]>
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> |
c180f65d | 34 | #include <TDatabasePDG.h> |
9e1a0ddb | 35 | #include <TTree.h> |
942a9039 | 36 | #include <TDirectory.h> |
9e1a0ddb | 37 | |
21bf7095 | 38 | #include "AliLog.h" |
88cb7938 | 39 | #include "AliStack.h" |
9e1a0ddb | 40 | |
41 | ClassImp(AliStack) | |
42 | ||
e2afb3b6 | 43 | //_______________________________________________________________________ |
44 | AliStack::AliStack(): | |
304b9ce3 | 45 | fParticles("TParticle", 1000), |
d94af0c1 | 46 | fParticleMap(), |
e2afb3b6 | 47 | fParticleFileMap(0), |
48 | fParticleBuffer(0), | |
90e48c0c | 49 | fCurrentTrack(0), |
e2afb3b6 | 50 | fTreeK(0), |
51 | fNtrack(0), | |
52 | fNprimary(0), | |
53 | fCurrent(-1), | |
54 | fCurrentPrimary(-1), | |
55 | fHgwmk(0), | |
88cb7938 | 56 | fLoadPoint(0), |
942a9039 | 57 | fTrackLabelMap(0) |
9e1a0ddb | 58 | { |
59 | // | |
e2afb3b6 | 60 | // Default constructor |
9e1a0ddb | 61 | // |
9e1a0ddb | 62 | } |
63 | ||
e2afb3b6 | 64 | //_______________________________________________________________________ |
942a9039 | 65 | AliStack::AliStack(Int_t size, const char* /*evfoldname*/): |
d94af0c1 | 66 | fParticles("TParticle",1000), |
67 | fParticleMap(size), | |
e2afb3b6 | 68 | fParticleFileMap(0), |
69 | fParticleBuffer(0), | |
90e48c0c | 70 | fCurrentTrack(0), |
e2afb3b6 | 71 | fTreeK(0), |
72 | fNtrack(0), | |
73 | fNprimary(0), | |
74 | fCurrent(-1), | |
75 | fCurrentPrimary(-1), | |
76 | fHgwmk(0), | |
88cb7938 | 77 | fLoadPoint(0), |
942a9039 | 78 | fTrackLabelMap(0) |
e2afb3b6 | 79 | { |
80 | // | |
81 | // Constructor | |
82 | // | |
83 | } | |
9e1a0ddb | 84 | |
e2afb3b6 | 85 | //_______________________________________________________________________ |
86 | AliStack::AliStack(const AliStack& st): | |
9938d01c | 87 | TVirtualMCStack(st), |
d94af0c1 | 88 | fParticles("TParticle",1000), |
89 | fParticleMap(*(st.Particles())), | |
9938d01c | 90 | fParticleFileMap(st.fParticleFileMap), |
91 | fParticleBuffer(0), | |
92 | fCurrentTrack(0), | |
93 | fTreeK((TTree*)(st.fTreeK->Clone())), | |
94 | fNtrack(st.GetNtrack()), | |
95 | fNprimary(st.GetNprimary()), | |
96 | fCurrent(-1), | |
97 | fCurrentPrimary(-1), | |
98 | fHgwmk(0), | |
99 | fLoadPoint(0), | |
942a9039 | 100 | fTrackLabelMap(0) |
9e1a0ddb | 101 | { |
9938d01c | 102 | // Copy constructor |
9e1a0ddb | 103 | } |
104 | ||
9938d01c | 105 | |
e2afb3b6 | 106 | //_______________________________________________________________________ |
6c4904c2 | 107 | void AliStack::Copy(TObject&) const |
e2afb3b6 | 108 | { |
21bf7095 | 109 | AliFatal("Not implemented!"); |
e2afb3b6 | 110 | } |
9e1a0ddb | 111 | |
e2afb3b6 | 112 | //_______________________________________________________________________ |
9e1a0ddb | 113 | AliStack::~AliStack() |
114 | { | |
115 | // | |
116 | // Destructor | |
117 | // | |
118 | ||
d94af0c1 | 119 | fParticles.Clear(); |
9e1a0ddb | 120 | } |
121 | ||
122 | // | |
123 | // public methods | |
124 | // | |
125 | ||
126 | //_____________________________________________________________________________ | |
3e2e3ece | 127 | void AliStack::PushTrack(Int_t done, Int_t parent, Int_t pdg, const Float_t *pmom, |
128 | const Float_t *vpos, const Float_t *polar, Float_t tof, | |
88cb7938 | 129 | TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) |
9e1a0ddb | 130 | { |
131 | // | |
132 | // Load a track on the stack | |
133 | // | |
b4bb4536 | 134 | // done 1 if the track has to be transported |
135 | // 0 if not | |
9e1a0ddb | 136 | // parent identifier of the parent track. -1 for a primary |
137 | // pdg particle code | |
138 | // pmom momentum GeV/c | |
139 | // vpos position | |
140 | // polar polarisation | |
141 | // tof time of flight in seconds | |
142 | // mecha production mechanism | |
143 | // ntr on output the number of the track stored | |
144 | // | |
145 | ||
9e1a0ddb | 146 | // const Float_t tlife=0; |
147 | ||
148 | // | |
149 | // Here we get the static mass | |
150 | // For MC is ok, but a more sophisticated method could be necessary | |
151 | // if the calculated mass is required | |
152 | // also, this method is potentially dangerous if the mass | |
153 | // used in the MC is not the same of the PDG database | |
154 | // | |
fe046ade | 155 | TParticlePDG* pmc = TDatabasePDG::Instance()->GetParticle(pdg); |
156 | if (pmc) { | |
157 | Float_t mass = TDatabasePDG::Instance()->GetParticle(pdg)->Mass(); | |
158 | Float_t e=TMath::Sqrt(mass*mass+pmom[0]*pmom[0]+ | |
159 | pmom[1]*pmom[1]+pmom[2]*pmom[2]); | |
160 | ||
ccf7a81f | 161 | // 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", |
