// Display an interactive dancing stick figure
import java.awt.*;
import java.net.*;
import java.util.*;

public class StickFigureApplet extends GenericApplet
{
   GraphicFigure f;

   public void render(Graphics g) {
      if (damage) {
	 if (f == null)
            f = new GraphicFigure(getCodeBase(), "StickFigure");
         g.setColor(Color.white);
         g.fillRect(0, 0, bounds().width, bounds().height);
         g.setColor(Color.black);
	 f.render(g);
      }
   }

   double t = 0.;
   public boolean mouseDrag(Event e, int x, int y) {
      damage = true;
      t += .2;
      for (int i = 0 ; i < f.size() ; i++)
	 if (f.name(i) != null) {
	    f.matrix(i).rotateX(1.2*Math.cos(   i + .678*t));
	    f.matrix(i).rotateY(1.2*Math.cos(.9*i + .890*t));
	    f.matrix(i).rotateZ(1.2*Math.cos(.8*i +      t));
	 }
      return true;
   }
}

class GraphicFigure extends KVMFile
{
   GraphicFigure(URL context, String URLName) { super(context, URLName); }

   Graphics g;
   public void render(Graphics g) {
      this.g = g;
      super.render();
   }
   public void drawLine(double x1, double y1, double x2, double y2) {
      g.drawLine((int)(3*x1), (int)(3*y1), (int)(3*x2), (int)(3*y2));
   }
   public void drawJoint(String name, double x, double y) { }
}