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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
16/* $Id$ */
17
18// This class is extracted from the AliRun class
19// and contains all the MC-related functionality
20// The number of dependencies has to be reduced...
21// Author: F.Carminati
22// Federico.Carminati@cern.ch
23
24#include <string.h>
25
26#include <RVersion.h>
27#include <TArrayI.h>
28#include <TClonesArray.h>
29#include <TFile.h>
30#include <TGeoGlobalMagField.h>
31#include <TGeoManager.h>
32#include <TParticle.h>
33#include <TROOT.h>
34#include <TStopwatch.h>
35#include <TSystem.h>
36#include <TVirtualMC.h>
37
38#include "AliCDBEntry.h"
39#include "AliCDBManager.h"
40#include "AliCDBStorage.h"
41#include "AliDetector.h"
42#include "AliGenerator.h"
43#include "AliGeomManager.h"
44#include "AliHeader.h"
45#include "AliHit.h"
46#include "AliLego.h"
47#include "AliLog.h"
48#include "AliMC.h"
49#include "AliMagF.h"
50#include "AliRun.h"
51#include "AliSimulation.h"
52#include "AliStack.h"
53#include "AliTrackReference.h"
54
55ClassImp(AliMC)
56
57//_______________________________________________________________________
58AliMC::AliMC() :
59 fGenerator(0),
60 fEventEnergy(0),
61 fSummEnergy(0),
62 fSum2Energy(0),
63 fTrRmax(1.e10),
64 fTrZmax(1.e10),
65 fRDecayMax(1.e10),
66 fRDecayMin(-1.),
67 fDecayPdg(0),
68 fImedia(0),
69 fTransParName("\0"),
70 fHitLists(0),
71 fTmpTreeTR(0),
72 fTmpFileTR(0),
73 fTrackReferences(),
74 fTmpTrackReferences()
75
76{
77 //default constructor
78 DecayLimits();
79}
80
81//_______________________________________________________________________
82AliMC::AliMC(const char *name, const char *title) :
83 TVirtualMCApplication(name, title),
84 fGenerator(0),
85 fEventEnergy(0),
86 fSummEnergy(0),
87 fSum2Energy(0),
88 fTrRmax(1.e10),
89 fTrZmax(1.e10),
90 fRDecayMax(1.e10),
91 fRDecayMin(-1.),
92 fDecayPdg(0),
93 fImedia(new TArrayI(1000)),
94 fTransParName("\0"),
95 fHitLists(new TList()),
96 fTmpTreeTR(0),
97 fTmpFileTR(0),
98 fTrackReferences("AliTrackReference", 100),
99 fTmpTrackReferences("AliTrackReference", 100)
100{
101 //constructor
102 // Set transport parameters
103 SetTransPar();
104 DecayLimits();
105 // Prepare the tracking medium lists
106 for(Int_t i=0;i<1000;i++) (*fImedia)[i]=-99;
107}
108
109//_______________________________________________________________________
110AliMC::~AliMC()
111{
112 //destructor
113 delete fGenerator;
114 delete fImedia;
115 delete fHitLists;
116 // Delete track references
117}
118
119//_______________________________________________________________________
120void AliMC::ConstructGeometry()
121{
122 //
123 // Either load geometry from file or create it through usual
124 // loop on detectors. In the first case the method
125 // AliModule::CreateMaterials() only builds fIdtmed and is postponed
126 // at InitGeometry().
127 //
128
129 if(AliSimulation::Instance()->IsGeometryFromFile()){ //load geometry either from CDB or from file
130 if(IsGeometryFromCDB()){
131 AliInfo("Loading geometry from CDB default storage");
132 AliCDBPath path("GRP","Geometry","Data");
133 AliCDBEntry *entry=AliCDBManager::Instance()->Get(path.GetPath());
134 if(!entry) AliFatal("Unable to load geometry from CDB!");
135 entry->SetOwner(0);
136 gGeoManager = (TGeoManager*) entry->GetObject();
137 if (!gGeoManager) AliFatal("TGeoManager object not found in the specified CDB entry!");
138 }else{
139 // Load geometry
140 const char *geomfilename = AliSimulation::Instance()->GetGeometryFile();
141 if(gSystem->ExpandPathName(geomfilename)){
142 AliInfo(Form("Loading geometry from file:\n %40s",geomfilename));
143 TGeoManager::Import(geomfilename);
144 }else{
145 AliInfo(Form("Geometry file %40s not found!\n",geomfilename));
146 return;
147 }
148 }
149 gMC->SetRootGeometry();
150 }else{
151 // Create modules, materials, geometry
152 if (!gGeoManager) new TGeoManager("ALICE", "ALICE geometry");
153 TStopwatch stw;
154 TIter next(gAlice->Modules());
155 AliModule *detector;
156 AliDebug(1, "Geometry creation:");
157 while((detector = dynamic_cast<AliModule*>(next()))) {
158 stw.Start();
159 // Initialise detector materials and geometry
160 detector->CreateMaterials();
161 detector->CreateGeometry();
162 AliInfo(Form("%10s R:%.2fs C:%.2fs",
163 detector->GetName(),stw.RealTime(),stw.CpuTime()));
164 }
165 }
166
167}
168
169//_______________________________________________________________________
170Bool_t AliMC::MisalignGeometry()
171{
172 // Call misalignment code if AliSimulation object was defined.
