Vector2d.h

#ifndef __Vector2d__
#define __Vector2d__

#include <math.h>
#include <iostream>
#include <vector>
#include <utility>

class Vector2d
{
    public:
    Vector2d(float x, float y) : m_x(x), m_y(y) {}

    float getX() { return m_x; }
    float getY() { return m_y; }

    void setX(float x) { m_x = x; }
    void setY(float y) { m_y = y; }

    float length() { return sqrt(m_x * m_x + m_y * m_y) ; }

    Vector2d operator+ (const Vector2d& v2) const
    {
    return Vector2d (m_x + v2.m_x, m_y + v2.m_y);
    }

    friend Vector2d& operator +=(Vector2d& v1, Vector2d& v2)
    {
        v1.m_x += v2.m_x;
        v1.m_y += v2.m_y;

        return v1;
    }

    Vector2d operator* (float scalar)
    {
        return Vector2d(m_x * scalar, m_y * scalar);
    }

    Vector2d& operator*= (float scalar)
    {
        m_x *= scalar;
        m_y *= scalar;

        return *this;
    }

    Vector2d operator- (const Vector2d& v2) const
    {
        return Vector2d(m_x - v2.m_x, m_y - v2.m_y);
    }

    friend Vector2d& operator-=(Vector2d& v1, const Vector2d& v2)
    {
        v1.m_x -= v2.m_x;
        v1.m_y -= v2.m_y;

        return v1;

    }

    Vector2d operator/(float scalar)
    {
        return Vector2d(m_x / scalar, m_y / scalar);
    }

    Vector2d& operator/=(float scalar)
    {
        m_x /= scalar;
        m_y /= scalar;

        return *this;
    }

    void normalize()
    {
        float l = length();
        if ( l > 0 )
        {
            (*this) *= l/1;
        }
    }

    private:

    std::vector<std::pair<Vector2d*, Vector2d*>> m_joystickValues;

    float m_x;
    float m_y;
};

#endif /*defined (Vector2D) */