162 | // mass,e,fNtrack,pdg,parent,done,vpos[0],vpos[1],vpos[2],pmom[0],pmom[1],pmom[2],kS); | |
163 | ||
9e1a0ddb | 164 | |
642f15cf | 165 | PushTrack(done, parent, pdg, pmom[0], pmom[1], pmom[2], e, |
fe046ade | 166 | vpos[0], vpos[1], vpos[2], tof, polar[0], polar[1], polar[2], |
167 | mech, ntr, weight, is); | |
168 | } else { | |
21bf7095 | 169 | AliWarning(Form("Particle type %d not defined in PDG Database !", pdg)); |
170 | AliWarning("Particle skipped !"); | |
fe046ade | 171 | } |
9e1a0ddb | 172 | } |
173 | ||
174 | //_____________________________________________________________________________ | |
642f15cf | 175 | void AliStack::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
9e1a0ddb | 176 | Double_t px, Double_t py, Double_t pz, Double_t e, |
177 | Double_t vx, Double_t vy, Double_t vz, Double_t tof, | |
178 | Double_t polx, Double_t poly, Double_t polz, | |
98490ea9 | 179 | TMCProcess mech, Int_t &ntr, Double_t weight, Int_t is) |
9e1a0ddb | 180 | { |
181 | // | |
182 | // Load a track on the stack | |
183 | // | |
b4bb4536 | 184 | // done 1 if the track has to be transported |
185 | // 0 if not | |
9e1a0ddb | 186 | // parent identifier of the parent track. -1 for a primary |
187 | // pdg particle code | |
188 | // kS generation status code | |
189 | // px, py, pz momentum GeV/c | |
190 | // vx, vy, vz position | |
191 | // polar polarisation | |
192 | // tof time of flight in seconds | |
193 | // mech production mechanism | |
194 | // ntr on output the number of the track stored | |
195 | // | |
196 | // New method interface: | |
197 | // arguments were changed to be in correspondence with TParticle | |
198 | // constructor. | |
199 | // Note: the energy is not calculated from the static mass but | |
200 | // it is passed by argument e. | |
201 | ||
9e1a0ddb | 202 | const Int_t kFirstDaughter=-1; |
203 | const Int_t kLastDaughter=-1; | |
6308b375 | 204 | |
205 | ||
9e1a0ddb | 206 | TParticle* particle |
d94af0c1 | 207 | = new(fParticles[fLoadPoint++]) |
47c8bcbe | 208 | TParticle(pdg, is, parent, -1, kFirstDaughter, kLastDaughter, |
9e1a0ddb | 209 | px, py, pz, e, vx, vy, vz, tof); |
dde0a601 | 210 | |
9e1a0ddb | 211 | particle->SetPolarisation(polx, poly, polz); |
212 | particle->SetWeight(weight); | |
213 | particle->SetUniqueID(mech); | |
214 | ||
f4414561 | 215 | |
216 | ||
217 | if(!done) { | |
218 | particle->SetBit(kDoneBit); | |
219 | } else { | |
220 | particle->SetBit(kTransportBit); | |
221 | } | |
222 | ||
223 | ||
9e1a0ddb | 224 | |
225 | // Declare that the daughter information is valid | |
226 | particle->SetBit(kDaughtersBit); | |
227 | // Add the particle to the stack | |
6308b375 | 228 | |
d94af0c1 | 229 | fParticleMap.AddAtAndExpand(particle, fNtrack);//CHECK!! |
9e1a0ddb | 230 | |
231 | if(parent>=0) { | |
d58b4b69 | 232 | particle = GetParticleMapEntry(parent); |
942a9039 | 233 | if (particle) { |
234 | particle->SetLastDaughter(fNtrack); | |
235 | if(particle->GetFirstDaughter()<0) particle->SetFirstDaughter(fNtrack); | |
236 | } | |
237 | else { | |
238 | AliError(Form("Parent %d does not exist",parent)); | |
239 | } | |
240 | } else { | |
241 | // | |
242 | // This is a primary track. Set high water mark for this event | |
243 | fHgwmk = fNtrack; | |
244 | // | |
245 | // Set also number if primary tracks | |
246 | fNprimary = fHgwmk+1; | |
247 | fCurrentPrimary++; | |
9e1a0ddb | 248 | } |
249 | ntr = fNtrack++; | |
250 | } | |
251 | ||
252 | //_____________________________________________________________________________ | |
642f15cf | 253 | TParticle* AliStack::PopNextTrack(Int_t& itrack) |
b9d0a01d | 254 | { |
255 | // | |
256 | // Returns next track from stack of particles | |
257 | // | |
258 | ||
259 | ||
260 | TParticle* track = GetNextParticle(); | |
261 | ||
262 | if (track) { | |
263 | itrack = fCurrent; | |
264 | track->SetBit(kDoneBit); | |
265 | } | |
fe046ade | 266 | else |
b9d0a01d | 267 | itrack = -1; |
fe046ade | 268 | |
269 | fCurrentTrack = track; | |
b9d0a01d | 270 | return track; |
271 | } | |
272 | ||
b9d0a01d | 273 | //_____________________________________________________________________________ |
642f15cf | 274 | TParticle* AliStack::PopPrimaryForTracking(Int_t i) |
b9d0a01d | 275 | { |
276 | // | |
277 | // Returns i-th primary particle if it is flagged to be tracked, | |
278 | // 0 otherwise | |
279 | // | |
280 | ||
281 | TParticle* particle = Particle(i); | |
282 | ||
dde0a601 | 283 | if (!particle->TestBit(kDoneBit)) { |
284 | fCurrentTrack = particle; | |
b9d0a01d | 285 | return particle; |
dde0a601 | 286 | } |
b9d0a01d | 287 | else |
288 | return 0; | |
289 | } | |
290 | ||
9e1a0ddb | 291 | //_____________________________________________________________________________ |
