Vector2D.cpp

#include "Vector2D.h"

Vector2D::Vector2D()
{
    m_x = 0;
    m_y = 0;
}

Vector2D::Vector2D(float x, float y)
{
    m_x = x;
    m_y = y;
}

Vector2D Vector2D::operator+(const Vector2D& v2)
{
    return Vector2D(m_x + v2.m_x, m_y + v2.m_y);
}

Vector2D Vector2D::operator+=(const Vector2D& v2)
{
    m_x += v2.m_x;
    m_y += v2.m_y;

    return *this; //we return the self object.
}

Vector2D Vector2D::operator-(const Vector2D& v2)
{
    return Vector2D(m_x - v2.m_x, m_y - v2.m_y);
}

Vector2D Vector2D::operator-=(const Vector2D& v2)
{
    m_x -= v2.m_x;
    m_y -= v2.m_y;

    return *this;
}

Vector2D Vector2D::operator*(float scalar)
{
    return Vector2D(m_x * scalar, m_y * scalar);
}

Vector2D Vector2D::operator*=(float scalar)
{
    m_x *= scalar;
    m_y *= scalar;

    return *this;
}

Vector2D Vector2D::operator/(float scalar)
{
    return Vector2D(m_x / scalar, m_y / scalar);
}

Vector2D Vector2D::operator/=(float scalar)
{
    m_x /= scalar;
    m_y /= scalar;

    return *this;
}

float Vector2D::getX() const
{
    return m_x;
}

float Vector2D::getY() const
{
    return m_y;
}

float Vector2D::length() const
{
    return sqrt(m_x * m_x + m_y * m_y);
}

void Vector2D::setX(float x)
{
    m_x = x;
}

void Vector2D::setY(float y)
{
    m_y = y;
}

void Vector2D::normalize()
{
    float aux_length = length();
    if (aux_length > 0) //don't divide 0!
    {
        (*this) *= 1 / aux_length;
    }
}