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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" | |
3afdab72 | 24 | #include "AliTRDReconstructor.h" |
d9950a5a | 25 | #include "AliTRDrecoParam.h" |
26 | ||
d9950a5a | 27 | ClassImp(AliTRDtrackV1) |
28 | ||
0906e73e | 29 | /////////////////////////////////////////////////////////////////////////////// |
30 | // // | |
31 | // Represents a reconstructed TRD track // | |
32 | // Local TRD Kalman track // | |
33 | // // | |
34 | // Authors: // | |
35 | // Alex Bercuci <A.Bercuci@gsi.de> // | |
36 | // Markus Fasel <M.Fasel@gsi.de> // | |
37 | // // | |
38 | /////////////////////////////////////////////////////////////////////////////// | |
d9950a5a | 39 | |
40 | //_______________________________________________________________ | |
3b57a3f7 | 41 | AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack() |
42 | ,fPIDquality(0) | |
43 | ,fDE(0.) | |
44 | ,fBackupTrack(0x0) | |
0906e73e | 45 | { |
d9950a5a | 46 | // |
47 | // Default constructor | |
48 | // | |
3b57a3f7 | 49 | for(int i =0; i<3; i++) fBudget[i] = 0.; |
50 | ||
51 | Float_t pid = 1./AliPID::kSPECIES; | |
52 | for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid; | |
53 | ||
54 | for(int ip=0; ip<kNplane; ip++){ | |
55 | fTrackletIndex[ip] = 0xffff; | |
56 | fTracklet[ip] = 0x0; | |
57 | } | |
d9950a5a | 58 | } |
59 | ||
60 | //_______________________________________________________________ | |
3b57a3f7 | 61 | AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref) |
62 | ,fPIDquality(ref.fPIDquality) | |
63 | ,fDE(ref.fDE) | |
64 | ,fBackupTrack(0x0) | |
d9950a5a | 65 | { |
66 | // | |
3b57a3f7 | 67 | // Copy constructor |
d9950a5a | 68 | // |
69 | ||
3b57a3f7 | 70 | for(int ip=0; ip<kNplane; ip++){ |
71 | fTrackletIndex[ip] = ref.fTrackletIndex[ip]; | |
72 | fTracklet[ip] = ref.fTracklet[ip]; | |
73 | } | |
74 | ||
75 | for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i]; | |
76 | ||
77 | for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is]; | |
78 | ||
79 | AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters()); | |
d9950a5a | 80 | } |
81 | ||
82 | //_______________________________________________________________ | |
3b57a3f7 | 83 | AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack() |
84 | ,fPIDquality(0) | |
85 | ,fDE(0.) | |
86 | ,fBackupTrack(0x0) | |
d9950a5a | 87 | { |
88 | // | |
3b57a3f7 | 89 | // Constructor from AliESDtrack |
d9950a5a | 90 | // |
91 | ||
3b57a3f7 | 92 | SetLabel(t.GetLabel()); |
93 | SetChi2(0.0); | |
94 | SetMass(t.GetMass()); | |
95 | AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls()); | |
96 | Int_t ti[kNplane]; t.GetTRDtracklets(&ti[0]); | |
97 | for(int ip=0; ip<kNplane; ip++){ | |
98 | fTrackletIndex[ip] = ti[ip] < 0 ? 0xffff : ti[ip]; | |
99 | fTracklet[ip] = 0x0; | |
100 | } | |
101 | for(int i =0; i<3; i++) fBudget[i] = 0.; | |
102 | ||
103 | Float_t pid = 1./AliPID::kSPECIES; | |
104 | for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid; | |
105 | ||
106 | const AliExternalTrackParam *par = &t; | |
107 | if (t.GetStatus() & AliESDtrack::kTRDbackup) { | |
