Changes suggested by Effective C++ (F.Carminati)
[u/mrichter/AliRoot.git] / STEER / AliStack.cxx
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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
29#include <TObjArray.h>
30#include <TParticle.h>
fe046ade 31#include <TParticlePDG.h>
9e1a0ddb 32#include <TTree.h>
9e1a0ddb 33
21bf7095 34#include "AliLog.h"
9e1a0ddb 35#include "AliHit.h"
88cb7938 36#include "AliModule.h"
37#include "AliRun.h"
5d12ce38 38#include "AliMC.h"
88cb7938 39#include "AliRunLoader.h"
40#include "AliStack.h"
9e1a0ddb 41
42ClassImp(AliStack)
43
e2afb3b6 44//_______________________________________________________________________
45AliStack::AliStack():
46 fParticles(0),
47 fParticleMap(0),
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),
e191bb57 58 fEventFolderName(AliConfig::GetDefaultEventFolderName())
9e1a0ddb 59{
60 //
e2afb3b6 61 // Default constructor
9e1a0ddb 62 //
9e1a0ddb 63}
64
e2afb3b6 65//_______________________________________________________________________
88cb7938 66AliStack::AliStack(Int_t size, const char* evfoldname):
e2afb3b6 67 fParticles(new TClonesArray("TParticle",1000)),
68 fParticleMap(new TObjArray(size)),
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),
79 fEventFolderName(evfoldname)
e2afb3b6 80{
81 //
82 // Constructor
83 //
84}
9e1a0ddb 85
e2afb3b6 86//_______________________________________________________________________
87AliStack::AliStack(const AliStack& st):
88 TVirtualMCStack(st),
89 fParticles(0),
90 fParticleMap(0),
91 fParticleFileMap(0),
92 fParticleBuffer(0),
90e48c0c 93 fCurrentTrack(0),
e2afb3b6 94 fTreeK(0),
95 fNtrack(0),
96 fNprimary(0),
97 fCurrent(-1),
98 fCurrentPrimary(-1),
99 fHgwmk(0),
90e48c0c 100 fLoadPoint(0),
101 fEventFolderName()
9e1a0ddb 102{
103 //
e2afb3b6 104 // Copy constructor
9e1a0ddb 105 //
e2afb3b6 106 st.Copy(*this);
9e1a0ddb 107}
108
e2afb3b6 109//_______________________________________________________________________
6c4904c2 110void AliStack::Copy(TObject&) const
e2afb3b6 111{
21bf7095 112 AliFatal("Not implemented!");
e2afb3b6 113}
9e1a0ddb 114
e2afb3b6 115//_______________________________________________________________________
9e1a0ddb 116AliStack::~AliStack()
117{
118 //
119 // Destructor
120 //
121
122 if (fParticles) {
123 fParticles->Delete();
124 delete fParticles;
125 }
126 delete fParticleMap;
88cb7938 127 //PH??? delete fTreeK;
9e1a0ddb 128}
129
130//
131// public methods
132//
133
134//_____________________________________________________________________________
642f15cf 135void AliStack::PushTrack(Int_t done, Int_t parent, Int_t pdg, Float_t *pmom,
88cb7938 136 Float_t *vpos, Float_t *polar, Float_t tof,
137 TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is)
9e1a0ddb 138{
139 //
140 // Load a track on the stack
141 //
142 // done 0 if the track has to be transported
143 // 1 if not
144 // parent identifier of the parent track. -1 for a primary
145 // pdg particle code
146 // pmom momentum GeV/c
147 // vpos position
148 // polar polarisation
149 // tof time of flight in seconds
150 // mecha production mechanism
151 // ntr on output the number of the track stored
152 //
153
9e1a0ddb 154 // const Float_t tlife=0;
155
156 //
157 // Here we get the static mass
158 // For MC is ok, but a more sophisticated method could be necessary
159 // if the calculated mass is required
160 // also, this method is potentially dangerous if the mass
161 // used in the MC is not the same of the PDG database
162 //
fe046ade 163 TParticlePDG* pmc = TDatabasePDG::Instance()->GetParticle(pdg);
164 if (pmc) {
165 Float_t mass = TDatabasePDG::Instance()->GetParticle(pdg)->Mass();
166 Float_t e=TMath::Sqrt(mass*mass+pmom[0]*pmom[0]+
167 pmom[1]*pmom[1]+pmom[2]*pmom[2]);
168
ccf7a81f 169// 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",
170// mass,e,fNtrack,pdg,parent,done,vpos[0],vpos[1],vpos[2],pmom[0],pmom[1],pmom[2],kS);
171
9e1a0ddb 172
642f15cf 173 PushTrack(done, parent, pdg, pmom[0], pmom[1], pmom[2], e,
fe046ade 174 vpos[0], vpos[1], vpos[2], tof, polar[0], polar[1], polar[2],
