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415d9f5c | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-2007, 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 | ||
18 | //------------------------------------------------------------------------- | |
19 | // Class for Kinematic Events | |
20 | // Author: Andreas Morsch, CERN | |
21 | //------------------------------------------------------------------------- | |
22 | #include <TArrow.h> | |
23 | #include <TMarker.h> | |
24 | #include <TH2F.h> | |
25 | #include <TTree.h> | |
26 | #include <TFile.h> | |
27 | #include <TParticle.h> | |
28 | #include <TClonesArray.h> | |
93836e1b | 29 | #include <TList.h> |
5df3496b | 30 | #include <TArrayF.h> |
415d9f5c | 31 | |
32 | #include "AliLog.h" | |
33 | #include "AliMCEvent.h" | |
5df3496b | 34 | #include "AliMCVertex.h" |
415d9f5c | 35 | #include "AliStack.h" |
36 | #include "AliTrackReference.h" | |
37 | #include "AliHeader.h" | |
83626b6b | 38 | #include "AliGenEventHeader.h" |
2e7ca177 | 39 | #include "AliGenHijingEventHeader.h" |
40 | #include "AliGenCocktailEventHeader.h" | |
415d9f5c | 41 | |
42 | ||
93836e1b | 43 | Int_t AliMCEvent::fgkBgLabelOffset(10000000); |
44 | ||
45 | ||
415d9f5c | 46 | AliMCEvent::AliMCEvent(): |
47 | AliVEvent(), | |
48 | fStack(0), | |
7aad0c47 | 49 | fMCParticles(0), |
415d9f5c | 50 | fMCParticleMap(0), |
fb9aeda5 | 51 | fHeader(new AliHeader()), |
93df0e9b | 52 | fTRBuffer(0), |
53 | fTrackReferences(new TClonesArray("AliTrackReference", 1000)), | |
415d9f5c | 54 | fTreeTR(0), |
55 | fTmpTreeTR(0), | |
56 | fTmpFileTR(0), | |
57 | fNprimaries(-1), | |
93836e1b | 58 | fNparticles(-1), |
59 | fSubsidiaryEvents(0), | |
60 | fPrimaryOffset(0), | |
7aad0c47 | 61 | fSecondaryOffset(0), |
5df3496b | 62 | fExternal(0), |
2e7ca177 | 63 | fVertex(0), |
64 | fNBG(-1) | |
415d9f5c | 65 | { |
66 | // Default constructor | |
67 | } | |
68 | ||
69 | AliMCEvent::AliMCEvent(const AliMCEvent& mcEvnt) : | |
70 | AliVEvent(mcEvnt), | |
93836e1b | 71 | fStack(mcEvnt.fStack), |
72 | fMCParticles(mcEvnt.fMCParticles), | |
73 | fMCParticleMap(mcEvnt.fMCParticleMap), | |
74 | fHeader(mcEvnt.fHeader), | |
75 | fTRBuffer(mcEvnt.fTRBuffer), | |
76 | fTrackReferences(mcEvnt.fTrackReferences), | |
77 | fTreeTR(mcEvnt.fTreeTR), | |
78 | fTmpTreeTR(mcEvnt.fTmpTreeTR), | |
79 | fTmpFileTR(mcEvnt.fTmpFileTR), | |
80 | fNprimaries(mcEvnt.fNprimaries), | |
81 | fNparticles(mcEvnt.fNparticles), | |
82 | fSubsidiaryEvents(0), | |
83 | fPrimaryOffset(0), | |
7aad0c47 | 84 | fSecondaryOffset(0), |
5df3496b | 85 | fExternal(0), |
2e7ca177 | 86 | fVertex(mcEvnt.fVertex), |
87 | fNBG(mcEvnt.fNBG) | |
415d9f5c | 88 | { |
89 | // Copy constructor | |
90 | } | |
91 | ||
92 | ||
93 | AliMCEvent& AliMCEvent::operator=(const AliMCEvent& mcEvnt) | |
94 | { | |
95 | // assignment operator | |
96 | if (this!=&mcEvnt) { | |
97 | AliVEvent::operator=(mcEvnt); | |
98 | } | |
99 | ||
100 | return *this; | |
101 | } | |
102 | ||
103 | void AliMCEvent::ConnectTreeE (TTree* tree) | |
104 | { | |
105 | // Connect the event header tree | |
106 | tree->SetBranchAddress("Header", &fHeader); | |
107 | } | |
108 | ||
109 | void AliMCEvent::ConnectTreeK (TTree* tree) | |
110 | { | |
205cbea7 | 111 | // Connect Kinematics tree |
415d9f5c | 112 | fStack = fHeader->Stack(); |
113 | fStack->ConnectTree(tree); | |
114 | // | |
115 | // Load the event | |
116 | fStack->GetEvent(); | |
205cbea7 | 117 | |
118 | UpdateEventInformation(); | |
119 | } | |
120 | ||
