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d9950a5a | 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 | /* $Id$ */ | |
17 | ||
eb38ed55 | 18 | #include "AliESDtrack.h" |
41880fac | 19 | #include "AliTracker.h" |
eb38ed55 | 20 | |
d9950a5a | 21 | #include "AliTRDtrackV1.h" |
22 | #include "AliTRDcluster.h" | |
23 | #include "AliTRDcalibDB.h" | |
24 | #include "AliTRDrecoParam.h" | |
25 | ||
d9950a5a | 26 | ClassImp(AliTRDtrackV1) |
27 | ||
0906e73e | 28 | /////////////////////////////////////////////////////////////////////////////// |
29 | // // | |
30 | // Represents a reconstructed TRD track // | |
31 | // Local TRD Kalman track // | |
32 | // // | |
33 | // Authors: // | |
34 | // Alex Bercuci <A.Bercuci@gsi.de> // | |
35 | // Markus Fasel <M.Fasel@gsi.de> // | |
36 | // // | |
37 | /////////////////////////////////////////////////////////////////////////////// | |
d9950a5a | 38 | |
39 | //_______________________________________________________________ | |
3b57a3f7 | 40 | AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack() |
41 | ,fPIDquality(0) | |
42 | ,fDE(0.) | |
43 | ,fBackupTrack(0x0) | |
0906e73e | 44 | { |
d9950a5a | 45 | // |
46 | // Default constructor | |
47 | // | |
3b57a3f7 | 48 | for(int i =0; i<3; i++) fBudget[i] = 0.; |
49 | ||
50 | Float_t pid = 1./AliPID::kSPECIES; | |
51 | for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid; | |
52 | ||
53 | for(int ip=0; ip<kNplane; ip++){ | |
54 | fTrackletIndex[ip] = 0xffff; | |
55 | fTracklet[ip] = 0x0; | |
56 | } | |
d9950a5a | 57 | } |
58 | ||
59 | //_______________________________________________________________ | |
3b57a3f7 | 60 | AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref) |
61 | ,fPIDquality(ref.fPIDquality) | |
62 | ,fDE(ref.fDE) | |
63 | ,fBackupTrack(0x0) | |
d9950a5a | 64 | { |
65 | // | |
3b57a3f7 | 66 | // Copy constructor |
d9950a5a | 67 | // |
68 | ||
3b57a3f7 | 69 | for(int ip=0; ip<kNplane; ip++){ |
70 | fTrackletIndex[ip] = ref.fTrackletIndex[ip]; | |
71 | fTracklet[ip] = ref.fTracklet[ip]; | |
72 | } | |
73 | ||
74 | for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i]; | |
75 | ||
76 | for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is]; | |
77 | ||
78 | AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters()); | |
d9950a5a | 79 | } |
80 | ||
81 | //_______________________________________________________________ | |
3b57a3f7 | 82 | AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack() |
83 | ,fPIDquality(0) | |
84 | ,fDE(0.) | |
85 | ,fBackupTrack(0x0) | |
d9950a5a | 86 | { |
87 | // | |
3b57a3f7 | 88 | // Constructor from AliESDtrack |
d9950a5a | 89 | // |
90 | ||
3b57a3f7 | 91 | SetLabel(t.GetLabel()); |
92 | SetChi2(0.0); | |
93 | SetMass(t.GetMass()); | |
94 | AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls()); | |
95 | Int_t ti[kNplane]; t.GetTRDtracklets(&ti[0]); | |
96 | for(int ip=0; ip<kNplane; ip++){ | |
97 | fTrackletIndex[ip] = ti[ip] < 0 ? 0xffff : ti[ip]; | |
98 | fTracklet[ip] = 0x0; | |
99 | } | |
100 | for(int i =0; i<3; i++) fBudget[i] = 0.; | |
101 | ||
102 | Float_t pid = 1./AliPID::kSPECIES; | |
103 | for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid; | |
104 | ||
105 | const AliExternalTrackParam *par = &t; | |
106 | if (t.GetStatus() & AliESDtrack::kTRDbackup) { | |
107 | par = t.GetOuterParam(); | |
108 | if (!par) { | |
109 | AliError("No backup info!"); | |
110 | par = &t; | |
111 | } | |
112 | } | |
113 | Set(par->GetX() | |
114 | ,par->GetAlpha() | |
