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/*
 *  Copyright (C) 2007, 2009 Juan Pedro Bolívar Puente
 *
 *  This file is part of Psychosynth.
 *   
 *  Psychosynth 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.
 *
 *  Psychosynth is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef PSYNTH_VECTOR2D_H
#define PSYNTH_VECTOR2D_H

#include <iostream>

namespace psynth
{
namespace base
{

template<class T>
class vector_2d
{
    static const int NUM_D = 2;
public:
    T x;   
    T y;   
    vector_2d(T _x = 0, T _y = 0) :
        x(_x), y(_y)
        {}

    void set(T _x, T _y) {
        x = _x;
        y = _y;
    }

    T& operator[](size_t index) {
        return *(&x + index);
    }

    const T& operator[](size_t index) const {
        return *(&x + index);
    }

    T distance(const vector_2d& v) const {
        return sqrt (sqr_distance (v));
    }

    T sqr_distance(const vector_2d& v) const {
        return
            (v.x-x) * (v.x-x) +
            (v.y-y) * (v.y-y);
    }

    T length() const {
        return sqrt(x*x + y*y);
    }

    T sqr_length() const {
        return x*x + y*y;
    }
};

template<class T>
std::ostream& operator<< (std::ostream& os,
                          const psynth::base::vector_2d<T> v)
{
    os << v.x << " " << v.y;
    return os;
}

typedef vector_2d<float> vector_2f;

} /* namespace base */
} /* namespace psynth */

#endif /* PSYNTH_VECTOR2D */