121 | void AliMCEvent::ConnectHeaderAndStack(AliHeader* header) | |
122 | { | |
123 | // fill MC event information from stack and header | |
124 | ||
125 | fHeader = header; | |
126 | fStack = fHeader->Stack(); | |
127 | ||
128 | UpdateEventInformation(); | |
129 | } | |
130 | ||
131 | void AliMCEvent::UpdateEventInformation() | |
132 | { | |
133 | // bookkeeping for next event | |
134 | ||
135 | // Connect the kinematics tree to the stack | |
136 | if (!fMCParticles) fMCParticles = new TClonesArray("AliMCParticle",1000); | |
137 | ||
138 | // Initialize members | |
415d9f5c | 139 | fNparticles = fStack->GetNtrack(); |
140 | fNprimaries = fStack->GetNprimary(); | |
477fb828 | 141 | |
ed97dc98 | 142 | Int_t iev = fHeader->GetEvent(); |
143 | Int_t ievr = fHeader->GetEventNrInRun(); | |
477fb828 | 144 | AliDebug(1, Form("AliMCEvent# %5d %5d: Number of particles: %5d (all) %5d (primaries)\n", |
ed97dc98 | 145 | iev, ievr, fNparticles, fNprimaries)); |
415d9f5c | 146 | |
147 | // This is a cache for the TParticles converted to MCParticles on user request | |
148 | if (fMCParticleMap) { | |
678a0069 | 149 | fMCParticleMap->Clear(); |
ee2774b7 | 150 | fMCParticles->Delete(); |
678a0069 | 151 | if (fNparticles>0) fMCParticleMap->Expand(fNparticles); |
152 | } | |
415d9f5c | 153 | else |
091fa189 | 154 | fMCParticleMap = new TObjArray(fNparticles); |
415d9f5c | 155 | } |
156 | ||
157 | void AliMCEvent::ConnectTreeTR (TTree* tree) | |
158 | { | |
159 | // Connect the track reference tree | |
160 | fTreeTR = tree; | |
161 | ||
162 | if (fTreeTR->GetBranch("AliRun")) { | |
163 | if (fTmpFileTR) { | |
164 | fTmpFileTR->Close(); | |
165 | delete fTmpFileTR; | |
166 | } | |
167 | // This is an old format with one branch per detector not in synch with TreeK | |
168 | ReorderAndExpandTreeTR(); | |
169 | } else { | |
170 | // New format | |
93df0e9b | 171 | fTreeTR->SetBranchAddress("TrackReferences", &fTRBuffer); |
415d9f5c | 172 | } |
173 | } | |
174 | ||
175 | Int_t AliMCEvent::GetParticleAndTR(Int_t i, TParticle*& particle, TClonesArray*& trefs) | |
176 | { | |
177 | // Retrieve entry i | |
178 | if (i < 0 || i >= fNparticles) { | |
179 | AliWarning(Form("AliMCEventHandler::GetEntry: Index out of range")); | |
180 | particle = 0; | |
181 | trefs = 0; | |
182 | return (-1); | |
183 | } | |
184 | particle = fStack->Particle(i); | |
185 | if (fTreeTR) { | |
186 | fTreeTR->GetEntry(fStack->TreeKEntry(i)); | |
93df0e9b | 187 | trefs = fTRBuffer; |
415d9f5c | 188 | return trefs->GetEntries(); |
189 | } else { | |
190 | trefs = 0; | |
191 | return -1; | |
192 | } | |
193 | } | |
194 | ||
195 | ||
196 | void AliMCEvent::Clean() | |
197 | { | |
198 | // Clean-up before new trees are connected | |
c6360f33 | 199 | delete fStack; fStack = 0; |
415d9f5c | 200 | |
201 | // Clear TR | |
93df0e9b | 202 | if (fTRBuffer) { |
ee2774b7 | 203 | fTRBuffer->Delete(); |
93df0e9b | 204 | delete fTRBuffer; |
205 | fTRBuffer = 0; | |
415d9f5c | 206 | } |
207 | } | |
208 | ||
04cb11d4 | 209 | #include <iostream> |
210 | ||
415d9f5c | 211 | void AliMCEvent::FinishEvent() |
212 | { | |
f1ac8a97 | 213 | // Clean-up after event |
c6360f33 | 214 | // |
67d77d71 | 215 | if (fStack) fStack->Reset(0); |
c6360f33 | 216 | fMCParticles->Delete(); |
04cb11d4 | 217 | |
218 | if (fMCParticleMap) | |
219 | fMCParticleMap->Clear(); | |
04cb11d4 | 220 | if (fTRBuffer) { |
568d5aed | 221 | fTRBuffer->Delete(); |
04cb11d4 | 222 | } |
223 | // fTrackReferences->Delete(); | |