77db8cbf | 292 | Bool_t AliStack::PurifyKine() |
9e1a0ddb | 293 | { |
294 | // | |
295 | // Compress kinematic tree keeping only flagged particles | |
296 | // and renaming the particle id's in all the hits | |
297 | // | |
298 | ||
77db8cbf | 299 | int nkeep = fHgwmk + 1, parent, i; |
9e1a0ddb | 300 | TParticle *part, *father; |
d94af0c1 | 301 | fTrackLabelMap.Set(fParticleMap.GetLast()+1); |
9e1a0ddb | 302 | |
303 | // Save in Header total number of tracks before compression | |
9e1a0ddb | 304 | // If no tracks generated return now |
77db8cbf | 305 | if(fHgwmk+1 == fNtrack) return kFALSE; |
9e1a0ddb | 306 | |
9e1a0ddb | 307 | // First pass, invalid Daughter information |
942a9039 | 308 | for(i=0; i<fNtrack; i++) { |
309 | // Preset map, to be removed later | |
310 | if(i<=fHgwmk) fTrackLabelMap[i]=i ; | |
311 | else { | |
312 | fTrackLabelMap[i] = -99; | |
d58b4b69 | 313 | if((part=GetParticleMapEntry(i))) { |
e44c5340 | 314 | // |
315 | // Check of this track should be kept for physics reasons | |
942a9039 | 316 | if (KeepPhysics(part)) KeepTrack(i); |
e44c5340 | 317 | // |
942a9039 | 318 | part->ResetBit(kDaughtersBit); |
319 | part->SetFirstDaughter(-1); | |
320 | part->SetLastDaughter(-1); | |
321 | } | |
76969085 | 322 | } |
9e1a0ddb | 323 | } |
324 | // Invalid daughter information for the parent of the first particle | |
325 | // generated. This may or may not be the current primary according to | |
326 | // whether decays have been recorded among the primaries | |
d58b4b69 | 327 | part = GetParticleMapEntry(fHgwmk+1); |
d94af0c1 | 328 | fParticleMap.At(part->GetFirstMother())->ResetBit(kDaughtersBit); |
9e1a0ddb | 329 | // Second pass, build map between old and new numbering |
330 | for(i=fHgwmk+1; i<fNtrack; i++) { | |
d94af0c1 | 331 | if(fParticleMap.At(i)->TestBit(kKeepBit)) { |
942a9039 | 332 | // This particle has to be kept |
333 | fTrackLabelMap[i]=nkeep; | |
334 | // If old and new are different, have to move the pointer | |
d94af0c1 | 335 | if(i!=nkeep) fParticleMap[nkeep]=fParticleMap.At(i); |
d58b4b69 | 336 | part = GetParticleMapEntry(nkeep); |
942a9039 | 337 | // as the parent is always *before*, it must be already |
338 | // in place. This is what we are checking anyway! | |
f12d42ce | 339 | if((parent=part->GetFirstMother())>fHgwmk) { |
942a9039 | 340 | if(fTrackLabelMap[parent]==-99) Fatal("PurifyKine","fTrackLabelMap[%d] = -99!\n",parent); |
f12d42ce | 341 | else part->SetFirstMother(fTrackLabelMap[parent]);} |
942a9039 | 342 | nkeep++; |
343 | } | |
9e1a0ddb | 344 | } |
345 | ||
346 | // Fix daughters information | |
347 | for (i=fHgwmk+1; i<nkeep; i++) { | |
d58b4b69 | 348 | part = GetParticleMapEntry(i); |
942a9039 | 349 | parent = part->GetFirstMother(); |
350 | if(parent>=0) { | |
d58b4b69 | 351 | father = GetParticleMapEntry(parent); |
942a9039 | 352 | if(father->TestBit(kDaughtersBit)) { |
353 | ||
354 | if(i<father->GetFirstDaughter()) father->SetFirstDaughter(i); | |
355 | if(i>father->GetLastDaughter()) father->SetLastDaughter(i); | |
356 | } else { | |
357 | // Initialise daughters info for first pass | |
358 | father->SetFirstDaughter(i); | |
359 | father->SetLastDaughter(i); | |
360 | father->SetBit(kDaughtersBit); | |
361 | } | |
9e1a0ddb | 362 | } |
9e1a0ddb | 363 | } |
942a9039 | 364 | // |
365 | // Now the output bit, from fHgwmk to nkeep we write everything and we erase | |
366 | if(nkeep > fParticleFileMap.GetSize()) fParticleFileMap.Set(Int_t (nkeep*1.5)); | |
367 | for (i=fHgwmk+1; i<nkeep; ++i) { | |
d58b4b69 | 368 | fParticleBuffer = GetParticleMapEntry(i); |
942a9039 | 369 | fParticleFileMap[i]=static_cast<Int_t>(TreeK()->GetEntries()); |
370 | TreeK()->Fill(); | |
d94af0c1 | 371 | fParticleMap[i]=fParticleBuffer=0; |
942a9039 | 372 | } |
9e1a0ddb | 373 | |
d94af0c1 | 374 | for (i = nkeep; i < fNtrack; ++i) fParticleMap[i]=0; |
6308b375 | 375 | |
942a9039 | 376 | Int_t toshrink = fNtrack-fHgwmk-1; |
377 | fLoadPoint-=toshrink; | |
2b22f272 | 378 | |
d94af0c1 | 379 | for(i=fLoadPoint; i<fLoadPoint+toshrink; ++i) fParticles.RemoveAt(i); |
942a9039 | 380 | fNtrack=nkeep; |
381 | fHgwmk=nkeep-1; | |
77db8cbf | 382 | return kTRUE; |
6308b375 | 383 | } |
384 | ||
1166db55 | 385 | |
77db8cbf | 386 | Bool_t AliStack::ReorderKine() |
6308b375 | 387 | { |
388 | // | |
389 | // In some transport code children might not come in a continuous sequence. | |
390 | // In this case the stack has to be reordered in order to establish the | |
391 | // mother daughter relation using index ranges. | |
392 | // | |
77db8cbf | 393 | if(fHgwmk+1 == fNtrack) return kFALSE; |
6308b375 | 394 | |
