Adventures in Minecraft

[Minecraft Games] Hello Minecraft World

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<br />
<br />
IN THIS BOOK you are going to learn how to write programs that interact with your
Minecraft world, allowing you to do some very exciting things. You will be using a programming
language called Python to do it. This way of controlling the Minecraft world
from a Python program was first created for Minecraft: Pi Edition on the Raspberry Pi.
If you don’t have a Raspberry Pi but have Minecraft for Windows or Apple Mac instead,
that’s ok—you will just need to do some extra work on the set-up before you get
started, which you’ll be shown how to do.<br />
<br />
This book is full of adventures that teach you how to write programs for the Minecraft
game. It’s packed with all sorts of things you can do with Minecraft to entertain your
friends and make the game even more fun to play. You will discover some pretty flashy
ways to move your player around and before long you’ll be finding it easy to build
whole cities and Minecraft creations that have never been seen before.
The Python programming language comes with a code editor called IDLE, and you will
be using this to create, edit and run the programs created in these adventures.<br />
<br />
When computer programmers learn a new programming language or a new way of
doing something, they always start by writing a “hello world” program. This is a really
simple program that displays “hello world” on the screen, to make sure everything is
installed and working properly.
In this first adventure, you will set up your computer to allow you to write a program
that displays the text “Hello Minecraft World” on the Minecraft chat (see Figure).<br />
<br />
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<br />
To do the Minecraft programming in this book, you need one of these three types of
computer: a PC running Microsoft Windows; an Apple Mac running MacOS X; or a
Raspberry Pi running Raspbian. The way you set up your computer will be different
depending on which sort you have but, once you have set it up, you program Minecraft
in exactly the same way on all of them. To make it easier for you to set up your computer,
you can download a starter kit from the book’s companion website (www.wiley.
com/go/adventuresinminecraft). The starter kits have been tested to make sure all
the Adventures in this book work properly. You’ll see that your starter kit contains a
README file, which you should have a look at. It describes what the kit contains and<br />
<br />
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how it was created; you could conceivably use this information to set up your own
computer from scratch, although this is not recommended. You’ll get a lot more out
of it by following the instructions in this book.
Make sure you follow the instructions for your type of computer, either “Setting Up
Your Raspberry Pi for Programming Minecraft” or “Setting Up Your PC or Apple Mac
for Programming Minecraft”.<br />
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IN THIS BOOK you are going to learn how to write programs that interact with your Minecraft world, allowing you to do some very...

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Posted at 08:51 | |

[Minecraft Games] Reaching Out

In Appendix A you will find ways to take your Minecraft programming knowledge further,
with lists of websites, organisations, videos and other resources. Many of these
resources include forums where you can ask questions or get in touch with other
Minecraft programmers.<br />
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You can also contact the authors by sending us a message through our websites:
Martin: www.stuffaboutcode.com
David: http://blog.whaleygeek.co.uk
Time to start your adventures!<br />
<br />
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In Appendix A you will find ways to take your Minecraft programming knowledge further, with lists of websites, organisations, videos and oth...

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[Minecraft Games] Conventions

You’ll notice that there are special boxes throughout this book, to guide and support
you. Here is what they look like:<br />
<br />
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You will also find two sets of sidebars in the book. Challenge sidebars give you extra</div>
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tasks you can accept if you want to take the project a bit further, perhaps by making</div>
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changes or adding new features. Digging into the Code sidebars explain in a bit more</div>
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detail some concept or feature of the program, to give you a better understanding of</div>
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<br /></div>
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the programming language Python. These sidebars mean you can focus on getting the
programs working first, and then read in more detail about how they work and ways
you can extend them further once they are working.</div>
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When you are following our steps or instructions using code, you should type the code
in exactly as we have described it in the instructions. Python is a language where the
amount of space at the start of the line (the indent) is important to the meaning of the
program, so take extra special care to make sure you put enough spaces at the left of
each line. We have coloured the code listing boxes for you so that it makes it easier to
see how much each line needs to be indented. Don’t worry too much about it—we
explain indenting in the early adventures when you first need to use it.
Sometimes you need to type a very long line of code, longer than will fit on a single line
in this book. If you see ↩ at the end of a line of code, it means that line and the following
line are part of a single line of code, so you should type them as one line, not separate
lines. For example, the following code should be typed on one line, not two:<br />
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Most adventures include a Quick Reference Table at the end to sum up the main programming</div>
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statements or concepts. You can refer to these guides when you need a</div>
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refresher. There is also a reference section in Appendix B, which shows you the most</div>
<div class="separator" style="clear: both;">
important programming statements for Minecraft and Python. We hope you will find</div>
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this handy to refer to as you progress through your adventures.</div>
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Whenever you complete an adventure, you unlock an achievement and collect a new</div>
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badge. You can collect the badges to represent these achievements from the Adventures</div>
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in Minecraft companion website (www.wiley.com/go/adventuresinminecraft).</div>
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You’ll notice that there are special boxes throughout this book, to guide and support you. Here is what they look like: ...

