Vector2.h

// This is adapted from SFML (https://github.com/SFML/SFML).
 
#ifndef GDCORE_VECTOR2_H
#define GDCORE_VECTOR2_H
 
namespace gd {
 
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2016 Laurent Gomila ([email protected])
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the
// use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
template <typename T>
class Vector2
{
public:
 
    inline Vector2() :
    x(0),
    y(0)
    {
 
    }
    inline Vector2(T X, T Y) :
    x(X),
    y(Y)
    {
 
    }
    template <typename U>
    inline explicit Vector2(const Vector2<U>& vector) :
    x(static_cast<T>(vector.x)),
    y(static_cast<T>(vector.y))
    {
    }
    // Member data
    T x; 
    T y; 
};
 
template <typename T>
inline Vector2<T> operator -(const Vector2<T>& right)
{
    return Vector2<T>(-right.x, -right.y);
}
 
template <typename T>
inline Vector2<T>& operator +=(Vector2<T>& left, const Vector2<T>& right)
{
    left.x += right.x;
    left.y += right.y;
 
    return left;
}
 
template <typename T>
inline Vector2<T>& operator -=(Vector2<T>& left, const Vector2<T>& right)
{
    left.x -= right.x;
    left.y -= right.y;
 
    return left;
}
 
template <typename T>
inline Vector2<T> operator +(const Vector2<T>& left, const Vector2<T>& right)
{
    return Vector2<T>(left.x + right.x, left.y + right.y);
}
 
template <typename T>
inline Vector2<T> operator -(const Vector2<T>& left, const Vector2<T>& right)
{
    return Vector2<T>(left.x - right.x, left.y - right.y);
}
 
template <typename T>
inline Vector2<T> operator *(const Vector2<T>& left, T right)
{
    return Vector2<T>(left.x * right, left.y * right);
}
 
template <typename T>
inline Vector2<T> operator *(T left, const Vector2<T>& right)
{
    return Vector2<T>(right.x * left, right.y * left);
}
 
template <typename T>
inline Vector2<T>& operator *=(Vector2<T>& left, T right)
{
    left.x *= right;
    left.y *= right;
 
    return left;
}
 
template <typename T>
inline Vector2<T> operator /(const Vector2<T>& left, T right)
{
    return Vector2<T>(left.x / right, left.y / right);
}
 
template <typename T>
inline Vector2<T>& operator /=(Vector2<T>& left, T right)
{
    left.x /= right;
    left.y /= right;
 
    return left;
}
 
template <typename T>
inline bool operator ==(const Vector2<T>& left, const Vector2<T>& right)
{
    return (left.x == right.x) && (left.y == right.y);
}
 
template <typename T>
inline bool operator !=(const Vector2<T>& left, const Vector2<T>& right)
{
    return (left.x != right.x) || (left.y != right.y);
}
 
// Define the most common types
typedef Vector2<int>          Vector2i;
typedef Vector2<unsigned int> Vector2u;
typedef Vector2<float>        Vector2f;
 
} // namespace gd
 
 
#endif // GDCORE_VECTOR2_H