395 | // | |
396 | // Howmany secondaries have been produced ? | |
397 | Int_t nNew = fNtrack - fHgwmk - 1; | |
a1d92a3f | 398 | |
6308b375 | 399 | if (nNew > 0) { |
400 | Int_t i, j; | |
6308b375 | 401 | TArrayI map1(nNew); |
402 | // | |
403 | // Copy pointers to temporary array | |
404 | TParticle** tmp = new TParticle*[nNew]; | |
405 | ||
406 | for (i = 0; i < nNew; i++) { | |
d94af0c1 | 407 | if (fParticleMap.At(fHgwmk + 1 + i)) { |
d58b4b69 | 408 | tmp[i] = GetParticleMapEntry(fHgwmk + 1 + i); |
6308b375 | 409 | } else { |
410 | tmp[i] = 0x0; | |
411 | } | |
412 | map1[i] = -99; | |
413 | } | |
414 | ||
415 | ||
416 | // | |
417 | // Reset LoadPoint | |
418 | // | |
1166db55 | 419 | Int_t loadPoint = fHgwmk + 1; |
6308b375 | 420 | // |
421 | // Re-Push particles into stack | |
422 | // The outer loop is over parents, the inner over children. | |
423 | // -1 refers to the primary particle | |
424 | // | |
a1d92a3f | 425 | for (i = -1; i < nNew-1; i++) { |
6308b375 | 426 | Int_t ipa; |
427 | TParticle* parP; | |
428 | if (i == -1) { | |
429 | ipa = tmp[0]->GetFirstMother(); | |
d58b4b69 | 430 | parP = GetParticleMapEntry(ipa); |
6308b375 | 431 | } else { |
432 | ipa = (fHgwmk + 1 + i); | |
433 | // Skip deleted particles | |
434 | if (!tmp[i]) continue; | |
435 | // Skip particles without children | |
436 | if (tmp[i]->GetFirstDaughter() == -1) continue; | |
437 | parP = tmp[i]; | |
438 | } | |
439 | // Reset daughter information | |
a1d92a3f | 440 | |
441 | Int_t idaumin = parP->GetFirstDaughter() - fHgwmk - 1; | |
442 | Int_t idaumax = parP->GetLastDaughter() - fHgwmk - 1; | |
6308b375 | 443 | parP->SetFirstDaughter(-1); |
444 | parP->SetLastDaughter(-1); | |
a1d92a3f | 445 | for (j = idaumin; j <= idaumax; j++) { |
6308b375 | 446 | // Skip deleted particles |
447 | if (!tmp[j]) continue; | |
448 | // Skip particles already handled | |
449 | if (map1[j] != -99) continue; | |
450 | Int_t jpa = tmp[j]->GetFirstMother(); | |
451 | // Check if daughter of current parent | |
452 | if (jpa == ipa) { | |
d94af0c1 | 453 | fParticleMap[loadPoint] = tmp[j]; |
6308b375 | 454 | // Re-establish daughter information |
1166db55 | 455 | parP->SetLastDaughter(loadPoint); |
456 | if (parP->GetFirstDaughter() == -1) parP->SetFirstDaughter(loadPoint); | |
6308b375 | 457 | // Set Mother information |
458 | if (i != -1) { | |
459 | tmp[j]->SetFirstMother(map1[i]); | |
460 | } | |
461 | // Build the map | |
1166db55 | 462 | map1[j] = loadPoint; |
6308b375 | 463 | // Increase load point |
1166db55 | 464 | loadPoint++; |
6308b375 | 465 | } |
466 | } // children | |
467 | } // parents | |
468 | ||
469 | delete[] tmp; | |
470 | ||
471 | // | |
472 | // Build map for remapping of hits | |
473 | // | |
942a9039 | 474 | fTrackLabelMap.Set(fNtrack); |
6308b375 | 475 | for (i = 0; i < fNtrack; i ++) { |
476 | if (i <= fHgwmk) { | |
942a9039 | 477 | fTrackLabelMap[i] = i; |
6308b375 | 478 | } else{ |
942a9039 | 479 | fTrackLabelMap[i] = map1[i - fHgwmk -1]; |
6308b375 | 480 | } |
481 | } | |
6308b375 | 482 | } // new particles poduced |
77db8cbf | 483 | |
484 | return kTRUE; | |
9e1a0ddb | 485 | } |
486 | ||
3e2e3ece | 487 | Bool_t AliStack::KeepPhysics(const TParticle* part) |
e44c5340 | 488 | { |
489 | // | |
490 | // Some particles have to kept on the stack for reasons motivated | |
491 | // by physics analysis. Decision is put here. | |
492 | // | |
493 | Bool_t keep = kFALSE; | |
494 | // | |
495 | // Keep first-generation daughter from primaries with heavy flavor | |
496 | // | |
497 | Int_t parent = part->GetFirstMother(); | |
498 | if (parent >= 0 && parent <= fHgwmk) { | |
d58b4b69 | 499 | TParticle* father = GetParticleMapEntry(parent); |
e44c5340 | 500 | Int_t kf = father->GetPdgCode(); |
501 | kf = TMath::Abs(kf); | |
502 | Int_t kfl = kf; | |
503 | // meson ? | |
504 | if (kfl > 10) kfl/=100; | |
505 | // baryon | |
506 | if (kfl > 10) kfl/=10; | |
507 | if (kfl > 10) kfl/=10; | |
508 | if (kfl >= 4) { | |
509 | keep = kTRUE; | |
510 | } | |
511 | } | |
512 | return keep; | |
513 | } | |
514 | ||
9e1a0ddb | 515 | //_____________________________________________________________________________ |
516 | void AliStack::FinishEvent() | |
517 | { | |
88cb7938 | 518 | // |
519 | // Write out the kinematics that was not yet filled | |
520 | // | |
9e1a0ddb | 521 | |
88cb7938 | 522 | // Update event header |
9e1a0ddb | 523 | |
88cb7938 | 524 | if (!TreeK()) { |
9e1a0ddb | 525 | // Fatal("FinishEvent", "No kinematics tree is defined."); |
526 | // Don't panic this is a probably a lego run | |
527 | return; | |
9e1a0ddb | 528 | } |
529 | ||
530 | CleanParents(); | |