173
174 if(!AliSimulation::Instance()->IsGeometryFromFile()){
175 //Set alignable volumes for the whole geometry
176 SetAllAlignableVolumes();
177 }
178 // Misalign geometry via AliSimulation instance
179 if (!AliSimulation::Instance()) return kFALSE;
180 AliGeomManager::SetGeometry(gGeoManager);
181 if(!AliGeomManager::CheckSymNamesLUT("ALL"))
182 AliFatal("Current loaded geometry differs in the definition of symbolic names!");
183
184 return AliSimulation::Instance()->MisalignGeometry(AliRunLoader::Instance());
185}
186
187//_______________________________________________________________________
188void AliMC::ConstructOpGeometry()
189{
190 //
191 // Loop all detector modules and call DefineOpticalProperties() method
192 //
193
194 TIter next(gAlice->Modules());
195 AliModule *detector;
196 AliInfo("Optical properties definition");
197 while((detector = dynamic_cast<AliModule*>(next()))) {
198 // Initialise detector geometry
199 if(AliSimulation::Instance()->IsGeometryFromFile()) detector->CreateMaterials();
200 // Initialise detector optical properties
201 detector->DefineOpticalProperties();
202 }
203}
204
205//_______________________________________________________________________
206void AliMC::InitGeometry()
207{
208 //
209 // Initialize detectors
210 //
211
212 AliInfo("Initialisation:");
213 TStopwatch stw;
214 TIter next(gAlice->Modules());
215 AliModule *detector;
216 while((detector = dynamic_cast<AliModule*>(next()))) {
217 stw.Start();
218 detector->Init();
219 AliInfo(Form("%10s R:%.2fs C:%.2fs",
220 detector->GetName(),stw.RealTime(),stw.CpuTime()));
221 }
222}
223
224//_______________________________________________________________________
225void AliMC::SetGeometryFromCDB()
226{
227 // Set the loading of geometry from cdb instead of creating it
228 // A default CDB storage needs to be set before this method is called
229 if(AliCDBManager::Instance()->IsDefaultStorageSet() &&
230 AliCDBManager::Instance()->GetRun() >= 0)
231 AliSimulation::Instance()->SetGeometryFile("*OCDB*");
232 else
233 AliError("Loading of geometry from CDB ignored. First set a default CDB storage!");
234}
235
236//_______________________________________________________________________
237Bool_t AliMC::IsGeometryFromCDB() const
238{
239 return (strcmp(AliSimulation::Instance()->GetGeometryFile(),"*OCDB*")==0);
240}
241
242//_______________________________________________________________________
243void AliMC::SetAllAlignableVolumes()
244{
245 //
246 // Add alignable volumes (TGeoPNEntries) looping on all
247 // active modules
248 //
249
250 AliInfo(Form("Setting entries for all alignable volumes of active detectors"));
251 AliModule *detector;
252 TIter next(gAlice->Modules());
253 while((detector = dynamic_cast<AliModule*>(next()))) {
254 detector->AddAlignableVolumes();
255 }
256}
257
258//_______________________________________________________________________
259void AliMC::GeneratePrimaries()
260{
261 //
262 // Generate primary particles and fill them in the stack.
263 //
264
265 Generator()->Generate();
266}
267
268//_______________________________________________________________________
269void AliMC::SetGenerator(AliGenerator *generator)
270{
271 //
272 // Load the event generator
273 //
274 if(!fGenerator) fGenerator = generator;
275}
276
277//_______________________________________________________________________
278void AliMC::ResetGenerator(AliGenerator *generator)
279{
280 //
281 // Load the event generator
282 //
283 if(fGenerator) {
284 if(generator) {
285 AliWarning(Form("Replacing generator %s with %s",
286 fGenerator->GetName(),generator->GetName()));
287 }
288 else {
289 AliWarning(Form("Replacing generator %s with NULL",
290 fGenerator->GetName()));
291 }
292 }
293 fGenerator = generator;
294}
295
296//_______________________________________________________________________
297void AliMC::FinishRun()
298{
299 // Clean generator information
300 AliDebug(1, "fGenerator->FinishRun()");
301 fGenerator->FinishRun();
302
303 //Output energy summary tables
304 AliDebug(1, "EnergySummary()");
305 ToAliDebug(1, EnergySummary());
306}
307
308//_______________________________________________________________________
309void AliMC::BeginPrimary()
310{
311 //
312 // Called at the beginning of each primary track
313 //
314
315 // Reset Hits info
316 ResetHits();
317 ResetTrackReferences();
318}
319
320//_______________________________________________________________________
321void AliMC::PreTrack()
322{
323 // Actions before the track's transport
324
325 TObjArray &dets = *gAlice->Modules();
326 AliModule *module;
327
328 for(Int_t i=0; i<=gAlice->GetNdets(); i++)
