077, -31.001, -31.916, -32.822, -33.719, -34.606,
135 -35.484, -36.353, -37.211, -38.06, -38.899, -39.729, -40.548,
136 -41.357, -42.156, -42.946, -43.725, -44.494 }};
137
138
139 //Strips Heights
140
74ea065c 141 Float_t const kheights[kNPlates][kMaxNstrip]= {
0f4a7374 142
143 {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5,
144 -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 },
145
146 {-6.3, -7.1, -7.9, -8.7, -9.5, -3, -9.5, -3, -9.5, -3,
147 -9.5, -3.0, -9.5, -3.0, -9.5, -3, -9.5, -3, -9 , 0.},
148
149 { -3, -9, -4.5, -9, -4.5, -9, -4.5, -9, -4.5, -9,
150 -4.5, -9, -4.5, -9, -3, 0.0, 0.0, 0.0, 0.0, 0.0 },
151
152 { -9, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5,
153 -3, -9.5, -3, -9.5, -8.7, -7.9, -7.1, -6.3, 0. },
154
155 {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5,
156 -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }};
157
158
159 // Deposit in fAngles, fHeights
160
74ea065c 161 for (Int_t iplate = 0; iplate < kNPlates; iplate++) {
162 for (Int_t istrip = 0; istrip < kMaxNstrip; istrip++) {
163 fAngles[iplate][istrip] = kangles[iplate][istrip];
164 fHeights[iplate][istrip] = kheights[iplate][istrip];
0f4a7374 165 }
166 }
167
74ea065c 168 fPhiSec = 360./kNSectors;
169}
170
171//_____________________________________________________________________________
172Float_t AliTOFGeometry::DistanceToPad(Int_t *det, Float_t *pos)
173{
174//
175// Returns distance of space point with coor pos (x,y,z) (cm) wrt
176// pad with Detector Indices idet (iSect,iPlate,iStrip,iPadX,iPadZ)
177//
178
179 //Transform pos into Sector Frame
180
181 Float_t x = pos[0];
182 Float_t y = pos[1];
183 Float_t z = pos[2];
184
185 Float_t radius = TMath::Sqrt(x*x+y*y);
186 Float_t phi=TMath::ATan2(y,x);
187 if(phi<0) phi=2.*TMath::Pi()+phi;
188 // Get the local angle in the sector philoc
189 Float_t angle = phi*kRaddeg-( Int_t (kRaddeg*phi/20.) + 0.5)*fPhiSec;
190 Float_t xs = radius*TMath::Cos(angle/kRaddeg);
191 Float_t ys = radius*TMath::Sin(angle/kRaddeg);
192 Float_t zs = z;
193
194 // Do the same for the selected pad
195
196 Float_t g[3];
197 GetPos(det,g);
198
199 Float_t padRadius = TMath::Sqrt(g[0]*g[0]+g[1]*g[1]);
200 Float_t padPhi=TMath::ATan2(g[1],g[0]);
201 if(padPhi<0) padPhi=2.*TMath::Pi()+padPhi;
202 // Get the local angle in the sector philoc
203 Float_t padAngle = padPhi*kRaddeg-( Int_t (padPhi*kRaddeg/20.)+ 0.5) * fPhiSec;
204 Float_t padxs = padRadius*TMath::Cos(padAngle/kRaddeg);
205 Float_t padys = padRadius*TMath::Sin(padAngle/kRaddeg);
206 Float_t padzs = g[2];
207
208 //Now move to local pad coordinate frame. Translate:
209
210 Float_t xt = xs-padxs;
211 Float_t yt = ys-padys;
212 Float_t zt = zs-padzs;
213 //Now Rotate:
214
215 Float_t alpha = GetAngles(det[1],det[2]);
216 Float_t xr = xt*TMath::Cos(alpha/kRaddeg)+zt*TMath::Sin(alpha/kRaddeg);
217 Float_t yr = yt;
218 Float_t zr = -xt*TMath::Sin(alpha/kRaddeg)+zt*TMath::Cos(alpha/kRaddeg);
219
220 Float_t dist = TMath::Sqrt(xr*xr+yr*yr+zr*zr);
221 return dist;
222
223}
224
225
226//_____________________________________________________________________________
227Bool_t AliTOFGeometry::IsInsideThePad(Int_t *det, Float_t *pos)
228{
229//
230// Returns true if space point with coor pos (x,y,z) (cm) falls
231// inside pad with Detector Indices idet (iSect,iPlate,iStrip,iPadX,iPadZ)
232//
233
234 Bool_t isInside=false;
235
236
237 //Transform pos into Sector Frame
238
239 Float_t x = pos[0];
240 Float_t y = pos[1];
241 Float_t z = pos[2];
