]>
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); |
210 | ||
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 | |
229 | ||
d94af0c1 | 230 | fParticleMap.AddAtAndExpand(particle, fNtrack);//CHECK!! |
9e1a0ddb | 231 | |
232 | if(parent>=0) { | |
d94af0c1 | 233 | particle = dynamic_cast<TParticle*>(fParticleMap.At(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 | ||
284 | if (!particle->TestBit(kDoneBit)) | |
285 | return particle; | |
286 | else | |
287 | return 0; | |
288 | } | |
289 | ||
9e1a0ddb | 290 | //_____________________________________________________________________________ |
77db8cbf | 291 | Bool_t AliStack::PurifyKine() |
9e1a0ddb | 292 | { |
293 | // | |
294 | // Compress kinematic tree keeping only flagged particles | |
295 | // and renaming the particle id's in all the hits | |
296 | // | |
297 | ||
77db8cbf | 298 | int nkeep = fHgwmk + 1, parent, i; |
9e1a0ddb | 299 | TParticle *part, *father; |
d94af0c1 | 300 | fTrackLabelMap.Set(fParticleMap.GetLast()+1); |
9e1a0ddb | 301 | |
302 | // Save in Header total number of tracks before compression | |
9e1a0ddb | 303 | // If no tracks generated return now |
77db8cbf | 304 | if(fHgwmk+1 == fNtrack) return kFALSE; |
9e1a0ddb | 305 | |
9e1a0ddb | 306 | // First pass, invalid Daughter information |
942a9039 | 307 | for(i=0; i<fNtrack; i++) { |
308 | // Preset map, to be removed later | |
309 | if(i<=fHgwmk) fTrackLabelMap[i]=i ; | |
310 | else { | |
311 | fTrackLabelMap[i] = -99; | |
d94af0c1 | 312 | if((part=dynamic_cast<TParticle*>(fParticleMap.At(i)))) { |
e44c5340 | 313 | // |
314 | // Check of this track should be kept for physics reasons | |
942a9039 | 315 | if (KeepPhysics(part)) KeepTrack(i); |
e44c5340 | 316 | // |
942a9039 | 317 | part->ResetBit(kDaughtersBit); |
318 | part->SetFirstDaughter(-1); | |
319 | part->SetLastDaughter(-1); | |
320 | } | |
76969085 | 321 | } |
9e1a0ddb | 322 | } |
323 | // Invalid daughter information for the parent of the first particle | |
324 | // generated. This may or may not be the current primary according to | |
325 | // whether decays have been recorded among the primaries | |
d94af0c1 | 326 | part = dynamic_cast<TParticle*>(fParticleMap.At(fHgwmk+1)); |
327 | fParticleMap.At(part->GetFirstMother())->ResetBit(kDaughtersBit); | |
9e1a0ddb | 328 | // Second pass, build map between old and new numbering |
329 | for(i=fHgwmk+1; i<fNtrack; i++) { | |
d94af0c1 | 330 | if(fParticleMap.At(i)->TestBit(kKeepBit)) { |
942a9039 | 331 | // This particle has to be kept |
332 | fTrackLabelMap[i]=nkeep; | |
333 | // If old and new are different, have to move the pointer | |
d94af0c1 | 334 | if(i!=nkeep) fParticleMap[nkeep]=fParticleMap.At(i); |
335 | part = dynamic_cast<TParticle*>(fParticleMap.At(nkeep)); | |
942a9039 | 336 | // as the parent is always *before*, it must be already |
337 | // in place. This is what we are checking anyway! | |
f12d42ce | 338 | if((parent=part->GetFirstMother())>fHgwmk) { |
942a9039 | 339 | if(fTrackLabelMap[parent]==-99) Fatal("PurifyKine","fTrackLabelMap[%d] = -99!\n",parent); |
f12d42ce | 340 | else part->SetFirstMother(fTrackLabelMap[parent]);} |
942a9039 | 341 | nkeep++; |
342 | } | |
9e1a0ddb | 343 | } |
344 | ||
345 | // Fix daughters information | |