115 | ,par->GetParameter() | |
116 | ,par->GetCovariance()); | |
117 | ||
118 | if(t.GetStatus() & AliESDtrack::kTIME) { | |
119 | StartTimeIntegral(); | |
120 | Double_t times[10]; | |
121 | t.GetIntegratedTimes(times); | |
122 | SetIntegratedTimes(times); | |
123 | SetIntegratedLength(t.GetIntegratedLength()); | |
124 | } | |
d9950a5a | 125 | } |
126 | ||
d9950a5a | 127 | //_______________________________________________________________ |
eb38ed55 | 128 | AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 *trklts, const Double_t p[5], const Double_t cov[15] |
3b57a3f7 | 129 | , Double_t x, Double_t alpha) : AliKalmanTrack() |
130 | ,fPIDquality(0) | |
131 | ,fDE(0.) | |
132 | ,fBackupTrack(0x0) | |
d9950a5a | 133 | { |
0906e73e | 134 | // |
135 | // The stand alone tracking constructor | |
136 | // TEMPORARY !!!!!!!!!!! | |
137 | // to check : | |
138 | // 1. covariance matrix | |
139 | // 2. dQdl calculation | |
140 | // | |
d9950a5a | 141 | |
0906e73e | 142 | Double_t cnv = 1.0 / (GetBz() * kB2C); |
d9950a5a | 143 | |
144 | Double_t pp[5] = { p[0] | |
145 | , p[1] | |
146 | , x*p[4] - p[2] | |
147 | , p[3] | |
148 | , p[4]*cnv }; | |
149 | ||
150 | Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5]; | |
151 | Double_t c32 = x*cov[13] - cov[ 8]; | |
152 | Double_t c20 = x*cov[10] - cov[ 3]; | |
153 | Double_t c21 = x*cov[11] - cov[ 4]; | |
154 | Double_t c42 = x*cov[14] - cov[12]; | |
155 | ||
156 | Double_t cc[15] = { cov[ 0] | |
157 | , cov[ 1], cov[ 2] | |
158 | , c20, c21, c22 | |
159 | , cov[ 6], cov[ 7], c32, cov[ 9] | |
160 | , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv }; | |
161 | ||
162 | Set(x,alpha,pp,cc); | |
3b57a3f7 | 163 | for(int iplane=0; iplane<kNplane; iplane++){ |
164 | fTrackletIndex[iplane] = 0xffff; | |
165 | fTracklet[iplane] = &trklts[iplane]; | |
d9950a5a | 166 | } |
3b57a3f7 | 167 | SetNumberOfClusters(); |
d9950a5a | 168 | } |
169 | ||
bb56afff | 170 | //_______________________________________________________________ |
3b57a3f7 | 171 | AliTRDtrackV1::~AliTRDtrackV1() |
bb56afff | 172 | { |
3b57a3f7 | 173 | if(fBackupTrack) { |
174 | delete fBackupTrack; | |
175 | } | |
176 | fBackupTrack = 0x0; | |
bb56afff | 177 | |
3b57a3f7 | 178 | if(TestBit(1)){ |
179 | for(Int_t ip=0; ip<kNplane; ip++){ | |
180 | if(fTracklet[ip]) delete fTracklet[ip]; | |
181 | fTracklet[ip] = 0x0; | |
182 | } | |
183 | } | |
184 | } | |
185 | ||
186 | //_______________________________________________________________ | |
187 | Bool_t AliTRDtrackV1::CookLabel(Float_t wrong) | |
188 | { | |
189 | // set MC label for this track | |
190 | ||
bb56afff | 191 | Int_t s[kMAXCLUSTERSPERTRACK][2]; |
192 | for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) { | |
193 | s[i][0] = -1; | |
194 | s[i][1] = 0; | |
195 | } | |
3b57a3f7 | 196 | |
bb56afff | 197 | Bool_t labelAdded; |
3b57a3f7 | 198 | Int_t label; |
199 | AliTRDcluster *c = 0x0; | |
200 | for (Int_t ip = 0; ip < kNplane; ip++) { | |
201 | if(fTrackletIndex[ip] == 0xffff) continue; | |
202 | for (Int_t ic = 0; ic < AliTRDseed::knTimebins; ic++) { | |
203 | if(!(c = fTracklet[ip]->GetClusters(ic))) continue; | |
204 | for (Int_t k = 0; k < 3; k++) { | |
205 | label = c->GetLabel(k); | |
206 | labelAdded = kFALSE; | |
207 | Int_t j = 0; | |
208 | if (label >= 0) { | |
209 | while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) { | |
210 | if ((s[j][0] == label) || | |
211 | (s[j][1] == 0)) { | |
212 | s[j][0] = label; | |
213 | s[j][1]++; | |
214 | labelAdded = kTRUE; | |
