Unity 4.x 游戏人工智能编程实战

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Unity

Game

Programming

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"Unity 4.x Game AI Programming" 是一本关于使用Unity 3D进行游戏人工智能编程的专业指南。这本书由Aung Sithu Kyaw、Clifford Peters和Thet Naing Swe合著，旨在帮助读者学习并实践在Unity 4.x版本的游戏开发中集成高级AI技术。书中提供了大量的实例项目，涵盖了从基础概念到下一代AI技术的深入讲解，让开发者能够将这些技术应用到自己的Unity 3D项目中。作者们确保了书中信息的准确性，但须注意，书中的内容并非无条件提供，所有版权受保护，未经Packt Publishing事先书面许可，不得以任何形式复制、存储或传输。此外，尽管出版方尽力确保信息的可靠性，但书中的内容是按现状销售，不提供任何形式的保证，包括明示或暗示的保修。关于商标信息，尽管Packt Publishing已尽可能正确地标注了书中提及的所有公司和产品的商标，但并不保证其完整性或准确性。通过阅读这本书，读者将能掌握以下关键知识点： 1. Unity 4.x API与AI框架：了解Unity 4.x版本中内置的AI工具，如NavMesh、Behaviors和ScriptableObjects，以及如何利用它们创建角色的行为和决策系统。 2. 路径finding算法：学习如何实现A*算法、宽度优先搜索（BFS）和深度优先搜索（DFS）等基本路径规划方法，以及如何优化它们以适应游戏场景的需求。 3. 行为树（Behavior Trees）：掌握行为树的设计和实现，这是一种强大的组织AI逻辑的方式，可以模拟复杂的行为序列和条件判断。 4. 机器学习：了解如何在Unity中引入简单机器学习，如决策树、状态机或基本的强化学习，用于训练游戏角色的自主行为。 5. 群体智能：学会如何设计和管理游戏中的非玩家角色（NPCs）群组，通过协同行为实现逼真的互动。 6. AI调试与测试：理解如何有效地调试和优化AI代码，以及如何设计测试用例以确保AI系统的稳定性和真实性。 7. 项目实战：通过书中提供的实例项目，实践所学的AI技术，包括创建角色、环境互动、敌对行为和任务执行等方面。 8. 最佳实践和未来趋势：了解到当前和未来可能影响游戏AI的最新技术动态，以及如何保持学习和适应变化的能力。 "Unity 4.x Game AI Programming"是一本实用的教程，对于希望提升Unity 3D游戏中人工智能效果的开发者来说，无论是初学者还是经验丰富的专业人士，都将从中获益匪浅。

Preface

This book is meant to help you to incorporate various Articial Intelligence

techniques into your games. We will discuss decision techniques such as Finite State

Machines and Behavior Trees. We will also look at movement, obstacle avoidance,

and ocking. We also show how to follow a path, how to create a path using the

A* pathnding algorithm, and then how to reach a destination using a navigation

mesh. As a bonus we will go into detail about random and probability, and then

incorporate these ideas into a nal project.

What this book covers

Chapter 1, Introduction to AI, talks about what Articial Intelligence is, and how it is used

in games. Also, we talk about various techniques used to implement AI into games.

Chapter 2, Finite State Machines, discusses a way of simplifying how we manage the

decisions, which AI needs to make. We use FSMs to determine how AI behaves in a

particular state and how it transitions to other states.

Chapter 3, Random and Probability, discusses the basics behind probability, and how

to change the probability of a particular outcome. Then we look at how to add

randomness to our game to make the AI less predictable.

Chapter 4, Implementing Sensors, looks at where we should make our character aware

of the world around them. With the ability of our characters to see and hear, they

will know when an enemy is nearby and will know when to attack.

Chapter 5, Flocking, discusses a situation where many objects travel together as a

group. We will look at two different ways to implement ocking, and how it can be

used to make objects move together.

Chapter 6, Path Following and Steering Behaviors, looks at how AI characters can follow

a path provided to reach a destination. Then we look at how AI characters can nd a

target without knowing a path, and by moving towards a goal while avoiding.

Preface

[ 2 ]

Chapter 7, A* Pathnding, discusses a popular algorithm, which is used to nd the

best route from a given location to a target location. With A*, we scan the terrain and

nd the best path that leads us to the goal.

Chapter 8, Navigation Mesh, discusses using the power of Unity to make pathnding

easier to implement. By creating a Navigation Mesh (this requires Unity Pro), we

will be able to represent the scene around us better then we could using tiles and

the A* algorithm.

Chapter 9, Behavior Trees, expands upon Finite State Machines into something we can

use for even the most complex of games. We will be using the free plugin Behave to

help us create and manage Behavior Trees in Unity.

Chapter 10, Putting It All Together, takes various elements of what we have learned

throughout the book and putting together one last project. From here you will be

able to apply the remaining AI elements we learned and create an impressive vehicle

battle game.

What you need for this book

The main requirement for this book is having Unity Version 3.5 or higher installed.

Chapter 8, Navigation Mesh talks about creating a Navigation Mesh, something

that requires Unity Pro. In Chapter 9, Behavior Trees we download Behave, a free

Behavior Tree plugin, which requires an account with the Unity Store. Both of these

requirements are optional because the assets that come with this book already have

the Navigation Mesh generated and the Behave plugin.

Who this book is for

This book is for anyone who wants to learn about incorporating AI into games. This

book is intended for users with prior experience of using Unity. We will be coding in

C#, so some familiarity with this language is expected.

Conventions

In this book, you will nd a number of styles of text that distinguish between

different kinds of information. Here are some examples of these styles, and an

explanation of their meaning.

Code words in text are shown as follows: "The

AdvanceFSM class basically manages

all the

FSMState(s) implemented, and keeps updated with the transitions and the

current state."

Preface

[ 4 ]

Downloading the example code

You can download the example code les for all Packt books you have purchased

from your account at http://www.packtpub.com. If you purchased this book

elsewhere, you can visit http://www.packtpub.com/support and register to

have the les e-mailed directly to you.

Downloading the color images of this book

We also provide you a PDF le that has color images of the screenshots/diagrams

used in this book. The color images will help you better understand the changes in

the output.You can download this le from: http://www.packtpub.com/sites/

default/files/downloads/3400OT_ColoredImages.pdf

Errata

Although we have taken every care to ensure the accuracy of our content, mistakes do

happen. If you nd a mistake in one of our books—maybe a mistake in the text or the

code—we would be grateful if you would report this to us. By doing so, you can save

other readers from frustration and help us improve subsequent versions of this book.

If you nd any errata, please report them by visiting http://www.packtpub.com/

submit-errata

, selecting your book, clicking on the errata submission form link,

and entering the details of your errata. Once your errata are veried, your submission

will be accepted and the errata will be uploaded on our website, or added to any list

of existing errata, under the Errata section of that title. Any existing errata can be

viewed by selecting your title from http://www.packtpub.com/support.

Piracy

Piracy of copyright material on the Internet is an ongoing problem across all media.

At Packt, we take the protection of our copyright and licenses very seriously. If you

come across any illegal copies of our works, in any form, on the Internet, please

provide us with the location address or website name immediately so that we can

pursue a remedy.

Please contact us at

[email protected] with a link to the suspected

pirated material.

We appreciate your help in protecting our authors, and our ability to bring you

valuable content.

Questions

You can contact us at [email protected] if you are having a problem with

any aspect of the book, and we will do our best to address it.

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