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9e1a0ddb | 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 | ||
acd84897 | 16 | /* $Id$ */ |
9e1a0ddb | 17 | |
18 | /////////////////////////////////////////////////////////////////////////////// | |
19 | // // | |
af7ba10c | 20 | // Particles stack class // |
21 | // Implements the TMCVirtualStack of the Virtual Monte Carlo // | |
22 | // Holds the particles transported during simulation // | |
23 | // Is used to compare results of reconstruction with simulation // | |
24 | // Author A.Morsch // | |
9e1a0ddb | 25 | // // |
26 | /////////////////////////////////////////////////////////////////////////////// | |
27 | ||
9e1a0ddb | 28 | |
7ca4655f | 29 | #include <TClonesArray.h> |
9e1a0ddb | 30 | #include <TObjArray.h> |
7ca4655f | 31 | #include <TPDGCode.h> |
9e1a0ddb | 32 | #include <TParticle.h> |
fe046ade | 33 | #include <TParticlePDG.h> |
9e1a0ddb | 34 | #include <TTree.h> |
942a9039 | 35 | #include <TDirectory.h> |
9e1a0ddb | 36 | |
21bf7095 | 37 | #include "AliLog.h" |
88cb7938 | 38 | #include "AliStack.h" |
9e1a0ddb | 39 | |
40 | ClassImp(AliStack) | |
41 | ||
e2afb3b6 | 42 | //_______________________________________________________________________ |
43 | AliStack::AliStack(): | |
44 | fParticles(0), | |
45 | fParticleMap(0), | |
46 | fParticleFileMap(0), | |
47 | fParticleBuffer(0), | |
90e48c0c | 48 | fCurrentTrack(0), |
e2afb3b6 | 49 | fTreeK(0), |
50 | fNtrack(0), | |
51 | fNprimary(0), | |
52 | fCurrent(-1), | |
53 | fCurrentPrimary(-1), | |
54 | fHgwmk(0), | |
88cb7938 | 55 | fLoadPoint(0), |
942a9039 | 56 | fTrackLabelMap(0) |
9e1a0ddb | 57 | { |
58 | // | |
e2afb3b6 | 59 | // Default constructor |
9e1a0ddb | 60 | // |
9e1a0ddb | 61 | } |
62 | ||
e2afb3b6 | 63 | //_______________________________________________________________________ |
942a9039 | 64 | AliStack::AliStack(Int_t size, const char* /*evfoldname*/): |
e2afb3b6 | 65 | fParticles(new TClonesArray("TParticle",1000)), |
66 | fParticleMap(new TObjArray(size)), | |
67 | fParticleFileMap(0), | |
68 | fParticleBuffer(0), | |
90e48c0c | 69 | fCurrentTrack(0), |
e2afb3b6 | 70 | fTreeK(0), |
71 | fNtrack(0), | |
72 | fNprimary(0), | |
73 | fCurrent(-1), | |
74 | fCurrentPrimary(-1), | |
75 | fHgwmk(0), | |
88cb7938 | 76 | fLoadPoint(0), |
942a9039 | 77 | fTrackLabelMap(0) |
e2afb3b6 | 78 | { |
79 | // | |
80 | // Constructor | |
81 | // | |
82 | } | |
9e1a0ddb | 83 | |
e2afb3b6 | 84 | //_______________________________________________________________________ |
85 | AliStack::AliStack(const AliStack& st): | |
9938d01c | 86 | TVirtualMCStack(st), |
87 | fParticles(new TClonesArray("TParticle",1000)), | |
88 | fParticleMap(new TObjArray(*st.Particles())), | |
89 | fParticleFileMap(st.fParticleFileMap), | |
90 | fParticleBuffer(0), | |
91 | fCurrentTrack(0), | |
92 | fTreeK((TTree*)(st.fTreeK->Clone())), | |
93 | fNtrack(st.GetNtrack()), | |
94 | fNprimary(st.GetNprimary()), | |
95 | fCurrent(-1), | |
96 | fCurrentPrimary(-1), | |
97 | fHgwmk(0), | |
98 | fLoadPoint(0), | |
942a9039 | 99 | fTrackLabelMap(0) |
9e1a0ddb | 100 | { |
9938d01c | 101 | // Copy constructor |
9e1a0ddb | 102 | } |
103 | ||
9938d01c | 104 | |
e2afb3b6 | 105 | //_______________________________________________________________________ |
6c4904c2 | 106 | void AliStack::Copy(TObject&) const |
e2afb3b6 | 107 | { |
21bf7095 | 108 | AliFatal("Not implemented!"); |
e2afb3b6 | 109 | } |
9e1a0ddb | 110 | |
e2afb3b6 | 111 | //_______________________________________________________________________ |
9e1a0ddb | 112 | AliStack::~AliStack() |
113 | { | |
114 | // | |
115 | // Destructor | |
116 | // | |
117 | ||
118 | if (fParticles) { | |
119 | fParticles->Delete(); | |
120 | delete fParticles; | |
121 | } | |
122 | delete fParticleMap; | |
9e1a0ddb | 123 | } |
124 | ||
125 | // | |
126 | // public methods | |
127 | // | |
128 | ||
129 | //_____________________________________________________________________________ | |
642f15cf | 130 | void AliStack::PushTrack(Int_t done, Int_t parent, Int_t pdg, Float_t *pmom, |
88cb7938 | 131 | Float_t *vpos, Float_t *polar, Float_t tof, |
132 | TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) | |
9e1a0ddb | 133 | { |
134 | // | |
135 | // Load a track on the stack | |
136 | // | |
b4bb4536 | 137 | // done 1 if the track has to be transported |
138 | // 0 if not | |
9e1a0ddb | 139 | // parent identifier of the parent track. -1 for a primary |
140 | // pdg particle code | |
141 | // pmom momentum GeV/c | |
142 | // vpos position | |
143 | // polar polarisation | |
144 | // tof time of flight in seconds | |
145 | // mecha production mechanism | |
146 | // ntr on output the number of the track stored | |
147 | // | |
148 | ||
9e1a0ddb | 149 | // const Float_t tlife=0; |
