user_search.cpp

/*-------------------------------------------------------------------------------------*/
/*           example of a user search for the periodic function f(x)=sin(2x)           */
/*-------------------------------------------------------------------------------------*/
#include "nomad.hpp"
using namespace std;
using namespace NOMAD;

const double PI = 3.141592654;

/*------------------------------------------------*/
/*               The problem                      */
/*------------------------------------------------*/
/*       n=1, m=1                                 */
/*       the periodic function f(x)=sin(2x)       */
/*------------------------------------------------*/
class My_Evaluator : public Evaluator {

public:

  // ctor:
  My_Evaluator  ( const Parameters & p ) :
    Evaluator ( p ) {}

  // dtor:
  ~My_Evaluator ( void ) {}

  // evaluation of a point:
  bool eval_x ( Eval_Point          & x          ,
		const NOMAD::Double & h_max      ,
		bool                & count_eval   ) const {
    x.set_bb_output ( 0 , sin ( 2*x[0].value() ) );
    count_eval = true;
    return true;
  }
};

/*------------------------------------------------*/
/*                   user search                  */
/*------------------------------------------------*/
class My_Search : public Search {

public:

  // ctor:
  My_Search ( Parameters & p )
    : Search ( p , USER_SEARCH ) {}

  // dtor:
  ~My_Search ( void ) {}

  // the search:
  void search (  Mads              & mads           ,
		 int               & nb_search_pts  ,
		 bool              & stop           ,
		 stop_type         & stop_reason    ,
		 success_type      & success        ,
		 bool              & count_search   ,
		 const Eval_Point *& new_feas_inc   ,
		 const Eval_Point *& new_infeas_inc   );
};

/*-------------------*/
/*  the user search  */
/*-------------------*/
void My_Search::search ( Mads              & mads           ,
			 int               & nb_search_pts  ,
			 bool              & stop           ,
			 stop_type         & stop_reason    ,
			 success_type      & success        ,
			bool              & count_search   ,