PC Plus SuperCD (UK) 2000 May/PCP163A.iso/handson/files/java/stage2/HawkRay.class

Java Class File | 2000-01-30 | 4.2 KB | 173 lines

import java.applet.Applet;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.image.MemoryImageSource;
import java.awt.image.PixelGrabber;

public class HawkRay extends Applet implements Runnable {
   // $FF: renamed from: w int
   protected int field_0;
   // $FF: renamed from: h int
   protected int field_1;
   protected int dispx;
   protected int dispz;
   protected int m_sw;
   protected int m_sh;
   protected int[] texel;
   protected int m_cos1;
   protected int m_sin1;
   protected int xres;
   protected int yres;
   protected int m_alti = 120;
   // $FF: renamed from: d int
   protected int field_2 = 1;
   protected int viewA = 180;
   protected int dViewA = 3;
   protected int[] screenPixel;
   protected MemoryImageSource screenMem;
   protected Image screenImage;
   private int garbageCnt;
   private Thread theThread;
   private boolean m_tAnimate = true;

   public void init() {
      ((Component)this).addMouseListener(new HawkRay$1(this));
      MediaTracker var1 = new MediaTracker(this);
      Image var2 = ((Applet)this).getImage(((Applet)this).getDocumentBase(), ((Applet)this).getParameter("image"));
      this.m_sh = ((Component)this).getSize().height << 2;
      this.m_sw = ((Component)this).getSize().width;
      this.screenPixel = new int[this.m_sw * this.m_sh >> 2];
      this.screenMem = new MemoryImageSource(this.m_sw, this.m_sh >> 2, this.screenPixel, 0, this.m_sw);
      var1.addImage(var2, 0);

      try {
         var1.waitForID(0);
      } catch (Exception var5) {
      }

      this.field_0 = var2.getWidth(this);
      this.field_1 = var2.getHeight(this);
      this.texel = new int[this.field_0 * this.field_1];
      PixelGrabber var3 = new PixelGrabber(var2.getSource(), 0, 0, this.field_0, this.field_1, this.texel, 0, this.field_0);

      try {
         var3.grabPixels();
      } catch (Exception var4) {
         return;
      }

      Object var6 = null;
   }

   public void start() {
      (this.theThread = new Thread(this)).start();
   }

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

   }

   public void run() {
      Graphics var1 = ((Component)this).getGraphics();

      while(this.theThread != null && this.m_tAnimate) {
         if (this.viewA > 720) {
            this.dViewA = -1;
         } else if (this.viewA < 360) {
            this.dViewA = 1;
         }

         this.viewA += this.dViewA;
         this.renderImage();
         Thread.yield();
         this.paint(var1);
         if (this.garbageCnt++ > 120) {
            System.gc();
            this.garbageCnt = 0;
         }
      }

   }

   public void update(Graphics var1) {
      this.paint(var1);
   }

   public void paint(Graphics var1) {
      if (this.screenImage != null) {
         var1.drawImage(this.screenImage, 0, 0, this);
      }

   }

   protected void renderImage() {
      int var15 = 0;
      this.m_alti = (int)((double)240.0F - (double)120.0F * Math.sin((double)this.viewA * 3.1415926 / (double)180.0F));
      this.m_sin1 = (int)((double)1024.0F * Math.sin((double)this.viewA * 3.1415926 / (double)180.0F));
      this.m_cos1 = (int)((double)1024.0F * Math.cos((double)this.viewA * 3.1415926 / (double)180.0F));
      double var9 = (double)(this.field_0 * (this.viewA % 360) / 360);
      this.dispz += this.m_cos1 << 3;
      this.dispx += this.m_sin1 << 3;

      for(int var16 = (3 * this.m_sh >> 2) + 1; var16 <= this.m_sh; ++var16) {
         this.planePoint(0, var16);
         double var1 = (double)this.xres;
         double var3 = (double)this.yres;
         this.planePoint(this.m_sw - 1, var16);
         double var5 = (double)this.xres;
         double var7 = (double)this.yres;
         double var11 = (var5 - var1) / (double)(this.m_sw - 1);
         double var13 = (var7 - var3) / (double)(this.m_sw - 1);
         var11 = (var11 % (double)(this.field_0 << 10) + (double)(this.field_0 << 10)) % (double)(this.field_0 << 10);
         var13 = (var13 % (double)(this.field_1 << 10) + (double)(this.field_1 << 10)) % (double)(this.field_1 << 10);

         for(int var17 = 0; var17 < this.m_sw; ++var17) {
            this.setTexel(var15++, (int)var1, (int)var3);
            var1 += var11;
            var3 += var13;
         }
      }

      this.screenImage = ((Component)this).createImage(this.screenMem);
   }

   void setTexel(int var1, int var2, int var3) {
      int var4 = this.modIt(this.field_0 - var2 >> 10, this.field_0);
      int var5 = this.modIt(var3 >> 10, this.field_1);
      this.screenPixel[var1] = this.texel[var5 * this.field_0 + var4];
   }

   int modIt(int var1, int var2) {
      int var3 = var1 % var2;
      if (var3 < 0) {
         var3 += var2;
      }

      return var3;
   }

   protected void planePoint(int var1, int var2) {
      double var5 = (double)(var2 << 1) / (double)this.m_sh - (double)1.0F;
      double var7 = (double)this.field_2 * ((double)this.m_alti - var5) / var5;
      double var3 = (double)(var1 - (this.m_sw >> 1)) / (double)this.m_sw;
      double var9 = var3 * (var7 + (double)this.field_2) / (double)this.field_2;
      this.xres = (int)((double)this.m_cos1 * var9 + (double)this.m_sin1 * var7) + this.dispx;
      this.yres = (int)((double)(-this.m_sin1) * var9 + (double)this.m_cos1 * var7) + this.dispz;
   }

   // $FF: synthetic method
   static boolean access$0(HawkRay var0) {
      return var0.m_tAnimate;
   }

   // $FF: synthetic method
   static void access$1(HawkRay var0, boolean var1) {
      var0.m_tAnimate = var1;
   }
}