判断矩形重叠

//矩形结构
struct Rect{
    int leftTopX;//左上角横坐标
    int leftTopY;//左上角纵坐标
    int rightBottomX;//右下角横坐标
    int rightBottomY;//右下角纵坐标
};


bool CrossLine(const Rect &r1, const Rect &r2)
{
    return abs((r1.leftTopX + r1.rightBottomX) - (r2.leftTopX + r2.rightBottomX)) < (abs(r1.rightBottomX + r2.rightBottomX - r1.leftTopX - r2.leftTopX))
        && abs((r1.leftTopY + r1.rightBottomY) - (r2.leftTopY + r2.rightBottomY)) < (abs(r1.rightBottomY + r2.rightBottomY - r1.leftTopY - r2.leftTopY));
}