]>
Commit | Line | Data |
---|---|---|
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 | // | |
137 | // done 0 if the track has to be transported | |
138 | // 1 if not | |
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 | // | |
187 | // done 0 if the track has to be transported | |
188 | // 1 if not | |
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 | ||
219 | if(!done) particle->SetBit(kDoneBit); | |
220 | ||
221 | // Declare that the daughter information is valid | |
222 | particle->SetBit(kDaughtersBit); | |
223 | // Add the particle to the stack | |
6308b375 | 224 | |
225 | ||
9e1a0ddb | 226 | fParticleMap->AddAtAndExpand(particle, fNtrack);//CHECK!! |
227 | ||
228 | if(parent>=0) { | |
942a9039 | 229 | particle = dynamic_cast<TParticle*>(fParticleMap->At(parent)); |
230 | if (particle) { | |
231 | particle->SetLastDaughter(fNtrack); | |
232 | if(particle->GetFirstDaughter()<0) particle->SetFirstDaughter(fNtrack); | |
233 | } | |
234 | else { | |
235 | AliError(Form("Parent %d does not exist",parent)); | |
236 | } | |
237 | } else { | |
238 | // | |
239 | // This is a primary track. Set high water mark for this event | |
240 | fHgwmk = fNtrack; | |
241 | // | |
242 | // Set also number if primary tracks | |
243 | fNprimary = fHgwmk+1; | |
244 | fCurrentPrimary++; | |
9e1a0ddb | 245 | } |
246 | ntr = fNtrack++; | |
247 | } | |
248 | ||
249 | //_____________________________________________________________________________ | |
642f15cf | 250 | TParticle* AliStack::PopNextTrack(Int_t& itrack) |
b9d0a01d | 251 | { |
252 | // | |
253 | // Returns next track from stack of particles | |
254 | // | |
255 | ||
256 | ||
257 | TParticle* track = GetNextParticle(); | |
258 | ||
259 | if (track) { | |
260 | itrack = fCurrent; | |
261 | track->SetBit(kDoneBit); | |
262 | } | |
fe046ade | 263 | else |
b9d0a01d | 264 | itrack = -1; |
fe046ade | 265 | |
266 | fCurrentTrack = track; | |
b9d0a01d | 267 | return track; |
268 | } | |
269 | ||
b9d0a01d | 270 | //_____________________________________________________________________________ |
642f15cf | 271 | TParticle* AliStack::PopPrimaryForTracking(Int_t i) |
b9d0a01d | 272 | { |
273 | // | |
274 | // Returns i-th primary particle if it is flagged to be tracked, | |
275 | // 0 otherwise | |
276 | // | |
277 | ||
278 | TParticle* particle = Particle(i); | |
279 | ||
280 | if (!particle->TestBit(kDoneBit)) | |
281 | return particle; | |
282 | else | |
283 | return 0; | |
284 | } | |
285 | ||
9e1a0ddb | 286 | //_____________________________________________________________________________ |
287 | void AliStack::PurifyKine() | |
288 | { | |
289 | // | |
290 | // Compress kinematic tree keeping only flagged particles | |
291 | // and renaming the particle id's in all the hits | |
292 | // | |
293 | ||
294 | TObjArray &particles = *fParticleMap; | |
295 | int nkeep=fHgwmk+1, parent, i; | |
296 | TParticle *part, *father; | |
942a9039 | 297 | fTrackLabelMap.Set(particles.GetLast()+1); |
9e1a0ddb | 298 | |
299 | // Save in Header total number of tracks before compression | |
9e1a0ddb | 300 | // If no tracks generated return now |
301 | if(fHgwmk+1 == fNtrack) return; | |
302 | ||
9e1a0ddb | 303 | // First pass, invalid Daughter information |
942a9039 | 304 | for(i=0; i<fNtrack; i++) { |
305 | // Preset map, to be removed later | |
306 | if(i<=fHgwmk) fTrackLabelMap[i]=i ; | |
307 | else { | |
308 | fTrackLabelMap[i] = -99; | |
309 | if((part=dynamic_cast<TParticle*>(particles.At(i)))) { | |
e44c5340 | 310 | // |
311 | // Check of this track should be kept for physics reasons | |
942a9039 | 312 | if (KeepPhysics(part)) KeepTrack(i); |
e44c5340 | 313 | // |
942a9039 | 314 | part->ResetBit(kDaughtersBit); |
315 | part->SetFirstDaughter(-1); | |
