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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 | //--------------------------------------------------------------------------------- | |
18 | // Class AliMCEventHandler | |
19 | // This class gives access to MC truth during the analysis. | |
20 | // Monte Carlo truth is containe in the kinematics tree (produced particles) and | |
21 | // the tree of reference hits. | |
22 | // | |
23 | // Origin: Andreas Morsch, CERN, andreas.morsch@cern.ch | |
24 | //--------------------------------------------------------------------------------- | |
25 | ||
26 | ||
27 | ||
28 | #include "AliMCEventHandler.h" | |
29 | #include "AliMCEvent.h" | |
30 | #include "AliMCParticle.h" | |
31 | #include "AliPDG.h" | |
32 | #include "AliTrackReference.h" | |
33 | #include "AliHeader.h" | |
34 | #include "AliStack.h" | |
35 | #include "AliLog.h" | |
36 | ||
37 | #include <TTree.h> | |
38 | #include <TFile.h> | |
39 | #include <TList.h> | |
40 | #include <TParticle.h> | |
41 | #include <TString.h> | |
42 | #include <TClonesArray.h> | |
43 | #include <TDirectoryFile.h> | |
44 | ||
45 | ClassImp(AliMCEventHandler) | |
46 | ||
47 | AliMCEventHandler::AliMCEventHandler() : | |
48 | AliVEventHandler(), | |
49 | fMCEvent(new AliMCEvent()), | |
50 | fFileE(0), | |
51 | fFileK(0), | |
52 | fFileTR(0), | |
53 | fTreeE(0), | |
54 | fTreeK(0), | |
55 | fTreeTR(0), | |
56 | fDirK(0), | |
57 | fDirTR(0), | |
58 | fParticleSelected(0), | |
59 | fLabelMap(0), | |
60 | fNEvent(-1), | |
61 | fEvent(-1), | |
62 | fPathName(new TString("./")), | |
63 | fExtension(""), | |
64 | fFileNumber(0), | |
65 | fEventsPerFile(0), | |
66 | fReadTR(kTRUE), | |
67 | fInitOk(kFALSE), | |
68 | fSubsidiaryHandlers(0), | |
69 | fEventsInContainer(0), | |
70 | fPreReadMode(kNoPreRead) | |
71 | { | |
72 | // | |
73 | // Default constructor | |
74 | // | |
75 | // Be sure to add all particles to the PDG database | |
76 | AliPDG::AddParticlesToPdgDataBase(); | |
77 | } | |
78 | ||
79 | AliMCEventHandler::AliMCEventHandler(const char* name, const char* title) : | |
80 | AliVEventHandler(name, title), | |
81 | fMCEvent(new AliMCEvent()), | |
82 | fFileE(0), | |
83 | fFileK(0), | |
84 | fFileTR(0), | |
85 | fTreeE(0), | |
86 | fTreeK(0), | |
87 | fTreeTR(0), | |
88 | fDirK(0), | |
89 | fDirTR(0), | |
90 | fParticleSelected(0), | |
91 | fLabelMap(0), | |
92 | fNEvent(-1), | |
93 | fEvent(-1), | |
94 | fPathName(new TString("./")), | |
95 | fExtension(""), | |
96 | fFileNumber(0), | |
97 | fEventsPerFile(0), | |
98 | fReadTR(kTRUE), | |
99 | fInitOk(kFALSE), | |
100 | fSubsidiaryHandlers(0), | |
101 | fEventsInContainer(0), | |
102 | fPreReadMode(kNoPreRead) | |
103 | { | |
104 | // | |
105 | // Constructor | |
106 | // | |
107 | // Be sure to add all particles to the PDG database | |
108 | AliPDG::AddParticlesToPdgDataBase(); | |
109 | } | |
110 | AliMCEventHandler::~AliMCEventHandler() | |
111 | { | |
112 | // Destructor | |
113 | delete fPathName; | |
114 | delete fMCEvent; | |
115 | delete fFileE; | |
116 | delete fFileK; | |
117 | delete fFileTR; | |
118 | } | |
119 | ||
120 | Bool_t AliMCEventHandler::Init(Option_t* opt) | |
121 | { | |
122 | // Initialize input | |