175 mech, ntr, weight, is);
176 } else {
21bf7095 177 AliWarning(Form("Particle type %d not defined in PDG Database !", pdg));
178 AliWarning("Particle skipped !");
fe046ade 179 }
9e1a0ddb 180}
181
182//_____________________________________________________________________________
642f15cf 183void AliStack::PushTrack(Int_t done, Int_t parent, Int_t pdg,
9e1a0ddb 184 Double_t px, Double_t py, Double_t pz, Double_t e,
185 Double_t vx, Double_t vy, Double_t vz, Double_t tof,
186 Double_t polx, Double_t poly, Double_t polz,
98490ea9 187 TMCProcess mech, Int_t &ntr, Double_t weight, Int_t is)
9e1a0ddb 188{
189 //
190 // Load a track on the stack
191 //
192 // done 0 if the track has to be transported
193 // 1 if not
194 // parent identifier of the parent track. -1 for a primary
195 // pdg particle code
196 // kS generation status code
197 // px, py, pz momentum GeV/c
198 // vx, vy, vz position
199 // polar polarisation
200 // tof time of flight in seconds
201 // mech production mechanism
202 // ntr on output the number of the track stored
203 //
204 // New method interface:
205 // arguments were changed to be in correspondence with TParticle
206 // constructor.
207 // Note: the energy is not calculated from the static mass but
208 // it is passed by argument e.
209
210
9e1a0ddb 211 const Int_t kFirstDaughter=-1;
212 const Int_t kLastDaughter=-1;
6308b375 213
214
9e1a0ddb 215 TClonesArray &particles = *fParticles;
216 TParticle* particle
217 = new(particles[fLoadPoint++])
47c8bcbe 218 TParticle(pdg, is, parent, -1, kFirstDaughter, kLastDaughter,
9e1a0ddb 219 px, py, pz, e, vx, vy, vz, tof);
220
221 particle->SetPolarisation(polx, poly, polz);
222 particle->SetWeight(weight);
223 particle->SetUniqueID(mech);
224
225 if(!done) particle->SetBit(kDoneBit);
226
227 // Declare that the daughter information is valid
228 particle->SetBit(kDaughtersBit);
229 // Add the particle to the stack
6308b375 230
231
9e1a0ddb 232 fParticleMap->AddAtAndExpand(particle, fNtrack);//CHECK!!
233
234 if(parent>=0) {
e2afb3b6 235 particle = dynamic_cast<TParticle*>(fParticleMap->At(parent));
1305ca2f 236 if (particle) {
237 particle->SetLastDaughter(fNtrack);
238 if(particle->GetFirstDaughter()<0) particle->SetFirstDaughter(fNtrack);
239 }
240 else {
21bf7095 241 AliError(Form("Parent %d does not exist",parent));
1305ca2f 242 }
9e1a0ddb 243 }
244 else {
245 //
246 // This is a primary track. Set high water mark for this event
247 fHgwmk = fNtrack;
248 //
249 // Set also number if primary tracks
250 fNprimary = fHgwmk+1;
251 fCurrentPrimary++;
252 }
253 ntr = fNtrack++;
254}
255
256//_____________________________________________________________________________
642f15cf 257TParticle* AliStack::PopNextTrack(Int_t& itrack)
b9d0a01d 258{
259 //
260 // Returns next track from stack of particles
261 //
262
263
264 TParticle* track = GetNextParticle();
265
266 if (track) {
267 itrack = fCurrent;
268 track->SetBit(kDoneBit);
269 }
fe046ade 270 else
b9d0a01d 271 itrack = -1;
fe046ade 272
273 fCurrentTrack = track;
b9d0a01d 274 return track;
275}
276
b9d0a01d 277//_____________________________________________________________________________
642f15cf 278TParticle* AliStack::PopPrimaryForTracking(Int_t i)
b9d0a01d 279{
280 //
281 // Returns i-th primary particle if it is flagged to be tracked,
282 // 0 otherwise
283 //
284
285 TParticle* particle = Particle(i);
286
287 if (!particle->TestBit(kDoneBit))
288 return particle;
289 else
290 return 0;
291}
292
9e1a0ddb 293//_____________________________________________________________________________
294void AliStack::PurifyKine()
295{
296 //
297 // Compress kinematic tree keeping only flagged particles
298 // and renaming the particle id's in all the hits
299 //
300
301 TObjArray &particles = *fParticleMap;
302 int nkeep=fHgwmk+1, parent, i;
303 TParticle *part, *father;
304 TArrayI map(particles.GetLast()+1);
305
306 // Save in Header total number of tracks before compression
9e1a0ddb 307 // If no tracks generated return now
308 if(fHgwmk+1 == fNtrack) return;
309
9e1a0ddb 310 // First pass, invalid Daughter information