150 | ||
151 | // | |
152 | // Here we get the static mass | |
153 | // For MC is ok, but a more sophisticated method could be necessary | |
154 | // if the calculated mass is required | |
155 | // also, this method is potentially dangerous if the mass | |
156 | // used in the MC is not the same of the PDG database | |
157 | // | |
fe046ade | 158 | TParticlePDG* pmc = TDatabasePDG::Instance()->GetParticle(pdg); |
159 | if (pmc) { | |
160 | Float_t mass = TDatabasePDG::Instance()->GetParticle(pdg)->Mass(); | |
161 | Float_t e=TMath::Sqrt(mass*mass+pmom[0]*pmom[0]+ | |
162 | pmom[1]*pmom[1]+pmom[2]*pmom[2]); | |
163 | ||
ccf7a81f | 164 | // printf("Loading mass %f ene %f No %d ip %d parent %d done %d pos %f %f %f mom %f %f %f kS %d m \n", |
165 | // mass,e,fNtrack,pdg,parent,done,vpos[0],vpos[1],vpos[2],pmom[0],pmom[1],pmom[2],kS); | |
166 | ||
9e1a0ddb | 167 | |
642f15cf | 168 | PushTrack(done, parent, pdg, pmom[0], pmom[1], pmom[2], e, |
fe046ade | 169 | vpos[0], vpos[1], vpos[2], tof, polar[0], polar[1], polar[2], |
170 | mech, ntr, weight, is); | |
171 | } else { | |
21bf7095 | 172 | AliWarning(Form("Particle type %d not defined in PDG Database !", pdg)); |
173 | AliWarning("Particle skipped !"); | |
fe046ade | 174 | } |
9e1a0ddb | 175 | } |
176 | ||
177 | //_____________________________________________________________________________ | |
642f15cf | 178 | void AliStack::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
9e1a0ddb | 179 | Double_t px, Double_t py, Double_t pz, Double_t e, |
180 | Double_t vx, Double_t vy, Double_t vz, Double_t tof, | |
181 | Double_t polx, Double_t poly, Double_t polz, | |
98490ea9 | 182 | TMCProcess mech, Int_t &ntr, Double_t weight, Int_t is) |
9e1a0ddb | 183 | { |
184 | // | |
185 | // Load a track on the stack | |
186 | // | |
b4bb4536 | 187 | // done 1 if the track has to be transported |
188 | // 0 if not | |
9e1a0ddb | 189 | // parent identifier of the parent track. -1 for a primary |
190 | // pdg particle code | |
191 | // kS generation status code | |
192 | // px, py, pz momentum GeV/c | |
193 | // vx, vy, vz position | |
194 | // polar polarisation | |
195 | // tof time of flight in seconds | |
196 | // mech production mechanism | |
197 | // ntr on output the number of the track stored | |
198 | // | |
199 | // New method interface: | |
200 | // arguments were changed to be in correspondence with TParticle | |
201 | // constructor. | |
202 | // Note: the energy is not calculated from the static mass but | |
203 | // it is passed by argument e. | |
204 | ||
9e1a0ddb | 205 | const Int_t kFirstDaughter=-1; |
206 | const Int_t kLastDaughter=-1; | |
6308b375 | 207 | |
208 | ||
9e1a0ddb | 209 | TClonesArray &particles = *fParticles; |
210 | TParticle* particle | |
211 | = new(particles[fLoadPoint++]) | |
47c8bcbe | 212 | TParticle(pdg, is, parent, -1, kFirstDaughter, kLastDaughter, |
9e1a0ddb | 213 | px, py, pz, e, vx, vy, vz, tof); |
214 | ||
215 | particle->SetPolarisation(polx, poly, polz); | |
216 | particle->SetWeight(weight); | |
217 | particle->SetUniqueID(mech); | |
218 | ||
f4414561 | 219 | |
220 | ||
221 | if(!done) { | |
222 | particle->SetBit(kDoneBit); | |
223 | } else { | |
224 | particle->SetBit(kTransportBit); | |
225 | } | |
226 | ||
227 | ||
9e1a0ddb | 228 | |
229 | // Declare that the daughter information is valid | |
230 | particle->SetBit(kDaughtersBit); | |
231 | // Add the particle to the stack | |
6308b375 | 232 | |
233 | ||
9e1a0ddb | 234 | fParticleMap->AddAtAndExpand(particle, fNtrack);//CHECK!! |
235 | ||
236 | if(parent>=0) { | |
942a9039 | 237 | particle = dynamic_cast<TParticle*>(fParticleMap->At(parent)); |
238 | if (particle) { | |
239 | particle->SetLastDaughter(fNtrack); | |
240 | if(particle->GetFirstDaughter()<0) particle->SetFirstDaughter(fNtrack); | |
241 | } | |
242 | else { | |
243 | AliError(Form("Parent %d does not exist",parent)); | |
244 | } | |
245 | } else { | |
246 | // | |
247 | // This is a primary track. Set high water mark for this event | |
248 | fHgwmk = fNtrack; | |
249 | // | |
250 | // Set also number if primary tracks | |
251 | fNprimary = fHgwmk+1; | |
252 | fCurrentPrimary++; | |
9e1a0ddb | 253 | } |
254 | ntr = fNtrack++; | |
255 | } | |
256 | ||
257 | //_____________________________________________________________________________ | |
642f15cf | 258 | TParticle* AliStack::PopNextTrack(Int_t& itrack) |
b9d0a01d | 259 | { |
260 | // | |
261 | // Returns next track from stack of particles | |
262 | // | |
263 | ||
264 | ||
265 | TParticle* track = GetNextParticle(); | |
266 | ||
267 | if (track) { | |
268 | itrack = fCurrent; | |
269 | track->SetBit(kDoneBit); | |
270 | } | |
fe046ade | 271 | else |
b9d0a01d | 272 | itrack = -1; |
fe046ade | 273 | |
