[u/mrichter/AliRoot.git] / EPOS / AliGenEpos.cxx

/*
 * AliGenEpos.cxx
 *
 *  ALICE event generator based on EPOS model from Klaus Werner
 *
 *  Created on: Feb 28, 2009
 *      Author: Piotr Ostrowski, postrow@if.pw.edu.pl
 */

#include "AliGenEpos.h"
#include "TEpos.h"
#include "TParticle.h"
#include "TMath.h"
#include "AliLog.h"
#include "AliGenEventHeader.h"
#include "AliGenEposEventHeader.h"

ClassImp(AliGenEpos)

AliGenEpos::AliGenEpos() : AliGenMC(),
		fBmin(0),
		fBmax(10000),
		fPhiMin(0),
		fPhiMax(TMath::TwoPi()),
		fFilterModelOutput(kFALSE) {
	SetMC(new TEpos());
}

AliGenEpos::AliGenEpos(Int_t npart) : AliGenMC(npart),
		fBmin(0),
		fBmax(10000),
		fPhiMin(0),
		fPhiMax(TMath::TwoPi()),
		fFilterModelOutput(kFALSE) {
	SetMC(new TEpos());
}

void AliGenEpos::Init() {
	AliGenMC::Init();
	TEpos *epos = GetTEpos();
	epos->SetLaproj(this->fZProjectile);
	epos->SetMaproj(this->fAProjectile);
	epos->SetLatarg(this->fZTarget);
	epos->SetMatarg(this->fATarget);
	epos->SetPhimin(this->fPhiMin);
	epos->SetPhimax(this->fPhiMax);
	epos->SetBminim(this->fBmin);
	epos->SetBmaxim(this->fBmax);
	epos->SetEcms(this->fEnergyCMS);
	GetTEpos()->Initialize();
}

void AliGenEpos::Generate() {
	  Float_t polar[3]   =   {0,0,0};
	  Float_t origin0[3]  =   {0,0,0};
	  Float_t origin[3]   =   {0,0,0};
	  fNprimaries = 0;
	  Int_t nt  = 0; //output parameter for PushTrack

	  Vertex();
	  for (int j=0; j < 3; j++) origin0[j] = fVertex[j];

	  // Generate one event

	  GetTEpos()->GenerateEvent();
	  AliWarning("Generated");
	  GetTEpos()->ImportParticles(&fParticles);

	  Int_t np = fParticles.GetEntriesFast();
	  AliWarning(Form("Imported %d particles", np));

	  Int_t *idsOnStack = NULL;
	  idsOnStack = new Int_t[np];
	  TParticle *iparticle;

	  for (int i = 0; i < np; i++) {
		  iparticle = (TParticle *) fParticles.At(i);
		  //Bool_t isNullEntry = iparticle->GetStatusCode() == 0;
		  //Bool_t isCommentOrUnknown = iparticle->GetStatusCode() > 2;
		  Bool_t hasDecayed = iparticle->GetStatusCode() >= 2;
		  Bool_t isFinalState = iparticle->GetStatusCode() == 1;
		  Int_t imo = iparticle->GetFirstMother();
		  Bool_t  hasMother = (imo >=0);


		  if (isFinalState) {
			  origin[0] = iparticle->Vx();
			  origin[1] = iparticle->Vy();
			  origin[2] = iparticle->Vz();
			  //doubled track with freeze out coordinates for femtoscopy
			  PushTrack(0,
					  imo>=0?idsOnStack[imo]:-1,
					  iparticle->GetPdgCode(),
				iparticle->Px(),iparticle->Py(),iparticle->Pz(),iparticle->Energy(),
				origin[0], origin[1], origin[2],
				iparticle->T(),
				polar[0],polar[1],polar[2],
				hasMother ? kPDecay:kPNoProcess,nt);

		      idsOnStack[i] = nt;
		      fNprimaries++;
		      KeepTrack(nt);

		      //real track with smeared vertex
		      origin[0] += origin0[0];
		      origin[1] += origin0[1];
		      origin[2] += origin0[2];
			  PushTrack(1,
					  nt,   //doubled track as mother
					  iparticle->GetPdgCode(),
				iparticle->Px(),iparticle->Py(),iparticle->Pz(),iparticle->Energy(),
				origin[0], origin[1], origin[2],
				iparticle->T(),
				polar[0],polar[1],polar[2],
				kPDecay,nt);
		      fNprimaries++;
		      KeepTrack(nt);
		  } else if(hasDecayed || !fFilterModelOutput) {
			  // don't track it and don't smear vertex
			  origin[0] = iparticle->Vx();
			  origin[1] = iparticle->Vy();
			  origin[2] = iparticle->Vz();
			  PushTrack(0,
					  imo>=0?idsOnStack[imo]:-1,
					  iparticle->GetPdgCode(),
				iparticle->Px(),iparticle->Py(),iparticle->Pz(),iparticle->Energy(),
				origin[0], origin[1], origin[2],
				iparticle->T(),
				polar[0],polar[1],polar[2],
				hasMother ? kPDecay:kPNoProcess,nt);
		      idsOnStack[i] = nt;
		      fNprimaries++;
		      KeepTrack(nt);
		  } else if(fFilterModelOutput) {
			  //filtered internal model objects
			  idsOnStack[i] = -1; // to erase mother field in its dauthers
		  }
	  }
	  SetHighWaterMark(fNprimaries);
	  TArrayF eventVertex;
	  eventVertex.Set(3);
	  eventVertex[0] = origin0[0];
	  eventVertex[1] = origin0[1];
	  eventVertex[2] = origin0[2];
	// Builds the event header, to be called after each event
	  AliGenEposEventHeader* header = new AliGenEposEventHeader("EPOS");

