//--------------------------------------------------------------------------
//
//
// Copyright Information: See EvtGen/COPYRIGHT
//
// Environment:
//      This software is part of the EvtGen package developed jointly
//      for the BaBar and CLEO collaborations.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Module: EvtItgThreeCoeffFcn.hh
//
// Description:
//      Class describing a function with three vectors of coefficients. 
//
// Modification history:
//
//    Jane Tinslay                March 21, 2001       Module created
//
//------------------------------------------------------------------------

#ifndef EVTITTHREECOEFFFCN_HH
#define EVTITTHREECOEFFFCN_HH

#include <vector>

//-------------
// C Headers --
//-------------
extern "C" {
}

#include "EvtGenModels/EvtItgAbsFunction.hh"

class EvtItgThreeCoeffFcn: public EvtItgAbsFunction {

public:

  EvtItgThreeCoeffFcn( double (*theFunction)(double, const std::vector<double> &, const std::vector<double> &, const std::vector<double> &),
		       double lowerRange, double upperRange, const std::vector<double> &coeffs1, const std::vector<double> &coeffs2, const std::vector<double> &coeffs3);
  
 
  virtual ~EvtItgThreeCoeffFcn( );
  virtual void setCoeff(int, int, double);
  virtual double getCoeff(int, int);
  
protected:

  virtual double myFunction(double x) const;

private:
 
  // Data members
  double (*_myFunction)(double x, const std::vector<double> & coeffs1, const std::vector<double> & coeffs2, const std::vector<double> & coeffs3);

  // Note: if your class needs a copy constructor or an assignment operator, 
  //  make one of the following public and implement it.
   EvtItgThreeCoeffFcn( const EvtItgThreeCoeffFcn& );                //// Copy Constructor
  EvtItgThreeCoeffFcn& operator= ( const EvtItgThreeCoeffFcn& );    // Assignment op
  std::vector<double> _coeffs1;
  std::vector<double> _coeffs2;
  std::vector<double> _coeffs3;
  
};

#endif // EvtITGPTRFUNCTION_HH