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

public class sin4 extends Applet implements Runnable, ActionListener
{
        
        private int a = 0;
        private Image image1 = null;
        private Graphics graph1 = null;
        private Thread move = null;
        
        int i1 = 50;
        int i3 = 10;
        
        
        TextField tf1=new TextField("Raadius"); // raadius       
        TextField tf3=new TextField("Kiirus"); // kiirus
        
        public void init()
        {
                
                add(tf1);
                add(tf3);
                tf1.addActionListener(this);              
                tf3.addActionListener(this);
                start();
                
        }


        public void update(Graphics g)
        {
                paint(g);
        }
        
        public void paint(Graphics g)
        {
                int xo = 0;
                int yo;
                int xn = 0;
                int yn;
                
                if (image1 == null)
                {                        
                        image1 = createImage(getSize().width, getSize().height);
                        graph1 = image1.getGraphics();
                }
                
                                
                yo = (int)(50 * Math.sin((double)(xn+a)*Math.PI/i3) + getSize().height / 2);
                
                graph1.setColor(Color.white);
                graph1.fillRect(0,0,getSize().width, getSize().height);
                             
                graph1.setColor(Color.green);
                
                while(xn < getSize().width)
                {
                        
                        yn = (int)(50 * Math.sin((double)(xn+a)*Math.PI/i3) + getSize().height / 2);
                        graph1.drawLine(xo, yo, xn, yn);
                        yo=yn;
                        xo=xn;
                        xn++;
                       

                }
                
                g.drawImage(image1, 0,0,this);                
               
        }

        public void run()
        {
                while (Thread.currentThread() == move)
                {
                        a = a + i3;
                        if (a >= 360) 
                        	 a = 0;
	                         
                        
                        repaint();
                        try
                        {
                                Thread.sleep(20);
                        }
                        catch (InterruptedException e) {}
                }
        }


        public void actionPerformed(ActionEvent e){
    			i1=Integer.parseInt(tf1.getText().trim());
     			i3=Integer.parseInt(tf3.getText().trim()); 
            start();

               move = new Thread(this);
               move.start();
        }

        
	
	public void stop()
        {
                move = null;
        }
  
}