import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;

/*
*/

public class Siinus extends PuhverApplet implements Runnable{
  Thread t;
  Dimension sz;
  int sinAlg = 0;
  double[] m = new double[100];
  double a = 1; //amplituud

  public Siinus(){
    init();
  }

  public void init(){
    for(int i=0; i<m.length; i++){
      m[i] = a * Math.sin(i*((2*Math.PI)/m.length));
    }
    requestFocus();
    t = new Thread(this);
    t.start();
  }

  public boolean isFocusTraversable(){
    return true;
  }

  public void nextStep(){ //siin arvutakse uus olukord.
    sinAlg = (sinAlg+1)%m.length;
    System.out.println("."+sinAlg);
  }

  public void koostaPilt(Graphics g){
    sz.getSize();
    g.setColor(Color.white);
    g.fillRect(0, 0, sz.width, sz.height);
    g.setColor(Color.black);
    
    int c = 3;
    double nulljoon = sz.height/2;
    double ap = nulljoon - 10;
    for(int i=0, x=0; x < sz.width; i++){
      g.drawLine(i*c, (int)(m[(i+sinAlg)%m.length]*(-ap) + nulljoon), 
         (x=(i+1)*c), (int)(m[(i+1+sinAlg)%m.length]*(-ap) + nulljoon));
    }
  }

  public void run(){
    t.setPriority(Thread.NORM_PRIORITY-2);
    while(true){
      sz = getSize();
      nextStep();
      repaint();
      Thread.yield();
      try{Thread.sleep(50);}catch(Exception e){}
    }
  }
  
 public static void main(String argumendid[]){
   Frame f = new Frame("Siinus");
   f.add(new Siinus());
   f.setSize(220, 220);
   f.setVisible(true);
    f.addWindowListener(new WindowAdapter(){
     public void windowClosing(WindowEvent e){
       System.out.println("Programmi ots");
       System.exit(0);
     }
    });
 }
}