108 | par = t.GetOuterParam(); | |
109 | if (!par) { | |
110 | AliError("No backup info!"); | |
111 | par = &t; | |
112 | } | |
113 | } | |
114 | Set(par->GetX() | |
115 | ,par->GetAlpha() | |
116 | ,par->GetParameter() | |
117 | ,par->GetCovariance()); | |
118 | ||
119 | if(t.GetStatus() & AliESDtrack::kTIME) { | |
120 | StartTimeIntegral(); | |
121 | Double_t times[10]; | |
122 | t.GetIntegratedTimes(times); | |
123 | SetIntegratedTimes(times); | |
124 | SetIntegratedLength(t.GetIntegratedLength()); | |
125 | } | |
d9950a5a | 126 | } |
127 | ||
d9950a5a | 128 | //_______________________________________________________________ |
eb38ed55 | 129 | AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 *trklts, const Double_t p[5], const Double_t cov[15] |
3b57a3f7 | 130 | , Double_t x, Double_t alpha) : AliKalmanTrack() |
131 | ,fPIDquality(0) | |
132 | ,fDE(0.) | |
133 | ,fBackupTrack(0x0) | |
d9950a5a | 134 | { |
0906e73e | 135 | // |
136 | // The stand alone tracking constructor | |
137 | // TEMPORARY !!!!!!!!!!! | |
138 | // to check : | |
139 | // 1. covariance matrix | |
140 | // 2. dQdl calculation | |
141 | // | |
d9950a5a | 142 | |
fb17de1f | 143 | Double_t cnv = GetBz() < 1.e-5 ? 1.e5 : 1.0 / (GetBz() * kB2C); |
144 | // Double_t cnv = 1.0 / (GetBz() * kB2C); | |
d9950a5a | 145 | |
146 | Double_t pp[5] = { p[0] | |
147 | , p[1] | |
148 | , x*p[4] - p[2] | |
149 | , p[3] | |
150 | , p[4]*cnv }; | |
151 | ||
152 | Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5]; | |
153 | Double_t c32 = x*cov[13] - cov[ 8]; | |
154 | Double_t c20 = x*cov[10] - cov[ 3]; | |
155 | Double_t c21 = x*cov[11] - cov[ 4]; | |
156 | Double_t c42 = x*cov[14] - cov[12]; | |
157 | ||
158 | Double_t cc[15] = { cov[ 0] | |
159 | , cov[ 1], cov[ 2] | |
160 | , c20, c21, c22 | |
161 | , cov[ 6], cov[ 7], c32, cov[ 9] | |
162 | , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv }; | |
163 | ||
164 | Set(x,alpha,pp,cc); | |
41702fec | 165 | Int_t ncls = 0; |
3b57a3f7 | 166 | for(int iplane=0; iplane<kNplane; iplane++){ |
41702fec | 167 | fTrackletIndex[iplane] = 0xffff; |
168 | if(!trklts[iplane].IsOK()) fTracklet[iplane] = 0x0; | |
169 | else{ | |
170 | fTracklet[iplane] = new AliTRDseedV1(trklts[iplane]); | |
171 | ncls += fTracklet[iplane]->GetN(); | |
172 | } | |
d9950a5a | 173 | } |
41702fec | 174 | AliKalmanTrack::SetNumberOfClusters(ncls); |
175 | for(int i =0; i<3; i++) fBudget[i] = 0.; | |
176 | ||
177 | Float_t pid = 1./AliPID::kSPECIES; | |
178 | for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid; | |
179 | ||
d9950a5a | 180 | } |
181 | ||
bb56afff | 182 | //_______________________________________________________________ |
3b57a3f7 | 183 | AliTRDtrackV1::~AliTRDtrackV1() |
bb56afff | 184 | { |
3b57a3f7 | 185 | if(fBackupTrack) { |
186 | delete fBackupTrack; | |
187 | } | |
188 | fBackupTrack = 0x0; | |
bb56afff | 189 | |
3b57a3f7 | 190 | if(TestBit(1)){ |
191 | for(Int_t ip=0; ip<kNplane; ip++){ | |
192 | if(fTracklet[ip]) delete fTracklet[ip]; | |
193 | fTracklet[ip] = 0x0; | |
194 | } | |
195 | } | |
196 | } | |
197 | ||
