MegaSteve/Math.ixx

module;
#include <d2d1.h>
#include <concepts>

export module Math;

export
{
    struct Vector2 : D2D1_POINT_2F
    {

    };
    struct Rect : D2D1_RECT_F
    {
        Vector2 size() const&
        {
            return { right - left, bottom - top };
        }
    };

    inline bool isIntersection(const Rect& lhs, const Rect& rhs)
    {
        auto ox1 = (lhs.left + lhs.right) * 0.5f;
        auto oy1 = (lhs.top + lhs.bottom) * 0.5f;
        auto ox2 = (rhs.left + rhs.right) * 0.5f;
        auto oy2 = (rhs.top + rhs.bottom) * 0.5f;

        auto rx1 = abs(lhs.right - lhs.left) * 0.5f;
        auto ry1 = abs(lhs.top - lhs.bottom) * 0.5f;
        auto rx2 = abs(rhs.right - rhs.left) * 0.5f;
        auto ry2 = abs(rhs.top - rhs.bottom) * 0.5f;

        return ((abs(ox1 - ox2) - (rx1 + rx2)) < -20.f) && ((abs(oy1 - oy2) - (ry1 + ry2)) < -20.f);
    }
}