242
243 Float_t radius = TMath::Sqrt(x*x+y*y);
244 Float_t phi=TMath::ATan2(y,x);
245 if(phi<0) phi=2.*TMath::Pi()+phi;
246 // Get the local angle in the sector philoc
247 Float_t angle = phi*kRaddeg-( Int_t (kRaddeg*phi/20.) + 0.5) *fPhiSec;
248 Float_t xs = radius*TMath::Cos(angle/kRaddeg);
249 Float_t ys = radius*TMath::Sin(angle/kRaddeg);
250 Float_t zs = z;
251
252 // Do the same for the selected pad
253
254 Float_t g[3];
255 GetPos(det,g);
256
257 Float_t padRadius = TMath::Sqrt(g[0]*g[0]+g[1]*g[1]);
258 Float_t padPhi=TMath::ATan2(g[1],g[0]);
259 if(padPhi<0) padPhi=2.*TMath::Pi()+padPhi;
260 // Get the local angle in the sector philoc
261 Float_t padAngle = padPhi*kRaddeg-( Int_t (padPhi*kRaddeg/20.)+ 0.5) * fPhiSec;
262 Float_t padxs = padRadius*TMath::Cos(padAngle/kRaddeg);
263 Float_t padys = padRadius*TMath::Sin(padAngle/kRaddeg);
264 Float_t padzs = g[2];
265
266 //Now move to local pad coordinate frame. Translate:
267
268 Float_t xt = xs-padxs;
269 Float_t yt = ys-padys;
270 Float_t zt = zs-padzs;
271 //Now Rotate:
272
273 Float_t alpha = GetAngles(det[1],det[2]);
274 Float_t xr = xt*TMath::Cos(alpha/kRaddeg)+zt*TMath::Sin(alpha/kRaddeg);
275 Float_t yr = yt;
276 Float_t zr = -xt*TMath::Sin(alpha/kRaddeg)+zt*TMath::Cos(alpha/kRaddeg);
277
9b49e4c9 278 if(TMath::Abs(xr)<=0.75 && TMath::Abs(yr)<= (fgkXPad*0.5) && TMath::Abs(zr)<= (fgkZPad*0.5))
74ea065c 279 isInside=true;
280 return isInside;
281
0f4a7374 282}
283
284//_____________________________________________________________________________
285void AliTOFGeometry::GetPos(Int_t *det, Float_t *pos)
286{
287//
288// Returns space point coor (x,y,z) (cm) for Detector
289// Indices (iSect,iPlate,iStrip,iPadX,iPadZ)
290//
291
292 pos[0]=GetX(det);
293 pos[1]=GetY(det);
294 pos[2]=GetZ(det);
295
296}
297//_____________________________________________________________________________
298void AliTOFGeometry::GetDetID( Float_t *pos, Int_t *det)
299{
300 //
301 // Returns Detector Indices (iSect,iPlate,iStrip,iPadX,iPadZ)
302 // space point coor (x,y,z) (cm)
303
304
305 det[0]=GetSector(pos);
306 det[1]=GetPlate(pos);
307 det[2]=GetStrip(pos);
308 det[3]=GetPadZ(pos);
309 det[4]=GetPadX(pos);
310
311}
312//_____________________________________________________________________________
313Float_t AliTOFGeometry::GetX(Int_t *det)
314{
315 //
316 // Returns X coordinate (cm)
317 //
318
319 Int_t isector = det[0];
320 Int_t iplate = det[1];
321 Int_t istrip = det[2];
322 Int_t ipadz = det[3];
323 Int_t ipadx = det[4];
324
325 // Find out distance d on the plane wrt median phi:
74ea065c 326 Float_t d = (ipadx+0.5)*fgkXPad-(kNpadX*fgkXPad)*0.5;
0f4a7374 327
328 // The radius r in xy plane:
329 Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
330 (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
331
332 // local azimuthal angle in the sector philoc
333 Float_t philoc = TMath:: ATan(d/r);
334
335 // azimuthal angle in the global frame phi
336 Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec;
337
338 Float_t xCoor = r/TMath::Cos(philoc)*TMath::Cos(phi/kRaddeg);
339 return xCoor;
340
341}
342//_____________________________________________________________________________
343Float_t AliTOFGeometry::GetY(Int_t *det)
344{
345 //
346 // Returns Y coordinate (cm)
347 //
348
349 Int_t isector = det[0];
350 Int_t iplate = det[1];
351 Int_t istrip = det[2];
352 Int_t ipadz = det[3];
353 Int_t ipadx = det[4];
354
355 // Find out distance d on the plane wrt median phi:
74ea065c 356 Float_t d = (ipadx+0.5)*fgkXPad-(kNpadX*fgkXPad)*0.5;
0f4a7374 357
358 // The radius r in xy plane:
359 Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
360 (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
361
362 // local azimuthal angle in the sector philoc
363 Float_t philoc = TMath:: ATan(d/r);
364
365 // azimuthal angle in the global frame phi
366 Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec;
367
368 Float_t yCoor = r/TMath::Cos(philoc)*TMath::Sin(phi/kRaddeg);
369 return yCoor;
370
371}
372
373//_____________________________________________________________________________
374Float_t AliTOFGeometry::GetZ(Int_t *det)
375{
376 //
377 // Returns Z coordinate (cm)
378 //
379
380 Int_t iplate = det[1];
381 Int_t istrip = det[2];
382 Int_t ipadz = det[3];
383
384
385 // The radius r in xy plane:
386 Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip];
387
74ea065c 388 Float_t zCoor = r*TMath::Tan(0.5*TMath::Pi()-GetStripTheta(iplate,istrip))-
0f4a7374 389 (ipadz-0.5)*fgkZPad*TMath::Cos(fAngles[iplate][istrip]/kRaddeg);
390 return zCoor;
391
392}
393//_____________________________________________________________________________
394Int_t AliTOFGeometry::GetSector(Float_t *pos)
395{
396 //
397 // Returns the Sector index
398 //
399
400 Int_t iSect = -1;
401
402 Float_t x = pos[0];
403 Float_t y = pos[1];
404
405 Float_t phi = TMath::ATan2(y,x);
406 if(phi<0.) phi=2.*TMath::Pi()+phi;
407 iSect = (Int_t) (phi*kRaddeg/fPhiSec);
408
409 return iSect;
410
411}
412//_____________________________________________________________________________
413Int_t AliTOFGeometry::GetPadX(Float_t *pos)
414{
415 //
416 // Returns the Pad index along X
417 //
418
419 Int_t iPadX = -1;
420
421 Float_t x = pos[0];
422 Float_t y = pos[1];
423 Float_t z = pos[2];
424
425 Int_t isector = GetSector(pos);
426 if(isector == -1){
427 cout << "Detector Index could not be determined" << endl;
428 return iPadX;}
429 Int_t iplate = GetPlate(pos);
430 if(iplate == -1){
431 cout << "Detector Index could not be determined" << endl;
432 return iPadX;}
433 Int_t istrip = GetStrip(pos);
434 if(istrip == -1){
435 cout << "Detector Index could not be determined" << endl;
436 return iPadX;}
437
438
439 Float_t rho=TMath::Sqrt(x*x+y*y);
440 Float_t phi = TMath::ATan2(y,x);
441 if(phi<0.) phi=2.*TMath::Pi()+phi;
442
443 // Get the local angle in the sector philoc
444 Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec;
445 philoc*=TMath::Pi()/180.;
446 // theta projected on the median of the sector
447 Float_t theta = TMath::ATan2(rho*TMath::Cos(philoc),z);
448 // The radius r in xy plane:
449 Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
450 (theta-GetStripTheta(iplate, istrip))/
451 (GetMaxStripTheta(iplate, istrip)-GetMinStripTheta(iplate, istrip))
452 * 2.*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
453
454 // Find out distance projected onto the strip plane
74ea065c 455 Float_t d = (r*TMath::Tan(philoc)+(kNpadX*fgkXPad)*0.5);
0f4a7374 456
457 iPadX = (Int_t) ( d/fgkXPad);
458 return iPadX;
459
460}
461//_____________________________________________________________________________
462Int_t AliTOFGeometry::GetPlate(Float_t *pos)
463{
464 //
465 // Returns the Plate index
466 //
467 Int_t iPlate=-1;
468
469 Int_t isector = GetSector(pos);
470 if(isector == -1){
471 cout << "Detector Index could not be determined" << endl;
472 return iPlate;}
473
474 Float_t x = pos[0];
475 Float_t y = pos[1];
