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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> |
3f5add1a | 32 | #include <TMCProcess.h> |
9e1a0ddb | 33 | #include <TParticle.h> |
fe046ade | 34 | #include <TParticlePDG.h> |
c180f65d | 35 | #include <TDatabasePDG.h> |
9e1a0ddb | 36 | #include <TTree.h> |
942a9039 | 37 | #include <TDirectory.h> |
9e1a0ddb | 38 | |
21bf7095 | 39 | #include "AliLog.h" |
88cb7938 | 40 | #include "AliStack.h" |
9e1a0ddb | 41 | |
42 | ClassImp(AliStack) | |
43 | ||
e2afb3b6 | 44 | //_______________________________________________________________________ |
45 | AliStack::AliStack(): | |
304b9ce3 | 46 | fParticles("TParticle", 1000), |
d94af0c1 | 47 | fParticleMap(), |
e2afb3b6 | 48 | fParticleFileMap(0), |
49 | fParticleBuffer(0), | |
90e48c0c | 50 | fCurrentTrack(0), |
e2afb3b6 | 51 | fTreeK(0), |
52 | fNtrack(0), | |
53 | fNprimary(0), | |
54 | fCurrent(-1), | |
55 | fCurrentPrimary(-1), | |
56 | fHgwmk(0), | |
88cb7938 | 57 | fLoadPoint(0), |
942a9039 | 58 | fTrackLabelMap(0) |
9e1a0ddb | 59 | { |
60 | // | |
e2afb3b6 | 61 | // Default constructor |
9e1a0ddb | 62 | // |
9e1a0ddb | 63 | } |
64 | ||
e2afb3b6 | 65 | //_______________________________________________________________________ |
942a9039 | 66 | AliStack::AliStack(Int_t size, const char* /*evfoldname*/): |
d94af0c1 | 67 | fParticles("TParticle",1000), |
68 | fParticleMap(size), | |
e2afb3b6 | 69 | fParticleFileMap(0), |
70 | fParticleBuffer(0), | |
90e48c0c | 71 | fCurrentTrack(0), |
e2afb3b6 | 72 | fTreeK(0), |
73 | fNtrack(0), | |
74 | fNprimary(0), | |
75 | fCurrent(-1), | |
76 | fCurrentPrimary(-1), | |
77 | fHgwmk(0), | |
88cb7938 | 78 | fLoadPoint(0), |
942a9039 | 79 | fTrackLabelMap(0) |
e2afb3b6 | 80 | { |
81 | // | |
82 | // Constructor | |
83 | // | |
84 | } | |
9e1a0ddb | 85 | |
e2afb3b6 | 86 | //_______________________________________________________________________ |
87 | AliStack::AliStack(const AliStack& st): | |
9938d01c | 88 | TVirtualMCStack(st), |
d94af0c1 | 89 | fParticles("TParticle",1000), |
90 | fParticleMap(*(st.Particles())), | |
9938d01c | 91 | fParticleFileMap(st.fParticleFileMap), |
92 | fParticleBuffer(0), | |
93 | fCurrentTrack(0), | |
94 | fTreeK((TTree*)(st.fTreeK->Clone())), | |
95 | fNtrack(st.GetNtrack()), | |
96 | fNprimary(st.GetNprimary()), | |
97 | fCurrent(-1), | |
98 | fCurrentPrimary(-1), | |
99 | fHgwmk(0), | |
100 | fLoadPoint(0), | |
942a9039 | 101 | fTrackLabelMap(0) |
9e1a0ddb | 102 | { |
9938d01c | 103 | // Copy constructor |
9e1a0ddb | 104 | } |
105 | ||
9938d01c | 106 | |
e2afb3b6 | 107 | //_______________________________________________________________________ |
6c4904c2 | 108 | void AliStack::Copy(TObject&) const |
e2afb3b6 | 109 | { |
21bf7095 | 110 | AliFatal("Not implemented!"); |
e2afb3b6 | 111 | } |
9e1a0ddb | 112 | |
e2afb3b6 | 113 | //_______________________________________________________________________ |
9e1a0ddb | 114 | AliStack::~AliStack() |
115 | { | |
116 | // | |
117 | // Destructor | |
118 | // | |
119 | ||
d94af0c1 | 120 | fParticles.Clear(); |
9e1a0ddb | 121 | } |
122 | ||
123 | // | |
124 | // public methods | |
125 | // | |
126 | ||
127 | //_____________________________________________________________________________ | |
3e2e3ece | 128 | void AliStack::PushTrack(Int_t done, Int_t parent, Int_t pdg, const Float_t *pmom, |
129 | const Float_t *vpos, const Float_t *polar, Float_t tof, | |
88cb7938 | 130 | TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) |
9e1a0ddb | 131 | { |
132 | // | |
133 | // Load a track on the stack | |
134 | // | |
b4bb4536 | 135 | // done 1 if the track has to be transported |
136 | // 0 if not | |
9e1a0ddb | 137 | // parent identifier of the parent track. -1 for a primary |
138 | // pdg particle code | |
139 | // pmom momentum GeV/c | |
140 | // vpos position | |
141 | // polar polarisation | |
142 | // tof time of flight in seconds | |
143 | // mecha production mechanism | |
144 | // ntr on output the number of the track stored | |
145 | // | |
146 | ||
9e1a0ddb | 147 | // const Float_t tlife=0; |
148 | ||
149 | // | |
150 | // Here we get the static mass | |
151 | // For MC is ok, but a more sophisticated method could be necessary | |
152 | // if the calculated mass is required | |
153 | // also, this method is potentially dangerous if the mass | |
154 | // used in the MC is not the same of the PDG database | |
155 | // | |
fe046ade | 156 | TParticlePDG* pmc = TDatabasePDG::Instance()->GetParticle(pdg); |
157 | if (pmc) { | |
158 | Float_t mass = TDatabasePDG::Instance()->GetParticle(pdg)->Mass(); | |
159 | Float_t e=TMath::Sqrt(mass*mass+pmom[0]*pmom[0]+ | |
160 | pmom[1]*pmom[1]+pmom[2]*pmom[2]); | |
161 | ||