274 | fCurrentTrack = track; | |
b9d0a01d | 275 | return track; |
276 | } | |
277 | ||
b9d0a01d | 278 | //_____________________________________________________________________________ |
642f15cf | 279 | TParticle* AliStack::PopPrimaryForTracking(Int_t i) |
b9d0a01d | 280 | { |
281 | // | |
282 | // Returns i-th primary particle if it is flagged to be tracked, | |
283 | // 0 otherwise | |
284 | // | |
285 | ||
286 | TParticle* particle = Particle(i); | |
287 | ||
288 | if (!particle->TestBit(kDoneBit)) | |
289 | return particle; | |
290 | else | |
291 | return 0; | |
292 | } | |
293 | ||
9e1a0ddb | 294 | //_____________________________________________________________________________ |
77db8cbf | 295 | Bool_t AliStack::PurifyKine() |
9e1a0ddb | 296 | { |
297 | // | |
298 | // Compress kinematic tree keeping only flagged particles | |
299 | // and renaming the particle id's in all the hits | |
300 | // | |
301 | ||
302 | TObjArray &particles = *fParticleMap; | |
77db8cbf | 303 | int nkeep = fHgwmk + 1, parent, i; |
9e1a0ddb | 304 | TParticle *part, *father; |
942a9039 | 305 | fTrackLabelMap.Set(particles.GetLast()+1); |
9e1a0ddb | 306 | |
307 | // Save in Header total number of tracks before compression | |
9e1a0ddb | 308 | // If no tracks generated return now |
77db8cbf | 309 | if(fHgwmk+1 == fNtrack) return kFALSE; |
9e1a0ddb | 310 | |
9e1a0ddb | 311 | // First pass, invalid Daughter information |
942a9039 | 312 | for(i=0; i<fNtrack; i++) { |
313 | // Preset map, to be removed later | |
314 | if(i<=fHgwmk) fTrackLabelMap[i]=i ; | |
315 | else { | |
316 | fTrackLabelMap[i] = -99; | |
317 | if((part=dynamic_cast<TParticle*>(particles.At(i)))) { | |
e44c5340 | 318 | // |
319 | // Check of this track should be kept for physics reasons | |
942a9039 | 320 | if (KeepPhysics(part)) KeepTrack(i); |
e44c5340 | 321 | // |
942a9039 | 322 | part->ResetBit(kDaughtersBit); |
323 | part->SetFirstDaughter(-1); | |
324 | part->SetLastDaughter(-1); | |
325 | } | |
76969085 | 326 | } |
9e1a0ddb | 327 | } |
328 | // Invalid daughter information for the parent of the first particle | |
329 | // generated. This may or may not be the current primary according to | |
330 | // whether decays have been recorded among the primaries | |
e2afb3b6 | 331 | part = dynamic_cast<TParticle*>(particles.At(fHgwmk+1)); |
9e1a0ddb | 332 | particles.At(part->GetFirstMother())->ResetBit(kDaughtersBit); |
333 | // Second pass, build map between old and new numbering | |
334 | for(i=fHgwmk+1; i<fNtrack; i++) { | |
942a9039 | 335 | if(particles.At(i)->TestBit(kKeepBit)) { |
942a9039 | 336 | // This particle has to be kept |
337 | fTrackLabelMap[i]=nkeep; | |
338 | // If old and new are different, have to move the pointer | |
339 | if(i!=nkeep) particles[nkeep]=particles.At(i); | |
340 | part = dynamic_cast<TParticle*>(particles.At(nkeep)); | |
942a9039 | 341 | // as the parent is always *before*, it must be already |
342 | // in place. This is what we are checking anyway! | |
343 | if((parent=part->GetFirstMother())>fHgwmk) | |
344 | if(fTrackLabelMap[parent]==-99) Fatal("PurifyKine","fTrackLabelMap[%d] = -99!\n",parent); | |
345 | else part->SetFirstMother(fTrackLabelMap[parent]); | |
942a9039 | 346 | nkeep++; |
347 | } | |
9e1a0ddb | 348 | } |
349 | ||
350 | // Fix daughters information | |
351 | for (i=fHgwmk+1; i<nkeep; i++) { | |
942a9039 | 352 | part = dynamic_cast<TParticle*>(particles.At(i)); |
353 | parent = part->GetFirstMother(); | |
354 | if(parent>=0) { | |
355 | father = dynamic_cast<TParticle*>(particles.At(parent)); | |
356 | if(father->TestBit(kDaughtersBit)) { | |
357 | ||
358 | if(i<father->GetFirstDaughter()) father->SetFirstDaughter(i); | |
359 | if(i>father->GetLastDaughter()) father->SetLastDaughter(i); | |
360 | } else { | |
361 | // Initialise daughters info for first pass | |
362 | father->SetFirstDaughter(i); | |
363 | father->SetLastDaughter(i); | |
364 | father->SetBit(kDaughtersBit); | |
365 | } | |
9e1a0ddb | 366 | } |
9e1a0ddb | 367 | } |
942a9039 | 368 | // |
369 | // Now the output bit, from fHgwmk to nkeep we write everything and we erase | |
370 | if(nkeep > fParticleFileMap.GetSize()) fParticleFileMap.Set(Int_t (nkeep*1.5)); | |
371 | for (i=fHgwmk+1; i<nkeep; ++i) { | |
372 | fParticleBuffer = dynamic_cast<TParticle*>(particles.At(i)); | |
373 | fParticleFileMap[i]=static_cast<Int_t>(TreeK()->GetEntries()); | |
374 | TreeK()->Fill(); | |
375 | particles[i]=fParticleBuffer=0; | |
376 | } | |
9e1a0ddb | 377 | |
77db8cbf | 378 | for (i = nkeep; i < fNtrack; ++i) particles[i]=0; |
6308b375 | 379 | |
942a9039 | 380 | Int_t toshrink = fNtrack-fHgwmk-1; |
381 | fLoadPoint-=toshrink; | |
2b22f272 | 382 | |
942a9039 | 383 | for(i=fLoadPoint; i<fLoadPoint+toshrink; ++i) fParticles->RemoveAt(i); |