6308b375 311
9e1a0ddb 312 for(i=0; i<fNtrack; i++) {
313 // Preset map, to be removed later
314 if(i<=fHgwmk) map[i]=i ;
315 else {
316 map[i] = -99;
e2afb3b6 317 if((part=dynamic_cast<TParticle*>(particles.At(i)))) {
e44c5340 318//
319// Check of this track should be kept for physics reasons
88cb7938 320 if (KeepPhysics(part)) KeepTrack(i);
e44c5340 321//
76969085 322 part->ResetBit(kDaughtersBit);
323 part->SetFirstDaughter(-1);
324 part->SetLastDaughter(-1);
325 }
9e1a0ddb 326 }
327 }
328 // Invalid daughter information for the parent of the first particle
329 // generated. This may or may not be the current primary according to
330 // whether decays have been recorded among the primaries
e2afb3b6 331 part = dynamic_cast<TParticle*>(particles.At(fHgwmk+1));
9e1a0ddb 332 particles.At(part->GetFirstMother())->ResetBit(kDaughtersBit);
333 // Second pass, build map between old and new numbering
334 for(i=fHgwmk+1; i<fNtrack; i++) {
335 if(particles.At(i)->TestBit(kKeepBit)) {
336
337 // This particle has to be kept
338 map[i]=nkeep;
339 // If old and new are different, have to move the pointer
340 if(i!=nkeep) particles[nkeep]=particles.At(i);
e2afb3b6 341 part = dynamic_cast<TParticle*>(particles.At(nkeep));
9e1a0ddb 342
343 // as the parent is always *before*, it must be already
344 // in place. This is what we are checking anyway!
345 if((parent=part->GetFirstMother())>fHgwmk)
346 if(map[parent]==-99) Fatal("PurifyKine","map[%d] = -99!\n",parent);
347 else part->SetFirstMother(map[parent]);
348
349 nkeep++;
350 }
351 }
352
353 // Fix daughters information
354 for (i=fHgwmk+1; i<nkeep; i++) {
e2afb3b6 355 part = dynamic_cast<TParticle*>(particles.At(i));
9e1a0ddb 356 parent = part->GetFirstMother();
357 if(parent>=0) {
e2afb3b6 358 father = dynamic_cast<TParticle*>(particles.At(parent));
9e1a0ddb 359 if(father->TestBit(kDaughtersBit)) {
360
361 if(i<father->GetFirstDaughter()) father->SetFirstDaughter(i);
362 if(i>father->GetLastDaughter()) father->SetLastDaughter(i);
363 } else {
364 // Initialise daughters info for first pass
365 father->SetFirstDaughter(i);
366 father->SetLastDaughter(i);
367 father->SetBit(kDaughtersBit);
368 }
369 }
370 }
371
372 // Now loop on all registered hit lists
5d12ce38 373 TList* hitLists = gAlice->GetMCApp()->GetHitLists();
9e1a0ddb 374 TIter next(hitLists);
375 TCollection *hitList;
6308b375 376
e2afb3b6 377 while((hitList = dynamic_cast<TCollection*>(next()))) {
9e1a0ddb 378 TIter nexthit(hitList);
379 AliHit *hit;
e2afb3b6 380 while((hit = dynamic_cast<AliHit*>(nexthit()))) {
6308b375 381 hit->SetTrack(map[hit->GetTrack()]);
9e1a0ddb 382 }
383 }
384
385 //
386 // This for detectors which have a special mapping mechanism
387 // for hits, such as TPC and TRD
388 //
2b22f272 389
9e1a0ddb 390 TObjArray* modules = gAlice->Modules();
391 TIter nextmod(modules);
392 AliModule *detector;
e2afb3b6 393 while((detector = dynamic_cast<AliModule*>(nextmod()))) {
9e1a0ddb 394 detector->RemapTrackHitIDs(map.GetArray());
ae9676e4 395 detector->RemapTrackReferencesIDs(map.GetArray());
9e1a0ddb 396 }
2b22f272 397 //
5d12ce38 398 gAlice->GetMCApp()->RemapTrackReferencesIDs(map.GetArray());
2b22f272 399
9e1a0ddb 400 // Now the output bit, from fHgwmk to nkeep we write everything and we erase
401 if(nkeep>fParticleFileMap.GetSize()) fParticleFileMap.Set(Int_t (nkeep*1.5));
402
403 for (i=fHgwmk+1; i<nkeep; ++i) {
e2afb3b6 404 fParticleBuffer = dynamic_cast<TParticle*>(particles.At(i));
88cb7938 405 fParticleFileMap[i]=static_cast<Int_t>(TreeK()->GetEntries());
406 TreeK()->Fill();
17f4a3d9 407 particles[i]=fParticleBuffer=0;
88cb7938 408 }
9e1a0ddb 409
410 for (i=nkeep; i<fNtrack; ++i) particles[i]=0;
411
76969085 412 Int_t toshrink = fNtrack-fHgwmk-1;
9e1a0ddb 413 fLoadPoint-=toshrink;
6308b375 414
415
9e1a0ddb 416 for(i=fLoadPoint; i<fLoadPoint+toshrink; ++i) fParticles->RemoveAt(i);
417
418 fNtrack=nkeep;
419 fHgwmk=nkeep-1;
6308b375 420}
421
422void AliStack::ReorderKine()
423{
424//
425// In some transport code children might not come in a continuous sequence.
