1 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
2 * See cxx source for full Copyright notice */
3 // Implementation of the interface for THBTprocessor
4 // Author: Piotr Krzysztof Skowronski <Piotr.Skowronski@cern.ch>
5 //////////////////////////////////////////////////////////////////////////////////
6 //Wrapper class for "hbt processor" after burner
7 //The origibal code is written in fortran by Lanny Ray
8 //and is put in the directory $ALICE_ROOT/HBTprocessor
9 //Detailed description is on the top of the file hbt_event_processor.f
11 //This class can be used ONLY with AliGenCocktailAfterBurner wrapper generator
14 // AliGenCocktailAfterBurner = gener = new AliGenCocktailAfterBurner();
15 // gener->SetPhiRange(0, 360); //Set global parameters
16 // gener->SetThetaRange(35., 145.);
17 // AliGenHIJINGpara *hijing = new AliGenHIJINGpara(10000); //Add some generator
18 // hijing->SetMomentumRange(0, 999);
19 // gener->AddGenerator(hijing,"HIJING PARAMETRIZATION",1);
21 // AliGenHBTprocessor *hbtp = new AliGenHBTprocessor(); //create object
22 // hbtp->SetRefControl(2); //set parameters
23 // hbtp->SetSwitch1D(1);
24 // hbtp->SetR0(6);//fm - radius
25 // hbtp->SetLambda(0.7);//chaocity parameter
26 // gener->AddAfterBurner(hbtp,"HBT PROCESSOR",1); //add to the main generator
31 // A) HBT PROCESSOR NEEDS MORE THAN ONE EVENT TO WORK
32 // AS MORE AS IT BETTER WORKS
33 // B) IT IS ABLE TO "ADD" CORRELATIONS ONLY UP TO TWO PARTICLE TYPES AT ONES
36 // Artificial particle dennsity enhancment feature
37 // HBT Processor is unable to process correctly low multiplicity particles
38 // even if the high statistics (more events) is supplied.
39 // For that reason was implemented artificial multiplicity enhancement
40 // - see also comments in HBT Processor source file (HBTP/hbt_event_processor.f)
41 // or web page (http://alisoft.cern.ch/people/skowron/hbtprocessor/hbteventprocessor.html)
42 // concerning trk_accep or SetTrackRejectionFactor method in this class
43 // Fortran is cheated by masking several events a single one. Number is defined by fEventMerge
44 // variable. In case it is equal to 1, there is no masking and the feature is off.
45 // But, for example if it is 5, and we have 100 events, number of events passed to fortran is 100/5=20
46 // When fortran asks about multiplcity of event, let sey, 1 - multiplicity of events 5 to 9 is summed up
50 //////////////////////////////////////////////////////////////////////////////////
52 // 11.11.2001 Piotr Skowronski
53 // Setting seed (date) in RNG in the constructor
55 // 09.10.2001 Piotr Skowronski
57 // Theta - Eta cohernecy facilities added:
58 // AliGenerator::SetThetaRange method overriden
59 // Static methods added
65 // Class description comments put on proper place
67 // 27.09.2001 Piotr Skowronski
68 // removing of redefinition of defaults velues
69 // in method's implementation.
73 #include "AliGenHBTprocessor.h"
75 #include <TParticle.h>
76 #include "THBTprocessor.h"
79 #include "AliGenCocktailAfterBurner.h"
83 ClassImp(AliGenHBTprocessor)
85 Int_t AliGenHBTprocessor::fgDebug = 0;
86 static TRandom* gAliRandom;//RNG to be used by the fortran code
88 AliGenCocktailAfterBurner* GetGenerator();
89 /*******************************************************************/
90 AliGenHBTprocessor::AliGenHBTprocessor(const AliGenHBTprocessor& in):
97 // AliGenHBTprocessor::AliGenHBTprocessor();
100 AliGenHBTprocessor::AliGenHBTprocessor():
107 // Standard constructor
108 // Sets default veues of all parameters
110 SetName("AliGenHBTprocessor");
111 SetTitle("AliGenHBTprocessor");
113 gAliRandom = fRandom;
114 fHBTprocessor = new THBTprocessor();
119 SetTrackRejectionFactor();
139 SetSwitchCoherence();
141 SetSwitchFermiBose();
142 //SetMomentumRange();
155 SetNBins1DFineMesh();
156 SetBinSize1DFineMesh();
157 SetNBins1DCoarseMesh();
158 SetBinSize1DCoarseMesh();
159 SetNBins3DFineMesh();
160 SetBinSize3DFineMesh();
161 SetNBins3DCoarseMesh();
162 SetBinSize3DCoarseMesh();
163 SetNBins3DFineProjectMesh();
166 /*******************************************************************/
169 /*******************************************************************/
171 AliGenHBTprocessor::~AliGenHBTprocessor()
175 if (fHBTprocessor) delete fHBTprocessor; //delete generator
179 /*******************************************************************/
181 void AliGenHBTprocessor::InitStatusCodes()
183 //creates and inits status codes array to zero
184 AliGenCocktailAfterBurner *cab = GetGenerator();
186 if(!cab) Fatal("InitStatusCodes()","Can not find AliGenCocktailAfterBurner generator");
188 Int_t nev = cab->GetNumberOfEvents();
190 fHbtPStatCodes = new Int_t* [nev];
191 for( Int_t i =0; i<nev;i++)
193 Int_t nprim = cab->GetStack(i)->GetNprimary();
194 fHbtPStatCodes[i] = new Int_t[nprim];
195 for (Int_t k =0 ;k<nprim;k++)
196 fHbtPStatCodes[i][k] =0;
201 /*******************************************************************/