329 if((module = dynamic_cast<AliModule*>(dets[i])))
330 module->PreTrack();
331}
332
333//_______________________________________________________________________
334void AliMC::Stepping()
335{
336 //
337 // Called at every step during transport
338 //
339 Int_t id = DetFromMate(gMC->CurrentMedium());
340 if (id < 0) return;
341
342
343 if ( gMC->IsNewTrack() &&
344 gMC->TrackTime() == 0. &&
345 fRDecayMin >= 0. &&
346 fRDecayMax > fRDecayMin &&
347 gMC->TrackPid() == fDecayPdg )
348 {
349 FixParticleDecaytime();
350 }
351
352
353
354 //
355 // --- If lego option, do it and leave
356 if (AliSimulation::Instance()->Lego())
357 AliSimulation::Instance()->Lego()->StepManager();
358 else {
359 Int_t copy;
360 //Update energy deposition tables
361 AddEnergyDeposit(gMC->CurrentVolID(copy),gMC->Edep());
362 //
363 // write tracke reference for track which is dissapearing - MI
364
365 if (gMC->IsTrackDisappeared() && !(gMC->IsTrackAlive())) {
366 if (gMC->Etot() > 0.05) AddTrackReference(GetCurrentTrackNumber(),
367 AliTrackReference::kDisappeared);
368
369
370 }
371
372 //Call the appropriate stepping routine;
373 AliModule *det = dynamic_cast<AliModule*>(gAlice->Modules()->At(id));
374 if(det && det->StepManagerIsEnabled()) {
375 det->StepManager();
376 }
377 }
378}
379
380//_______________________________________________________________________
381void AliMC::EnergySummary()
382{
383 //e
384 // Print summary of deposited energy
385 //
386
387 Int_t ndep=0;
388 Float_t edtot=0;
389 Float_t ed, ed2;
390 Int_t kn, i, left, j, id;
391 const Float_t kzero=0;
392 Int_t ievent=AliRunLoader::Instance()->GetHeader()->GetEvent()+1;
393 //
394 // Energy loss information
395 if(ievent) {
396 printf("***************** Energy Loss Information per event (GEV) *****************\n");
397 for(kn=1;kn<fEventEnergy.GetSize();kn++) {
398 ed=fSummEnergy[kn];
399 if(ed>0) {
400 fEventEnergy[ndep]=kn;
401 if(ievent>1) {
402 ed=ed/ievent;
403 ed2=fSum2Energy[kn];
404 ed2=ed2/ievent;
405 ed2=100*TMath::Sqrt(TMath::Max(ed2-ed*ed,kzero))/ed;
406 } else
407 ed2=99;
408 fSummEnergy[ndep]=ed;
409 fSum2Energy[ndep]=TMath::Min(static_cast<Float_t>(99.),TMath::Max(ed2,kzero));
410 edtot+=ed;
411 ndep++;
412 }
413 }
414 for(kn=0;kn<(ndep-1)/3+1;kn++) {
415 left=ndep-kn*3;
416 for(i=0;i<(3<left?3:left);i++) {
417 j=kn*3+i;
418 id=Int_t (fEventEnergy[j]+0.1);
419 printf(" %s %10.3f +- %10.3f%%;",gMC->VolName(id),fSummEnergy[j],fSum2Energy[j]);
420 }
421 printf("\n");
422 }
423 //
424 // Relative energy loss in different detectors
425 printf("******************** Relative Energy Loss per event ********************\n");
426 printf("Total energy loss per event %10.3f GeV\n",edtot);
427 for(kn=0;kn<(ndep-1)/5+1;kn++) {
428 left=ndep-kn*5;
429 for(i=0;i<(5<left?5:left);i++) {
430 j=kn*5+i;
431 id=Int_t (fEventEnergy[j]+0.1);
432 printf(" %s %10.3f%%;",gMC->VolName(id),100*fSummEnergy[j]/edtot);
433 }
434 printf("\n");
435 }
436 for(kn=0;kn<75;kn++) printf("*");
437 printf("\n");
438 }
439 //
440 // Reset the TArray's
441 // fEventEnergy.Set(0);
442 // fSummEnergy.Set(0);
443 // fSum2Energy.Set(0);
444}
445
446//_____________________________________________________________________________
447void AliMC::BeginEvent()
448{
449 //
450 // Clean-up previous event
451 // Energy scores
452 AliDebug(1, ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
453 AliDebug(1, ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
454 AliDebug(1, ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
455 AliDebug(1, " BEGINNING EVENT ");
456 AliDebug(1, ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
457 AliDebug(1, ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
458 AliDebug(1, ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
459
460 AliRunLoader *runloader=AliRunLoader::Instance();
461
462 /*******************************/
463 /* Clean after eventual */
464 /* previous event */
465 /*******************************/
466
467
468 //Set the next event in Run Loader -> Cleans trees (TreeK and all trees in detectors),
469 gAlice->SetEventNrInRun(gAlice->GetEventNrInRun()+1);
470 runloader->SetEventNumber(gAlice->GetEventNrInRun());// sets new files, cleans the previous event stuff, if necessary, etc.,
471 AliDebug(1, Form("EventNr is %d",gAlice->GetEventNrInRun()));
472
473 fEventEnergy.Reset();
474 // Clean detector information
475
476 if (runloader->Stack())
477 runloader->Stack()->Reset();//clean stack -> tree is unloaded
478 else
479 runloader->MakeStack();//or make a new one
480
481
482 if(AliSimulation::Instance()->Lego() == 0x0)
483 {
484 AliDebug(1, "fRunLoader->MakeTree(K)");
