{

/// <summary>

/// Summary description for Form1.

/// </summary>

public class BilliardForm : System.Windows.Forms.Form

{

private FormRandomDistribution formDistribution ;

private int numBalls;

private float radius;

private float maxSpeed;

private float minSpeed;

private float mueG;

private bool isRandomColor;

private bool isBlueColor ;

private bool isCaughtBall = false;

private int intballCaught;

private float dx, dy;

public static float height;

public static float width;

private Table myTable;

private Ball[] balls;

private Ball[] tempBalls;

private Timer timer;

private int interval;

private float dt;

private System.Windows.Forms.PictureBox pictureBox1;

private System.Windows.Forms.Button buttonStart;

private System.Windows.Forms.MainMenu mainMenu1;

private System.Windows.Forms.MenuItem menuItemFile;

private System.Windows.Forms.Button buttonPause;

private System.Windows.Forms.Label label1;

private System.Windows.Forms.Label label2;

private System.Windows.Forms.HScrollBar hScrollBartimer;

private System.Windows.Forms.GroupBox groupBox1;

private System.Windows.Forms.HScrollBar hScrollBardt;

private System.Windows.Forms.Label label3;

private System.Windows.Forms.Label label4;

private System.Windows.Forms.Label label5;

private System.Windows.Forms.Label label6;

private System.Windows.Forms.MenuItem menueItemManual;

private System.Windows.Forms.MenuItem menuItemDistribution;

private System.Windows.Forms.MenuItem menuItemRandom;

private System.Windows.Forms.CheckBox checkBox1;

private System.Windows.Forms.Label label7;

private System.Windows.Forms.ToolTip toolTip1;

private System.Windows.Forms.CheckBox checkBox2;

private System.Windows.Forms.MenuItem menuItemExit;

private System.Windows.Forms.GroupBox groupBox2;

private System.Windows.Forms.MenuItem menuItemRegular;

private System.ComponentModel.IContainer components;

public BilliardForm()

{

//

// Required for Windows Form Designer support

//

InitializeComponent();

//

// TODO: Add any constructor code after InitializeComponent call

//

ValueOfFasting();

ValueOfPrecision();

timer = new Timer();

timer.Interval = interval;

width = pictureBox1.Width;

height= pictureBox1.Height;

myTable = new Table(width, height);

Default();

CreateRegularBalls();

pictureBox1.Paint+=new PaintEventHandler(pictureBox1_Paint);

TurnOnAllMouseHandle();

string aboutballs = "Press left button and hold it to moving the ball."+

"\r\n"+ "Press right button to changing the ball's properties." ;

toolTip1.SetToolTip(pictureBox1, aboutballs);

}

/// <summary>

/// Clean up any resources being used.

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

}

base.Dispose( disposing );

}

#region Windows Form Designer generated code

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.components = new System.ComponentModel.Container();

System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(BilliardForm));

this.pictureBox1 = new System.Windows.Forms.PictureBox();

this.buttonStart = new System.Windows.Forms.Button();

this.mainMenu1 = new System.Windows.Forms.MainMenu(this.components);

this.menuItemFile = new System.Windows.Forms.MenuItem();

this.menuItemExit = new System.Windows.Forms.MenuItem();

this.menuItemDistribution = new System.Windows.Forms.MenuItem();

this.menuItemRandom = new System.Windows.Forms.MenuItem();

this.menueItemManual = new System.Windows.Forms.MenuItem();

this.menuItemRegular = new System.Windows.Forms.MenuItem();

this.buttonPause = new System.Windows.Forms.Button();

this.hScrollBartimer = new System.Windows.Forms.HScrollBar();

this.label1 = new System.Windows.Forms.Label();

this.label2 = new System.Windows.Forms.Label();

this.groupBox1 = new System.Windows.Forms.GroupBox();

this.label6 = new System.Windows.Forms.Label();

this.label5 = new System.Windows.Forms.Label();

this.hScrollBardt = new System.Windows.Forms.HScrollBar();

this.label3 = new System.Windows.Forms.Label();

this.label4 = new System.Windows.Forms.Label();

this.checkBox1 = new System.Windows.Forms.CheckBox();

this.label7 = new System.Windows.Forms.Label();

this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);

this.checkBox2 = new System.Windows.Forms.CheckBox();

this.groupBox2 = new System.Windows.Forms.GroupBox();

