Unique names for functions enforced.
[u/mrichter/AliRoot.git] / EVGEN / AliGenParam.h
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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//
9// Class to generate particles from using paramtrized pT and y distributions.
10// Distributions are obtained from pointer to object of type AliGenLib.
11// (For example AliGenMUONlib)
12//
13// andreas.morsch@cern.ch
14//
15
16#include "AliGenMC.h"
17
18class AliPythia;
19class TParticle;
20class AliGenLib;
21class TF1;
22
23typedef enum { kAnalog, kNonAnalog} Weighting_t;
24//-------------------------------------------------------------
25class AliGenParam : public AliGenMC
26{
27 public:
28 AliGenParam();
29 AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname = 0);
30 AliGenParam(Int_t npart, Int_t param, char* tname = 0);
31 AliGenParam(Int_t npart, Int_t param,
32 Double_t (*PtPara)(Double_t*, Double_t*),
33 Double_t (*YPara )(Double_t*, Double_t*),
34 Int_t (*IpPara)(TRandom*) );
35 AliGenParam(const AliGenParam &Param);
36
37 virtual ~AliGenParam();
38 virtual void Generate();
39 virtual void Init();
40 // select particle type
41 virtual void SetParam(Int_t param) {fParam = param;}
42 // force decay type
43 virtual void SetWeighting(Weighting_t flag = kAnalog) {fAnalog = flag;}
44 virtual void SetDeltaPt(Float_t delta=0.01) {fDeltaPt = delta;}
45 virtual void SetDecayer(AliDecayer* decayer) {fDecayer = decayer;}
46 virtual void Draw(const char * opt);
47 AliGenParam & operator=(const AliGenParam & rhs);
48 protected:
49 Double_t (*fPtParaFunc)(Double_t*, Double_t*); //! Pointer to Pt parametrisation function
50 Double_t (*fYParaFunc )(Double_t*, Double_t*); //! Pointer to Y parametrisation function
51 Int_t (*fIpParaFunc )(TRandom*); //! Pointer to particle type parametrisation function
52 TF1* fPtPara; // Transverse momentum parameterisation
53 TF1* fYPara; // Rapidity parameterisation
54 Int_t fParam; // Parameterisation type
55 Float_t fdNdy0; // central multiplicity per event
56 Float_t fYWgt; // Y-weight
57 Float_t fPtWgt; // Pt-weight
58 Float_t fBias; // Biasing factor
59 Int_t fTrials; // Number of trials
60 Float_t fDeltaPt; // pT sampling in steps of fDeltaPt
61 AliDecayer *fDecayer; // ! Pointer to pythia object for decays
62 ClassDef(AliGenParam,1) // Generator using parameterised pt- and y-distribution
63};
64#endif
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