TSFunction2D.h

/*
 * TSFunction2D.h
 *
 *  Created on: Aug 5, 2014
 *      Author: Silvestro di Luise
 *              Silvestro.Di.Luise@cern.ch
 *
 */

#ifndef TSFUNCTION2D_H_
#define TSFUNCTION2D_H_


#include <TF2.h>
#include <TGraph.h>
#include <TGraph2D.h>

/*
 *
 */



#include "TSFunction1D.h"


class TSFunction2D: public TSFunction1D {

public:

    TSFunction2D() {};
    TSFunction2D(TString name, TString title);
    TSFunction2D(TString name, TString title, const TSVariable &var_x, const TSVariable &var_y);

    virtual ~TSFunction2D();

    //
    virtual double Eval(double x, double y=0) const;
    virtual double Eval() const;
    virtual double EvalFunc(double *x, double *p) const {return Eval(x[0],x[1]);}

    //TGraph* BuildGraph(int ntpx=100, double y=0) const {return 0;}
    //TGraph* BuildGraph(int ntps=100) const {return 0;}


    TGraph2D* BuildGraph2D(double xmin, double xmax, double ymin, double ymax,int nptx=100, int npty=100) const;
    TGraph2D* BuildGraph2D(int nptx=100, int npty=100) const;
    TF2* BuildTF2(TString name="",int npx=100, int npy=100) const;
    virtual double ComputeIntegral() const;
    virtual double ComputeIntegral(double xmin, double xmax, double ymin, double ymax) const;

    TString GetAxisTitles() const;

    void InitFuncs();

    virtual void SetVarY(const TSVariable &);
    const TSVariable* GetVariableY() const;


private:

    const TSVariable *fY;

protected:
    void fCacheY(double val) const {cached_y=val;}
    double fGetCachedY() const {return cached_y;}

    mutable TF2* fTF2;

protected:
    mutable double cached_y;

};

#endif /* TSFUNCTION2D_H_ */