((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();

this.groupBox1.SuspendLayout();

this.groupBox2.SuspendLayout();

this.SuspendLayout();

//

// pictureBox1

//

this.pictureBox1.BackColor = System.Drawing.Color.Black;

this.pictureBox1.Location = new System.Drawing.Point(16, 80);

this.pictureBox1.Name = "pictureBox1";

this.pictureBox1.Size = new System.Drawing.Size(800, 500);

this.pictureBox1.TabIndex = 0;

this.pictureBox1.TabStop = false;

//

// buttonStart

//

this.buttonStart.BackColor = System.Drawing.SystemColors.Control;

this.buttonStart.Cursor = System.Windows.Forms.Cursors.Default;

this.buttonStart.Font = new System.Drawing.Font("Microsoft Sans Serif", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.buttonStart.ForeColor = System.Drawing.Color.Black;

this.buttonStart.Location = new System.Drawing.Point(136, 40);

this.buttonStart.Name = "buttonStart";

this.buttonStart.Size = new System.Drawing.Size(80, 24);

this.buttonStart.TabIndex = 1;

this.buttonStart.Text = "Start";

this.buttonStart.UseVisualStyleBackColor = false;

this.buttonStart.Click += new System.EventHandler(this.buttonStart_Click);

//

// mainMenu1

//

this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

this.menuItemFile,

this.menuItemDistribution});

//

// menuItemFile

//

this.menuItemFile.Index = 0;

this.menuItemFile.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

this.menuItemExit});

this.menuItemFile.Text = "&File";

//

// menuItemExit

//

this.menuItemExit.Index = 0;

this.menuItemExit.Text = "Exit";

this.menuItemExit.Click += new System.EventHandler(this.menuItemExit_Click);

//

// menuItemDistribution

//

this.menuItemDistribution.Index = 1;

this.menuItemDistribution.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

this.menuItemRandom,

this.menueItemManual,

this.menuItemRegular});

this.menuItemDistribution.Text = "&Distribution";

//

// menuItemRandom

//

this.menuItemRandom.Index = 0;

this.menuItemRandom.Text = "Random";

this.menuItemRandom.Click += new System.EventHandler(this.menuItemRandom_Click_1);

//

// menueItemManual

//

this.menueItemManual.Index = 1;

this.menueItemManual.Text = "Manual";

this.menueItemManual.Click += new System.EventHandler(this.menueItemManual_Click);

//

// menuItemRegular

//

this.menuItemRegular.Index = 2;

this.menuItemRegular.Text = "Regular";

this.menuItemRegular.Click += new System.EventHandler(this.menuItemRegular_Click);

//

// buttonPause

//

this.buttonPause.BackColor = System.Drawing.SystemColors.Control;

this.buttonPause.Cursor = System.Windows.Forms.Cursors.Default;

this.buttonPause.Enabled = false;

this.buttonPause.Font = new System.Drawing.Font("Microsoft Sans Serif", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.buttonPause.ForeColor = System.Drawing.Color.Black;

this.buttonPause.Location = new System.Drawing.Point(232, 40);

this.buttonPause.Name = "buttonPause";

this.buttonPause.Size = new System.Drawing.Size(80, 24);

this.buttonPause.TabIndex = 2;

this.buttonPause.Text = "Pause";

this.buttonPause.UseVisualStyleBackColor = false;

this.buttonPause.Click += new System.EventHandler(this.buttonPause_Click);

//

// hScrollBartimer

//

this.hScrollBartimer.Cursor = System.Windows.Forms.Cursors.Arrow;

this.hScrollBartimer.LargeChange = 1;

this.hScrollBartimer.Location = new System.Drawing.Point(32, 24);

this.hScrollBartimer.Maximum = 20;

this.hScrollBartimer.Name = "hScrollBartimer";

this.hScrollBartimer.Size = new System.Drawing.Size(136, 16);

this.hScrollBartimer.TabIndex = 6;

this.hScrollBartimer.Value = 17;

this.hScrollBartimer.ValueChanged += new System.EventHandler(this.hScrollBartimer_ValueChanged);