198 | //_______________________________________________________________ | |
199 | Bool_t AliTRDtrackV1::CookLabel(Float_t wrong) | |
200 | { | |
201 | // set MC label for this track | |
202 | ||
bb56afff | 203 | Int_t s[kMAXCLUSTERSPERTRACK][2]; |
204 | for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) { | |
205 | s[i][0] = -1; | |
206 | s[i][1] = 0; | |
207 | } | |
3b57a3f7 | 208 | |
bb56afff | 209 | Bool_t labelAdded; |
3b57a3f7 | 210 | Int_t label; |
211 | AliTRDcluster *c = 0x0; | |
212 | for (Int_t ip = 0; ip < kNplane; ip++) { | |
213 | if(fTrackletIndex[ip] == 0xffff) continue; | |
214 | for (Int_t ic = 0; ic < AliTRDseed::knTimebins; ic++) { | |
215 | if(!(c = fTracklet[ip]->GetClusters(ic))) continue; | |
216 | for (Int_t k = 0; k < 3; k++) { | |
217 | label = c->GetLabel(k); | |
218 | labelAdded = kFALSE; | |
219 | Int_t j = 0; | |
220 | if (label >= 0) { | |
221 | while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) { | |
222 | if ((s[j][0] == label) || | |
223 | (s[j][1] == 0)) { | |
224 | s[j][0] = label; | |
225 | s[j][1]++; | |
226 | labelAdded = kTRUE; | |
227 | } | |
228 | j++; | |
229 | } | |
230 | } | |
231 | } | |
232 | } | |
233 | } | |
234 | ||
bb56afff | 235 | Int_t max = 0; |
236 | label = -123456789; | |
237 | for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) { | |
238 | if (s[i][1] <= max) continue; | |
3b57a3f7 | 239 | max = s[i][1]; |
240 | label = s[i][0]; | |
bb56afff | 241 | } |
3b57a3f7 | 242 | |
bb56afff | 243 | if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label; |
3b57a3f7 | 244 | |
bb56afff | 245 | SetLabel(label); |
3b57a3f7 | 246 | |
247 | return kTRUE; | |
bb56afff | 248 | } |
249 | ||
d9950a5a | 250 | //_______________________________________________________________ |
251 | Bool_t AliTRDtrackV1::CookPID() | |
252 | { | |
0906e73e | 253 | // |
254 | // Cook the PID information | |
255 | // | |
3b57a3f7 | 256 | |
257 | // Reset the a priori probabilities | |
258 | Double_t pid = 1. / AliPID::kSPECIES; | |
0906e73e | 259 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) { |
3b57a3f7 | 260 | fPID[ispec] = pid; |
261 | } | |
262 | fPIDquality = 0; | |
263 | ||
264 | // steer PID calculation @ tracklet level | |
265 | Double_t *prob = 0x0; | |
266 | for(int ip=0; ip<kNplane; ip++){ | |
267 | if(fTrackletIndex[ip] == 0xffff) continue; | |
268 | if(!fTracklet[ip]->IsOK()) continue; | |
269 | if(!(prob = fTracklet[ip]->GetProbability())) return kFALSE; | |
270 | ||
271 | Int_t nspec = 0; // quality check of tracklet dEdx | |
272 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){ | |
273 | if(prob[ispec] < 0.) continue; | |
274 | fPID[ispec] *= prob[ispec]; | |
275 | nspec++; | |
276 | } | |
277 | if(!nspec) continue; | |
278 | ||
279 | fPIDquality++; | |
0906e73e | 280 | } |
0906e73e | 281 | |
282 | // no tracklet found for PID calculations | |
283 | if(!fPIDquality) return kTRUE; | |
3b57a3f7 | 284 | |
285 | // slot for PID calculation @ track level | |
286 | ||
287 | ||
0906e73e | 288 | // normalize probabilities |
289 | Double_t probTotal = 0.0; | |