346 | for (i=fHgwmk+1; i<nkeep; i++) { | |
d94af0c1 | 347 | part = dynamic_cast<TParticle*>(fParticleMap.At(i)); |
942a9039 | 348 | parent = part->GetFirstMother(); |
349 | if(parent>=0) { | |
d94af0c1 | 350 | father = dynamic_cast<TParticle*>(fParticleMap.At(parent)); |
942a9039 | 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) { | |
d94af0c1 | 367 | fParticleBuffer = dynamic_cast<TParticle*>(fParticleMap.At(i)); |
942a9039 | 368 | fParticleFileMap[i]=static_cast<Int_t>(TreeK()->GetEntries()); |
369 | TreeK()->Fill(); | |
d94af0c1 | 370 | fParticleMap[i]=fParticleBuffer=0; |
942a9039 | 371 | } |
9e1a0ddb | 372 | |
d94af0c1 | 373 | for (i = nkeep; i < fNtrack; ++i) fParticleMap[i]=0; |
6308b375 | 374 | |
942a9039 | 375 | Int_t toshrink = fNtrack-fHgwmk-1; |
376 | fLoadPoint-=toshrink; | |
2b22f272 | 377 | |
d94af0c1 | 378 | for(i=fLoadPoint; i<fLoadPoint+toshrink; ++i) fParticles.RemoveAt(i); |
942a9039 | 379 | fNtrack=nkeep; |
380 | fHgwmk=nkeep-1; | |
77db8cbf | 381 | return kTRUE; |
6308b375 | 382 | } |
383 | ||
1166db55 | 384 | |
77db8cbf | 385 | Bool_t AliStack::ReorderKine() |
6308b375 | 386 | { |
387 | // | |
388 | // In some transport code children might not come in a continuous sequence. | |
389 | // In this case the stack has to be reordered in order to establish the | |
390 | // mother daughter relation using index ranges. | |
391 | // | |
77db8cbf | 392 | if(fHgwmk+1 == fNtrack) return kFALSE; |
6308b375 | 393 | |
394 | // | |
395 | // Howmany secondaries have been produced ? | |
396 | Int_t nNew = fNtrack - fHgwmk - 1; | |
a1d92a3f | 397 | |
6308b375 | 398 | if (nNew > 0) { |
399 | Int_t i, j; | |
6308b375 | 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++) { | |
d94af0c1 | 406 | if (fParticleMap.At(fHgwmk + 1 + i)) { |
407 | tmp[i] = (TParticle*) (fParticleMap.At(fHgwmk + 1 + i)); | |
6308b375 | 408 | } else { |
409 | tmp[i] = 0x0; | |
410 | } | |
411 | map1[i] = -99; | |
412 | } | |
413 | ||
414 | ||
415 | // | |
416 | // Reset LoadPoint | |
417 | // | |
1166db55 | 418 | Int_t loadPoint = fHgwmk + 1; |
6308b375 | 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(); | |
d94af0c1 | 429 | parP =dynamic_cast<TParticle*>(fParticleMap.At(ipa)); |
6308b375 | 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) { | |
d94af0c1 | 452 | fParticleMap[loadPoint] = tmp[j]; |
6308b375 | 453 | // Re-establish daughter information |
1166db55 | 454 | parP->SetLastDaughter(loadPoint); |
455 | if (parP->GetFirstDaughter() == -1) parP->SetFirstDaughter(loadPoint); | |
6308b375 | 456 | // Set Mother information |
457 | if (i != -1) { | |
458 | tmp[j]->SetFirstMother(map1[i]); | |
459 | } | |
460 | // Build the map | |
1166db55 | 461 | map1[j] = loadPoint; |
6308b375 | 462 | // Increase load point |
1166db55 | 463 | loadPoint++; |
6308b375 | 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 |
77db8cbf | 482 | |
483 | return kTRUE; | |
9e1a0ddb | 484 | } |
485 | ||
3e2e3ece | 486 | Bool_t AliStack::KeepPhysics(const TParticle* part) |
e44c5340 | 487 | { |
488 | // | |
489 | // Some particles have to kept on the stack for reasons motivated | |
490 | // by physics analysis. Decision is put here. | |
491 | // | |
492 | Bool_t keep = kFALSE; | |
493 | // | |
