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7356f978 | 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 | // | |
18 | // This class works as generic interface to an event. | |
19 | // Its main purpose is to provide a unique reference which includes all the | |
20 | // facilities available in the AliVEvent generic base class, plus all info | |
21 | // which could be needed during analysis, which are not in AliVEvent but | |
22 | // need to be accessed from ESD or AOD objects, usually in different ways. | |
23 | // When MC is available, it is properly taken into account. | |
61f275d1 | 24 | // |
7356f978 | 25 | // authors: A. Pulvirenti (alberto.pulvirenti@ct.infn.it) |
26 | // M. Vala (martin.vala@cern.ch) | |
27 | // | |
28 | //////////////////////////////////////////////////////////////////////////////// | |
29 | ||
30 | #include <Riostream.h> | |
4fbb2459 | 31 | #include <TArrayF.h> |
0dffcc8a | 32 | |
4fbb2459 | 33 | #include "AliGenEventHeader.h" |
f34f960b | 34 | |
35 | #include "AliRsnCutSet.h" | |
0dffcc8a | 36 | #include "AliRsnEvent.h" |
37 | ||
aec0ec32 | 38 | ClassImp(AliRsnEvent) |
0dffcc8a | 39 | |
7c2974c8 | 40 | //_____________________________________________________________________________ |
a378358c | 41 | AliRsnEvent::AliRsnEvent(AliVEvent *ref, AliVEvent *refMC) : |
2a1c7696 | 42 | fRef(ref), |
43 | fRefMC(refMC), | |
44 | fLeading(-1), | |
b63357a0 | 45 | fPID(0x0), |
46 | fAODList(0x0) | |
2f769150 | 47 | { |
06351446 | 48 | // |
4fbb2459 | 49 | // Default constructor. |
06351446 | 50 | // |
0dffcc8a | 51 | } |
7c2974c8 | 52 | |
53 | //_____________________________________________________________________________ | |
aec0ec32 | 54 | AliRsnEvent::AliRsnEvent(const AliRsnEvent &event) : |
2a1c7696 | 55 | TObject(event), |
56 | fRef(event.fRef), | |
57 | fRefMC(event.fRefMC), | |
58 | fLeading(event.fLeading), | |
b63357a0 | 59 | fPID(event.fPID), |
60 | fAODList(event.fAODList) | |
2f769150 | 61 | { |
06351446 | 62 | // |
0dffcc8a | 63 | // Copy constructor. |
06351446 | 64 | // |
2f769150 | 65 | } |
7c2974c8 | 66 | |
67 | //_____________________________________________________________________________ | |
61f275d1 | 68 | AliRsnEvent &AliRsnEvent::operator= (const AliRsnEvent &event) |
0dffcc8a | 69 | { |
06351446 | 70 | // |
71 | // Works in the same way as the copy constructor. | |
72 | // | |
3da8cef7 | 73 | |
f34f960b | 74 | TObject::operator=(event); |
61f275d1 | 75 | if (this == &event) |
76 | return *this; | |
2a1c7696 | 77 | fRef = event.fRef; |
78 | fRefMC = event.fRefMC; | |
79 | fLeading = event.fLeading; | |
c865cb1d | 80 | fPID = event.fPID; |
b63357a0 | 81 | fAODList = event.fAODList; |
5eb970a4 | 82 | |
2a1c7696 | 83 | return (*this); |
0dffcc8a | 84 | } |
7c2974c8 | 85 | |
5faf5a07 | 86 | //_____________________________________________________________________________ |
87 | AliRsnEvent::~AliRsnEvent() | |
88 | { | |
89 | // | |
f34f960b | 90 | // Destructor (does nothing since there are not owned pointers) |
5faf5a07 | 91 | // |
5faf5a07 | 92 | } |
93 | ||
06351446 | 94 | //_____________________________________________________________________________ |
f34f960b | 95 | void AliRsnEvent::SetDaughter(AliRsnDaughter &out, Int_t index, Bool_t fromMC) |
