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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. | |
24 | // | |
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 | //_____________________________________________________________________________ | |
9477aa42 | 68 | AliRsnEvent& AliRsnEvent::operator= (const AliRsnEvent & event) |
0dffcc8a | 69 | { |
06351446 | 70 | // |
71 | // Works in the same way as the copy constructor. | |
72 | // | |
f34f960b | 73 | TObject::operator=(event); |
e6f3a909 | 74 | if (this == ©) |
75 | return *this; | |
2a1c7696 | 76 | fRef = event.fRef; |
77 | fRefMC = event.fRefMC; | |
78 | fLeading = event.fLeading; | |
c865cb1d | 79 | fPID = event.fPID; |
b63357a0 | 80 | fAODList = event.fAODList; |
5eb970a4 | 81 | |
2a1c7696 | 82 | return (*this); |
0dffcc8a | 83 | } |
7c2974c8 | 84 | |
5faf5a07 | 85 | //_____________________________________________________________________________ |
86 | AliRsnEvent::~AliRsnEvent() | |
87 | { | |
88 | // | |
f34f960b | 89 | // Destructor (does nothing since there are not owned pointers) |
5faf5a07 | 90 | // |
5faf5a07 | 91 | } |
92 | ||
06351446 | 93 | //_____________________________________________________________________________ |
f34f960b | 94 | void AliRsnEvent::SetDaughter(AliRsnDaughter &out, Int_t index, Bool_t fromMC) |
06351446 | 95 | { |
96 | // | |
f34f960b | 97 | // Assigns to the first argument the reference to the i-th track in the ref event. |
98 | // What assignment method to be used will depend on the index and on the type of input. | |
99 | // If the last argument is kTRUE and an MC is referenced, then both fRef and fRefMC will | |
100 | // point to the MC particle (pure MC analysis) | |
06351446 | 101 | // |
2a1c7696 | 102 | |
f34f960b | 103 | // by default the daughter is reset |
104 | // and assigned the used index | |
d7712d44 | 105 | out.Reset(); |
f34f960b | 106 | out.SetRsnID(index); |
d7712d44 | 107 | out.SetOwnerEvent(this); |
d7712d44 | 108 | |
f34f960b | 109 | // check input type |
110 | if (!InputOK()) return; | |
111 | Bool_t inputESD = IsESD(); | |
112 | ||
cceb9957 | 113 | |
f34f960b | 114 | Int_t trueIndex; |
115 | AliRsnDaughter::ERefType type; | |
116 | if (!ConvertAbsoluteIndex(index, trueIndex, type)) { | |
117 | AliError(Form("Failed to convert absolute index %d", index)); | |
118 | return; | |
119 | } | |
120 | switch (type) { | |
121 | case AliRsnDaughter::kTrack: | |
cceb9957 | 122 | if (inputESD) { |
123 | SetDaughterESDtrack(out, trueIndex); | |
124 | ||
125 | } else { | |
126 | SetDaughterAODtrack(out, trueIndex); | |
127 | } | |
f34f960b | 128 | break; |
129 | case AliRsnDaughter::kV0: | |
130 | if (inputESD) SetDaughterESDv0(out, trueIndex); else SetDaughterAODv0(out, trueIndex); | |
131 | break; | |
132 | case AliRsnDaughter::kCascade: | |
133 | if (inputESD) SetDaughterESDcascade(out, trueIndex); else SetDaughterAODcascade(out, trueIndex); | |
134 | break; | |
135 | default: | |
136 | AliError("Unrecognized daughter type"); | |
137 | return; | |
138 | } | |
cceb9957 | 139 | |
140 | // if it is pure MC, the index tells what particle | |
141 | // to be read in the stack of MC particles, otherwise | |
142 | // it is converted into a real collection index | |
143 | if (fromMC) out.SetRef(out.GetRefMC()); | |
7356f978 | 144 | } |
145 | ||