215 | } | |
216 | j++; | |
217 | } | |
218 | } | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
bb56afff | 223 | Int_t max = 0; |
224 | label = -123456789; | |
225 | for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) { | |
226 | if (s[i][1] <= max) continue; | |
3b57a3f7 | 227 | max = s[i][1]; |
228 | label = s[i][0]; | |
bb56afff | 229 | } |
3b57a3f7 | 230 | |
bb56afff | 231 | if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label; |
3b57a3f7 | 232 | |
bb56afff | 233 | SetLabel(label); |
3b57a3f7 | 234 | |
235 | return kTRUE; | |
bb56afff | 236 | } |
237 | ||
d9950a5a | 238 | //_______________________________________________________________ |
239 | Bool_t AliTRDtrackV1::CookPID() | |
240 | { | |
0906e73e | 241 | // |
242 | // Cook the PID information | |
243 | // | |
3b57a3f7 | 244 | |
245 | // Reset the a priori probabilities | |
246 | Double_t pid = 1. / AliPID::kSPECIES; | |
0906e73e | 247 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) { |
3b57a3f7 | 248 | fPID[ispec] = pid; |
249 | } | |
250 | fPIDquality = 0; | |
251 | ||
252 | // steer PID calculation @ tracklet level | |
253 | Double_t *prob = 0x0; | |
254 | for(int ip=0; ip<kNplane; ip++){ | |
255 | if(fTrackletIndex[ip] == 0xffff) continue; | |
256 | if(!fTracklet[ip]->IsOK()) continue; | |
257 | if(!(prob = fTracklet[ip]->GetProbability())) return kFALSE; | |
258 | ||
259 | Int_t nspec = 0; // quality check of tracklet dEdx | |
260 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){ | |
261 | if(prob[ispec] < 0.) continue; | |
262 | fPID[ispec] *= prob[ispec]; | |
263 | nspec++; | |
264 | } | |
265 | if(!nspec) continue; | |
266 | ||
267 | fPIDquality++; | |
0906e73e | 268 | } |
0906e73e | 269 | |
270 | // no tracklet found for PID calculations | |
271 | if(!fPIDquality) return kTRUE; | |
3b57a3f7 | 272 | |
273 | // slot for PID calculation @ track level | |
274 | ||
275 | ||
0906e73e | 276 | // normalize probabilities |
277 | Double_t probTotal = 0.0; | |
278 | for (Int_t is = 0; is < AliPID::kSPECIES; is++) probTotal += fPID[is]; | |
3b57a3f7 | 279 | |
280 | ||
0906e73e | 281 | if (probTotal <= 0.0) { |
282 | AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference data."); | |
d9950a5a | 283 | return kFALSE; |
284 | } | |
3b57a3f7 | 285 | |
0906e73e | 286 | for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal; |
3b57a3f7 | 287 | |
0906e73e | 288 | return kTRUE; |
d9950a5a | 289 | } |
290 | ||
3b57a3f7 | 291 | //_____________________________________________________________________________ |
292 | Double_t AliTRDtrackV1::GetBz() const | |
0906e73e | 293 | { |
294 | // | |
3b57a3f7 | 295 | // Returns Bz component of the magnetic field (kG) |
0906e73e | 296 | // |
297 | ||
3b57a3f7 | 298 | if (AliTracker::UniformField()) return AliTracker::GetBz(); |
299 | ||
300 | Double_t r[3]; | |
301 | GetXYZ(r); | |
302 | return AliTracker::GetBz(r); | |
303 | } | |
304 | ||
305 | //_______________________________________________________________ | |
306 | Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const | |
307 | { | |
308 | Int_t n = 0; | |
309 | for(Int_t ip=0; ip<kNplane; ip++){ | |
310 | if(!fTracklet[ip]) continue; | |
311 | if(n+fTracklet[ip]->GetN() < id){ | |
312 | n+=fTracklet[ip]->GetN(); | |
313 | continue; | |
314 | } | |
315 | for(Int_t ic=34; ic>=0; ic--){ | |
316 | if(!fTracklet[ip]->GetClusters(ic)) continue; | |
317 | n++; | |
318 | if(n<id) continue; | |
319 | return fTracklet[ip]->GetIndexes(ic); | |
320 | } | |
321 | } | |