384 | fNtrack=nkeep; | |
385 | fHgwmk=nkeep-1; | |
77db8cbf | 386 | return kTRUE; |
6308b375 | 387 | } |
388 | ||
1166db55 | 389 | |
77db8cbf | 390 | Bool_t AliStack::ReorderKine() |
6308b375 | 391 | { |
392 | // | |
393 | // In some transport code children might not come in a continuous sequence. | |
394 | // In this case the stack has to be reordered in order to establish the | |
395 | // mother daughter relation using index ranges. | |
396 | // | |
77db8cbf | 397 | if(fHgwmk+1 == fNtrack) return kFALSE; |
6308b375 | 398 | |
399 | // | |
400 | // Howmany secondaries have been produced ? | |
401 | Int_t nNew = fNtrack - fHgwmk - 1; | |
a1d92a3f | 402 | |
6308b375 | 403 | if (nNew > 0) { |
404 | Int_t i, j; | |
405 | TObjArray &particles = *fParticleMap; | |
406 | TArrayI map1(nNew); | |
407 | // | |
408 | // Copy pointers to temporary array | |
409 | TParticle** tmp = new TParticle*[nNew]; | |
410 | ||
411 | for (i = 0; i < nNew; i++) { | |
412 | if (particles.At(fHgwmk + 1 + i)) { | |
6308b375 | 413 | tmp[i] = (TParticle*) (particles.At(fHgwmk + 1 + i)); |
6308b375 | 414 | } else { |
415 | tmp[i] = 0x0; | |
416 | } | |
417 | map1[i] = -99; | |
418 | } | |
419 | ||
420 | ||
421 | // | |
422 | // Reset LoadPoint | |
423 | // | |
1166db55 | 424 | Int_t loadPoint = fHgwmk + 1; |
6308b375 | 425 | // |
426 | // Re-Push particles into stack | |
427 | // The outer loop is over parents, the inner over children. | |
428 | // -1 refers to the primary particle | |
429 | // | |
a1d92a3f | 430 | for (i = -1; i < nNew-1; i++) { |
6308b375 | 431 | Int_t ipa; |
432 | TParticle* parP; | |
433 | if (i == -1) { | |
434 | ipa = tmp[0]->GetFirstMother(); | |
435 | parP =dynamic_cast<TParticle*>(particles.At(ipa)); | |
436 | } else { | |
437 | ipa = (fHgwmk + 1 + i); | |
438 | // Skip deleted particles | |
439 | if (!tmp[i]) continue; | |
440 | // Skip particles without children | |
441 | if (tmp[i]->GetFirstDaughter() == -1) continue; | |
442 | parP = tmp[i]; | |
443 | } | |
444 | // Reset daughter information | |
a1d92a3f | 445 | |
446 | Int_t idaumin = parP->GetFirstDaughter() - fHgwmk - 1; | |
447 | Int_t idaumax = parP->GetLastDaughter() - fHgwmk - 1; | |
6308b375 | 448 | parP->SetFirstDaughter(-1); |
449 | parP->SetLastDaughter(-1); | |
a1d92a3f | 450 | for (j = idaumin; j <= idaumax; j++) { |
6308b375 | 451 | // Skip deleted particles |
452 | if (!tmp[j]) continue; | |
453 | // Skip particles already handled | |
454 | if (map1[j] != -99) continue; | |
455 | Int_t jpa = tmp[j]->GetFirstMother(); | |
456 | // Check if daughter of current parent | |
457 | if (jpa == ipa) { | |
1166db55 | 458 | particles[loadPoint] = tmp[j]; |
6308b375 | 459 | // Re-establish daughter information |
1166db55 | 460 | parP->SetLastDaughter(loadPoint); |
461 | if (parP->GetFirstDaughter() == -1) parP->SetFirstDaughter(loadPoint); | |
6308b375 | 462 | // Set Mother information |
463 | if (i != -1) { | |
464 | tmp[j]->SetFirstMother(map1[i]); | |
465 | } | |
466 | // Build the map | |
1166db55 | 467 | map1[j] = loadPoint; |
6308b375 | 468 | // Increase load point |
1166db55 | 469 | loadPoint++; |
6308b375 | 470 | } |
471 | } // children | |
472 | } // parents | |
473 | ||
474 | delete[] tmp; | |
475 | ||
476 | // | |
477 | // Build map for remapping of hits | |
478 | // | |
942a9039 | 479 | fTrackLabelMap.Set(fNtrack); |
6308b375 | 480 | for (i = 0; i < fNtrack; i ++) { |
481 | if (i <= fHgwmk) { | |
942a9039 | 482 | fTrackLabelMap[i] = i; |
6308b375 | 483 | } else{ |
942a9039 | 484 | fTrackLabelMap[i] = map1[i - fHgwmk -1]; |
6308b375 | 485 | } |
486 | } | |
6308b375 | 487 | } // new particles poduced |
77db8cbf | 488 | |
489 | return kTRUE; | |
9e1a0ddb | 490 | } |
491 | ||
e44c5340 | 492 | Bool_t AliStack::KeepPhysics(TParticle* part) |
493 | { | |
494 | // | |
495 | // Some particles have to kept on the stack for reasons motivated | |
496 | // by physics analysis. Decision is put here. | |
497 | // | |
498 | Bool_t keep = kFALSE; | |
499 | // | |
500 | // Keep first-generation daughter from primaries with heavy flavor | |
501 | // | |
502 | Int_t parent = part->GetFirstMother(); | |
503 | if (parent >= 0 && parent <= fHgwmk) { | |
e2afb3b6 | 504 | TParticle* father = dynamic_cast<TParticle*>(Particles()->At(parent)); |
e44c5340 | 505 | Int_t kf = father->GetPdgCode(); |
506 | kf = TMath::Abs(kf); | |
507 | Int_t kfl = kf; | |
508 | // meson ? | |
509 | if (kfl > 10) kfl/=100; | |
510 | // baryon | |
511 | if (kfl > 10) kfl/=10; | |
512 | if (kfl > 10) kfl/=10; | |
513 | if (kfl >= 4) { | |
514 | keep = kTRUE; | |
515 | } | |
516 | } | |
517 | return keep; | |
518 | } | |
519 | ||
9e1a0ddb | 520 | //_____________________________________________________________________________ |