494 | // Keep first-generation daughter from primaries with heavy flavor | |
495 | // | |
496 | Int_t parent = part->GetFirstMother(); | |
497 | if (parent >= 0 && parent <= fHgwmk) { | |
e2afb3b6 | 498 | TParticle* father = dynamic_cast<TParticle*>(Particles()->At(parent)); |
e44c5340 | 499 | Int_t kf = father->GetPdgCode(); |
500 | kf = TMath::Abs(kf); | |
501 | Int_t kfl = kf; | |
502 | // meson ? | |
503 | if (kfl > 10) kfl/=100; | |
504 | // baryon | |
505 | if (kfl > 10) kfl/=10; | |
506 | if (kfl > 10) kfl/=10; | |
507 | if (kfl >= 4) { | |
508 | keep = kTRUE; | |
509 | } | |
510 | } | |
511 | return keep; | |
512 | } | |
513 | ||
9e1a0ddb | 514 | //_____________________________________________________________________________ |
515 | void AliStack::FinishEvent() | |
516 | { | |
88cb7938 | 517 | // |
518 | // Write out the kinematics that was not yet filled | |
519 | // | |
9e1a0ddb | 520 | |
88cb7938 | 521 | // Update event header |
9e1a0ddb | 522 | |
88cb7938 | 523 | if (!TreeK()) { |
9e1a0ddb | 524 | // Fatal("FinishEvent", "No kinematics tree is defined."); |
525 | // Don't panic this is a probably a lego run | |
526 | return; | |
9e1a0ddb | 527 | } |
528 | ||
529 | CleanParents(); | |
942a9039 | 530 | if(TreeK()->GetEntries() ==0) { |
9e1a0ddb | 531 | // set the fParticleFileMap size for the first time |
532 | fParticleFileMap.Set(fHgwmk+1); | |
533 | } | |
534 | ||
535 | Bool_t allFilled = kFALSE; | |
536 | TObject *part; | |
537 | for(Int_t i=0; i<fHgwmk+1; ++i) | |
d94af0c1 | 538 | if((part=fParticleMap.At(i))) { |
e2afb3b6 | 539 | fParticleBuffer = dynamic_cast<TParticle*>(part); |
88cb7938 | 540 | fParticleFileMap[i]= static_cast<Int_t>(TreeK()->GetEntries()); |
541 | TreeK()->Fill(); | |
da2af24c | 542 | fParticleBuffer=0; |
d94af0c1 | 543 | fParticleMap.AddAt(0,i); |
9e1a0ddb | 544 | |
545 | // When all primaries were filled no particle!=0 | |
546 | // should be left => to be removed later. | |
21bf7095 | 547 | if (allFilled) AliWarning(Form("Why != 0 part # %d?\n",i)); |
9e1a0ddb | 548 | } |
88cb7938 | 549 | else |
550 | { | |
9e1a0ddb | 551 | // // printf("Why = 0 part # %d?\n",i); => We know. |
552 | // break; | |
88cb7938 | 553 | // we don't break now in order to be sure there is no |
554 | // particle !=0 left. | |
555 | // To be removed later and replaced with break. | |
556 | if(!allFilled) allFilled = kTRUE; | |
557 | } | |
9e1a0ddb | 558 | } |
9e1a0ddb | 559 | //_____________________________________________________________________________ |
88cb7938 | 560 | |
9e1a0ddb | 561 | void AliStack::FlagTrack(Int_t track) |
562 | { | |
563 | // | |
564 | // Flags a track and all its family tree to be kept | |
565 | // | |
566 | ||
567 | TParticle *particle; | |
568 | ||
569 | Int_t curr=track; | |
570 | while(1) { | |
d94af0c1 | 571 | particle=dynamic_cast<TParticle*>(fParticleMap.At(curr)); |
9e1a0ddb | 572 | |
573 | // If the particle is flagged the three from here upward is saved already | |
574 | if(particle->TestBit(kKeepBit)) return; | |
575 | ||
576 | // Save this particle | |
577 | particle->SetBit(kKeepBit); | |
578 | ||
579 | // Move to father if any | |
580 | if((curr=particle->GetFirstMother())==-1) return; | |
581 | } | |
582 | } | |
583 | ||
584 | //_____________________________________________________________________________ | |