203 void AliGenHBTprocessor::CleanStatusCodes()
205 //Cleans up status codes
208 for (Int_t i =0; i<GetGenerator()->GetNumberOfEvents(); i++)
209 delete [] fHbtPStatCodes[i];
210 delete fHbtPStatCodes;
215 /*******************************************************************/
217 void AliGenHBTprocessor::Init()
219 //sets up parameters in generator
221 THBTprocessor *thbtp = fHBTprocessor;
224 thbtp->SetTrackRejectionFactor(fTrackRejectionFactor);
225 thbtp->SetRefControl(fReferenceControl);
227 if ((fPid[0] == fPid[1]) || (fPid[0] == 0) || (fPid[1] == 0))
230 thbtp->SetPIDs(IdFromPDG(fPid[1]) ,0);
232 thbtp->SetPIDs(IdFromPDG(fPid[0]) ,0);
233 thbtp->SetNPIDtypes(1);
236 Warning("AliGenHBTprocessor::Init","\nThere is only one particle type set,\n\
237 and Switch_Type differnt then 1,\n which does not make sense.\n\
238 Setting it to 1.\n");
244 thbtp->SetPIDs(IdFromPDG(fPid[0]) ,IdFromPDG(fPid[1]));
246 thbtp->SetSwitchType(fSwitchType);
249 thbtp->SetMaxIterations(fMaxit);
250 thbtp->SetDelChi(fDelchi);
251 thbtp->SetIRand(fIrand);
252 thbtp->SetLambda(fLambda);
254 thbtp->SetRSide(fRside);
255 thbtp->SetROut(fRout);
256 thbtp->SetRLong(fRlong);
257 thbtp->SetRPerp(fRperp);
258 thbtp->SetRParallel(fRparallel);
261 thbtp->SetSwitch1D(fSwitch1d);
262 thbtp->SetSwitch3D(fSwitch3d);
263 thbtp->SetSwitchType(fSwitchType);
264 thbtp->SetSwitchCoherence(fSwitchCoherence);
265 thbtp->SetSwitchCoulomb(fSwitchCoulomb);
266 thbtp->SetSwitchFermiBose(fSwitchFermiBose);
267 thbtp->SetPtRange(fPtMin,fPtMax);
268 thbtp->SetPxRange(fPxMin,fPxMax);
269 thbtp->SetPyRange(fPyMin,fPyMax);
270 thbtp->SetPzRange(fPzMin,fPzMax);
271 thbtp->SetPhiRange(fPhiMin*180./((Float_t)TMath::Pi())+180.0, //casting is because if fPhiMin = 180.0 then
272 fPhiMax*180./((Float_t)TMath::Pi())+180.0);//TMath::Pi() != TMath::Pi()*fPhiMin/180.0,
273 thbtp->SetEtaRange(fEtaMin,fEtaMax);
274 thbtp->SetNPtBins(fNPtBins);
275 thbtp->SetNPhiBins(fNPhiBins);
276 thbtp->SetNEtaBins(fNEtaBins);
277 thbtp->SetNPxBins(fNPxBins);
278 thbtp->SetNPyBins(fNPyBins);
279 thbtp->SetNPzBins(fNPzBins);
280 thbtp->SetNBins1DFineMesh(fN1dFine);
281 thbtp->SetBinSize1DFineMesh(fBinsize1dFine);
282 thbtp->SetNBins1DCoarseMesh(fN1dCoarse);
283 thbtp->SetBinSize1DCoarseMesh(fBinsize1dCoarse);
284 thbtp->SetNBins3DFineMesh(fN3dFine);
285 thbtp->SetBinSize3DFineMesh(fBinsize3dFine);
286 thbtp->SetNBins3DCoarseMesh(fN3dCoarse);
287 thbtp->SetBinSize3DCoarseMesh(fBinsize3dCoarse);
288 thbtp->SetNBins3DFineProjectMesh(fN3dFineProject);
290 thbtp->SetPrintFull(fPrintFull);
293 /*******************************************************************/
295 void AliGenHBTprocessor::Generate()
298 AliGenCocktailAfterBurner* cab = GetGenerator();
301 Fatal("Generate()","AliGenHBTprocessor needs AliGenCocktailAfterBurner to be main generator");
303 if (cab->GetNumberOfEvents() <2)
306 "HBT Processor needs more than 1 event to work properly,\
307 but there is only %d set", cab->GetNumberOfEvents());
311 fHBTprocessor->Initialize(); //reset all fields of common blocks
312 //in case there are many HBT processors
313 //run one after one (i.e. in AliCocktailAfterBurner)
314 //between Init() called and Generate there might
315 Init(); //be different instance running - be sure that we have our settings
317 InitStatusCodes(); //Init status codes
319 fHBTprocessor->GenerateEvent(); //Generates event
321 CleanStatusCodes(); //Clean Status codes - thet are not needed anymore
324 /*******************************************************************/
327 /*******************************************************************/
328 void AliGenHBTprocessor::GetParticles(TClonesArray * particles) const
333 Error("GetParticles","Particles has to be initialized");
336 fHBTprocessor->ImportParticles(particles);
339 /*******************************************************************/
341 Int_t AliGenHBTprocessor::GetHbtPStatusCode(Int_t part) const
343 //returns the status code of the given particle in the active event
344 //see SetActiveEvent in the bottom of AliGenHBTprocessor.cxx
345 //and in AliCocktailAfterBurner
347 GetTrackEventIndex(part,ev,idx);
348 if ( (ev<0) || (idx<0) )
350 Error("GetHbtPStatusCode","GetTrackEventIndex returned error");
353 return fHbtPStatCodes[ev][idx];
357 /*******************************************************************/
358 void AliGenHBTprocessor::SetHbtPStatusCode(Int_t hbtstatcode, Int_t part)
360 //Sets the given status code to given particle number (part) in the active event
362 GetTrackEventIndex(part,ev,idx);
363 if ( (ev<0) || (idx<0) )
365 Error("GetHbtPStatusCode","GetTrackEventIndex returned error");
368 else fHbtPStatCodes[ev][idx] = hbtstatcode;
371 /*******************************************************************/
373 void AliGenHBTprocessor::SetTrackRejectionFactor(Float_t trf) //def 1.0
375 //Sets the Track Rejection Factor
376 //variates in range 0.0 <-> 1.0
377 //Describes the factor of particles rejected from the output.