06351446 | 96 | { |
97 | // | |
f34f960b | 98 | // Assigns to the first argument the reference to the i-th track in the ref event. |
99 | // What assignment method to be used will depend on the index and on the type of input. | |
100 | // If the last argument is kTRUE and an MC is referenced, then both fRef and fRefMC will | |
101 | // point to the MC particle (pure MC analysis) | |
06351446 | 102 | // |
2a1c7696 | 103 | |
f34f960b | 104 | // by default the daughter is reset |
105 | // and assigned the used index | |
d7712d44 | 106 | out.Reset(); |
f34f960b | 107 | out.SetRsnID(index); |
d7712d44 | 108 | out.SetOwnerEvent(this); |
61f275d1 | 109 | |
f34f960b | 110 | // check input type |
111 | if (!InputOK()) return; | |
112 | Bool_t inputESD = IsESD(); | |
cceb9957 | 113 | |
cceb9957 | 114 | // if it is pure MC, the index tells what particle |
115 | // to be read in the stack of MC particles, otherwise | |
116 | // it is converted into a real collection index | |
3da8cef7 | 117 | if (fromMC) { |
118 | out.SetLabel(index); | |
119 | Bool_t ok = (inputESD ? SetMCInfoESD(out) : SetMCInfoAOD(out)); | |
120 | if (ok) { | |
121 | out.SetGood(); | |
122 | out.SetRef(out.GetRefMC()); | |
123 | } | |
124 | } else { | |
125 | Int_t trueIndex; | |
126 | AliRsnDaughter::ERefType type; | |
127 | if (!ConvertAbsoluteIndex(index, trueIndex, type)) { | |
128 | AliError(Form("Failed to convert absolute index %d", index)); | |
129 | return; | |
130 | } | |
131 | switch (type) { | |
132 | case AliRsnDaughter::kTrack: | |
133 | if (inputESD) SetDaughterESDtrack(out, trueIndex); else SetDaughterAODtrack(out, trueIndex); | |
134 | break; | |
135 | case AliRsnDaughter::kV0: | |
136 | if (inputESD) SetDaughterESDv0(out, trueIndex); else SetDaughterAODv0(out, trueIndex); | |
137 | break; | |
138 | case AliRsnDaughter::kCascade: | |
139 | if (inputESD) SetDaughterESDcascade(out, trueIndex); else SetDaughterAODcascade(out, trueIndex); | |
140 | break; | |
141 | default: | |
142 | AliError("Unrecognized daughter type"); | |
143 | return; | |
144 | } | |
145 | } | |
7356f978 | 146 | } |
147 | ||
148 | //_____________________________________________________________________________ | |
f34f960b | 149 | AliRsnDaughter AliRsnEvent::GetDaughter(Int_t i, Bool_t fromMC) |
7356f978 | 150 | { |
151 | // | |
f34f960b | 152 | // Returns a daughter set using same criteria as SetDaughter |
7356f978 | 153 | // |
154 | ||
f34f960b | 155 | AliRsnDaughter d; |
156 | SetDaughter(d, i, fromMC); | |
157 | return d; | |
158 | } | |
7356f978 | 159 | |
f34f960b | 160 | //_____________________________________________________________________________ |
161 | void AliRsnEvent::SetDaughterESDtrack(AliRsnDaughter &out, Int_t i) | |
162 | { | |
163 | // | |
164 | // Setup the first argument to the track identified by the index. | |
165 | // When available, adds the MC information and references. | |
166 | // --- | |
167 | // Version #1: ESD tracks | |
168 | // | |
169 | ||
61f275d1 | 170 | AliESDEvent *esd = (AliESDEvent *)fRef; |
171 | ||
f34f960b | 172 | if (i >= 0 && i < esd->GetNumberOfTracks()) { |
173 | AliESDtrack *track = esd->GetTrack(i); | |
174 | if (track) { | |
175 | out.SetRef(track); | |
176 | out.SetGood(); | |
