[u/mrichter/AliRoot.git] / STEER / AliGenerator.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

//-----------------------------------------------------------------
//    Generate the final state of the interaction as the input
//    to the MonteCarlo
//    Author: A.Morsch
//-----------------------------------------------------------------
//Begin_Html
/*
<img src="picts/AliGeneratorClass.gif">
</pre>
<br clear=left>
<font size=+2 color=red>
<p>The responsible person for this module is
<a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>.
</font>
<pre>
*/
//End_Html
//                                                               //
///////////////////////////////////////////////////////////////////
#include <TGenerator.h>

#include "AliCollisionGeometry.h"
#include "AliConfig.h"
#include "AliGenerator.h"
#include "AliRun.h"
#include "AliStack.h"

ClassImp(AliGenerator)

TGenerator* AliGenerator::fgMCEvGen=0;

//_______________________________________________________________________
AliGenerator::AliGenerator():
  fThetaMin(0),
  fThetaMax(0),
  fPhiMin(0),
  fPhiMax(0),
  fPMin(0),
  fPMax(0),
  fPtMin(0),
  fPtMax(0),
  fYMin(0),
  fYMax(0),
  fVMin(3),
  fVMax(3),
  fNpart(0),
  fParentWeight(0),
  fChildWeight(0),
  fAnalog(0),
  fVertexSmear(kNoSmear),
  fVertexSource(kInternal),
  fCutVertexZ(0),
  fTrackIt(0),
  fOrigin(3),
  fOsigma(3),
  fVertex(3),
  fStack(0),
  fCollisionGeometry(0)
{
  //
  // Default constructor
  //
    if (gAlice) {
	if (gAlice->GetDebug()>0)
	    printf("\n AliGenerator Default Constructor\n\n");
	gAlice->SetGenerator(this);
    }

    SetThetaRange(); ResetBit(kThetaRange);
    SetPhiRange(); ResetBit(kPhiRange);
    SetMomentumRange(); ResetBit(kMomentumRange);
    SetPtRange(); ResetBit(kPtRange);
    SetYRange(); ResetBit(kYRange);
    SetNumberParticles();
    SetTrackingFlag();
    SetCutVertexZ();


    fOrigin[0]=fOrigin[1]=fOrigin[2]=0;
    fOsigma[0]=fOsigma[1]=fOsigma[2]=0;
    fVertex[0]=fVertex[1]=fVertex[2]=0;

    fVMin[0]=fVMin[1]=fVMin[2]=0;
    fVMax[0]=fVMax[1]=fVMax[2]=10000;
}

//_______________________________________________________________________
AliGenerator::AliGenerator(Int_t npart):
  fThetaMin(0),
  fThetaMax(0),
  fPhiMin(0),
  fPhiMax(0),
  fPMin(0),
  fPMax(0),
  fPtMin(0),
  fPtMax(0),
  fYMin(0),
  fYMax(0),
  fVMin(3),
  fVMax(3),
  fNpart(0),
  fParentWeight(0),
  fChildWeight(0),
  fAnalog(0),
  fVertexSmear(kNoSmear),
  fVertexSource(kInternal),
  fCutVertexZ(0),
  fTrackIt(0),
  fOrigin(3),
  fOsigma(3),
  fVertex(3),
  fStack(0),
  fCollisionGeometry(0)
{
  //
  // Standard constructor
  //
    if (gAlice) {
	if (gAlice->GetDebug()>0)
	    printf("\n AliGenerator Constructor initializing number of particles \n\n");
	gAlice->SetGenerator(this);
    }
    
    SetThetaRange(); ResetBit(kThetaRange);
    SetPhiRange(); ResetBit(kPhiRange);
    SetMomentumRange(); ResetBit(kMomentumRange);
    SetPtRange(); ResetBit(kPtRange);
    SetYRange(); ResetBit(kYRange);
    SetTrackingFlag();
    SetCutVertexZ();

    fOrigin[0]=fOrigin[1]=fOrigin[2]=0;
    fOsigma[0]=fOsigma[1]=fOsigma[2]=0;
    fVertex[0]=fVertex[1]=fVertex[2]=0;

    fVMin[0]=fVMin[1]=fVMin[2]=0;
    fVMax[0]=fVMax[1]=fVMax[2]=10000;

    SetNumberParticles(npart);