942a9039 | 531 | if(TreeK()->GetEntries() ==0) { |
9e1a0ddb | 532 | // set the fParticleFileMap size for the first time |
533 | fParticleFileMap.Set(fHgwmk+1); | |
534 | } | |
535 | ||
536 | Bool_t allFilled = kFALSE; | |
d58b4b69 | 537 | TParticle *part; |
538 | for(Int_t i=0; i<fHgwmk+1; ++i) { | |
539 | if((part=GetParticleMapEntry(i))) { | |
540 | fParticleBuffer = part; | |
88cb7938 | 541 | fParticleFileMap[i]= static_cast<Int_t>(TreeK()->GetEntries()); |
542 | TreeK()->Fill(); | |
da2af24c | 543 | fParticleBuffer=0; |
d94af0c1 | 544 | fParticleMap.AddAt(0,i); |
9e1a0ddb | 545 | |
546 | // When all primaries were filled no particle!=0 | |
547 | // should be left => to be removed later. | |
21bf7095 | 548 | if (allFilled) AliWarning(Form("Why != 0 part # %d?\n",i)); |
9e1a0ddb | 549 | } |
88cb7938 | 550 | else |
d58b4b69 | 551 | { |
9e1a0ddb | 552 | // // printf("Why = 0 part # %d?\n",i); => We know. |
553 | // break; | |
88cb7938 | 554 | // we don't break now in order to be sure there is no |
555 | // particle !=0 left. | |
556 | // To be removed later and replaced with break. | |
557 | if(!allFilled) allFilled = kTRUE; | |
d58b4b69 | 558 | } |
559 | } | |
9e1a0ddb | 560 | } |
9e1a0ddb | 561 | //_____________________________________________________________________________ |
88cb7938 | 562 | |
9e1a0ddb | 563 | void AliStack::FlagTrack(Int_t track) |
564 | { | |
565 | // | |
566 | // Flags a track and all its family tree to be kept | |
567 | // | |
568 | ||
569 | TParticle *particle; | |
570 | ||
571 | Int_t curr=track; | |
572 | while(1) { | |
d58b4b69 | 573 | particle = GetParticleMapEntry(curr); |
9e1a0ddb | 574 | |
575 | // If the particle is flagged the three from here upward is saved already | |
576 | if(particle->TestBit(kKeepBit)) return; | |
577 | ||
578 | // Save this particle | |
579 | particle->SetBit(kKeepBit); | |
580 | ||
581 | // Move to father if any | |
582 | if((curr=particle->GetFirstMother())==-1) return; | |
583 | } | |
584 | } | |
585 | ||
586 | //_____________________________________________________________________________ | |
ed54bf31 | 587 | void AliStack::KeepTrack(Int_t track) |
9e1a0ddb | 588 | { |
589 | // | |
590 | // Flags a track to be kept | |
591 | // | |
592 | ||
d94af0c1 | 593 | fParticleMap.At(track)->SetBit(kKeepBit); |
9e1a0ddb | 594 | } |
595 | ||
596 | //_____________________________________________________________________________ | |
ae96e41f | 597 | void AliStack::Clean(Int_t size) |
9e1a0ddb | 598 | { |
599 | // | |
ae96e41f | 600 | // Reset stack data except for fTreeK |
9e1a0ddb | 601 | // |
88cb7938 | 602 | |
9e1a0ddb | 603 | fNtrack=0; |
604 | fNprimary=0; | |
605 | fHgwmk=0; | |
606 | fLoadPoint=0; | |
607 | fCurrent = -1; | |
608 | ResetArrays(size); | |
609 | } | |
610 | ||
ae96e41f | 611 | //_____________________________________________________________________________ |
612 | void AliStack::Reset(Int_t size) | |
613 | { | |
614 | // | |
615 | // Reset stack data including fTreeK | |
616 | // | |
617 | ||
618 | Clean(size); | |
c38db470 | 619 | delete fParticleBuffer; fParticleBuffer = 0; |
ae96e41f | 620 | fTreeK = 0x0; |
621 | } | |
622 | ||
9e1a0ddb | 623 | //_____________________________________________________________________________ |
624 | void AliStack::ResetArrays(Int_t size) | |
625 | { | |
626 | // | |
627 | // Resets stack arrays | |
628 | // | |
d94af0c1 | 629 | fParticles.Clear(); |
630 | fParticleMap.Clear(); | |
631 | if (size>0) fParticleMap.Expand(size); | |
9e1a0ddb | 632 | } |
633 | ||
634 | //_____________________________________________________________________________ | |
e2afb3b6 | 635 | void AliStack::SetHighWaterMark(Int_t) |
9e1a0ddb | 636 | { |
637 | // | |
638 | // Set high water mark for last track in event | |
639 | // | |
6308b375 | 640 | |
942a9039 | 641 | fHgwmk = fNtrack-1; |
642 | fCurrentPrimary=fHgwmk; | |
643 | // Set also number of primary tracks | |
644 | fNprimary = fHgwmk+1; | |
9e1a0ddb | 645 | } |
646 | ||
647 | //_____________________________________________________________________________ | |
648 | TParticle* AliStack::Particle(Int_t i) | |
649 | { | |
650 | // | |
651 | // Return particle with specified ID | |
942a9039 | 652 | |
d94af0c1 | 653 | if(!fParticleMap.At(i)) { |
654 | Int_t nentries = fParticles.GetEntriesFast(); | |
9e1a0ddb | 655 | // algorithmic way of getting entry index |
656 | // (primary particles are filled after secondaries) | |
e94530da | 657 | Int_t entry = TreeKEntry(i); |
9e1a0ddb | 658 | // check whether algorithmic way and |
659 | // and the fParticleFileMap[i] give the same; | |
660 | // give the fatal error if not | |
661 | if (entry != fParticleFileMap[i]) { | |