521 | void AliStack::FinishEvent() | |
522 | { | |
88cb7938 | 523 | // |
524 | // Write out the kinematics that was not yet filled | |
525 | // | |
9e1a0ddb | 526 | |
88cb7938 | 527 | // Update event header |
9e1a0ddb | 528 | |
88cb7938 | 529 | if (!TreeK()) { |
9e1a0ddb | 530 | // Fatal("FinishEvent", "No kinematics tree is defined."); |
531 | // Don't panic this is a probably a lego run | |
532 | return; | |
9e1a0ddb | 533 | } |
534 | ||
535 | CleanParents(); | |
942a9039 | 536 | if(TreeK()->GetEntries() ==0) { |
9e1a0ddb | 537 | // set the fParticleFileMap size for the first time |
538 | fParticleFileMap.Set(fHgwmk+1); | |
539 | } | |
540 | ||
541 | Bool_t allFilled = kFALSE; | |
542 | TObject *part; | |
543 | for(Int_t i=0; i<fHgwmk+1; ++i) | |
544 | if((part=fParticleMap->At(i))) { | |
e2afb3b6 | 545 | fParticleBuffer = dynamic_cast<TParticle*>(part); |
88cb7938 | 546 | fParticleFileMap[i]= static_cast<Int_t>(TreeK()->GetEntries()); |
547 | TreeK()->Fill(); | |
da2af24c | 548 | fParticleBuffer=0; |
549 | fParticleMap->AddAt(0,i); | |
9e1a0ddb | 550 | |
551 | // When all primaries were filled no particle!=0 | |
552 | // should be left => to be removed later. | |
21bf7095 | 553 | if (allFilled) AliWarning(Form("Why != 0 part # %d?\n",i)); |
9e1a0ddb | 554 | } |
88cb7938 | 555 | else |
556 | { | |
9e1a0ddb | 557 | // // printf("Why = 0 part # %d?\n",i); => We know. |
558 | // break; | |
88cb7938 | 559 | // we don't break now in order to be sure there is no |
560 | // particle !=0 left. | |
561 | // To be removed later and replaced with break. | |
562 | if(!allFilled) allFilled = kTRUE; | |
563 | } | |
9e1a0ddb | 564 | } |
9e1a0ddb | 565 | //_____________________________________________________________________________ |
88cb7938 | 566 | |
9e1a0ddb | 567 | void AliStack::FlagTrack(Int_t track) |
568 | { | |
569 | // | |
570 | // Flags a track and all its family tree to be kept | |
571 | // | |
572 | ||
573 | TParticle *particle; | |
574 | ||
575 | Int_t curr=track; | |
576 | while(1) { | |
e2afb3b6 | 577 | particle=dynamic_cast<TParticle*>(fParticleMap->At(curr)); |
9e1a0ddb | 578 | |
579 | // If the particle is flagged the three from here upward is saved already | |
580 | if(particle->TestBit(kKeepBit)) return; | |
581 | ||
582 | // Save this particle | |
583 | particle->SetBit(kKeepBit); | |
584 | ||
585 | // Move to father if any | |
586 | if((curr=particle->GetFirstMother())==-1) return; | |
587 | } | |
588 | } | |
589 | ||
590 | //_____________________________________________________________________________ | |
ed54bf31 | 591 | void AliStack::KeepTrack(Int_t track) |
9e1a0ddb | 592 | { |
593 | // | |
594 | // Flags a track to be kept | |
595 | // | |
596 | ||
597 | fParticleMap->At(track)->SetBit(kKeepBit); | |
598 | } | |
599 | ||
600 | //_____________________________________________________________________________ | |
ae96e41f | 601 | void AliStack::Clean(Int_t size) |
9e1a0ddb | 602 | { |
603 | // | |
ae96e41f | 604 | // Reset stack data except for fTreeK |
9e1a0ddb | 605 | // |
88cb7938 | 606 | |
9e1a0ddb | 607 | fNtrack=0; |
608 | fNprimary=0; | |
609 | fHgwmk=0; | |
610 | fLoadPoint=0; | |
611 | fCurrent = -1; | |
612 | ResetArrays(size); | |
613 | } | |
614 | ||
ae96e41f | 615 | //_____________________________________________________________________________ |
616 | void AliStack::Reset(Int_t size) | |
617 | { | |
618 | // | |
619 | // Reset stack data including fTreeK | |
620 | // | |
621 | ||
622 | Clean(size); | |
c38db470 | 623 | delete fParticleBuffer; fParticleBuffer = 0; |
ae96e41f | 624 | fTreeK = 0x0; |
625 | } | |
626 | ||
9e1a0ddb | 627 | //_____________________________________________________________________________ |
628 | void AliStack::ResetArrays(Int_t size) | |
629 | { | |
630 | // | |
631 | // Resets stack arrays | |
632 | // | |
633 | ||
be3380a3 | 634 | if (fParticles) |
635 | fParticles->Clear(); | |
636 | else | |
637 | fParticles = new TClonesArray("TParticle",1000); | |
638 | if (fParticleMap) { | |
639 | fParticleMap->Clear(); | |
640 | if (size>0) fParticleMap->Expand(size);} | |
641 | else | |
642 | fParticleMap = new TObjArray(size); | |
9e1a0ddb | 643 | } |
644 | ||
645 | //_____________________________________________________________________________ | |
e2afb3b6 | 646 | void AliStack::SetHighWaterMark(Int_t) |
9e1a0ddb | 647 | { |
648 | // | |
649 | // Set high water mark for last track in event | |
650 | // | |
6308b375 | 651 | |
942a9039 | 652 | fHgwmk = fNtrack-1; |
653 | fCurrentPrimary=fHgwmk; | |
654 | // Set also number of primary tracks | |
655 | fNprimary = fHgwmk+1; | |
9e1a0ddb | 656 | } |
657 | ||
658 | //_____________________________________________________________________________ | |
659 | TParticle* AliStack::Particle(Int_t i) | |