476 Float_t z = pos[2];
477
478 Float_t rho=TMath::Sqrt(x*x+y*y);
479 Float_t phi=TMath::ATan2(y,x);
480 if(phi<0) phi=2.*TMath::Pi()+phi;
481 // Get the local angle in the sector philoc
482 Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec;
483 philoc*=TMath::Pi()/180.;
484 // theta projected on the median of the sector
485 Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
486
74ea065c 487 for (Int_t i=0; i<kNPlates; i++){
0f4a7374 488 if ( GetMaxPlateTheta(i) >= theta &&
489 GetMinPlateTheta(i) <= theta)iPlate=i;
490 }
491
492 return iPlate;
493
494}
495//_____________________________________________________________________________
496Int_t AliTOFGeometry::GetStrip(Float_t *pos)
497{
498 //
499 // Returns the Strip index
500 //
501
502 Int_t iStrip=-1;
503
504
505 Int_t isector = GetSector(pos);
506 if(isector == -1){
507 cout << "Detector Index could not be determined" << endl;
508 return iStrip;}
509 Int_t iplate = GetPlate(pos);
510 if(iplate == -1){
511 cout << "Detector Index could not be determined" << endl;
512 return iStrip;}
513
514
515 Float_t x = pos[0];
516 Float_t y = pos[1];
517 Float_t z = pos[2];
518
519 Int_t nstrips=0;
74ea065c 520 if(iplate==0 || iplate == 4)nstrips=kNStripC;
521 if(iplate==1 || iplate == 3)nstrips=kNStripB;
522 if(iplate==2) nstrips=kNStripA;
0f4a7374 523
524 Float_t rho=TMath::Sqrt(x*x+y*y);
525 Float_t phi=TMath::ATan2(y,x);
526 if(phi<0) phi=2.*TMath::Pi()+phi;
527 // Get the local angle in the sector philoc
528 Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec;
529 philoc*=TMath::Pi()/180.;
530 // theta projected on the median of the sector
531 Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
532
533 for (Int_t istrip=0; istrip<nstrips; istrip++){
534
535 if(
536 GetMaxStripTheta(iplate,istrip) >= theta
537 &&
538 GetMinStripTheta(iplate,istrip) <= theta ) iStrip = istrip;
539
540 }
541
542 return iStrip;
543}
544//_____________________________________________________________________________
545Int_t AliTOFGeometry::GetPadZ(Float_t *pos)
546{
547 //
548 // Returns the Pad index along Z
549 //
550 Int_t iPadZ = -1;
551
552 Int_t isector = GetSector(pos);
553 if(isector == -1){
554 cout << "Detector Index could not be determined" << endl;
555 return iPadZ;}
556 Int_t iplate = GetPlate(pos);
557 if(iplate == -1){
558 cout << "Detector Index could not be determined" << endl;
559 return iPadZ;}
560 Int_t istrip = GetStrip(pos);
561 if(istrip == -1){
562 cout << "Detector Index could not be determined" << endl;
563 return iPadZ;}
564
565
566 Float_t x = pos[0];
567 Float_t y = pos[1];
568 Float_t z = pos[2];
569
570 Float_t rho=TMath::Sqrt(x*x+y*y);
571 Float_t phi=TMath::ATan2(y,x);
572 if(phi<0) phi=2.*TMath::Pi()+phi;
573 Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec;
574 philoc*=TMath::Pi()/180.;
575 Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
576
577 if (theta >= GetStripTheta(iplate, istrip))iPadZ=1;
578 else iPadZ=0;
579
580 return iPadZ;
581}
582//_____________________________________________________________________________
583Float_t AliTOFGeometry::GetMinPlateTheta(Int_t iPlate)
584{
585 //
586 // Returns the minimum theta angle of a given plate iPlate (rad)
587 //
588
589
590 Int_t index=0;
591
592 Float_t delta =0.;
593 if(iPlate==0)delta = -1. ;
594 if(iPlate==1)delta = -0.5;
595 if(iPlate==3)delta = +0.5;
596 if(iPlate==4)delta = +1. ;
597
598 Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta;
