NET/worlds/console/Conveyor.java


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package NET.worlds.console;

import NET.worlds.scape.FrameEvent;
import NET.worlds.scape.FrameHandler;
import NET.worlds.scape.Point3;
import NET.worlds.scape.Point3Temp;
import NET.worlds.scape.Restorer;
import NET.worlds.scape.Saver;
import NET.worlds.scape.SuperRoot;
import NET.worlds.scape.TooNewException;
import NET.worlds.scape.WObject;
import java.io.IOException;
import java.util.Enumeration;

public class Conveyor extends SuperRoot implements FrameHandler {
   private Point3 vector;
   private static Object classCookie = new Object();

   public Conveyor(Point3Temp direction, float speed) {
      this.vector = new Point3(direction.normalize().times(speed));
   }

   public Conveyor(Point3Temp v) {
      this.vector = new Point3(v);
   }

   @Override
   public boolean handle(FrameEvent e) {
      Enumeration<WObject> stuff = (Enumeration<WObject>)e.receiver.getContents();
      Point3Temp delta = this.vector;
      delta.times(e.dt / 1000.0F);

      while (stuff.hasMoreElements()) {
         WObject thing = stuff.nextElement();
         thing.moveThrough(delta);
      }

      return true;
   }

   @Override
   public void saveState(Saver s) throws IOException {
      s.saveVersion(1, classCookie);
      super.saveState(s);
      s.save(this.vector);
   }

   @Override
   public void restoreState(Restorer r) throws IOException, TooNewException {
      switch (r.restoreVersion(classCookie)) {
         case 1:
            super.restoreState(r);
         case 0:
            this.vector = (Point3)r.restore();
            return;
         default:
            throw new TooNewException();
      }
   }
}