Symantec Visual Cafe for Java 2.5/symantec-visual-cafe-2.5-database-dev-edition.iso/VCafe/WDESAMPL.BIN/CLSFractal.class

Java Class File | 1997-03-21 | 3.9 KB | 211 lines

import java.applet.Applet;
import java.awt.Component;
import java.awt.Event;
import java.awt.Graphics;
import java.util.Stack;

public class CLSFractal extends Applet implements Runnable {
   ContextLSystem cls;
   int fractLevel = 1;
   int repaintDelay = 50;
   boolean incrementalUpdates;
   float startAngle;
   float rotAngle;
   float Xmin;
   float Xmax;
   float Ymin;
   float Ymax;
   int border;
   boolean normalizescaling;
   Thread kicker;
   String savedPath;

   public void init() {
      this.cls = new ContextLSystem(this);
      String var1 = ((Applet)this).getParameter("level");
      if (var1 != null) {
         this.fractLevel = Integer.parseInt(var1);
      }

      var1 = ((Applet)this).getParameter("incremental");
      if (var1 != null) {
         this.incrementalUpdates = var1.equals("true");
      }

      var1 = ((Applet)this).getParameter("delay");
      if (var1 != null) {
         this.repaintDelay = Integer.parseInt(var1);
      }

      var1 = ((Applet)this).getParameter("startAngle");
      if (var1 != null) {
         this.startAngle = Float.valueOf(var1);
      }

      var1 = ((Applet)this).getParameter("rotAngle");
      if (var1 != null) {
         this.rotAngle = Float.valueOf(var1);
      }

      this.rotAngle = this.rotAngle / 360.0F * 2.0F * (float)Math.PI;
      var1 = ((Applet)this).getParameter("border");
      if (var1 != null) {
         this.border = Integer.parseInt(var1);
      }

      var1 = ((Applet)this).getParameter("normalizescale");
      if (var1 != null) {
         this.normalizescaling = var1.equals("true");
      }

   }

   public void run() {
      Thread var1 = Thread.currentThread();
      boolean var2 = false;

      while(this.kicker == var1 && this.cls.getLevel() < this.fractLevel) {
         this.cls.generate();
         if (this.kicker == var1 && this.incrementalUpdates) {
            ((Component)this).repaint();

            try {
               Thread.sleep((long)this.repaintDelay);
            } catch (InterruptedException var3) {
            }
         } else {
            var2 = true;
         }
      }

      if (this.kicker == var1) {
         this.kicker = null;
         if (var2) {
            ((Component)this).repaint();
         }
      }

   }

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

   public void stop() {
      this.kicker = null;
   }

   public boolean mouseUp(Event var1, int var2, int var3) {
      this.cls = new ContextLSystem(this);
      this.savedPath = null;
      this.start();
      return true;
   }

   public void paint(Graphics var1) {
      String var2 = this.cls.getPath();
      if (var2 == null) {
         super.paint(var1);
      } else {
         if (this.savedPath == null || !this.savedPath.equals(var2)) {
            this.savedPath = var2;
            this.render((Graphics)null, var2);
         }

         for(int var3 = 0; var3 < this.border; ++var3) {
            var1.draw3DRect(var3, var3, ((Component)this).size().width - var3 * 2, ((Component)this).size().height - var3 * 2, false);
         }

         this.render(var1, var2);
      }
   }

   void render(Graphics var1, String var2) {
      Stack var3 = new Stack();
      CLSTurtle var4;
      if (var1 == null) {
         this.Xmin = 1.0E20F;
         this.Ymin = 1.0E20F;
         this.Xmax = -1.0E20F;
         this.Ymax = -1.0E20F;
         var4 = new CLSTurtle(this.startAngle, 0.0F, 0.0F, 0, 0, 1.0F, 1.0F);
      } else {
         float var5 = this.Xmax - this.Xmin;
         if (var5 == 0.0F) {
            var5 = 1.0F;
         }

         float var6 = this.Ymax - this.Ymin;
         if (var6 == 0.0F) {
            var6 = 1.0F;
         }

         float var7 = (float)(((Component)this).size().width - this.border * 2 - 1) / var5;
         float var8 = (float)(((Component)this).size().height - this.border * 2 - 1) / var6;
         int var9 = this.border;
         int var10 = this.border;
         if (this.normalizescaling) {
            if (var7 < var8) {
               var10 = (int)((float)var10 + ((float)(((Component)this).size().height - this.border * 2) - (this.Ymax - this.Ymin) * var7) / 2.0F);
               var8 = var7;
            } else if (var8 < var7) {
               var9 = (int)((float)var9 + ((float)(((Component)this).size().width - this.border * 2) - (this.Xmax - this.Xmin) * var8) / 2.0F);
               var7 = var8;
            }
         }

         var4 = new CLSTurtle(this.startAngle, 0.0F - this.Xmin, 0.0F - this.Ymin, var9, var10, var7, var8);
      }

      for(int var11 = 0; var11 < var2.length(); ++var11) {
         switch (var2.charAt(var11)) {
            case '+':
               var4.rotate(this.rotAngle);
               break;
            case '-':
               var4.rotate(-this.rotAngle);
               break;
            case 'F':
               if (var1 == null) {
                  this.includePt(var4.X, var4.Y);
                  var4.jump();
                  this.includePt(var4.X, var4.Y);
               } else {
                  var4.draw(var1);
               }
               break;
            case '[':
               var3.push(var4);
               var4 = new CLSTurtle(var4);
               break;
            case ']':
               var4 = (CLSTurtle)var3.pop();
               break;
            case 'f':
               var4.jump();
         }
      }

   }

   void includePt(float var1, float var2) {
      if (var1 < this.Xmin) {
         this.Xmin = var1;
      }

      if (var1 > this.Xmax) {
         this.Xmax = var1;
      }

      if (var2 < this.Ymin) {
         this.Ymin = var2;
      }

      if (var2 > this.Ymax) {
         this.Ymax = var2;
      }

   }
}