316 | part->SetLastDaughter(-1); | |
317 | } | |
76969085 | 318 | } |
9e1a0ddb | 319 | } |
320 | // Invalid daughter information for the parent of the first particle | |
321 | // generated. This may or may not be the current primary according to | |
322 | // whether decays have been recorded among the primaries | |
e2afb3b6 | 323 | part = dynamic_cast<TParticle*>(particles.At(fHgwmk+1)); |
9e1a0ddb | 324 | particles.At(part->GetFirstMother())->ResetBit(kDaughtersBit); |
325 | // Second pass, build map between old and new numbering | |
326 | for(i=fHgwmk+1; i<fNtrack; i++) { | |
942a9039 | 327 | if(particles.At(i)->TestBit(kKeepBit)) { |
328 | ||
329 | // This particle has to be kept | |
330 | fTrackLabelMap[i]=nkeep; | |
331 | // If old and new are different, have to move the pointer | |
332 | if(i!=nkeep) particles[nkeep]=particles.At(i); | |
333 | part = dynamic_cast<TParticle*>(particles.At(nkeep)); | |
334 | ||
335 | // as the parent is always *before*, it must be already | |
336 | // in place. This is what we are checking anyway! | |
337 | if((parent=part->GetFirstMother())>fHgwmk) | |
338 | if(fTrackLabelMap[parent]==-99) Fatal("PurifyKine","fTrackLabelMap[%d] = -99!\n",parent); | |
339 | else part->SetFirstMother(fTrackLabelMap[parent]); | |
340 | ||
341 | nkeep++; | |
342 | } | |
9e1a0ddb | 343 | } |
344 | ||
345 | // Fix daughters information | |
346 | for (i=fHgwmk+1; i<nkeep; i++) { | |
942a9039 | 347 | part = dynamic_cast<TParticle*>(particles.At(i)); |
348 | parent = part->GetFirstMother(); | |
349 | if(parent>=0) { | |
350 | father = dynamic_cast<TParticle*>(particles.At(parent)); | |
351 | if(father->TestBit(kDaughtersBit)) { | |
352 | ||
353 | if(i<father->GetFirstDaughter()) father->SetFirstDaughter(i); | |
354 | if(i>father->GetLastDaughter()) father->SetLastDaughter(i); | |
355 | } else { | |
356 | // Initialise daughters info for first pass | |
357 | father->SetFirstDaughter(i); | |
358 | father->SetLastDaughter(i); | |
359 | father->SetBit(kDaughtersBit); | |
360 | } | |
9e1a0ddb | 361 | } |
9e1a0ddb | 362 | } |
942a9039 | 363 | // |
364 | // Now the output bit, from fHgwmk to nkeep we write everything and we erase | |
365 | if(nkeep > fParticleFileMap.GetSize()) fParticleFileMap.Set(Int_t (nkeep*1.5)); | |
366 | for (i=fHgwmk+1; i<nkeep; ++i) { | |
367 | fParticleBuffer = dynamic_cast<TParticle*>(particles.At(i)); | |
368 | fParticleFileMap[i]=static_cast<Int_t>(TreeK()->GetEntries()); | |
369 | TreeK()->Fill(); | |
370 | particles[i]=fParticleBuffer=0; | |
371 | } | |
9e1a0ddb | 372 | |
942a9039 | 373 | for (i=nkeep; i<fNtrack; ++i) particles[i]=0; |
6308b375 | 374 | |
942a9039 | 375 | Int_t toshrink = fNtrack-fHgwmk-1; |
376 | fLoadPoint-=toshrink; | |
2b22f272 | 377 | |
942a9039 | 378 | |
379 | for(i=fLoadPoint; i<fLoadPoint+toshrink; ++i) fParticles->RemoveAt(i); | |
380 | fNtrack=nkeep; | |
381 | fHgwmk=nkeep-1; | |
6308b375 | 382 | } |
383 | ||
384 | void AliStack::ReorderKine() | |
385 | { | |
386 | // | |
387 | // In some transport code children might not come in a continuous sequence. | |
388 | // In this case the stack has to be reordered in order to establish the | |
389 | // mother daughter relation using index ranges. | |
390 | // | |
391 | if(fHgwmk+1 == fNtrack) return; | |
392 | ||
393 | // | |
394 | // Howmany secondaries have been produced ? | |
395 | Int_t nNew = fNtrack - fHgwmk - 1; | |
a1d92a3f | 396 | |
6308b375 | 397 | if (nNew > 0) { |
398 | Int_t i, j; | |
399 | TObjArray &particles = *fParticleMap; | |
400 | TArrayI map1(nNew); | |
401 | // | |
402 | // Copy pointers to temporary array | |
403 | TParticle** tmp = new TParticle*[nNew]; | |
404 | ||
405 | for (i = 0; i < nNew; i++) { | |
406 | if (particles.At(fHgwmk + 1 + i)) { | |