177 | // if MC is present, assign label and retrieve corresponding particle | |
178 | if (fRefMC) { | |
179 | out.SetLabel(TMath::Abs(track->GetLabel())); | |
180 | if (!SetMCInfoESD(out)) { | |
181 | AliWarning("Failed assignment of MC info"); | |
182 | } | |
183 | } | |
184 | } else { | |
185 | AliWarning("Null track"); | |
186 | } | |
187 | } else { | |
188 | AliWarning(Form("Overflow: required index = %d, max = %d", i, esd->GetNumberOfTracks())); | |
7356f978 | 189 | } |
e0baff8c | 190 | } |
191 | ||
2e521c29 | 192 | //_____________________________________________________________________________ |
f34f960b | 193 | void AliRsnEvent::SetDaughterAODtrack(AliRsnDaughter &out, Int_t i) |
2e521c29 | 194 | { |
195 | // | |
f34f960b | 196 | // Setup the first argument to the track identified by the index. |
197 | // When available, adds the MC information and references. | |
198 | // --- | |
199 | // Version #2: AOD tracks | |
2e521c29 | 200 | // |
201 | ||
61f275d1 | 202 | AliAODEvent *aod = (AliAODEvent *)fRef; |
2a1c7696 | 203 | |
f34f960b | 204 | if (i >= 0 && i < aod->GetNumberOfTracks()) { |
205 | AliAODTrack *track = aod->GetTrack(i); | |
206 | if (track) { | |
207 | out.SetRef(track); | |
208 | out.SetGood(); | |
209 | // if MC is present, assign label and retrieve corresponding particle | |
210 | if (fRefMC) { | |
211 | out.SetLabel(TMath::Abs(track->GetLabel())); | |
212 | if (!SetMCInfoAOD(out)) { | |
213 | AliWarning("Failed assignment of MC info"); | |
214 | } | |
215 | } | |
216 | } else { | |
217 | AliWarning("Null track"); | |
2a1c7696 | 218 | } |
f34f960b | 219 | } else { |
220 | AliWarning(Form("Overflow: required index = %d, max = %d", i, aod->GetNumberOfTracks())); | |
2a1c7696 | 221 | } |
f34f960b | 222 | } |
223 | ||
224 | //_____________________________________________________________________________ | |
225 | void AliRsnEvent::SetDaughterESDv0(AliRsnDaughter &out, Int_t i) | |
226 | { | |
227 | // | |
228 | // Setup the first argument to the track identified by the index. | |
229 | // When available, adds the MC information and references. | |
230 | // --- | |
231 | // Version #3: ESD v0 | |
232 | // | |
2a1c7696 | 233 | |
f34f960b | 234 | if (i >= 0 && i < fRef->GetNumberOfV0s()) { |
235 | AliESDEvent *ev = GetRefESD(); | |
236 | AliESDv0 *v0 = ev->GetV0(i); | |
237 | if (v0) { | |
238 | out.SetRef(v0); | |
239 | out.SetGood(); | |
240 | // if MC is present, retrieve the label of V0 from those of daughters | |
241 | if (fRefMC) { | |
61f275d1 | 242 | AliMCEvent *mc = (AliMCEvent *)fRefMC; |
f34f960b | 243 | AliESDtrack *tp = ev->GetTrack(v0->GetPindex()); |
244 | AliESDtrack *tn = ev->GetTrack(v0->GetNindex()); | |
245 | if (mc && tp && tn) { | |
246 | Int_t lp = TMath::Abs(tp->GetLabel()); | |
247 | Int_t ln = TMath::Abs(tn->GetLabel()); | |
248 | TParticle *pp = mc->Stack()->Particle(lp); | |
249 | TParticle *pn = mc->Stack()->Particle(ln); | |
250 | if (pp && pn) { | |
74d60285 | 251 | // if their first mothers are the same, the V0 is true |
252 | // otherwise label remains '-1' --> fake V0 | |
253 | if (pp->GetFirstMother() == pn->GetFirstMother() && pp->GetFirstMother() >= 0) { | |
254 | out.SetLabel(pp->GetFirstMother()); | |
255 | //patch for k0s/k0l | |
256 | TParticle *mom = mc->Stack()->Particle(pn->GetFirstMother()); | |