ccf7a81f | 162 | // 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", |
163 | // mass,e,fNtrack,pdg,parent,done,vpos[0],vpos[1],vpos[2],pmom[0],pmom[1],pmom[2],kS); | |
164 | ||
9e1a0ddb | 165 | |
642f15cf | 166 | PushTrack(done, parent, pdg, pmom[0], pmom[1], pmom[2], e, |
fe046ade | 167 | vpos[0], vpos[1], vpos[2], tof, polar[0], polar[1], polar[2], |
168 | mech, ntr, weight, is); | |
169 | } else { | |
21bf7095 | 170 | AliWarning(Form("Particle type %d not defined in PDG Database !", pdg)); |
171 | AliWarning("Particle skipped !"); | |
fe046ade | 172 | } |
9e1a0ddb | 173 | } |
174 | ||
175 | //_____________________________________________________________________________ | |
642f15cf | 176 | void AliStack::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
9e1a0ddb | 177 | Double_t px, Double_t py, Double_t pz, Double_t e, |
178 | Double_t vx, Double_t vy, Double_t vz, Double_t tof, | |
179 | Double_t polx, Double_t poly, Double_t polz, | |
98490ea9 | 180 | TMCProcess mech, Int_t &ntr, Double_t weight, Int_t is) |
9e1a0ddb | 181 | { |
182 | // | |
183 | // Load a track on the stack | |
184 | // | |
b4bb4536 | 185 | // done 1 if the track has to be transported |
186 | // 0 if not | |
9e1a0ddb | 187 | // parent identifier of the parent track. -1 for a primary |
188 | // pdg particle code | |
189 | // kS generation status code | |
190 | // px, py, pz momentum GeV/c | |
191 | // vx, vy, vz position | |
192 | // polar polarisation | |
193 | // tof time of flight in seconds | |
194 | // mech production mechanism | |
195 | // ntr on output the number of the track stored | |
196 | // | |
197 | // New method interface: | |
198 | // arguments were changed to be in correspondence with TParticle | |
199 | // constructor. | |
200 | // Note: the energy is not calculated from the static mass but | |
201 | // it is passed by argument e. | |
202 | ||
9e1a0ddb | 203 | const Int_t kFirstDaughter=-1; |
204 | const Int_t kLastDaughter=-1; | |
6308b375 | 205 | |
206 | ||
9e1a0ddb | 207 | TParticle* particle |
d94af0c1 | 208 | = new(fParticles[fLoadPoint++]) |
47c8bcbe | 209 | TParticle(pdg, is, parent, -1, kFirstDaughter, kLastDaughter, |
9e1a0ddb | 210 | px, py, pz, e, vx, vy, vz, tof); |
dde0a601 | 211 | |
9e1a0ddb | 212 | particle->SetPolarisation(polx, poly, polz); |
213 | particle->SetWeight(weight); | |
214 | particle->SetUniqueID(mech); | |
215 | ||
f4414561 | 216 | |
217 | ||
218 | if(!done) { | |
219 | particle->SetBit(kDoneBit); | |
220 | } else { | |
221 | particle->SetBit(kTransportBit); | |
222 | } | |
223 | ||
224 | ||
9e1a0ddb | 225 | |
226 | // Declare that the daughter information is valid | |
227 | particle->SetBit(kDaughtersBit); | |
228 | // Add the particle to the stack | |
6308b375 | 229 | |
d94af0c1 | 230 | fParticleMap.AddAtAndExpand(particle, fNtrack);//CHECK!! |
9e1a0ddb | 231 | |
232 | if(parent>=0) { | |
d58b4b69 | 233 | particle = GetParticleMapEntry(parent); |
942a9039 | 234 | if (particle) { |
235 | particle->SetLastDaughter(fNtrack); | |
236 | if(particle->GetFirstDaughter()<0) particle->SetFirstDaughter(fNtrack); | |
237 | } | |
238 | else { | |
239 | AliError(Form("Parent %d does not exist",parent)); | |
240 | } | |
241 | } else { | |
242 | // | |
243 | // This is a primary track. Set high water mark for this event | |
244 | fHgwmk = fNtrack; | |
245 | // | |
246 | // Set also number if primary tracks | |
247 | fNprimary = fHgwmk+1; | |
248 | fCurrentPrimary++; | |
9e1a0ddb | 249 | } |
250 | ntr = fNtrack++; | |
251 | } | |
252 | ||
253 | //_____________________________________________________________________________ | |
642f15cf | 254 | TParticle* AliStack::PopNextTrack(Int_t& itrack) |
b9d0a01d | 255 | { |
256 | // | |
257 | // Returns next track from stack of particles | |
258 | // | |
259 | ||
260 | ||
261 | TParticle* track = GetNextParticle(); | |
262 | ||
263 | if (track) { | |
264 | itrack = fCurrent; | |
265 | track->SetBit(kDoneBit); | |
266 | } | |
fe046ade | 267 | else |
b9d0a01d | 268 | itrack = -1; |
fe046ade | 269 | |
270 | fCurrentTrack = track; | |
b9d0a01d | 271 | return track; |
272 | } | |
273 | ||
b9d0a01d | 274 | //_____________________________________________________________________________ |
642f15cf | 275 | TParticle* AliStack::PopPrimaryForTracking(Int_t i) |
b9d0a01d | 276 | { |
277 | // | |
278 | // Returns i-th primary particle if it is flagged to be tracked, | |
279 | // 0 otherwise | |
280 | // | |
281 | ||
282 | TParticle* particle = Particle(i); | |
283 | ||
dde0a601 | 284 | if (!particle->TestBit(kDoneBit)) { |
285 | fCurrentTrack = particle; | |
b9d0a01d | 286 | return particle; |
dde0a601 | 287 | } |
b9d0a01d | 288 | else |
289 | return 0; | |
290 | } | |