378 //Used only in case of low muliplicity particles e.g. lambdas.
379 //Processor generates addisional particles and builds the
380 //correletions on such a statistics.
381 //At the end these particels are left in the event according
382 //to this factor: 1==all particles are left
383 // 0==all are removed
385 fTrackRejectionFactor=trf;
386 fHBTprocessor->SetTrackRejectionFactor(trf);
388 /*******************************************************************/
390 void AliGenHBTprocessor::SetRefControl(Int_t rc) //default 2
392 //Sets the Refernce Control Switch
393 //switch wether read reference histograms from file =1
394 // compute from input events =2 - default
395 fReferenceControl=rc;
396 fHBTprocessor->SetRefControl(rc);
398 /*******************************************************************/
400 void AliGenHBTprocessor::SetPIDs(Int_t pid1,Int_t pid2)
403 //Sets PDG Codes of particles to be processed, default \\Pi^{+} and \\Pi^{-}
404 //This method accepts PDG codes which is
405 //in opposite to THBBProcessor which accepts GEANT PID
406 if ( (pid1 == 0) && (pid2 == 0) )
408 Error("AliGenHBTprocessor::SetPIDs","Sensless Particle Types setting: 0 0, Ignoring\n");
416 fHBTprocessor->SetPIDs(IdFromPDG(pid1) ,0);
422 fHBTprocessor->SetPIDs(IdFromPDG(pid1) ,IdFromPDG(pid2));
426 /*******************************************************************/
428 void AliGenHBTprocessor::SetNPIDtypes(Int_t npidt)
430 //Number ofparticle types to be processed - default 2
431 //see AliGenHBTprocessor::SetPIDs
434 fHBTprocessor->SetNPIDtypes(npidt);
436 /*******************************************************************/
438 void AliGenHBTprocessor::SetDeltap(Float_t deltp)
441 //maximum range for random momentum shifts in GeV/c;
442 //px,py,pz independent; Default = 0.1 GeV/c.
444 fHBTprocessor->SetDeltap(deltp);
446 /*******************************************************************/
448 void AliGenHBTprocessor::SetMaxIterations(Int_t maxiter)
450 //maximum # allowed iterations thru all the
451 //tracks for each event. Default = 50.
452 //If maxit=0, then calculate the correlations
453 //for the input set of events without doing the
454 //track adjustment procedure.
457 fHBTprocessor->SetMaxIterations(maxiter);
460 /*******************************************************************/
461 void AliGenHBTprocessor::SetDelChi(Float_t dc)
463 //min % change in total chi-square for which
464 //the track adjustment iterations may stop,
468 fHBTprocessor->SetDelChi(dc);
470 /*******************************************************************/
472 void AliGenHBTprocessor::SetIRand(Int_t irnd)
474 //if fact dummy - used only for compatibility
475 //we are using AliRoot built in RNG
476 //dummy in fact since we are using aliroot build-in RNG
477 //Sets renaodom number generator
479 fHBTprocessor->SetIRand(irnd);
481 /*******************************************************************/
483 void AliGenHBTprocessor::SetLambda(Float_t lam)
486 // Sets Chaoticity Parameter
488 fHBTprocessor->SetLambda(lam);
490 /*******************************************************************/
491 void AliGenHBTprocessor::SetR1d(Float_t r)
494 //Sets Spherical source model radius (fm)
496 fHBTprocessor->SetR1d(r);
498 /*******************************************************************/
499 void AliGenHBTprocessor::SetRSide(Float_t rs)
502 //Rside,Rout,Rlong = Non-spherical Bertsch-Pratt source model (fm)
505 fHBTprocessor->SetRSide(rs);
507 /*******************************************************************/
508 void AliGenHBTprocessor::SetROut(Float_t ro)
511 //Rside,Rout,Rlong = Non-spherical Bertsch-Pratt source model (fm)
513 fHBTprocessor->SetROut(ro);
515 /*******************************************************************/
516 void AliGenHBTprocessor::SetRLong(Float_t rl)
519 //Rside,Rout,Rlong = Non-spherical Bertsch-Pratt source model (fm)
521 fHBTprocessor->SetRLong(rl);
523 /*******************************************************************/
524 void AliGenHBTprocessor::SetRPerp(Float_t rp)
527 //Rperp,Rparallel,R0= Non-spherical Yano-Koonin-Podgoretski source model (fm).
529 fHBTprocessor->SetRPerp(rp);
531 /*******************************************************************/
532 void AliGenHBTprocessor::SetRParallel(Float_t rprl)
535 //Rperp,Rparallel,R0= Non-spherical Yano-Koonin-Podgoretski source model (fm).
537 fHBTprocessor->SetRParallel(rprl);
539 /*******************************************************************/
540 void AliGenHBTprocessor::SetR0(Float_t r0)
543 //Rperp,Rparallel,R0= Non-spherical Yano-Koonin-Podgoretski source model (fm).