257 | if(mom->GetPdgCode() == 310) { | |
258 | //take the mother of the k0s which is a k0 (311) | |
259 | out.SetLabel(mom->GetFirstMother()); | |
260 | } | |
261 | SetMCInfoESD(out); | |
262 | } | |
f34f960b | 263 | } |
264 | } | |
265 | } | |
2a1c7696 | 266 | } |
f34f960b | 267 | } |
268 | } | |
269 | ||
270 | //_____________________________________________________________________________ | |
271 | void AliRsnEvent::SetDaughterAODv0(AliRsnDaughter &out, Int_t i) | |
272 | { | |
273 | // | |
274 | // Setup the first argument to the track identified by the index. | |
275 | // When available, adds the MC information and references. | |
276 | // --- | |
277 | // Version #4: AOD v0 | |
278 | // | |
2a1c7696 | 279 | |
f34f960b | 280 | if (i >= 0 && i < fRef->GetNumberOfV0s()) { |
61f275d1 | 281 | AliAODEvent *ev = (AliAODEvent *)fRef; |
f34f960b | 282 | AliAODv0 *v0 = ev->GetV0(i); |
283 | if (v0) { | |
284 | out.SetRef(v0); | |
285 | out.SetGood(); | |
286 | if (fRefMC) { | |
61f275d1 | 287 | AliAODEvent *mc = (AliAODEvent *)fRefMC; |
288 | TClonesArray *mcArray = (TClonesArray *)mc->GetList()->FindObject(AliAODMCParticle::StdBranchName()); | |
289 | AliAODTrack *tp = (AliAODTrack *)v0->GetDaughter(0); | |
290 | AliAODTrack *tn = (AliAODTrack *)v0->GetDaughter(1); | |
f34f960b | 291 | if (mcArray && tp && tn) { |
292 | Int_t lp = TMath::Abs(tp->GetLabel()); | |
293 | Int_t ln = TMath::Abs(tn->GetLabel()); | |
61f275d1 | 294 | AliAODMCParticle *pp = (AliAODMCParticle *)mcArray->At(lp); |
295 | AliAODMCParticle *pn = (AliAODMCParticle *)mcArray->At(ln); | |
f34f960b | 296 | if (pp && pn) { |
297 | // if their first mothers are the same, the V0 is true | |
298 | // otherwise label remains '-1' --> fake V0 | |
299 | if (pp->GetMother() == pn->GetMother() && pp->GetMother() >= 0) { | |
300 | out.SetLabel(pp->GetMother()); | |
74d60285 | 301 | SetMCInfoAOD(out); |
f34f960b | 302 | } |
303 | } | |
2a1c7696 | 304 | } |
2a1c7696 | 305 | } |
a378358c | 306 | } |
2a1c7696 | 307 | } |
f34f960b | 308 | } |
2a1c7696 | 309 | |
f34f960b | 310 | //_____________________________________________________________________________ |
311 | void AliRsnEvent::SetDaughterESDcascade(AliRsnDaughter &out, Int_t i) | |
312 | { | |
313 | // | |
314 | // Setup the first argument to the track identified by the index. | |
315 | // When available, adds the MC information and references. | |
316 | // --- | |
317 | // Version #3: ESD cascade | |
318 | // | |
319 | ||
320 | if (i >= 0 && i < fRef->GetNumberOfCascades()) { | |
321 | AliESDEvent *ev = GetRefESD(); | |
322 | AliESDcascade *casc = ev->GetCascade(i); | |
323 | if (casc) { | |
324 | out.SetRef(casc); | |
325 | out.SetGood(); | |
326 | if (fRefMC) { | |
61f275d1 | 327 | |
f34f960b | 328 | } |
329 | } | |
330 | } | |
2e521c29 | 331 | } |
332 | ||
15d5fd02 | 333 | //_____________________________________________________________________________ |
f34f960b | 334 | void AliRsnEvent::SetDaughterAODcascade(AliRsnDaughter &out, Int_t i) |
15d5fd02 | 335 | { |
336 | // | |
f34f960b | 337 | // Setup the first argument to the track identified by the index. |
338 | // When available, adds the MC information and references. | |
339 | // --- | |
340 | // Version #4: AOD cascade | |
