src/appletbots/gatherers/GatherersWorld.java

   1 /*
   2  * Copyright (c) 2002 Erik Rasmussen - All Rights Reserved
   3  */
   4 package appletbots.gatherers;
   5
   6 import appletbots.World;
   7 import appletbots.WorldObject;
   8 import appletbots.geometry.Point;
   9
  10 import java.awt.*;
  11 import java.util.Iterator;
  12
  13 /**
  14  * This class represents a world for Gatherers to collect food.  It consists
  15  * of two "home bases" in opposite corners.
  16  *
  17  * @author Erik Rasmussen
  18  */
  19 public class GatherersWorld extends World
  20 {
  21         /**
  22          * The size of the home base zone
  23          */
  24         private int zoneSize;
  25
  26         /**
  27          * Constructs a new gatherers world with the given dimensions
  28          *
  29          * @param width    The width of the world in pixels
  30          * @param height   The height of the world in pixels
  31          * @param zoneSize The size of the home base zones measured by the number of
  32          *                 pixels from world corners where the zone boundary hits
  33          *                 the edge of the world
  34          */
  35         public GatherersWorld(final int width, final int height, final int zoneSize)
  36         {
  37                 super(width, height);
  38                 this.zoneSize = zoneSize;
  39         }
  40
  41         /**
  42          * Paints the objects in the world
  43          *
  44          * @param g The graphics object on which to paint the objects
  45          */
  46         protected void paintObjects(final Graphics g)
  47         {
  48                 g.setColor(Color.green);
  49                 g.drawLine(0, zoneSize, zoneSize, 0);
  50                 g.drawLine(getWorldWidth() - zoneSize, getWorldHeight(), getWorldWidth(), getWorldHeight() - zoneSize);
  51                 super.paintObjects(g);
  52         }
  53
  54         /**
  55          * Returns whether or not the given object is in the home base zone of
  56          * team specified by the bottomRightTeam boolean parameter
  57          *
  58          * @param object          The object to check
  59          * @param bottomRightTeam Checks the home base zone in the bottom right if
  60          *                        true, and the zone in the top left if false
  61          * @return Whether or not the given object is in the home base zone of
  62          *         team specified by the bottomRightTeam boolean parameter
  63          */
  64         public boolean isInHome(final WorldObject object, final boolean bottomRightTeam)
  65         {
  66                 final Point location = getData(object).getLocation();
  67                 if (bottomRightTeam)
  68                 {
  69                         return (getWorldWidth() - location.x) + (getWorldHeight() - location.y) < zoneSize;
  70                 }
  71                 else
  72                 {
  73                         return location.x + location.y < zoneSize;
  74                 }
  75         }
  76
  77         /**
  78          * Called by the WorldThread.  Checks if one team is has won by getting all
  79          * the food into its home base zone, and pauses the world if a win has
  80          * occurred.  (Also causes World.incrementTime().)
  81          */
  82         public void incrementTime()
  83         {
  84                 super.incrementTime();
  85                 boolean blueWins = true;
  86                 boolean redWins = true;
  87                 for (Iterator iterator = objectsTable.keySet().iterator(); iterator.hasNext();)
  88                 {
  89                         final WorldObject object = (WorldObject) iterator.next();
  90                         if (object instanceof Food)
  91                         {
  92                                 if (isInHome(object, true))
  93                                         redWins = false;
  94                                 else if (isInHome(object, false))
  95                                         blueWins = false;
  96                                 else
  97                                 {
  98                                         blueWins = false;
  99                                         redWins = false;
 100                                 }
 101                         }
 102                 }
 103                 if (blueWins || redWins)
 104                         stopThread();
 105         }
 106 }