545 fHBTprocessor->SetR0(r0);
547 /*******************************************************************/
548 void AliGenHBTprocessor::SetQ0(Float_t q0)
551 //Sets Q0 = NA35 Coulomb parameter for finite source size in (GeV/c)
552 // if fSwitchCoulomb = 2
553 // = Spherical Coulomb source radius in (fm)
554 // if switchCoulomb = 3, used to interpolate the
555 // input Pratt/Cramer discrete Coulomb source
558 fHBTprocessor->SetQ0(q0);
561 /*******************************************************************/
562 void AliGenHBTprocessor::SetSwitch1D(Int_t s1d)
566 // = 0 to not compute the 1D two-body //orrelations.
567 // = 1 to compute this using Q-invariant
568 // = 2 to compute this using Q-total
569 // = 3 to compute this using Q-3-ve//tor
572 fHBTprocessor->SetSwitch1D(s1d);
574 /*******************************************************************/
575 void AliGenHBTprocessor::SetSwitch3D(Int_t s3d)
579 // = 0 to not compute the 3D two-body correlations.
580 // = 1 to compute this using the side-out-long form
581 // = 2 to compute this using the Yanno-Koonin-Pogoredskij form.
584 fHBTprocessor->SetSwitch3D(s3d);
586 /*******************************************************************/
587 void AliGenHBTprocessor::SetSwitchType(Int_t st)
590 // Sets switch_type = 1 to fit only the like pair correlations
591 // = 2 to fit only the unlike pair correlations
592 // = 3 to fit both the like and unlike pair correl.
593 //See SetPIDs and Init
594 //If only one particle type is set, unly==1 makes sens
597 fHBTprocessor->SetSwitchType(st);
599 /*******************************************************************/
600 void AliGenHBTprocessor::SetSwitchCoherence(Int_t sc)
603 // switchCoherence = 0 for purely incoherent source (but can have
605 // = 1 for mixed incoherent and coherent source
607 fSwitchCoherence = sc;
608 fHBTprocessor->SetSwitchCoherence(sc);
610 /*******************************************************************/
611 void AliGenHBTprocessor::SetSwitchCoulomb(Int_t scol)
614 // switchCoulomb = 0 no Coulomb correction
615 // = 1 Point source Gamow correction only
616 // = 2 NA35 finite source size correction
617 // = 3 Pratt/Cramer finite source size correction;
618 // interpolated from input tables.
619 fSwitchCoulomb =scol;
620 fHBTprocessor->SetSwitchCoulomb(scol);
622 /*******************************************************************/
623 void AliGenHBTprocessor::SetSwitchFermiBose(Int_t sfb)
626 // switchFermiBose = 1 Boson pairs
627 // = -1 Fermion pairs
629 fSwitchFermiBose = sfb;
630 fHBTprocessor->SetSwitchFermiBose(sfb);
632 /*******************************************************************/
633 void AliGenHBTprocessor::SetPtRange(Float_t ptmin, Float_t ptmax)
635 // default ptmin = 0.1, ptmax = 0.98
636 //Sets Pt range (GeV)
637 AliGenerator::SetPtRange(ptmin,ptmax);
638 fHBTprocessor->SetPtRange(ptmin,ptmax);
641 /*******************************************************************/
642 void AliGenHBTprocessor::SetPxRange(Float_t pxmin, Float_t pxmax)
644 //default pxmin = -1.0, pxmax = 1.0
648 fHBTprocessor->SetPxRange(pxmin,pxmax);
650 /*******************************************************************/
651 void AliGenHBTprocessor::SetPyRange(Float_t pymin, Float_t pymax)
653 //default pymin = -1.0, pymax = 1.0
657 fHBTprocessor->SetPyRange(pymin,pymax);
659 /*******************************************************************/
660 void AliGenHBTprocessor::SetPzRange(Float_t pzmin, Float_t pzmax)
662 //default pzmin = -3.6, pzmax = 3.6
666 fHBTprocessor->SetPzRange(pzmin,pzmax);
668 void AliGenHBTprocessor::SetMomentumRange(Float_t /*pmin*/, Float_t /*pmax*/) const
670 //default pmin=0, pmax=0
671 //Do not use this method!
