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|
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 WinMySprites
{
public partial class Form1 : Form
{
private Sprite[] Sprites = new Sprite[10];
public Form1()
{
InitializeComponent();
this.DoubleBuffered = true;
}
private void Form1_Load(object sender, EventArgs e)
{
// Prepare the sprites.
Graphics canvas ;
Random rndPos = new Random();
// Create sprites.
for (int i = 0 ;i < Sprites.Length;i++)
{
Sprites[i] = new Sprite();
Sprites[i].X = rndPos.Next(this.Left, this.Right);
Sprites[i].Y = rndPos.Next(this.Top, this.Bottom);
if (i % 2 == 0)
{
Sprites[i].VelocityX = 2;
Sprites[i].VelocityY = 1;
}
else
{
Sprites[i].VelocityX = 1;
Sprites[i].VelocityY = -2;
}
Sprites[i].SpriteImage = new Bitmap(30, 30);
canvas = Graphics.FromImage(Sprites[i].SpriteImage);
canvas.Clear(Color.FromArgb(0, 0, 0, 0));
canvas.FillEllipse(Brushes.Red, 0, 0, 30, 30);
canvas.Dispose();
}
// Start the action.
this.timer1.Interval = 10;
this.timer1.Enabled = true;
}
private void timer1_Tick(object sender, EventArgs e)
{
// Trigger a redraw of the form.
this.Refresh();
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
// Draw the sprites on a background.
// Redraw the striped background.
for( int i = 0 ; i< this.ClientSize.Width * 2 ;i+=20)
{
e.Graphics.DrawLine(new Pen(Color.LightBlue, 5),
i, -5, i- this.ClientSize.Height - 10,
this.ClientSize.Height + 5);
}
// Draw each sprites.
for (int i = 0; i < Sprites.Length; i++)
{
Sprites[i].Draw(e.Graphics);
for (int j = 0; j < Sprites.Length; j++)
{
// See if the sprites have hit each other.
if (Sprites[i].Collision( Sprites[j]))
{
Sprites[i].VelocityX = -Sprites[i].VelocityX;
Sprites[i].VelocityY = -Sprites[i].VelocityY;
Sprites[j].VelocityX = -Sprites[j].VelocityX;
Sprites[j].VelocityY = -Sprites[j].VelocityY;
}
}
}
// Move the sprites for the next update.
for (int i=0; i<Sprites.Length ;i++)
{
if (Sprites[i].X < 0)
{
Sprites[i].VelocityX = Math.Abs(Sprites[i].VelocityX);
}
if (Sprites[i].Y < 0)
{
Sprites[i].VelocityY = Math.Abs(Sprites[i].VelocityY);
}
if (Sprites[i].X >this.ClientSize.Width - 30)
{
Sprites[i].VelocityX = -Math.Abs(Sprites[i].VelocityX);
}
if (Sprites[i].Y > this.ClientSize.Height - 30)
{
Sprites[i].VelocityY = -Math.Abs(Sprites[i].VelocityY);
}
}
}
}
} |