6308b375 | 407 | tmp[i] = (TParticle*) (particles.At(fHgwmk + 1 + i)); |
6308b375 | 408 | } else { |
409 | tmp[i] = 0x0; | |
410 | } | |
411 | map1[i] = -99; | |
412 | } | |
413 | ||
414 | ||
415 | // | |
416 | // Reset LoadPoint | |
417 | // | |
418 | fLoadPoint = fHgwmk + 1; | |
419 | // | |
420 | // Re-Push particles into stack | |
421 | // The outer loop is over parents, the inner over children. | |
422 | // -1 refers to the primary particle | |
423 | // | |
a1d92a3f | 424 | for (i = -1; i < nNew-1; i++) { |
6308b375 | 425 | Int_t ipa; |
426 | TParticle* parP; | |
427 | if (i == -1) { | |
428 | ipa = tmp[0]->GetFirstMother(); | |
429 | parP =dynamic_cast<TParticle*>(particles.At(ipa)); | |
430 | } else { | |
431 | ipa = (fHgwmk + 1 + i); | |
432 | // Skip deleted particles | |
433 | if (!tmp[i]) continue; | |
434 | // Skip particles without children | |
435 | if (tmp[i]->GetFirstDaughter() == -1) continue; | |
436 | parP = tmp[i]; | |
437 | } | |
438 | // Reset daughter information | |
a1d92a3f | 439 | |
440 | Int_t idaumin = parP->GetFirstDaughter() - fHgwmk - 1; | |
441 | Int_t idaumax = parP->GetLastDaughter() - fHgwmk - 1; | |
6308b375 | 442 | parP->SetFirstDaughter(-1); |
443 | parP->SetLastDaughter(-1); | |
a1d92a3f | 444 | for (j = idaumin; j <= idaumax; j++) { |
6308b375 | 445 | // Skip deleted particles |
446 | if (!tmp[j]) continue; | |
447 | // Skip particles already handled | |
448 | if (map1[j] != -99) continue; | |
449 | Int_t jpa = tmp[j]->GetFirstMother(); | |
450 | // Check if daughter of current parent | |
451 | if (jpa == ipa) { | |
452 | particles[fLoadPoint] = tmp[j]; | |
453 | // Re-establish daughter information | |
454 | parP->SetLastDaughter(fLoadPoint); | |
455 | if (parP->GetFirstDaughter() == -1) parP->SetFirstDaughter(fLoadPoint); | |
456 | // Set Mother information | |
457 | if (i != -1) { | |
458 | tmp[j]->SetFirstMother(map1[i]); | |
459 | } | |
460 | // Build the map | |
461 | map1[j] = fLoadPoint; | |
462 | // Increase load point | |
463 | fLoadPoint++; | |
464 | } | |
465 | } // children | |
466 | } // parents | |
467 | ||
468 | delete[] tmp; | |
469 | ||
470 | // | |
471 | // Build map for remapping of hits | |
472 | // | |
942a9039 | 473 | fTrackLabelMap.Set(fNtrack); |
6308b375 | 474 | for (i = 0; i < fNtrack; i ++) { |
475 | if (i <= fHgwmk) { | |
942a9039 | 476 | fTrackLabelMap[i] = i; |
6308b375 | 477 | } else{ |
942a9039 | 478 | fTrackLabelMap[i] = map1[i - fHgwmk -1]; |
6308b375 | 479 | } |
480 | } | |
6308b375 | 481 | } // new particles poduced |
9e1a0ddb | 482 | } |
483 | ||
e44c5340 | 484 | Bool_t AliStack::KeepPhysics(TParticle* part) |
485 | { | |
486 | // | |
487 | // Some particles have to kept on the stack for reasons motivated | |
488 | // by physics analysis. Decision is put here. | |
489 | // | |
490 | Bool_t keep = kFALSE; | |
491 | // | |
492 | // Keep first-generation daughter from primaries with heavy flavor | |
493 | // | |
494 | Int_t parent = part->GetFirstMother(); | |
495 | if (parent >= 0 && parent <= fHgwmk) { | |
e2afb3b6 | 496 | TParticle* father = dynamic_cast<TParticle*>(Particles()->At(parent)); |
e44c5340 | 497 | Int_t kf = father->GetPdgCode(); |
498 | kf = TMath::Abs(kf); | |
499 | Int_t kfl = kf; | |
500 | // meson ? | |
501 | if (kfl > 10) kfl/=100; | |
502 | // baryon | |
503 | if (kfl > 10) kfl/=10; | |
504 | if (kfl > 10) kfl/=10; | |
505 | if (kfl >= 4) { | |
506 | keep = kTRUE; | |
507 | } | |
508 | } | |
509 | return keep; | |
510 | } | |
511 | ||
9e1a0ddb | 512 | //_____________________________________________________________________________ |
513 | void AliStack::FinishEvent() | |
514 | { | |
88cb7938 | 515 | // |
516 | // Write out the kinematics that was not yet filled | |
