/** SnakePartClass for SnakeApplet  Copyright(c) 2001 Waku Waku */
public class SnakePart
{
	public static final int SPEED=7;
	public static final double RAD=0.3;
	double x,y;
	double m;
	SnakePart before;
	public SnakePart(int x,int y,double m,SnakePart before)
	{
		this.x=x;
		this.y=y;
		this.m=m;
		this.before=before;
	}
	public void nextSate()
	{
		double mk;
		double sx=x-before.x,sy=y-before.y;
			mk=Math.atan(sy/sx);
		if(sx>0 && sy>0)
			mk+=Math.PI;
		if(sy<0 && sx>0)
			mk+=Math.PI;

		double b=m-mk,c=mk-m;
		
		if(c>0 && c<Math.PI*2)
			b=Math.PI*2-c;
		
		
		if(b>0 && b<Math.PI)
			m-=RAD;
		else
			m+=RAD;
		m=m%(Math.PI*2);

		x+=Math.cos(m)*SPEED;
		y+=Math.sin(m)*SPEED;
	}
}