146 | //_____________________________________________________________________________ | |
f34f960b | 147 | AliRsnDaughter AliRsnEvent::GetDaughter(Int_t i, Bool_t fromMC) |
7356f978 | 148 | { |
149 | // | |
f34f960b | 150 | // Returns a daughter set using same criteria as SetDaughter |
7356f978 | 151 | // |
152 | ||
f34f960b | 153 | AliRsnDaughter d; |
154 | SetDaughter(d, i, fromMC); | |
155 | return d; | |
156 | } | |
7356f978 | 157 | |
f34f960b | 158 | //_____________________________________________________________________________ |
159 | void AliRsnEvent::SetDaughterESDtrack(AliRsnDaughter &out, Int_t i) | |
160 | { | |
161 | // | |
162 | // Setup the first argument to the track identified by the index. | |
163 | // When available, adds the MC information and references. | |
164 | // --- | |
165 | // Version #1: ESD tracks | |
166 | // | |
167 | ||
168 | AliESDEvent *esd = (AliESDEvent*)fRef; | |
169 | ||
170 | if (i >= 0 && i < esd->GetNumberOfTracks()) { | |
171 | AliESDtrack *track = esd->GetTrack(i); | |
172 | if (track) { | |
173 | out.SetRef(track); | |
174 | out.SetGood(); | |
175 | // if MC is present, assign label and retrieve corresponding particle | |
176 | if (fRefMC) { | |
177 | out.SetLabel(TMath::Abs(track->GetLabel())); | |
178 | if (!SetMCInfoESD(out)) { | |
179 | AliWarning("Failed assignment of MC info"); | |
180 | } | |
181 | } | |
182 | } else { | |
183 | AliWarning("Null track"); | |
184 | } | |
185 | } else { | |
186 | AliWarning(Form("Overflow: required index = %d, max = %d", i, esd->GetNumberOfTracks())); | |
7356f978 | 187 | } |
e0baff8c | 188 | } |
189 | ||
2e521c29 | 190 | //_____________________________________________________________________________ |
f34f960b | 191 | void AliRsnEvent::SetDaughterAODtrack(AliRsnDaughter &out, Int_t i) |
2e521c29 | 192 | { |
193 | // | |
f34f960b | 194 | // Setup the first argument to the track identified by the index. |
195 | // When available, adds the MC information and references. | |
196 | // --- | |
197 | // Version #2: AOD tracks | |
2e521c29 | 198 | // |
199 | ||
f34f960b | 200 | AliAODEvent *aod = (AliAODEvent*)fRef; |
2a1c7696 | 201 | |
f34f960b | 202 | if (i >= 0 && i < aod->GetNumberOfTracks()) { |
203 | AliAODTrack *track = aod->GetTrack(i); | |
204 | if (track) { | |
205 | out.SetRef(track); | |
206 | out.SetGood(); | |
207 | // if MC is present, assign label and retrieve corresponding particle | |
208 | if (fRefMC) { | |
209 | out.SetLabel(TMath::Abs(track->GetLabel())); | |
210 | if (!SetMCInfoAOD(out)) { | |
211 | AliWarning("Failed assignment of MC info"); | |
212 | } | |
213 | } | |
214 | } else { | |
215 | AliWarning("Null track"); | |
2a1c7696 | 216 | } |
f34f960b | 217 | } else { |
218 | AliWarning(Form("Overflow: required index = %d, max = %d", i, aod->GetNumberOfTracks())); | |
2a1c7696 | 219 | } |
f34f960b | 220 | } |
221 | ||
222 | //_____________________________________________________________________________ | |
223 | void AliRsnEvent::SetDaughterESDv0(AliRsnDaughter &out, Int_t i) | |
224 | { | |
225 | // | |
226 | // Setup the first argument to the track identified by the index. | |
227 | // When available, adds the MC information and references. | |
228 | // --- | |
229 | // Version #3: ESD v0 | |
230 | // | |
2a1c7696 | 231 | |
f34f960b | 232 | if (i >= 0 && i < fRef->GetNumberOfV0s()) { |
233 | AliESDEvent *ev = GetRefESD(); | |
