vec2.h

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#ifndef NNGN_MATH_VEC2_H
#define NNGN_MATH_VEC2_H
 
#include <cstdint>
 
#include "vec.h"
 
namespace nngn {
 
template<typename T>
struct vec2_base : public vec<vec2_base, T, 2> {
    T x, y;
    constexpr vec2_base() = default;
    explicit constexpr vec2_base(T v) : x(v), y(v) {}
    constexpr vec2_base(T p_x, T p_y) : x(p_x), y(p_y) {}
#define S(v0, v1) \
    constexpr vec2_base<T> v0 ## v1() const { return {this->v0, this->v1}; }
    S(x,x) S(x,y)
    S(y,x) S(y,y)
#undef S
};
 
template<typename T>
struct vec_type<T, 2> : std::type_identity<vec2_base<T>> {};
 
using ivec2 = vec2_base<std::int32_t>;
using uvec2 = vec2_base<std::uint32_t>;
using zvec2 = vec2_base<std::size_t>;
using vec2 = vec2_base<float>;
using dvec2 = vec2_base<double>;
 
static_assert(offsetof(ivec2, y) == sizeof(ivec2::type));
static_assert(offsetof(uvec2, y) == sizeof(uvec2::type));
static_assert(offsetof( vec2, y) == sizeof( vec2::type));
static_assert(offsetof(dvec2, y) == sizeof(dvec2::type));
 
}
 
#endif