290 | for (Int_t is = 0; is < AliPID::kSPECIES; is++) probTotal += fPID[is]; | |
3b57a3f7 | 291 | |
292 | ||
0906e73e | 293 | if (probTotal <= 0.0) { |
294 | AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference data."); | |
d9950a5a | 295 | return kFALSE; |
296 | } | |
3b57a3f7 | 297 | |
0906e73e | 298 | for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal; |
3b57a3f7 | 299 | |
0906e73e | 300 | return kTRUE; |
d9950a5a | 301 | } |
302 | ||
3b57a3f7 | 303 | //_____________________________________________________________________________ |
304 | Double_t AliTRDtrackV1::GetBz() const | |
0906e73e | 305 | { |
306 | // | |
3b57a3f7 | 307 | // Returns Bz component of the magnetic field (kG) |
0906e73e | 308 | // |
309 | ||
3b57a3f7 | 310 | if (AliTracker::UniformField()) return AliTracker::GetBz(); |
311 | ||
312 | Double_t r[3]; | |
313 | GetXYZ(r); | |
314 | return AliTracker::GetBz(r); | |
315 | } | |
316 | ||
317 | //_______________________________________________________________ | |
318 | Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const | |
319 | { | |
320 | Int_t n = 0; | |
321 | for(Int_t ip=0; ip<kNplane; ip++){ | |
322 | if(!fTracklet[ip]) continue; | |
323 | if(n+fTracklet[ip]->GetN() < id){ | |
324 | n+=fTracklet[ip]->GetN(); | |
325 | continue; | |
326 | } | |
327 | for(Int_t ic=34; ic>=0; ic--){ | |
328 | if(!fTracklet[ip]->GetClusters(ic)) continue; | |
329 | n++; | |
330 | if(n<id) continue; | |
331 | return fTracklet[ip]->GetIndexes(ic); | |
332 | } | |
333 | } | |
334 | return -1; | |
0906e73e | 335 | } |
d9950a5a | 336 | |
337 | //_______________________________________________________________ | |
338 | Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt) const | |
339 | { | |
340 | // | |
0906e73e | 341 | // Get the predicted chi2 |
d9950a5a | 342 | // |
3b57a3f7 | 343 | |
d9950a5a | 344 | Double_t x = trklt->GetX0(); |
345 | Double_t p[2] = { trklt->GetYat(x) | |
346 | , trklt->GetZat(x) }; | |
347 | Double_t cov[3]; | |
3b57a3f7 | 348 | trklt->GetCovAt(x, cov); |
349 | ||
d9950a5a | 350 | return AliExternalTrackParam::GetPredictedChi2(p, cov); |
3b57a3f7 | 351 | } |
d9950a5a | 352 | |
3b57a3f7 | 353 | |
354 | //_____________________________________________________________________________ | |
355 | void AliTRDtrackV1::MakeBackupTrack() | |
356 | { | |
357 | // | |
358 | // Creates a backup track | |
359 | // | |
360 | ||
361 | if(fBackupTrack) { | |
362 | fBackupTrack->~AliTRDtrackV1(); | |
363 | new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this)); | |
592fdd48 | 364 | return; |
3b57a3f7 | 365 | } |
366 | fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this)); | |
d9950a5a | 367 | } |
368 | ||
3b57a3f7 | 369 | //_____________________________________________________________________________ |
370 | Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z) | |
371 | { | |
372 | // | |
373 | // Find a prolongation at given x | |
374 | // Return 0 if it does not exist | |
375 | // | |
376 | ||
377 | Double_t bz = GetBz(); | |
378 | if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return 0; | |
379 | if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return 0; | |
