import java.awt.*;
import java.util.*;

public class ex4 extends BufferedApplet
{
   int w = 0, h;
   int count = 0;
   int X[] = new int[1000];
   int Y[] = new int[1000];
   int n = 0;
   Random R = new Random();

   public void render(Graphics g) {
      if (w == 0) {
	 w = bounds().width;
	 h = bounds().height;
      }

      g.setColor(Color.white);
      g.fillRect(0, 0, w, h);

      g.setColor(Color.black);
      int dx1 = 0, dy1 = 0;
      for (int i = 0 ; i < n-1 ; i++) {
	 int dx0 = dx1;
	 int dy0 = dy1;
         double theta = 2 * Math.PI * i * count / w;
	 dx1 = (int)(w/8 * Math.cos(theta));
	 dy1 = (int)(w/8 * Math.sin(theta));
	 if (i > 0)
	    g.drawLine(X[i] + dx0, Y[i] + dy0, X[i+1] + dx1, Y[i+1] + dy1);
      }

      //count++;

      animating = true;
   }

   public boolean mouseDown(Event e, int x, int y) {
      if (isRightButton(e))
	 count = x;
      else {
         count = 0;
         n = 0;
         addPoint(x, y);
      }
      return true;
   }

   public boolean mouseDrag(Event e, int x, int y) {
      if (isRightButton(e))
	 count = x;
      else
         addPoint(x, y);
      return true;
   }

   public boolean mouseUp(Event e, int x, int y) {
      if (isRightButton(e))
	 count = x;
      else
         addPoint(x, y);
      return true;
   }

   void addPoint(int x, int y) {
      X[n] = x;
      Y[n] = y;
      n++;
      damage = true;
   }

   boolean isRightButton(Event e) { return (e.modifiers & Event.META_MASK) != 0; }
}