291 | ||
9e1a0ddb | 292 | //_____________________________________________________________________________ |
77db8cbf | 293 | Bool_t AliStack::PurifyKine() |
9e1a0ddb | 294 | { |
295 | // | |
296 | // Compress kinematic tree keeping only flagged particles | |
297 | // and renaming the particle id's in all the hits | |
298 | // | |
299 | ||
77db8cbf | 300 | int nkeep = fHgwmk + 1, parent, i; |
9e1a0ddb | 301 | TParticle *part, *father; |
d94af0c1 | 302 | fTrackLabelMap.Set(fParticleMap.GetLast()+1); |
9e1a0ddb | 303 | |
304 | // Save in Header total number of tracks before compression | |
9e1a0ddb | 305 | // If no tracks generated return now |
77db8cbf | 306 | if(fHgwmk+1 == fNtrack) return kFALSE; |
9e1a0ddb | 307 | |
9e1a0ddb | 308 | // First pass, invalid Daughter information |
942a9039 | 309 | for(i=0; i<fNtrack; i++) { |
310 | // Preset map, to be removed later | |
311 | if(i<=fHgwmk) fTrackLabelMap[i]=i ; | |
312 | else { | |
313 | fTrackLabelMap[i] = -99; | |
d58b4b69 | 314 | if((part=GetParticleMapEntry(i))) { |
e44c5340 | 315 | // |
316 | // Check of this track should be kept for physics reasons | |
942a9039 | 317 | if (KeepPhysics(part)) KeepTrack(i); |
e44c5340 | 318 | // |
942a9039 | 319 | part->ResetBit(kDaughtersBit); |
320 | part->SetFirstDaughter(-1); | |
321 | part->SetLastDaughter(-1); | |
322 | } | |
76969085 | 323 | } |
9e1a0ddb | 324 | } |
325 | // Invalid daughter information for the parent of the first particle | |
326 | // generated. This may or may not be the current primary according to | |
327 | // whether decays have been recorded among the primaries | |
d58b4b69 | 328 | part = GetParticleMapEntry(fHgwmk+1); |
d94af0c1 | 329 | fParticleMap.At(part->GetFirstMother())->ResetBit(kDaughtersBit); |
9e1a0ddb | 330 | // Second pass, build map between old and new numbering |
331 | for(i=fHgwmk+1; i<fNtrack; i++) { | |
d94af0c1 | 332 | if(fParticleMap.At(i)->TestBit(kKeepBit)) { |
942a9039 | 333 | // This particle has to be kept |
334 | fTrackLabelMap[i]=nkeep; | |
335 | // If old and new are different, have to move the pointer | |
d94af0c1 | 336 | if(i!=nkeep) fParticleMap[nkeep]=fParticleMap.At(i); |
d58b4b69 | 337 | part = GetParticleMapEntry(nkeep); |
942a9039 | 338 | // as the parent is always *before*, it must be already |
339 | // in place. This is what we are checking anyway! | |
f12d42ce | 340 | if((parent=part->GetFirstMother())>fHgwmk) { |
942a9039 | 341 | if(fTrackLabelMap[parent]==-99) Fatal("PurifyKine","fTrackLabelMap[%d] = -99!\n",parent); |
f12d42ce | 342 | else part->SetFirstMother(fTrackLabelMap[parent]);} |
942a9039 | 343 | nkeep++; |
344 | } | |
9e1a0ddb | 345 | } |
346 | ||
347 | // Fix daughters information | |
348 | for (i=fHgwmk+1; i<nkeep; i++) { | |
d58b4b69 | 349 | part = GetParticleMapEntry(i); |
942a9039 | 350 | parent = part->GetFirstMother(); |
351 | if(parent>=0) { | |
d58b4b69 | 352 | father = GetParticleMapEntry(parent); |
942a9039 | 353 | if(father->TestBit(kDaughtersBit)) { |
354 | ||
355 | if(i<father->GetFirstDaughter()) father->SetFirstDaughter(i); | |
356 | if(i>father->GetLastDaughter()) father->SetLastDaughter(i); | |
357 | } else { | |
358 | // Initialise daughters info for first pass | |
359 | father->SetFirstDaughter(i); | |
360 | father->SetLastDaughter(i); | |
361 | father->SetBit(kDaughtersBit); | |
362 | } | |
9e1a0ddb | 363 | } |
9e1a0ddb | 364 | } |
942a9039 | 365 | // |
366 | // Now the output bit, from fHgwmk to nkeep we write everything and we erase | |
367 | if(nkeep > fParticleFileMap.GetSize()) fParticleFileMap.Set(Int_t (nkeep*1.5)); | |
368 | for (i=fHgwmk+1; i<nkeep; ++i) { | |
d58b4b69 | 369 | fParticleBuffer = GetParticleMapEntry(i); |
942a9039 | 370 | fParticleFileMap[i]=static_cast<Int_t>(TreeK()->GetEntries()); |
371 | TreeK()->Fill(); | |
d94af0c1 | 372 | fParticleMap[i]=fParticleBuffer=0; |
942a9039 | 373 | } |
9e1a0ddb | 374 | |
d94af0c1 | 375 | for (i = nkeep; i < fNtrack; ++i) fParticleMap[i]=0; |
6308b375 | 376 | |
942a9039 | 377 | Int_t toshrink = fNtrack-fHgwmk-1; |
378 | fLoadPoint-=toshrink; | |
2b22f272 | 379 | |
d94af0c1 | 380 | for(i=fLoadPoint; i<fLoadPoint+toshrink; ++i) fParticles.RemoveAt(i); |
942a9039 | 381 | fNtrack=nkeep; |
382 | fHgwmk=nkeep-1; | |
77db8cbf | 383 | return kTRUE; |
6308b375 | 384 | } |
385 | ||
1166db55 | 386 | |
77db8cbf | 387 | Bool_t AliStack::ReorderKine() |
6308b375 | 388 | { |
389 | // | |
390 | // In some transport code children might not come in a continuous sequence. | |
391 | // In this case the stack has to be reordered in order to establish the | |
392 | // mother daughter relation using index ranges. | |
393 | // | |
77db8cbf | 394 | if(fHgwmk+1 == fNtrack) return kFALSE; |