426// In this case the stack has to be reordered in order to establish the
427// mother daughter relation using index ranges.
428//
429 if(fHgwmk+1 == fNtrack) return;
430
431 //
432 // Howmany secondaries have been produced ?
433 Int_t nNew = fNtrack - fHgwmk - 1;
434
435 if (nNew > 0) {
436 Int_t i, j;
437 TObjArray &particles = *fParticleMap;
438 TArrayI map1(nNew);
439 //
440 // Copy pointers to temporary array
441 TParticle** tmp = new TParticle*[nNew];
442
443 for (i = 0; i < nNew; i++) {
444 if (particles.At(fHgwmk + 1 + i)) {
445// tmp[i] = (TParticle*) (particles.At(fHgwmk + 1 + i))->Clone();
446 tmp[i] = (TParticle*) (particles.At(fHgwmk + 1 + i));
447
448// if (((TParticle*) (particles.At(fHgwmk + 1 + i)))->TestBit(kKeepBit))
449// tmp[i]->SetBit(kKeepBit);
450// if (((TParticle*) (particles.At(fHgwmk + 1 + i)))->TestBit(kDoneBit))
451// tmp[i]->SetBit(kDoneBit);
452 } else {
453 tmp[i] = 0x0;
454 }
455 map1[i] = -99;
456 }
457
458
459 //
460 // Reset LoadPoint
461 //
462 fLoadPoint = fHgwmk + 1;
463 //
464 // Re-Push particles into stack
465 // The outer loop is over parents, the inner over children.
466 // -1 refers to the primary particle
467 //
468 for (i = -1; i < nNew - 1; i++) {
469 Int_t ipa;
470 TParticle* parP;
471 if (i == -1) {
472 ipa = tmp[0]->GetFirstMother();
473 parP =dynamic_cast<TParticle*>(particles.At(ipa));
474 } else {
475 ipa = (fHgwmk + 1 + i);
476 // Skip deleted particles
477 if (!tmp[i]) continue;
478 // Skip particles without children
479 if (tmp[i]->GetFirstDaughter() == -1) continue;
480 parP = tmp[i];
481 }
482 // Reset daughter information
483 parP->SetFirstDaughter(-1);
484 parP->SetLastDaughter(-1);
485 for (j = i + 1; j < nNew; j++) {
486 // Skip deleted particles
487 if (!tmp[j]) continue;
488 // Skip particles already handled
489 if (map1[j] != -99) continue;
490 Int_t jpa = tmp[j]->GetFirstMother();
491 // Check if daughter of current parent
492 if (jpa == ipa) {
493 particles[fLoadPoint] = tmp[j];
494 // Re-establish daughter information
495 parP->SetLastDaughter(fLoadPoint);
496 if (parP->GetFirstDaughter() == -1) parP->SetFirstDaughter(fLoadPoint);
497 // Set Mother information
498 if (i != -1) {
499 tmp[j]->SetFirstMother(map1[i]);
500 }
501 // Build the map
502 map1[j] = fLoadPoint;
503 // Increase load point
504 fLoadPoint++;
505 }
506 } // children
507 } // parents
508
509 delete[] tmp;
510
511 //
512 // Build map for remapping of hits
513 //
514 TArrayI map(fNtrack);
515 for (i = 0; i < fNtrack; i ++) {
516 if (i <= fHgwmk) {
517 map[i] = i;
518 } else{
519 map[i] = map1[i - fHgwmk -1];
520 }
521 }
522
523 // Now loop on all registered hit lists
524
525 TList* hitLists = gAlice->GetMCApp()->GetHitLists();
526 TIter next(hitLists);
527 TCollection *hitList;
528
529 while((hitList = dynamic_cast<TCollection*>(next()))) {
530 TIter nexthit(hitList);
531 AliHit *hit;
532 while((hit = dynamic_cast<AliHit*>(nexthit()))) {
533 hit->SetTrack(map[hit->GetTrack()]);
534 }
535 }
536
537 //
538 // This for detectors which have a special mapping mechanism
539 // for hits, such as TPC and TRD
540 //
541
542 TObjArray* modules = gAlice->Modules();
543 TIter nextmod(modules);
544 AliModule *detector;
545 while((detector = dynamic_cast<AliModule*>(nextmod()))) {
546 detector->RemapTrackHitIDs(map.GetArray());
547 detector->RemapTrackReferencesIDs(map.GetArray());
548 }
549 gAlice->GetMCApp()->RemapTrackReferencesIDs(map.GetArray());
550 } // new particles poduced
9e1a0ddb 551}
552
e44c5340 553Bool_t AliStack::KeepPhysics(TParticle* part)
554{
555 //
556 // Some particles have to kept on the stack for reasons motivated
557 // by physics analysis. Decision is put here.