//

// label1

//

this.label1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(255)))));

this.label1.Font = new System.Drawing.Font("Times New Roman", 6.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(177)));

this.label1.ForeColor = System.Drawing.Color.Black;

this.label1.Location = new System.Drawing.Point(3, 24);

this.label1.Name = "label1";

this.label1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;

this.label1.Size = new System.Drawing.Size(29, 16);

this.label1.TabIndex = 5;

this.label1.Text = "Slow";

//

// label2

//

this.label2.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(255)))));

this.label2.Font = new System.Drawing.Font("Times New Roman", 6.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(177)));

this.label2.ForeColor = System.Drawing.Color.Black;

this.label2.Location = new System.Drawing.Point(168, 24);

this.label2.Name = "label2";

this.label2.Size = new System.Drawing.Size(24, 16);

this.label2.TabIndex = 6;

this.label2.Text = "Fast";

//

// groupBox1

//

this.groupBox1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(255)))));

this.groupBox1.Controls.Add(this.label6);

this.groupBox1.Controls.Add(this.label5);

this.groupBox1.Controls.Add(this.hScrollBardt);

this.groupBox1.Controls.Add(this.label3);

this.groupBox1.Controls.Add(this.label4);

this.groupBox1.Controls.Add(this.hScrollBartimer);

this.groupBox1.Controls.Add(this.label1);

this.groupBox1.Controls.Add(this.label2);

this.groupBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.groupBox1.ForeColor = System.Drawing.Color.Black;

this.groupBox1.Location = new System.Drawing.Point(544, 0);

this.groupBox1.Name = "groupBox1";

this.groupBox1.RightToLeft = System.Windows.Forms.RightToLeft.No;

this.groupBox1.Size = new System.Drawing.Size(272, 72);

this.groupBox1.TabIndex = 5;

this.groupBox1.TabStop = false;

this.groupBox1.Text = "Animation of Balls";

//

// label6

//

this.label6.Font = new System.Drawing.Font("Times New Roman", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.label6.Location = new System.Drawing.Point(192, 48);

this.label6.Name = "label6";

this.label6.Size = new System.Drawing.Size(56, 16);

this.label6.TabIndex = 11;

this.label6.Text = "Precision";

this.label6.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;

//

// label5

//

this.label5.Font = new System.Drawing.Font("Times New Roman", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.label5.Location = new System.Drawing.Point(192, 24);

this.label5.Name = "label5";

this.label5.Size = new System.Drawing.Size(40, 16);

this.label5.TabIndex = 10;

this.label5.Text = "Timer";

this.label5.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;

//

// hScrollBardt

//

this.hScrollBardt.Cursor = System.Windows.Forms.Cursors.Arrow;

this.hScrollBardt.LargeChange = 1;

this.hScrollBardt.Location = new System.Drawing.Point(32, 48);

this.hScrollBardt.Maximum = 39;

this.hScrollBardt.Name = "hScrollBardt";

this.hScrollBardt.Size = new System.Drawing.Size(136, 16);

this.hScrollBardt.TabIndex = 7;

this.hScrollBardt.Value = 21;

this.hScrollBardt.ValueChanged += new System.EventHandler(this.hScrollBardt_ValueChanged);

//

// label3

//

this.label3.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(255)))));

this.label3.Font = new System.Drawing.Font("Times New Roman", 6.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(177)));

this.label3.ForeColor = System.Drawing.Color.Black;

this.label3.Location = new System.Drawing.Point(8, 48);

this.label3.Name = "label3";

this.label3.RightToLeft = System.Windows.Forms.RightToLeft.Yes;

this.label3.Size = new System.Drawing.Size(24, 16);

this.label3.TabIndex = 8;

this.label3.Text = "Less";

//

// label4

//

this.label4.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(255)))));

this.label4.Font = new System.Drawing.Font("Times New Roman", 6.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(177)));

this.label4.ForeColor = System.Drawing.Color.Black;

this.label4.Location = new System.Drawing.Point(168, 48);

this.label4.Name = "label4";

this.label4.Size = new System.Drawing.Size(36, 16);

this.label4.TabIndex = 9;

this.label4.Text = "More";