485 runloader->MakeTree("K");
486 }
487
488 AliDebug(1, "gMC->SetStack(fRunLoader->Stack())");
489 gMC->SetStack(runloader->Stack());//Was in InitMC - but was moved here
490 //because we don't have guarantee that
491 //stack pointer is not going to change from event to event
492 //since it bellobgs to header and is obtained via RunLoader
493 //
494 // Reset all Detectors & kinematics & make/reset trees
495 //
496
497 runloader->GetHeader()->Reset(AliCDBManager::Instance()->GetRun(),gAlice->GetEvNumber(),
498 gAlice->GetEventNrInRun());
499// fRunLoader->WriteKinematics("OVERWRITE"); is there any reason to rewrite here since MakeTree does so
500
501 if(AliSimulation::Instance()->Lego())
502 {
503 AliSimulation::Instance()->Lego()->BeginEvent();
504 return;
505 }
506
507
508 AliDebug(1, "ResetHits()");
509 ResetHits();
510
511 AliDebug(1, "fRunLoader->MakeTree(H)");
512 runloader->MakeTree("H");
513
514
515
516 MakeTmpTrackRefsTree();
517 //create new branches and SetAdresses
518 TIter next(gAlice->Modules());
519 AliModule *detector;
520 while((detector = (AliModule*)next()))
521 {
522 AliDebug(2, Form("%s->MakeBranch(H)",detector->GetName()));
523 detector->MakeBranch("H");
524 }
525}
526
527//_______________________________________________________________________
528void AliMC::ResetHits()
529{
530 //
531 // Reset all Detectors hits
532 //
533 TIter next(gAlice->Modules());
534 AliModule *detector;
535 while((detector = dynamic_cast<AliModule*>(next()))) {
536 detector->ResetHits();
537 }
538}
539
540//_______________________________________________________________________
541void AliMC::ResetDigits()
542{
543 //
544 // Reset all Detectors digits
545 //
546 TIter next(gAlice->Modules());
547 AliModule *detector;
548 while((detector = dynamic_cast<AliModule*>(next()))) {
549 detector->ResetDigits();
550 }
551}
552
553//_______________________________________________________________________
554void AliMC::ResetSDigits()
555{
556 //
557 // Reset all Detectors digits
558 //
559 TIter next(gAlice->Modules());
560 AliModule *detector;
561 while((detector = dynamic_cast<AliModule*>(next()))) {
562 detector->ResetSDigits();
563 }
564}
565
566//_______________________________________________________________________
567void AliMC::PostTrack()
568{
569 // Posts tracks for each module
570
571 TObjArray &dets = *gAlice->Modules();
572 AliModule *module;
573
574 for(Int_t i=0; i<=gAlice->GetNdets(); i++)
575 if((module = dynamic_cast<AliModule*>(dets[i])))
576 module->PostTrack();
577}
578
579//_______________________________________________________________________
580void AliMC::FinishPrimary()
581{
582 //
583 // Called at the end of each primary track
584 //
585
586 AliRunLoader *runloader=AliRunLoader::Instance();
587 // static Int_t count=0;
588 // const Int_t times=10;
589 // This primary is finished, purify stack
590#if ROOT_VERSION_CODE > 262152
591 if (!(gMC->SecondariesAreOrdered())) {
592 if (runloader->Stack()->ReorderKine()) RemapHits();
593 }
594#endif
595 if (runloader->Stack()->PurifyKine()) RemapHits();
596
597 TIter next(gAlice->Modules());
598 AliModule *detector;
599 while((detector = dynamic_cast<AliModule*>(next()))) {
600 detector->FinishPrimary();
601 AliLoader* loader = detector->GetLoader();
602 if(loader)
603 {
604 TTree* treeH = loader->TreeH();
605 if (treeH) treeH->Fill(); //can be Lego run and treeH can not exist
606 }
607 }
608
609 // Write out track references if any
610 if (fTmpTreeTR) fTmpTreeTR->Fill();
611}
612
613void AliMC::RemapHits()
614{
615//
616// Remaps the track labels of the hits
617 AliRunLoader *runloader=AliRunLoader::Instance();
618 AliStack* stack = runloader->Stack();
619 TList* hitLists = GetHitLists();
620 TIter next(hitLists);
621 TCollection *hitList;
622
623 while((hitList = dynamic_cast<TCollection*>(next()))) {
624 TIter nexthit(hitList);
625 AliHit *hit;
626 while((hit = dynamic_cast<AliHit*>(nexthit()))) {
627 hit->SetTrack(stack->TrackLabel(hit->GetTrack()));
628 }
629 }
630
631 //
632 // This for detectors which have a special mapping mechanism
633 // for hits, such as TPC and TRD
634 //
635
636
637 TObjArray* modules = gAlice->Modules();
638 TIter nextmod(modules);
639 AliModule *module;
640 while((module = (AliModule*) nextmod())) {
641 AliDetector* det = dynamic_cast<AliDetector*> (module);
642 if (det) det->RemapTrackHitIDs(stack->TrackLabelMap());
643 }
644 //
645 RemapTrackReferencesIDs(stack->TrackLabelMap());
646}
647
648//_______________________________________________________________________
649void AliMC::FinishEvent()
650{
651 //
652 // Called at the end of the event.