660 | { | |
661 | // | |
662 | // Return particle with specified ID | |
942a9039 | 663 | |
da2af24c | 664 | if(!fParticleMap->At(i)) { |
911a3148 | 665 | Int_t nentries = fParticles->GetEntriesFast(); |
9e1a0ddb | 666 | // algorithmic way of getting entry index |
667 | // (primary particles are filled after secondaries) | |
e94530da | 668 | Int_t entry = TreeKEntry(i); |
9e1a0ddb | 669 | // check whether algorithmic way and |
670 | // and the fParticleFileMap[i] give the same; | |
671 | // give the fatal error if not | |
672 | if (entry != fParticleFileMap[i]) { | |
21bf7095 | 673 | AliFatal(Form( |
9e1a0ddb | 674 | "!! The algorithmic way and map are different: !!\n entry: %d map: %d", |
21bf7095 | 675 | entry, fParticleFileMap[i])); |
9e1a0ddb | 676 | } |
942a9039 | 677 | // Load particle at entry into fParticleBuffer |
88cb7938 | 678 | TreeK()->GetEntry(entry); |
942a9039 | 679 | // Add to the TClonesarray |
9e1a0ddb | 680 | new ((*fParticles)[nentries]) TParticle(*fParticleBuffer); |
942a9039 | 681 | // Store a pointer in the TObjArray |
9e1a0ddb | 682 | fParticleMap->AddAt((*fParticles)[nentries],i); |
683 | } | |
e2afb3b6 | 684 | return dynamic_cast<TParticle*>(fParticleMap->At(i)); |
9e1a0ddb | 685 | } |
686 | ||
e94530da | 687 | //_____________________________________________________________________________ |
688 | TParticle* AliStack::ParticleFromTreeK(Int_t id) const | |
689 | { | |
690 | // | |
691 | // return pointer to TParticle with label id | |
692 | // | |
693 | Int_t entry; | |
694 | if ((entry = TreeKEntry(id)) < 0) return 0; | |
695 | if (fTreeK->GetEntry(entry)<=0) return 0; | |
696 | return fParticleBuffer; | |
697 | } | |
698 | ||
699 | //_____________________________________________________________________________ | |
700 | Int_t AliStack::TreeKEntry(Int_t id) const | |
701 | { | |
702 | // | |
942a9039 | 703 | // Return entry number in the TreeK for particle with label id |
704 | // Return negative number if label>fNtrack | |
705 | // | |
706 | // The order of particles in TreeK reflects the order of the transport of primaries and production of secondaries: | |
e94530da | 707 | // |
942a9039 | 708 | // Before transport there are fNprimary particles on the stack. |
709 | // They are transported one by one and secondaries (fNtrack - fNprimary) are produced. | |
710 | // After the transport of each particles secondaries are written to the TreeK | |
711 | // They occupy the entries 0 ... fNtrack - fNprimary - 1 | |
712 | // The primaries are written after they have been transported and occupy | |
713 | // fNtrack - fNprimary .. fNtrack - 1 | |
714 | ||
e94530da | 715 | Int_t entry; |
716 | if (id<fNprimary) | |
717 | entry = id+fNtrack-fNprimary; | |
718 | else | |
719 | entry = id-fNprimary; | |
720 | return entry; | |
721 | } | |
722 | ||
5d8718b8 | 723 | //_____________________________________________________________________________ |
642f15cf | 724 | Int_t AliStack::GetCurrentParentTrackNumber() const |
5d8718b8 | 725 | { |
726 | // | |
727 | // Return number of the parent of the current track | |
728 | // | |
729 | ||
730 | TParticle* current = (TParticle*)fParticleMap->At(fCurrent); | |
731 | ||
732 | if (current) | |
733 | return current->GetFirstMother(); | |
734 | else { | |
21bf7095 | 735 | AliWarning("Current track not found in the stack"); |
5d8718b8 | 736 | return -1; |
737 | } | |
738 | } | |
739 | ||
9e1a0ddb | 740 | //_____________________________________________________________________________ |
f5f55563 | 741 | Int_t AliStack::GetPrimary(Int_t id) |
9e1a0ddb | 742 | { |
743 | // | |
744 | // Return number of primary that has generated track | |
745 | // | |
746 | ||
747 | int current, parent; | |
9e1a0ddb | 748 | // |
749 | parent=id; | |
750 | while (1) { | |
751 | current=parent; | |
f5f55563 | 752 | parent=Particle(current)->GetFirstMother(); |
9e1a0ddb | 753 | if(parent<0) return current; |
754 | } | |
755 | } | |
756 | ||
757 | //_____________________________________________________________________________ | |
758 | void AliStack::DumpPart (Int_t i) const | |
759 | { | |
760 | // | |
761 | // Dumps particle i in the stack | |
762 | // | |
e2afb3b6 | 763 | dynamic_cast<TParticle*>(fParticleMap->At(i))->Print(); |
9e1a0ddb | 764 | } |
765 | ||
766 | //_____________________________________________________________________________ | |
767 | void AliStack::DumpPStack () | |
768 | { | |
769 | // | |
770 | // Dumps the particle stack | |
771 | // | |
772 | ||
3ab6f951 | 773 | Int_t i; |
774 | ||
88cb7938 | 775 | printf("\n\n=======================================================================\n"); |
3ab6f951 | 776 | for (i=0;i<fNtrack;i++) |
9e1a0ddb | 777 | { |
778 | TParticle* particle = Particle(i); | |
