numerics.hpp

#pragma once
 
#include <plugify/vector.hpp>
#include <plugify/string.hpp>
 
namespace plg {
    PLUGIFY_WARN_PUSH()
 
#if defined(__clang__)
    PLUGIFY_WARN_IGNORE("-Wgnu-anonymous-struct")
    PLUGIFY_WARN_IGNORE("-Wnested-anon-types")
#elif defined(__GNUC__)
    PLUGIFY_WARN_IGNORE("-Wpedantic")
#elif defined(_MSC_VER)
    PLUGIFY_WARN_IGNORE(4201)
#endif
 
    extern "C" {
        struct vec2 {
            union {
                struct {
                    float x;
                    float y;
                };
                float data[2];
            };
        };
 
        struct vec3 {
            union {
                struct {
                    float x;
                    float y;
                    float z;
                };
                float data[3];
            };
        };
 
        struct vec4 {
            union {
                struct {
                    float x;
                    float y;
                    float z;
                    float w;
                };
                float data[4];
            };
        };
 
        struct mat4x4 {
            union {
                struct {
                    float m00, m01, m02, m03;
                    float m10, m11, m12, m13;
                    float m20, m21, m22, m23;
                    float m30, m31, m32, m33;
                };
                float m[4][4];
                float data[16];
            };
        };
    }
 
    PLUGIFY_WARN_POP()
 
    constexpr bool operator==(const vec2& lhs, const vec2& rhs) {
        return lhs.x == rhs.x && lhs.y == rhs.y;
    }
 
    constexpr bool operator==(const vec3& lhs, const vec3& rhs) {
        return lhs.x == rhs.x && lhs.y == rhs.y && lhs.z == rhs.z;
    }
 
    constexpr bool operator==(const vec4& lhs, const vec4& rhs) {
        return lhs.x == rhs.x && lhs.y == rhs.y && lhs.z == rhs.z && lhs.w == rhs.w;
    }
 
    constexpr bool operator==(const mat4x4& lhs, const mat4x4& rhs) {
        for (int i = 0; i < 16; ++i) {
            if (lhs.data[i] != rhs.data[i])
                return false;
        }
        return true;
    }
} // namespace plg