653 //
654
655 if(AliSimulation::Instance()->Lego()) AliSimulation::Instance()->Lego()->FinishEvent();
656
657 TIter next(gAlice->Modules());
658 AliModule *detector;
659 while((detector = dynamic_cast<AliModule*>(next()))) {
660 detector->FinishEvent();
661 }
662
663 //Update the energy deposit tables
664 Int_t i;
665 for(i=0;i<fEventEnergy.GetSize();i++)
666 {
667 fSummEnergy[i]+=fEventEnergy[i];
668 fSum2Energy[i]+=fEventEnergy[i]*fEventEnergy[i];
669 }
670
671 AliRunLoader *runloader=AliRunLoader::Instance();
672
673 AliHeader* header = runloader->GetHeader();
674 AliStack* stack = runloader->Stack();
675 if ( (header == 0x0) || (stack == 0x0) )
676 {//check if we got header and stack. If not cry and exit aliroot
677 AliFatal("Can not get the stack or header from LOADER");
678 return;//never reached
679 }
680 // Update Header information
681 header->SetNprimary(stack->GetNprimary());
682 header->SetNtrack(stack->GetNtrack());
683
684 // Write out the kinematics
685 if (!AliSimulation::Instance()->Lego()) stack->FinishEvent();
686
687 // Synchronize the TreeTR with TreeK
688 if (fTmpTreeTR) ReorderAndExpandTreeTR();
689
690 // Write out the event Header information
691 TTree* treeE = runloader->TreeE();
692 if (treeE)
693 {
694 header->SetStack(stack);
695 treeE->Fill();
696 }
697 else
698 {
699 AliError("Can not get TreeE from RL");
700 }
701
702 if(AliSimulation::Instance()->Lego() == 0x0)
703 {
704 runloader->WriteKinematics("OVERWRITE");
705 runloader->WriteTrackRefs("OVERWRITE");
706 runloader->WriteHits("OVERWRITE");
707 }
708
709 AliDebug(1, "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
710 AliDebug(1, "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
711 AliDebug(1, "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
712 AliDebug(1, " FINISHING EVENT ");
713 AliDebug(1, "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
714 AliDebug(1, "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
715 AliDebug(1, "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
716}
717
718//_______________________________________________________________________
719void AliMC::Init()
720{
721 // MC initialization
722
723 //=================Create Materials and geometry
724 gMC->Init();
725 // Set alignable volumes for the whole geometry (with old root)
726#if ROOT_VERSION_CODE < 331527
727 SetAllAlignableVolumes();
728#endif
729 //Read the cuts for all materials
730 ReadTransPar();
731 //Build the special IMEDIA table
732 MediaTable();
733
734 //Compute cross-sections
735 gMC->BuildPhysics();
736
737 //Initialise geometry deposition table
738 fEventEnergy.Set(gMC->NofVolumes()+1);
739 fSummEnergy.Set(gMC->NofVolumes()+1);
740 fSum2Energy.Set(gMC->NofVolumes()+1);
741
742 // Register MC in configuration
743 AliConfig::Instance()->Add(gMC);
744
745}
746
747//_______________________________________________________________________
748void AliMC::MediaTable()
749{
750 //
751 // Built media table to get from the media number to
752 // the detector id
753 //
754
755 Int_t kz, nz, idt, lz, i, k, ind;
756 // Int_t ibeg;
757 TObjArray &dets = *gAlice->Detectors();
758 AliModule *det;
759 Int_t ndets=gAlice->GetNdets();
760 //
761 // For all detectors
762 for (kz=0;kz<ndets;kz++) {
763 // If detector is defined
764 if((det=dynamic_cast<AliModule*>(dets[kz]))) {
765 TArrayI &idtmed = *(det->GetIdtmed());
766 for(nz=0;nz<100;nz++) {
767
768 // Find max and min material number
769 if((idt=idtmed[nz])) {
770 det->LoMedium() = det->LoMedium() < idt ? det->LoMedium() : idt;
771 det->HiMedium() = det->HiMedium() > idt ? det->HiMedium() : idt;
772 }
773 }
774 if(det->LoMedium() > det->HiMedium()) {
775 det->LoMedium() = 0;
776 det->HiMedium() = 0;
777 } else {
778 if(det->HiMedium() > fImedia->GetSize()) {
779 AliError(Form("Increase fImedia from %d to %d",
780 fImedia->GetSize(),det->HiMedium()));
781 return;
782 }
783 // Tag all materials in rage as belonging to detector kz
784 for(lz=det->LoMedium(); lz<= det->HiMedium(); lz++) {
785 (*fImedia)[lz]=kz;
786 }
787 }
788 }
789 }
790 //
791 // Print summary table
792 AliInfo("Tracking media ranges:");
793 ToAliInfo(
794 for(i=0;i<(ndets-1)/6+1;i++) {
795 for(k=0;k< (6<ndets-i*6?6:ndets-i*6);k++) {
796 ind=i*6+k;
797 det=dynamic_cast<AliModule*>(dets[ind]);
798 if(det)
799 printf(" %6s: %3d -> %3d;",det->GetName(),det->LoMedium(),
800 det->HiMedium());
801 else
802 printf(" %6s: %3d -> %3d;","NULL",0,0);
803 }
804 printf("\n");
805 }
806 )
807}
808
809//_______________________________________________________________________
810void AliMC::ReadTransPar()
811{
812 //
813 // Read filename to set the transport parameters
814 //
815
816
817 const Int_t kncuts=10;
818 const Int_t knflags=12;
819 const Int_t knpars=kncuts+knflags;
820 const char kpars[knpars][7] = {"CUTGAM" ,"CUTELE","CUTNEU","CUTHAD","CUTMUO",
821 "BCUTE","BCUTM","DCUTE","DCUTM","PPCUTM","ANNI",
822 "BREM","COMP","DCAY","DRAY","HADR","LOSS",
823 "MULS","PAIR","PHOT","RAYL","STRA"};
824 char line[256];
825 char detName[7];
826 char* filtmp;
827 Float_t cut[kncuts];
