SamplingHeur.h

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//
//     Minotaur -- It's only 1/2 bull
//
//     (C)opyright 2008 - 2025 The Minotaur Team.
//
 
#ifndef MINOTAURSAMPLINGHEUR_H
#define MINOTAURSAMPLINGHEUR_H
 
#include "Heuristic.h"
#include "Types.h"
 
namespace Minotaur
{
class Problem;
struct SamplingHeurStats {
  UInt numSol;  // Number of solutions found
  double time;  // Time taken in this heuristic
  UInt checked; // Number of points checked
};
 
class SamplingHeur : public Heuristic
{
public:
  SamplingHeur(EnvPtr env, ProblemPtr p);
 
  ~SamplingHeur();
 
  void solve(NodePtr, RelaxationPtr, SolutionPoolPtr s_pool);
 
  void writeStats(std::ostream& out) const;
 
private:
  // Environment
  EnvPtr env_;
 
  // Maximum random solutions to check
  UInt maxRand_;
 
  // For printing messages
  static const std::string me_;
 
  // Problem
  ProblemPtr p_;
 
  // Statistics
  SamplingHeurStats* stats_;
 
  // get new point from a feasible point
  void getNewPoint_(double* x, double* xl, double* xu, SolutionPoolPtr s_pool);
 
  // Check whether x is feasible
  bool isFeasible_(const double* x);
};
 
typedef SamplingHeur* SamplingHeurPtr;
} // namespace Minotaur
#endif