517 | // | |
9e1a0ddb | 518 | |
88cb7938 | 519 | // Update event header |
9e1a0ddb | 520 | |
88cb7938 | 521 | if (!TreeK()) { |
9e1a0ddb | 522 | // Fatal("FinishEvent", "No kinematics tree is defined."); |
523 | // Don't panic this is a probably a lego run | |
524 | return; | |
9e1a0ddb | 525 | } |
526 | ||
527 | CleanParents(); | |
942a9039 | 528 | if(TreeK()->GetEntries() ==0) { |
9e1a0ddb | 529 | // set the fParticleFileMap size for the first time |
530 | fParticleFileMap.Set(fHgwmk+1); | |
531 | } | |
532 | ||
533 | Bool_t allFilled = kFALSE; | |
534 | TObject *part; | |
535 | for(Int_t i=0; i<fHgwmk+1; ++i) | |
536 | if((part=fParticleMap->At(i))) { | |
e2afb3b6 | 537 | fParticleBuffer = dynamic_cast<TParticle*>(part); |
88cb7938 | 538 | fParticleFileMap[i]= static_cast<Int_t>(TreeK()->GetEntries()); |
539 | TreeK()->Fill(); | |
da2af24c | 540 | fParticleBuffer=0; |
541 | fParticleMap->AddAt(0,i); | |
9e1a0ddb | 542 | |
543 | // When all primaries were filled no particle!=0 | |
544 | // should be left => to be removed later. | |
21bf7095 | 545 | if (allFilled) AliWarning(Form("Why != 0 part # %d?\n",i)); |
9e1a0ddb | 546 | } |
88cb7938 | 547 | else |
548 | { | |
9e1a0ddb | 549 | // // printf("Why = 0 part # %d?\n",i); => We know. |
550 | // break; | |
88cb7938 | 551 | // we don't break now in order to be sure there is no |
552 | // particle !=0 left. | |
553 | // To be removed later and replaced with break. | |
554 | if(!allFilled) allFilled = kTRUE; | |
555 | } | |
9e1a0ddb | 556 | } |
9e1a0ddb | 557 | //_____________________________________________________________________________ |
88cb7938 | 558 | |
9e1a0ddb | 559 | void AliStack::FlagTrack(Int_t track) |
560 | { | |
561 | // | |
562 | // Flags a track and all its family tree to be kept | |
563 | // | |
564 | ||
565 | TParticle *particle; | |
566 | ||
567 | Int_t curr=track; | |
568 | while(1) { | |
e2afb3b6 | 569 | particle=dynamic_cast<TParticle*>(fParticleMap->At(curr)); |
9e1a0ddb | 570 | |
571 | // If the particle is flagged the three from here upward is saved already | |
572 | if(particle->TestBit(kKeepBit)) return; | |
573 | ||
574 | // Save this particle | |
575 | particle->SetBit(kKeepBit); | |
576 | ||
577 | // Move to father if any | |
578 | if((curr=particle->GetFirstMother())==-1) return; | |
579 | } | |
580 | } | |
581 | ||
582 | //_____________________________________________________________________________ | |
ed54bf31 | 583 | void AliStack::KeepTrack(Int_t track) |
9e1a0ddb | 584 | { |
585 | // | |
586 | // Flags a track to be kept | |
587 | // | |
588 | ||
589 | fParticleMap->At(track)->SetBit(kKeepBit); | |
590 | } | |
591 | ||
592 | //_____________________________________________________________________________ | |
593 | void AliStack::Reset(Int_t size) | |
594 | { | |
595 | // | |
596 | // Resets stack | |
597 | // | |
88cb7938 | 598 | |
9e1a0ddb | 599 | fNtrack=0; |
600 | fNprimary=0; | |
601 | fHgwmk=0; | |
602 | fLoadPoint=0; | |
603 | fCurrent = -1; | |
88cb7938 | 604 | fTreeK = 0x0; |
9e1a0ddb | 605 | ResetArrays(size); |
606 | } | |
607 | ||
608 | //_____________________________________________________________________________ | |
609 | void AliStack::ResetArrays(Int_t size) | |
610 | { | |
611 | // | |
612 | // Resets stack arrays | |
613 | // | |
614 | ||
be3380a3 | 615 | if (fParticles) |
616 | fParticles->Clear(); | |
617 | else | |
618 | fParticles = new TClonesArray("TParticle",1000); | |
619 | if (fParticleMap) { | |
620 | fParticleMap->Clear(); | |
621 | if (size>0) fParticleMap->Expand(size);} | |
622 | else | |
623 | fParticleMap = new TObjArray(size); | |
9e1a0ddb | 624 | } |
625 | ||
626 | //_____________________________________________________________________________ | |
