OpenCVLib2.MainForm.euclidean C# (CSharp) Method

        public void euclidean()
        {
            int jarak = (int)Math.Sqrt(Math.Pow((openx - closex), 2) + Math.Pow((openy - closey), 2));
            if (jarak < 50)
                showROI = true;
            else
                openy = openx = closex = closey = 0;
        }