234 | AliESDv0 *v0 = ev->GetV0(i); | |
235 | if (v0) { | |
236 | out.SetRef(v0); | |
237 | out.SetGood(); | |
238 | // if MC is present, retrieve the label of V0 from those of daughters | |
239 | if (fRefMC) { | |
240 | AliMCEvent *mc = (AliMCEvent*)fRefMC; | |
241 | AliESDtrack *tp = ev->GetTrack(v0->GetPindex()); | |
242 | AliESDtrack *tn = ev->GetTrack(v0->GetNindex()); | |
243 | if (mc && tp && tn) { | |
244 | Int_t lp = TMath::Abs(tp->GetLabel()); | |
245 | Int_t ln = TMath::Abs(tn->GetLabel()); | |
246 | TParticle *pp = mc->Stack()->Particle(lp); | |
247 | TParticle *pn = mc->Stack()->Particle(ln); | |
248 | if (pp && pn) { | |
249 | // if their first mothers are the same, the V0 is true | |
250 | // otherwise label remains '-1' --> fake V0 | |
251 | if (pp->GetFirstMother() == pn->GetFirstMother() && pp->GetFirstMother() >= 0) { | |
252 | out.SetLabel(pp->GetFirstMother()); | |
253 | SetMCInfoESD(out); | |
254 | } | |
255 | } | |
256 | } | |
257 | } | |
2a1c7696 | 258 | } |
f34f960b | 259 | } |
260 | } | |
261 | ||
262 | //_____________________________________________________________________________ | |
263 | void AliRsnEvent::SetDaughterAODv0(AliRsnDaughter &out, Int_t i) | |
264 | { | |
265 | // | |
266 | // Setup the first argument to the track identified by the index. | |
267 | // When available, adds the MC information and references. | |
268 | // --- | |
269 | // Version #4: AOD v0 | |
270 | // | |
2a1c7696 | 271 | |
f34f960b | 272 | if (i >= 0 && i < fRef->GetNumberOfV0s()) { |
273 | AliAODEvent *ev = (AliAODEvent*)fRef; | |
274 | AliAODv0 *v0 = ev->GetV0(i); | |
275 | if (v0) { | |
276 | out.SetRef(v0); | |
277 | out.SetGood(); | |
278 | if (fRefMC) { | |
279 | AliAODEvent *mc = (AliAODEvent*)fRefMC; | |
280 | TClonesArray *mcArray = (TClonesArray*)mc->GetList()->FindObject(AliAODMCParticle::StdBranchName()); | |
281 | AliAODTrack *tp = (AliAODTrack*)v0->GetDaughter(0); | |
282 | AliAODTrack *tn = (AliAODTrack*)v0->GetDaughter(1); | |
283 | if (mcArray && tp && tn) { | |
284 | Int_t lp = TMath::Abs(tp->GetLabel()); | |
285 | Int_t ln = TMath::Abs(tn->GetLabel()); | |
286 | AliAODMCParticle *pp = (AliAODMCParticle*)mcArray->At(lp); | |
287 | AliAODMCParticle *pn = (AliAODMCParticle*)mcArray->At(ln); | |
288 | if (pp && pn) { | |
289 | // if their first mothers are the same, the V0 is true | |
290 | // otherwise label remains '-1' --> fake V0 | |
291 | if (pp->GetMother() == pn->GetMother() && pp->GetMother() >= 0) { | |
292 | out.SetLabel(pp->GetMother()); | |
293 | SetMCInfoAOD(out); | |
294 | } | |
295 | } | |
2a1c7696 | 296 | } |
2a1c7696 | 297 | } |
a378358c | 298 | } |
2a1c7696 | 299 | } |
f34f960b | 300 | } |
2a1c7696 | 301 | |
f34f960b | 302 | //_____________________________________________________________________________ |
303 | void AliRsnEvent::SetDaughterESDcascade(AliRsnDaughter &out, Int_t i) | |
304 | { | |
305 | // | |
306 | // Setup the first argument to the track identified by the index. | |
307 | // When available, adds the MC information and references. | |
308 | // --- | |
309 | // Version #3: ESD cascade | |
310 | // | |
311 | ||
312 | if (i >= 0 && i < fRef->GetNumberOfCascades()) { | |
313 | AliESDEvent *ev = GetRefESD(); | |
314 | AliESDcascade *casc = ev->GetCascade(i); | |
315 | if (casc) { | |
316 | out.SetRef(casc); | |
317 | out.SetGood(); | |
318 | if (fRefMC) { | |
