zero_finder.hpp

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#pragma once
// ------------------------------------------------------------------------ //
// This source file is part of the 'ESA Advanced Concepts Team's            //
// Space Mechanics Toolbox' software.                                       //
//                                                                          //
// The source files are for research use only,                              //
// and are distributed WITHOUT ANY WARRANTY. Use them on your own risk.     //
//                                                                          //
// Copyright (c) 2004-2007 European Space Agency                            //
// ------------------------------------------------------------------------ //

namespace zero_finder
{
class Function1D
{
public:
  // virtual double Compute(double x)=0;
  virtual double operator()(double x) = 0;
  // parameters
  double p1, p2;
  void SetParameters(double a, double b);
};

class Function1D_7param
{
public:
  // virtual double Compute(double x)=0;
  virtual double operator()(double x) = 0;
  // parameters
  double p1, p2, p3, p4, p5, p6, p7;
  void SetParameters(double a, double b, double c, double d, double e, double f,
                     double g);
};

class FZero
{
private:
  double a, c; // lower and upper bound

public:
  FZero(double a, double b); // constructor
  // fzero procedure
  double FindZero(Function1D &f);
  double FindZero7(Function1D_7param &f);
  void SetBounds(double a, double b);
};
} // namespace zero_finder