123 | // | |
124 | if (!(strcmp(opt, "proof")) || !(strcmp(opt, "local"))) return kTRUE; | |
125 | // | |
126 | fFileE = TFile::Open(Form("%sgalice.root", fPathName->Data())); | |
127 | if (!fFileE) { | |
128 | AliError(Form("AliMCEventHandler:galice.root not found in directory %s ! \n", fPathName->Data())); | |
129 | fInitOk = kFALSE; | |
130 | return kFALSE; | |
131 | } | |
132 | ||
133 | // | |
134 | // Tree E | |
135 | fFileE->GetObject("TE", fTreeE); | |
136 | // Connect Tree E to the MCEvent | |
137 | fMCEvent->ConnectTreeE(fTreeE); | |
138 | fNEvent = fTreeE->GetEntries(); | |
139 | // | |
140 | // Tree K | |
141 | fFileK = TFile::Open(Form("%sKinematics%s.root", fPathName->Data(), fExtension)); | |
142 | if (!fFileK) { | |
143 | AliError(Form("AliMCEventHandler:Kinematics.root not found in directory %s ! \n", fPathName->Data())); | |
144 | fInitOk = kFALSE; | |
145 | return kTRUE; | |
146 | } | |
147 | ||
148 | fEventsPerFile = fFileK->GetNkeys() - fFileK->GetNProcessIDs(); | |
149 | // | |
150 | // Tree TR | |
151 | if (fReadTR) { | |
152 | fFileTR = TFile::Open(Form("%sTrackRefs%s.root", fPathName->Data(), fExtension)); | |
153 | if (!fFileTR) { | |
154 | AliError(Form("AliMCEventHandler:TrackRefs.root not found in directory %s ! \n", fPathName->Data())); | |
155 | fInitOk = kFALSE; | |
156 | return kTRUE; | |
157 | } | |
158 | } | |
159 | // | |
160 | // Reset the event number | |
161 | fEvent = -1; | |
162 | fFileNumber = 0; | |
163 | AliInfo(Form("Number of events in this directory %5d \n", fNEvent)); | |
164 | fInitOk = kTRUE; | |
165 | ||
166 | ||
167 | if (fSubsidiaryHandlers) { | |
168 | TIter next(fSubsidiaryHandlers); | |
169 | AliMCEventHandler *handler; | |
170 | while((handler = (AliMCEventHandler*)next())) { | |
171 | handler->Init(opt); | |
172 | handler->SetNumberOfEventsInContainer(fNEvent); | |
173 | } | |
174 | } | |
175 | ||
176 | return kTRUE; | |
177 | } | |
178 | ||
179 | Bool_t AliMCEventHandler::GetEvent(Int_t iev) | |
180 | { | |
181 | // Load the event number iev | |
182 | // | |
183 | // Calculate the file number | |
184 | if (!fInitOk) return kFALSE; | |
185 | ||
186 | Int_t inew = iev / fEventsPerFile; | |
187 | if (inew != fFileNumber) { | |
188 | fFileNumber = inew; | |
189 | if (!OpenFile(fFileNumber)){ | |
190 | return kFALSE; | |
191 | } | |
192 | } | |
193 | // Folder name | |
194 | char folder[20]; | |
195 | sprintf(folder, "Event%d", iev); | |
196 | // TreeE | |
197 | fTreeE->GetEntry(iev); | |
198 | // Tree K | |
199 | fFileK->GetObject(folder, fDirK); | |
200 | if (!fDirK) { | |
201 | AliWarning(Form("AliMCEventHandler: Event #%5d - Cannot get kinematics\n", iev)); | |
202 | return kFALSE; | |
203 | } | |
204 | ||
205 | fDirK ->GetObject("TreeK", fTreeK); | |
206 | if (!fTreeK) { | |
207 | AliError(Form("AliMCEventHandler: Event #%5d - Cannot get TreeK\n",iev)); | |
208 | return kFALSE; | |
209 | } | |
210 | // Connect TreeK to MCEvent | |
211 | fMCEvent->ConnectTreeK(fTreeK); | |
212 | //Tree TR | |
213 | if (fFileTR) { | |
214 | // Check which format has been read | |
215 | fFileTR->GetObject(folder, fDirTR); | |
216 | if (!fDirTR) { | |
217 | AliError(Form("AliMCEventHandler: Event #%5d - Cannot get track references\n",iev)); | |