558 //
559 Bool_t keep = kFALSE;
560 //
561 // Keep first-generation daughter from primaries with heavy flavor
562 //
563 Int_t parent = part->GetFirstMother();
564 if (parent >= 0 && parent <= fHgwmk) {
e2afb3b6 565 TParticle* father = dynamic_cast<TParticle*>(Particles()->At(parent));
e44c5340 566 Int_t kf = father->GetPdgCode();
567 kf = TMath::Abs(kf);
568 Int_t kfl = kf;
569 // meson ?
570 if (kfl > 10) kfl/=100;
571 // baryon
572 if (kfl > 10) kfl/=10;
573 if (kfl > 10) kfl/=10;
574 if (kfl >= 4) {
575 keep = kTRUE;
576 }
577 }
578 return keep;
579}
580
9e1a0ddb 581//_____________________________________________________________________________
582void AliStack::FinishEvent()
583{
88cb7938 584//
585// Write out the kinematics that was not yet filled
586//
9e1a0ddb 587
88cb7938 588// Update event header
9e1a0ddb 589
590
88cb7938 591 if (!TreeK()) {
9e1a0ddb 592// Fatal("FinishEvent", "No kinematics tree is defined.");
593// Don't panic this is a probably a lego run
594 return;
9e1a0ddb 595 }
596
597 CleanParents();
88cb7938 598 if(TreeK()->GetEntries() ==0) {
9e1a0ddb 599 // set the fParticleFileMap size for the first time
600 fParticleFileMap.Set(fHgwmk+1);
601 }
602
603 Bool_t allFilled = kFALSE;
604 TObject *part;
605 for(Int_t i=0; i<fHgwmk+1; ++i)
606 if((part=fParticleMap->At(i))) {
e2afb3b6 607 fParticleBuffer = dynamic_cast<TParticle*>(part);
88cb7938 608 fParticleFileMap[i]= static_cast<Int_t>(TreeK()->GetEntries());
609 TreeK()->Fill();
da2af24c 610 //PH (*fParticleMap)[i]=fParticleBuffer=0;
611 fParticleBuffer=0;
612 fParticleMap->AddAt(0,i);
9e1a0ddb 613
614 // When all primaries were filled no particle!=0
615 // should be left => to be removed later.
21bf7095 616 if (allFilled) AliWarning(Form("Why != 0 part # %d?\n",i));
9e1a0ddb 617 }
88cb7938 618 else
619 {
9e1a0ddb 620 // // printf("Why = 0 part # %d?\n",i); => We know.
621 // break;
88cb7938 622 // we don't break now in order to be sure there is no
623 // particle !=0 left.
624 // To be removed later and replaced with break.