6308b375 | 395 | |
396 | // | |
397 | // Howmany secondaries have been produced ? | |
398 | Int_t nNew = fNtrack - fHgwmk - 1; | |
a1d92a3f | 399 | |
6308b375 | 400 | if (nNew > 0) { |
401 | Int_t i, j; | |
6308b375 | 402 | TArrayI map1(nNew); |
403 | // | |
404 | // Copy pointers to temporary array | |
405 | TParticle** tmp = new TParticle*[nNew]; | |
406 | ||
407 | for (i = 0; i < nNew; i++) { | |
d94af0c1 | 408 | if (fParticleMap.At(fHgwmk + 1 + i)) { |
d58b4b69 | 409 | tmp[i] = GetParticleMapEntry(fHgwmk + 1 + i); |
6308b375 | 410 | } else { |
411 | tmp[i] = 0x0; | |
412 | } | |
413 | map1[i] = -99; | |
414 | } | |
415 | ||
416 | ||
417 | // | |
418 | // Reset LoadPoint | |
419 | // | |
1166db55 | 420 | Int_t loadPoint = fHgwmk + 1; |
6308b375 | 421 | // |
422 | // Re-Push particles into stack | |
423 | // The outer loop is over parents, the inner over children. | |
424 | // -1 refers to the primary particle | |
425 | // | |
a1d92a3f | 426 | for (i = -1; i < nNew-1; i++) { |
6308b375 | 427 | Int_t ipa; |
428 | TParticle* parP; | |
429 | if (i == -1) { | |
430 | ipa = tmp[0]->GetFirstMother(); | |
d58b4b69 | 431 | parP = GetParticleMapEntry(ipa); |
6308b375 | 432 | } else { |
433 | ipa = (fHgwmk + 1 + i); | |
434 | // Skip deleted particles | |
435 | if (!tmp[i]) continue; | |
436 | // Skip particles without children | |
437 | if (tmp[i]->GetFirstDaughter() == -1) continue; | |
438 | parP = tmp[i]; | |
439 | } | |
440 | // Reset daughter information | |
a1d92a3f | 441 | |
442 | Int_t idaumin = parP->GetFirstDaughter() - fHgwmk - 1; | |
443 | Int_t idaumax = parP->GetLastDaughter() - fHgwmk - 1; | |
6308b375 | 444 | parP->SetFirstDaughter(-1); |
445 | parP->SetLastDaughter(-1); | |
a1d92a3f | 446 | for (j = idaumin; j <= idaumax; j++) { |
6308b375 | 447 | // Skip deleted particles |
448 | if (!tmp[j]) continue; | |
449 | // Skip particles already handled | |
450 | if (map1[j] != -99) continue; | |
451 | Int_t jpa = tmp[j]->GetFirstMother(); | |
452 | // Check if daughter of current parent | |
453 | if (jpa == ipa) { | |
d94af0c1 | 454 | fParticleMap[loadPoint] = tmp[j]; |
6308b375 | 455 | // Re-establish daughter information |
1166db55 | 456 | parP->SetLastDaughter(loadPoint); |
457 | if (parP->GetFirstDaughter() == -1) parP->SetFirstDaughter(loadPoint); | |
6308b375 | 458 | // Set Mother information |
459 | if (i != -1) { | |
460 | tmp[j]->SetFirstMother(map1[i]); | |
461 | } | |
462 | // Build the map | |
1166db55 | 463 | map1[j] = loadPoint; |
6308b375 | 464 | // Increase load point |
1166db55 | 465 | loadPoint++; |
6308b375 | 466 | } |
467 | } // children | |
468 | } // parents | |
469 | ||
470 | delete[] tmp; | |
471 | ||
472 | // | |
473 | // Build map for remapping of hits | |
474 | // | |
942a9039 | 475 | fTrackLabelMap.Set(fNtrack); |
6308b375 | 476 | for (i = 0; i < fNtrack; i ++) { |
477 | if (i <= fHgwmk) { | |
942a9039 | 478 | fTrackLabelMap[i] = i; |
6308b375 | 479 | } else{ |
942a9039 | 480 | fTrackLabelMap[i] = map1[i - fHgwmk -1]; |
6308b375 | 481 | } |
482 | } | |
6308b375 | 483 | } // new particles poduced |
77db8cbf | 484 | |
485 | return kTRUE; | |
9e1a0ddb | 486 | } |
487 | ||
3e2e3ece | 488 | Bool_t AliStack::KeepPhysics(const TParticle* part) |
e44c5340 | 489 | { |
490 | // | |
491 | // Some particles have to kept on the stack for reasons motivated | |
492 | // by physics analysis. Decision is put here. | |
493 | // | |
494 | Bool_t keep = kFALSE; | |
3f5add1a | 495 | |
496 | Int_t parent = part->GetFirstMother(); | |
497 | if (parent >= 0 && parent <= fHgwmk) { | |
498 | TParticle* father = GetParticleMapEntry(parent); | |
e44c5340 | 499 | // |
500 | // Keep first-generation daughter from primaries with heavy flavor | |
501 | // | |
e44c5340 | 502 | Int_t kf = father->GetPdgCode(); |
503 | kf = TMath::Abs(kf); | |
504 | Int_t kfl = kf; | |
505 | // meson ? | |
506 | if (kfl > 10) kfl/=100; | |
507 | // baryon | |
3f5add1a | 508 | if (kfl > 10) kfl/=10; |
509 | if (kfl > 10) kfl/=10; | |
e44c5340 | 510 | if (kfl >= 4) { |
511 | keep = kTRUE; | |
512 | } | |
3f5add1a | 513 | // |
514 | // e+e- from pair production of primary gammas | |
515 | // | |
516 | if ((part->GetUniqueID()) == kPPair) keep = kTRUE; | |
e44c5340 | 517 | } |
518 | return keep; | |
519 | } | |
520 | ||
9e1a0ddb | 521 | //_____________________________________________________________________________ |
522 | void AliStack::FinishEvent() | |
523 | { | |
88cb7938 | 524 | // |
525 | // Write out the kinematics that was not yet filled | |
526 | // | |
9e1a0ddb | 527 | |
88cb7938 | 528 | // Update event header |
9e1a0ddb | 529 | |
88cb7938 | 530 | if (!TreeK()) { |
9e1a0ddb | 531 | // Fatal("FinishEvent", "No kinematics tree is defined."); |