21bf7095 | 662 | AliFatal(Form( |
9e1a0ddb | 663 | "!! The algorithmic way and map are different: !!\n entry: %d map: %d", |
21bf7095 | 664 | entry, fParticleFileMap[i])); |
9e1a0ddb | 665 | } |
942a9039 | 666 | // Load particle at entry into fParticleBuffer |
88cb7938 | 667 | TreeK()->GetEntry(entry); |
942a9039 | 668 | // Add to the TClonesarray |
d94af0c1 | 669 | new (fParticles[nentries]) TParticle(*fParticleBuffer); |
942a9039 | 670 | // Store a pointer in the TObjArray |
d94af0c1 | 671 | fParticleMap.AddAt(fParticles[nentries],i); |
9e1a0ddb | 672 | } |
d58b4b69 | 673 | return GetParticleMapEntry(i); |
9e1a0ddb | 674 | } |
675 | ||
e94530da | 676 | //_____________________________________________________________________________ |
677 | TParticle* AliStack::ParticleFromTreeK(Int_t id) const | |
678 | { | |
679 | // | |
680 | // return pointer to TParticle with label id | |
681 | // | |
682 | Int_t entry; | |
683 | if ((entry = TreeKEntry(id)) < 0) return 0; | |
684 | if (fTreeK->GetEntry(entry)<=0) return 0; | |
685 | return fParticleBuffer; | |
686 | } | |
687 | ||
688 | //_____________________________________________________________________________ | |
689 | Int_t AliStack::TreeKEntry(Int_t id) const | |
690 | { | |
691 | // | |
942a9039 | 692 | // Return entry number in the TreeK for particle with label id |
693 | // Return negative number if label>fNtrack | |
694 | // | |
695 | // The order of particles in TreeK reflects the order of the transport of primaries and production of secondaries: | |
e94530da | 696 | // |
942a9039 | 697 | // Before transport there are fNprimary particles on the stack. |
698 | // They are transported one by one and secondaries (fNtrack - fNprimary) are produced. | |
699 | // After the transport of each particles secondaries are written to the TreeK | |
700 | // They occupy the entries 0 ... fNtrack - fNprimary - 1 | |
701 | // The primaries are written after they have been transported and occupy | |
702 | // fNtrack - fNprimary .. fNtrack - 1 | |
703 | ||
e94530da | 704 | Int_t entry; |
705 | if (id<fNprimary) | |
706 | entry = id+fNtrack-fNprimary; | |
707 | else | |
708 | entry = id-fNprimary; | |
709 | return entry; | |
710 | } | |
711 | ||
5d8718b8 | 712 | //_____________________________________________________________________________ |
642f15cf | 713 | Int_t AliStack::GetCurrentParentTrackNumber() const |
5d8718b8 | 714 | { |
715 | // | |
716 | // Return number of the parent of the current track | |
717 | // | |
718 | ||
d58b4b69 | 719 | TParticle* current = GetParticleMapEntry(fCurrent); |
5d8718b8 | 720 | |
721 | if (current) | |
722 | return current->GetFirstMother(); | |
723 | else { | |
21bf7095 | 724 | AliWarning("Current track not found in the stack"); |
5d8718b8 | 725 | return -1; |
726 | } | |
727 | } | |
728 | ||
9e1a0ddb | 729 | //_____________________________________________________________________________ |
f5f55563 | 730 | Int_t AliStack::GetPrimary(Int_t id) |
9e1a0ddb | 731 | { |
732 | // | |
733 | // Return number of primary that has generated track | |
734 | // | |
735 | ||
736 | int current, parent; | |
9e1a0ddb | 737 | // |
738 | parent=id; | |
739 | while (1) { | |
740 | current=parent; | |
f5f55563 | 741 | parent=Particle(current)->GetFirstMother(); |
9e1a0ddb | 742 | if(parent<0) return current; |
743 | } | |
744 | } | |
745 | ||
746 | //_____________________________________________________________________________ | |
747 | void AliStack::DumpPart (Int_t i) const | |
748 | { | |
749 | // | |
750 | // Dumps particle i in the stack | |
751 | // | |
d58b4b69 | 752 | GetParticleMapEntry(i)->Print(); |
9e1a0ddb | 753 | } |
754 | ||
755 | //_____________________________________________________________________________ | |
756 | void AliStack::DumpPStack () | |
757 | { | |
758 | // | |
759 | // Dumps the particle stack | |
760 | // | |
761 | ||
3ab6f951 | 762 | Int_t i; |
763 | ||
88cb7938 | 764 | printf("\n\n=======================================================================\n"); |
3ab6f951 | 765 | for (i=0;i<fNtrack;i++) |
9e1a0ddb | 766 | { |
767 | TParticle* particle = Particle(i); | |
768 | if (particle) { | |
769 | printf("-> %d ",i); particle->Print(); | |
770 | printf("--------------------------------------------------------------\n"); | |
771 | } | |
772 | else | |
773 | Warning("DumpPStack", "No particle with id %d.", i); | |
774 | } | |
775 | ||
88cb7938 | 776 | printf("\n=======================================================================\n\n"); |
9e1a0ddb | 777 | |
778 | // print particle file map | |
9b4aee57 | 779 | // printf("\nParticle file map: \n"); |