    AliConfig::Instance()->Add(this);
}

//_______________________________________________________________________
AliGenerator::AliGenerator(const AliGenerator &gen): 
  TNamed(gen),
  AliRndm(gen),
  fThetaMin(0),
  fThetaMax(0),
  fPhiMin(0),
  fPhiMax(0),
  fPMin(0),
  fPMax(0),
  fPtMin(0),
  fPtMax(0),
  fYMin(0),
  fYMax(0),
  fVMin(3),
  fVMax(3),
  fNpart(0),
  fParentWeight(0),
  fChildWeight(0),
  fAnalog(0),
  fVertexSmear(kNoSmear),
  fVertexSource(kInternal),
  fCutVertexZ(0),
  fTrackIt(0),
  fOrigin(3),
  fOsigma(3),
  fVertex(3),
  fStack(0)
{
  //
  // Copy constructor
  //
  gen.Copy(*this);
}

//_______________________________________________________________________
AliGenerator & AliGenerator::operator=(const AliGenerator &gen)
{
  //
  // Assignment operator
  //
  gen.Copy(*this);
  return (*this);
}

//_______________________________________________________________________
void AliGenerator::Copy(AliGenerator &/* gen */) const
{
  //
  // Copy *this onto gen
  //
  Fatal("Copy","Not implemented!\n");
}

//_______________________________________________________________________
AliGenerator::~AliGenerator()
{
  //
  // Destructor
  //
  fOrigin.Set(0);
  fOsigma.Set(0);
  if (fgMCEvGen) {
    delete fgMCEvGen;
    fgMCEvGen=0;
  }
}

//_______________________________________________________________________
void AliGenerator::Init()
{   
  //
  // Dummy initialisation
  //
}

//_______________________________________________________________________
void AliGenerator::SetOrigin(Float_t ox, Float_t oy, Float_t oz)
{
  //
  // Set the vertex for the generated tracks
  //
  fOrigin[0]=ox;
  fOrigin[1]=oy;
  fOrigin[2]=oz;
}

//_______________________________________________________________________
void AliGenerator::SetOrigin(const TLorentzVector &o)
{
  //
  // Set the vertex for the generated tracks
  //
  fOrigin[0]=o[0];
  fOrigin[1]=o[1];
  fOrigin[2]=o[2];
}

//_______________________________________________________________________
void AliGenerator::SetSigma(Float_t sx, Float_t sy, Float_t sz)
{
  //
  // Set the spread of the vertex
  //
  fOsigma[0]=sx;
  fOsigma[1]=sy;
  fOsigma[2]=sz;
}

//_______________________________________________________________________
void AliGenerator::SetMomentumRange(Float_t pmin, Float_t pmax)
{
  //
  // Set the momentum range for the generated particles
  //
  fPMin = pmin;
  fPMax = pmax;
  SetBit(kMomentumRange);
}

//_______________________________________________________________________
void AliGenerator::SetPtRange(Float_t ptmin, Float_t ptmax)
{
  //
  // Set the Pt range for the generated particles
  //
  fPtMin = ptmin;
  fPtMax = ptmax;
  SetBit(kPtRange);
}

//_______________________________________________________________________
void AliGenerator::SetPhiRange(Float_t phimin, Float_t phimax)
{
  //
  // Set the Phi range for the generated particles
  //
  fPhiMin = TMath::Pi()*phimin/180;
  fPhiMax = TMath::Pi()*phimax/180;
  SetBit(kPhiRange);
}

//_______________________________________________________________________
void AliGenerator::SetYRange(Float_t ymin, Float_t ymax)
{
  //
  // Set the Rapidity range for the generated particles
  //
  fYMin=ymin;
  fYMax=ymax;
  SetBit(kYRange);
}

//_______________________________________________________________________
void AliGenerator::SetVRange(Float_t vxmin, Float_t vxmax,
			     Float_t vymin, Float_t vymax,
			     Float_t vzmin, Float_t vzmax)
{
  //
  // Set the vertex range for the generated particles
  //
  fVMin[0]=vxmin; fVMin[1]=vymin; fVMin[2]=vzmin;
  fVMax[0]=vxmax; fVMax[1]=vymax; fVMax[2]=vzmax;
  SetBit(kVertexRange);
}