04cb11d4 | 224 | fTrackReferences->Clear(); |
2bb794ba | 225 | fNparticles = -1; |
226 | fNprimaries = -1; | |
227 | fStack = 0; | |
93836e1b | 228 | // fSubsidiaryEvents->Clear(); |
229 | fSubsidiaryEvents = 0; | |
2e7ca177 | 230 | fNBG = -1; |
415d9f5c | 231 | } |
232 | ||
233 | ||
93df0e9b | 234 | |
415d9f5c | 235 | void AliMCEvent::DrawCheck(Int_t i, Int_t search) |
236 | { | |
237 | // | |
238 | // Simple event display for debugging | |
239 | if (!fTreeTR) { | |
240 | AliWarning("No Track Reference information available"); | |
241 | return; | |
242 | } | |
243 | ||
244 | if (i > -1 && i < fNparticles) { | |
245 | fTreeTR->GetEntry(fStack->TreeKEntry(i)); | |
246 | } else { | |
247 | AliWarning("AliMCEvent::GetEntry: Index out of range"); | |
248 | } | |
249 | ||
93df0e9b | 250 | Int_t nh = fTRBuffer->GetEntries(); |
415d9f5c | 251 | |
252 | ||
253 | if (search) { | |
254 | while(nh <= search && i < fNparticles - 1) { | |
255 | i++; | |
256 | fTreeTR->GetEntry(fStack->TreeKEntry(i)); | |
93df0e9b | 257 | nh = fTRBuffer->GetEntries(); |
415d9f5c | 258 | } |
259 | printf("Found Hits at %5d\n", i); | |
260 | } | |
261 | TParticle* particle = fStack->Particle(i); | |
262 | ||
263 | TH2F* h = new TH2F("", "", 100, -500, 500, 100, -500, 500); | |
264 | Float_t x0 = particle->Vx(); | |
265 | Float_t y0 = particle->Vy(); | |
266 | ||
267 | Float_t x1 = particle->Vx() + particle->Px() * 50.; | |
268 | Float_t y1 = particle->Vy() + particle->Py() * 50.; | |
269 | ||
270 | TArrow* a = new TArrow(x0, y0, x1, y1, 0.01); | |
271 | h->Draw(); | |
272 | a->SetLineColor(2); | |
273 | ||
274 | a->Draw(); | |
275 | ||
276 | for (Int_t ih = 0; ih < nh; ih++) { | |
93df0e9b | 277 | AliTrackReference* ref = (AliTrackReference*) fTRBuffer->At(ih); |
415d9f5c | 278 | TMarker* m = new TMarker(ref->X(), ref->Y(), 20); |
279 | m->Draw(); | |
280 | m->SetMarkerSize(0.4); | |
281 | ||
282 | } | |
283 | } | |
284 | ||
285 | ||
286 | void AliMCEvent::ReorderAndExpandTreeTR() | |
287 | { | |
288 | // | |
289 | // Reorder and expand the track reference tree in order to match the kinematics tree. | |
290 | // Copy the information from different branches into one | |
291 | // | |
292 | // TreeTR | |
293 | ||
294 | fTmpFileTR = new TFile("TrackRefsTmp.root", "recreate"); | |
295 | fTmpTreeTR = new TTree("TreeTR", "TrackReferences"); | |
93df0e9b | 296 | if (!fTRBuffer) fTRBuffer = new TClonesArray("AliTrackReference", 100); |
04cb11d4 | 297 | fTmpTreeTR->Branch("TrackReferences", "TClonesArray", &fTRBuffer, 64000, 0); |
415d9f5c | 298 | |
299 | ||
300 | // | |
301 | // Activate the used branches only. Otherwisw we get a bad memory leak. | |
bb278e48 | 302 | if (fTreeTR) { |
303 | fTreeTR->SetBranchStatus("*", 0); | |
304 | fTreeTR->SetBranchStatus("AliRun.*", 1); | |
305 | fTreeTR->SetBranchStatus("ITS.*", 1); | |
306 | fTreeTR->SetBranchStatus("TPC.*", 1); | |
307 | fTreeTR->SetBranchStatus("TRD.*", 1); | |
308 | fTreeTR->SetBranchStatus("TOF.*", 1); | |
309 | fTreeTR->SetBranchStatus("FRAME.*", 1); | |
310 | fTreeTR->SetBranchStatus("MUON.*", 1); | |
311 | } | |
312 | ||
415d9f5c | 313 | // |
314 | // Connect the active branches | |
315 | TClonesArray* trefs[7]; | |
316 | for (Int_t i = 0; i < 7; i++) trefs[i] = 0; | |
317 | if (fTreeTR){ | |
318 | // make branch for central track references | |
319 | if (fTreeTR->GetBranch("AliRun")) fTreeTR->SetBranchAddress("AliRun", &trefs[0]); | |
320 | if (fTreeTR->GetBranch("ITS")) fTreeTR->SetBranchAddress("ITS", &trefs[1]); | |