532 | // Don't panic this is a probably a lego run | |
533 | return; | |
9e1a0ddb | 534 | } |
535 | ||
536 | CleanParents(); | |
942a9039 | 537 | if(TreeK()->GetEntries() ==0) { |
9e1a0ddb | 538 | // set the fParticleFileMap size for the first time |
539 | fParticleFileMap.Set(fHgwmk+1); | |
540 | } | |
541 | ||
542 | Bool_t allFilled = kFALSE; | |
d58b4b69 | 543 | TParticle *part; |
544 | for(Int_t i=0; i<fHgwmk+1; ++i) { | |
545 | if((part=GetParticleMapEntry(i))) { | |
546 | fParticleBuffer = part; | |
88cb7938 | 547 | fParticleFileMap[i]= static_cast<Int_t>(TreeK()->GetEntries()); |
548 | TreeK()->Fill(); | |
da2af24c | 549 | fParticleBuffer=0; |
d94af0c1 | 550 | fParticleMap.AddAt(0,i); |
9e1a0ddb | 551 | |
552 | // When all primaries were filled no particle!=0 | |
553 | // should be left => to be removed later. | |
21bf7095 | 554 | if (allFilled) AliWarning(Form("Why != 0 part # %d?\n",i)); |
9e1a0ddb | 555 | } |
88cb7938 | 556 | else |
d58b4b69 | 557 | { |
9e1a0ddb | 558 | // // printf("Why = 0 part # %d?\n",i); => We know. |
559 | // break; | |
88cb7938 | 560 | // we don't break now in order to be sure there is no |
561 | // particle !=0 left. | |
562 | // To be removed later and replaced with break. | |
563 | if(!allFilled) allFilled = kTRUE; | |
d58b4b69 | 564 | } |
565 | } | |
9e1a0ddb | 566 | } |
9e1a0ddb | 567 | //_____________________________________________________________________________ |
88cb7938 | 568 | |
9e1a0ddb | 569 | void AliStack::FlagTrack(Int_t track) |
570 | { | |
571 | // | |
572 | // Flags a track and all its family tree to be kept | |
573 | // | |
574 | ||
575 | TParticle *particle; | |
576 | ||
577 | Int_t curr=track; | |
578 | while(1) { | |
d58b4b69 | 579 | particle = GetParticleMapEntry(curr); |
9e1a0ddb | 580 | |
581 | // If the particle is flagged the three from here upward is saved already | |
582 | if(particle->TestBit(kKeepBit)) return; | |
583 | ||
584 | // Save this particle | |
585 | particle->SetBit(kKeepBit); | |
586 | ||
587 | // Move to father if any | |
588 | if((curr=particle->GetFirstMother())==-1) return; | |
589 | } | |
590 | } | |
591 | ||
592 | //_____________________________________________________________________________ | |
ed54bf31 | 593 | void AliStack::KeepTrack(Int_t track) |
9e1a0ddb | 594 | { |
595 | // | |
596 | // Flags a track to be kept | |
597 | // | |
598 | ||
d94af0c1 | 599 | fParticleMap.At(track)->SetBit(kKeepBit); |
9e1a0ddb | 600 | } |
601 | ||
602 | //_____________________________________________________________________________ | |
ae96e41f | 603 | void AliStack::Clean(Int_t size) |
9e1a0ddb | 604 | { |
605 | // | |
ae96e41f | 606 | // Reset stack data except for fTreeK |
9e1a0ddb | 607 | // |
88cb7938 | 608 | |
9e1a0ddb | 609 | fNtrack=0; |
610 | fNprimary=0; | |
611 | fHgwmk=0; | |
612 | fLoadPoint=0; | |
613 | fCurrent = -1; | |
614 | ResetArrays(size); | |
615 | } | |
616 | ||
ae96e41f | 617 | //_____________________________________________________________________________ |
618 | void AliStack::Reset(Int_t size) | |
619 | { | |
620 | // | |
621 | // Reset stack data including fTreeK | |
622 | // | |
623 | ||
624 | Clean(size); | |
c38db470 | 625 | delete fParticleBuffer; fParticleBuffer = 0; |
ae96e41f | 626 | fTreeK = 0x0; |
627 | } | |
628 | ||
9e1a0ddb | 629 | //_____________________________________________________________________________ |
630 | void AliStack::ResetArrays(Int_t size) | |
631 | { | |
632 | // | |
633 | // Resets stack arrays | |
634 | // | |
d94af0c1 | 635 | fParticles.Clear(); |
636 | fParticleMap.Clear(); | |
637 | if (size>0) fParticleMap.Expand(size); | |
9e1a0ddb | 638 | } |
639 | ||
640 | //_____________________________________________________________________________ | |
e2afb3b6 | 641 | void AliStack::SetHighWaterMark(Int_t) |
9e1a0ddb | 642 | { |
643 | // | |
644 | // Set high water mark for last track in event | |
645 | // | |
6308b375 | 646 | |
942a9039 | 647 | fHgwmk = fNtrack-1; |
648 | fCurrentPrimary=fHgwmk; | |
649 | // Set also number of primary tracks | |
650 | fNprimary = fHgwmk+1; | |
9e1a0ddb | 651 | } |
652 | ||
653 | //_____________________________________________________________________________ | |
654 | TParticle* AliStack::Particle(Int_t i) | |
655 | { | |
656 | // | |
657 | // Return particle with specified ID | |
942a9039 | 658 | |
d94af0c1 | 659 | if(!fParticleMap.At(i)) { |
660 | Int_t nentries = fParticles.GetEntriesFast(); | |
9e1a0ddb | 661 | // algorithmic way of getting entry index |
662 | // (primary particles are filled after secondaries) | |
e94530da | 663 | Int_t entry = TreeKEntry(i); |
9e1a0ddb | 664 | // check whether algorithmic way and |
665 | // and the fParticleFileMap[i] give the same; | |