218 | return kFALSE; | |
219 | } | |
220 | ||
221 | fDirTR->GetObject("TreeTR", fTreeTR); | |
222 | // | |
223 | if (!fTreeTR) { | |
224 | AliError(Form("AliMCEventHandler: Event #%5d - Cannot get TreeTR\n",iev)); | |
225 | return kFALSE; | |
226 | } | |
227 | // Connect TR to MCEvent | |
228 | fMCEvent->ConnectTreeTR(fTreeTR); | |
229 | } | |
230 | ||
231 | // | |
232 | return kTRUE; | |
233 | } | |
234 | ||
235 | Bool_t AliMCEventHandler::OpenFile(Int_t i) | |
236 | { | |
237 | // Open file i | |
238 | if (i > 0) { | |
239 | fExtension = Form("%d", i); | |
240 | } else { | |
241 | fExtension = ""; | |
242 | } | |
243 | ||
244 | ||
245 | delete fFileK; | |
246 | fFileK = TFile::Open(Form("%sKinematics%s.root", fPathName->Data(), fExtension)); | |
247 | if (!fFileK) { | |
248 | AliError(Form("AliMCEventHandler:Kinematics%s.root not found in directory %s ! \n", fExtension, fPathName->Data())); | |
249 | fInitOk = kFALSE; | |
250 | return kFALSE; | |
251 | } | |
252 | ||
253 | if (fReadTR) { | |
254 | delete fFileTR; | |
255 | fFileTR = TFile::Open(Form("%sTrackRefs%s.root", fPathName->Data(), fExtension)); | |
256 | if (!fFileTR) { | |
257 | AliWarning(Form("AliMCEventHandler:TrackRefs%s.root not found in directory %s ! \n", fExtension, fPathName->Data())); | |
258 | fInitOk = kFALSE; | |
259 | return kFALSE; | |
260 | } | |
261 | } | |
262 | ||
263 | fInitOk = kTRUE; | |
264 | ||
265 | return kTRUE; | |
266 | } | |
267 | ||
268 | Bool_t AliMCEventHandler::BeginEvent(Long64_t entry) | |
269 | { | |
270 | fParticleSelected.Delete(); | |
271 | fLabelMap.Delete(); | |
272 | // Read the next event | |
273 | ||
274 | if (fEventsInContainer != 0) { | |
275 | entry = (Long64_t) ( entry * Float_t(fNEvent) / Float_t (fEventsInContainer)); | |
276 | } | |
277 | ||
278 | ||
279 | if (entry == -1) { | |
280 | fEvent++; | |
281 | entry = fEvent; | |
282 | } else { | |
283 | fEvent = entry; | |
284 | } | |
285 | ||
286 | if (entry >= fNEvent) { | |
287 | AliWarning(Form("AliMCEventHandler: Event number out of range %5lld %5d\n", entry, fNEvent)); | |
288 | return kFALSE; | |
289 | } | |
290 | ||
291 | Bool_t result = GetEvent(entry); | |
292 | ||
293 | if (fSubsidiaryHandlers) { | |
294 | TIter next(fSubsidiaryHandlers); | |
295 | AliMCEventHandler *handler; | |
296 | while((handler = (AliMCEventHandler*)next())) { | |
297 | handler->BeginEvent(entry); | |
298 | } | |
299 | next.Reset(); | |
300 | while((handler = (AliMCEventHandler*)next())) { | |
301 | fMCEvent->AddSubsidiaryEvent(handler->MCEvent()); | |
302 | } | |
303 | fMCEvent->InitEvent(); | |
304 | } | |
305 | ||
306 | if (fPreReadMode == kLmPreRead) { | |
307 | fMCEvent->PreReadAll(); | |
308 | } | |
309 | ||
310 | return result; | |
311 | ||
312 | } | |
313 | ||
314 | void AliMCEventHandler::SelectParticle(Int_t i){ | |
315 | // taking the absolute values here, need to take care | |
316 | // of negative daughter and mother | |
317 | // IDs when setting! | |
318 | if (TMath::Abs(i) >= AliMCEvent::BgLabelOffset()) i = fMCEvent->BgLabelToIndex(TMath::Abs(i)); | |
319 | if(!IsParticleSelected(TMath::Abs(i)))fParticleSelected.Add(TMath::Abs(i),1); | |
320 | } | |
321 | ||