e2afb3b6 | 627 | void AliStack::SetHighWaterMark(Int_t) |
9e1a0ddb | 628 | { |
629 | // | |
630 | // Set high water mark for last track in event | |
631 | // | |
6308b375 | 632 | |
942a9039 | 633 | fHgwmk = fNtrack-1; |
634 | fCurrentPrimary=fHgwmk; | |
635 | // Set also number of primary tracks | |
636 | fNprimary = fHgwmk+1; | |
9e1a0ddb | 637 | } |
638 | ||
639 | //_____________________________________________________________________________ | |
640 | TParticle* AliStack::Particle(Int_t i) | |
641 | { | |
642 | // | |
643 | // Return particle with specified ID | |
942a9039 | 644 | |
da2af24c | 645 | if(!fParticleMap->At(i)) { |
911a3148 | 646 | Int_t nentries = fParticles->GetEntriesFast(); |
9e1a0ddb | 647 | // algorithmic way of getting entry index |
648 | // (primary particles are filled after secondaries) | |
e94530da | 649 | Int_t entry = TreeKEntry(i); |
9e1a0ddb | 650 | // check whether algorithmic way and |
651 | // and the fParticleFileMap[i] give the same; | |
652 | // give the fatal error if not | |
653 | if (entry != fParticleFileMap[i]) { | |
21bf7095 | 654 | AliFatal(Form( |
9e1a0ddb | 655 | "!! The algorithmic way and map are different: !!\n entry: %d map: %d", |
21bf7095 | 656 | entry, fParticleFileMap[i])); |
9e1a0ddb | 657 | } |
942a9039 | 658 | // Load particle at entry into fParticleBuffer |
88cb7938 | 659 | TreeK()->GetEntry(entry); |
942a9039 | 660 | // Add to the TClonesarray |
9e1a0ddb | 661 | new ((*fParticles)[nentries]) TParticle(*fParticleBuffer); |
942a9039 | 662 | // Store a pointer in the TObjArray |
9e1a0ddb | 663 | fParticleMap->AddAt((*fParticles)[nentries],i); |
664 | } | |
e2afb3b6 | 665 | return dynamic_cast<TParticle*>(fParticleMap->At(i)); |
9e1a0ddb | 666 | } |
667 | ||
e94530da | 668 | //_____________________________________________________________________________ |
669 | TParticle* AliStack::ParticleFromTreeK(Int_t id) const | |
670 | { | |
671 | // | |
672 | // return pointer to TParticle with label id | |
673 | // | |
674 | Int_t entry; | |
675 | if ((entry = TreeKEntry(id)) < 0) return 0; | |
676 | if (fTreeK->GetEntry(entry)<=0) return 0; | |
677 | return fParticleBuffer; | |
678 | } | |
679 | ||
680 | //_____________________________________________________________________________ | |
681 | Int_t AliStack::TreeKEntry(Int_t id) const | |
682 | { | |
683 | // | |
942a9039 | 684 | // Return entry number in the TreeK for particle with label id |
685 | // Return negative number if label>fNtrack | |
686 | // | |
687 | // The order of particles in TreeK reflects the order of the transport of primaries and production of secondaries: | |
e94530da | 688 | // |
942a9039 | 689 | // Before transport there are fNprimary particles on the stack. |
690 | // They are transported one by one and secondaries (fNtrack - fNprimary) are produced. | |
691 | // After the transport of each particles secondaries are written to the TreeK | |
692 | // They occupy the entries 0 ... fNtrack - fNprimary - 1 | |
693 | // The primaries are written after they have been transported and occupy | |
694 | // fNtrack - fNprimary .. fNtrack - 1 | |
695 | ||
e94530da | 696 | Int_t entry; |
697 | if (id<fNprimary) | |
698 | entry = id+fNtrack-fNprimary; | |
699 | else | |
700 | entry = id-fNprimary; | |
701 | return entry; | |
702 | } | |
703 | ||
5d8718b8 | 704 | //_____________________________________________________________________________ |
642f15cf | 705 | Int_t AliStack::GetCurrentParentTrackNumber() const |
5d8718b8 | 706 | { |
707 | // | |
708 | // Return number of the parent of the current track | |
709 | // | |
710 | ||
711 | TParticle* current = (TParticle*)fParticleMap->At(fCurrent); | |
712 | ||
713 | if (current) | |
714 | return current->GetFirstMother(); | |