828 Int_t flag[knflags];
829 Int_t i, itmed, iret, ktmed, kz;
830 FILE *lun;
831 //
832 // See whether the file is there
833 filtmp=gSystem->ExpandPathName(fTransParName.Data());
834 lun=fopen(filtmp,"r");
835 delete [] filtmp;
836 if(!lun) {
837 AliWarning(Form("File %s does not exist!",fTransParName.Data()));
838 return;
839 }
840 //
841 while(1) {
842 // Initialise cuts and flags
843 for(i=0;i<kncuts;i++) cut[i]=-99;
844 for(i=0;i<knflags;i++) flag[i]=-99;
845 itmed=0;
846 memset(line,0,256);
847 // Read up to the end of line excluded
848 iret=fscanf(lun,"%255[^\n]",line);
849 if(iret<0) {
850 //End of file
851 fclose(lun);
852 return;
853 }
854 // Read the end of line
855 fscanf(lun,"%*c");
856 if(!iret) continue;
857 if(line[0]=='*') continue;
858 // Read the numbers
859 iret=sscanf(line,"%s %d %f %f %f %f %f %f %f %f %f %f %d %d %d %d %d %d %d %d %d %d %d %d",
860 detName,&itmed,&cut[0],&cut[1],&cut[2],&cut[3],&cut[4],&cut[5],&cut[6],&cut[7],&cut[8],
861 &cut[9],&flag[0],&flag[1],&flag[2],&flag[3],&flag[4],&flag[5],&flag[6],&flag[7],
862 &flag[8],&flag[9],&flag[10],&flag[11]);
863 if(!iret) continue;
864 if(iret<0) {
865 //reading error
866 AliWarning(Form("Error reading file %s",fTransParName.Data()));
867 continue;
868 }
869 // Check that the module exist
870 AliModule *mod = gAlice->GetModule(detName);
871 if(mod) {
872 // Get the array of media numbers
873 TArrayI &idtmed = *mod->GetIdtmed();
874 // Check that the tracking medium code is valid
875 if(0<=itmed && itmed < 100) {
876 ktmed=idtmed[itmed];
877 if(!ktmed) {
878 AliWarning(Form("Invalid tracking medium code %d for %s",itmed,mod->GetName()));
879 continue;
880 }
881 // Set energy thresholds
882 for(kz=0;kz<kncuts;kz++) {
883 if(cut[kz]>=0) {
884 AliDebug(2, Form("%-6s set to %10.3E for tracking medium code %4d for %s",
885 kpars[kz],cut[kz],itmed,mod->GetName()));
886 gMC->Gstpar(ktmed,kpars[kz],cut[kz]);
887 }
888 }
889 // Set transport mechanisms
890 for(kz=0;kz<knflags;kz++) {
891 if(flag[kz]>=0) {
892 AliDebug(2, Form("%-6s set to %10d for tracking medium code %4d for %s",
893 kpars[kncuts+kz],flag[kz],itmed,mod->GetName()));
894 gMC->Gstpar(ktmed,kpars[kncuts+kz],Float_t(flag[kz]));
895 }
896 }
897 } else {
898 AliWarning(Form("Invalid medium code %d",itmed));
899 continue;
900 }
901 } else {
902 AliDebug(1, Form("%s not present",detName));
903 continue;
904 }
905 }
906}
907
908//_______________________________________________________________________
909void AliMC::SetTransPar(const char *filename)
910{
911 //
912 // Sets the file name for transport parameters
913 //
914 fTransParName = filename;
915}
916
917//_______________________________________________________________________
918void AliMC::AddHit(Int_t id, Int_t track, Int_t *vol, Float_t *hits) const
919{
920 //
921 // Add a hit to detector id
922 //
923 TObjArray &dets = *gAlice->Modules();
924 if(dets[id]) static_cast<AliModule*>(dets[id])->AddHit(track,vol,hits);
925}
926
927//_______________________________________________________________________
928void AliMC::AddDigit(Int_t id, Int_t *tracks, Int_t *digits) const
929{
930 //
931 // Add digit to detector id
932 //
933 TObjArray &dets = *gAlice->Modules();
934 if(dets[id]) static_cast<AliModule*>(dets[id])->AddDigit(tracks,digits);
935}
936
937//_______________________________________________________________________
938Int_t AliMC::GetCurrentTrackNumber() const {
939 //
940 // Returns current track
941 //
942 return AliRunLoader::Instance()->Stack()->GetCurrentTrackNumber();
943}
944
945//_______________________________________________________________________
946void AliMC::DumpPart (Int_t i) const
947{
948 //
949 // Dumps particle i in the stack
950 //
951 AliRunLoader * runloader = AliRunLoader::Instance();
952 if (runloader->Stack())
953 runloader->Stack()->DumpPart(i);
954}
955
956//_______________________________________________________________________
957void AliMC::DumpPStack () const
958{
959 //
960 // Dumps the particle stack
961 //
962 AliRunLoader * runloader = AliRunLoader::Instance();
963 if (runloader->Stack())
964 runloader->Stack()->DumpPStack();
965}
966
967//_______________________________________________________________________
968Int_t AliMC::GetNtrack() const {
969 //
970 // Returns number of tracks in stack
971 //
972 Int_t ntracks = -1;
973 AliRunLoader * runloader = AliRunLoader::Instance();
974 if (runloader->Stack())
975 ntracks = runloader->Stack()->GetNtrack();
976 return ntracks;
977}
978
979//_______________________________________________________________________
980Int_t AliMC::GetPrimary(Int_t track) const
981{
982 //
983 // return number of primary that has generated track
984 //
985 Int_t nprimary = -999;
986 AliRunLoader * runloader = AliRunLoader::Instance();
987 if (runloader->Stack())
988 nprimary = runloader->Stack()->GetPrimary(track);
989 return nprimary;
990}
991
992//_______________________________________________________________________
993TParticle* AliMC::Particle(Int_t i) const
994{
995 // Returns the i-th particle from the stack taking into account
