how to classified?

[EDN Admin]

hey guys how can I change this code and make that nodes which are close together have same color like when 2 nodes are close together the color of them goes blue

<pre class="prettyprint using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Drawing;
namespace WindowsFormsApplication6
{
public partial class Form12 : Form
{
Random _rnd = new Random();
private MyPanel panel1 = new MyPanel();
public Form12()
{
InitializeComponent();
panel1.Location = new Point(269, 46);
panel1.Size = new Size(this.ClientSize.Width - 285, this.ClientSize.Height - 85);
this.Controls.Add(panel1);
panel1.MouseDown +=new MouseEventHandler(panel1_MouseDown);
}
public void panel1_MouseDown(object sender, MouseEventArgs e)
{
}


private void CreateRandomNode()
{
for (int i = 0; i < Convert.ToInt64(textBox1.Text); i++)
{
int Rh;
int Rs;
int l = 6;
int a = Convert.ToInt32(l * 3.5);
int b = Convert.ToInt32(l * 3.75);
int Rx = _rnd.Next(290, 920);
int Ry = _rnd.Next(70, 620);
Rh = Rx - a;
Rs = Ry - b;
PointF LocNde = new PointF(Rx, Ry);
PointF LocRng = new PointF(Rh, Rs);
SizeF SzeNde = new SizeF(l, l);
SizeF SzeRng = new SizeF(l * 8, l * 8);
Color cl = Color.White;
int j = _rnd.Next(0, 100);
bool h = false;
MyNode el = new MyNode() { LocNde = LocNde, Color = cl, LocRng = LocRng, Size = SzeNde, Sizes = SzeRng, ID = i, Power = j, isCH = h };
panel1._Node.Add(el);
if (checkBox1.Checked == true)
{
if (el.Power > 50)
{
el.Color = Color.FromArgb(255, 0, 0, 0);
el.isCH = true;
}
}
}
}
private void button1_Click(object sender, EventArgs e)
{
CreateRandomNode();
this.Refresh();
}
public class Ball : IDisposable
{
public PointF Location { get; set; }
public SizeF Size { get; set; }
private System.Drawing.Drawing2D.LinearGradientBrush brush;
private float r;
public float IncrementX { get; set; }
public float IncrementY { get; set; }
public float RotationAdd { get; set; }
public Ball()
{
this.IncrementX = this.IncrementY = 2;
this.RotationAdd = 2;
this.Size = new SizeF(100, 100);
this.brush = new System.Drawing.Drawing2D.LinearGradientBrush(new RectangleF(0, 0, Size.Width, Size.Height), Color.Red, Color.Yellow, 0F);
}
public Ball(SizeF size, Color c1, Color c2, float increment)
{
this.IncrementX = this.IncrementY = increment;
this.RotationAdd = 2;
this.Size = size;
this.brush = new System.Drawing.Drawing2D.LinearGradientBrush(new RectangleF(0, 0, Size.Width, Size.Height), c1, c2, 0F);
}
public void Dispose()
{
brush.Dispose();
}
internal void Render(Graphics g)
{
r += RotationAdd;
brush.TranslateTransform(-brush.Rectangle.Width / 2f, -brush.Rectangle.Height / 2f);
brush.RotateTransform(r, System.Drawing.Drawing2D.MatrixOrder.Append);
brush.TranslateTransform(brush.Rectangle.Width / 2f, brush.Rectangle.Height / 2f, System.Drawing.Drawing2D.MatrixOrder.Append);
g.TranslateTransform(Location.X, Location.Y);
g.FillEllipse(brush, new RectangleF(new Point(0, 0), Size));
brush.ResetTransform();
g.ResetTransform();
}
}
private void button2_Click_1(object sender, EventArgs e)
{
panel1.Visible = true;
}
public class MyPanel : Panel
{
public List<MyNode> _Node = new List<MyNode>();
private System.Windows.Forms.Timer t1 = new System.Windows.Forms.Timer();
public List<Ball> Balls { get { return _balls; } }
private List<Ball> _balls = new List<Ball>();

public MyPanel()
{
this.BackColor = Color.FromArgb(255, 0, 0, 0);
this.DoubleBuffered = true;
t1.Interval = 1;
t1.Tick += new EventHandler(t1_Tick);
AddOneBall(new Size(10, 10), Color.GreenYellow, Color.White);
this.Paint += new PaintEventHandler(Panel1_Paint);
}
private void AddOneBall(System.Drawing.Size size, Color color, Color color_2)
{
Ball b = new Ball(size, color, color_2, 9);
b.RotationAdd = 12;
this._balls.Add(b);
if (t1.Enabled == false)
t1.Start();
}
private void AddOneBall()
{
Ball b = new Ball();
this._balls.Add(b);
if (t1.Enabled == false)
t1.Start();
}
protected override void OnHandleDestroyed(EventArgs e)
{
if (t1 != null)
t1.Dispose();
if (_balls != null)
{
for (int i = _balls.Count - 1; i >= 0; i--)
{
_balls.Dispose();
}
_balls.Clear();
}
}
void t1_Tick(object sender, EventArgs e)
{
t1.Stop();
if (_balls != null)
{
for (int i = 0; i < _balls.Count; i++)
{
float x = _balls.Location.X + this._balls.IncrementX;
float y = _balls.Location.Y + this._balls.IncrementY;
if (x >= this.ClientSize.Width - _balls.Size.Width || x <= 0)
this._balls.IncrementX *= -1;
if (y >= this.ClientSize.Height - _balls.Size.Height || y <= 0)
this._balls.IncrementY *= -1;
_balls.Location = new PointF(x, y);
}
}
this.Invalidate();
if (t1.Enabled == false)
t1.Start();
}
protected override void OnPaint(PaintEventArgs e)
{
if (_balls != null)
{
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
for (int i = 0; i < _balls.Count; i++)
{
_balls.Render(e.Graphics);
}
}
if (_Node != null && _Node.Count > 0)
{
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
foreach (MyNode el in _Node)
el.Render(e.Graphics);
}
}
void Panel1_Paint(object sender, PaintEventArgs e)
{
if (_Node != null && _Node.Count > 0)
{
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
foreach (MyNode el in _Node)
el.Render(e.Graphics);
}
}
}
}
public class MyNode
{
public PointF LocNde { get; set; }
public PointF LocRng { get; set; }
public SizeF Size { get; set; }
public Color Color { get; set; }
public Color Colors { get; set; }
public float PenWidth { get; set; }
public float PenWidthRnge { get; set; }
public int ID { get; set; }
public int Power { get; set; }
public bool isCH { get; set; }
public SizeF Sizes { get; set; }
public MyNode()
{
LocNde = new PointF(0, 0);
LocRng = new PointF(0, 0);
Size = new SizeF(100, 100);
Sizes = new SizeF(300, 100);
Color = Color.Black;
Colors = Color.Black;
}
public void Render(Graphics g)
{
using (SolidBrush p = new SolidBrush(Color))
g.FillEllipse(p, new RectangleF(LocNde, Size));
using (SolidBrush s = new SolidBrush(Color.FromArgb(80, 0, 200, 0)))
g.FillEllipse(s, new RectangleF(LocRng, Sizes));
}
}
}[/code]
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