599 Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index];
600 z =z+fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg);
601 r =r-fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg);
602
603 Float_t thmin = 0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin;
604 return thmin;
605
606}
607//_____________________________________________________________________________
608Float_t AliTOFGeometry::GetMaxPlateTheta(Int_t iPlate)
609{
610 //
611 // Returns the maximum theta angle of a given plate iPlate (rad)
612
613 Int_t index=0;
74ea065c 614 if(iPlate==0 ||iPlate == 4)index=kNStripC-1;
615 if(iPlate==1 ||iPlate == 3)index=kNStripB-1;
616 if(iPlate==2) index=kNStripA-1;
0f4a7374 617
618 Float_t delta =0.;
619 if(iPlate==0)delta = -1. ;
620 if(iPlate==1)delta = -0.5;
621 if(iPlate==3)delta = +0.5;
622 if(iPlate==4)delta = +1. ;
623
624 Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta;
625 Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index];
626 z =z-fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg);
627 r= r+fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg);
628
629 Float_t thmax = 0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax;
630 return thmax;
631
632}
633//_____________________________________________________________________________
634Float_t AliTOFGeometry::GetMaxStripTheta(Int_t iPlate, Int_t iStrip)
635{
636 //
637 // Returns the maximum theta angle of a given strip iStrip (rad)
638 //
639
640
641 Float_t delta =0.;
642 if(iPlate==0)delta = -1. ;
643 if(iPlate==1)delta = -0.5;
644 if(iPlate==3)delta = +0.5;
645 if(iPlate==4)delta = +1. ;
646
647 Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
648 Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
649 z = z-fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg);
650 r = r+fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg);
651 Float_t thmax =0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax;
652 return thmax;
653
654}
655
656//_____________________________________________________________________________
657Float_t AliTOFGeometry::GetMinStripTheta(Int_t iPlate, Int_t iStrip)
658{
659 //
660 // Returns the minimum theta angle of a given Strip iStrip (rad)
661 //
662
663
664 Float_t delta =0.;
665 if(iPlate==0)delta = -1. ;
666 if(iPlate==1)delta = -0.5;
667 if(iPlate==3)delta = +0.5;
668 if(iPlate==4)delta = +1. ;
669
670
671 Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
672 Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
673 z =z+fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg);
674 r =r-fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg);
675 Float_t thmin =0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin;
676
677 return thmin;
678
679}
680
681
682//_____________________________________________________________________________
683Float_t AliTOFGeometry::GetStripTheta(Int_t iPlate, Int_t iStrip)
684{
685 //
686 // returns the median theta angle of a given strip iStrip (rad)
687 //
688
689
690 Float_t delta =0.;
691 if(iPlate==0)delta = -1. ;
692 if(iPlate==1)delta = -0.5;
693 if(iPlate==3)delta = +0.5;
694 if(iPlate==4)delta = +1. ;
695
696 Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
697 Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
698 Float_t theta =0.5*TMath::Pi()-TMath::ATan(z/r);
699 if(iPlate != 2){
700 if(theta > 0.5*TMath::Pi() )theta+=fgkDprecCen;
701 if(theta < 0.5*TMath::Pi() )theta-=fgkDprecCen;
702 }
703 return theta;
704}
705
706
707