996 // the remaping done by PurifyKine
997 AliRunLoader * runloader = AliRunLoader::Instance();
998 if (runloader)
999 if (runloader->Stack())
1000 return runloader->Stack()->Particle(i);
1001 return 0x0;
1002}
1003
1004//_______________________________________________________________________
1005const TObjArray* AliMC::Particles() const {
1006 //
1007 // Returns pointer to Particles array
1008 //
1009 AliRunLoader * runloader = AliRunLoader::Instance();
1010 if (runloader)
1011 if (runloader->Stack())
1012 return runloader->Stack()->Particles();
1013 return 0x0;
1014}
1015
1016//_______________________________________________________________________
1017void AliMC::PushTrack(Int_t done, Int_t parent, Int_t pdg, const Float_t *pmom,
1018 const Float_t *vpos, const Float_t *polar, Float_t tof,
1019 TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) const
1020{
1021// Delegate to stack
1022//
1023 AliRunLoader * runloader = AliRunLoader::Instance();
1024 if (runloader)
1025 if (runloader->Stack())
1026 runloader->Stack()->PushTrack(done, parent, pdg, pmom, vpos, polar, tof,
1027 mech, ntr, weight, is);
1028}
1029
1030//_______________________________________________________________________
1031void AliMC::PushTrack(Int_t done, Int_t parent, Int_t pdg,
1032 Double_t px, Double_t py, Double_t pz, Double_t e,
1033 Double_t vx, Double_t vy, Double_t vz, Double_t tof,
1034 Double_t polx, Double_t poly, Double_t polz,
1035 TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) const
1036{
1037 // Delegate to stack
1038 //
1039 AliRunLoader * runloader = AliRunLoader::Instance();
1040 if (runloader)
1041 if (runloader->Stack())
1042 runloader->Stack()->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof,
1043 polx, poly, polz, mech, ntr, weight, is);
1044}
1045
1046//_______________________________________________________________________
1047void AliMC::SetHighWaterMark(Int_t nt) const
1048{
1049 //
1050 // Set high water mark for last track in event
1051 AliRunLoader * runloader = AliRunLoader::Instance();
1052 if (runloader)
1053 if (runloader->Stack())
1054 runloader->Stack()->SetHighWaterMark(nt);
1055}
1056
1057//_______________________________________________________________________
1058void AliMC::KeepTrack(Int_t track) const
1059{
1060 //
1061 // Delegate to stack
1062 //
1063 AliRunLoader * runloader = AliRunLoader::Instance();
1064 if (runloader)
1065 if (runloader->Stack())
1066 runloader->Stack()->KeepTrack(track);
1067}
1068
1069//_______________________________________________________________________
1070void AliMC::FlagTrack(Int_t track) const
1071{
1072 // Delegate to stack
1073 //
1074 AliRunLoader * runloader = AliRunLoader::Instance();
1075 if (runloader)
1076 if (runloader->Stack())
1077 runloader->Stack()->FlagTrack(track);
1078}
1079
1080//_______________________________________________________________________
1081void AliMC::SetCurrentTrack(Int_t track) const
1082{
1083 //
1084 // Set current track number
1085 //
1086 AliRunLoader * runloader = AliRunLoader::Instance();
1087 if (runloader)
1088 if (runloader->Stack())
1089 runloader->Stack()->SetCurrentTrack(track);
1090}
1091
1092//_______________________________________________________________________
1093AliTrackReference* AliMC::AddTrackReference(Int_t label, Int_t id)
1094{
1095 //
1096 // add a trackrefernce to the list
1097 Int_t primary = GetPrimary(label);
1098 Particle(primary)->SetBit(kKeepBit);
1099
1100 Int_t nref = fTmpTrackReferences.GetEntriesFast();
1101 return new(fTmpTrackReferences[nref]) AliTrackReference(label, id);
1102}
1103
1104
1105
1106//_______________________________________________________________________
1107void AliMC::ResetTrackReferences()
1108{
1109 //
1110 // Reset all references
1111 //
1112 fTmpTrackReferences.Clear();
1113}
1114
1115//_______________________________________________________________________
1116void AliMC::RemapTrackReferencesIDs(const Int_t *map)
1117{
1118 //
1119 // Remapping track reference
1120 // Called at finish primary
1121 //
1122
1123 Int_t nEntries = fTmpTrackReferences.GetEntries();
1124 for (Int_t i=0; i < nEntries; i++){
1125 AliTrackReference * ref = dynamic_cast<AliTrackReference*>(fTmpTrackReferences.UncheckedAt(i));
1126 if (ref) {
1127 Int_t newID = map[ref->GetTrack()];
1128 if (newID>=0) ref->SetTrack(newID);
1129 else {
1130 ref->SetBit(kNotDeleted,kFALSE);
1131 fTmpTrackReferences.RemoveAt(i);
1132 }
1133 } // if ref
1134 }
1135 fTmpTrackReferences.Compress();
1136}
1137
1138//_______________________________________________________________________
1139void AliMC::FixParticleDecaytime()
1140{
1141 //
1142 // Fix the particle decay time according to rmin and rmax for decays
1143 //
1144
1145 TLorentzVector p;
1146 gMC->TrackMomentum(p);
1147 Double_t tmin, tmax;
1148 Double_t b;
1149
1150 // Transverse velocity
1151 Double_t vt = p.Pt() / p.E();
1152
1153 if ((b = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->SolenoidField()) > 0.) { // [kG]
1154
1155 // Radius of helix
1156
1157 Double_t rho = p.Pt() / 0.0003 / b; // [cm]
1158