322 | Bool_t AliMCEventHandler::IsParticleSelected(Int_t i) { | |
323 | // taking the absolute values here, need to take | |
324 | // care with negative daughter and mother | |
325 | // IDs when setting! | |
326 | return (fParticleSelected.GetValue(TMath::Abs(i))==1); | |
327 | } | |
328 | ||
329 | ||
330 | void AliMCEventHandler::CreateLabelMap(){ | |
331 | ||
332 | // | |
333 | // this should be called once all selections where done | |
334 | // | |
335 | ||
336 | fLabelMap.Delete(); | |
337 | if(!fMCEvent){ | |
338 | fParticleSelected.Delete(); | |
339 | return; | |
340 | } | |
341 | ||
342 | VerifySelectedParticles(); | |
343 | ||
344 | Int_t iNew = 0; | |
345 | for(int i = 0;i < fMCEvent->GetNumberOfTracks();++i){ | |
346 | if(IsParticleSelected(i)){ | |
347 | fLabelMap.Add(i,iNew); | |
348 | iNew++; | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | Int_t AliMCEventHandler::GetNewLabel(Int_t i) { | |
354 | // Gets the label from the new created Map | |
355 | // Call CreatLabelMap before | |
356 | // otherwise only 0 returned | |
357 | return fLabelMap.GetValue(TMath::Abs(i)); | |
358 | } | |
359 | ||
360 | void AliMCEventHandler::VerifySelectedParticles(){ | |
361 | ||
362 | // | |
363 | // Make sure that each particle has at least it's predecessors | |
364 | // selected so that we have the complete ancestry tree | |
365 | // Private, should be only called by CreateLabelMap | |
366 | ||
367 | if(!fMCEvent){ | |
368 | fParticleSelected.Delete(); | |
369 | return; | |
370 | } | |
371 | ||
372 | Int_t nprim = fMCEvent->GetNumberOfPrimaries(); | |
373 | ||
374 | for(int i = 0;i < fMCEvent->GetNumberOfTracks(); ++i){ | |
375 | if(i < nprim){ | |
376 | SelectParticle(i);// take all primaries | |
377 | continue; | |
378 | } | |
379 | ||
380 | if(!IsParticleSelected(i))continue; | |
381 | ||
382 | AliMCParticle* mcpart = (AliMCParticle*) fMCEvent->GetTrack(i); | |
383 | Int_t imo = mcpart->GetMother(); | |
384 | while((imo >= nprim)&&!IsParticleSelected(imo)){ | |
385 | // Mother not yet selected | |
386 | SelectParticle(imo); | |
387 | mcpart = (AliMCParticle*) fMCEvent->GetTrack(imo); | |
388 | imo = mcpart->GetMother(); | |
389 | } | |
390 | // after last step we may have an unselected primary | |
391 | // mother | |
392 | if(imo>=0){ | |
393 | if(!IsParticleSelected(imo)) | |
394 | SelectParticle(imo); | |
395 | } | |
396 | }// loop over all tracks | |
397 | } | |
398 | ||
399 | Int_t AliMCEventHandler::GetParticleAndTR(Int_t i, TParticle*& particle, TClonesArray*& trefs) | |
400 | { | |
401 | // Retrieve entry i | |
402 | if (!fInitOk) { | |
403 | return 0; | |
404 | } else { | |
405 | return (fMCEvent->GetParticleAndTR(i, particle, trefs)); | |
406 | } | |
407 | } | |
408 | ||
409 | void AliMCEventHandler::DrawCheck(Int_t i, Int_t search) | |
410 | { | |
411 | // Retrieve entry i and draw momentum vector and hits | |
412 | fMCEvent->DrawCheck(i, search); | |
413 | } | |
414 | ||
415 | Bool_t AliMCEventHandler::Notify(const char *path) | |
416 | { | |
417 | // Notify about directory change | |
418 | // The directory is taken from the 'path' argument | |
419 | // Reconnect trees | |
420 | TString fileName(path); | |
421 | if(fileName.Contains("AliESDs.root")){ | |
