PC Online 1997 October/PCO1097.ISO/FilesBBS/FREI/CUECARDS.EXE/CueCards.class

Java Class File | 1997-03-11 | 5.3 KB | 197 lines

import java.applet.Applet;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;

public class CueCards extends Applet implements Runnable {
   static boolean dispCopy;
   Image origImg;
   Image backImg;
   Image animImg;
   // $FF: renamed from: w1 int
   int field_0;
   // $FF: renamed from: h1 int
   int field_1;
   Graphics backG;
   Graphics finG;
   Thread nick;
   int frameNo;
   int frames = 12;
   int period = 50;
   boolean needAnim;
   boolean imLoaded;
   boolean needImage;
   boolean animReady;
   double angle1;
   int imageNo = 1;
   Color backCol;

   public void start() {
      if (this.nick == null) {
         this.nick = new Thread(this);
         this.nick.start();
      }

   }

   public void stop() {
      if (this.nick != null) {
         this.nick.stop();
         this.nick = null;
      }

   }

   public void loadImage() {
      MediaTracker tracker = new MediaTracker(this);
      String nextImage = ((Applet)this).getParameter("image" + this.imageNo);
      if (nextImage == null) {
         this.imageNo = 1;
         nextImage = ((Applet)this).getParameter("image1");
      }

      ++this.imageNo;
      this.imLoaded = false;
      this.origImg = ((Applet)this).getImage(((Applet)this).getDocumentBase(), nextImage);
      tracker.addImage(this.origImg, 0);

      try {
         tracker.waitForAll();
      } catch (InterruptedException var5) {
      }

      this.field_0 = this.origImg.getWidth(this);
      this.field_1 = this.origImg.getHeight(this);
   }

   public void rotateImage(Graphics g, double angle) {
      double twistAngle = angle;
      double quart = (Math.PI / 2D);
      double oct = (Math.PI / 4D);
      if (angle > oct) {
         this.shearY(g, (double)1.0F);
         this.shearX(g, (double)1.0F);
         this.shearY(g, (double)1.0F);
         twistAngle = angle - quart;
      }

      this.shearX(g, Math.tan(twistAngle / (double)2.0F));
      this.shearY(g, Math.sin(twistAngle));
      this.shearX(g, Math.tan(twistAngle / (double)2.0F));
   }

   public void shearX(Graphics g, double shearing) {
      for(int i = 0; i < this.field_1 << 1; ++i) {
         double l = (double)i * -shearing + (double)this.field_1 * shearing;
         g.copyArea(0, i, this.field_0 * 3 >> 1, 1, (int)l, 0);
         g.drawLine((int)l, i, 0, i);
         g.drawLine((int)l + (this.field_0 * 3 >> 1), i, this.field_0 * 3 >> 1, i);
      }

   }

   public void run() {
      while(this.nick != null) {
         if (this.needImage) {
            this.needImage = false;
            this.loadImage();
         }

         if (this.needAnim) {
            this.needAnim = false;
            this.animReady = false;
            this.createAnim();
         }

         ((Component)this).repaint();
         if (this.frameNo < this.frames) {
            if (this.frameNo == this.frames - 1) {
               this.needAnim = true;
            }

            ++this.frameNo;
         } else if (this.frameNo >= this.frames) {
            if (this.frameNo == this.frames) {
               this.needImage = true;
            }

            if (this.frameNo == (this.frames << 1) - 1) {
               this.frameNo = 0;
            }

            ++this.frameNo;
         }

         try {
            Thread.sleep(50L);
         } catch (InterruptedException var3) {
         }
      }

   }

   public void shearY(Graphics g, double shearing) {
      for(int i = 0; i < this.field_0 * 3 >> 1; ++i) {
         double l = (double)i * shearing;
         g.copyArea(i, 0, 1, this.field_1 << 1, 0, (int)l);
         g.drawLine(i, (int)l, i, 0);
         g.drawLine(i, (int)l + (this.field_1 << 1), i, this.field_1 << 1);
      }

   }

   public void init() {
      if (!dispCopy) {
         System.out.println("cueCards v 1.0 for Java");
         System.out.println("Copyright (c) " + "David Griffiths, 1996. " + "All rights reserved.");
         System.out.println("For more information visit " + "http://www.demon.co.uk/davidg,");
         System.out.println("or contact: " + "[e-mail]");
         dispCopy = true;
      }

      this.backCol = new Color(Integer.parseInt(((Applet)this).getParameter("bgcolor").substring(1), 16));
      ((Component)this).setBackground(this.backCol);
      this.loadImage();
   }

   public void update(Graphics g) {
      this.paint(g);
   }

   public void paint(Graphics g) {
      if (this.frameNo < this.frames) {
         g.drawImage(this.origImg, 0, this.frameNo * this.frameNo * this.field_1 / ((this.frames - 1) * (this.frames - 1)) - this.field_1, this);
      } else if (this.frameNo == this.frames && this.animReady) {
         g.drawImage(this.origImg, 0, 0, this);
      } else if (this.frameNo > this.frames && this.animReady) {
         int i = this.frameNo - this.frames;
         g.drawImage(this.animImg, 0, -i * this.field_1, this);
      } else if (this.origImg != null) {
         g.drawImage(this.origImg, 0, 400, this);
      }

   }

   public void createAnim() {
      System.gc();
      if (this.backImg == null) {
         this.backImg = ((Component)this).createImage(this.field_0 * 3 >> 1, this.field_1 << 1);
         this.backG = this.backImg.getGraphics();
         this.animImg = ((Component)this).createImage(this.field_0, this.frames * this.field_1);
         this.finG = this.animImg.getGraphics();
         this.backG.setColor(this.backCol);
      }

      for(int phase = 0; phase < this.frames; ++phase) {
         this.backG.fillRect(0, 0, this.field_0, this.field_1 << 1);
         this.backG.drawImage(this.origImg, 0, 0, this);
         this.rotateImage(this.backG, 1.8849555921538759 * (double)phase * (double)phase / (double)this.frames / (double)this.frames);
         this.finG.drawImage(this.backImg, 0, phase * this.field_1, this);
      }

      this.animReady = true;
   }
}