shuimian.java

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import java.applet.*;
import java.awt.*;
public class ShuiMian extends Applet implements Runnable
{
   Thread thread = null;
   private Graphics g, refraction;
   private Image image, refimage;
   private int  currentImg;
   private int  imageW  = 0, imageH = 0;
   private int  ovalW  = 0, ovalH = 0;
   private boolean  finishLoad = false;
   private final int frames = 12;
   private String name = "";

   public void init()
   {
      String param;
      param = getParameter("image");
      if (param != null)
         name = param;
  }

   public void paint(Graphics g)
   {
     if (!finishLoad)
         return;
     if (refimage != null)
     {
       g.drawImage (refimage, (-currentImg * imageW), imageH, this);
       g.drawImage (refimage, ((frames-currentImg) * imageW), imageH, this);
     }
     g.drawImage (image, 0, -1, this);
  }
   public void start()
   {
     if (thread == null)
     {
         thread = new Thread(this);
         thread.start();
    }
  }
   public void run()
   {
      currentImg = 0;
      g = getGraphics();
      MediaTracker imageTracker = new MediaTracker(this);
      String strImage;
      image = getImage(getDocumentBase(), name);
      imageTracker.addImage(image,0);
      try
      {
          imageTracker.waitForAll();
          finishLoad = !imageTracker.isErrorAny();
      }
      catch (InterruptedException e) {}
      imageW  = image.getWidth(this);
      System.out.println(imageW);
      imageH = image.getHeight(this);
      createShui();
      repaint();
      while (true)
      {
        try
        {
          if (!finishLoad)
               return;
          if (refimage != null)
          {
            g.drawImage (refimage, (-currentImg * imageW), imageH, this);
            g.drawImage (refimage, ((frames-currentImg) * imageW), imageH, this);
          }
          g.drawImage (image, 0, -1, this);
          if (++currentImg == frames)
             currentImg = 0;
          Thread.sleep(50);
          }catch (InterruptedException e)
          {
            stop();
          }
       }
   }

   public void createShui()
   {
     Image back = createImage (imageW, imageH + 1);
     Graphics offg = back.getGraphics();
     int phase = 0;
     int x, y;
     double p1;
     offg.drawImage (image, 0, 1, this);
     for (int i = 0; i < (imageH >> 1); i++)
     {
       offg.copyArea (0, i, imageW, 1, 0, imageH - i);
       offg.copyArea (0, imageH - 1 - i, imageW, 1,0, -imageH + 1 + (i << 1));
       offg.copyArea (0, imageH, imageW, 1, 0, -1 - i);
     }
     refimage = createImage ((frames + 1) * imageW, imageH);
     refraction = refimage.getGraphics();
     refraction.drawImage (back, frames * imageW, 0, this);
     for (phase = 0; phase < frames; phase++)
     {
        p1 = 2 * Math.PI * (double)phase / (double)frames;
        x = (frames - phase) * imageW;
        for (int i = 0; i < imageH; i++)
        {
            y = (int)((imageH/14) * ((double) i + 28.0)
             * Math.sin ((double)((imageH/14)*(imageH - i))/(double)(i + 1) + p1)/ (double) imageH);
            if (i < -y)
             refraction.copyArea (frames * imageW, i, imageW, 1,-x, 0);
            else
          refraction.copyArea (frames * imageW, i + y,imageW, 1, -x, -y);
        }
      }
      offg.drawImage (image, 0, 1, this);
      image = back;
  }
}