380 | ||
381 | return 1; | |
382 | ||
383 | } | |
384 | ||
385 | //_____________________________________________________________________________ | |
386 | Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho) | |
0906e73e | 387 | { |
388 | // | |
3b57a3f7 | 389 | // Propagates this track to a reference plane defined by "xk" [cm] |
390 | // correcting for the mean crossed material. | |
0906e73e | 391 | // |
3b57a3f7 | 392 | // "xx0" - thickness/rad.length [units of the radiation length] |
393 | // "xrho" - thickness*density [g/cm^2] | |
394 | // | |
0906e73e | 395 | |
3b57a3f7 | 396 | if (xk == GetX()) { |
397 | return kTRUE; | |
398 | } | |
399 | ||
400 | Double_t oldX = GetX(); | |
401 | Double_t oldY = GetY(); | |
402 | Double_t oldZ = GetZ(); | |
403 | ||
404 | Double_t bz = GetBz(); | |
405 | ||
406 | if (!AliExternalTrackParam::PropagateTo(xk,bz)) { | |
407 | return kFALSE; | |
408 | } | |
409 | ||
410 | Double_t x = GetX(); | |
411 | Double_t y = GetY(); | |
412 | Double_t z = GetZ(); | |
413 | ||
414 | if (oldX < xk) { | |
415 | xrho = -xrho; | |
416 | if (IsStartedTimeIntegral()) { | |
417 | Double_t l2 = TMath::Sqrt((x-oldX)*(x-oldX) | |
418 | + (y-oldY)*(y-oldY) | |
419 | + (z-oldZ)*(z-oldZ)); | |
420 | Double_t crv = AliExternalTrackParam::GetC(bz); | |
421 | if (TMath::Abs(l2*crv) > 0.0001) { | |
422 | // Make correction for curvature if neccesary | |
423 | l2 = 0.5 * TMath::Sqrt((x-oldX)*(x-oldX) | |
424 | + (y-oldY)*(y-oldY)); | |
425 | l2 = 2.0 * TMath::ASin(l2 * crv) / crv; | |
426 | l2 = TMath::Sqrt(l2*l2 + (z-oldZ)*(z-oldZ)); | |
427 | } | |
428 | AddTimeStep(l2); | |
429 | } | |
430 | } | |
431 | ||
432 | if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0,xrho,GetMass())) { | |
433 | return kFALSE; | |
434 | } | |
435 | ||
436 | { | |
437 | ||
438 | // Energy losses | |
439 | Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt()); | |
440 | Double_t beta2 = p2 / (p2 + GetMass()*GetMass()); | |
441 | if ((beta2 < 1.0e-10) || | |
442 | ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) { | |
443 | return kFALSE; | |
444 | } | |
445 | ||
446 | Double_t dE = 0.153e-3 / beta2 | |
447 | * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2) | |
448 | * xrho; | |
449 | fBudget[0] += xrho; | |
450 | ||
451 | /* | |
452 | // Suspicious part - think about it ? | |
453 | Double_t kinE = TMath::Sqrt(p2); | |
454 | if (dE > 0.8*kinE) dE = 0.8 * kinE; // | |
455 | if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch | |
456 | */ | |
457 | ||
458 | fDE += dE; | |
459 | ||
460 | /* | |
461 | // Suspicious ! I.B. | |
462 | Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation | |
463 | Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2); | |
464 | fCcc += sigmac2; | |
465 | fCee += fX*fX * sigmac2; | |
466 | */ | |
467 | ||
468 | } | |
469 | ||
470 | return kTRUE; | |
0906e73e | 471 | } |
3b57a3f7 | 472 | |
87a7fa94 | 473 | //_____________________________________________________________________________ |
3b57a3f7 | 474 | Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step) |
87a7fa94 | 475 | { |