672 MayNotUse("AliGenHBTprocessor::SetMomentumRange Method is Dummy");
675 /*******************************************************************/
676 void AliGenHBTprocessor::SetPhiRange(Float_t phimin, Float_t phimax)
680 AliGenerator::SetPhiRange(phimin,phimax);
682 fHBTprocessor->SetPhiRange(phimin+180.0,phimax+180.0);
684 /*******************************************************************/
685 void AliGenHBTprocessor::SetEtaRange(Float_t etamin, Float_t etamax)
687 //default etamin = -1.5, etamax = 1.5
691 fHBTprocessor->SetEtaRange(etamin,etamax);
693 //set the azimothal angle range in the AliGeneraor -
694 //to keep coherency between azimuthal angle and pseudorapidity
695 //DO NOT CALL this->SetThetaRange, because it calls this method (where we are)
696 //which must cause INFINITE LOOP
697 AliGenerator::SetThetaRange(RadiansToDegrees(EtaToTheta(fEtaMin)),
698 RadiansToDegrees(EtaToTheta(fEtaMax)));
701 /*******************************************************************/
702 void AliGenHBTprocessor::SetThetaRange(Float_t thetamin, Float_t thetamax)
704 //default thetamin = 0, thetamax = 180
705 //Azimuthal angle, override AliGenerator method which uses widely (i.e. wrapper generators)
706 //core fortran HBTProcessor uses Eta (pseudorapidity)
707 //so these methods has to be synchronized
709 AliGenerator::SetThetaRange(thetamin,thetamax);
711 SetEtaRange( ThetaToEta(fThetaMin) , ThetaToEta(fThetaMax) );
715 /*******************************************************************/
716 void AliGenHBTprocessor::SetNPtBins(Int_t nptbin)
718 //default nptbin = 50
719 //set number of Pt bins
721 fHBTprocessor->SetNPtBins(nptbin);
723 /*******************************************************************/
724 void AliGenHBTprocessor::SetNPhiBins(Int_t nphibin)
726 //default nphibin = 50
727 //set number of Phi bins
729 fHBTprocessor->SetNPhiBins(nphibin);
731 /*******************************************************************/
732 void AliGenHBTprocessor::SetNEtaBins(Int_t netabin)
734 //default netabin = 50
735 //set number of Eta bins
737 fHBTprocessor->SetNEtaBins(netabin);
739 /*******************************************************************/
740 void AliGenHBTprocessor::SetNPxBins(Int_t npxbin)
742 //default npxbin = 20
743 //set number of Px bins
745 fHBTprocessor->SetNPxBins(npxbin);
747 /*******************************************************************/
748 void AliGenHBTprocessor::SetNPyBins(Int_t npybin)
750 //default npybin = 20
751 //set number of Py bins
753 fHBTprocessor->SetNPyBins(npybin);
755 /*******************************************************************/
756 void AliGenHBTprocessor::SetNPzBins(Int_t npzbin)
758 //default npzbin = 70
759 //set number of Pz bins
761 fHBTprocessor->SetNPzBins(npzbin);
763 /*******************************************************************/
764 void AliGenHBTprocessor::SetNBins1DFineMesh(Int_t n)
767 //Sets the number of bins in the 1D mesh
769 fHBTprocessor->SetNBins1DFineMesh(n);
772 /*******************************************************************/
773 void AliGenHBTprocessor::SetBinSize1DFineMesh(Float_t x)
776 //Sets the bin size in the 1D mesh
778 fHBTprocessor->SetBinSize1DFineMesh(x);
780 /*******************************************************************/
782 void AliGenHBTprocessor::SetNBins1DCoarseMesh(Int_t n)
785 //Sets the number of bins in the coarse 1D mesh
787 fHBTprocessor->SetNBins1DCoarseMesh(n);
789 /*******************************************************************/
790 void AliGenHBTprocessor::SetBinSize1DCoarseMesh(Float_t x)
793 //Sets the bin size in the coarse 1D mesh
795 fHBTprocessor->SetBinSize1DCoarseMesh(x);
797 /*******************************************************************/
799 void AliGenHBTprocessor::SetNBins3DFineMesh(Int_t n)
802 //Sets the number of bins in the 3D mesh
804 fHBTprocessor->SetNBins3DFineMesh(n);
806 /*******************************************************************/
807 void AliGenHBTprocessor::SetBinSize3DFineMesh(Float_t x)
810 //Sets the bin size in the 3D mesh
812 fHBTprocessor->SetBinSize3DFineMesh(x);
814 /*******************************************************************/
816 void AliGenHBTprocessor::SetNBins3DCoarseMesh(Int_t n)
819 //Sets the number of bins in the coarse 3D mesh
822 fHBTprocessor->SetNBins3DCoarseMesh(n);
824 /*******************************************************************/
825 void AliGenHBTprocessor::SetBinSize3DCoarseMesh(Float_t x)
828 //Sets the bin size in the coarse 3D mesh
829 fBinsize3dCoarse = x;
830 fHBTprocessor->SetBinSize3DCoarseMesh(x);
832 /*******************************************************************/
834 void AliGenHBTprocessor::SetNBins3DFineProjectMesh(Int_t n )
837 //Sets the number of bins in the fine project mesh
839 fHBTprocessor->SetNBins3DFineProjectMesh(n);
841 /*******************************************************************/
842 void AliGenHBTprocessor::SetPrintFull(Int_t flag)
