EuclideanDistance.h

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2007-2009 Soeren Sonnenburg
 * Copyright (C) 2007-2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#ifndef _EUCLIDEANDISTANCE_H__
#define _EUCLIDEANDISTANCE_H__

#include <shogun/lib/config.h>

#include <shogun/lib/common.h>
#include <shogun/distance/RealDistance.h>
#include <shogun/features/DenseFeatures.h>

namespace shogun
{
class CEuclideanDistance: public CRealDistance
{
    public:
        CEuclideanDistance();

        CEuclideanDistance(CDenseFeatures<float64_t>* l, CDenseFeatures<float64_t>* r);
        virtual ~CEuclideanDistance();

        virtual bool init(CFeatures* l, CFeatures* r);

        virtual void cleanup();

        virtual EDistanceType get_distance_type() { return D_EUCLIDEAN; }

        virtual EFeatureType get_feature_type() { return F_DREAL; }

        virtual const char* get_name() const { return "EuclideanDistance"; }

        virtual bool get_disable_sqrt() { return disable_sqrt; };

        virtual void set_disable_sqrt(bool state) { disable_sqrt=state; };

        virtual float64_t distance_upper_bounded(int32_t idx_a, int32_t idx_b, float64_t upper_bound);

    protected:
        virtual float64_t compute(int32_t idx_a, int32_t idx_b);

    private:
        void init();

    protected:
        bool disable_sqrt;
};

} // namespace shogun
#endif /* _EUCLIDEANDISTANCE_H__ */