15d5fd02 | 341 | // |
2a1c7696 | 342 | |
f34f960b | 343 | if (i >= 0 && i < fRef->GetNumberOfCascades()) { |
344 | AliAODEvent *ev = GetRefAOD(); | |
345 | AliAODv0 *casc = ev->GetCascade(i); | |
346 | if (casc) { | |
347 | out.SetRef(casc); | |
348 | out.SetGood(); | |
349 | if (fRefMC) { | |
61f275d1 | 350 | |
f34f960b | 351 | } |
352 | } | |
353 | } | |
15d5fd02 | 354 | } |
355 | ||
7356f978 | 356 | //_____________________________________________________________________________ |
f34f960b | 357 | Bool_t AliRsnEvent::SetMCInfoESD(AliRsnDaughter &out) |
7356f978 | 358 | { |
359 | // | |
f34f960b | 360 | // Using the label assigned to the daughter, searches for the MC informations: |
361 | // -- MC reference | |
362 | // -- mother | |
7356f978 | 363 | // |
364 | ||
f34f960b | 365 | // if label makes no sense --> failed |
366 | Int_t label = out.GetLabel(); | |
367 | if (label < 0 || !fRefMC) return kFALSE; | |
61f275d1 | 368 | |
f34f960b | 369 | // get number of particles |
370 | Int_t nMC = fRefMC->GetNumberOfTracks(); | |
61f275d1 | 371 | |
f34f960b | 372 | // if label too large --> failed |
373 | if (label >= nMC) { | |
374 | AliWarning(Form("Stack overflow: track label = %d -- stack maximum = %d", label, nMC)); | |
375 | return kFALSE; | |
376 | } | |
377 | ||
378 | // retrieve particle | |
61f275d1 | 379 | AliMCEvent *mc = (AliMCEvent *)fRefMC; |
380 | AliMCParticle *mcPart = (AliMCParticle *)mc->GetTrack(label); | |
381 | ||
f34f960b | 382 | // if particle = NULL --> failed |
383 | if (!mcPart) { | |
384 | AliWarning(Form("Stack discontinuity: label %d refers to a NULL object", label)); | |
385 | return kFALSE; | |
386 | } | |
387 | // otherwise --> success | |
388 | out.SetRefMC(mcPart); | |
389 | ||
390 | // if the particle is not primary, find the mother and get its PDG | |
391 | Int_t imum = mcPart->Particle()->GetFirstMother(); | |
392 | if (imum >= 0 && imum < nMC) { | |
61f275d1 | 393 | AliMCParticle *mcMother = (AliMCParticle *)mc->GetTrack(imum); |
f34f960b | 394 | if (mcMother) { |
3da8cef7 | 395 | out.SetMotherPDG(mcMother->Particle()->GetPdgCode()); |
f34f960b | 396 | } else { |
397 | AliWarning(Form("Stack discontinuity: label mother %d refers to a NULL object", imum)); | |
398 | } | |
399 | } else { | |
400 | AliWarning(Form("Stack overflow: mother label = %d -- stack maximum = %d", imum, nMC)); | |
401 | } | |
402 | ||
403 | return kTRUE; | |
7356f978 | 404 | } |
405 | ||
2e521c29 | 406 | //_____________________________________________________________________________ |
f34f960b | 407 | Bool_t AliRsnEvent::SetMCInfoAOD(AliRsnDaughter &out) |
2e521c29 | 408 | { |
409 | // | |
f34f960b | 410 | // Using the label assigned to the daughter, searches for the MC informations: |
411 | // -- MC reference | |
412 | // -- mother | |
2e521c29 | 413 | // |
2a1c7696 | 414 | |
f34f960b | 415 | // if label makes no sense --> failed |
416 | Int_t label = out.GetLabel(); | |
417 | if (label < 0 || !fRefMC) return kFALSE; | |
61f275d1 | 418 | |
f34f960b | 419 | // retrieve particle |
61f275d1 | 420 | AliAODEvent *mc = (AliAODEvent *)fRefMC; |
421 | TClonesArray *mcArray = (TClonesArray *)mc->GetList()->FindObject(AliAODMCParticle::StdBranchName()); | |
422 | ||
f34f960b | 423 | // get number of particles |
