C# 判断两个矩形是否相交

源代码

public bool JudgeRectangleIntersect(double RecAleftX, double RecAleftY, double RecArightX, double RecArightY,
        double RecBleftX, double RecBleftY, double RecBrightX, double RecBrightY)
        {
            bool isIntersect = false;
            try
            {
                double zx = getAbsluteValue(RecAleftX + RecArightX - RecBleftX - RecBrightX);
                double x = getAbsluteValue(RecAleftX - RecArightX) + getAbsluteValue(RecBleftX - RecBrightX);
                double zy = getAbsluteValue(RecAleftY + RecArightY - RecBleftY - RecBrightY);
                double y = getAbsluteValue(RecAleftY - RecArightY) + getAbsluteValue(RecBleftY - RecBrightY);

                if (zx <= x && zy <= y)  //需要确认两矩形边线重合是否定义为相交 此处定义为相交。
                {
                    isIntersect = true;
                }
            }
            catch (Exception ex)
            {
                string str = ex.Message;
            }
            return isIntersect;
        }

        private double getAbsluteValue(double douValue)
        {
            if (douValue >= )
            {
                return douValue;
            }
            else
            {
                return douValue * -;
            }
        }