422 | fileName.ReplaceAll("AliESDs.root", ""); | |
423 | } | |
424 | else if(fileName.Contains("AliAOD.root")){ | |
425 | fileName.ReplaceAll("AliAOD.root", ""); | |
426 | } | |
427 | else if(fileName.Contains("galice.root")){ | |
428 | // for running with galice and kinematics alone... | |
429 | fileName.ReplaceAll("galice.root", ""); | |
430 | } | |
431 | else if (fileName.BeginsWith("root:")) { | |
432 | fileName.Append("?ZIP="); | |
433 | } | |
434 | ||
435 | *fPathName = fileName; | |
436 | AliInfo(Form("Path: -%s-\n", fPathName->Data())); | |
437 | ||
438 | ResetIO(); | |
439 | InitIO(""); | |
440 | ||
441 | // Handle subsidiary handlers | |
442 | if (fSubsidiaryHandlers) { | |
443 | TIter next(fSubsidiaryHandlers); | |
444 | AliMCEventHandler *handler; | |
445 | while((handler = (AliMCEventHandler*) next())) { | |
446 | TString* spath = handler->GetInputPath(); | |
447 | if (spath->Contains("merged")) { | |
448 | if (! fPathName->IsNull()) { | |
449 | handler->Notify(Form("%s/../.", fPathName->Data())); | |
450 | } else { | |
451 | handler->Notify("../"); | |
452 | } | |
453 | } | |
454 | } | |
455 | } | |
456 | ||
457 | return kTRUE; | |
458 | } | |
459 | ||
460 | void AliMCEventHandler::ResetIO() | |
461 | { | |
462 | // Clear header and stack | |
463 | ||
464 | if (fInitOk) fMCEvent->Clean(); | |
465 | ||
466 | // Delete Tree E | |
467 | delete fTreeE; fTreeE = 0; | |
468 | ||
469 | // Reset files | |
470 | if (fFileE) {delete fFileE; fFileE = 0;} | |
471 | if (fFileK) {delete fFileK; fFileK = 0;} | |
472 | if (fFileTR) {delete fFileTR; fFileTR = 0;} | |
473 | fExtension=""; | |
474 | fInitOk = kFALSE; | |
475 | ||
476 | if (fSubsidiaryHandlers) { | |
477 | TIter next(fSubsidiaryHandlers); | |
478 | AliMCEventHandler *handler; | |
479 | while((handler = (AliMCEventHandler*)next())) { | |
480 | handler->ResetIO(); | |
481 | } | |
482 | } | |
483 | ||
484 | } | |
485 | ||
486 | ||
487 | Bool_t AliMCEventHandler::FinishEvent() | |
488 | { | |
489 | // Clean-up after each event | |
490 | delete fDirTR; fDirTR = 0; | |
491 | delete fDirK; fDirK = 0; | |
492 | if (fInitOk) fMCEvent->FinishEvent(); | |
493 | ||
494 | if (fSubsidiaryHandlers) { | |
495 | TIter next(fSubsidiaryHandlers); | |
496 | AliMCEventHandler *handler; | |
497 | while((handler = (AliMCEventHandler*)next())) { | |
498 | handler->FinishEvent(); | |
499 | } | |
500 | } | |
501 | ||
502 | return kTRUE; | |
503 | } | |
504 | ||
505 | Bool_t AliMCEventHandler::Terminate() | |
506 | { | |
507 | // Dummy | |
508 | return kTRUE; | |
509 | } | |
510 | ||
511 | Bool_t AliMCEventHandler::TerminateIO() | |
512 | { | |
513 | // Dummy | |
514 | return kTRUE; | |
515 | } | |
516 | ||
517 | ||
518 | void AliMCEventHandler::SetInputPath(const char* fname) | |
519 | { | |
520 | // Set the input path name | |
521 | delete fPathName; | |
522 | fPathName = new TString(fname); | |
523 | } | |
524 | ||
525 | void AliMCEventHandler::AddSubsidiaryHandler(AliMCEventHandler* handler) | |
526 | { | |
527 | // Add a subsidiary handler. For example for background events | |
528 | ||
529 | if (!fSubsidiaryHandlers) fSubsidiaryHandlers = new TList(); | |
530 | fSubsidiaryHandlers->Add(handler); | |
531 | } |