青少年学习Unreal Tournament游戏编程指南

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《Unreal Tournament Game Programming for Teens》是一本专注于Unreal引擎脚本学习的电子书籍，由John P. Flynt博士与Brandon Booth共同编著。这本书旨在帮助青少年理解并掌握Unreal引擎的游戏编程技术，适合那些对游戏开发有兴趣，特别是想要在Unreal引擎平台上实践的年轻读者。该书深入浅出地介绍了Unreal Tournament（UT）这一经典的第一人称射击游戏引擎，它以其强大的图形渲染能力和高度可扩展性而在游戏开发领域享有盛誉。书中涵盖了基础概念，如蓝图系统（Blueprints）和C++编程语言的结合使用，以及如何通过这些工具创建游戏逻辑、角色行为、环境交互等内容。对于初学者来说，章节可能从编写简单的交互式脚本来启动，逐步引导读者理解和编写复杂的逻辑模块。作者John P. Flynt博士和Brandon Booth具备丰富的教学经验和实战经验，他们通过实例演示和清晰的解释，使读者能够快速上手并逐渐提升技能。书中还可能包括对Unreal Engine的版本控制、资源管理、网络编程等高级主题的讲解，以便读者在项目开发过程中能够处理复杂的问题。此外，该书特别强调版权问题，所有内容未经许可不得复制或传播，确保了知识产权的尊重。书中提醒读者，遇到软件支持问题时应直接联系制造商的技术支持，因为Thomson Course Technology PTR作为出版商并不提供此类服务。《Unreal Tournament Game Programming for Teens》是一本既实用又富有教育价值的资源，不仅适合青少年入门，也适合有一定基础的开发者提升在Unreal引擎上的技能，是游戏开发学习者的宝贵参考材料。通过阅读这本书，读者不仅能掌握Unreal引擎的编程技术，还能培养解决问题和团队协作的能力，为进一步进入游戏开发行业打下坚实的基础。

The book equips you to understand how object-oriented programming works. You learn

the difference between abstract classes and concrete classes, how inheritance works, and

how to override functions from base classes. You examine many features of the UnrealScript

programming language. With respect to Unreal Tournament itself, you do not play Unreal

Tournament during the course of this book.

As a renowned programmer once said, when programming is not fun something is wrong,

so it should not be inferred from the previous paragraph that this book, as a programming

book, represents something that is not fun. From beginning to end, it is hoped that the

reader finds in it a friendly, hands-on, and fun introduction to programming using

UnrealScript the Unreal Level Editor.

The Advisory

As for readers in general, if you are not familiar with Unreal Tournament, it is good to keep

in mind that the publishers of the game provide an advisory for it. The gist of the advisory

is that people under 17 should not play the game without consulting first with their par-

ents. (See the label for the exact advisory.) That makes the title of this book, which includes

the word “Teens,” stand out.

Epic provides a “stripped down” version for the educational community. This version of

the game engine is made available over the Internet. With just a few minor changes to com-

pensate for the file extensions, you can use this book with the stripped down version.

This book does not make use of the stripped down version, because you can still use pieces

of the commercial version to learn about programming without having to involve your-

self in the deeper dimensions of gameplay. In this book, your attention focuses on how to

derive classes from the classes in the Unreal Tournament class hierarchy, how to use fea-

tures of the Unreal Level Editor, and how to work with the syntax of UnrealScript.

In his documentary film, Bowling for Columbine (2002), Michael Moore recounted a story

of visiting a missile factory near Columbine High School. Columbine High School is

located here in Colorado, where both of the authors of this book were born and live. A few

years ago two students entered the high school and injured or murdered others and then

killed themselves. Michael Moore reported that he found people in the nearby missile fac-

tory unable to view as relevant any connection at all between the acts committed at the

high school and the missiles being produced in the factory.

Missiles definitely kill people. Computer games have not been shown in any definitive fash-

ion to kill people or even lead people to do violent things, but it remains that the problem

might not be so much the depiction of vicarious violence as it is indifference to violence.

Introduction xv

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That Epic provides a stripped down version of the game constitutes a particularly forceful

and positive message. It is a statement about self-consciousness that might be said to be

missing in a huge number of places. Thank you, Epic, Atari, and others for this statement.