//_______________________________________________________________________
void AliGenerator::SetThetaRange(Float_t thetamin, Float_t thetamax)
{
  //
  // Set the theta range for the generated particles
  //
  fThetaMin = TMath::Pi()*thetamin/180;
  fThetaMax = TMath::Pi()*thetamax/180;
  SetBit(kThetaRange);
}

void AliGenerator::Vertex()
{
  //
  // Obtain vertex for current event from external source or calculated (internal)
  //
    if (fVertexSource == kInternal) {
	VertexInternal();
    } else if (fVertexSource == kContainer) {
	;
    } else if (fVertexSource == kExternal) {
	VertexExternal();
    }
}

//_______________________________________________________________________
void AliGenerator::VertexExternal()
{
    // Dummy !!!!!!
    // Obtain vertex from external source 
    //
    // Should be something like fVertex = gAlice->GetVertex()
    
    fVertex[0]=fVertex[1]=fVertex[2]=0;  
}

//_______________________________________________________________________
void AliGenerator::VertexInternal()
{
    // 
    // Obtain calculated vertex 
    // Default is gaussian smearing
    Float_t random[6];
    Float_t dv[3];
    Int_t j;
    
    dv[2] = 1.e10;
    while(TMath::Abs(dv[2]) > fCutVertexZ*fOsigma[2]) {
	Rndm(random,6);
	for (j=0; j < 3; j++) {
	    dv[j] = fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
		TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
	}
    }
    for (j=0; j < 3; j++) fVertex[j] = fOrigin[j] + dv[j];
    
}

//_______________________________________________________________________
void  AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg,
                               Float_t *pmom, Float_t *vpos, Float_t *polar,
                               Float_t tof, TMCProcess mech, Int_t &ntr,
                               Float_t weight, Int_t is)
{
  //
  // Loads one track on the stack
  //

  if (fStack)
    fStack->PushTrack(done, parent, pdg, pmom, vpos, polar, tof,
                     mech, ntr, weight, is);
  else 
    gAlice->PushTrack(done, parent, pdg, pmom, vpos, polar, tof,
                     mech, ntr, weight, is);
}

//_______________________________________________________________________
void  AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg,
                      Double_t px, Double_t py, Double_t pz, Double_t e,
                      Double_t vx, Double_t vy, Double_t vz, Double_t tof,
                      Double_t polx, Double_t poly, Double_t polz,
                      TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is)
{
  //
  // Loads one track on the stack
  //
  
  if (fStack)
     fStack->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof,
                      polx, poly, polz, mech, ntr, weight, is);
  else 
     gAlice->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof,
                        polx, poly, polz, mech, ntr, weight, is);
}


//_______________________________________________________________________
void AliGenerator:: KeepTrack(Int_t itrack)
{
  //
  // Declare a track permanent on the stack
  //
  if (fStack)
     fStack->KeepTrack(itrack);
  else 
     gAlice->KeepTrack(itrack);
   
}

//_______________________________________________________________________
void AliGenerator:: SetHighWaterMark(Int_t nt)
{
  //
  // Internal function to set the maximum index used in the stack
  //
  if (fStack)
     fStack->SetHighWaterMark(nt);
  else 
     gAlice->SetHighWaterMark(nt);
   
