scaled_sphere.h

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#ifndef HIGH_PRECISION_PSO_FUNCTION_SCALED_SPHERE_H_
#define HIGH_PRECISION_PSO_FUNCTION_SCALED_SPHERE_H_

#include "function/function.h"

namespace highprecisionpso {

class ScaledSphere: public Function {
public:
    ScaledSphere(double max_scale);
    ~ScaledSphere();
    mpf_t* Eval(const std::vector<mpf_t*> & pos);
    std::string GetName();
    mpf_t* DistanceTo1DLocalOptimum(const std::vector<mpf_t*> & pos, int d);

private:
    const double max_scale_;
    std::vector<mpf_t*> scales_cached_;
    unsigned int scales_cached_precision_;
};

class ScaledSphereFixed: public ScaledSphere {
public:
    ScaledSphereFixed();
};

class ScaledHadamardRotatedSphere: public Function {
public:
    ScaledHadamardRotatedSphere(double max_scale);
    ~ScaledHadamardRotatedSphere();
    mpf_t* Eval(const std::vector<mpf_t*> & pos);
    std::string GetName();
    mpf_t* DistanceTo1DLocalOptimum(const std::vector<mpf_t*> & pos, int d);

private:
    void InitMatrixCached(const std::vector<mpf_t*> & pos);
    const double max_scale_;
    std::vector<std::vector<mpf_t* > > matrix_cached_;
    unsigned int matrix_cached_precision_;
};

class ScaledHadamardRotatedSphereFixed: public ScaledHadamardRotatedSphere {
public:
    ScaledHadamardRotatedSphereFixed();
};

class ScaledSphereRand: public Function {
public:
    ScaledSphereRand(std::vector<std::string> rng_description);
    ~ScaledSphereRand();
    mpf_t* Eval(const std::vector<mpf_t*> & pos);
    std::string GetName();
    mpf_t* DistanceTo1DLocalOptimum(const std::vector<mpf_t*> & pos, int d);

private:
    const std::vector<std::string> rng_description_;
    std::vector<mpf_t*> scales_cached_;
    unsigned int scales_cached_precision_;
};

} // namespace highprecisionpso

#endif /* HIGH_PRECISION_PSO_FUNCTION_SCALED_SPHERE_H_ */