Frakral Manderbrota C#

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 WindowsFormsApplication7
{
    public partial class Form1 : Form
    {
        private int ile_iteracji, scaling;
        double xr0,yr0, rszer, rwys;
        public Form1()
        {
            InitializeComponent();
            ile_iteracji = 10;
            scaling = 2;
            xr0 = -0.5;
            yr0 = 0.0;
            rszer = 3.0;
            rwys = 3.0;

        }

        private void button2_Click(object sender, EventArgs e)
        {
            Close();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            Rysuj();
        }
        private double Manderbrot(double a, double b)
        {
            const double inf = 3.0;
            double x = 0, y = 0, xx;
            int i;
            for(i = 0; i < ile_iteracji; i++)
            {
                xx = x * x - y * y + a;
                if (xx < -inf || xx > inf)
                    break;
                y = 2 * x * y + b;
                if (y < -inf || y > inf)
                    break;
                x = xx;
            }
            if (i == ile_iteracji)
                return 0;
            else
                return (double)i / (double)ile_iteracji;
        }
        private void Rysuj()
        {
            int eszer = pictureBox1.Width;
            int ewys = pictureBox1.Height;
            int xe0 = 0, ye0 = 0;
            double a, b, v;
            int r, g, bb;

            pictureBox1.Image = new Bitmap(eszer, ewys);
            Bitmap bmp = (Bitmap)pictureBox1.Image;

            Skala s = new Skala(xe0, ye0, eszer, ewys, xr0, yr0, rszer, rwys);

            for (int xe = xe0; xe < eszer; xe++)
            {
                a = s.daj_real_x(xe);
                for (int ye = ye0; ye < ewys; ye++)
                {
                    b = s.daj_real_y(ye);
                    v = Manderbrot(a, b);
                    r = Convert.ToInt32(v * 100);
                    g = Convert.ToInt32(v * 200);
                    bb = Convert.ToInt32(v * 250);
                    bmp.SetPixel(xe, ye, Color.FromArgb(r,g,bb));
                }
            }
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            scaling = Convert.ToInt32(textBox2.Text);
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            ile_iteracji = Convert.ToInt32(textBox1.Text);
        }



    }
}