1159 // Revolution frequency
1160
1161 Double_t omega = vt / rho;
1162
1163 // Maximum and minimum decay time
1164 //
1165 // Check for curlers first
1166 const Double_t kOvRhoSqr2 = 1./(rho*TMath::Sqrt(2.));
1167 if (fRDecayMax * kOvRhoSqr2 > 1.) return;
1168
1169 //
1170
1171 tmax = TMath::ACos((1.-fRDecayMax*kOvRhoSqr2)*(1.+fRDecayMax*kOvRhoSqr2)) / omega; // [ct]
1172 tmin = TMath::ACos((1.-fRDecayMin*kOvRhoSqr2)*(1.+fRDecayMin*kOvRhoSqr2)) / omega; // [ct]
1173 } else {
1174 tmax = fRDecayMax / vt; // [ct]
1175 tmin = fRDecayMin / vt; // [ct]
1176 }
1177
1178 //
1179 // Dial t using the two limits
1180 Double_t t = tmin + (tmax - tmin) * gRandom->Rndm(); // [ct]
1181 //
1182 //
1183 // Force decay time in transport code
1184 //
1185 gMC->ForceDecayTime(t / 2.99792458e10);
1186}
1187
1188void AliMC::MakeTmpTrackRefsTree()
1189{
1190 // Make the temporary track reference tree
1191 fTmpFileTR = new TFile("TrackRefsTmp.root", "recreate");
1192 fTmpTreeTR = new TTree("TreeTR", "Track References");
1193 TClonesArray* pRef = &fTmpTrackReferences;
1194 fTmpTreeTR->Branch("TrackReferences", &pRef, 4000);
1195}
1196
1197//_______________________________________________________________________
1198void AliMC::ReorderAndExpandTreeTR()
1199{
1200//
1201// Reorder and expand the temporary track reference tree in order to match the kinematics tree
1202//
1203
1204 AliRunLoader *rl = AliRunLoader::Instance();
1205//
1206// TreeTR
1207 AliDebug(1, "fRunLoader->MakeTrackRefsContainer()");
1208 rl->MakeTrackRefsContainer();
1209 TTree * treeTR = rl->TreeTR();
1210 // make branch for central track references
1211 TClonesArray* pRef = &fTrackReferences;
1212 treeTR->Branch("TrackReferences", &pRef);
1213
1214 AliStack* stack = rl->Stack();
1215 Int_t np = stack->GetNprimary();
1216 Int_t nt = fTmpTreeTR->GetEntries();
1217 //
1218 // Loop over tracks and find the secondaries with the help of the kine tree
1219 Int_t ifills = 0;
1220 Int_t it = 0;
1221 for (Int_t ip = np - 1; ip > -1; ip--) {
1222 TParticle *part = stack->Particle(ip);
1223 //printf("Particle %5d %5d %5d %5d %5d \n", ip, part->GetPdgCode(), part->GetFirstMother(), part->GetFirstDaughter(), part->GetLastDaughter());
1224
1225 // Skip primaries that have not been transported
1226 Int_t dau1 = part->GetFirstDaughter();
1227 Int_t dau2 = -1;
1228 if (!part->TestBit(kTransportBit)) continue;
1229 //
1230 fTmpTreeTR->GetEntry(it++);
1231 Int_t nh = fTmpTrackReferences.GetEntries();
1232 // Determine range of secondaries produced by this primary
1233 if (dau1 > -1) {
1234 Int_t inext = ip - 1;
1235 while (dau2 < 0) {
1236 if (inext >= 0) {
1237 part = stack->Particle(inext);
1238 dau2 = part->GetFirstDaughter();
1239 if (!(part->TestBit(kTransportBit)) || dau2 == -1 || dau2 < np) {
1240// if (dau2 == -1 || dau2 < np) {
1241 dau2 = -1;
1242 } else {
1243 dau2--;
1244 }
1245 } else {
1246 dau2 = stack->GetNtrack() - 1;
1247 }
1248 inext--;
1249 } // find upper bound
1250 } // dau2 < 0
1251// printf("Check (1) %5d %5d %5d %5d %5d \n", ip, np, it, dau1, dau2);
1252 //
1253 // Loop over reference hits and find secondary label
1254 for (Int_t id = dau1; (id <= dau2) && (dau1 > -1); id++) {
1255 for (Int_t ih = 0; ih < nh; ih++) {
1256 AliTrackReference* tr = (AliTrackReference*) fTmpTrackReferences.At(ih);
1257 Int_t label = tr->Label();
1258 // Skip primaries
1259 if (label == ip) continue;
1260 if (label > dau2 || label < dau1)
1261 AliWarning(Form("Track Reference Label out of range !: %5d %5d %5d \n", label, dau1, dau2));
1262 if (label == id) {
1263 // secondary found
1264 Int_t nref = fTrackReferences.GetEntriesFast();
1265 new(fTrackReferences[nref]) AliTrackReference(*tr);
1266 }
1267 } // hits
1268 treeTR->Fill();
1269 fTrackReferences.Clear();
1270 ifills++;
1271 } // daughters
1272 } // tracks
1273 //
1274 // Now loop again and write the primaries
1275 it = nt - 1;
1276 for (Int_t ip = 0; ip < np; ip++) {
1277 TParticle* part = stack->Particle(ip);
1278// if ((part->GetFirstDaughter() == -1 && part->GetStatusCode() <= 1) || part->GetFirstDaughter() >= np)
1279 if (part->TestBit(kTransportBit))
1280 {
1281 // Skip particles that have not been transported
1282 fTmpTreeTR->GetEntry(it--);
1283 Int_t nh = fTmpTrackReferences.GetEntries();
1284 //
1285 // Loop over reference hits and find primary labels
1286 for (Int_t ih = 0; ih < nh; ih++) {
1287 AliTrackReference* tr = (AliTrackReference*) fTmpTrackReferences.At(ih);
1288 Int_t label = tr->Label();
1289 if (label == ip) {
1290 Int_t nref = fTrackReferences.GetEntriesFast();
1291 new(fTrackReferences[nref]) AliTrackReference(*tr);
1292 }
1293 }
1294 }
1295 treeTR->Fill();
1296 fTrackReferences.Clear();
1297 ifills++;
1298 } // tracks
1299 // Check
1300 if (ifills != stack->GetNtrack())
1301 AliWarning(Form("Number of entries in TreeTR (%5d) unequal to TreeK (%5d) \n", ifills, stack->GetNtrack()));
1302//
1303// Clean-up
1304 delete fTmpTreeTR;
1305 fTmpFileTR->Close();
1306 delete fTmpFileTR;
1307 fTmpTrackReferences.Clear();
1308 gSystem->Exec("rm -rf TrackRefsTmp.root");
1309}
1310