[u/mrichter/AliRoot.git] / EVGEN / AliGenParam.h

#ifndef ALIGENPARAM_H
#define ALIGENPARAM_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

/* $Id$ */

#include "AliGenMC.h"
#include <TArrayI.h>

class AliPythia;
class TParticle;
class AliGenLib;
class TF1;

typedef enum { kAnalog, kNonAnalog} Weighting_t;
//-------------------------------------------------------------
class AliGenParam : public AliGenMC
{
 public:
    AliGenParam();
    AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname = 0);
    AliGenParam(Int_t npart, Int_t param, char* tname = 0);
    AliGenParam(Int_t npart, Int_t param,
		Double_t (*PtPara)(Double_t*, Double_t*),
		Double_t (*YPara )(Double_t*, Double_t*),
		Int_t    (*IpPara)(TRandom*)           );
    AliGenParam(const AliGenParam &Param);
     
    virtual ~AliGenParam();
    virtual void Generate();
    virtual void Init();
    // select particle type
    virtual void SetParam(Int_t param) {fParam = param;}
    // force decay type
    virtual void SetWeighting(Weighting_t flag = kAnalog) {fAnalog = flag;}	
    virtual void SetDeltaPt(Float_t delta=0.01) {fDeltaPt = delta;}
    
    AliGenParam & operator=(const AliGenParam & rhs);
 protected:
    Double_t (*fPtParaFunc)(Double_t*, Double_t*); //! Pointer to Pt parametrisation function
    Double_t (*fYParaFunc )(Double_t*, Double_t*); //! Pointer to Y parametrisation function
    Int_t    (*fIpParaFunc )(TRandom*);    //! Pointer to particle type parametrisation function
    TF1* fPtPara;              // Transverse momentum parameterisation
    TF1* fYPara;               // Rapidity parameterisation
    Int_t       fParam;        // Parameterisation type 
    Float_t     fdNdy0;        // central multiplicity per event
    Float_t     fYWgt;         // Y-weight
    Float_t     fPtWgt;        // Pt-weight
    Float_t     fBias;         // Biasing factor
    Int_t       fTrials;       // Number of trials
    Float_t     fDeltaPt;      // pT sampling in steps of fDeltaPt
    AliDecayer  *fDecayer;     // ! Pointer to pythia object for decays
  ClassDef(AliGenParam,1) // Generator using parameterised pt- and y-distribution
};
#endif
Commit	Line	Data
	1	#ifndef ALIGENPARAM_H
	2	#define ALIGENPARAM_H
	3	/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	4	* See cxx source for full Copyright notice */
	5
	6	/* $Id$ */
	7
	8	#include "AliGenMC.h"
	9	#include <TArrayI.h>
	10
	11	class AliPythia;
	12	class TParticle;
	13	class AliGenLib;
	14	class TF1;
	15
	16	typedef enum { kAnalog, kNonAnalog} Weighting_t;
	17	//-------------------------------------------------------------
	18	class AliGenParam : public AliGenMC
	19	{
	20	public:
	21	AliGenParam();
	22	AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname = 0);
	23	AliGenParam(Int_t npart, Int_t param, char* tname = 0);
	24	AliGenParam(Int_t npart, Int_t param,
	25	Double_t (PtPara)(Double_t, Double_t*),
	26	Double_t (YPara )(Double_t, Double_t*),
	27	Int_t (IpPara)(TRandom) );
	28	AliGenParam(const AliGenParam &Param);
	29
	30	virtual ~AliGenParam();
	31	virtual void Generate();
	32	virtual void Init();
	33	// select particle type
	34	virtual void SetParam(Int_t param) {fParam = param;}
	35	// force decay type
	36	virtual void SetWeighting(Weighting_t flag = kAnalog) {fAnalog = flag;}
	37	virtual void SetDeltaPt(Float_t delta=0.01) {fDeltaPt = delta;}
	38
	39	AliGenParam & operator=(const AliGenParam & rhs);
	40	protected:
	41	Double_t (fPtParaFunc)(Double_t, Double_t*); //! Pointer to Pt parametrisation function
	42	Double_t (fYParaFunc )(Double_t, Double_t*); //! Pointer to Y parametrisation function
	43	Int_t (fIpParaFunc )(TRandom); //! Pointer to particle type parametrisation function
	44	TF1* fPtPara; // Transverse momentum parameterisation
	45	TF1* fYPara; // Rapidity parameterisation
	46	Int_t fParam; // Parameterisation type
	47	Float_t fdNdy0; // central multiplicity per event
	48	Float_t fYWgt; // Y-weight
	49	Float_t fPtWgt; // Pt-weight
	50	Float_t fBias; // Biasing factor
	51	Int_t fTrials; // Number of trials
	52	Float_t fDeltaPt; // pT sampling in steps of fDeltaPt
	53	AliDecayer *fDecayer; // ! Pointer to pythia object for decays
	54	ClassDef(AliGenParam,1) // Generator using parameterised pt- and y-distribution
	55	};
	56	#endif
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