321 | if (fTreeTR->GetBranch("TPC")) fTreeTR->SetBranchAddress("TPC", &trefs[2]); | |
322 | if (fTreeTR->GetBranch("TRD")) fTreeTR->SetBranchAddress("TRD", &trefs[3]); | |
323 | if (fTreeTR->GetBranch("TOF")) fTreeTR->SetBranchAddress("TOF", &trefs[4]); | |
324 | if (fTreeTR->GetBranch("FRAME")) fTreeTR->SetBranchAddress("FRAME", &trefs[5]); | |
325 | if (fTreeTR->GetBranch("MUON")) fTreeTR->SetBranchAddress("MUON", &trefs[6]); | |
326 | } | |
327 | ||
328 | Int_t np = fStack->GetNprimary(); | |
329 | Int_t nt = fTreeTR->GetEntries(); | |
330 | ||
331 | // | |
332 | // Loop over tracks and find the secondaries with the help of the kine tree | |
333 | Int_t ifills = 0; | |
334 | Int_t it = 0; | |
335 | Int_t itlast = 0; | |
336 | TParticle* part; | |
337 | ||
338 | for (Int_t ip = np - 1; ip > -1; ip--) { | |
339 | part = fStack->Particle(ip); | |
340 | // printf("Particle %5d %5d %5d %5d %5d %5d \n", | |
341 | // ip, part->GetPdgCode(), part->GetFirstMother(), part->GetFirstDaughter(), | |
342 | // part->GetLastDaughter(), part->TestBit(kTransportBit)); | |
343 | ||
344 | // Determine range of secondaries produced by this primary during transport | |
345 | Int_t dau1 = part->GetFirstDaughter(); | |
346 | if (dau1 < np) continue; // This particle has no secondaries produced during transport | |
347 | Int_t dau2 = -1; | |
348 | if (dau1 > -1) { | |
349 | Int_t inext = ip - 1; | |
350 | while (dau2 < 0) { | |
351 | if (inext >= 0) { | |
352 | part = fStack->Particle(inext); | |
353 | dau2 = part->GetFirstDaughter(); | |
354 | if (dau2 == -1 || dau2 < np) { | |
355 | dau2 = -1; | |
356 | } else { | |
357 | dau2--; | |
358 | } | |
359 | } else { | |
360 | dau2 = fStack->GetNtrack() - 1; | |
361 | } | |
362 | inext--; | |
363 | } // find upper bound | |
364 | } // dau2 < 0 | |
365 | ||
366 | ||
367 | // printf("Check (1) %5d %5d %5d %5d %5d \n", ip, np, it, dau1, dau2); | |
368 | // | |
369 | // Loop over reference hits and find secondary label | |
370 | // First the tricky part: find the entry in treeTR than contains the hits or | |
371 | // make sure that no hits exist. | |
372 | // | |
373 | Bool_t hasHits = kFALSE; | |
374 | Bool_t isOutside = kFALSE; | |
375 | ||
376 | it = itlast; | |
377 | while (!hasHits && !isOutside && it < nt) { | |
378 | fTreeTR->GetEntry(it++); | |
379 | for (Int_t ib = 0; ib < 7; ib++) { | |
380 | if (!trefs[ib]) continue; | |
381 | Int_t nh = trefs[ib]->GetEntries(); | |
382 | for (Int_t ih = 0; ih < nh; ih++) { | |
383 | AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih); | |
384 | Int_t label = tr->Label(); | |
385 | if (label >= dau1 && label <= dau2) { | |
386 | hasHits = kTRUE; | |
387 | itlast = it - 1; | |
388 | break; | |
389 | } | |
390 | if (label > dau2 || label < ip) { | |
391 | isOutside = kTRUE; | |
392 | itlast = it - 1; | |
393 | break; | |
394 | } | |
395 | } // hits | |
396 | if (hasHits || isOutside) break; | |
397 | } // branches | |
398 | } // entries | |
399 | ||
400 | if (!hasHits) { | |
401 | // Write empty entries | |
402 | for (Int_t id = dau1; (id <= dau2); id++) { | |
403 | fTmpTreeTR->Fill(); | |
404 | ifills++; | |
405 | } | |
406 | } else { | |
407 | // Collect all hits | |
408 | fTreeTR->GetEntry(itlast); | |
409 | for (Int_t id = dau1; (id <= dau2) && (dau1 > -1); id++) { | |
410 | for (Int_t ib = 0; ib < 7; ib++) { | |
411 | if (!trefs[ib]) continue; | |
412 | Int_t nh = trefs[ib]->GetEntries(); | |
413 | for (Int_t ih = 0; ih < nh; ih++) { | |