319 | ||
320 | } | |
321 | } | |
322 | } | |
2e521c29 | 323 | } |
324 | ||
15d5fd02 | 325 | //_____________________________________________________________________________ |
f34f960b | 326 | void AliRsnEvent::SetDaughterAODcascade(AliRsnDaughter &out, Int_t i) |
15d5fd02 | 327 | { |
328 | // | |
f34f960b | 329 | // Setup the first argument to the track identified by the index. |
330 | // When available, adds the MC information and references. | |
331 | // --- | |
332 | // Version #4: AOD cascade | |
15d5fd02 | 333 | // |
2a1c7696 | 334 | |
f34f960b | 335 | if (i >= 0 && i < fRef->GetNumberOfCascades()) { |
336 | AliAODEvent *ev = GetRefAOD(); | |
337 | AliAODv0 *casc = ev->GetCascade(i); | |
338 | if (casc) { | |
339 | out.SetRef(casc); | |
340 | out.SetGood(); | |
341 | if (fRefMC) { | |
342 | ||
343 | } | |
344 | } | |
345 | } | |
15d5fd02 | 346 | } |
347 | ||
7356f978 | 348 | //_____________________________________________________________________________ |
f34f960b | 349 | Bool_t AliRsnEvent::SetMCInfoESD(AliRsnDaughter &out) |
7356f978 | 350 | { |
351 | // | |
f34f960b | 352 | // Using the label assigned to the daughter, searches for the MC informations: |
353 | // -- MC reference | |
354 | // -- mother | |
7356f978 | 355 | // |
356 | ||
f34f960b | 357 | // if label makes no sense --> failed |
358 | Int_t label = out.GetLabel(); | |
359 | if (label < 0 || !fRefMC) return kFALSE; | |
360 | ||
361 | // get number of particles | |
362 | Int_t nMC = fRefMC->GetNumberOfTracks(); | |
363 | ||
364 | // if label too large --> failed | |
365 | if (label >= nMC) { | |
366 | AliWarning(Form("Stack overflow: track label = %d -- stack maximum = %d", label, nMC)); | |
367 | return kFALSE; | |
368 | } | |
369 | ||
370 | // retrieve particle | |
371 | AliMCEvent *mc = (AliMCEvent*)fRefMC; | |
372 | AliMCParticle *mcPart = (AliMCParticle*)mc->GetTrack(label); | |
373 | ||
374 | // if particle = NULL --> failed | |
375 | if (!mcPart) { | |
376 | AliWarning(Form("Stack discontinuity: label %d refers to a NULL object", label)); | |
377 | return kFALSE; | |
378 | } | |
379 | // otherwise --> success | |
380 | out.SetRefMC(mcPart); | |
381 | ||
382 | // if the particle is not primary, find the mother and get its PDG | |
383 | Int_t imum = mcPart->Particle()->GetFirstMother(); | |
384 | if (imum >= 0 && imum < nMC) { | |
385 | AliMCParticle *mcMother = (AliMCParticle*)mc->GetTrack(imum); | |
386 | if (mcMother) { | |
387 | out.SetMotherPDG(TMath::Abs(mcMother->Particle()->GetPdgCode())); | |
388 | } else { | |
389 | AliWarning(Form("Stack discontinuity: label mother %d refers to a NULL object", imum)); | |
390 | } | |
391 | } else { | |
392 | AliWarning(Form("Stack overflow: mother label = %d -- stack maximum = %d", imum, nMC)); | |
393 | } | |
394 | ||
395 | return kTRUE; | |
7356f978 | 396 | } |
397 | ||
2e521c29 | 398 | //_____________________________________________________________________________ |
f34f960b | 399 | Bool_t AliRsnEvent::SetMCInfoAOD(AliRsnDaughter &out) |
2e521c29 | 400 | { |
401 | // | |
f34f960b | 402 | // Using the label assigned to the daughter, searches for the MC informations: |
403 | // -- MC reference | |
404 | // -- mother | |
2e521c29 | 405 | // |
2a1c7696 | 406 | |
f34f960b | 407 | // if label makes no sense --> failed |
408 | Int_t label = out.GetLabel(); | |