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Posted at 22:46 | |

[Minecraft Games] Other Sources of Help

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Computers are complex devices, and operating systems and software are changing all
the time. We have tried to protect you and your adventures from future changes as
much as possible by providing a downloadable starter kit in Adventure 1 that should
give you most of what you need. However, if you run into problems or need specific
help, here are some useful places to go:<br />
<br />
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<blockquote class="tr_bq">
Sign up for a user ID and downloading and installing Minecraft: http://minecraft.net<br />
Play the Minecraft game: http://minecraft.gamepedia.com/Minecraft_Wiki<br />
Raspberry Pi: www.raspberrypi.org<br />
Microsoft Windows: http://support.microsoft.com<br />
Apple Mac and Mac OS X: www.apple.com/support<br />
The Python language: www.python.org<br />
The IDLE programming IDE: https://docs.python.org/2/library/idle.html<br />
Minecraft Pi edition: http://pi.minecraft.net<br />
Craft-bukkit server: http://wiki.bukkit.org<br />
Raspberry Juice bukkit plug in: http://dev.bukkit.org/bukkit-plugins/raspberryjuice</blockquote>
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Computers are complex devices, and operating systems and software are changing all the time. We have tried to protect you and your a...

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Posted at 22:35 | |

[Minecraft Games] The Companion Website

Throughout this book you’ll find references to the Adventures in Minecraft companion<br />
website at www.wiley.com/go/adventuresinminecraft. The website is where you’ll find<br />
the starter kits you will need to start programming in Minecraft, together with a collection<br />
of video tutorials we have put together to help you if you get stuck. Code files<br />
for some of the bigger projects can also be found on the website.<br />
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<br />
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You will also find on the companion website a complete extra bonus adventure! With<br />
this adventure you will build a fully functional passenger lift simulation inside<br />
Minecraft allowing you to whizz up and down through the world. This bonus adventure<br />
is quite challenging and should exercise all of the skills that you have learned and<br />
practiced throughout this book, including controlling your lift with electronic circuits.<br />
<br />
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Our publisher (Wiley) has kindly allowed us to provide a reference appendix in a PDF
format that you can download from the companion website. Keep it by your side as a
handy reference as you work through these Minecraft adventures. You can also use it
in any programming projects you embark on in the future. The Wiley website also
includes a glossary. Although definitions are included in the adventures themselves,
anytime you want to look up a word, you can go online.<br />
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Throughout this book you’ll find references to the Adventures in Minecraft companion website at www.wiley.com/go/adventuresinminecraft. The...

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Posted at 22:31 | |

[Minecraft Games] How This Book Is Organised

Every chapter of the book is a separate adventure, teaching you new skills and concepts<br />
as you program and test the projects. The book is organised so that each adventure<br />
is a standalone project, but you might find it easier to work through them in order,<br />
as we build up your understanding of the programming concepts gradually throughout<br />
the book.<br />
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<br />
It is vital that you do Adventure 1 before doing anything else. This is because it shows<br />
you how to download and install everything you need, and to check that it all works<br />
properly. We introduce some basic steps in this adventure that you need to know how<br />
to do in all the other adventures, but will give you some reminders in the earlier adventures<br />
as you get started.<br />
<br />
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The first three adventures are written for beginners who have little or no programming<br />
knowledge, and we explain all the jargon and concepts as you work through them. In<br />
Adventures 2, 3 and 4, you cover the key parts of any good Minecraft game. These<br />
include sensing things that happen in the Minecraft world, doing some calculations with<br />
some simple maths, and making your programs behave differently, for example by displaying<br />
a message on the chat or automatically creating blocks in the world. You will<br />
use these three concepts of sensing, calculating and behaving throughout the book to<br />
build bigger and more exciting Minecraft programs!<br />
<br />
Adventures 5 and 6 build on what you learned in the earlier adventures and explore some<br />
exciting ways of linking the Minecraft virtual world to the real world. You will experiment<br />
with the exciting topic of physical computing by building some small electronic<br />
circuits that cause things to happen inside Minecraft and respond to things that happen<br />
in Minecraft. There is an abundance of exciting ideas and games you could create using<br />
this as a basis! Adventure 6 looks at ways you can bring in large amounts of data from<br />
data files to save and duplicate large structures with a 3D “duplicating machine”.<br />
Adventures 7 and 8 introduce the free MinecraftStuff module, which makes it possible<br />
to use blocks to build lines, circles and other 2D shapes, and also some fantastic 3D<br />
spheres and pyramids. These can form the beginnings of huge structures that would<br />
be very hard to build by hand. Adventure 8 shows how you can add personalities to<br />
moving objects to give them their own intelligence. With these techniques, you can<br />
write some exciting “games inside a game” that will amaze your friends.<br />
<br />
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Adventure 9 draws on all the programming concepts and skills from the earlier adventures<br />
to create one final big project—an awesome game with scoring, and moving<br />
objects that you have to avoid or carry around with you. In this adventure, you also<br />
have the option to experiment with physical computing by using electronic components,<br />
allowing you to do things in the game by pressing buttons in the real world.<br />
Appendix A (“Where Next”) suggests a whole range of resources that you can use to<br />
extend and enhance your adventures, learn more about programming in Python and<br />
create even more awesome Minecraft programs based on what you have learnt<br />
throughout this book.<br />
<br />
In Appendix B (“Quick Reference”) we have included a comprehensive reference guide<br />
to the programming features used throughout the book, along with a reference to the<br />
programming statements that are specific to Minecraft, and a table of block types that<br />
you can build with. You’ll find this is an invaluable reference section to help with all<br />
your own projects and inventions as well!<br />
<br />
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The glossary provides a handy quick reference to all the jargon and terminology we have<br />
introduced throughout the book, and is a collection of all definitions from each adventure.<br />
<br />

Every chapter of the book is a separate adventure, teaching you new skills and concepts as you program and test the projects. The book is o...