//

// checkBox1

//

this.checkBox1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(255)))));

this.checkBox1.ForeColor = System.Drawing.Color.Black;

this.checkBox1.Location = new System.Drawing.Point(8, 48);

this.checkBox1.Name = "checkBox1";

this.checkBox1.Size = new System.Drawing.Size(202, 24);

this.checkBox1.TabIndex = 4;

this.checkBox1.Text = "Show the number of each balls";

this.checkBox1.UseVisualStyleBackColor = false;

this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);

//

// label7

//

this.label7.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.label7.ForeColor = System.Drawing.Color.Blue;

this.label7.Location = new System.Drawing.Point(16, 64);

this.label7.Name = "label7";

this.label7.Size = new System.Drawing.Size(48, 16);

this.label7.TabIndex = 9;

this.label7.Text = "x ------>";

this.label7.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;

//

// toolTip1

//

this.toolTip1.AutomaticDelay = 10;

this.toolTip1.AutoPopDelay = 5000;

this.toolTip1.InitialDelay = 10;

this.toolTip1.ReshowDelay = 2;

//

// checkBox2

//

this.checkBox2.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(255)))));

this.checkBox2.ForeColor = System.Drawing.Color.Black;

this.checkBox2.Location = new System.Drawing.Point(8, 24);

this.checkBox2.Name = "checkBox2";

this.checkBox2.Size = new System.Drawing.Size(184, 24);

this.checkBox2.TabIndex = 3;

this.checkBox2.Text = "Showing 3D";

this.checkBox2.UseVisualStyleBackColor = false;

this.checkBox2.CheckedChanged += new System.EventHandler(this.checkBox2_CheckedChanged);

//

// groupBox2

//

this.groupBox2.Controls.Add(this.checkBox1);

this.groupBox2.Controls.Add(this.checkBox2);

this.groupBox2.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.groupBox2.ForeColor = System.Drawing.Color.Black;

this.groupBox2.Location = new System.Drawing.Point(320, 0);

this.groupBox2.Name = "groupBox2";

this.groupBox2.Size = new System.Drawing.Size(216, 74);

this.groupBox2.TabIndex = 10;

this.groupBox2.TabStop = false;

this.groupBox2.Text = "Graphics";

//

// BilliardForm

//

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(192)))), ((int)(((byte)(255)))));

this.ClientSize = new System.Drawing.Size(830, 595);

this.Controls.Add(this.groupBox2);

this.Controls.Add(this.label7);

this.Controls.Add(this.groupBox1);

this.Controls.Add(this.buttonPause);

this.Controls.Add(this.buttonStart);

this.Controls.Add(this.pictureBox1);

this.ForeColor = System.Drawing.Color.Silver;

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;

this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));

this.MaximizeBox = false;

this.Menu = this.mainMenu1;

this.Name = "BilliardForm";

this.Text = "Billiard Elastic Balls ";

((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();

this.groupBox1.ResumeLayout(false);

this.groupBox2.ResumeLayout(false);

this.ResumeLayout(false);

}

#endregion

/// <summary>

/// The main entry point for the application.

/// </summary>

[STAThread]

static void Main()

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

Application.Run(new BilliardForm());

}

//------------------------------------------------------------

private void Default()

{

numBalls = 100;

radius = 10;

maxSpeed = 50;

minSpeed = 40;

mueG = 0.00F;

isBlueColor = true;

isRandomColor = false;

}

//-----------------------------------------------------------

private void GetDataFromDistributionForm()

{

numBalls = formDistribution.numBalls;

radius = formDistribution.radius;

maxSpeed = formDistribution.maxSpeed;

minSpeed = formDistribution.minSpeed;

mueG = formDistribution.mueG;

isBlueColor = formDistribution.isBlueColor;

isRandomColor = formDistribution.isRandomColor;

}

private void SetDataToDistributionForm()

{

formDistribution.numBalls = numBalls ;

formDistribution.radius = radius ;

formDistribution.maxSpeed = maxSpeed ;

formDistribution.minSpeed = minSpeed;

formDistribution.mueG = mueG ;

formDistribution.isBlueColor = isBlueColor;

formDistribution.isRandomColor = isRandomColor;

}

//----------------------------

private bool IsAllBallsStoped()

