gradientFlow.h

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#ifndef GRADIENTFLOW_INCLUDED
#define GRADIENTFLOW_INCLUDED

#include "gradientFlow_RungeKutta_1st.h"
#include "gradientFlow_RungeKutta_2nd.h"
#include "gradientFlow_RungeKutta_3rd.h"
#include "gradientFlow_RungeKutta_4th.h"
#include "gradientFlow_AdaptiveRungeKutta.h"

#include "staple_lex.h"

#include "topologicalCharge.h"

#include "IO/bridgeIO.h"
using Bridge::vout;


class GradientFlow
{
 public:
  static const std::string class_name;

 protected:
  Bridge::VerboseLevel m_vl;

 private:
  int m_Norder_RK;
  double m_Estep;
  int m_Nprec;
  double m_tolerance;
  double m_safety;
  bool m_is_adaptive;

  Action *m_action;
  Staple_lex m_staple;

  GradientFlow_RungeKutta *m_impl;

 public:
  GradientFlow(Action *action);
  GradientFlow(unique_ptr<Action>& action);

  ~GradientFlow();

 private:
  // non-copyable
  GradientFlow(const GradientFlow&);
  GradientFlow& operator=(const GradientFlow&);

 public:
  void set_parameters(const Parameters& params);
  void set_parameters(const int Norder_RK,
                      const double Estep, const int Nprec,
                      const int adaptive,
                      const double tolerance, const double safety);  // backward compability
  void set_parameters(const int Norder_RK,
                      const double Estep, const int Nprec,
                      const bool adaptive,
                      const double tolerance, const double safety);
  void set_parameter_Norder_RK(const int order, const bool is_adaptive);

  void set_parameter_verboselevel(const Bridge::VerboseLevel vl) { m_vl = vl; }

  void initialize();

  double evolve(double& t, Field_G& U);

  double evolve(Field_G& U, int ntau);

  double evolve_wt_output(Field_G& U);

  double evolve_wo_output(Field_G& U);
};
#endif