322 | return -1; | |
0906e73e | 323 | } |
d9950a5a | 324 | |
325 | //_______________________________________________________________ | |
326 | Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt) const | |
327 | { | |
328 | // | |
0906e73e | 329 | // Get the predicted chi2 |
d9950a5a | 330 | // |
3b57a3f7 | 331 | |
d9950a5a | 332 | Double_t x = trklt->GetX0(); |
333 | Double_t p[2] = { trklt->GetYat(x) | |
334 | , trklt->GetZat(x) }; | |
335 | Double_t cov[3]; | |
3b57a3f7 | 336 | trklt->GetCovAt(x, cov); |
337 | ||
d9950a5a | 338 | return AliExternalTrackParam::GetPredictedChi2(p, cov); |
3b57a3f7 | 339 | } |
d9950a5a | 340 | |
3b57a3f7 | 341 | |
342 | //_____________________________________________________________________________ | |
343 | void AliTRDtrackV1::MakeBackupTrack() | |
344 | { | |
345 | // | |
346 | // Creates a backup track | |
347 | // | |
348 | ||
349 | if(fBackupTrack) { | |
350 | fBackupTrack->~AliTRDtrackV1(); | |
351 | new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this)); | |
352 | } | |
353 | fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this)); | |
d9950a5a | 354 | } |
355 | ||
3b57a3f7 | 356 | //_____________________________________________________________________________ |
357 | Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z) | |
358 | { | |
359 | // | |
360 | // Find a prolongation at given x | |
361 | // Return 0 if it does not exist | |
362 | // | |
363 | ||
364 | Double_t bz = GetBz(); | |
365 | if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return 0; | |
366 | if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return 0; | |
367 | ||
368 | return 1; | |
369 | ||
370 | } | |
371 | ||
372 | //_____________________________________________________________________________ | |
373 | Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho) | |
0906e73e | 374 | { |
375 | // | |
3b57a3f7 | 376 | // Propagates this track to a reference plane defined by "xk" [cm] |
377 | // correcting for the mean crossed material. | |
0906e73e | 378 | // |
3b57a3f7 | 379 | // "xx0" - thickness/rad.length [units of the radiation length] |
380 | // "xrho" - thickness*density [g/cm^2] | |
381 | // | |
0906e73e | 382 | |
3b57a3f7 | 383 | if (xk == GetX()) { |
384 | return kTRUE; | |
385 | } | |
386 | ||
387 | Double_t oldX = GetX(); | |
388 | Double_t oldY = GetY(); | |
389 | Double_t oldZ = GetZ(); | |
390 | ||
391 | Double_t bz = GetBz(); | |
392 | ||
393 | if (!AliExternalTrackParam::PropagateTo(xk,bz)) { | |
394 | return kFALSE; | |
395 | } | |
396 | ||
397 | Double_t x = GetX(); | |
398 | Double_t y = GetY(); | |
399 | Double_t z = GetZ(); | |
400 | ||
401 | if (oldX < xk) { | |
402 | xrho = -xrho; | |
403 | if (IsStartedTimeIntegral()) { | |
404 | Double_t l2 = TMath::Sqrt((x-oldX)*(x-oldX) | |
405 | + (y-oldY)*(y-oldY) | |
406 | + (z-oldZ)*(z-oldZ)); | |
407 | Double_t crv = AliExternalTrackParam::GetC(bz); | |
408 | if (TMath::Abs(l2*crv) > 0.0001) { | |
409 | // Make correction for curvature if neccesary | |
410 | l2 = 0.5 * TMath::Sqrt((x-oldX)*(x-oldX) | |
411 | + (y-oldY)*(y-oldY)); | |
412 | l2 = 2.0 * TMath::ASin(l2 * crv) / crv; | |
413 | l2 = TMath::Sqrt(l2*l2 + (z-oldZ)*(z-oldZ)); | |
414 | } | |
415 | AddTimeStep(l2); | |
416 | } | |
417 | } | |
418 | ||
419 | if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0,xrho,GetMass())) { | |
420 | return kFALSE; | |
421 | } | |
422 | ||
423 | { | |
424 | ||
425 | // Energy losses | |
426 | Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt()); | |