{

for(int i=0; i<balls.Length; i++)

{

if(balls[i] == null)

break;

if(balls[i].V != 0 )

return false;

}

return true;

}

//-------------------------

private void CreationBalls()

{

this.Cursor = Cursors.WaitCursor;

balls = new Ball[numBalls];

tempBalls = new Ball[numBalls];

Random rand = new Random();

for(int i=0; i<balls.Length; i++)

{

uint counter=0;

loop1:

float p = rand.Next((int)radius+1, (int)(width-radius)-1);

float q = rand.Next((int)radius+1, (int)(height-radius)-1);

float theta = rand.Next(1001)/167F;

float v = rand.Next( (int)minSpeed,(int)maxSpeed +1);

Color color ;

if(isRandomColor)

color = Color.FromArgb(rand.Next(256),rand.Next(256),rand.Next(256));

else

color = Color.Blue;

balls[i] = new Ball(p,q,radius,theta,v,mueG,color,myTable);

tempBalls[i] =new Ball(p,q,radius,theta,v,mueG,color,myTable);

for(int j=0;j<i;j++)

if(Ball.IsContactedTwoBall(balls[i],balls[j]))

{

counter++;

if(counter >= 1000000)

{

pictureBox1.Invalidate();

MessageBox.Show("Just "+Convert.ToString(i)+" balls can been in this Table !",

"Warning",MessageBoxButtons.OK,MessageBoxIcon.Information);

balls[i] = null;

tempBalls[i] = null;

goto loop2;

}

else

goto loop1;

}

}// End for

loop2:

this.Cursor = Cursors.Default;

}// end Creation Balls

//------------------------------------------------------

private void CreateRegularBalls()

{

const float c = 1.5F;

numBalls = 16;

balls = new Ball[numBalls];

tempBalls = new Ball[numBalls];

float r = 25;

Color color = Color.Blue;

PointF[][] apfs = new PointF[5][];

for(int i=0; i<apfs.GetLength(0); i++)

{

apfs[i] = new PointF[i+1];

if( (apfs[i].Length % 2) !=0)

{

for(int j=0; j<apfs[i].Length; j++)

{

apfs[i][j] = new PointF(

width/2 + (i)*2*(r-2),

height/2 - (apfs[i].Length-1)*(r+c) + 2*(r+c)*j);

}

}

else

{

for(int j=0; j<apfs[i].Length; j++)

{

apfs[i][j] = new PointF(

width/2 + (i)*2*(r-2),

height/2 - (apfs[i].Length-1)*(r+c) + 2*(r+c)*j);

}

}

}

int k =1;

float v =0;

for(int i = 0 ;i<apfs.GetLength(0) ; i++)

{

for(int j=0; j< apfs[i].Length; j++)

{

balls[k] = new Ball(apfs[i][j].X, apfs[i][j].Y, r, 0, v, 20, color, myTable);

tempBalls[k] = new Ball(apfs[i][j].X, apfs[i][j].Y, r, 0, v, 20, color, myTable);

k++;

}

}

color = Color.Purple;

v = 400;

balls[0] = new Ball(2+r, height/2, r, 0, v, 20, color, myTable);

tempBalls[0] = new Ball(2+r, height/2, r, 0, v, 20, color, myTable);

// loop2 :

// float p = rand.Next((int)r+1, (int)(width-r)-1);

// float q = rand.Next((int)r+1, (int)(height-r)-1);

// float v =0;

// if(i ==0)

// v = 400;

//

// balls[i] = new Ball(p, q, r, 0, v, 10, color, myTable);

// tempBalls[i] = new Ball(p, q, r, 0, v, 10, color, myTable);

//

// for(int j=0;j<i;j++)

// if(Ball.IsContactedTwoBall(balls[i],balls[j]))

// {

// goto loop2;

// }

} // End CreateShuffleBalls

//----------------------------------------------

private void ValueOfFasting()

{

for(int i=0;i<=hScrollBartimer.Maximum; i++)

if(hScrollBartimer.Value == i)

interval = 101 - 5*i;

}

private void ValueOfPrecision()

{

for(int i=0;i<=hScrollBardt.Maximum; i++)

if(hScrollBardt.Value ==i)

