/*
   Copyright F. P. Marin ( Mon Dec 28 16:18:46 1998 )
   E-mail: felix@bloch.ciens.ucv.ve
   
   	Permission to use, copy, modify and distribute this software and
   its documentation for NON-COMERCIAL purposes and without fee is hereby
   granted provided that this copyright notice appears in all copies.
   	F. P. Marin makes no representations or warranties about the
   suitability of the software, either express or implied, including but
   no limited to the implied warranties of merchantability, fitness for a
   particular purpose, or non-infringement.
   	F. P. Marin shall not be liable for any damage suffered by license
   as a result of using, modifying or distributing this software or its
   derivatives.

   HTML code is:

   <applet archive="Eyes.jar"
              code="Eyes.class"
            height=400
             width=400>
   </applet> 
*/
import java.awt.*;
import java.awt.event.*;
import java.util.Random;


public class Eyes extends java.applet.Applet
{      
       Eye ey[]=new Eye[2];
       Graphics theg;
       Image theimg;
       int b,dHair=4,g,h,xiHair,xfHair,r,w;
       ThickArc eyebrow[]=new ThickArc[2],mouth;
       Orbit orbt[]=new Orbit[2];
       Random rndm=new Random();
       Rectangle horizNose=new Rectangle(),vertNose=new Rectangle();


       public void init()
       {
        h=size().height;
        w=size().width;
        xiHair=(int)(0.1*w + 0.5);
        xfHair=w - xiHair;
        orbt[0]=new Orbit((int)(w/4.0 + 0.5),(int)(h/2.0 + 0.5),this);
        ey[0]=new Eye(orbt[0]);
        int x=(int)(orbt[0].x - 0.75*orbt[0].maxRadius + 0.5);
        int y=(int)(orbt[0].y - 1.75*orbt[0].maxRadius + 0.5);
        int width=(int)(2.0*(orbt[0].x - x) + 0.5);
        eyebrow[0]=new ThickArc(x,y,width,60,180,180,5,
                                Color.green.brighter());

        orbt[1]=new Orbit(w - orbt[0].x,orbt[0].y,this);
        ey[1]=new Eye(orbt[1]);
        x+=orbt[1].x - orbt[0].x;
        eyebrow[1]=new ThickArc(x,y,width,60,180,180,5,
                                Color.cyan.brighter());

        x=(int)(0.1*w + 0.5);
        y=(int)(orbt[0].y  + 0.075*(h - orbt[0].y) + 0.5);
        mouth=new ThickArc(x,y,(int)(w - 2.0*x + 0.5),160,180,180,10,
                           Color.red.brighter());
        vertNose.width=20;
        vertNose.x=(int)((w - vertNose.width)/2.0 + 0.5);
        vertNose.y=orbt[0].y - orbt[0].minRadius;
        vertNose.height=(int)(2.1*orbt[0].maxRadius + 0.5);
        horizNose.width=(int)(0.4*w + 0.5);
        horizNose.x=(int)((w - horizNose.width)/2.0 + 0.5);
        horizNose.y=vertNose.y + vertNose.height;
        horizNose.height=20;
        theimg=createImage(w,h);
        theg=theimg.getGraphics();
        repaint();
       }


       public void update(Graphics g)
       {
        theg.setColor(Color.white.brighter());
        theg.fillRect(0,0,w,h);
        drawHair(theg);
        drawNose(theg);
        theg.setColor(Color.red.brighter());
        theg.drawRect(0,0,w - 1,h - 1);
        orbt[0].draw(theg);
        orbt[1].draw(theg);
        ey[0].draw(theg);
        ey[1].draw(theg);
        mouth.draw(theg);
        eyebrow[0].draw(theg); 
        eyebrow[1].draw(theg); 
        paint(g);
       }


       public void paint(Graphics g)
       {
        g.drawImage(theimg,0,0,this);
       }


        
       public final void drawHair(Graphics g)
       {
        for ( int i=xiHair ; i<xfHair ; i+=dHair ) {
            g.setColor(randColor());
            g.drawLine(i,2,i,70);
        }
       }