	  header->SetNProduced(fNprimaries);
	  header->SetPrimaryVertex(eventVertex);

	  header->SetImpactParameter(GetTEpos()->GetBimevt());
	  header->SetReactionPlaneAngle(GetTEpos()->GetPhievt());

	  header->SetHardScatters(0);
	  header->SetParticipants(GetTEpos()->GetNpjevt(), GetTEpos()->GetNtgevt());
	  header->SetCollisions(GetTEpos()->GetKolevt(), 0, 0, GetTEpos()->GetNpjevt());
	  header->SetSpectators(GetTEpos()->GetJpnevt(), GetTEpos()->GetJppevt(), GetTEpos()->GetJtnevt(), GetTEpos()->GetJtpevt());

	// Event Vertex
	  header->SetPrimaryVertex(fVertex);
	  header->FillInternalFields(GetTEpos());
	  AddHeader(header);
	  fCollisionGeometry = (AliGenEposEventHeader*)  header;

	  delete[] idsOnStack;
}

AliGenEpos::~AliGenEpos() {
}
Commit	Line	Data
9ef1c2d9	1	/*
879c2333	2	* AliGenEpos.cxx
9ef1c2d9	3	*
	4	* ALICE event generator based on EPOS model from Klaus Werner
	5	*
	6	* Created on: Feb 28, 2009
	7	* Author: Piotr Ostrowski, postrow@if.pw.edu.pl
	8	*/
	9
	10	#include "AliGenEpos.h"
	11	#include "TEpos.h"
	12	#include "TParticle.h"
879c2333	13	#include "TMath.h"
9ef1c2d9	14	#include "AliLog.h"
	15	#include "AliGenEventHeader.h"
	16	#include "AliGenEposEventHeader.h"
	17
	18	ClassImp(AliGenEpos)
	19
	20	AliGenEpos::AliGenEpos() : AliGenMC(),
	21	fBmin(0),
	22	fBmax(10000),
	23	fPhiMin(0),
879c2333	24	fPhiMax(TMath::TwoPi()),
9ef1c2d9	25	fFilterModelOutput(kFALSE) {
	26	SetMC(new TEpos());
	27	}
	28
	29	AliGenEpos::AliGenEpos(Int_t npart) : AliGenMC(npart),
	30	fBmin(0),
	31	fBmax(10000),
	32	fPhiMin(0),
879c2333	33	fPhiMax(TMath::TwoPi()),
9ef1c2d9	34	fFilterModelOutput(kFALSE) {
	35	SetMC(new TEpos());
	36	}
	37
	38	void AliGenEpos::Init() {
	39	AliGenMC::Init();
	40	TEpos *epos = GetTEpos();
	41	epos->SetLaproj(this->fZProjectile);
	42	epos->SetMaproj(this->fAProjectile);
	43	epos->SetLatarg(this->fZTarget);
	44	epos->SetMatarg(this->fATarget);
	45	epos->SetPhimin(this->fPhiMin);
	46	epos->SetPhimax(this->fPhiMax);
	47	epos->SetBminim(this->fBmin);
	48	epos->SetBmaxim(this->fBmax);
	49	epos->SetEcms(this->fEnergyCMS);
	50	GetTEpos()->Initialize();
	51	}
	52
	53	void AliGenEpos::Generate() {
	54	Float_t polar[3] = {0,0,0};
	55	Float_t origin0[3] = {0,0,0};
	56	Float_t origin[3] = {0,0,0};
879c2333	57	fNprimaries = 0;
9ef1c2d9	58	Int_t nt = 0; //output parameter for PushTrack
	59
	60	Vertex();
	61	for (int j=0; j < 3; j++) origin0[j] = fVertex[j];
	62
	63	// Generate one event
	64
	65	GetTEpos()->GenerateEvent();
	66	AliWarning("Generated");
	67	GetTEpos()->ImportParticles(&fParticles);
	68
	69	Int_t np = fParticles.GetEntriesFast();
	70	AliWarning(Form("Imported %d particles", np));
	71
	72	Int_t *idsOnStack = NULL;
	73	idsOnStack = new Int_t[np];
	74	TParticle *iparticle;
	75
	76	for (int i = 0; i < np; i++) {
	77	iparticle = (TParticle *) fParticles.At(i);
	78	//Bool_t isNullEntry = iparticle->GetStatusCode() == 0;
	79	//Bool_t isCommentOrUnknown = iparticle->GetStatusCode() > 2;
879c2333	80	Bool_t hasDecayed = iparticle->GetStatusCode() >= 2;