409 | if (label < 0 || !fRefMC) return kFALSE; | |
410 | ||
411 | // retrieve particle | |
412 | AliAODEvent *mc = (AliAODEvent*)fRefMC; | |
413 | TClonesArray *mcArray = (TClonesArray*)mc->GetList()->FindObject(AliAODMCParticle::StdBranchName()); | |
414 | ||
415 | // get number of particles | |
416 | Int_t nMC = mcArray->GetEntriesFast(); | |
417 | ||
418 | // if label too large --> failed | |
419 | if (label >= nMC) { | |
420 | AliWarning(Form("Stack overflow: track label = %d -- stack maximum = %d", label, nMC)); | |
421 | return kFALSE; | |
422 | } | |
423 | ||
424 | // if particle = NULL --> failed | |
425 | AliAODMCParticle *mcPart = (AliAODMCParticle*)mcArray->At(label); | |
426 | if (!mcPart) { | |
427 | AliWarning(Form("Stack discontinuity: label %d refers to a NULL object", label)); | |
428 | return kFALSE; | |
429 | } | |
430 | // otherwise --> success | |
431 | out.SetRefMC(mcPart); | |
432 | ||
433 | // if the particle is not primary, find the mother and get its PDG | |
434 | Int_t imum = mcPart->GetMother(); | |
435 | if (imum >= 0 && imum < nMC) { | |
436 | AliAODMCParticle *mcMother = (AliAODMCParticle*)mcArray->At(imum); | |
437 | if (mcMother) { | |
438 | out.SetMotherPDG(TMath::Abs(mcMother->GetPdgCode())); | |
439 | } else { | |
440 | AliWarning(Form("Stack discontinuity: label mother %d refers to a NULL object", imum)); | |
441 | } | |
442 | } else if (imum >= nMC) { | |
443 | AliWarning(Form("Stack overflow: mother label = %d -- stack maximum = %d", imum, nMC)); | |
444 | } | |
445 | ||
446 | return kTRUE; | |
2e521c29 | 447 | } |
448 | ||
32992791 | 449 | //_____________________________________________________________________________ |
450 | Bool_t AliRsnEvent::ConvertAbsoluteIndex(Int_t index, Int_t &realIndex, AliRsnDaughter::ERefType &type) | |
451 | { | |
452 | // | |
453 | // Using the phylosophy of the absolute index, which loops over | |
454 | // all tracks, V0s and cascades, returns the result of a check | |
455 | // on it (first argument) based on this criterion: | |
456 | // 1) if the absolute ID is smaller than number of tracks, | |
457 | // return itself and the type 'track' | |
458 | // 2) if the absolute ID is larger than number of tracks, subtract it | |
459 | // and if the result is smaller than number of V0s, | |
460 | // return the corresponding V0 index and type | |
461 | // 3) if the absolute ID is larger than number of tracks + V0s, subtract them | |
462 | // and if the result is smaller than number of cascades, | |
463 | // return the corresponding cascade index and type | |
464 | // The results of this check are stored in the reference arguments, while the outcome of | |
465 | // the function is kTRUE if one of these checks was successful, otherwise it is kFALSE, | |
466 | // meaning that the absolute index reached the end. | |
467 | // | |
468 | ||
2a1c7696 | 469 | Int_t nTracks = fRef->GetNumberOfTracks(); |
470 | Int_t nV0s = fRef->GetNumberOfV0s(); | |
471 | Int_t nCascades = fRef->GetNumberOfCascades(); | |
472 | ||
473 | if (index < nTracks) { | |
474 | realIndex = index; | |
475 | type = AliRsnDaughter::kTrack; | |
476 | return kTRUE; | |
477 | } else if (index >= nTracks && index < nTracks + nV0s) { | |
478 | realIndex = index - nTracks; | |
479 | type = AliRsnDaughter::kV0; | |
480 | return kTRUE; | |
481 | } else if (index >= nTracks + nV0s && index < nTracks + nV0s + nCascades) { | |