ed54bf31 | 585 | void AliStack::KeepTrack(Int_t track) |
9e1a0ddb | 586 | { |
587 | // | |
588 | // Flags a track to be kept | |
589 | // | |
590 | ||
d94af0c1 | 591 | fParticleMap.At(track)->SetBit(kKeepBit); |
9e1a0ddb | 592 | } |
593 | ||
594 | //_____________________________________________________________________________ | |
ae96e41f | 595 | void AliStack::Clean(Int_t size) |
9e1a0ddb | 596 | { |
597 | // | |
ae96e41f | 598 | // Reset stack data except for fTreeK |
9e1a0ddb | 599 | // |
88cb7938 | 600 | |
9e1a0ddb | 601 | fNtrack=0; |
602 | fNprimary=0; | |
603 | fHgwmk=0; | |
604 | fLoadPoint=0; | |
605 | fCurrent = -1; | |
606 | ResetArrays(size); | |
607 | } | |
608 | ||
ae96e41f | 609 | //_____________________________________________________________________________ |
610 | void AliStack::Reset(Int_t size) | |
611 | { | |
612 | // | |
613 | // Reset stack data including fTreeK | |
614 | // | |
615 | ||
616 | Clean(size); | |
c38db470 | 617 | delete fParticleBuffer; fParticleBuffer = 0; |
ae96e41f | 618 | fTreeK = 0x0; |
619 | } | |
620 | ||
9e1a0ddb | 621 | //_____________________________________________________________________________ |
622 | void AliStack::ResetArrays(Int_t size) | |
623 | { | |
624 | // | |
625 | // Resets stack arrays | |
626 | // | |
d94af0c1 | 627 | fParticles.Clear(); |
628 | fParticleMap.Clear(); | |
629 | if (size>0) fParticleMap.Expand(size); | |
9e1a0ddb | 630 | } |
631 | ||
632 | //_____________________________________________________________________________ | |
e2afb3b6 | 633 | void AliStack::SetHighWaterMark(Int_t) |
9e1a0ddb | 634 | { |
635 | // | |
636 | // Set high water mark for last track in event | |
637 | // | |
6308b375 | 638 | |
942a9039 | 639 | fHgwmk = fNtrack-1; |
640 | fCurrentPrimary=fHgwmk; | |
641 | // Set also number of primary tracks | |
642 | fNprimary = fHgwmk+1; | |
9e1a0ddb | 643 | } |
644 | ||
645 | //_____________________________________________________________________________ | |
646 | TParticle* AliStack::Particle(Int_t i) | |
647 | { | |
648 | // | |
649 | // Return particle with specified ID | |
942a9039 | 650 | |
d94af0c1 | 651 | if(!fParticleMap.At(i)) { |
652 | Int_t nentries = fParticles.GetEntriesFast(); | |
9e1a0ddb | 653 | // algorithmic way of getting entry index |
654 | // (primary particles are filled after secondaries) | |
e94530da | 655 | Int_t entry = TreeKEntry(i); |
9e1a0ddb | 656 | // check whether algorithmic way and |
657 | // and the fParticleFileMap[i] give the same; | |
658 | // give the fatal error if not | |
659 | if (entry != fParticleFileMap[i]) { | |
21bf7095 | 660 | AliFatal(Form( |
9e1a0ddb | 661 | "!! The algorithmic way and map are different: !!\n entry: %d map: %d", |
21bf7095 | 662 | entry, fParticleFileMap[i])); |
9e1a0ddb | 663 | } |
942a9039 | 664 | // Load particle at entry into fParticleBuffer |
88cb7938 | 665 | TreeK()->GetEntry(entry); |
942a9039 | 666 | // Add to the TClonesarray |
d94af0c1 | 667 | new (fParticles[nentries]) TParticle(*fParticleBuffer); |
942a9039 | 668 | // Store a pointer in the TObjArray |
d94af0c1 | 669 | fParticleMap.AddAt(fParticles[nentries],i); |
9e1a0ddb | 670 | } |
d94af0c1 | 671 | return dynamic_cast<TParticle*>(fParticleMap.At(i)); |