666 | // give the fatal error if not | |
667 | if (entry != fParticleFileMap[i]) { | |
21bf7095 | 668 | AliFatal(Form( |
9e1a0ddb | 669 | "!! The algorithmic way and map are different: !!\n entry: %d map: %d", |
21bf7095 | 670 | entry, fParticleFileMap[i])); |
9e1a0ddb | 671 | } |
942a9039 | 672 | // Load particle at entry into fParticleBuffer |
88cb7938 | 673 | TreeK()->GetEntry(entry); |
942a9039 | 674 | // Add to the TClonesarray |
d94af0c1 | 675 | new (fParticles[nentries]) TParticle(*fParticleBuffer); |
942a9039 | 676 | // Store a pointer in the TObjArray |
d94af0c1 | 677 | fParticleMap.AddAt(fParticles[nentries],i); |
9e1a0ddb | 678 | } |
d58b4b69 | 679 | return GetParticleMapEntry(i); |
9e1a0ddb | 680 | } |
681 | ||
e94530da | 682 | //_____________________________________________________________________________ |
683 | TParticle* AliStack::ParticleFromTreeK(Int_t id) const | |
684 | { | |
685 | // | |
686 | // return pointer to TParticle with label id | |
687 | // | |
688 | Int_t entry; | |
689 | if ((entry = TreeKEntry(id)) < 0) return 0; | |
690 | if (fTreeK->GetEntry(entry)<=0) return 0; | |
691 | return fParticleBuffer; | |
692 | } | |
693 | ||
694 | //_____________________________________________________________________________ | |
695 | Int_t AliStack::TreeKEntry(Int_t id) const | |
696 | { | |
697 | // | |
942a9039 | 698 | // Return entry number in the TreeK for particle with label id |
699 | // Return negative number if label>fNtrack | |
700 | // | |
701 | // The order of particles in TreeK reflects the order of the transport of primaries and production of secondaries: | |
e94530da | 702 | // |
942a9039 | 703 | // Before transport there are fNprimary particles on the stack. |
704 | // They are transported one by one and secondaries (fNtrack - fNprimary) are produced. | |
705 | // After the transport of each particles secondaries are written to the TreeK | |
706 | // They occupy the entries 0 ... fNtrack - fNprimary - 1 | |
707 | // The primaries are written after they have been transported and occupy | |
708 | // fNtrack - fNprimary .. fNtrack - 1 | |
709 | ||
e94530da | 710 | Int_t entry; |
711 | if (id<fNprimary) | |
712 | entry = id+fNtrack-fNprimary; | |
713 | else | |
714 | entry = id-fNprimary; | |
715 | return entry; | |
716 | } | |
717 | ||
5d8718b8 | 718 | //_____________________________________________________________________________ |
642f15cf | 719 | Int_t AliStack::GetCurrentParentTrackNumber() const |
5d8718b8 | 720 | { |
721 | // | |
722 | // Return number of the parent of the current track | |
723 | // | |
724 | ||
d58b4b69 | 725 | TParticle* current = GetParticleMapEntry(fCurrent); |
5d8718b8 | 726 | |
727 | if (current) | |
728 | return current->GetFirstMother(); | |
729 | else { | |
21bf7095 | 730 | AliWarning("Current track not found in the stack"); |
5d8718b8 | 731 | return -1; |
732 | } | |
733 | } | |
734 | ||
9e1a0ddb | 735 | //_____________________________________________________________________________ |
f5f55563 | 736 | Int_t AliStack::GetPrimary(Int_t id) |
9e1a0ddb | 737 | { |
738 | // | |
739 | // Return number of primary that has generated track | |
740 | // | |
741 | ||
742 | int current, parent; | |
9e1a0ddb | 743 | // |
744 | parent=id; | |
745 | while (1) { | |
746 | current=parent; | |
f5f55563 | 747 | parent=Particle(current)->GetFirstMother(); |
9e1a0ddb | 748 | if(parent<0) return current; |
749 | } | |
750 | } | |
751 | ||
752 | //_____________________________________________________________________________ | |
753 | void AliStack::DumpPart (Int_t i) const | |
754 | { | |
755 | // | |
756 | // Dumps particle i in the stack | |
757 | // | |
d58b4b69 | 758 | GetParticleMapEntry(i)->Print(); |
9e1a0ddb | 759 | } |
760 | ||
761 | //_____________________________________________________________________________ | |
762 | void AliStack::DumpPStack () | |
763 | { | |
764 | // | |
765 | // Dumps the particle stack | |
766 | // | |
767 | ||
3ab6f951 | 768 | Int_t i; |
769 | ||
88cb7938 | 770 | printf("\n\n=======================================================================\n"); |
3ab6f951 | 771 | for (i=0;i<fNtrack;i++) |
9e1a0ddb | 772 | { |
773 | TParticle* particle = Particle(i); | |
774 | if (particle) { | |
775 | printf("-> %d ",i); particle->Print(); | |
776 | printf("--------------------------------------------------------------\n"); | |
777 | } | |
778 | else | |
779 | Warning("DumpPStack", "No particle with id %d.", i); | |
780 | } | |
781 | ||
88cb7938 | 782 | printf("\n=======================================================================\n\n"); |
9e1a0ddb | 783 | |
784 | // print particle file map | |