{

if(i <=12)

dt = (float)(0.7 - i/20.0);

else if(i<=21)

dt = (float)(0.1 - (i-12)/100.0);

else if(i<=30)

dt = (float)(0.01 - (i-21)/1000.0);

else if(i<=39)

dt = (float)(0.001 - (i-30)/10000.0);

}

}

//------------------------------------------------------

private void timer_Tick(object sender, EventArgs e)

{

Ball.UpadateMovingBalls(balls,dt);

if(IsAllBallsStoped())

{

timer.Tick -=new EventHandler(timer_Tick);

MessageBox.Show(" All balls are in Stationary.");

buttonStart.Text = "Reset";

buttonPause.Text = "Continue";

TurnOffAllMouseHandle();

TurnOnAllMouseHandle();

}

pictureBox1.Invalidate();

}

private void pictureBox1_Paint(object sender, PaintEventArgs pea)

{

Graphics g = pea.Graphics;

for(int i =0 ;i<balls.Length; i++)

{

if(balls[i]== null)

break;

if(checkBox2.Checked)

balls[i].Paint3D(g);

else

balls[i].Paint(g);

if(checkBox1.Checked)

{

string st = Convert.ToString(i+1);

Font font = new Font("Microsoft Sans Serif", balls[i].Radius/1.7F,FontStyle.Regular);

g.DrawString(st,font,new SolidBrush(Color.White),balls[i].X-balls[i].Radius/2,

balls[i].Y-balls[i].Radius/2);

}

}

}

private void buttonStart_Click(object sender, System.EventArgs e)

{

TurnOffAllMouseHandle();

toolTip1.RemoveAll();

if(((Button)sender).Text == "Start")

{

buttonPause.Text = "Pause";

buttonPause.Enabled= true;

buttonStart.Text = "Stop";

timer.Tick +=new EventHandler(timer_Tick);

timer.Start();

}

else if( ((Button)sender).Text == "Stop")

{

buttonPause.Text = "Pause";

buttonPause.Enabled = true;

buttonStart.Text = "Reset";

timer.Tick -=new EventHandler(timer_Tick);

}

else if(((Button)sender).Text == "Reset")

{

string aboutballs = "Press left button and hold it to moving the ball."+

"\r\n"+ "Press right button to changing the ball's properties." ;

toolTip1.SetToolTip(pictureBox1, aboutballs);

buttonPause.Text = "Pause";

buttonPause.Enabled = false;

buttonStart.Text = "Start";

for(int i =0; i<balls.Length; i++)

{

if(tempBalls[i] != null)

{

balls[i] = new Ball(tempBalls[i].X,tempBalls[i].Y,tempBalls[i].Radius,

tempBalls[i].Theta,tempBalls[i].V,tempBalls[i].MueG,

tempBalls[i].Color,tempBalls[i].GetSetTable);

}

}

TurnOnAllMouseHandle();

}

pictureBox1.Invalidate();

}

private void buttonPause_Click(object sender, System.EventArgs e)

{

TurnOffAllMouseHandle();

if(((Button)sender).Text == "Pause")

{

buttonPause.Text = "Continue";

timer.Tick -=new EventHandler(timer_Tick);

}

else if(((Button)sender).Text == "Continue")

{

buttonStart.Text = "Stop";

buttonPause.Text = "Pause";

timer.Tick +=new EventHandler(timer_Tick);

}

}

private void hScrollBartimer_ValueChanged(object sender, System.EventArgs e)

{

int i = ((HScrollBar)sender).Value;

interval = 101 - 5*i;

timer.Interval = interval;

}

//------------------------

private void hScrollBardt_ValueChanged(object sender, System.EventArgs e)

{

int i = ((HScrollBar)sender).Value;

if(i <=12)

dt = (float)(0.7 - i/20.0);

else if(i<=21)

dt = (float)(0.1 - (i-12)/100.0);

else if(i<=30)

dt = (float)(0.01 - (i-21)/1000.0);

else if(i<=39)

dt = (float)(0.001 - (i-30)/10000.0);

}

private void menueItemManual_Click(object sender, System.EventArgs e)

{

timer.Tick -=new EventHandler(timer_Tick);

FormManual formManual = new FormManual();

formManual.ShowDialog();

if(formManual.isPresedFinish)