844 //sets the print full flag
846 fHBTprocessor->SetPrintFull(flag);
850 /*******************************************************************/
852 Int_t AliGenHBTprocessor::GetNumberOfEvents()
854 //returns number of available events
855 AliGenerator* g = gAlice->Generator();
856 AliGenCocktailAfterBurner* cab = (g)?dynamic_cast<AliGenCocktailAfterBurner*>(g):0x0;
859 Fatal("GetNumberOfEvents","Master Generator is not an AliGenCocktailAfterBurner");
862 return (Int_t)TMath::Ceil(cab->GetNumberOfEvents()/((Float_t)fEventMerge));
865 /*******************************************************************/
867 void AliGenHBTprocessor::SetActiveEventNumber(Int_t n)
869 //sets the active event
870 fActiveStack = n*fEventMerge;
872 Info("SetActiveEventNumber","Settimg active event %d passed %d",
875 /*******************************************************************/
877 Int_t AliGenHBTprocessor::GetNumberOfTracks()
879 //returns number of tracks in active event
880 AliGenerator* g = gAlice->Generator();
881 AliGenCocktailAfterBurner* cab = (g)?dynamic_cast<AliGenCocktailAfterBurner*>(g):0x0;
884 Fatal("GetNumberOfEvents","Master Generator is not an AliGenCocktailAfterBurner");
888 for (Int_t i = fActiveStack;i < fActiveStack+fEventMerge; i++)
890 if (i >= GetNumberOfEvents()) break; //protection not to overshoot nb of events
891 AliStack* stack = cab->GetStack(i);
893 Error("GetNumberOfTracks","There is no stack %d",i);
895 n+=stack->GetNprimary();
899 /*******************************************************************/
901 void AliGenHBTprocessor::SetNEventsToMerge(Int_t nev)
903 //sets number of events to merge
904 if (nev > 0 ) fEventMerge = nev;
906 /*******************************************************************/
908 TParticle* AliGenHBTprocessor::GetTrack(Int_t n)
910 //returns track that hbtp thinks is n in active event
911 if (GetDebug() > 5) Info("GetTrack","n = %d",n);
912 AliGenerator* g = gAlice->Generator();
913 AliGenCocktailAfterBurner* cab = (g)?dynamic_cast<AliGenCocktailAfterBurner*>(g):0x0;
916 Fatal("GetTrackEventIndex","Master Generator is not an AliGenCocktailAfterBurner");
921 GetTrackEventIndex(n,ev,idx);
922 if (GetDebug() > 5) Info("GetTrack","Event = %d Particle = %d",ev,idx);
923 if ( (ev<0) || (idx<0) )
925 Error("GetTrack","GetTrackEventIndex returned error");
928 if (GetDebug() > 5) Info("GetTrack","Number of Tracks in Event(%d) = %d",ev,cab->GetStack(ev)->GetNprimary());
929 return cab->GetStack(ev)->Particle(idx);//safe - in case stack does not exist
931 /*******************************************************************/
933 void AliGenHBTprocessor::GetTrackEventIndex(Int_t n, Int_t &evno, Int_t &index) const
935 //returns event(stack) number and particle index
936 AliGenerator* g = gAlice->Generator();
937 AliGenCocktailAfterBurner* cab = (g)?dynamic_cast<AliGenCocktailAfterBurner*>(g):0x0;
940 Fatal("GetTrackEventIndex","Master Generator is not an AliGenCocktailAfterBurner");
946 for (Int_t i = fActiveStack;i < fActiveStack+fEventMerge; i++)
948 AliStack* stack = cab->GetStack(i);
951 Error("GetTrackEventIndex","There is no stack %d",i);
955 Int_t ntracks = stack->GetNprimary();
956 if (GetDebug() > 10) Info("GetTrackEventIndex","Event %d has %d tracks. n = %d",i,ntracks,n);
970 Error("GetTrackEventIndex","Could not find given track");
973 /*******************************************************************/
974 /*******************************************************************/
975 /*******************************************************************/
981 void AliGenHBTprocessor::DefineParticles()
984 // Load standard numbers for GEANT particles and PDG conversion
985 fNPDGCodes = 0; //this is done in the constructor - but in any case ...
987 fPDGCode[fNPDGCodes++]=-99; // 0 = unused location
988 fPDGCode[fNPDGCodes++]=22; // 1 = photon
989 fPDGCode[fNPDGCodes++]=-11; // 2 = positron
990 fPDGCode[fNPDGCodes++]=11; // 3 = electron
991 fPDGCode[fNPDGCodes++]=12; // 4 = neutrino e
992 fPDGCode[fNPDGCodes++]=-13; // 5 = muon +
993 fPDGCode[fNPDGCodes++]=13; // 6 = muon -
994 fPDGCode[fNPDGCodes++]=111; // 7 = pi0
995 fPDGCode[fNPDGCodes++]=211; // 8 = pi+
996 fPDGCode[fNPDGCodes++]=-211; // 9 = pi-
997 fPDGCode[fNPDGCodes++]=130; // 10 = Kaon Long
998 fPDGCode[fNPDGCodes++]=321; // 11 = Kaon +
999 fPDGCode[fNPDGCodes++]=-321; // 12 = Kaon -
1000 fPDGCode[fNPDGCodes++]=2112; // 13 = Neutron
1001 fPDGCode[fNPDGCodes++]=2212; // 14 = Proton
1002 fPDGCode[fNPDGCodes++]=-2212; // 15 = Anti Proton
1003 fPDGCode[fNPDGCodes++]=310; // 16 = Kaon Short
1004 fPDGCode[fNPDGCodes++]=221; // 17 = Eta
1005 fPDGCode[fNPDGCodes++]=3122; // 18 = Lambda
1006 fPDGCode[fNPDGCodes++]=3222; // 19 = Sigma +
1007 fPDGCode[fNPDGCodes++]=3212; // 20 = Sigma 0
1008 fPDGCode[fNPDGCodes++]=3112; // 21 = Sigma -
1009 fPDGCode[fNPDGCodes++]=3322; // 22 = Xi0
1010 fPDGCode[fNPDGCodes++]=3312; // 23 = Xi-
1011 fPDGCode[fNPDGCodes++]=3334; // 24 = Omega-
