111 lines
2 KiB
C++
111 lines
2 KiB
C++
export module math.vec2;
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import preliminary;
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export namespace lt::math {
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template<typename T = f32>
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requires(std::is_arithmetic_v<T>)
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struct vec2_impl
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{
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static constexpr auto num_elements = 2u;
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constexpr vec2_impl(): x(), y()
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{
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}
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constexpr explicit vec2_impl(T scalar): x(scalar), y(scalar)
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{
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}
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constexpr vec2_impl(T x, T y): x(x), y(y)
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{
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}
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[[nodiscard]] auto operator==(const vec2_impl<T> &other) const -> bool
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{
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return x == other.x && y == other.y;
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}
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[[nodiscard]] auto operator!=(const vec2_impl<T> &other) const -> bool
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{
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return !(*this == other);
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}
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[[nodiscard]] constexpr auto operator+(const vec2_impl<T> &other) const -> vec2_impl
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{
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return {
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x + other.x,
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y + other.y,
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};
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}
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[[nodiscard]] constexpr auto operator-(const vec2_impl<T> &other) const -> vec2_impl
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{
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return {
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x - other.x,
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y - other.y,
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};
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}
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[[nodiscard]] constexpr auto operator*(const vec2_impl<T> &other) const -> vec2_impl
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{
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return {
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x * other.x,
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y * other.y,
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};
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}
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[[nodiscard]] constexpr auto operator/(const vec2_impl<T> &other) const -> vec2_impl
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{
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return {
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x / other.x,
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y / other.y,
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};
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}
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[[nodiscard]] constexpr auto operator[](u8 idx) -> T &
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{
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debug_check(idx <= num_elements, "vec2 out of bound: {}", idx);
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return ((T *)this)[idx];
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}
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[[nodiscard]] constexpr auto operator[](u8 idx) const -> const T &
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{
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debug_check(idx < num_elements, "vec2 out of bound: {}", idx);
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return ((T *)this)[idx];
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}
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friend auto operator<<(std::ostream &stream, vec2_impl<T> value) -> std::ostream &
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{
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stream << value.x << ", " << value.y;
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return stream;
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}
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T x;
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T y;
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};
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using vec2 = vec2_impl<f32>;
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using ivec2 = vec2_impl<i32>;
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using uvec2 = vec2_impl<u32>;
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} // namespace lt::math
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export template<typename T>
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struct std::formatter<lt::math::vec2_impl<T>>
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{
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constexpr auto parse(std::format_parse_context &context)
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{
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return context.begin();
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}
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auto format(const lt::math::vec2_impl<T> &val, std::format_context &context) const
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{
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return std::format_to(context.out(), "{}, {}", val.x, val.y);
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}
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};
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