}
void AliGenerator::FinishRun()
{
    ;
}
Commit	Line	Data
	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	//-----------------------------------------------------------------
	19	// Generate the final state of the interaction as the input
	20	// to the MonteCarlo
	21	// Author: A.Morsch
	22	//-----------------------------------------------------------------
	23	//Begin_Html
	24	/*
	25	<img src="picts/AliGeneratorClass.gif">
	26	</pre>
	27	<br clear=left>
	28	<font size=+2 color=red>
	29	<p>The responsible person for this module is
	30	<a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>.
	31	</font>
	32	<pre>
	33	*/
	34	//End_Html
	35	// //
	36	///////////////////////////////////////////////////////////////////
	37	#include <TGenerator.h>
	38
	39	#include "AliCollisionGeometry.h"
	40	#include "AliConfig.h"
	41	#include "AliGenerator.h"
	42	#include "AliRun.h"
	43	#include "AliStack.h"
	44
	45	ClassImp(AliGenerator)
	46
	47	TGenerator* AliGenerator::fgMCEvGen=0;
	48
	49	//_______________________________________________________________________
	50	AliGenerator::AliGenerator():
	51	fThetaMin(0),
	52	fThetaMax(0),
	53	fPhiMin(0),
	54	fPhiMax(0),
	55	fPMin(0),
	56	fPMax(0),
	57	fPtMin(0),
	58	fPtMax(0),
	59	fYMin(0),
	60	fYMax(0),
	61	fVMin(3),
	62	fVMax(3),
	63	fNpart(0),
	64	fParentWeight(0),
	65	fChildWeight(0),
	66	fAnalog(0),
	67	fVertexSmear(kNoSmear),
	68	fVertexSource(kInternal),
	69	fCutVertexZ(0),
	70	fTrackIt(0),
	71	fOrigin(3),
	72	fOsigma(3),
	73	fVertex(3),
	74	fStack(0),
	75	fCollisionGeometry(0)
	76	{
	77	//
	78	// Default constructor
	79	//
	80	if (gAlice) {
	81	if (gAlice->GetDebug()>0)
	82	printf("\n AliGenerator Default Constructor\n\n");
	83	gAlice->SetGenerator(this);
	84	}
	85
	86	SetThetaRange(); ResetBit(kThetaRange);
	87	SetPhiRange(); ResetBit(kPhiRange);
	88	SetMomentumRange(); ResetBit(kMomentumRange);
	89	SetPtRange(); ResetBit(kPtRange);
	90	SetYRange(); ResetBit(kYRange);
	91	SetNumberParticles();
	92	SetTrackingFlag();
	93	SetCutVertexZ();
	94
	95
	96	fOrigin[0]=fOrigin[1]=fOrigin[2]=0;
	97	fOsigma[0]=fOsigma[1]=fOsigma[2]=0;
	98	fVertex[0]=fVertex[1]=fVertex[2]=0;
	99
	100	fVMin[0]=fVMin[1]=fVMin[2]=0;
	101	fVMax[0]=fVMax[1]=fVMax[2]=10000;
	102	}
	103
	104	//_______________________________________________________________________
	105	AliGenerator::AliGenerator(Int_t npart):
	106	fThetaMin(0),
	107	fThetaMax(0),
	108	fPhiMin(0),
	109	fPhiMax(0),
	110	fPMin(0),
	111	fPMax(0),
	112	fPtMin(0),
	113	fPtMax(0),
	114	fYMin(0),
	115	fYMax(0),
	116	fVMin(3),
	117	fVMax(3),
	118	fNpart(0),
	119	fParentWeight(0),
	120	fChildWeight(0),
	121	fAnalog(0),
	122	fVertexSmear(kNoSmear),
	123	fVertexSource(kInternal),
	124	fCutVertexZ(0),
	125	fTrackIt(0),
	126	fOrigin(3),
	127	fOsigma(3),
	128	fVertex(3),
	129	fStack(0),
	130	fCollisionGeometry(0)
	131	{
	132	//
	133	// Standard constructor
	134	//
	135	if (gAlice) {
	136	if (gAlice->GetDebug()>0)
	137	printf("\n AliGenerator Constructor initializing number of particles \n\n");
	138	gAlice->SetGenerator(this);
	139	}
	140
	141	SetThetaRange(); ResetBit(kThetaRange);
	142	SetPhiRange(); ResetBit(kPhiRange);
	143	SetMomentumRange(); ResetBit(kMomentumRange);
	144	SetPtRange(); ResetBit(kPtRange);
	145	SetYRange(); ResetBit(kYRange);
	146	SetTrackingFlag();
	147	SetCutVertexZ();
	148
	149	fOrigin[0]=fOrigin[1]=fOrigin[2]=0;
	150	fOsigma[0]=fOsigma[1]=fOsigma[2]=0;
	151	fVertex[0]=fVertex[1]=fVertex[2]=0;
	152
	153	fVMin[0]=fVMin[1]=fVMin[2]=0;
	154	fVMax[0]=fVMax[1]=fVMax[2]=10000;
	155
	156	SetNumberParticles(npart);
	157
	158	AliConfig::Instance()->Add(this);
	159	}
	160
	161	//_______________________________________________________________________
	162	AliGenerator::AliGenerator(const AliGenerator &gen):
	163	TNamed(gen),
	164	AliRndm(gen),