715 | else { | |
21bf7095 | 716 | AliWarning("Current track not found in the stack"); |
5d8718b8 | 717 | return -1; |
718 | } | |
719 | } | |
720 | ||
9e1a0ddb | 721 | //_____________________________________________________________________________ |
f5f55563 | 722 | Int_t AliStack::GetPrimary(Int_t id) |
9e1a0ddb | 723 | { |
724 | // | |
725 | // Return number of primary that has generated track | |
726 | // | |
727 | ||
728 | int current, parent; | |
9e1a0ddb | 729 | // |
730 | parent=id; | |
731 | while (1) { | |
732 | current=parent; | |
f5f55563 | 733 | parent=Particle(current)->GetFirstMother(); |
9e1a0ddb | 734 | if(parent<0) return current; |
735 | } | |
736 | } | |
737 | ||
738 | //_____________________________________________________________________________ | |
739 | void AliStack::DumpPart (Int_t i) const | |
740 | { | |
741 | // | |
742 | // Dumps particle i in the stack | |
743 | // | |
e2afb3b6 | 744 | dynamic_cast<TParticle*>(fParticleMap->At(i))->Print(); |
9e1a0ddb | 745 | } |
746 | ||
747 | //_____________________________________________________________________________ | |
748 | void AliStack::DumpPStack () | |
749 | { | |
750 | // | |
751 | // Dumps the particle stack | |
752 | // | |
753 | ||
3ab6f951 | 754 | Int_t i; |
755 | ||
88cb7938 | 756 | printf("\n\n=======================================================================\n"); |
3ab6f951 | 757 | for (i=0;i<fNtrack;i++) |
9e1a0ddb | 758 | { |
759 | TParticle* particle = Particle(i); | |
760 | if (particle) { | |
761 | printf("-> %d ",i); particle->Print(); | |
762 | printf("--------------------------------------------------------------\n"); | |
763 | } | |
764 | else | |
765 | Warning("DumpPStack", "No particle with id %d.", i); | |
766 | } | |
767 | ||
88cb7938 | 768 | printf("\n=======================================================================\n\n"); |
9e1a0ddb | 769 | |
770 | // print particle file map | |
771 | printf("\nParticle file map: \n"); | |
3ab6f951 | 772 | for (i=0; i<fNtrack; i++) |
9e1a0ddb | 773 | printf(" %d th entry: %d \n",i,fParticleFileMap[i]); |
774 | } | |
775 | ||
776 | ||
777 | //_____________________________________________________________________________ | |
778 | void AliStack::DumpLoadedStack() const | |
779 | { | |
780 | // | |
781 | // Dumps the particle in the stack | |
782 | // that are loaded in memory. | |
783 | // | |
784 | ||
785 | TObjArray &particles = *fParticleMap; | |
786 | printf( | |
787 | "\n\n=======================================================================\n"); | |
788 | for (Int_t i=0;i<fNtrack;i++) | |
789 | { | |
e2afb3b6 | 790 | TParticle* particle = dynamic_cast<TParticle*>(particles[i]); |
9e1a0ddb | 791 | if (particle) { |
792 | printf("-> %d ",i); particle->Print(); | |
793 | printf("--------------------------------------------------------------\n"); | |
794 | } | |
795 | else { | |
796 | printf("-> %d Particle not loaded.\n",i); | |
797 | printf("--------------------------------------------------------------\n"); | |
798 | } | |
799 | } | |
800 | printf( | |
801 | "\n=======================================================================\n\n"); | |
802 | } | |
803 | ||
804 | // | |
805 | // protected methods | |
806 | // | |
807 | ||
808 | //_____________________________________________________________________________ | |
809 | void AliStack::CleanParents() | |
810 | { | |
811 | // | |
812 | // Clean particles stack | |
813 | // Set parent/daughter relations | |
814 | // | |
815 | ||
816 | TObjArray &particles = *fParticleMap; | |
817 | TParticle *part; | |
818 | int i; | |
819 | for(i=0; i<fHgwmk+1; i++) { | |
e2afb3b6 | 820 | part = dynamic_cast<TParticle*>(particles.At(i)); |
9e1a0ddb | 821 | if(part) if(!part->TestBit(kDaughtersBit)) { |