1012 fPDGCode[fNPDGCodes++]=-2112; // 25 = Anti Proton
1013 fPDGCode[fNPDGCodes++]=-3122; // 26 = Anti Proton
1014 fPDGCode[fNPDGCodes++]=-3222; // 27 = Anti Sigma -
1015 fPDGCode[fNPDGCodes++]=-3212; // 28 = Anti Sigma 0
1016 fPDGCode[fNPDGCodes++]=-3112; // 29 = Anti Sigma 0
1017 fPDGCode[fNPDGCodes++]=-3322; // 30 = Anti Xi 0
1018 fPDGCode[fNPDGCodes++]=-3312; // 31 = Anti Xi +
1019 fPDGCode[fNPDGCodes++]=-3334; // 32 = Anti Omega +
1022 /*******************************************************************/
1023 Int_t AliGenHBTprocessor::IdFromPDG(Int_t pdg) const
1026 // Return Geant3 code from PDG and pseudo ENDF code
1028 for(Int_t i=0;i<fNPDGCodes;++i)
1029 if(pdg==fPDGCode[i]) return i;
1032 Int_t AliGenHBTprocessor::PDGFromId(Int_t id) const
1035 // Return PDG code and pseudo ENDF code from Geant3 code
1037 if(id>0 && id<fNPDGCodes) return fPDGCode[id];
1040 Double_t AliGenHBTprocessor::ThetaToEta(Double_t arg)
1042 //converts etha(azimuthal angle) to Eta (pseudorapidity). Argument in radians
1044 if(arg>= TMath::Pi()) return 708.0;//This number is the biggest wich not crashes exp(x)
1045 if(arg<= 0.0) return -708.0;//
1046 if(arg == TMath::Pi()/2.) return 0.0;//
1050 return TMath::Log( TMath::Tan(arg/2.)) ;
1054 return -TMath::Log( TMath::Tan(-arg/2.)) ;
1058 /*******************************************************************/
1059 /****** ROUTINES USED FOR COMMUNUCATION ********/
1060 /******************** WITH FORTRAN ********************/
1061 /*******************************************************************/
1064 # define hbtpran hbtpran_
1065 # define alihbtp_puttrack alihbtp_puttrack_
1066 # define alihbtp_gettrack alihbtp_gettrack_
1067 # define alihbtp_getnumberevents alihbtp_getnumberevents_
1068 # define alihbtp_getnumbertracks alihbtp_getnumbertracks_
1069 # define alihbtp_initialize alihbtp_initialize_
1070 # define alihbtp_setactiveeventnumber alihbtp_setactiveeventnumber_
1071 # define alihbtp_setparameters alihbtp_setparameters_
1072 # define type_ofCall
1075 # define hbtpran HBTPRAN
1076 # define alihbtp_puttrack ALIHBTP_PUTTRACK
1077 # define alihbtp_gettrack ALIHBTP_GETTRACK
1078 # define alihbtp_getnumberevents ALIHBTP_GETNUMBEREVENTS
1079 # define alihbtp_getnumbertracks ALIHBTP_GETNUMBERTRACKS
1080 # define alihbtp_initialize ALIHBTP_INITIALIZE
1081 # define alihbtp_setactiveeventnumber ALIHBTP_SETACTIVEEVENTNUMBER
1082 # define alihbtp_setparameters ALIHBTP_SETPARAMETERS
1083 # define type_ofCall _stdcall
1086 /*******************************************************************/
1088 AliGenCocktailAfterBurner* GetGenerator()
1090 // This function has two tasks:
1091 // Check if environment is OK (exist gAlice and generator)
1092 // Returns pointer to genrator
1093 //to be changed with TFolders
1097 ::Error("AliGenHBTprocessor.cxx: GetGenerator()",
1098 "There is NO gALICE! Check what you are doing!");
1099 ::Fatal("AliGenHBTprocessor.cxx: GetGenerator()",
1100 "Running HBT Processor without gAlice... Exiting \n");
1101 return 0x0;//pro forma
1103 AliGenerator * gen = gAlice->Generator();
1107 ::Fatal("AliGenHBTprocessor.cxx: GetGenerator()",
1108 "There is no generator in gAlice, exiting\n");
1112 //we do not sure actual type of the genetator
1113 //and simple casting is risky - we use ROOT machinery to do safe cast
1115 TClass* cabclass = AliGenCocktailAfterBurner::Class(); //get AliGenCocktailAfterBurner TClass
1116 TClass* genclass = gen->IsA();//get TClass of the generator we got from galice
1117 //use casting implemented in TClass
1118 //cast gen to cabclass
1119 AliGenCocktailAfterBurner* cab=(AliGenCocktailAfterBurner*)genclass->DynamicCast(cabclass,gen);
1121 if (cab == 0x0)//if generator that we got is not AliGenCocktailAfterBurner or its descendant we get null
1122 { //then quit with error
1123 ::Fatal("AliGenHBTprocessor.cxx: GetGenerator()",
1124 "The main Generator is not a AliGenCocktailAfterBurner, exiting\n");
1129 /*******************************************************************/
1131 AliGenHBTprocessor* GetAliGenHBTprocessor()
1133 //returns pointer to the current instance of AliGenHBTprocessor in
1134 //AliGenCocktailAfterBurner (can be more than one)
1136 AliGenCocktailAfterBurner* gen = GetGenerator();
1137 AliGenerator* g = gen->GetCurrentGenerator();
1140 ::Fatal("AliGenHBTprocessor.cxx: GetAliGenHBTprocessor()",
1141 "Can not get the current generator. Exiting");
1142 return 0x0;//pro forma
1145 TClass* hbtpclass = AliGenHBTprocessor::Class(); //get AliGenCocktailAfterBurner TClass
1146 TClass* gclass = g->IsA();//get TClass of the current generator we got from CAB
1147 AliGenHBTprocessor* hbtp = (AliGenHBTprocessor*)gclass->DynamicCast(hbtpclass,g);//try to cast
1150 ::Fatal("AliGenHBTprocessor.cxx: GetAliGenHBTprocessor()",
1151 "\nCurrernt generator in AliGenCocktailAfterBurner is not a AliGenHBTprocessor, exiting\n");
1157 /*******************************************************************/