	165	fThetaMin(0),
	166	fThetaMax(0),
	167	fPhiMin(0),
	168	fPhiMax(0),
	169	fPMin(0),
	170	fPMax(0),
	171	fPtMin(0),
	172	fPtMax(0),
	173	fYMin(0),
	174	fYMax(0),
	175	fVMin(3),
	176	fVMax(3),
	177	fNpart(0),
	178	fParentWeight(0),
	179	fChildWeight(0),
	180	fAnalog(0),
	181	fVertexSmear(kNoSmear),
	182	fVertexSource(kInternal),
	183	fCutVertexZ(0),
	184	fTrackIt(0),
	185	fOrigin(3),
	186	fOsigma(3),
	187	fVertex(3),
	188	fStack(0)
	189	{
	190	//
	191	// Copy constructor
	192	//
	193	gen.Copy(*this);
	194	}
	195
	196	//_______________________________________________________________________
	197	AliGenerator & AliGenerator::operator=(const AliGenerator &gen)
	198	{
	199	//
	200	// Assignment operator
	201	//
	202	gen.Copy(*this);
	203	return (*this);
	204	}
	205
	206	//_______________________________________________________________________
	207	void AliGenerator::Copy(AliGenerator &/* gen */) const
	208	{
	209	//
	210	// Copy *this onto gen
	211	//
	212	Fatal("Copy","Not implemented!\n");
	213	}
	214
	215	//_______________________________________________________________________
	216	AliGenerator::~AliGenerator()
	217	{
	218	//
	219	// Destructor
	220	//
	221	fOrigin.Set(0);
	222	fOsigma.Set(0);
	223	if (fgMCEvGen) {
	224	delete fgMCEvGen;
	225	fgMCEvGen=0;
	226	}
	227	}
	228
	229	//_______________________________________________________________________
	230	void AliGenerator::Init()
	231	{
	232	//
	233	// Dummy initialisation
	234	//
	235	}
	236
	237	//_______________________________________________________________________
	238	void AliGenerator::SetOrigin(Float_t ox, Float_t oy, Float_t oz)
	239	{
	240	//
	241	// Set the vertex for the generated tracks
	242	//
	243	fOrigin[0]=ox;
	244	fOrigin[1]=oy;
	245	fOrigin[2]=oz;
	246	}
	247
	248	//_______________________________________________________________________
	249	void AliGenerator::SetOrigin(const TLorentzVector &o)
	250	{
	251	//
	252	// Set the vertex for the generated tracks
	253	//
	254	fOrigin[0]=o[0];
	255	fOrigin[1]=o[1];
	256	fOrigin[2]=o[2];
	257	}
	258
	259	//_______________________________________________________________________
	260	void AliGenerator::SetSigma(Float_t sx, Float_t sy, Float_t sz)
	261	{
	262	//
	263	// Set the spread of the vertex
	264	//
	265	fOsigma[0]=sx;
	266	fOsigma[1]=sy;
	267	fOsigma[2]=sz;
	268	}
	269
	270	//_______________________________________________________________________
	271	void AliGenerator::SetMomentumRange(Float_t pmin, Float_t pmax)
	272	{
	273	//
	274	// Set the momentum range for the generated particles
	275	//
	276	fPMin = pmin;
	277	fPMax = pmax;
	278	SetBit(kMomentumRange);
	279	}
	280
	281	//_______________________________________________________________________
	282	void AliGenerator::SetPtRange(Float_t ptmin, Float_t ptmax)
	283	{
	284	//
	285	// Set the Pt range for the generated particles
	286	//
	287	fPtMin = ptmin;
	288	fPtMax = ptmax;
	289	SetBit(kPtRange);
	290	}
	291
	292	//_______________________________________________________________________
	293	void AliGenerator::SetPhiRange(Float_t phimin, Float_t phimax)
	294	{
	295	//
	296	// Set the Phi range for the generated particles
	297	//
	298	fPhiMin = TMath::Pi()*phimin/180;
	299	fPhiMax = TMath::Pi()*phimax/180;
	300	SetBit(kPhiRange);
	301	}
	302
	303	//_______________________________________________________________________
	304	void AliGenerator::SetYRange(Float_t ymin, Float_t ymax)
	305	{
	306	//
	307	// Set the Rapidity range for the generated particles
	308	//
	309	fYMin=ymin;
	310	fYMax=ymax;
	311	SetBit(kYRange);
	312	}
	313
	314	//_______________________________________________________________________
	315	void AliGenerator::SetVRange(Float_t vxmin, Float_t vxmax,
	316	Float_t vymin, Float_t vymax,
	317	Float_t vzmin, Float_t vzmax)
	318	{
	319	//