9b4aee57 | 785 | // printf("\nParticle file map: \n"); |
786 | // for (i=0; i<fNtrack; i++) | |
787 | // printf(" %d th entry: %d \n",i,fParticleFileMap[i]); | |
9e1a0ddb | 788 | } |
789 | ||
790 | ||
791 | //_____________________________________________________________________________ | |
792 | void AliStack::DumpLoadedStack() const | |
793 | { | |
794 | // | |
795 | // Dumps the particle in the stack | |
796 | // that are loaded in memory. | |
797 | // | |
798 | ||
9e1a0ddb | 799 | printf( |
800 | "\n\n=======================================================================\n"); | |
801 | for (Int_t i=0;i<fNtrack;i++) | |
802 | { | |
d58b4b69 | 803 | TParticle* particle = GetParticleMapEntry(i); |
9e1a0ddb | 804 | if (particle) { |
805 | printf("-> %d ",i); particle->Print(); | |
806 | printf("--------------------------------------------------------------\n"); | |
807 | } | |
808 | else { | |
809 | printf("-> %d Particle not loaded.\n",i); | |
810 | printf("--------------------------------------------------------------\n"); | |
811 | } | |
812 | } | |
813 | printf( | |
814 | "\n=======================================================================\n\n"); | |
815 | } | |
816 | ||
dde0a601 | 817 | //_____________________________________________________________________________ |
818 | void AliStack::SetCurrentTrack(Int_t track) | |
819 | { | |
820 | fCurrent = track; | |
821 | if (fCurrent < fNprimary) fCurrentTrack = Particle(track); | |
822 | } | |
823 | ||
824 | ||
825 | //_____________________________________________________________________________ | |
9e1a0ddb | 826 | // |
827 | // protected methods | |
828 | // | |
829 | ||
830 | //_____________________________________________________________________________ | |
831 | void AliStack::CleanParents() | |
832 | { | |
833 | // | |
834 | // Clean particles stack | |
835 | // Set parent/daughter relations | |
836 | // | |
837 | ||
9e1a0ddb | 838 | TParticle *part; |
839 | int i; | |
840 | for(i=0; i<fHgwmk+1; i++) { | |
d58b4b69 | 841 | part = GetParticleMapEntry(i); |
9e1a0ddb | 842 | if(part) if(!part->TestBit(kDaughtersBit)) { |
843 | part->SetFirstDaughter(-1); | |
844 | part->SetLastDaughter(-1); | |
845 | } | |
846 | } | |
847 | } | |
848 | ||
849 | //_____________________________________________________________________________ | |
850 | TParticle* AliStack::GetNextParticle() | |
851 | { | |
852 | // | |
853 | // Return next particle from stack of particles | |
854 | // | |
855 | ||
856 | TParticle* particle = 0; | |
857 | ||
858 | // search secondaries | |
859 | //for(Int_t i=fNtrack-1; i>=0; i--) { | |
860 | for(Int_t i=fNtrack-1; i>fHgwmk; i--) { | |
d58b4b69 | 861 | particle = GetParticleMapEntry(i); |
9e1a0ddb | 862 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
863 | fCurrent=i; | |
9e1a0ddb | 864 | return particle; |
865 | } | |
866 | } | |
867 | ||
868 | // take next primary if all secondaries were done | |
869 | while (fCurrentPrimary>=0) { | |
870 | fCurrent = fCurrentPrimary; | |
d58b4b69 | 871 | particle = GetParticleMapEntry(fCurrentPrimary--); |
9e1a0ddb | 872 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
9e1a0ddb | 873 | return particle; |
874 | } | |
875 | } | |
876 | ||
877 | // nothing to be tracked | |
878 | fCurrent = -1; | |
6308b375 | 879 | |
880 | ||
9e1a0ddb | 881 | return particle; |
882 | } | |
88cb7938 | 883 | //__________________________________________________________________________________________ |
9e1a0ddb | 884 | |
942a9039 | 885 | void AliStack::ConnectTree(TTree* tree) |
9e1a0ddb | 886 | { |
887 | // | |
88cb7938 | 888 | // Creates branch for writing particles |
889 | // | |
ae96e41f | 890 | |
942a9039 | 891 | fTreeK = tree; |
892 | ||
21bf7095 | 893 | AliDebug(1, "Connecting TreeK"); |
88cb7938 | 894 | if (fTreeK == 0x0) |
895 | { | |
896 | if (TreeK() == 0x0) | |
897 | { | |
21bf7095 | 898 | AliFatal("Parameter is NULL");//we don't like such a jokes |
88cb7938 | 899 | return; |
900 | } | |
901 | return;//in this case TreeK() calls back this method (ConnectTree) | |
902 | //tree after setting fTreeK, the rest was already executed | |
903 | //it is safe to return now | |
904 | } | |
905 | ||
906 | // Create a branch for particles | |
907 | ||
21bf7095 | 908 | AliDebug(2, Form("Tree name is %s",fTreeK->GetName())); |
88cb7938 | 909 | |
910 | if (fTreeK->GetDirectory()) | |
911 | { | |
21bf7095 | 912 | AliDebug(2, Form("and dir is %s",fTreeK->GetDirectory()->GetName())); |
88cb7938 | 913 | } |
914 | else | |
21bf7095 | 915 | AliWarning("DIR IS NOT SET !!!"); |
88cb7938 | 916 | |
942a9039 | 917 | TBranch *branch=fTreeK->GetBranch("Particles"); |
88cb7938 | 918 | if(branch == 0x0) |
919 | { | |
fda9d714 | 920 | branch = fTreeK->Branch("Particles", &fParticleBuffer, 4000); |