9e1a0ddb | 672 | } |
673 | ||
e94530da | 674 | //_____________________________________________________________________________ |
675 | TParticle* AliStack::ParticleFromTreeK(Int_t id) const | |
676 | { | |
677 | // | |
678 | // return pointer to TParticle with label id | |
679 | // | |
680 | Int_t entry; | |
681 | if ((entry = TreeKEntry(id)) < 0) return 0; | |
682 | if (fTreeK->GetEntry(entry)<=0) return 0; | |
683 | return fParticleBuffer; | |
684 | } | |
685 | ||
686 | //_____________________________________________________________________________ | |
687 | Int_t AliStack::TreeKEntry(Int_t id) const | |
688 | { | |
689 | // | |
942a9039 | 690 | // Return entry number in the TreeK for particle with label id |
691 | // Return negative number if label>fNtrack | |
692 | // | |
693 | // The order of particles in TreeK reflects the order of the transport of primaries and production of secondaries: | |
e94530da | 694 | // |
942a9039 | 695 | // Before transport there are fNprimary particles on the stack. |
696 | // They are transported one by one and secondaries (fNtrack - fNprimary) are produced. | |
697 | // After the transport of each particles secondaries are written to the TreeK | |
698 | // They occupy the entries 0 ... fNtrack - fNprimary - 1 | |
699 | // The primaries are written after they have been transported and occupy | |
700 | // fNtrack - fNprimary .. fNtrack - 1 | |
701 | ||
e94530da | 702 | Int_t entry; |
703 | if (id<fNprimary) | |
704 | entry = id+fNtrack-fNprimary; | |
705 | else | |
706 | entry = id-fNprimary; | |
707 | return entry; | |
708 | } | |
709 | ||
5d8718b8 | 710 | //_____________________________________________________________________________ |
642f15cf | 711 | Int_t AliStack::GetCurrentParentTrackNumber() const |
5d8718b8 | 712 | { |
713 | // | |
714 | // Return number of the parent of the current track | |
715 | // | |
716 | ||
d94af0c1 | 717 | TParticle* current = (TParticle*)fParticleMap.At(fCurrent); |
5d8718b8 | 718 | |
719 | if (current) | |
720 | return current->GetFirstMother(); | |
721 | else { | |
21bf7095 | 722 | AliWarning("Current track not found in the stack"); |
5d8718b8 | 723 | return -1; |
724 | } | |
725 | } | |
726 | ||
9e1a0ddb | 727 | //_____________________________________________________________________________ |
f5f55563 | 728 | Int_t AliStack::GetPrimary(Int_t id) |
9e1a0ddb | 729 | { |
730 | // | |
731 | // Return number of primary that has generated track | |
732 | // | |
733 | ||
734 | int current, parent; | |
9e1a0ddb | 735 | // |
736 | parent=id; | |
737 | while (1) { | |
738 | current=parent; | |
f5f55563 | 739 | parent=Particle(current)->GetFirstMother(); |
9e1a0ddb | 740 | if(parent<0) return current; |
741 | } | |
742 | } | |
743 | ||
744 | //_____________________________________________________________________________ | |
745 | void AliStack::DumpPart (Int_t i) const | |
746 | { | |
747 | // | |
748 | // Dumps particle i in the stack | |
749 | // | |
d94af0c1 | 750 | dynamic_cast<TParticle*>(fParticleMap.At(i))->Print(); |
9e1a0ddb | 751 | } |
752 | ||
753 | //_____________________________________________________________________________ | |
754 | void AliStack::DumpPStack () | |
755 | { | |
756 | // | |
757 | // Dumps the particle stack | |
