/** Snake Applet  Copyright(c) 2001 Waku Waku */
import java.applet.*;
import java.awt.*;
import java.util.Random;

public class Snake extends Applet implements Runnable
{
	public static final int MAX=80;
	public static final Color[] col;
	static
	{
		col=new Color[MAX];
		for(int i=0;i<MAX;i++)
		{
			int c=255-210*i/MAX;
			col[i]=new Color(0,c,0);
		}
	}
	int w,h;
	SnakePart[] sp=new SnakePart[MAX];
	SnakePart ms;
	Thread th=null;
	Image off,img,back;
	Graphics g;
	public void init()
	{
		setBackground(Color.black);
		Dimension d=getSize();
		w=d.width;
		h=d.height;
		img=getImage(getCodeBase(),"snake.gif");
		off=createImage(w,h);
		back=createImage(w,h);
		Graphics g=back.getGraphics();
		g.clearRect(0,0,w,h);
		g.setColor(new Color(25,25,35));
		g.setFont(new Font("System",Font.BOLD,300));
		g.drawString("–¤",100,h-70);
		g.dispose();
		setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
	}
	public void start()
	{
		ms=new SnakePart(w/2,h/2,0,null);
		Random ran=new Random();
		sp[0]=new SnakePart(w/2,h/2,ran.nextDouble()%(Math.PI*2),ms);
		for(int i=1;i<sp.length;i++)
			sp[i]=new SnakePart(w/2,h/2,ran.nextDouble()%(Math.PI*2),sp[i-1]);
		if(th==null)
		{
			th=new Thread(this);
			th.setPriority(th.NORM_PRIORITY);
		}
		th.start();
	}
	public void stop()
	{
		if(th!=null)
		{
			th.stop();
			th=null;
		}
	}
	public void run()
	{
		try
		{
			g=off.getGraphics();
			while(true)
			{
				g.drawImage(back,0,0,this);
				for(int i=0;i<sp.length;i++)
				{
					sp[i].nextSate();
					g.setColor(col[i]);
					if(i!=0)
						g.drawLine((int)sp[i].x,(int)sp[i].y,(int)sp[i-1].x,(int)sp[i-1].y);
					else
						g.drawImage(img,(int)sp[0].x-8,(int)sp[0].y-8,this);
				}
				g.setColor(Color.lightGray);
				g.drawRect(0,0,w-1,h-1);
				repaint();
				th.sleep(30);
			}
		}catch(InterruptedException e){}
	}
	public void update(Graphics g)
	{
		paint(g);
	}
	public void paint(Graphics g)
	{
		g.drawImage(off,0,0,this);
	}
	public boolean mouseDrag(Event e,int x,int y)
	{
		return mouseMove(e,x,y);
	}
	public boolean mouseMove(Event e,int x,int y)
	{
		ms.x=x;
		ms.y=y;
		return true;
	}
	public boolean mouseDown(Event e,int x,int y)
	{
		Random ran=new Random();
		for(int i=0;i<sp.length;i++)
			sp[i].m=ran.nextDouble()%(Math.PI*2);
		
		return true;
	}
}