Koch

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace koch
{
    public partial class Form1 : Form
    {
        Graphics g;
        int count = 0;
        double distance;
        double distanceKis;
        PointF Kpont;
        PointF Lpont;
        PointF Mpont;

        public Form1()
        {
            InitializeComponent();

            g = CreateGraphics();
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
        }

        public void Koch(PointF Apont, PointF Bpont)
        {
            distance = Math.Sqrt(Math.Pow(Bpont.X - Apont.X, 2) + Math.Pow(Bpont.Y - Apont.Y, 2));
            if (distanceKis < 10)
            {
                distanceKis = Math.Sqrt(3) / 2 * distance;
                // Első harmadoló
                Kpont = new PointF((2 * Apont.X + Bpont.X) / 3, (2 * Apont.Y + Bpont.Y) / 3);
                // Második harmadoló
                Lpont = new PointF((Apont.X + 2 * Bpont.X) / 3, (Apont.Y + 2 * Bpont.Y) / 3);
                // Bűűűvös pont
                Mpont = new PointF(Apont.X + (3 / 2) * (Kpont.X - Apont.X) + (float)distanceKis * (Apont.Y - Kpont.Y), Apont.Y + (3 / 2) * (Kpont.Y - Apont.Y) + (float)distanceKis * (Kpont.X - Apont.X));

                Koch(Apont, Kpont);
                Koch(Kpont, Mpont);
                Koch(Mpont, Lpont);
                Koch(Lpont, Bpont);
            }
            else
            {
                g.DrawLine(new Pen(Color.Blue), Apont, Bpont);
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Koch(new PointF(100, 20), new PointF(500, 20));
        }


    }
}