758 | // | |
759 | ||
3ab6f951 | 760 | Int_t i; |
761 | ||
88cb7938 | 762 | printf("\n\n=======================================================================\n"); |
3ab6f951 | 763 | for (i=0;i<fNtrack;i++) |
9e1a0ddb | 764 | { |
765 | TParticle* particle = Particle(i); | |
766 | if (particle) { | |
767 | printf("-> %d ",i); particle->Print(); | |
768 | printf("--------------------------------------------------------------\n"); | |
769 | } | |
770 | else | |
771 | Warning("DumpPStack", "No particle with id %d.", i); | |
772 | } | |
773 | ||
88cb7938 | 774 | printf("\n=======================================================================\n\n"); |
9e1a0ddb | 775 | |
776 | // print particle file map | |
777 | printf("\nParticle file map: \n"); | |
3ab6f951 | 778 | for (i=0; i<fNtrack; i++) |
9e1a0ddb | 779 | printf(" %d th entry: %d \n",i,fParticleFileMap[i]); |
780 | } | |
781 | ||
782 | ||
783 | //_____________________________________________________________________________ | |
784 | void AliStack::DumpLoadedStack() const | |
785 | { | |
786 | // | |
787 | // Dumps the particle in the stack | |
788 | // that are loaded in memory. | |
789 | // | |
790 | ||
9e1a0ddb | 791 | printf( |
792 | "\n\n=======================================================================\n"); | |
793 | for (Int_t i=0;i<fNtrack;i++) | |
794 | { | |
d94af0c1 | 795 | TParticle* particle = dynamic_cast<TParticle*>(fParticleMap[i]); |
9e1a0ddb | 796 | if (particle) { |
797 | printf("-> %d ",i); particle->Print(); | |
798 | printf("--------------------------------------------------------------\n"); | |
799 | } | |
800 | else { | |
801 | printf("-> %d Particle not loaded.\n",i); | |
802 | printf("--------------------------------------------------------------\n"); | |
803 | } | |
804 | } | |
805 | printf( | |
806 | "\n=======================================================================\n\n"); | |
807 | } | |
808 | ||
809 | // | |
810 | // protected methods | |
811 | // | |
812 | ||
813 | //_____________________________________________________________________________ | |
814 | void AliStack::CleanParents() | |
815 | { | |
816 | // | |
817 | // Clean particles stack | |
818 | // Set parent/daughter relations | |
819 | // | |
820 | ||
9e1a0ddb | 821 | TParticle *part; |
822 | int i; | |
823 | for(i=0; i<fHgwmk+1; i++) { | |
d94af0c1 | 824 | part = dynamic_cast<TParticle*>(fParticleMap.At(i)); |
9e1a0ddb | 825 | if(part) if(!part->TestBit(kDaughtersBit)) { |
826 | part->SetFirstDaughter(-1); | |
827 | part->SetLastDaughter(-1); | |
828 | } | |
829 | } | |
830 | } | |
831 | ||
832 | //_____________________________________________________________________________ | |
833 | TParticle* AliStack::GetNextParticle() | |
834 | { | |
835 | // | |
836 | // Return next particle from stack of particles | |
837 | // | |
838 | ||
839 | TParticle* particle = 0; | |
840 | ||
841 | // search secondaries | |
842 | //for(Int_t i=fNtrack-1; i>=0; i--) { | |
843 | for(Int_t i=fNtrack-1; i>fHgwmk; i--) { | |
d94af0c1 | 844 | particle = dynamic_cast<TParticle*>(fParticleMap.At(i)); |
9e1a0ddb | 845 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
846 | fCurrent=i; | |
9e1a0ddb | 847 | return particle; |
848 | } | |
849 | } | |
850 | ||