625 if(!allFilled) allFilled = kTRUE;
626 }
9e1a0ddb 627}
9e1a0ddb 628//_____________________________________________________________________________
88cb7938 629
9e1a0ddb 630void AliStack::FlagTrack(Int_t track)
631{
632 //
633 // Flags a track and all its family tree to be kept
634 //
635
636 TParticle *particle;
637
638 Int_t curr=track;
639 while(1) {
e2afb3b6 640 particle=dynamic_cast<TParticle*>(fParticleMap->At(curr));
9e1a0ddb 641
642 // If the particle is flagged the three from here upward is saved already
643 if(particle->TestBit(kKeepBit)) return;
644
645 // Save this particle
646 particle->SetBit(kKeepBit);
647
648 // Move to father if any
649 if((curr=particle->GetFirstMother())==-1) return;
650 }
651}
652
653//_____________________________________________________________________________
ed54bf31 654void AliStack::KeepTrack(Int_t track)
9e1a0ddb 655{
656 //
657 // Flags a track to be kept
658 //
659
660 fParticleMap->At(track)->SetBit(kKeepBit);
661}
662
663//_____________________________________________________________________________
664void AliStack::Reset(Int_t size)
665{
666 //
667 // Resets stack
668 //
88cb7938 669
9e1a0ddb 670 fNtrack=0;
671 fNprimary=0;
672 fHgwmk=0;
673 fLoadPoint=0;
674 fCurrent = -1;
88cb7938 675 fTreeK = 0x0;
9e1a0ddb 676 ResetArrays(size);
677}
678
679//_____________________________________________________________________________
680void AliStack::ResetArrays(Int_t size)
681{
682 //
683 // Resets stack arrays
684 //
685
be3380a3 686 if (fParticles)
687 fParticles->Clear();
688 else
689 fParticles = new TClonesArray("TParticle",1000);
690 if (fParticleMap) {
691 fParticleMap->Clear();
692 if (size>0) fParticleMap->Expand(size);}
693 else
694 fParticleMap = new TObjArray(size);
9e1a0ddb 695}
696
697//_____________________________________________________________________________
e2afb3b6 698void AliStack::SetHighWaterMark(Int_t)
9e1a0ddb 699{
700 //
701 // Set high water mark for last track in event
702 //
6308b375 703
704
9e1a0ddb 705 fHgwmk = fNtrack-1;
706 fCurrentPrimary=fHgwmk;
9e1a0ddb 707 // Set also number of primary tracks
708 fNprimary = fHgwmk+1;
709 fNtrack = fHgwmk+1;
710}
711
712//_____________________________________________________________________________
713TParticle* AliStack::Particle(Int_t i)
714{
715 //
716 // Return particle with specified ID
717
da2af24c 718 //PH if(!(*fParticleMap)[i]) {
719 if(!fParticleMap->At(i)) {
911a3148 720 Int_t nentries = fParticles->GetEntriesFast();
9e1a0ddb 721 // algorithmic way of getting entry index
722 // (primary particles are filled after secondaries)
e94530da 723 Int_t entry = TreeKEntry(i);
9e1a0ddb 724 // check whether algorithmic way and
725 // and the fParticleFileMap[i] give the same;
726 // give the fatal error if not
727 if (entry != fParticleFileMap[i]) {
21bf7095 728 AliFatal(Form(
9e1a0ddb 729 "!! The algorithmic way and map are different: !!\n entry: %d map: %d",
21bf7095 730 entry, fParticleFileMap[i]));
9e1a0ddb 731 }
732
88cb7938 733 TreeK()->GetEntry(entry);
9e1a0ddb 734 new ((*fParticles)[nentries]) TParticle(*fParticleBuffer);
735 fParticleMap->AddAt((*fParticles)[nentries],i);
736 }
e2afb3b6 737 //PH return dynamic_cast<TParticle *>((*fParticleMap)[i]);
738 return dynamic_cast<TParticle*>(fParticleMap->At(i));
9e1a0ddb 739}
740
741//_____________________________________________________________________________
e94530da 742TParticle* AliStack::ParticleFromTreeK(Int_t id) const
743{
744//
745// return pointer to TParticle with label id
746//
747 Int_t entry;
748 if ((entry = TreeKEntry(id)) < 0) return 0;
749 if (fTreeK->GetEntry(entry)<=0) return 0;
750 return fParticleBuffer;
751}
752
753//_____________________________________________________________________________
754Int_t AliStack::TreeKEntry(Int_t id) const
755{
756//
757// return entry number in the TreeK for particle with label id
758// return negative number if label>fNtrack
759//
760 Int_t entry;
761 if (id<fNprimary)
762 entry = id+fNtrack-fNprimary;
763 else
764 entry = id-fNprimary;
765 return entry;
766}
767
768//_____________________________________________________________________________