       public void drawNose(Graphics g)
       {
        g.setColor(randColor());
        g.fillRect(vertNose.x,vertNose.y,vertNose.width,vertNose.height);
        g.fillRect(horizNose.x,horizNose.y,horizNose.width,
                                           horizNose.height);
       }


       public boolean mouseMove(Event evnt,int x,int y)
       {
        ey[0].setPosition(x,y);
        ey[1].setPosition(x,y);
        repaint();
        return true;
       }


       public final Color randColor()
       {
        r=(int)(rndm.nextDouble()*256);
        g=(int)(rndm.nextDouble()*256);
        b=(int)(rndm.nextDouble()*256);
        return (new Color(r,g,b)).brighter().darker();
       }
}


class Eye
{
      static final int diameter=40;
      static final int radius=(int)(diameter/2.0 + 0.5);
      int dist,x,y;
      Orbit mother;


      public Eye(Orbit mother)
      {
       this.mother=mother;
       dist=mother.minRadius - radius - 2;
       double x0,y0;
       do {
           x0=mother.mother.rndm.nextDouble()*mother.mother.w;
           y0=mother.mother.rndm.nextDouble()*mother.mother.h;
       } while ( !setPosition(x0,y0) );
      }


      public final void draw(Graphics grphcs)
      {
       grphcs.setColor(mother.mother.randColor());
       grphcs.fillOval(x - radius,y - radius,diameter,diameter);
      }


      public boolean setPosition(double xMouse,double yMouse)
      {
       xMouse-=mother.x;
       yMouse-=mother.y;
       double m=magnitude(xMouse,yMouse);
       if ( m>0.0 ) {
          xMouse/=m;
          yMouse/=m;
          x=(int)(mother.x + dist*xMouse + 0.5);
          y=(int)(mother.y + dist*yMouse + 0.5);
          return true;
       }
       return false;
      }


      static private double magnitude(double x0,double y0)
      {
       x0=Math.abs(x0);
       y0=Math.abs(y0);

              if ( x0<y0 ) {
                 x0/=y0;
                 x0=y0*Math.sqrt(1.0 + x0*x0);
       } else if ( x0>0.0 ) {
                 y0/=x0;
                 x0*=Math.sqrt(1.0 + y0*y0);
       }

       return x0;
      }
}


class Orbit
{
      final double twopi=2.0*Math.PI;
      Eyes mother;
      double r,angle;
      int i,maxRadius,minRadius,x,xDot,y,yDot;


      public Orbit(int x,int y,Eyes mother)
      {
       this.x=x;
       this.y=y;
       this.mother=mother;
       maxRadius=(int)((mother.w + mother.h)/9.0 + 0.5);
       maxRadius=(int)(0.95*maxRadius + 0.5);
       minRadius=maxRadius - 10;
      }


      public void draw(Graphics g)
      {
       g.setColor(Color.black.brighter());
       g.fillOval(x - maxRadius,y - maxRadius,2*maxRadius,2*maxRadius);
       g.setColor(Color.white.brighter());
       g.fillOval(x - minRadius,y - minRadius,2*minRadius,2*minRadius);
       g.setColor(Color.red.brighter());
       for ( i=0 ; i<10 ; ++i ) {
           r=Math.sqrt(mother.rndm.nextDouble())*minRadius;
           angle=mother.rndm.nextDouble()*twopi;
           xDot=x + (int)(r*Math.cos(angle));
           yDot=y + (int)(r*Math.sin(angle));
           g.fillOval(xDot - 3,yDot - 3,6,6);
       }
      }
}


class ThickArc extends Rectangle
{     
      Color color;
      int startAngle,arcAngle,repeat;


      public ThickArc(int x,int y,int w,int h,int sa,int aa,int repeat,
                      Color color)
      {
       super(x,y,w,h);
       startAngle=sa;
       arcAngle=aa;
       this.repeat=repeat;
       this.color=color;
      }


      public void draw(Graphics g)
      {
       int yc=y;
       g.setColor(color);
       for ( int i=0 ; i<repeat ; ++i,++yc )
           g.drawArc(x,yc,width,height,startAngle,arcAngle);
      }
}