namespace PaintDotNet.Data.SurfacePlot
{
    class Misc
    {
        static string fm(int len, int val)
        {
            string s = "" + val;
            while (s.Length < len)
            {
                s = " " + s;
            }
            return s;
        }
        static string fm(int len, double val)
        {
            string s = "" + val;
            while (s.Length < len)
            {
                s = s + " ";
            }
            return s;
        }

        public static bool inside(int[] p, int[] p1, int[] p2, int[] p3)
        {
            int x = p[0];
            int y = p[1];
            int x1 = p1[0];
            int y1 = p1[1];
            int x2 = p2[0];
            int y2 = p2[1];
            int x3 = p3[0];
            int y3 = p3[1];

            int a = (x2 - x1) * (y - y1) - (y2 - y1) * (x - x1);
            int b = (x3 - x2) * (y - y2) - (y3 - y2) * (x - x2);
            int c = (x1 - x3) * (y - y3) - (y1 - y3) * (x - x3);

            if ((a >= 0 && b >= 0 && c >= 0) || (a <= 0 && b <= 0 && c <= 0))
                return true;
            else
                return false;
        }

        static bool inside(int x, int y, int x1, int y1, int x2, int y2, int x3, int y3)
        {
            int a = (x2 - x1) * (y - y1) - (y2 - y1) * (x - x1);
            int b = (x3 - x2) * (y - y2) - (y3 - y2) * (x - x2);
            int c = (x1 - x3) * (y - y3) - (y1 - y3) * (x - x3);

            if ((a >= 0 && b >= 0 && c >= 0) || (a <= 0 && b <= 0 && c <= 0))
                return true;
            else
                return false;
        }
    }
}