using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;

public partial class LDforma : System.Web.UI.Page
{
    static int R = 5;

    static int centerX = R;
    static int centerY = R;

    protected void Page_Load(object sender, EventArgs e)
    {
        Table1.Visible = false;
        Label2.Text = R.ToString();
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Rasymas();
    }

    private void Rasymas()
    {
        using (StreamWriter writer = new StreamWriter(Server.MapPath("App_Data/U3rez.txt")))
        {
            writer.WriteLine(" Circle radius is {0}", R);

            writer.WriteLine("The matrix is:");


            Table1.Visible = true;

            int[][] grid = new int[2 * R][];

            for (int i = 0; i < 2 * R; i++)
                grid[i] = new int[2 * R];

            int counter = 1;

            for (int y = 0; y < 2 * R; y++)
            {
                for (int x = 0; x < 2 * R; x++)
                {
                    int cornerX = x >= R ? x + 1 : x;
                    int cornerY = y >= R ? y + 1 : y;
                    if (distToCenter(cornerX, cornerY) <= R)
                    {
                        grid[y][x] = counter++;
                    }
                }
            }

            for (int y = 0; y < 2 * R; y++)
            {
                TableRow row = new TableRow();
                Table1.Rows.Add(row);

                for (int x = 0; x < 2 * R; x++)
                {
                    writer.Write(String.Format("{0, 3}", grid[y][x]) + " ");

                    TableCell cell = new TableCell();
                    cell.Text = grid[y][x].ToString();
                    row.Cells.Add(cell);
                }
                writer.WriteLine();
            }
        }
    }

    private static double distToCenter(int x, int y)
    {
        return Math.Sqrt(Math.Pow(x - centerX, 2) + Math.Pow(y - centerY, 2));
    }
}