427 | Double_t beta2 = p2 / (p2 + GetMass()*GetMass()); | |
428 | if ((beta2 < 1.0e-10) || | |
429 | ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) { | |
430 | return kFALSE; | |
431 | } | |
432 | ||
433 | Double_t dE = 0.153e-3 / beta2 | |
434 | * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2) | |
435 | * xrho; | |
436 | fBudget[0] += xrho; | |
437 | ||
438 | /* | |
439 | // Suspicious part - think about it ? | |
440 | Double_t kinE = TMath::Sqrt(p2); | |
441 | if (dE > 0.8*kinE) dE = 0.8 * kinE; // | |
442 | if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch | |
443 | */ | |
444 | ||
445 | fDE += dE; | |
446 | ||
447 | /* | |
448 | // Suspicious ! I.B. | |
449 | Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation | |
450 | Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2); | |
451 | fCcc += sigmac2; | |
452 | fCee += fX*fX * sigmac2; | |
453 | */ | |
454 | ||
455 | } | |
456 | ||
457 | return kTRUE; | |
0906e73e | 458 | } |
3b57a3f7 | 459 | |
87a7fa94 | 460 | //_____________________________________________________________________________ |
3b57a3f7 | 461 | Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step) |
87a7fa94 | 462 | { |
463 | // | |
3b57a3f7 | 464 | // Propagate track to the radial position |
465 | // Rotation always connected to the last track position | |
87a7fa94 | 466 | // |
467 | ||
3b57a3f7 | 468 | Double_t xyz0[3]; |
469 | Double_t xyz1[3]; | |
470 | Double_t y; | |
471 | Double_t z; | |
472 | ||
473 | Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY()); | |
474 | // Direction +- | |
475 | Double_t dir = (radius > r) ? -1.0 : 1.0; | |
476 | ||
477 | for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) { | |
478 | ||
479 | GetXYZ(xyz0); | |
480 | Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]); | |
481 | Rotate(alpha,kTRUE); | |
482 | GetXYZ(xyz0); | |
483 | GetProlongation(x,y,z); | |
484 | xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha); | |
485 | xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha); | |
486 | xyz1[2] = z; | |
487 | Double_t param[7]; | |
488 | AliTracker::MeanMaterialBudget(xyz0,xyz1,param); | |
489 | if (param[1] <= 0) { | |
490 | param[1] = 100000000; | |
491 | } | |
492 | PropagateTo(x,param[1],param[0]*param[4]); | |
493 | ||
494 | } | |
495 | ||
496 | GetXYZ(xyz0); | |
497 | Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]); | |
498 | Rotate(alpha,kTRUE); | |
499 | GetXYZ(xyz0); | |
500 | GetProlongation(r,y,z); | |
501 | xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha); | |
502 | xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha); | |
503 | xyz1[2] = z; | |
504 | Double_t param[7]; | |
505 | AliTracker::MeanMaterialBudget(xyz0,xyz1,param); | |
506 | ||
507 | if (param[1] <= 0) { | |
508 | param[1] = 100000000; | |
87a7fa94 | 509 | } |
3b57a3f7 | 510 | PropagateTo(r,param[1],param[0]*param[4]); |
511 | ||
512 | return 0; | |
513 | ||
87a7fa94 | 514 | } |
515 | ||
3b57a3f7 | 516 | //_____________________________________________________________________________ |
517 | Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute) | |
518 | { | |
519 | // | |
520 | // Rotates track parameters in R*phi plane | |
521 | // if absolute rotation alpha is in global system | |
522 | // otherwise alpha rotation is relative to the current rotation angle | |
523 | // | |
524 | ||
525 | if (absolute) alpha -= GetAlpha(); | |
526 | //else fNRotate++; | |
527 | ||
528 | return AliExternalTrackParam::Rotate(GetAlpha()+alpha); | |