414 | AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih); | |
415 | Int_t label = tr->Label(); | |
416 | // Skip primaries | |
417 | if (label == ip) continue; | |
418 | if (label > dau2 || label < dau1) | |
419 | printf("AliMCEventHandler::Track Reference Label out of range !: %5d %5d %5d %5d \n", | |
420 | itlast, label, dau1, dau2); | |
421 | if (label == id) { | |
422 | // secondary found | |
423 | tr->SetDetectorId(ib-1); | |
93df0e9b | 424 | Int_t nref = fTRBuffer->GetEntriesFast(); |
425 | TClonesArray &lref = *fTRBuffer; | |
415d9f5c | 426 | new(lref[nref]) AliTrackReference(*tr); |
427 | } | |
428 | } // hits | |
429 | } // branches | |
430 | fTmpTreeTR->Fill(); | |
ee2774b7 | 431 | fTRBuffer->Delete(); |
415d9f5c | 432 | ifills++; |
433 | } // daughters | |
434 | } // has hits | |
435 | } // tracks | |
436 | ||
437 | // | |
438 | // Now loop again and write the primaries | |
439 | // | |
440 | it = nt - 1; | |
441 | for (Int_t ip = 0; ip < np; ip++) { | |
442 | Int_t labmax = -1; | |
443 | while (labmax < ip && it > -1) { | |
444 | fTreeTR->GetEntry(it--); | |
445 | for (Int_t ib = 0; ib < 7; ib++) { | |
446 | if (!trefs[ib]) continue; | |
447 | Int_t nh = trefs[ib]->GetEntries(); | |
448 | // | |
449 | // Loop over reference hits and find primary labels | |
450 | for (Int_t ih = 0; ih < nh; ih++) { | |
451 | AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih); | |
452 | Int_t label = tr->Label(); | |
453 | if (label < np && label > labmax) { | |
454 | labmax = label; | |
455 | } | |
456 | ||
457 | if (label == ip) { | |
458 | tr->SetDetectorId(ib-1); | |
93df0e9b | 459 | Int_t nref = fTRBuffer->GetEntriesFast(); |
460 | TClonesArray &lref = *fTRBuffer; | |
415d9f5c | 461 | new(lref[nref]) AliTrackReference(*tr); |
462 | } | |
463 | } // hits | |
464 | } // branches | |
465 | } // entries | |
466 | it++; | |
467 | fTmpTreeTR->Fill(); | |
ee2774b7 | 468 | fTRBuffer->Delete(); |
415d9f5c | 469 | ifills++; |
470 | } // tracks | |
471 | // Check | |
472 | ||
473 | ||
474 | // Clean-up | |
475 | delete fTreeTR; fTreeTR = 0; | |
476 | ||
477 | for (Int_t ib = 0; ib < 7; ib++) { | |
478 | if (trefs[ib]) { | |
479 | trefs[ib]->Clear(); | |
480 | delete trefs[ib]; | |
481 | trefs[ib] = 0; | |
482 | } | |
483 | } | |
484 | ||
485 | if (ifills != fStack->GetNtrack()) | |
486 | printf("AliMCEvent:Number of entries in TreeTR (%5d) unequal to TreeK (%5d) \n", | |
487 | ifills, fStack->GetNtrack()); | |
488 | ||
489 | fTmpTreeTR->Write(); | |
490 | fTreeTR = fTmpTreeTR; | |
491 | } | |
492 | ||
7aad0c47 | 493 | AliVParticle* AliMCEvent::GetTrack(Int_t i) const |
415d9f5c | 494 | { |
495 | // Get MC Particle i | |
93836e1b | 496 | // |
7aad0c47 | 497 | |
498 | if (fExternal) { | |
499 | return ((AliVParticle*) (fMCParticles->At(i))); | |
500 | } | |
501 | ||
93836e1b | 502 | // |
503 | // Check first if this explicitely accesses the subsidiary event | |
7aad0c47 | 504 | |
93836e1b | 505 | if (i >= BgLabelOffset()) { |
506 | if (fSubsidiaryEvents) { | |
507 | AliMCEvent* bgEvent = (AliMCEvent*) (fSubsidiaryEvents->At(1)); | |
508 | return (bgEvent->GetTrack(i - BgLabelOffset())); | |
509 | } else { | |
510 | return 0; | |
511 | } | |
512 | } | |
513 | ||
514 | // | |
93df0e9b | 515 | AliMCParticle *mcParticle = 0; |
516 | TParticle *particle = 0; | |
517 | TClonesArray *trefs = 0; | |
518 | Int_t ntref = 0; | |
69fcabe8 | 519 | TObjArray *rarray = 0; |
93836e1b | 520 | |
521 | ||
522 | ||
415d9f5c | 523 | // Out of range check |