As mentioned previously, despite the option of going to the stripped down version, this

book invites you to purchase Unreal Tournament 2004 and to work with programming

examples that do not necessarily lead you directly into the game.

The Chapters

Chapter 1 provides you with an overview of some of the key activities you might think

about attending to as you work with the book. These notions might not make much sense

if you are new to Unreal Tournament programming, but if you are aware of them from the

start, they should make sense soon enough and allow you to derive greater enjoyment as

you learn.

Chapter 2 is likely to prove a little irritating if you already have experience with the Unreal

Level Editor. It helps you acquaint yourself with the level editor. It asks you to experiment

with moving around in the viewports and working with the mouse. The exercises are based

on classroom experiences one of the authors has had getting people started with the some-

what complex activity of negotiating navigation in the world space of the viewports.

In Chapter 3, you begin learning about the code editor (or script editor), the

Actor

class

hierarchy, and the basic syntax of UnrealScript. You create a class derived from the

Trigger

class. You use a level from the game.

Chapter 4 involves creating a level for yourself and then performing more programming

to develop another version of a

Trigger

class to place in the level. You are introduced to the

notion of a class hierarchy, object-oriented programming, and the use of the

extends

key-

word in relation to inheritance.

Chapter 5 marks the beginning of a sustained study of the syntax of UnrealScript. In this

chapter, the discussion centers on data types and operators.

Chapter 6 furnishes discussions developing functions and systems of classes. You learn

about things like scope and the arguments and return values of functions. You learn about

how classes can be characterized as states and behaviors. You develop a system of classes

that allows you to dynamically spawn an instance of one class within another and in this

way explore the idea of peer classes and class composition.

Chapter 7 offers the first of two chapters that allow you to explore control statements. This

chapter concentrates on sequence and selection. It also introduces you to notions con-

cerning abstract classes and functions, function overriding, and the use of such keywords

super

. You also explore the use of static arrays, structures, and enumerations.

Introductionxvi

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Chapter 8 ventures into the world of refactoring. In this case, you develop a very long class

and then break it into three classes that you then use on a composition basis in addition

to investigating the use of repetition controls and dynamic arrays.

Chapter 9 provides you occasions for working with classes you derive from the

KActor

Light

and

Trigger

classes. You also work with functions of the

Vector

data type and control the

movement of a static mesh you equip with physics properties.

Chapter 10 finishes off your work by having you work with a

TriggerLight

object and an

iterator. You also work with such classes as

KHinge

and

KActor

to implement some special

effects and in the end add some music.

Appendix A includes notes on how to deal with a few activities in the Unreal Level Editor

that can help you expand your work to include such activities as using ConTEXT and other

editors to develop. You need to go to other books or the Internet for information on exter-

nal editors. Generally, in this appendix, however, the discussion centers on what you do

using the Unreal Level Editor alone.

Appendix B covers how to restore packages.

The CD and Source Materials

On the CD you find all the projects for the book. The material on the CD is also provided

on an Internet site. To obtain the code from the publisher’s website, access

www.courseptr.com/downloads and enter the title of the book.

While you can load the levels and packages and work from there, it is suggested that at

most you just use the *.txt files to access code that you might find difficult to correctly type

for yourself. Build the levels and packages as you go.

When you access a given chapter folder, you find all the material used in that chapter. This

can include the following:

■

Text versions of the source code (*.txt) files. You find the code in two forms. In

the text, all code is identified as residing in *.txt files that you can open with

Notepad. It is suggested that you access these files only with Notepad. This way you

do not introduce font types that corrupt them. When you open them, notice that

they are all set to Courier 12 pt. This ensures that you can copy and paste them

into the Unreal Level Editor code window.

■

UnrealScript (*.uc) files. These files are files that have been exported from the

packages you work with. They are the same as the *.txt files. In fact, to make them

into *.txt files, all you have to do is change the extension. The same applies to con-

verting *.txt files to *.uc files. Generally, these files are for reference only. If you

want to know more about what to do with them, see Appendix A.

Introduction xvii

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