476 | // | |
3b57a3f7 | 477 | // Propagate track to the radial position |
478 | // Rotation always connected to the last track position | |
87a7fa94 | 479 | // |
480 | ||
3b57a3f7 | 481 | Double_t xyz0[3]; |
482 | Double_t xyz1[3]; | |
483 | Double_t y; | |
484 | Double_t z; | |
485 | ||
486 | Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY()); | |
487 | // Direction +- | |
488 | Double_t dir = (radius > r) ? -1.0 : 1.0; | |
489 | ||
490 | for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) { | |
491 | ||
492 | GetXYZ(xyz0); | |
493 | Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]); | |
494 | Rotate(alpha,kTRUE); | |
495 | GetXYZ(xyz0); | |
496 | GetProlongation(x,y,z); | |
497 | xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha); | |
498 | xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha); | |
499 | xyz1[2] = z; | |
500 | Double_t param[7]; | |
501 | AliTracker::MeanMaterialBudget(xyz0,xyz1,param); | |
502 | if (param[1] <= 0) { | |
503 | param[1] = 100000000; | |
504 | } | |
505 | PropagateTo(x,param[1],param[0]*param[4]); | |
506 | ||
507 | } | |
508 | ||
509 | GetXYZ(xyz0); | |
510 | Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]); | |
511 | Rotate(alpha,kTRUE); | |
512 | GetXYZ(xyz0); | |
513 | GetProlongation(r,y,z); | |
514 | xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha); | |
515 | xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha); | |
516 | xyz1[2] = z; | |
517 | Double_t param[7]; | |
518 | AliTracker::MeanMaterialBudget(xyz0,xyz1,param); | |
519 | ||
520 | if (param[1] <= 0) { | |
521 | param[1] = 100000000; | |
87a7fa94 | 522 | } |
3b57a3f7 | 523 | PropagateTo(r,param[1],param[0]*param[4]); |
524 | ||
525 | return 0; | |
526 | ||
87a7fa94 | 527 | } |
528 | ||
3b57a3f7 | 529 | //_____________________________________________________________________________ |
530 | Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute) | |
531 | { | |
532 | // | |
533 | // Rotates track parameters in R*phi plane | |
534 | // if absolute rotation alpha is in global system | |
535 | // otherwise alpha rotation is relative to the current rotation angle | |
536 | // | |
537 | ||
538 | if (absolute) alpha -= GetAlpha(); | |
539 | //else fNRotate++; | |
540 | ||
541 | return AliExternalTrackParam::Rotate(GetAlpha()+alpha); | |
542 | } | |
87a7fa94 | 543 | |
eb38ed55 | 544 | //___________________________________________________________ |
545 | void AliTRDtrackV1::SetNumberOfClusters() | |
546 | { | |
547 | // Calculate the number of clusters attached to this track | |
548 | ||
3b57a3f7 | 549 | Int_t ncls = 0; |
550 | for(int ip=0; ip<kNplane; ip++){ | |
551 | if(fTracklet[ip] && fTrackletIndex[ip] != 0xffff) ncls += fTracklet[ip]->GetN(); | |
552 | } | |
553 | AliKalmanTrack::SetNumberOfClusters(ncls); | |
eb38ed55 | 554 | } |
555 | ||
556 | ||
0906e73e | 557 | //_______________________________________________________________ |
3b57a3f7 | 558 | void AliTRDtrackV1::SetOwner() |
0906e73e | 559 | { |
560 | // | |
561 | // Toggle ownership of tracklets | |
562 | // | |
563 | ||
3b57a3f7 | 564 | if(TestBit(1)) return; |