529 | } | |
87a7fa94 | 530 | |
eb38ed55 | 531 | //___________________________________________________________ |
532 | void AliTRDtrackV1::SetNumberOfClusters() | |
533 | { | |
534 | // Calculate the number of clusters attached to this track | |
535 | ||
3b57a3f7 | 536 | Int_t ncls = 0; |
537 | for(int ip=0; ip<kNplane; ip++){ | |
538 | if(fTracklet[ip] && fTrackletIndex[ip] != 0xffff) ncls += fTracklet[ip]->GetN(); | |
539 | } | |
540 | AliKalmanTrack::SetNumberOfClusters(ncls); | |
eb38ed55 | 541 | } |
542 | ||
543 | ||
0906e73e | 544 | //_______________________________________________________________ |
3b57a3f7 | 545 | void AliTRDtrackV1::SetOwner() |
0906e73e | 546 | { |
547 | // | |
548 | // Toggle ownership of tracklets | |
549 | // | |
550 | ||
3b57a3f7 | 551 | if(TestBit(1)) return; |
552 | for (Int_t ip = 0; ip < kNplane; ip++) { | |
553 | if(fTrackletIndex[ip] == 0xffff) continue; | |
554 | fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]); | |
555 | fTracklet[ip]->SetOwner(); | |
556 | } | |
557 | SetBit(1); | |
0906e73e | 558 | } |
559 | ||
d9950a5a | 560 | //_______________________________________________________________ |
3b57a3f7 | 561 | void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *trklt, Int_t index) |
d9950a5a | 562 | { |
563 | // | |
0906e73e | 564 | // Set the tracklets |
d9950a5a | 565 | // |
3b57a3f7 | 566 | Int_t plane = trklt->GetPlane(); |
567 | fTracklet[plane] = trklt; | |
568 | fTrackletIndex[plane] = index; | |
d9950a5a | 569 | } |
570 | ||
571 | //_______________________________________________________________ | |
0906e73e | 572 | Bool_t AliTRDtrackV1::Update(AliTRDseedV1 *trklt, Double_t chisq) |
d9950a5a | 573 | { |
574 | // | |
3b57a3f7 | 575 | // Update track and tracklet parameters |
d9950a5a | 576 | // |
3b57a3f7 | 577 | |
0906e73e | 578 | Double_t x = trklt->GetX0(); |
d9950a5a | 579 | Double_t p[2] = { trklt->GetYat(x) |
580 | , trklt->GetZat(x) }; | |
581 | Double_t cov[3]; | |
3b57a3f7 | 582 | trklt->GetCovAt(x, cov); |
583 | ||
584 | ||
d9950a5a | 585 | if(!AliExternalTrackParam::Update(p, cov)) return kFALSE; |
3b57a3f7 | 586 | |
587 | AliTRDcluster *c = 0x0; | |
588 | Int_t ic = 0; while(!(c = trklt->GetClusters(ic))) ic++; | |
589 | AliTracker::FillResiduals(this, p, cov, c->GetVolumeId()); | |
590 | ||
591 | ||
d9950a5a | 592 | // Register info to track |
3b57a3f7 | 593 | SetNumberOfClusters(); |
d9950a5a | 594 | SetChi2(GetChi2() + chisq); |
3b57a3f7 | 595 | |
596 | // update tracklet | |
597 | trklt->SetMomentum(GetP()); | |
598 | trklt->SetSnp(GetSnp()); | |
599 | trklt->SetTgl(GetTgl()); | |
600 | return kTRUE; | |
d9950a5a | 601 | } |
602 | ||
603 | //_______________________________________________________________ | |
0906e73e | 604 | void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track) |
d9950a5a | 605 | { |
606 | // | |
6984f7c1 | 607 | // Update the TRD PID information in the ESD track |
d9950a5a | 608 | // |
6984f7c1 | 609 | |
610 | track->SetNumberOfTRDslices(kNslice); | |
3b57a3f7 | 611 | |
6984f7c1 | 612 | for (Int_t ip = 0; ip < kNplane; ip++) { |
3b57a3f7 | 613 | if(fTrackletIndex[ip] == 0xffff) continue; |
614 | fTracklet[ip]->CookdEdx(kNslice); | |
615 | Float_t *dedx = fTracklet[ip]->GetdEdx(); | |
616 | for (Int_t js = 0; js < kNslice; js++) track->SetTRDslice(dedx[js], ip, js); | |
6984f7c1 | 617 | } |
0906e73e | 618 | |
6984f7c1 | 619 | // copy PID to ESD |
620 | track->SetTRDpid(fPID); | |
621 | track->SetTRDpidQuality(fPIDquality); | |
d9950a5a | 622 | } |