822 | part->SetFirstDaughter(-1); | |
823 | part->SetLastDaughter(-1); | |
824 | } | |
825 | } | |
826 | } | |
827 | ||
828 | //_____________________________________________________________________________ | |
829 | TParticle* AliStack::GetNextParticle() | |
830 | { | |
831 | // | |
832 | // Return next particle from stack of particles | |
833 | // | |
834 | ||
835 | TParticle* particle = 0; | |
836 | ||
837 | // search secondaries | |
838 | //for(Int_t i=fNtrack-1; i>=0; i--) { | |
839 | for(Int_t i=fNtrack-1; i>fHgwmk; i--) { | |
e2afb3b6 | 840 | particle = dynamic_cast<TParticle*>(fParticleMap->At(i)); |
9e1a0ddb | 841 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
842 | fCurrent=i; | |
9e1a0ddb | 843 | return particle; |
844 | } | |
845 | } | |
846 | ||
847 | // take next primary if all secondaries were done | |
848 | while (fCurrentPrimary>=0) { | |
849 | fCurrent = fCurrentPrimary; | |
e2afb3b6 | 850 | particle = dynamic_cast<TParticle*>(fParticleMap->At(fCurrentPrimary--)); |
9e1a0ddb | 851 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
9e1a0ddb | 852 | return particle; |
853 | } | |
854 | } | |
855 | ||
856 | // nothing to be tracked | |
857 | fCurrent = -1; | |
6308b375 | 858 | |
859 | ||
9e1a0ddb | 860 | return particle; |
861 | } | |
88cb7938 | 862 | //__________________________________________________________________________________________ |
9e1a0ddb | 863 | |
88cb7938 | 864 | TTree* AliStack::TreeK() |
865 | { | |
866 | //returns TreeK | |
942a9039 | 867 | return fTreeK; |
88cb7938 | 868 | } |
9e1a0ddb | 869 | //__________________________________________________________________________________________ |
88cb7938 | 870 | |
942a9039 | 871 | void AliStack::ConnectTree(TTree* tree) |
9e1a0ddb | 872 | { |
873 | // | |
88cb7938 | 874 | // Creates branch for writing particles |
875 | // | |
942a9039 | 876 | |
877 | fTreeK = tree; | |
878 | ||
21bf7095 | 879 | AliDebug(1, "Connecting TreeK"); |
88cb7938 | 880 | if (fTreeK == 0x0) |
881 | { | |
882 | if (TreeK() == 0x0) | |
883 | { | |
21bf7095 | 884 | AliFatal("Parameter is NULL");//we don't like such a jokes |
88cb7938 | 885 | return; |
886 | } | |
887 | return;//in this case TreeK() calls back this method (ConnectTree) | |
888 | //tree after setting fTreeK, the rest was already executed | |
889 | //it is safe to return now | |
890 | } | |
891 | ||
892 | // Create a branch for particles | |
893 | ||
21bf7095 | 894 | AliDebug(2, Form("Tree name is %s",fTreeK->GetName())); |
88cb7938 | 895 | |
896 | if (fTreeK->GetDirectory()) | |
897 | { | |
21bf7095 | 898 | AliDebug(2, Form("and dir is %s",fTreeK->GetDirectory()->GetName())); |
88cb7938 | 899 | } |
900 | else | |
21bf7095 | 901 | AliWarning("DIR IS NOT SET !!!"); |
88cb7938 | 902 | |
942a9039 | 903 | TBranch *branch=fTreeK->GetBranch("Particles"); |
88cb7938 | 904 | if(branch == 0x0) |
905 | { | |
942a9039 | 906 | branch = fTreeK->Branch("Particles", "TParticle", &fParticleBuffer, 4000); |
21bf7095 | 907 | AliDebug(2, "Creating Branch in Tree"); |
88cb7938 | 908 | } |
909 | else | |
910 | { | |
21bf7095 | 911 | AliDebug(2, "Branch Found in Tree"); |
88cb7938 | 912 | branch->SetAddress(&fParticleBuffer); |
913 | } | |
914 | if (branch->GetDirectory()) | |
915 | { | |
21bf7095 | 916 | AliDebug(1, Form("Branch Dir Name is %s",branch->GetDirectory()->GetName())); |
88cb7938 | 917 | } |
918 | else | |
21bf7095 | 919 | AliWarning("Branch Dir is NOT SET"); |
9e1a0ddb | 920 | } |
88cb7938 | 921 | //__________________________________________________________________________________________ |
9e1a0ddb | 922 | |
88cb7938 | 923 | |
924 | void AliStack::BeginEvent() | |
9e1a0ddb | 925 | { |
926 | // start a new event | |
88cb7938 | 927 | Reset(); |
9e1a0ddb | 928 | } |