779 | if (particle) { | |
780 | printf("-> %d ",i); particle->Print(); | |
781 | printf("--------------------------------------------------------------\n"); | |
782 | } | |
783 | else | |
784 | Warning("DumpPStack", "No particle with id %d.", i); | |
785 | } | |
786 | ||
88cb7938 | 787 | printf("\n=======================================================================\n\n"); |
9e1a0ddb | 788 | |
789 | // print particle file map | |
790 | printf("\nParticle file map: \n"); | |
3ab6f951 | 791 | for (i=0; i<fNtrack; i++) |
9e1a0ddb | 792 | printf(" %d th entry: %d \n",i,fParticleFileMap[i]); |
793 | } | |
794 | ||
795 | ||
796 | //_____________________________________________________________________________ | |
797 | void AliStack::DumpLoadedStack() const | |
798 | { | |
799 | // | |
800 | // Dumps the particle in the stack | |
801 | // that are loaded in memory. | |
802 | // | |
803 | ||
804 | TObjArray &particles = *fParticleMap; | |
805 | printf( | |
806 | "\n\n=======================================================================\n"); | |
807 | for (Int_t i=0;i<fNtrack;i++) | |
808 | { | |
e2afb3b6 | 809 | TParticle* particle = dynamic_cast<TParticle*>(particles[i]); |
9e1a0ddb | 810 | if (particle) { |
811 | printf("-> %d ",i); particle->Print(); | |
812 | printf("--------------------------------------------------------------\n"); | |
813 | } | |
814 | else { | |
815 | printf("-> %d Particle not loaded.\n",i); | |
816 | printf("--------------------------------------------------------------\n"); | |
817 | } | |
818 | } | |
819 | printf( | |
820 | "\n=======================================================================\n\n"); | |
821 | } | |
822 | ||
823 | // | |
824 | // protected methods | |
825 | // | |
826 | ||
827 | //_____________________________________________________________________________ | |
828 | void AliStack::CleanParents() | |
829 | { | |
830 | // | |
831 | // Clean particles stack | |
832 | // Set parent/daughter relations | |
833 | // | |
834 | ||
835 | TObjArray &particles = *fParticleMap; | |
836 | TParticle *part; | |
837 | int i; | |
838 | for(i=0; i<fHgwmk+1; i++) { | |
e2afb3b6 | 839 | part = dynamic_cast<TParticle*>(particles.At(i)); |
9e1a0ddb | 840 | if(part) if(!part->TestBit(kDaughtersBit)) { |
841 | part->SetFirstDaughter(-1); | |
842 | part->SetLastDaughter(-1); | |
843 | } | |
844 | } | |
845 | } | |
846 | ||
847 | //_____________________________________________________________________________ | |
848 | TParticle* AliStack::GetNextParticle() | |
849 | { | |
850 | // | |
851 | // Return next particle from stack of particles | |
852 | // | |
853 | ||
854 | TParticle* particle = 0; | |
855 | ||
856 | // search secondaries | |
857 | //for(Int_t i=fNtrack-1; i>=0; i--) { | |
858 | for(Int_t i=fNtrack-1; i>fHgwmk; i--) { | |
e2afb3b6 | 859 | particle = dynamic_cast<TParticle*>(fParticleMap->At(i)); |
9e1a0ddb | 860 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
861 | fCurrent=i; | |
9e1a0ddb | 862 | return particle; |
863 | } | |
864 | } | |
865 | ||
866 | // take next primary if all secondaries were done | |
867 | while (fCurrentPrimary>=0) { | |
868 | fCurrent = fCurrentPrimary; | |
e2afb3b6 | 869 | particle = dynamic_cast<TParticle*>(fParticleMap->At(fCurrentPrimary--)); |
9e1a0ddb | 870 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
9e1a0ddb | 871 | return particle; |
872 | } | |
873 | } | |
874 | ||
875 | // nothing to be tracked | |
876 | fCurrent = -1; | |
6308b375 | 877 | |
878 | ||
9e1a0ddb | 879 | return particle; |
880 | } | |
88cb7938 | 881 | //__________________________________________________________________________________________ |
9e1a0ddb | 882 | |
88cb7938 | 883 | TTree* AliStack::TreeK() |
884 | { | |
885 | //returns TreeK | |
942a9039 | 886 | return fTreeK; |
88cb7938 | 887 | } |
9e1a0ddb | 888 | //__________________________________________________________________________________________ |
88cb7938 | 889 | |
942a9039 | 890 | void AliStack::ConnectTree(TTree* tree) |
9e1a0ddb | 891 | { |
892 | // | |
88cb7938 | 893 | // Creates branch for writing particles |
894 | // | |
ae96e41f | 895 | |
942a9039 | 896 | fTreeK = tree; |
897 | ||
21bf7095 | 898 | AliDebug(1, "Connecting TreeK"); |
88cb7938 | 899 | if (fTreeK == 0x0) |
900 | { | |
901 | if (TreeK() == 0x0) | |
902 | { | |
21bf7095 | 903 | AliFatal("Parameter is NULL");//we don't like such a jokes |
88cb7938 | 904 | return; |
905 | } | |
906 | return;//in this case TreeK() calls back this method (ConnectTree) | |
907 | //tree after setting fTreeK, the rest was already executed | |
908 | //it is safe to return now | |
909 | } | |
910 | ||
911 | // Create a branch for particles | |
912 | ||
21bf7095 | 913 | AliDebug(2, Form("Tree name is %s",fTreeK->GetName())); |