851 | // take next primary if all secondaries were done | |
852 | while (fCurrentPrimary>=0) { | |
853 | fCurrent = fCurrentPrimary; | |
d94af0c1 | 854 | particle = dynamic_cast<TParticle*>(fParticleMap.At(fCurrentPrimary--)); |
9e1a0ddb | 855 | if ((particle) && (!particle->TestBit(kDoneBit))) { |
9e1a0ddb | 856 | return particle; |
857 | } | |
858 | } | |
859 | ||
860 | // nothing to be tracked | |
861 | fCurrent = -1; | |
6308b375 | 862 | |
863 | ||
9e1a0ddb | 864 | return particle; |
865 | } | |
88cb7938 | 866 | //__________________________________________________________________________________________ |
9e1a0ddb | 867 | |
942a9039 | 868 | void AliStack::ConnectTree(TTree* tree) |
9e1a0ddb | 869 | { |
870 | // | |
88cb7938 | 871 | // Creates branch for writing particles |
872 | // | |
ae96e41f | 873 | |
942a9039 | 874 | fTreeK = tree; |
875 | ||
21bf7095 | 876 | AliDebug(1, "Connecting TreeK"); |
88cb7938 | 877 | if (fTreeK == 0x0) |
878 | { | |
879 | if (TreeK() == 0x0) | |
880 | { | |
21bf7095 | 881 | AliFatal("Parameter is NULL");//we don't like such a jokes |
88cb7938 | 882 | return; |
883 | } | |
884 | return;//in this case TreeK() calls back this method (ConnectTree) | |
885 | //tree after setting fTreeK, the rest was already executed | |
886 | //it is safe to return now | |
887 | } | |
888 | ||
889 | // Create a branch for particles | |
890 | ||
21bf7095 | 891 | AliDebug(2, Form("Tree name is %s",fTreeK->GetName())); |
88cb7938 | 892 | |
893 | if (fTreeK->GetDirectory()) | |
894 | { | |
21bf7095 | 895 | AliDebug(2, Form("and dir is %s",fTreeK->GetDirectory()->GetName())); |
88cb7938 | 896 | } |
897 | else | |
21bf7095 | 898 | AliWarning("DIR IS NOT SET !!!"); |
88cb7938 | 899 | |
942a9039 | 900 | TBranch *branch=fTreeK->GetBranch("Particles"); |
88cb7938 | 901 | if(branch == 0x0) |
902 | { | |
942a9039 | 903 | branch = fTreeK->Branch("Particles", "TParticle", &fParticleBuffer, 4000); |
21bf7095 | 904 | AliDebug(2, "Creating Branch in Tree"); |
88cb7938 | 905 | } |
906 | else | |
907 | { | |
21bf7095 | 908 | AliDebug(2, "Branch Found in Tree"); |
88cb7938 | 909 | branch->SetAddress(&fParticleBuffer); |
910 | } | |
911 | if (branch->GetDirectory()) | |
912 | { | |
21bf7095 | 913 | AliDebug(1, Form("Branch Dir Name is %s",branch->GetDirectory()->GetName())); |
88cb7938 | 914 | } |
915 | else | |
21bf7095 | 916 | AliWarning("Branch Dir is NOT SET"); |
9e1a0ddb | 917 | } |
88cb7938 | 918 | |
5d8718b8 | 919 | //_____________________________________________________________________________ |
88cb7938 | 920 | |
921 | Bool_t AliStack::GetEvent() | |
9e1a0ddb | 922 | { |
923 | // | |
924 | // Get new event from TreeK | |
ccf7a81f | 925 | |
9e1a0ddb | 926 | // Reset/Create the particle stack |
88cb7938 | 927 | Int_t size = (Int_t)TreeK()->GetEntries(); |
9e1a0ddb | 928 | ResetArrays(size); |
ccf7a81f | 929 | return kTRUE; |
9e1a0ddb | 930 | } |
88cb7938 | 931 | //_____________________________________________________________________________ |
932 | ||
1fed0e8b | 933 | Bool_t AliStack::IsStable(Int_t pdg) const |
934 | { | |
f3069e25 | 935 | // |
936 | // Decide whether particle (pdg) is stable | |
937 | // | |
938 | ||
939 | ||
940 | // All ions/nucleons are considered as stable | |
