Grid World 1
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Understanding GridWorld
Exercises
- Set 1, Nos. 1-10, page 6
- Exercises 1-4, page 8
BoxBug.java
/*
* AP(r) Computer Science GridWorld Case Study:
* Copyright(c) 2005-2006 Cay S. Horstmann (http://horstmann.com)
*
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* @author Cay Horstmann
* @author Chris Nevison
* @author Barbara Cloud Wells
*/
import info.gridworld.actor.Bug;
/**
* A <code>BoxBug</code> traces out a square "box" of a given size. <br />
* The implementation of this class is testable on the AP CS A and AB exams.
*/
public class BoxBug extends Bug
{
private int steps;
private int sideLength;
/**
* Constructs a box bug that traces a square of a given side length
* @param length the side length
*/
public BoxBug(int length)
{
steps = 0;
sideLength = length;
}
/**
* Moves to the next location of the square.
*/
public void act()
{
if (steps < sideLength && canMove())
{
move();
steps++;
}
else
{
turn();
turn();
steps = 0;
}
}
}
BoxBugRunner.java
/*
* AP(r) Computer Science GridWorld Case Study:
* Copyright(c) 2005-2006 Cay S. Horstmann (http://horstmann.com)
*
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* @author Cay Horstmann
* @author Chris Nevison
* @author Barbara Cloud Wells
*/
import info.gridworld.actor.ActorWorld;
import info.gridworld.grid.Location;
import java.awt.Color;
/**
* This class runs a world that contains box bugs. <br />
* This class is not tested on the AP CS A and AB exams.
*/
public class BoxBugRunner
{
public static void main(String[] args)
{
ActorWorld world = new ActorWorld();
BoxBug alice = new BoxBug(6);
alice.setColor(Color.ORANGE);
BoxBug bob = new BoxBug(3);
world.add(new Location(7, 8), alice);
world.add(new Location(5, 5), bob);
world.show();
}
}
BugRunner.java
/*
* AP(r) Computer Science GridWorld Case Study:
* Copyright(c) 2005-2006 Cay S. Horstmann (http://horstmann.com)
*
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* @author Cay Horstmann
*/
import info.gridworld.actor.ActorWorld;
import info.gridworld.actor.Bug;
import info.gridworld.actor.Rock;
/**
* This class runs a world that contains a bug and a rock, added at random
* locations. Click on empty locations to add additional actors. Click on
* populated locations to invoke methods on their occupants. <br />
* To build your own worlds, define your own actors and a runner class. See the
* BoxBugRunner (in the boxBug folder) for an example. <br />
* This class is not tested on the AP CS A and AB exams.
*/
public class BugRunner
{
public static void main(String[] args)
{
ActorWorld world = new ActorWorld();
world.add(new Bug());
world.add(new Rock());
world.show();
}
}