642f15cf 769Int_t AliStack::GetCurrentParentTrackNumber() const
5d8718b8 770{
771 //
772 // Return number of the parent of the current track
773 //
774
775 TParticle* current = (TParticle*)fParticleMap->At(fCurrent);
776
777 if (current)
778 return current->GetFirstMother();
779 else {
21bf7095 780 AliWarning("Current track not found in the stack");
5d8718b8 781 return -1;
782 }
783}
784
785//_____________________________________________________________________________
f5f55563 786Int_t AliStack::GetPrimary(Int_t id)
9e1a0ddb 787{
788 //
789 // Return number of primary that has generated track
790 //
791
792 int current, parent;
9e1a0ddb 793 //
794 parent=id;
795 while (1) {
796 current=parent;
f5f55563 797 parent=Particle(current)->GetFirstMother();
9e1a0ddb 798 if(parent<0) return current;
799 }
800}
801
802//_____________________________________________________________________________
803void AliStack::DumpPart (Int_t i) const
804{
805 //
806 // Dumps particle i in the stack
807 //
808
e2afb3b6 809 //PH dynamic_cast<TParticle*>((*fParticleMap)[i])->Print();
810 dynamic_cast<TParticle*>(fParticleMap->At(i))->Print();
9e1a0ddb 811}
812
813//_____________________________________________________________________________
814void AliStack::DumpPStack ()
815{
816 //
817 // Dumps the particle stack
818 //
819
3ab6f951 820 Int_t i;
821
88cb7938 822 printf("\n\n=======================================================================\n");
3ab6f951 823 for (i=0;i<fNtrack;i++)
9e1a0ddb 824 {
825 TParticle* particle = Particle(i);
826 if (particle) {
827 printf("-> %d ",i); particle->Print();
828 printf("--------------------------------------------------------------\n");
829 }
830 else
831 Warning("DumpPStack", "No particle with id %d.", i);
832 }
833
88cb7938 834 printf("\n=======================================================================\n\n");
9e1a0ddb 835
836 // print particle file map
837 printf("\nParticle file map: \n");
3ab6f951 838 for (i=0; i<fNtrack; i++)
9e1a0ddb 839 printf(" %d th entry: %d \n",i,fParticleFileMap[i]);
840}
841
842
843//_____________________________________________________________________________
844void AliStack::DumpLoadedStack() const
845{
846 //
847 // Dumps the particle in the stack
848 // that are loaded in memory.
849 //
850
851 TObjArray &particles = *fParticleMap;
852 printf(
853 "\n\n=======================================================================\n");
854 for (Int_t i=0;i<fNtrack;i++)
855 {
e2afb3b6 856 TParticle* particle = dynamic_cast<TParticle*>(particles[i]);
9e1a0ddb 857 if (particle) {
858 printf("-> %d ",i); particle->Print();
859 printf("--------------------------------------------------------------\n");
860 }
861 else {
862 printf("-> %d Particle not loaded.\n",i);
863 printf("--------------------------------------------------------------\n");
864 }
865 }
866 printf(
867 "\n=======================================================================\n\n");
868}
869
870//
871// protected methods
872//
873
874//_____________________________________________________________________________
875void AliStack::CleanParents()
876{
877 //
878 // Clean particles stack
879 // Set parent/daughter relations
880 //
881
882 TObjArray &particles = *fParticleMap;
883 TParticle *part;
884 int i;
885 for(i=0; i<fHgwmk+1; i++) {
e2afb3b6 886 part = dynamic_cast<TParticle*>(particles.At(i));
9e1a0ddb 887 if(part) if(!part->TestBit(kDaughtersBit)) {
888 part->SetFirstDaughter(-1);
889 part->SetLastDaughter(-1);
890 }
891 }
892}
893
894//_____________________________________________________________________________
895TParticle* AliStack::GetNextParticle()
896{
897 //
898 // Return next particle from stack of particles
899 //
900
901 TParticle* particle = 0;
902
903 // search secondaries
904 //for(Int_t i=fNtrack-1; i>=0; i--) {
905 for(Int_t i=fNtrack-1; i>fHgwmk; i--) {
e2afb3b6 906 particle = dynamic_cast<TParticle*>(fParticleMap->At(i));
9e1a0ddb 907 if ((particle) && (!particle->TestBit(kDoneBit))) {
908 fCurrent=i;
9e1a0ddb 909 return particle;
910 }
911 }
912