780 | // for (i=0; i<fNtrack; i++) | |
781 | // printf(" %d th entry: %d \n",i,fParticleFileMap[i]); | |
9e1a0ddb | 782 | } |
783 | ||
784 | ||
785 | //_____________________________________________________________________________ | |
786 | void AliStack::DumpLoadedStack() const | |
787 | { | |
788 | // | |
789 | // Dumps the particle in the stack | |
790 | // that are loaded in memory. | |
791 | // | |
792 | ||
9e1a0ddb | 793 | printf( |
794 | "\n\n=======================================================================\n"); | |
795 | for (Int_t i=0;i<fNtrack;i++) | |
796 | { | |
d58b4b69 | 797 | TParticle* particle = GetParticleMapEntry(i); |
9e1a0ddb | 798 | if (particle) { |
799 | printf("-> %d ",i); particle->Print(); | |
800 | printf("--------------------------------------------------------------\n"); | |
801 | } | |
802 | else { | |
803 | printf("-> %d Particle not loaded.\n",i); | |
804 | printf("--------------------------------------------------------------\n"); | |
805 | } | |
806 | } | |
807 | printf( | |
808 | "\n=======================================================================\n\n"); | |
809 | } | |
810 | ||
dde0a601 | 811 | //_____________________________________________________________________________ |
812 | void AliStack::SetCurrentTrack(Int_t track) | |
813 | { | |
814 | fCurrent = track; | |
815 | if (fCurrent < fNprimary) fCurrentTrack = Particle(track); | |
816 | } | |
817 | ||
818 | ||
819 | //_____________________________________________________________________________ | |
9e1a0ddb | 820 | // |
821 | // protected methods | |
822 | // | |
823 | ||
824 | //_____________________________________________________________________________ | |
825 | void AliStack::CleanParents() | |
826 | { | |
827 | // | |
828 | // Clean particles stack | |
829 | // Set parent/daughter relations | |
830 | // | |
831 | ||
9e1a0ddb | 832 | TParticle *part; |
833 | int i; | |
834 | for(i=0; i<fHgwmk+1; i++) { | |
d58b4b69 | 835 | part = GetParticleMapEntry(i); |
9e1a0ddb | 836 | if(part) if(!part->TestBit(kDaughtersBit)) { |
837 | part->SetFirstDaughter(-1); | |
838 | part->SetLastDaughter(-1); | |
839 | } | |
840 | } | |
841 | } | |
842 | ||
843 | //_____________________________________________________________________________ | |
844 | TParticle* AliStack::GetNextParticle() | |
845 | { | |
846 | // | |
847 | // Return next particle from stack of particles | |
848 | // | |
849 | ||
850 | TParticle* particle = 0; | |
851 | ||
852 | // search secondaries | |
853 | //for(Int_t i=fNtrack-1; i>=0; i--) { | |
854 | for(Int_t i=fNtrack-1; i>fHgwmk; i--) { | |
d58b4b69 | 855 | particle = GetParticleMapEntry(i); |
9e1a0ddb | 856 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
857 | fCurrent=i; | |
9e1a0ddb | 858 | return particle; |
859 | } | |
860 | } | |
861 | ||
862 | // take next primary if all secondaries were done | |
863 | while (fCurrentPrimary>=0) { | |
864 | fCurrent = fCurrentPrimary; | |
d58b4b69 | 865 | particle = GetParticleMapEntry(fCurrentPrimary--); |
9e1a0ddb | 866 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
9e1a0ddb | 867 | return particle; |
868 | } | |
869 | } | |
870 | ||
871 | // nothing to be tracked | |
872 | fCurrent = -1; | |
6308b375 | 873 | |
874 | ||
9e1a0ddb | 875 | return particle; |
876 | } | |
88cb7938 | 877 | //__________________________________________________________________________________________ |
9e1a0ddb | 878 | |
942a9039 | 879 | void AliStack::ConnectTree(TTree* tree) |
9e1a0ddb | 880 | { |
881 | // | |
88cb7938 | 882 | // Creates branch for writing particles |
883 | // | |
ae96e41f | 884 | |
942a9039 | 885 | fTreeK = tree; |
886 | ||
21bf7095 | 887 | AliDebug(1, "Connecting TreeK"); |
88cb7938 | 888 | if (fTreeK == 0x0) |
889 | { | |
890 | if (TreeK() == 0x0) | |
891 | { | |
21bf7095 | 892 | AliFatal("Parameter is NULL");//we don't like such a jokes |
88cb7938 | 893 | return; |
894 | } | |
895 | return;//in this case TreeK() calls back this method (ConnectTree) | |
896 | //tree after setting fTreeK, the rest was already executed | |
897 | //it is safe to return now | |
898 | } | |
899 | ||
900 | // Create a branch for particles | |
901 | ||
21bf7095 | 902 | AliDebug(2, Form("Tree name is %s",fTreeK->GetName())); |
88cb7938 | 903 | |
904 | if (fTreeK->GetDirectory()) | |
905 | { | |
21bf7095 | 906 | AliDebug(2, Form("and dir is %s",fTreeK->GetDirectory()->GetName())); |
88cb7938 | 907 | } |
908 | else | |
21bf7095 | 909 | AliWarning("DIR IS NOT SET !!!"); |
88cb7938 | 910 | |
942a9039 | 911 | TBranch *branch=fTreeK->GetBranch("Particles"); |
88cb7938 | 912 | if(branch == 0x0) |
913 | { | |
