integrator_Leapfrog.h

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#ifndef INTEGRATOR_LEAPFROG_INCLUDED
#define INTEGRATOR_LEAPFROG_INCLUDED

#include "action.h"
#include "director.h"
#include "integrator.h"
#include "randomNumbers.h"

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


//- parameters class
class Parameters_Integrator_Leapfrog : virtual public Parameters
{
 public:
  Parameters_Integrator_Leapfrog();
};
//- end

class Integrator_Leapfrog : public Integrator
{
 public:
  static const std::string class_name;

 private:
  int m_level;             // level number
  int m_Nstep;             // number of steps

  Integrator *m_update_p;  // momentum updator
  Integrator *m_update_u;  // link variable updator or next level integrator

 public:

  Integrator_Leapfrog(Integrator *update_p, Integrator *update_u)
    : m_level(0), m_Nstep(0),
      m_update_p(update_p), m_update_u(update_u)
  {
  }

  ~Integrator_Leapfrog()
  {
  }

  void set_parameters(const Parameters& params);
  void set_parameters(int level, int nstep);

  void set_parameter_level(const int level);

  void set_parameter_nstep(const int nstep);
  void set_parameter_nsteps(const std::vector<int>& nsteps);


  void evolve(const double step_size, Field_G& iP, Field_G& U);

  // cache management
  void invalidate_cache()
  {
    m_update_p->invalidate_cache();
    m_update_u->invalidate_cache();
  }
};
#endif