913 // take next primary if all secondaries were done
914 while (fCurrentPrimary>=0) {
915 fCurrent = fCurrentPrimary;
e2afb3b6 916 particle = dynamic_cast<TParticle*>(fParticleMap->At(fCurrentPrimary--));
9e1a0ddb 917 if ((particle) && (!particle->TestBit(kDoneBit))) {
9e1a0ddb 918 return particle;
919 }
920 }
921
922 // nothing to be tracked
923 fCurrent = -1;
6308b375 924
925
9e1a0ddb 926 return particle;
927}
88cb7938 928//__________________________________________________________________________________________
9e1a0ddb 929
88cb7938 930TTree* AliStack::TreeK()
931{
932//returns TreeK
933 if (fTreeK)
934 {
935 return fTreeK;
936 }
937 else
938 {
939 AliRunLoader *rl = AliRunLoader::GetRunLoader(fEventFolderName);
940 if (rl == 0x0)
941 {
21bf7095 942 AliFatal(Form("Can not get RunLoader from event folder named %s",fEventFolderName.Data()));
88cb7938 943 return 0x0;//pro forma
944 }
945 fTreeK = rl->TreeK();
504b172d 946 if ( fTreeK )
88cb7938 947 {
504b172d 948 ConnectTree();
88cb7938 949 }
950 else
951 {
504b172d 952 //don't panic - could be Lego
21bf7095 953 AliWarning(Form("Can not get TreeK from RL. Ev. Folder is %s",fEventFolderName.Data()));
88cb7938 954 }
955 }
956 return fTreeK;//never reached
957}
9e1a0ddb 958//__________________________________________________________________________________________
88cb7938 959
960void AliStack::ConnectTree()
9e1a0ddb 961{
962//
88cb7938 963// Creates branch for writing particles
964//
21bf7095 965 AliDebug(1, "Connecting TreeK");
88cb7938 966 if (fTreeK == 0x0)
967 {
968 if (TreeK() == 0x0)
969 {
21bf7095 970 AliFatal("Parameter is NULL");//we don't like such a jokes
88cb7938 971 return;
972 }
973 return;//in this case TreeK() calls back this method (ConnectTree)
974 //tree after setting fTreeK, the rest was already executed
975 //it is safe to return now
976 }
977
978 // Create a branch for particles
979
21bf7095 980 AliDebug(2, Form("Tree name is %s",fTreeK->GetName()));
88cb7938 981
982 if (fTreeK->GetDirectory())
983 {
21bf7095 984 AliDebug(2, Form("and dir is %s",fTreeK->GetDirectory()->GetName()));
88cb7938 985 }
986 else
21bf7095 987 AliWarning("DIR IS NOT SET !!!");
88cb7938 988
024a7e64 989 TBranch *branch=fTreeK->GetBranch(AliRunLoader::GetKineBranchName());
88cb7938 990 if(branch == 0x0)
991 {
024a7e64 992 branch = fTreeK->Branch(AliRunLoader::GetKineBranchName(), "TParticle", &fParticleBuffer, 4000);
21bf7095 993 AliDebug(2, "Creating Branch in Tree");
88cb7938 994 }
995 else
996 {
21bf7095 997 AliDebug(2, "Branch Found in Tree");
88cb7938 998 branch->SetAddress(&fParticleBuffer);
999 }
1000 if (branch->GetDirectory())
1001 {
21bf7095 1002 AliDebug(1, Form("Branch Dir Name is %s",branch->GetDirectory()->GetName()));
88cb7938 1003 }
1004 else
21bf7095 1005 AliWarning("Branch Dir is NOT SET");
9e1a0ddb 1006}
88cb7938 1007//__________________________________________________________________________________________
9e1a0ddb 1008
88cb7938 1009
1010void AliStack::BeginEvent()
9e1a0ddb 1011{
1012// start a new event
88cb7938 1013 Reset();
9e1a0ddb 1014}
1015
81694e6a 1016//_____________________________________________________________________________
9e1a0ddb 1017void AliStack::FinishRun()
1018{
1019// Clean TreeK information
9e1a0ddb 1020}
5d8718b8 1021//_____________________________________________________________________________
88cb7938 1022
1023Bool_t AliStack::GetEvent()
9e1a0ddb 1024{
1025//
1026// Get new event from TreeK
ccf7a81f 1027
9e1a0ddb 1028 // Reset/Create the particle stack
88cb7938 1029 fTreeK = 0x0;
9e1a0ddb 1030
88cb7938 1031 if (TreeK() == 0x0) //forces connecting
1032 {
21bf7095 1033 AliError("cannot find Kine Tree for current event");
ccf7a81f 1034 return kFALSE;
88cb7938 1035 }
ccf7a81f 1036
88cb7938 1037 Int_t size = (Int_t)TreeK()->GetEntries();
9e1a0ddb 1038 ResetArrays(size);
ccf7a81f 1039 return kTRUE;
9e1a0ddb 1040}
88cb7938 1041//_____________________________________________________________________________
1042
1043void AliStack::SetEventFolderName(const char* foldname)
1044{
1045 //Sets event folder name
1046 fEventFolderName = foldname;
1047}