524 | if (i < 0 || i >= fNparticles) { | |
525 | AliWarning(Form("AliMCEvent::GetEntry: Index out of range")); | |
526 | mcParticle = 0; | |
527 | return (mcParticle); | |
528 | } | |
93836e1b | 529 | |
415d9f5c | 530 | |
93836e1b | 531 | if (fSubsidiaryEvents) { |
532 | AliMCEvent* mc; | |
533 | Int_t idx = FindIndexAndEvent(i, mc); | |
534 | return (mc->GetTrack(idx)); | |
535 | } | |
415d9f5c | 536 | |
415d9f5c | 537 | // |
93836e1b | 538 | // First check If the MC Particle has been already cached |
415d9f5c | 539 | if(!fMCParticleMap->At(i)) { |
93df0e9b | 540 | // Get particle from the stack |
541 | particle = fStack->Particle(i); | |
542 | // Get track references from Tree TR | |
543 | if (fTreeTR) { | |
544 | fTreeTR->GetEntry(fStack->TreeKEntry(i)); | |
545 | trefs = fTRBuffer; | |
546 | ntref = trefs->GetEntriesFast(); | |
69fcabe8 | 547 | rarray = new TObjArray(ntref); |
93df0e9b | 548 | Int_t nen = fTrackReferences->GetEntriesFast(); |
549 | for (Int_t j = 0; j < ntref; j++) { | |
550 | // Save the track references in a TClonesArray | |
551 | AliTrackReference* ref = dynamic_cast<AliTrackReference*>((*fTRBuffer)[j]); | |
552 | // Save the pointer in a TRefArray | |
58c338d2 | 553 | if (ref) { |
554 | new ((*fTrackReferences)[nen]) AliTrackReference(*ref); | |
555 | rarray->AddAt((*fTrackReferences)[nen], j); | |
556 | nen++; | |
557 | } | |
93df0e9b | 558 | } // loop over track references for entry i |
559 | } // if TreeTR available | |
415d9f5c | 560 | Int_t nentries = fMCParticles->GetEntriesFast(); |
091fa189 | 561 | mcParticle = new ((*fMCParticles)[nentries]) AliMCParticle(particle, rarray, i); |
415d9f5c | 562 | fMCParticleMap->AddAt(mcParticle, i); |
58c338d2 | 563 | if (mcParticle) { |
564 | TParticle* part = mcParticle->Particle(); | |
565 | Int_t imo = part->GetFirstMother(); | |
566 | Int_t id1 = part->GetFirstDaughter(); | |
567 | Int_t id2 = part->GetLastDaughter(); | |
568 | if (fPrimaryOffset > 0 || fSecondaryOffset > 0) { | |
569 | // Remapping of the mother and daughter indices | |
570 | if (imo < fNprimaries) { | |
571 | mcParticle->SetMother(imo + fPrimaryOffset); | |
572 | } else { | |
573 | mcParticle->SetMother(imo + fSecondaryOffset - fNprimaries); | |
574 | } | |
575 | ||
576 | if (id1 < fNprimaries) { | |
577 | mcParticle->SetFirstDaughter(id1 + fPrimaryOffset); | |
578 | mcParticle->SetLastDaughter (id2 + fPrimaryOffset); | |
579 | } else { | |
580 | mcParticle->SetFirstDaughter(id1 + fSecondaryOffset - fNprimaries); | |
581 | mcParticle->SetLastDaughter (id2 + fSecondaryOffset - fNprimaries); | |
582 | } | |
583 | ||
584 | ||
585 | if (i > fNprimaries) { | |
586 | mcParticle->SetLabel(i + fPrimaryOffset); | |
587 | } else { | |
588 | mcParticle->SetLabel(i + fSecondaryOffset - fNprimaries); | |
589 | } | |
93836e1b | 590 | } else { |
58c338d2 | 591 | mcParticle->SetFirstDaughter(id1); |
592 | mcParticle->SetLastDaughter (id2); | |
593 | mcParticle->SetMother (imo); | |
93836e1b | 594 | } |
93836e1b | 595 | } |
415d9f5c | 596 | } else { |
597 | mcParticle = dynamic_cast<AliMCParticle*>(fMCParticleMap->At(i)); | |
598 | } | |
415d9f5c | 599 | return mcParticle; |
600 | } | |
601 | ||
5df3496b | 602 | AliGenEventHeader* AliMCEvent::GenEventHeader() const {return (fHeader->GenEventHeader());} |
93836e1b | 603 | |
604 | ||
605 | void AliMCEvent::AddSubsidiaryEvent(AliMCEvent* event) | |
606 | { | |
607 | // Add a subsidiary event to the list; for example merged background event. | |
608 | if (!fSubsidiaryEvents) { | |
