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#pragma once
#include <cstddef>
#include <cstdint>
#include <functional>
struct Vector2Options
{
std::int32_t x;
std::int32_t y;
};
/**
* A 2D Vector.
*/
class Vector2
{
public:
using Value = std::int32_t;
constexpr explicit Vector2(const Vector2Options &options) noexcept
: _x(options.x), _y(options.y)
{
}
[[nodiscard]] auto get_x() const noexcept -> Value;
void set_x(Value x) noexcept;
[[nodiscard]] auto get_y() const noexcept -> Value;
void set_y(Value y) noexcept;
[[nodiscard]] auto
to_direction(const Vector2 &direction, Vector2::Value amount) const noexcept
-> Vector2;
auto operator+=(const Vector2 &rhs) noexcept -> const Vector2 &;
auto operator-=(const Vector2 &rhs) noexcept -> const Vector2 &;
auto operator+(const Vector2 &rhs) const noexcept -> Vector2;
auto operator-(const Vector2 &rhs) const noexcept -> Vector2;
auto operator*(const Vector2 &rhs) const noexcept -> Vector2;
auto operator==(const Vector2 &rhs) const noexcept -> bool;
auto operator<(const Vector2 &rhs) const noexcept -> bool;
/**
* Returns Vector2({.x = 0, .y = 1})
*/
static constexpr auto up() noexcept -> Vector2
{
return Vector2({.x = 0, .y = 1});
}
/**
* Returns Vector2({.x = 0, .y = -1})
*/
static constexpr auto down() noexcept -> Vector2
{
return Vector2({.x = 0, .y = -1});
}
/**
* Returns Vector2({.x = -1, .y = 0})
*/
static constexpr auto left() noexcept -> Vector2
{
return Vector2({.x = -1, .y = 0});
}
/**
* Returns Vector2({.x = 1, .y = 0})
*/
static constexpr auto right() noexcept -> Vector2
{
return Vector2({.x = 1, .y = 0});
}
private:
Value _x;
Value _y;
};
class Vector2Hasher
{
public:
auto operator()(const Vector2 &vector2) const noexcept -> std::size_t;
};
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