1158 extern "C" void type_ofCall alihbtp_setparameters()
1163 extern "C" void type_ofCall alihbtp_initialize()
1168 /*******************************************************************/
1170 extern "C" void type_ofCall alihbtp_getnumberevents(Int_t &nev)
1172 //passes number of events to the fortran
1173 if(AliGenHBTprocessor::GetDebug())
1174 ::Info("AliGenHBTprocessor.cxx: alihbtp_getnumberevents","(%d) ....",nev);
1176 AliGenHBTprocessor* gen = GetAliGenHBTprocessor();//we dont check because it is done in function
1177 nev = gen->GetNumberOfEvents();
1179 if(AliGenHBTprocessor::GetDebug()>5)
1180 ::Info("AliGenHBTprocessor.cxx: alihbtp_getnumberevents","EXITED N Ev = %d",nev);
1183 /*******************************************************************/
1185 extern "C" void type_ofCall alihbtp_setactiveeventnumber(Int_t & nev)
1187 //sets active event in generator (AliGenCocktailAfterBurner)
1189 if(AliGenHBTprocessor::GetDebug()>5)
1190 ::Info("AliGenHBTpocessor.cxx: alihbtp_setactiveeventnumber","(%d)",nev);
1191 if(AliGenHBTprocessor::GetDebug()>0)
1192 ::Info("AliGenHBTpocessor.cxx: alihbtp_setactiveeventnumber","Asked for event %d",nev-1);
1194 AliGenHBTprocessor* gen = GetAliGenHBTprocessor();//we dont check because it is done in function
1196 gen->SetActiveEventNumber(nev - 1); //fortran numerates events from 1 to N
1198 if(AliGenHBTprocessor::GetDebug()>5)
1199 ::Info("AliGenHBTpocessor.cxx: alihbtp_setactiveeventnumber","EXITED returned %d",nev);
1201 /*******************************************************************/
1203 extern "C" void type_ofCall alihbtp_getnumbertracks(Int_t &ntracks)
1205 //passes number of particles in active event to the fortran
1206 if(AliGenHBTprocessor::GetDebug()>5)
1207 ::Info("AliGenHBTpocessor.cxx: alihbtp_getnumbertracks","(%d)",ntracks);
1209 AliGenHBTprocessor* gen = GetAliGenHBTprocessor();//we dont check because it is done in function
1211 ntracks = gen->GetNumberOfTracks();
1212 if(AliGenHBTprocessor::GetDebug()>5)
1213 ::Info("AliGenHBTpocessor.cxx: alihbtp_getnumbertracks","EXITED Ntracks = %d",ntracks);
1216 /*******************************************************************/
1218 extern "C" void type_ofCall
1219 alihbtp_puttrack(Int_t & n,Int_t& flag, Float_t& px,
1220 Float_t& py, Float_t& pz, Int_t& geantpid)
1222 //sets new parameters (momenta) in track number n
1223 // in the active event
1224 // n - number of the track in active event
1225 // flag - flag of the track
1226 // px,py,pz - momenta
1227 // geantpid - type of the particle - Geant Particle ID
1229 if(AliGenHBTprocessor::GetDebug()>5)
1230 ::Info("AliGenHBTpocessor.cxx: alihbtp_puttrack","(%d)",n);
1232 AliGenHBTprocessor* gen = GetAliGenHBTprocessor();//we dont check because it is done in function
1234 TParticle * track = gen->GetTrack(n-1);
1237 ::Error("AliGenHBTprocessor.cxx","Can not get track from AliGenHBTprocessor");
1241 //check to be deleted
1242 if (geantpid != (gen->IdFromPDG( track->GetPdgCode() )))
1244 ::Error("AliGenHBTprocessor.cxx: alihbtp_puttrack",
1245 "SOMETHING IS GOING BAD:\n GEANTPIDS ARE NOT THE SAME");
1248 if(AliGenHBTprocessor::GetDebug()>0)
1249 if (px != track->Px())
1250 ::Info("AliGenHBTprocessor.cxx: alihbtp_puttrack",
1251 "Px diff. = %f", px - track->Px());
1253 if(AliGenHBTprocessor::GetDebug()>3)
1254 ::Info("AliGenHBTprocessor.cxx: alihbtp_puttrack",
1255 "track->GetPdgCode() --> %d",track->GetPdgCode());
1259 Float_t m = track->GetMass();
1260 Float_t e = TMath::Sqrt(m*m+px*px+py*py+pz*pz);
1261 track->SetMomentum(px,py,pz,e);
1263 gen->SetHbtPStatusCode(flag,n-1);
1265 if(AliGenHBTprocessor::GetDebug()>5) ::Info("AliGenHBTprocessor.cxx: alihbtp_puttrack","EXITED ");
1268 /*******************************************************************/
1270 extern "C" void type_ofCall
1271 alihbtp_gettrack(Int_t & n,Int_t & flag, Float_t & px,
1272 Float_t & py, Float_t & pz, Int_t & geantpid)
1275 //passes track parameters to the fortran
1276 // n - number of the track in active event
1277 // flag - flag of the track
1278 // px,py,pz - momenta
1279 // geantpid - type of the particle - Geant Particle ID
1281 if(AliGenHBTprocessor::GetDebug()>5) ::Info("AliGenHBTprocessor.cxx: alihbtp_gettrack","(%d)",n);
1282 AliGenHBTprocessor* g = GetAliGenHBTprocessor();
1284 TParticle * track = g->GetTrack(n-1);
1286 flag = g->GetHbtPStatusCode(n-1);
1288 px = (Float_t)track->Px();
1289 py = (Float_t)track->Py();
1290 pz = (Float_t)track->Pz();
1292 geantpid = g->IdFromPDG( track->GetPdgCode() );
1294 if(AliGenHBTprocessor::GetDebug()>5) ::Info("AliGenHBTprocessor.cxx: alihbtp_gettrack","EXITED");
1297 /*******************************************************************/
1298 extern "C" Float_t type_ofCall hbtpran(Int_t &)
1300 //interface to the random number generator
1301 return gAliRandom->Rndm();
1304 /*******************************************************************/
1307 /*******************************************************************/