ScaleFunction.hpp

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#ifndef MEDUSA_BITS_APPROXIMATIONS_SCALEFUNCTION_HPP_
#define MEDUSA_BITS_APPROXIMATIONS_SCALEFUNCTION_HPP_
 
#include <medusa/Config.hpp>
#include <medusa/bits/types/Range.hpp>
#include <iosfwd>
 
namespace mm {
 
class ScaleToClosest {
  public:
    template<typename vec_t>
    static inline typename vec_t::scalar_t scale(const vec_t& p,
                                                 const std::vector<vec_t>& support) {
        return (p - support[1]).norm();
    }
    inline friend std::ostream& operator<<(std::ostream& os, const ScaleToClosest& /* scale */) {
        return os << "ScaleToClosest";
    }
};
 
class ScaleToFarthest {
  public:
    template<typename vec_t>
    static inline typename vec_t::scalar_t scale(const vec_t& p,
                                                 const std::vector<vec_t>& support) {
        return (p - support.back()).norm();
    }
    inline friend std::ostream& operator<<(std::ostream& os, const ScaleToFarthest& /* scale */) {
        return os << "ScaleToFarthest";
    }
};
 
class NoScale {
  public:
    template<typename vec_t>
    static inline typename vec_t::scalar_t scale(
            const vec_t& /* p */, const std::vector<vec_t>& /* support */) { return 1.0; }
    inline friend std::ostream& operator<<(std::ostream& os, const NoScale& /* scale */) {
        return os << "NoScale";
    }
};
 
}  // namespace mm
 
#endif  // MEDUSA_BITS_APPROXIMATIONS_SCALEFUNCTION_HPP_