929 | ||
81694e6a | 930 | //_____________________________________________________________________________ |
9e1a0ddb | 931 | void AliStack::FinishRun() |
932 | { | |
933 | // Clean TreeK information | |
9e1a0ddb | 934 | } |
5d8718b8 | 935 | //_____________________________________________________________________________ |
88cb7938 | 936 | |
937 | Bool_t AliStack::GetEvent() | |
9e1a0ddb | 938 | { |
939 | // | |
940 | // Get new event from TreeK | |
ccf7a81f | 941 | |
9e1a0ddb | 942 | // Reset/Create the particle stack |
88cb7938 | 943 | Int_t size = (Int_t)TreeK()->GetEntries(); |
9e1a0ddb | 944 | ResetArrays(size); |
ccf7a81f | 945 | return kTRUE; |
9e1a0ddb | 946 | } |
88cb7938 | 947 | //_____________________________________________________________________________ |
948 | ||
1fed0e8b | 949 | Bool_t AliStack::IsStable(Int_t pdg) const |
950 | { | |
951 | // | |
952 | // Decide whether particle (pdg) is stable | |
953 | // | |
954 | ||
955 | const Int_t kNstable = 14; | |
956 | Int_t i; | |
957 | ||
958 | Int_t pdgStable[kNstable] = { | |
959 | kGamma, // Photon | |
960 | kElectron, // Electron | |
961 | kMuonPlus, // Muon | |
962 | kPiPlus, // Pion | |
963 | kKPlus, // Kaon | |
964 | kProton, // Proton | |
965 | kNeutron, // Neutron | |
966 | kLambda0, // Lambda_0 | |
967 | kSigmaMinus, // Sigma Minus | |
968 | kSigma0, // Sigma_0 | |
969 | kSigmaPlus, // Sigma Plus | |
970 | 3312, // Xsi Minus | |
971 | 3322, // Xsi | |
972 | 3334, // Omega | |
973 | }; | |
974 | ||
975 | Bool_t isStable = kFALSE; | |
976 | for (i = 0; i < kNstable; i++) { | |
977 | if (pdg == TMath::Abs(pdgStable[i])) { | |
978 | isStable = kTRUE; | |
979 | break; | |
980 | } | |
981 | } | |
982 | ||
983 | return isStable; | |
984 | } | |
985 | ||
986 | Bool_t AliStack::IsPhysicalPrimary(Int_t index) | |
987 | { | |
988 | // | |
989 | // Test if a particle is a physical primary according to the following definition: | |
990 | // Particles produced in the collision including products of strong and | |
991 | // electromagnetic decay and excluding feed-down from weak decays of strange | |
992 | // particles. | |
993 | // | |
994 | TParticle* p = Particle(index); | |
995 | Int_t ist = p->GetStatusCode(); | |
996 | ||
997 | // | |
998 | // Initial state particle | |
999 | if (ist > 20) return kFALSE; | |
1000 | ||
1001 | Int_t pdg = TMath::Abs(p->GetPdgCode()); | |
1002 | ||
1003 | if (!IsStable(pdg)) return kFALSE; | |
1004 | ||
1005 | if (index < GetNprimary()) { | |
1006 | // | |
1007 | // Particle produced by generator | |
1008 | return kTRUE; | |
1009 | } else { | |
1010 | // | |
1011 | // Particle produced during transport | |
1012 | // | |
1013 | // Check if this is a heavy flavor decay product | |
1014 | Int_t imo = p->GetFirstMother(); | |
1015 | TParticle* pm = Particle(imo); | |
1016 | Int_t mpdg = TMath::Abs(pm->GetPdgCode()); | |
1017 | Int_t mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); | |
1018 | // | |
1019 | // Light hadron | |
1020 | if (mfl < 4) return kFALSE; | |
1021 | ||
1022 | // | |
1023 | // Heavy flavor hadron produced by generator | |
1024 | if (imo < GetNprimary()) { | |
1025 | return kTRUE; | |
1026 | } | |
1027 | ||
1028 | // To be sure that heavy flavor has not been produced in a secondary interaction | |
1029 | // Loop back to the generated mother | |
1030 | while (imo >= GetNprimary()) { | |
1031 | imo = p->GetFirstMother(); | |
1032 | pm = Particle(imo); | |
1033 | } | |
1034 | mpdg = TMath::Abs(pm->GetPdgCode()); | |
1035 | mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); | |
1036 | ||
1037 | if (mfl < 4) { | |
1038 | return kFALSE; | |
1039 | } else { | |
1040 | return kTRUE; | |
1041 | } | |
1042 | } // produced by generator ? | |
1043 | } | |
1044 |