single_different_direction.h

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#ifndef HIGH_PRECISION_PSO_FUNCTION_SINGLE_DIFFERENT_DIRECTION_H_
#define HIGH_PRECISION_PSO_FUNCTION_SINGLE_DIFFERENT_DIRECTION_H_

#include "function/function.h"

namespace highprecisionpso {

enum SingleDifferentDirectionMode { 
    SINGLE_DIFFERENT_DIRECTION_MODE_FIRST,
    SINGLE_DIFFERENT_DIRECTION_MODE_DIAGONAL, 
    SINGLE_DIFFERENT_DIRECTION_MODE_RANDOM };

class SingleDifferentDirection: public Function {
public:
    SingleDifferentDirection(double single_dimension_exponent = 2.0,
            double remaining_dimension_exponent = 2.0,
            SingleDifferentDirectionMode mode = SINGLE_DIFFERENT_DIRECTION_MODE_FIRST,
            std::vector<std::string> rng_description = std::vector<std::string>(0));
    ~SingleDifferentDirection();
    mpf_t* Eval(const std::vector<mpf_t*> & pos);
    std::string GetName();

private:
    void InitSpecialDirection(const std::vector<mpf_t*> & vec);
    const double single_dimension_exponent_;
    const double remaining_dimension_exponent_;
    const SingleDifferentDirectionMode direction_mode_;
    const std::vector<std::string> rng_description_;
    std::vector<mpf_t*> special_direction_cached_;
    unsigned int special_direction_cached_precision_;
};

} // namespace highprecisionpso

#endif /* HIGH_PRECISION_PSO_FUNCTION_SINGLE_DIFFERENT_DIRECTION_H_ */