9ef1c2d9	81	Bool_t isFinalState = iparticle->GetStatusCode() == 1;
	82	Int_t imo = iparticle->GetFirstMother();
	83	Bool_t hasMother = (imo >=0);
	84
	85
	86	if (isFinalState) {
	87	origin[0] = iparticle->Vx();
	88	origin[1] = iparticle->Vy();
	89	origin[2] = iparticle->Vz();
	90	//doubled track with freeze out coordinates for femtoscopy
	91	PushTrack(0,
	92	imo>=0?idsOnStack[imo]:-1,
	93	iparticle->GetPdgCode(),
	94	iparticle->Px(),iparticle->Py(),iparticle->Pz(),iparticle->Energy(),
	95	origin[0], origin[1], origin[2],
	96	iparticle->T(),
	97	polar[0],polar[1],polar[2],
	98	hasMother ? kPDecay:kPNoProcess,nt);
	99
	100	idsOnStack[i] = nt;
	101	fNprimaries++;
	102	KeepTrack(nt);
	103
	104	//real track with smeared vertex
	105	origin[0] += origin0[0];
	106	origin[1] += origin0[1];
	107	origin[2] += origin0[2];
	108	PushTrack(1,
	109	nt, //doubled track as mother
	110	iparticle->GetPdgCode(),
	111	iparticle->Px(),iparticle->Py(),iparticle->Pz(),iparticle->Energy(),
	112	origin[0], origin[1], origin[2],
	113	iparticle->T(),
	114	polar[0],polar[1],polar[2],
	115	kPDecay,nt);
	116	fNprimaries++;
	117	KeepTrack(nt);
	118	} else if(hasDecayed \|\| !fFilterModelOutput) {
	119	// don't track it and don't smear vertex
	120	origin[0] = iparticle->Vx();
	121	origin[1] = iparticle->Vy();
	122	origin[2] = iparticle->Vz();
	123	PushTrack(0,
	124	imo>=0?idsOnStack[imo]:-1,
	125	iparticle->GetPdgCode(),
	126	iparticle->Px(),iparticle->Py(),iparticle->Pz(),iparticle->Energy(),
	127	origin[0], origin[1], origin[2],
	128	iparticle->T(),
	129	polar[0],polar[1],polar[2],
	130	hasMother ? kPDecay:kPNoProcess,nt);
	131	idsOnStack[i] = nt;
	132	fNprimaries++;
	133	KeepTrack(nt);
	134	} else if(fFilterModelOutput) {
	135	//filtered internal model objects
	136	idsOnStack[i] = -1; // to erase mother field in its dauthers
	137	}
	138	}
	139	SetHighWaterMark(fNprimaries);
	140	TArrayF eventVertex;
	141	eventVertex.Set(3);
	142	eventVertex[0] = origin0[0];
	143	eventVertex[1] = origin0[1];
	144	eventVertex[2] = origin0[2];
145	// Builds the event header, to be called after each event
146	AliGenEposEventHeader* header = new AliGenEposEventHeader("EPOS");
147
148	header->SetNProduced(fNprimaries);
149	header->SetPrimaryVertex(eventVertex);
150
151	header->SetImpactParameter(GetTEpos()->GetBimevt());
152	header->SetReactionPlaneAngle(GetTEpos()->GetPhievt());
153
154	header->SetHardScatters(0);
155	header->SetParticipants(GetTEpos()->GetNpjevt(), GetTEpos()->GetNtgevt());
156	header->SetCollisions(GetTEpos()->GetKolevt(), 0, 0, GetTEpos()->GetNpjevt());
157	header->SetSpectators(GetTEpos()->GetJpnevt(), GetTEpos()->GetJppevt(), GetTEpos()->GetJtnevt(), GetTEpos()->GetJtpevt());
158
159	// Event Vertex
160	header->SetPrimaryVertex(fVertex);
879c2333	161	header->FillInternalFields(GetTEpos());
9ef1c2d9	162	AddHeader(header);
	163	fCollisionGeometry = (AliGenEposEventHeader*) header;
	164
	165	delete[] idsOnStack;
	166	}
	167
	168	AliGenEpos::~AliGenEpos() {
	169	}
	170