21bf7095 | 921 | AliDebug(2, "Creating Branch in Tree"); |
88cb7938 | 922 | } |
923 | else | |
924 | { | |
21bf7095 | 925 | AliDebug(2, "Branch Found in Tree"); |
88cb7938 | 926 | branch->SetAddress(&fParticleBuffer); |
927 | } | |
928 | if (branch->GetDirectory()) | |
929 | { | |
21bf7095 | 930 | AliDebug(1, Form("Branch Dir Name is %s",branch->GetDirectory()->GetName())); |
88cb7938 | 931 | } |
932 | else | |
21bf7095 | 933 | AliWarning("Branch Dir is NOT SET"); |
9e1a0ddb | 934 | } |
88cb7938 | 935 | |
5d8718b8 | 936 | //_____________________________________________________________________________ |
88cb7938 | 937 | |
938 | Bool_t AliStack::GetEvent() | |
9e1a0ddb | 939 | { |
940 | // | |
941 | // Get new event from TreeK | |
ccf7a81f | 942 | |
9e1a0ddb | 943 | // Reset/Create the particle stack |
88cb7938 | 944 | Int_t size = (Int_t)TreeK()->GetEntries(); |
9e1a0ddb | 945 | ResetArrays(size); |
ccf7a81f | 946 | return kTRUE; |
9e1a0ddb | 947 | } |
88cb7938 | 948 | //_____________________________________________________________________________ |
949 | ||
1fed0e8b | 950 | Bool_t AliStack::IsStable(Int_t pdg) const |
951 | { | |
f3069e25 | 952 | // |
953 | // Decide whether particle (pdg) is stable | |
954 | // | |
955 | ||
956 | ||
957 | // All ions/nucleons are considered as stable | |
958 | // Nuclear code is 10LZZZAAAI | |
959 | if(pdg>1000000000)return kTRUE; | |
1fed0e8b | 960 | |
06f923c8 | 961 | const Int_t kNstable = 18; |
f3069e25 | 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 | |
18a545dc | 970 | kK0Short, // K0s |
971 | kK0Long, // K0l | |
f3069e25 | 972 | kProton, // Proton |
973 | kNeutron, // Neutron | |
974 | kLambda0, // Lambda_0 | |
975 | kSigmaMinus, // Sigma Minus | |
f3069e25 | 976 | kSigmaPlus, // Sigma Plus |
977 | 3312, // Xsi Minus | |
978 | 3322, // Xsi | |
979 | 3334, // Omega | |
06f923c8 | 980 | kNuE, // Electron Neutrino |
981 | kNuMu, // Muon Neutrino | |
982 | kNuTau // Tau Neutrino | |
f3069e25 | 983 | }; |
1fed0e8b | 984 | |
f3069e25 | 985 | Bool_t isStable = kFALSE; |
986 | for (i = 0; i < kNstable; i++) { | |
987 | if (pdg == TMath::Abs(pdgStable[i])) { | |
988 | isStable = kTRUE; | |
989 | break; | |
1fed0e8b | 990 | } |
f3069e25 | 991 | } |
992 | ||
993 | return isStable; | |
1fed0e8b | 994 | } |
995 | ||
dde0a601 | 996 | //_____________________________________________________________________________ |
1fed0e8b | 997 | Bool_t AliStack::IsPhysicalPrimary(Int_t index) |
998 | { | |
999 | // | |
1000 | // Test if a particle is a physical primary according to the following definition: | |
1001 | // Particles produced in the collision including products of strong and | |
1002 | // electromagnetic decay and excluding feed-down from weak decays of strange | |
1003 | // particles. | |
1004 | // | |
1005 | TParticle* p = Particle(index); | |
1006 | Int_t ist = p->GetStatusCode(); | |
1007 | ||
1008 | // | |
1009 | // Initial state particle | |
15013b36 | 1010 | if (ist > 1) return kFALSE; |
1fed0e8b | 1011 | |
1012 | Int_t pdg = TMath::Abs(p->GetPdgCode()); | |
1013 | ||
1014 | if (!IsStable(pdg)) return kFALSE; | |
1015 | ||
1016 | if (index < GetNprimary()) { | |
1017 | // | |
1018 | // Particle produced by generator | |
1019 | return kTRUE; | |
1020 | } else { | |
1021 | // | |
1022 | // Particle produced during transport | |
1023 | // | |
1b13a70f | 1024 | |
1fed0e8b | 1025 | Int_t imo = p->GetFirstMother(); |
1026 | TParticle* pm = Particle(imo); | |
1027 | Int_t mpdg = TMath::Abs(pm->GetPdgCode()); | |
1b13a70f | 1028 | // Check if it comes from a pi0 decay |
1029 | // | |
1030 | // What about the pi0 Dalitz ?? | |
1031 | // if ((mpdg == kPi0) && (imo < GetNprimary())) return kTRUE; | |
1032 | ||
1033 | // Check if this is a heavy flavor decay product | |
1fed0e8b | 1034 | Int_t mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); |
1035 | // | |
1036 | // Light hadron | |
1037 | if (mfl < 4) return kFALSE; | |
1038 | ||
1039 | // | |
1040 | // Heavy flavor hadron produced by generator | |
1041 | if (imo < GetNprimary()) { | |
1042 | return kTRUE; | |
1043 | } | |
1044 | ||
1045 | // To be sure that heavy flavor has not been produced in a secondary interaction | |
1046 | // Loop back to the generated mother | |
1047 | while (imo >= GetNprimary()) { | |
1b13a70f | 1048 | imo = pm->GetFirstMother(); |
1fed0e8b | 1049 | pm = Particle(imo); |
1050 | } | |
1051 | mpdg = TMath::Abs(pm->GetPdgCode()); | |
1052 | mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); | |
1053 | ||
1054 | if (mfl < 4) { | |
1055 | return kFALSE; | |
1056 | } else { | |
1057 | return kTRUE; | |
1058 | } | |
1059 | } // produced by generator ? | |
1060 | } |