609 | TList* events = new TList(); | |
610 | events->Add(new AliMCEvent(*this)); | |
611 | fSubsidiaryEvents = events; | |
612 | } | |
613 | ||
614 | fSubsidiaryEvents->Add(event); | |
615 | } | |
616 | ||
95121282 | 617 | AliGenEventHeader *AliMCEvent::FindHeader(Int_t ipart) { |
618 | // | |
619 | // Get Header belonging to this track; | |
620 | // only works for primaries (i.e. particles coming from the Generator) | |
621 | // Also sorts out the case of Cocktail event (get header of subevent in cocktail generetor header) | |
622 | // | |
623 | ||
624 | AliMCEvent *event = this; | |
625 | ||
626 | if (fSubsidiaryEvents) { | |
627 | // Get pointer to subevent if needed | |
628 | ipart = FindIndexAndEvent(ipart,event); | |
629 | } | |
630 | ||
631 | AliGenEventHeader* header = event->GenEventHeader(); | |
632 | if (ipart >= header->NProduced()) { | |
633 | AliWarning(Form("Not a primary -- returning 0 (idx %d, nPrimary %d)",ipart,header->NProduced())); | |
634 | return 0; | |
635 | } | |
636 | AliGenCocktailEventHeader *coHeader = dynamic_cast<AliGenCocktailEventHeader*>(header); | |
637 | if (coHeader) { // Cocktail event | |
638 | TList* headerList = coHeader->GetHeaders(); | |
639 | TIter headIt(headerList); | |
640 | Int_t nproduced = 0; | |
641 | do { // Go trhough all headers and look for the correct one | |
642 | header = (AliGenEventHeader*) headIt(); | |
4636bbd8 | 643 | if (header) nproduced += header->NProduced(); |
95121282 | 644 | } while (header && ipart >= nproduced); |
645 | } | |
646 | ||
647 | return header; | |
648 | } | |
649 | ||
93836e1b | 650 | Int_t AliMCEvent::FindIndexAndEvent(Int_t oldidx, AliMCEvent*& event) const |
651 | { | |
652 | // Find the index and event in case of composed events like signal + background | |
653 | TIter next(fSubsidiaryEvents); | |
654 | next.Reset(); | |
655 | if (oldidx < fNprimaries) { | |
656 | while((event = (AliMCEvent*)next())) { | |
657 | if (oldidx < (event->GetPrimaryOffset() + event->GetNumberOfPrimaries())) break; | |
658 | } | |
58c338d2 | 659 | if (event) { |
660 | return (oldidx - event->GetPrimaryOffset()); | |
661 | } else { | |
662 | return (-1); | |
663 | } | |
93836e1b | 664 | } else { |
665 | while((event = (AliMCEvent*)next())) { | |
666 | if (oldidx < (event->GetSecondaryOffset() + (event->GetNumberOfTracks() - event->GetNumberOfPrimaries()))) break; | |
667 | } | |
58c338d2 | 668 | if (event) { |
669 | return (oldidx - event->GetSecondaryOffset() + event->GetNumberOfPrimaries()); | |
670 | } else { | |
671 | return (-1); | |
672 | } | |
93836e1b | 673 | } |
674 | } | |
675 | ||
676 | Int_t AliMCEvent::BgLabelToIndex(Int_t label) | |
677 | { | |
678 | // Convert a background label to an absolute index | |
679 | if (fSubsidiaryEvents) { | |
680 | AliMCEvent* bgEvent = (AliMCEvent*) (fSubsidiaryEvents->At(1)); | |
681 | label -= BgLabelOffset(); | |
682 | if (label < bgEvent->GetNumberOfPrimaries()) { | |
683 | label += bgEvent->GetPrimaryOffset(); | |
684 | } else { | |
685 | label += (bgEvent->GetSecondaryOffset() - fNprimaries); | |
686 | } | |
687 | } | |
688 | return (label); | |
689 | } | |
690 | ||
691 | ||
69fcabe8 | 692 | Bool_t AliMCEvent::IsPhysicalPrimary(Int_t i) const |
93836e1b | 693 | { |
694 | // | |
695 | // Delegate to subevent if necesarry | |
696 | ||
697 | ||
698 | if (!fSubsidiaryEvents) { | |
699 | return fStack->IsPhysicalPrimary(i); | |
700 | } else { | |
701 | AliMCEvent* evt = 0; | |
702 | Int_t idx = FindIndexAndEvent(i, evt); | |
