#ifndef ALIGENPARAM_H
#define ALIGENPARAM_H
#include "AliGenMC.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, const AliGenLib * Library, Int_t param, const char* tname = 0);
AliGenParam(Int_t npart, Int_t param, const char* tname = 0, const char* name = 0);
AliGenParam(Int_t npart, Int_t param,
Double_t (*PtPara)(const Double_t*, const Double_t*),
Double_t (*YPara )(const Double_t*, const Double_t*),
Double_t (*V2Para)(const Double_t*, const Double_t*),
Int_t (*IpPara)(TRandom*) );
virtual ~AliGenParam();
virtual void GenerateN(Int_t ntimes);
virtual void Generate();
virtual void Init();
virtual void SetParam(Int_t param) {fParam = param;}
void SetSelectAll(Bool_t selectall) {fSelectAll = selectall;}
virtual void SetWeighting(Weighting_t flag = kAnalog) {fAnalog = flag;}
virtual void SetDeltaPt(Float_t delta=0.01) {fDeltaPt = delta;}
virtual void SetDecayer(AliDecayer* decayer) {fDecayer = decayer;}
virtual void SetForceGammaConversion(Bool_t force=kTRUE) {fForceConv = force;}
virtual void SetKeepParent(Bool_t keep=kTRUE){fKeepParent= keep;}
virtual void SetKeepIfOneChildSelected(Bool_t keep=kTRUE){fKeepIfOneChildSelected = keep;}
virtual void Draw(const char * opt);
TF1 * GetPt() { return fPtPara;}
TF1 * GetY() {return fYPara;}
Float_t GetRelativeArea(Float_t ptMin, Float_t ptMax, Float_t yMin, Float_t yMax, Float_t phiMin, Float_t phiMax);
static TVector3 OrthogonalVector(TVector3 &inVec);
static void RotateVector(Double_t *pin, Double_t *pout, Double_t costheta, Double_t sintheta,
Double_t cosphi, Double_t sinphi);
static double ScreenFunction1(double d);
static double ScreenFunction2(double d);
double RandomEnergyFraction(double Z, double E);
double RandomPolarAngle();
double RandomMass(Double_t mh);
Int_t VirtualGammaPairProduction(TClonesArray *particles, Int_t nPart);
Int_t ForceGammaConversion(TClonesArray *particles, Int_t nPart);
protected:
Double_t (*fPtParaFunc)(const Double_t*, const Double_t*);
Double_t (*fYParaFunc )(const Double_t*, const Double_t*);
Int_t (*fIpParaFunc )(TRandom*);
Double_t (*fV2ParaFunc )(const Double_t*, const Double_t*);
TF1* fPtPara;
TF1* fYPara;
TF1* fV2Para;
TF1* fdNdPhi;
Int_t fParam;
Float_t fdNdy0;
Float_t fYWgt;
Float_t fPtWgt;
Float_t fBias;
Int_t fTrials;
Float_t fDeltaPt;
Bool_t fSelectAll;
AliDecayer *fDecayer;
Bool_t fForceConv;
Bool_t fKeepParent;
Bool_t fKeepIfOneChildSelected;
private:
AliGenParam(const AliGenParam &Param);
AliGenParam & operator=(const AliGenParam & rhs);
ClassDef(AliGenParam, 2)
};
#endif