{

TurnOffAllMouseHandle();

balls = new Ball[formManual.myballs.Length];

tempBalls = new Ball[balls.Length];

for(int i=0; i<balls.Length; i++)

{

balls[i] = formManual.myballs[i];

tempBalls[i] = new Ball(balls[i].X,balls[i].Y,balls[i].Radius,

balls[i].Theta,balls[i].V,balls[i].MueG,

balls[i].Color,balls[i].GetSetTable);

}

buttonStart.Text = "Start";

TurnOnAllMouseHandle();

}

else// isPresedFinish = false

{

buttonPause.Text = "Continue";

buttonStart.Text = "Reset";

}

pictureBox1.Invalidate();

}

private void menuItemRandom_Click_1(object sender, System.EventArgs e)

{

timer.Tick -=new EventHandler(timer_Tick);

formDistribution = new FormRandomDistribution(numBalls,radius,maxSpeed,minSpeed,mueG,isRandomColor,isBlueColor);

formDistribution.ShowDialog();

if(formDistribution.isOkPerresdFormRandomDistribution)

{

TurnOffAllMouseHandle();

GetDataFromDistributionForm();

CreationBalls();

buttonPause.Enabled = false;

buttonStart.Enabled = true;

buttonStart.Text = "Start";

TurnOnAllMouseHandle();

}

else

{

buttonPause.Enabled = true;

buttonPause.Text = "Continue";

buttonStart.Text = "Reset";

}

pictureBox1.Invalidate();

}

private void menuItemRegular_Click(object sender, System.EventArgs e)

{

timer.Tick -=new EventHandler(timer_Tick);

TurnOffAllMouseHandle();

isCaughtBall = false;

buttonPause.Enabled = false;

buttonStart.Enabled = true;

buttonStart.Text = "Start";

CreateRegularBalls();

TurnOnAllMouseHandle();

pictureBox1.Invalidate();

}

private void pictureBox1_MouseDown(object sender, MouseEventArgs e)

{

if(e.Button == MouseButtons.Left)

{

for(int i=0; i<balls.Length; i++)

if(balls[i] != null && balls[i].IsContainThisPoint(e.X, e.Y))

{

isCaughtBall = true;

intballCaught = i;

dx = e.X - balls[i].X;

dy = e.Y - balls[i].Y;

break;

}

}

else if(e.Button == MouseButtons.Right)

{

int i;

for(i=0; i<balls.Length; i++)

if(balls[i] != null && balls[i].IsContainThisPoint(e.X, e.Y))

{

float speed = balls[i].V;

float angle = balls[i].Theta;

float mueg = balls[i].MueG;

float radius= balls[i].Radius;

float xcenter = balls[i].X;

float ycenter = balls[i].Y;

Color color = balls[i].Color ;

FormForEachBall formforEachball = new FormForEachBall(i+1,radius,speed,angle

,mueg,color, xcenter,ycenter);

formforEachball.Location = pictureBox1.PointToScreen(new Point(e.X,e.Y));

formforEachball.ShowDialog();

balls[i].V = formforEachball.speed;

balls[i].Theta = formforEachball.angle;

balls[i].MueG = formforEachball.mueg;

balls[i].Color = formforEachball.color;

balls[i].Radius= formforEachball.radius;

for(int j=0; j<balls.Length; j++)

if( j!=i && balls[j]!=null &&

(Ball.IsContactedTwoBall(balls[i],balls[j]) ||

! balls[i].IsBallInsideTable(balls[i].GetSetTable)) )

{

balls[i].Radius = radius;

break;

}

break;

}// for i

}// end else

pictureBox1.Invalidate();

}

private void pictureBox1_MouseMove(object sender, MouseEventArgs e)

{

if(!isCaughtBall)

{

bool changing = false;

for(int i=0; i<balls.Length; i++)

{

if(balls[i] != null && balls[i].IsContainThisPoint(e.X, e.Y))

{

changing = true;

this.Cursor = Cursors.Hand;

break;

}

}

if(! changing)

this.Cursor = Cursors.Arrow;

}

if( e.Button == MouseButtons.Left && isCaughtBall)

{

this.Cursor = Cursors.Cross;