424 | Int_t nMC = mcArray->GetEntriesFast(); | |
61f275d1 | 425 | |
f34f960b | 426 | // if label too large --> failed |
427 | if (label >= nMC) { | |
428 | AliWarning(Form("Stack overflow: track label = %d -- stack maximum = %d", label, nMC)); | |
429 | return kFALSE; | |
430 | } | |
61f275d1 | 431 | |
f34f960b | 432 | // if particle = NULL --> failed |
61f275d1 | 433 | AliAODMCParticle *mcPart = (AliAODMCParticle *)mcArray->At(label); |
f34f960b | 434 | if (!mcPart) { |
435 | AliWarning(Form("Stack discontinuity: label %d refers to a NULL object", label)); | |
436 | return kFALSE; | |
437 | } | |
438 | // otherwise --> success | |
439 | out.SetRefMC(mcPart); | |
440 | ||
441 | // if the particle is not primary, find the mother and get its PDG | |
442 | Int_t imum = mcPart->GetMother(); | |
443 | if (imum >= 0 && imum < nMC) { | |
61f275d1 | 444 | AliAODMCParticle *mcMother = (AliAODMCParticle *)mcArray->At(imum); |
f34f960b | 445 | if (mcMother) { |
3da8cef7 | 446 | out.SetMotherPDG(mcMother->GetPdgCode()); |
f34f960b | 447 | } else { |
448 | AliWarning(Form("Stack discontinuity: label mother %d refers to a NULL object", imum)); | |
449 | } | |
450 | } else if (imum >= nMC) { | |
451 | AliWarning(Form("Stack overflow: mother label = %d -- stack maximum = %d", imum, nMC)); | |
452 | } | |
453 | ||
454 | return kTRUE; | |
2e521c29 | 455 | } |
456 | ||
32992791 | 457 | //_____________________________________________________________________________ |
458 | Bool_t AliRsnEvent::ConvertAbsoluteIndex(Int_t index, Int_t &realIndex, AliRsnDaughter::ERefType &type) | |
459 | { | |
460 | // | |
461 | // Using the phylosophy of the absolute index, which loops over | |
462 | // all tracks, V0s and cascades, returns the result of a check | |
463 | // on it (first argument) based on this criterion: | |
464 | // 1) if the absolute ID is smaller than number of tracks, | |
465 | // return itself and the type 'track' | |
466 | // 2) if the absolute ID is larger than number of tracks, subtract it | |
467 | // and if the result is smaller than number of V0s, | |
468 | // return the corresponding V0 index and type | |
469 | // 3) if the absolute ID is larger than number of tracks + V0s, subtract them | |
470 | // and if the result is smaller than number of cascades, | |
471 | // return the corresponding cascade index and type | |
472 | // The results of this check are stored in the reference arguments, while the outcome of | |
473 | // the function is kTRUE if one of these checks was successful, otherwise it is kFALSE, | |
474 | // meaning that the absolute index reached the end. | |
475 | // | |
476 | ||
2a1c7696 | 477 | Int_t nTracks = fRef->GetNumberOfTracks(); |
478 | Int_t nV0s = fRef->GetNumberOfV0s(); | |
479 | Int_t nCascades = fRef->GetNumberOfCascades(); | |
480 | ||
481 | if (index < nTracks) { | |
482 | realIndex = index; | |
483 | type = AliRsnDaughter::kTrack; | |
484 | return kTRUE; | |
485 | } else if (index >= nTracks && index < nTracks + nV0s) { | |
486 | realIndex = index - nTracks; | |
487 | type = AliRsnDaughter::kV0; | |
488 | return kTRUE; | |
489 | } else if (index >= nTracks + nV0s && index < nTracks + nV0s + nCascades) { | |
490 | realIndex = index - nTracks - nV0s; | |
491 | type = AliRsnDaughter::kCascade; | |