88cb7938 | 914 | |
915 | if (fTreeK->GetDirectory()) | |
916 | { | |
21bf7095 | 917 | AliDebug(2, Form("and dir is %s",fTreeK->GetDirectory()->GetName())); |
88cb7938 | 918 | } |
919 | else | |
21bf7095 | 920 | AliWarning("DIR IS NOT SET !!!"); |
88cb7938 | 921 | |
942a9039 | 922 | TBranch *branch=fTreeK->GetBranch("Particles"); |
88cb7938 | 923 | if(branch == 0x0) |
924 | { | |
942a9039 | 925 | branch = fTreeK->Branch("Particles", "TParticle", &fParticleBuffer, 4000); |
21bf7095 | 926 | AliDebug(2, "Creating Branch in Tree"); |
88cb7938 | 927 | } |
928 | else | |
929 | { | |
21bf7095 | 930 | AliDebug(2, "Branch Found in Tree"); |
88cb7938 | 931 | branch->SetAddress(&fParticleBuffer); |
932 | } | |
933 | if (branch->GetDirectory()) | |
934 | { | |
21bf7095 | 935 | AliDebug(1, Form("Branch Dir Name is %s",branch->GetDirectory()->GetName())); |
88cb7938 | 936 | } |
937 | else | |
21bf7095 | 938 | AliWarning("Branch Dir is NOT SET"); |
9e1a0ddb | 939 | } |
88cb7938 | 940 | |
5d8718b8 | 941 | //_____________________________________________________________________________ |
88cb7938 | 942 | |
943 | Bool_t AliStack::GetEvent() | |
9e1a0ddb | 944 | { |
945 | // | |
946 | // Get new event from TreeK | |
ccf7a81f | 947 | |
9e1a0ddb | 948 | // Reset/Create the particle stack |
88cb7938 | 949 | Int_t size = (Int_t)TreeK()->GetEntries(); |
9e1a0ddb | 950 | ResetArrays(size); |
ccf7a81f | 951 | return kTRUE; |
9e1a0ddb | 952 | } |
88cb7938 | 953 | //_____________________________________________________________________________ |
954 | ||
1fed0e8b | 955 | Bool_t AliStack::IsStable(Int_t pdg) const |
956 | { | |
957 | // | |
958 | // Decide whether particle (pdg) is stable | |
959 | // | |
960 | ||
961 | const Int_t kNstable = 14; | |
962 | Int_t i; | |
963 | ||
964 | Int_t pdgStable[kNstable] = { | |
965 | kGamma, // Photon | |
966 | kElectron, // Electron | |
967 | kMuonPlus, // Muon | |
968 | kPiPlus, // Pion | |
969 | kKPlus, // Kaon | |
970 | kProton, // Proton | |
971 | kNeutron, // Neutron | |
972 | kLambda0, // Lambda_0 | |
973 | kSigmaMinus, // Sigma Minus | |
974 | kSigma0, // Sigma_0 | |
975 | kSigmaPlus, // Sigma Plus | |
976 | 3312, // Xsi Minus | |
977 | 3322, // Xsi | |
978 | 3334, // Omega | |
979 | }; | |
980 | ||
981 | Bool_t isStable = kFALSE; | |
982 | for (i = 0; i < kNstable; i++) { | |
983 | if (pdg == TMath::Abs(pdgStable[i])) { | |
984 | isStable = kTRUE; | |
985 | break; | |
986 | } | |
987 | } | |
988 | ||
989 | return isStable; | |
990 | } | |
991 | ||
992 | Bool_t AliStack::IsPhysicalPrimary(Int_t index) | |
993 | { | |
994 | // | |
995 | // Test if a particle is a physical primary according to the following definition: | |
996 | // Particles produced in the collision including products of strong and | |
997 | // electromagnetic decay and excluding feed-down from weak decays of strange | |
998 | // particles. | |
999 | // | |
1000 | TParticle* p = Particle(index); | |
1001 | Int_t ist = p->GetStatusCode(); | |
1002 | ||
1003 | // | |
1004 | // Initial state particle | |
1005 | if (ist > 20) return kFALSE; | |
1006 | ||
1007 | Int_t pdg = TMath::Abs(p->GetPdgCode()); | |
1008 | ||
1009 | if (!IsStable(pdg)) return kFALSE; | |
1010 | ||
1011 | if (index < GetNprimary()) { | |
1012 | // | |
1013 | // Particle produced by generator | |
1014 | return kTRUE; | |
1015 | } else { | |
1016 | // | |
1017 | // Particle produced during transport | |
1018 | // | |
1b13a70f | 1019 | |
1fed0e8b | 1020 | Int_t imo = p->GetFirstMother(); |
1021 | TParticle* pm = Particle(imo); | |
1022 | Int_t mpdg = TMath::Abs(pm->GetPdgCode()); | |
1b13a70f | 1023 | // Check if it comes from a pi0 decay |
1024 | // | |
1025 | // What about the pi0 Dalitz ?? | |
1026 | // if ((mpdg == kPi0) && (imo < GetNprimary())) return kTRUE; | |
1027 | ||
1028 | // Check if this is a heavy flavor decay product | |
1fed0e8b | 1029 | Int_t mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); |
1030 | // | |
1031 | // Light hadron | |
1032 | if (mfl < 4) return kFALSE; | |
1033 | ||
1034 | // | |
1035 | // Heavy flavor hadron produced by generator | |
1036 | if (imo < GetNprimary()) { | |
1037 | return kTRUE; | |
1038 | } | |
1039 | ||
1040 | // To be sure that heavy flavor has not been produced in a secondary interaction | |
1041 | // Loop back to the generated mother | |
1042 | while (imo >= GetNprimary()) { | |
1b13a70f | 1043 | imo = pm->GetFirstMother(); |
1fed0e8b | 1044 | pm = Particle(imo); |
1045 | } | |
1046 | mpdg = TMath::Abs(pm->GetPdgCode()); | |
1047 | mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); | |
1048 | ||
1049 | if (mfl < 4) { | |
1050 | return kFALSE; | |
1051 | } else { | |
1052 | return kTRUE; | |
1053 | } | |
1054 | } // produced by generator ? | |
1055 | } |