941 | // Nuclear code is 10LZZZAAAI | |
942 | if(pdg>1000000000)return kTRUE; | |
1fed0e8b | 943 | |
18a545dc | 944 | const Int_t kNstable = 15; |
f3069e25 | 945 | Int_t i; |
946 | ||
947 | Int_t pdgStable[kNstable] = { | |
948 | kGamma, // Photon | |
949 | kElectron, // Electron | |
950 | kMuonPlus, // Muon | |
951 | kPiPlus, // Pion | |
952 | kKPlus, // Kaon | |
18a545dc | 953 | kK0Short, // K0s |
954 | kK0Long, // K0l | |
f3069e25 | 955 | kProton, // Proton |
956 | kNeutron, // Neutron | |
957 | kLambda0, // Lambda_0 | |
958 | kSigmaMinus, // Sigma Minus | |
f3069e25 | 959 | kSigmaPlus, // Sigma Plus |
960 | 3312, // Xsi Minus | |
961 | 3322, // Xsi | |
962 | 3334, // Omega | |
963 | }; | |
1fed0e8b | 964 | |
f3069e25 | 965 | Bool_t isStable = kFALSE; |
966 | for (i = 0; i < kNstable; i++) { | |
967 | if (pdg == TMath::Abs(pdgStable[i])) { | |
968 | isStable = kTRUE; | |
969 | break; | |
1fed0e8b | 970 | } |
f3069e25 | 971 | } |
972 | ||
973 | return isStable; | |
1fed0e8b | 974 | } |
975 | ||
976 | Bool_t AliStack::IsPhysicalPrimary(Int_t index) | |
977 | { | |
978 | // | |
979 | // Test if a particle is a physical primary according to the following definition: | |
980 | // Particles produced in the collision including products of strong and | |
981 | // electromagnetic decay and excluding feed-down from weak decays of strange | |
982 | // particles. | |
983 | // | |
984 | TParticle* p = Particle(index); | |
985 | Int_t ist = p->GetStatusCode(); | |
986 | ||
987 | // | |
988 | // Initial state particle | |
15013b36 | 989 | if (ist > 1) return kFALSE; |
1fed0e8b | 990 | |
991 | Int_t pdg = TMath::Abs(p->GetPdgCode()); | |
992 | ||
993 | if (!IsStable(pdg)) return kFALSE; | |
994 | ||
995 | if (index < GetNprimary()) { | |
996 | // | |
997 | // Particle produced by generator | |
998 | return kTRUE; | |
999 | } else { | |
1000 | // | |
1001 | // Particle produced during transport | |
1002 | // | |
1b13a70f | 1003 | |
1fed0e8b | 1004 | Int_t imo = p->GetFirstMother(); |
1005 | TParticle* pm = Particle(imo); | |
1006 | Int_t mpdg = TMath::Abs(pm->GetPdgCode()); | |
1b13a70f | 1007 | // Check if it comes from a pi0 decay |
1008 | // | |
1009 | // What about the pi0 Dalitz ?? | |
1010 | // if ((mpdg == kPi0) && (imo < GetNprimary())) return kTRUE; | |
1011 | ||
1012 | // Check if this is a heavy flavor decay product | |
1fed0e8b | 1013 | Int_t mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); |
1014 | // | |
1015 | // Light hadron | |
1016 | if (mfl < 4) return kFALSE; | |
1017 | ||
1018 | // | |
1019 | // Heavy flavor hadron produced by generator | |
1020 | if (imo < GetNprimary()) { | |
1021 | return kTRUE; | |
1022 | } | |
1023 | ||
1024 | // To be sure that heavy flavor has not been produced in a secondary interaction | |
1025 | // Loop back to the generated mother | |
1026 | while (imo >= GetNprimary()) { | |
1b13a70f | 1027 | imo = pm->GetFirstMother(); |
1fed0e8b | 1028 | pm = Particle(imo); |
1029 | } | |
1030 | mpdg = TMath::Abs(pm->GetPdgCode()); | |
1031 | mfl = Int_t (mpdg / TMath::Power(10, Int_t(TMath::Log10(mpdg)))); | |
1032 | ||
1033 | if (mfl < 4) { | |
1034 | return kFALSE; | |
1035 | } else { | |
1036 | return kTRUE; | |
1037 | } | |
1038 | } // produced by generator ? | |
1039 | } |