Here is the complete code for the Ping Pong game.
The ball starts at the top left of the form instead of moving.
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 Pong_Game
{
public partial class Form1 : Form
{
int paddle_x = 0;
int paddle_y = 255;
int paddle_width = 35;
int paddle_height = 20;
Graphics g;
int x = 0;
int y = 0;
int dx = 8;
int dy = 5;
public Form1()
{
InitializeComponent();
this.MouseMove += new MouseEventHandler(MovePaddle);
this.Paint += new PaintEventHandler(paint1);
}
private void paint1(Object sender, PaintEventArgs e)
{
g = e.Graphics;
SolidBrush blueBrush = new SolidBrush(Color.Red);
Hmmm.
g.FillRectangle(blueBrush, paddle_x, paddle_y, paddle_width,
paddle_height);
SolidBrush brush = new SolidBrush(Color.Blue);
g.FillEllipse(brush, x, y, 10, 10);
}
private void MovePaddle(Object sender, MouseEventArgs e)
{
paddle_y = e.Y;
paddle_x = e.X;
Invalidate();
}
private void timer1_Tick(object sender, EventArgs e)
{
MoveBall();
}
private void MoveBall()
{
int newBall_x = x + dx;
int newBall_y = y + dy;
if ((newBall_x < 0 || (newBall_x > 300))) dx = - dx;
if ((newBall_y < 0 || (newBall_y > 255))) dy = - dy;
if (((newBall_x > paddle_x) && (newBall_x < (paddle_x +
paddle_width)))&&((newBall_y > paddle_y) && (newBall_y < (paddle_y +
paddle_height))))
{
if (dx > 0 && dy > 0)
{
dx = -dy;
}
if (dx < 0 && dy > 0)
{
dy = -dy;
}
}
x = x + dx;
y = y + dy;
Invalidate();
}
}
}
The example is not complete as you are missing the designer
generated stuff.
Below is a similar example without any hidden designer stuff.
Arne
==============
using System;
using System.Drawing;
using System.Windows.Forms;
public class MainForm : Form
{
private const int D = 20;
private const int W = 400;
private const int H = 400;
private static readonly Random rng = new Random();
private int x;
private int y;
private int dx;
private int dy;
private PictureBox pic;
private Timer t;
public MainForm()
{
x = rng.Next(0, W-D);
y = rng.Next(0, H-D);
dx = rng.Next(1, 5);
dy = rng.Next(1, 5);
pic = new PictureBox();
pic.Location = new Point(0, 0);
pic.Size = new Size(W, H);
pic.Paint += BallPaint;
Controls.Add(pic);
Resize += Mirror;
ClientSize = new Size(W, H);
t = new Timer();
t.Interval = 10;
t.Tick += BallMove;
t.Start();
}
private void Mirror(object sender, EventArgs evt)
{
pic.Size = this.ClientSize;
}
private void BallMove(object sender, EventArgs evt)
{
x += dx;
y += dy;
if(x < 0)
{
x = 0;
dx = -dx;
dy += rng.Next(-1, 1);
}
if(x > pic.Width - D)
{
x = pic.Width - D;
dx = -dx;
dy += rng.Next(-1, 1);
}
if(y < 0)
{
y = 0;
dx += rng.Next(-1, 1);
dy = - dy;
}
if(y > pic.Height - D)
{
y = pic.Height - D;
dx += rng.Next(-1, 1);
dy = - dy;
}
pic.Invalidate();
}
private void BallPaint(object sender, PaintEventArgs evt)
{
evt.Graphics.FillEllipse(new SolidBrush(Color.Blue), x, y, D, D);
}
[STAThread]
public static void Main(string[] args)
{
Application.Run(new MainForm());
}
}
