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34825e2b | 1 | #ifndef ALIGENPARAM_H |
2 | #define ALIGENPARAM_H | |
3da30618 | 3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | /* $Id$ */ | |
7 | ||
6d4dd317 | 8 | // |
2ad38d56 | 9 | // Class to generate particles from using parametrized pT and y distributions. |
6d4dd317 | 10 | // Distributions are obtained from pointer to object of type AliGenLib. |
11 | // (For example AliGenMUONlib) | |
12 | // | |
13 | // andreas.morsch@cern.ch | |
14 | // | |
15 | ||
fff02fee | 16 | #include "AliGenMC.h" |
f87cfe57 | 17 | |
18 | class AliPythia; | |
19 | class TParticle; | |
b22ee262 | 20 | class AliGenLib; |
f87cfe57 | 21 | class TF1; |
22 | ||
34f60c01 | 23 | typedef enum { kAnalog, kNonAnalog} Weighting_t; |
fe4da5cc | 24 | //------------------------------------------------------------- |
fff02fee | 25 | class AliGenParam : public AliGenMC |
fe4da5cc | 26 | { |
34825e2b | 27 | public: |
28 | AliGenParam(); | |
34f60c01 | 29 | AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname = 0); |
2ad38d56 | 30 | AliGenParam(Int_t npart, Int_t param, const char* tname = 0, const char* name = 0); |
34f60c01 | 31 | AliGenParam(Int_t npart, Int_t param, |
34825e2b | 32 | Double_t (*PtPara)(Double_t*, Double_t*), |
33 | Double_t (*YPara )(Double_t*, Double_t*), | |
65fb704d | 34 | Int_t (*IpPara)(TRandom*) ); |
f87cfe57 | 35 | AliGenParam(const AliGenParam &Param); |
36 | ||
34825e2b | 37 | virtual ~AliGenParam(); |
38 | virtual void Generate(); | |
39 | virtual void Init(); | |
40 | // select particle type | |
34f60c01 | 41 | virtual void SetParam(Int_t param) {fParam = param;} |
34825e2b | 42 | // force decay type |
34f60c01 | 43 | virtual void SetWeighting(Weighting_t flag = kAnalog) {fAnalog = flag;} |
34f60c01 | 44 | virtual void SetDeltaPt(Float_t delta=0.01) {fDeltaPt = delta;} |
a595093b | 45 | virtual void SetDecayer(AliDecayer* decayer) {fDecayer = decayer;} |
dc1d768c | 46 | virtual void Draw(const char * opt); |
2ad38d56 | 47 | TF1 * GetPt() { return fPtPara;} |
48 | TF1 * GetY() {return fYPara;} | |
49 | Float_t GetRelativeArea(Float_t ptMin, Float_t ptMax, Float_t yMin, Float_t yMax, Float_t phiMin, Float_t phiMax); | |
50 | ||
f87cfe57 | 51 | AliGenParam & operator=(const AliGenParam & rhs); |
34825e2b | 52 | protected: |
53 | Double_t (*fPtParaFunc)(Double_t*, Double_t*); //! Pointer to Pt parametrisation function | |
54 | Double_t (*fYParaFunc )(Double_t*, Double_t*); //! Pointer to Y parametrisation function | |
65fb704d | 55 | Int_t (*fIpParaFunc )(TRandom*); //! Pointer to particle type parametrisation function |
c5c3e4b0 | 56 | TF1* fPtPara; // Transverse momentum parameterisation |
57 | TF1* fYPara; // Rapidity parameterisation | |
34f60c01 | 58 | Int_t fParam; // Parameterisation type |
4d9d5cbd | 59 | Float_t fdNdy0; // central multiplicity per event |
60 | Float_t fYWgt; // Y-weight | |
61 | Float_t fPtWgt; // Pt-weight | |
4d9d5cbd | 62 | Float_t fBias; // Biasing factor |
63 | Int_t fTrials; // Number of trials | |
34825e2b | 64 | Float_t fDeltaPt; // pT sampling in steps of fDeltaPt |
6c24ee7c | 65 | AliDecayer *fDecayer; // ! Pointer to pythia object for decays |
b7601ac4 | 66 | ClassDef(AliGenParam,1) // Generator using parameterised pt- and y-distribution |
fe4da5cc | 67 | }; |
68 | #endif | |
69 | ||
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