492 | return kTRUE; | |
493 | } | |
494 | ||
495 | realIndex = -1; | |
496 | type = AliRsnDaughter::kNoType; | |
497 | return kFALSE; | |
32992791 | 498 | } |
499 | ||
7356f978 | 500 | //_____________________________________________________________________________ |
501 | Int_t AliRsnEvent::ConvertRealIndex(Int_t index, AliRsnDaughter::ERefType type) | |
502 | { | |
503 | // | |
504 | // Translates a pair made by index + object type into the corresponding | |
505 | // absolute index, which is set to -1 in case the real index overflows. | |
506 | // | |
507 | ||
508 | Int_t nTracks = fRef->GetNumberOfTracks(); | |
509 | Int_t nV0s = fRef->GetNumberOfV0s(); | |
510 | Int_t nCascades = fRef->GetNumberOfCascades(); | |
511 | ||
512 | switch (type) { | |
513 | case AliRsnDaughter::kTrack: | |
514 | if (index >= 0 && index < nTracks) | |
515 | return index; | |
516 | else | |
517 | return -1; | |
518 | case AliRsnDaughter::kV0: | |
519 | if (index >= 0 && index < nV0s) | |
520 | return nTracks + index; | |
521 | else | |
522 | return -1; | |
523 | case AliRsnDaughter::kCascade: | |
524 | if (index >= 0 && index < nCascades) | |
525 | return nTracks + nV0s + index; | |
526 | else | |
527 | return -1; | |
528 | default: | |
529 | return -1; | |
530 | } | |
531 | } | |
532 | ||
7c2974c8 | 533 | //_____________________________________________________________________________ |
f34f960b | 534 | Int_t AliRsnEvent::SelectLeadingParticle(AliRsnCutSet *cuts) |
78b94cbd | 535 | { |
536 | // | |
537 | // Searches the collection of all particles with given PID type and charge, | |
538 | // and returns the one with largest momentum, provided that it is greater than 1st argument. | |
539 | // If one specifies AliRsnPID::kUnknown as type or AliRsnDaughter::kNoPID as method, | |
540 | // the check is done over all particles irrespectively of their PID. | |
541 | // If the sign argument is '+' or '-', the check is done over the particles of that charge, | |
542 | // otherwise it is done irrespectively of the charge. | |
543 | // | |
544 | ||
f34f960b | 545 | // check input type |
546 | Bool_t inputESD = IsESD(); | |
547 | if (!inputESD && !IsAOD()) { | |
548 | AliError("Need to process ESD or AOD input"); | |
549 | return -1; | |
550 | } | |
551 | ||
552 | Double_t ptMax = 0.0; | |
2a1c7696 | 553 | Int_t i, nTracks = fRef->GetNumberOfTracks(); |
61f275d1 | 554 | |
2a1c7696 | 555 | fLeading = -1; |
556 | AliRsnDaughter leading; | |
2a1c7696 | 557 | |
558 | for (i = 0; i < nTracks; i++) { | |
f34f960b | 559 | if (inputESD) |
560 | SetDaughterESDtrack(leading, i); | |
561 | else | |
562 | SetDaughterAODtrack(leading, i); | |
563 | if (!leading.IsOK()) { | |
564 | AliDebugClass(1, Form("Failed assignment of track %d", i)); | |
565 | continue; | |
2a1c7696 | 566 | } |
f34f960b | 567 | if (cuts && !cuts->IsSelected(&leading)) { |
568 | AliDebugClass(1, Form("Track %d didn't pass cuts", i)); | |
569 | continue; | |
2a1c7696 | 570 | } |
f34f960b | 571 | // check if it has largest momentum |
572 | if (leading.GetRef()->Pt() > ptMax) { | |
573 | ptMax = leading.GetRef()->Pt(); | |
574 | fLeading = i; | |
32992791 | 575 | } |
2a1c7696 | 576 | } |
61f275d1 | 577 | |
f34f960b | 578 | return fLeading; |
a378358c | 579 | } |