942a9039 | 914 | branch = fTreeK->Branch("Particles", "TParticle", &fParticleBuffer, 4000); |
21bf7095 | 915 | AliDebug(2, "Creating Branch in Tree"); |
88cb7938 | 916 | } |
917 | else | |
918 | { | |
21bf7095 | 919 | AliDebug(2, "Branch Found in Tree"); |
88cb7938 | 920 | branch->SetAddress(&fParticleBuffer); |
921 | } | |
922 | if (branch->GetDirectory()) | |
923 | { | |
21bf7095 | 924 | AliDebug(1, Form("Branch Dir Name is %s",branch->GetDirectory()->GetName())); |
88cb7938 | 925 | } |
926 | else | |
21bf7095 | 927 | AliWarning("Branch Dir is NOT SET"); |
9e1a0ddb | 928 | } |
88cb7938 | 929 | |
5d8718b8 | 930 | //_____________________________________________________________________________ |
88cb7938 | 931 | |
932 | Bool_t AliStack::GetEvent() | |
9e1a0ddb | 933 | { |
934 | // | |
935 | // Get new event from TreeK | |
ccf7a81f | 936 | |
9e1a0ddb | 937 | // Reset/Create the particle stack |
88cb7938 | 938 | Int_t size = (Int_t)TreeK()->GetEntries(); |
9e1a0ddb | 939 | ResetArrays(size); |
ccf7a81f | 940 | return kTRUE; |
9e1a0ddb | 941 | } |
88cb7938 | 942 | //_____________________________________________________________________________ |
943 | ||
1fed0e8b | 944 | Bool_t AliStack::IsStable(Int_t pdg) const |
945 | { | |
f3069e25 | 946 | // |
947 | // Decide whether particle (pdg) is stable | |
948 | // | |
949 | ||
950 | ||
951 | // All ions/nucleons are considered as stable | |
952 | // Nuclear code is 10LZZZAAAI | |
953 | if(pdg>1000000000)return kTRUE; | |
1fed0e8b | 954 | |
3eca7cf1 | 955 | const Int_t kNstable = 16; |
f3069e25 | 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 | |
18a545dc | 964 | kK0Short, // K0s |
965 | kK0Long, // K0l | |
f3069e25 | 966 | kProton, // Proton |
967 | kNeutron, // Neutron | |
968 | kLambda0, // Lambda_0 | |
969 | kSigmaMinus, // Sigma Minus | |
f3069e25 | 970 | kSigmaPlus, // Sigma Plus |
3eca7cf1 | 971 | kSigma0, // Sigma 0 |
f3069e25 | 972 | 3312, // Xsi Minus |
973 | 3322, // Xsi | |
974 | 3334, // Omega | |
975 | }; | |
1fed0e8b | 976 | |
f3069e25 | 977 | Bool_t isStable = kFALSE; |
978 | for (i = 0; i < kNstable; i++) { | |
979 | if (pdg == TMath::Abs(pdgStable[i])) { | |
980 | isStable = kTRUE; | |
981 | break; | |
1fed0e8b | 982 | } |
f3069e25 | 983 | } |
984 | ||
985 | return isStable; | |
1fed0e8b | 986 | } |
987 | ||
dde0a601 | 988 | //_____________________________________________________________________________ |
1fed0e8b | 989 | Bool_t AliStack::IsPhysicalPrimary(Int_t index) |
990 | { | |
991 | // | |
992 | // Test if a particle is a physical primary according to the following definition: | |
993 | // Particles produced in the collision including products of strong and | |
994 | // electromagnetic decay and excluding feed-down from weak decays of strange | |
995 | // particles. | |
996 | // | |
997 | TParticle* p = Particle(index); | |
998 | Int_t ist = p->GetStatusCode(); | |
999 | ||
1000 | // | |
1001 | // Initial state particle | |
15013b36 | 1002 | if (ist > 1) return kFALSE; |
1fed0e8b | 1003 | |
1004 | Int_t pdg = TMath::Abs(p->GetPdgCode()); | |
1005 | ||
1006 | if (!IsStable(pdg)) return kFALSE; | |
1007 | ||
1008 | if (index < GetNprimary()) { | |
1009 | // | |
1010 | // Particle produced by generator | |
1011 | return kTRUE; | |
1012 | } else { | |
1013 | // | |
1014 | // Particle produced during transport | |
1015 | // | |
1b13a70f | 1016 | |
1fed0e8b | 1017 | Int_t imo = p->GetFirstMother(); |
1018 | TParticle* pm = Particle(imo); | |
1019 | Int_t mpdg = TMath::Abs(pm->GetPdgCode()); | |
1b13a70f | 1020 | // Check if it comes from a pi0 decay |
1021 | // | |
1022 | // What about the pi0 Dalitz ?? | |
1023 | // if ((mpdg == kPi0) && (imo < GetNprimary())) return kTRUE; | |
1024 | ||
1025 | // Check if this is a heavy flavor decay product | |
1fed0e8b | 1026 | Int_t mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); |
1027 | // | |
1028 | // Light hadron | |
1029 | if (mfl < 4) return kFALSE; | |
1030 | ||
1031 | // | |
1032 | // Heavy flavor hadron produced by generator | |
1033 | if (imo < GetNprimary()) { | |
1034 | return kTRUE; | |
1035 | } | |
1036 | ||
1037 | // To be sure that heavy flavor has not been produced in a secondary interaction | |
1038 | // Loop back to the generated mother | |
1039 | while (imo >= GetNprimary()) { | |
1b13a70f | 1040 | imo = pm->GetFirstMother(); |
1fed0e8b | 1041 | pm = Particle(imo); |
1042 | } | |
1043 | mpdg = TMath::Abs(pm->GetPdgCode()); | |
1044 | mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); | |
1045 | ||
1046 | if (mfl < 4) { | |
1047 | return kFALSE; | |
1048 | } else { | |
1049 | return kTRUE; | |
1050 | } | |
1051 | } // produced by generator ? | |
1052 | } |