482 | realIndex = index - nTracks - nV0s; | |
483 | type = AliRsnDaughter::kCascade; | |
484 | return kTRUE; | |
485 | } | |
486 | ||
487 | realIndex = -1; | |
488 | type = AliRsnDaughter::kNoType; | |
489 | return kFALSE; | |
32992791 | 490 | } |
491 | ||
7356f978 | 492 | //_____________________________________________________________________________ |
493 | Int_t AliRsnEvent::ConvertRealIndex(Int_t index, AliRsnDaughter::ERefType type) | |
494 | { | |
495 | // | |
496 | // Translates a pair made by index + object type into the corresponding | |
497 | // absolute index, which is set to -1 in case the real index overflows. | |
498 | // | |
499 | ||
500 | Int_t nTracks = fRef->GetNumberOfTracks(); | |
501 | Int_t nV0s = fRef->GetNumberOfV0s(); | |
502 | Int_t nCascades = fRef->GetNumberOfCascades(); | |
503 | ||
504 | switch (type) { | |
505 | case AliRsnDaughter::kTrack: | |
506 | if (index >= 0 && index < nTracks) | |
507 | return index; | |
508 | else | |
509 | return -1; | |
510 | case AliRsnDaughter::kV0: | |
511 | if (index >= 0 && index < nV0s) | |
512 | return nTracks + index; | |
513 | else | |
514 | return -1; | |
515 | case AliRsnDaughter::kCascade: | |
516 | if (index >= 0 && index < nCascades) | |
517 | return nTracks + nV0s + index; | |
518 | else | |
519 | return -1; | |
520 | default: | |
521 | return -1; | |
522 | } | |
523 | } | |
524 | ||
7c2974c8 | 525 | //_____________________________________________________________________________ |
f34f960b | 526 | Int_t AliRsnEvent::SelectLeadingParticle(AliRsnCutSet *cuts) |
78b94cbd | 527 | { |
528 | // | |
529 | // Searches the collection of all particles with given PID type and charge, | |
530 | // and returns the one with largest momentum, provided that it is greater than 1st argument. | |
531 | // If one specifies AliRsnPID::kUnknown as type or AliRsnDaughter::kNoPID as method, | |
532 | // the check is done over all particles irrespectively of their PID. | |
533 | // If the sign argument is '+' or '-', the check is done over the particles of that charge, | |
534 | // otherwise it is done irrespectively of the charge. | |
535 | // | |
536 | ||
f34f960b | 537 | // check input type |
538 | Bool_t inputESD = IsESD(); | |
539 | if (!inputESD && !IsAOD()) { | |
540 | AliError("Need to process ESD or AOD input"); | |
541 | return -1; | |
542 | } | |
543 | ||
544 | Double_t ptMax = 0.0; | |
2a1c7696 | 545 | Int_t i, nTracks = fRef->GetNumberOfTracks(); |
f34f960b | 546 | |
2a1c7696 | 547 | fLeading = -1; |
548 | AliRsnDaughter leading; | |
2a1c7696 | 549 | |
550 | for (i = 0; i < nTracks; i++) { | |
f34f960b | 551 | if (inputESD) |
552 | SetDaughterESDtrack(leading, i); | |
553 | else | |
554 | SetDaughterAODtrack(leading, i); | |
555 | if (!leading.IsOK()) { | |
556 | AliDebugClass(1, Form("Failed assignment of track %d", i)); | |
557 | continue; | |
2a1c7696 | 558 | } |
f34f960b | 559 | if (cuts && !cuts->IsSelected(&leading)) { |
560 | AliDebugClass(1, Form("Track %d didn't pass cuts", i)); | |
561 | continue; | |
2a1c7696 | 562 | } |
f34f960b | 563 | // check if it has largest momentum |
564 | if (leading.GetRef()->Pt() > ptMax) { | |
565 | ptMax = leading.GetRef()->Pt(); | |
566 | fLeading = i; | |
32992791 | 567 | } |
2a1c7696 | 568 | } |
f34f960b | 569 | |
570 | return fLeading; | |
a378358c | 571 | } |