565 | for (Int_t ip = 0; ip < kNplane; ip++) { | |
566 | if(fTrackletIndex[ip] == 0xffff) continue; | |
567 | fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]); | |
568 | fTracklet[ip]->SetOwner(); | |
569 | } | |
570 | SetBit(1); | |
0906e73e | 571 | } |
572 | ||
d9950a5a | 573 | //_______________________________________________________________ |
3b57a3f7 | 574 | void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *trklt, Int_t index) |
d9950a5a | 575 | { |
576 | // | |
0906e73e | 577 | // Set the tracklets |
d9950a5a | 578 | // |
3b57a3f7 | 579 | Int_t plane = trklt->GetPlane(); |
41702fec | 580 | if(fTrackletIndex[plane]==0xffff && fTracklet[plane]){ |
581 | delete fTracklet[plane]; | |
582 | } | |
3b57a3f7 | 583 | fTracklet[plane] = trklt; |
584 | fTrackletIndex[plane] = index; | |
d9950a5a | 585 | } |
586 | ||
587 | //_______________________________________________________________ | |
0906e73e | 588 | Bool_t AliTRDtrackV1::Update(AliTRDseedV1 *trklt, Double_t chisq) |
d9950a5a | 589 | { |
590 | // | |
3b57a3f7 | 591 | // Update track and tracklet parameters |
d9950a5a | 592 | // |
3b57a3f7 | 593 | |
0906e73e | 594 | Double_t x = trklt->GetX0(); |
d9950a5a | 595 | Double_t p[2] = { trklt->GetYat(x) |
596 | , trklt->GetZat(x) }; | |
597 | Double_t cov[3]; | |
3b57a3f7 | 598 | trklt->GetCovAt(x, cov); |
599 | ||
3afdab72 | 600 | // insert systematic uncertainties calibration and misalignment |
601 | Double_t sys[15]; | |
602 | AliTRDReconstructor::RecoParam()->GetSysCovMatrix(sys); | |
603 | cov[0] += (sys[0]*sys[0]); | |
604 | cov[2] += (sys[1]*sys[1]); | |
605 | ||
d9950a5a | 606 | if(!AliExternalTrackParam::Update(p, cov)) return kFALSE; |
3b57a3f7 | 607 | |
608 | AliTRDcluster *c = 0x0; | |
609 | Int_t ic = 0; while(!(c = trklt->GetClusters(ic))) ic++; | |
610 | AliTracker::FillResiduals(this, p, cov, c->GetVolumeId()); | |
611 | ||
612 | ||
d9950a5a | 613 | // Register info to track |
3b57a3f7 | 614 | SetNumberOfClusters(); |
d9950a5a | 615 | SetChi2(GetChi2() + chisq); |
3b57a3f7 | 616 | |
617 | // update tracklet | |
618 | trklt->SetMomentum(GetP()); | |
619 | trklt->SetSnp(GetSnp()); | |
620 | trklt->SetTgl(GetTgl()); | |
621 | return kTRUE; | |
d9950a5a | 622 | } |
623 | ||
624 | //_______________________________________________________________ | |
0906e73e | 625 | void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track) |
d9950a5a | 626 | { |
627 | // | |
6984f7c1 | 628 | // Update the TRD PID information in the ESD track |
d9950a5a | 629 | // |
6984f7c1 | 630 | |
631 | track->SetNumberOfTRDslices(kNslice); | |
3b57a3f7 | 632 | |
6984f7c1 | 633 | for (Int_t ip = 0; ip < kNplane; ip++) { |
3b57a3f7 | 634 | if(fTrackletIndex[ip] == 0xffff) continue; |
635 | fTracklet[ip]->CookdEdx(kNslice); | |
636 | Float_t *dedx = fTracklet[ip]->GetdEdx(); | |
637 | for (Int_t js = 0; js < kNslice; js++) track->SetTRDslice(dedx[js], ip, js); | |
6984f7c1 | 638 | } |
0906e73e | 639 | |
6984f7c1 | 640 | // copy PID to ESD |
641 | track->SetTRDpid(fPID); | |
642 | track->SetTRDpidQuality(fPIDquality); | |
d9950a5a | 643 | } |