	320	// Set the vertex range for the generated particles
	321	//
	322	fVMin[0]=vxmin; fVMin[1]=vymin; fVMin[2]=vzmin;
	323	fVMax[0]=vxmax; fVMax[1]=vymax; fVMax[2]=vzmax;
	324	SetBit(kVertexRange);
	325	}
	326
	327	//_______________________________________________________________________
	328	void AliGenerator::SetThetaRange(Float_t thetamin, Float_t thetamax)
	329	{
	330	//
	331	// Set the theta range for the generated particles
	332	//
	333	fThetaMin = TMath::Pi()*thetamin/180;
	334	fThetaMax = TMath::Pi()*thetamax/180;
	335	SetBit(kThetaRange);
	336	}
	337
	338	void AliGenerator::Vertex()
	339	{
	340	//
	341	// Obtain vertex for current event from external source or calculated (internal)
	342	//
	343	if (fVertexSource == kInternal) {
	344	VertexInternal();
	345	} else if (fVertexSource == kContainer) {
	346	;
	347	} else if (fVertexSource == kExternal) {
	348	VertexExternal();
	349	}
	350	}
	351
	352	//_______________________________________________________________________
	353	void AliGenerator::VertexExternal()
	354	{
	355	// Dummy !!!!!!
	356	// Obtain vertex from external source
	357	//
	358	// Should be something like fVertex = gAlice->GetVertex()
	359
	360	fVertex[0]=fVertex[1]=fVertex[2]=0;
	361	}
	362
	363	//_______________________________________________________________________
	364	void AliGenerator::VertexInternal()
	365	{
	366	//
	367	// Obtain calculated vertex
	368	// Default is gaussian smearing
	369	Float_t random[6];
	370	Float_t dv[3];
	371	Int_t j;
	372
	373	dv[2] = 1.e10;
	374	while(TMath::Abs(dv[2]) > fCutVertexZ*fOsigma[2]) {
	375	Rndm(random,6);
	376	for (j=0; j < 3; j++) {
	377	dv[j] = fOsigma[j]TMath::Cos(2random[2j]TMath::Pi())*
	378	TMath::Sqrt(-2TMath::Log(random[2j+1]));
	379	}
	380	}
	381	for (j=0; j < 3; j++) fVertex[j] = fOrigin[j] + dv[j];
	382
	383	}
	384
	385	//_______________________________________________________________________
	386	void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg,
	387	Float_t pmom, Float_t vpos, Float_t *polar,
	388	Float_t tof, TMCProcess mech, Int_t &ntr,
	389	Float_t weight, Int_t is)
	390	{
	391	//
	392	// Loads one track on the stack
	393	//
	394
	395	if (fStack)
	396	fStack->PushTrack(done, parent, pdg, pmom, vpos, polar, tof,
	397	mech, ntr, weight, is);
	398	else
	399	gAlice->PushTrack(done, parent, pdg, pmom, vpos, polar, tof,
	400	mech, ntr, weight, is);
	401	}
	402
	403	//_______________________________________________________________________
	404	void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg,
	405	Double_t px, Double_t py, Double_t pz, Double_t e,
	406	Double_t vx, Double_t vy, Double_t vz, Double_t tof,
	407	Double_t polx, Double_t poly, Double_t polz,
	408	TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is)
	409	{
	410	//
	411	// Loads one track on the stack
	412	//
	413
	414	if (fStack)
	415	fStack->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof,
	416	polx, poly, polz, mech, ntr, weight, is);
	417	else
	418	gAlice->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof,
	419	polx, poly, polz, mech, ntr, weight, is);
	420	}
	421
	422
	423	//_______________________________________________________________________
	424	void AliGenerator:: KeepTrack(Int_t itrack)
	425	{
	426	//
	427	// Declare a track permanent on the stack
	428	//
	429	if (fStack)
	430	fStack->KeepTrack(itrack);
	431	else
	432	gAlice->KeepTrack(itrack);
	433
	434	}
	435
	436	//_______________________________________________________________________
	437	void AliGenerator:: SetHighWaterMark(Int_t nt)
	438	{
	439	//
	440	// Internal function to set the maximum index used in the stack
	441	//
	442	if (fStack)
	443	fStack->SetHighWaterMark(nt);
	444	else
	445	gAlice->SetHighWaterMark(nt);
	446
	447	}
	448	void AliGenerator::FinishRun()
	449	{
	450	;
	451	}