703 | return (evt->IsPhysicalPrimary(idx)); | |
704 | } | |
705 | } | |
706 | ||
1081342d | 707 | Bool_t AliMCEvent::IsSecondaryFromWeakDecay(Int_t i) |
708 | { | |
709 | // | |
710 | // Delegate to subevent if necesarry | |
711 | if (!fSubsidiaryEvents) { | |
712 | return fStack->IsSecondaryFromWeakDecay(i); | |
713 | } else { | |
714 | AliMCEvent* evt = 0; | |
715 | Int_t idx = FindIndexAndEvent(i, evt); | |
716 | return (evt->IsSecondaryFromWeakDecay(idx)); | |
717 | } | |
718 | } | |
719 | ||
720 | Bool_t AliMCEvent::IsSecondaryFromMaterial(Int_t i) | |
721 | { | |
722 | // | |
723 | // Delegate to subevent if necesarry | |
724 | if (!fSubsidiaryEvents) { | |
725 | return fStack->IsSecondaryFromMaterial(i); | |
726 | } else { | |
727 | AliMCEvent* evt = 0; | |
728 | Int_t idx = FindIndexAndEvent(i, evt); | |
729 | return (evt->IsSecondaryFromMaterial(idx)); | |
730 | } | |
731 | } | |
732 | ||
733 | ||
93836e1b | 734 | void AliMCEvent::InitEvent() |
735 | { | |
35152e4b | 736 | // |
737 | // Initialize the subsidiary event structure | |
93836e1b | 738 | if (fSubsidiaryEvents) { |
739 | TIter next(fSubsidiaryEvents); | |
740 | AliMCEvent* evt; | |
741 | fNprimaries = 0; | |
742 | fNparticles = 0; | |
743 | ||
744 | while((evt = (AliMCEvent*)next())) { | |
745 | fNprimaries += evt->GetNumberOfPrimaries(); | |
746 | fNparticles += evt->GetNumberOfTracks(); | |
747 | } | |
748 | ||
749 | Int_t ioffp = 0; | |
750 | Int_t ioffs = fNprimaries; | |
751 | next.Reset(); | |
752 | ||
753 | while((evt = (AliMCEvent*)next())) { | |
754 | evt->SetPrimaryOffset(ioffp); | |
755 | evt->SetSecondaryOffset(ioffs); | |
756 | ioffp += evt->GetNumberOfPrimaries(); | |
757 | ioffs += (evt->GetNumberOfTracks() - evt->GetNumberOfPrimaries()); | |
758 | } | |
759 | } | |
760 | } | |
091fa189 | 761 | |
35152e4b | 762 | void AliMCEvent::PreReadAll() |
763 | { | |
764 | // Preread the MC information | |
765 | Int_t i; | |
766 | // secondaries | |
767 | for (i = fStack->GetNprimary(); i < fStack->GetNtrack(); i++) | |
768 | { | |
769 | GetTrack(i); | |
770 | } | |
771 | // primaries | |
772 | for (i = 0; i < fStack->GetNprimary(); i++) | |
773 | { | |
774 | GetTrack(i); | |
775 | } | |
35152e4b | 776 | } |
93836e1b | 777 | |
5df3496b | 778 | const AliVVertex * AliMCEvent::GetPrimaryVertex() const |
779 | { | |
780 | // Create a MCVertex object from the MCHeader information | |
570308e4 | 781 | TArrayF v; |
782 | GenEventHeader()->PrimaryVertex(v) ; | |
5df3496b | 783 | if (!fVertex) { |
5df3496b | 784 | fVertex = new AliMCVertex(v[0], v[1], v[2]); |
570308e4 | 785 | } else { |
786 | ((AliMCVertex*) fVertex)->SetPosition(v[0], v[1], v[2]); | |
5df3496b | 787 | } |
5df3496b | 788 | return fVertex; |
789 | } | |
790 | ||
2e7ca177 | 791 | Bool_t AliMCEvent::IsFromBGEvent(Int_t index) |
792 | { | |
793 | // Checks if a particle is from the background events | |
794 | // Works for HIJING inside Cocktail | |
795 | if (fNBG == -1) { | |
796 | AliGenCocktailEventHeader* coHeader = | |
797 | dynamic_cast<AliGenCocktailEventHeader*> (GenEventHeader()); | |
798 | if (!coHeader) return (0); | |
799 | TList* list = coHeader->GetHeaders(); | |
800 | AliGenHijingEventHeader* hijingH = dynamic_cast<AliGenHijingEventHeader*>(list->FindObject("Hijing")); | |
801 | if (!hijingH) return (0); | |
802 | fNBG = hijingH->NProduced(); | |
803 | } | |
804 | ||
805 | return (index < fNBG); | |
806 | } | |
807 | ||
5df3496b | 808 | |
415d9f5c | 809 | ClassImp(AliMCEvent) |