Flash 10多玩家游戏开发实战指南

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"Flash多玩家游戏开发指南深入解析" 随着Adobe Flash Player的普及，Flash多人游戏开发成为了一个极具吸引力的领域，特别是在早期的互联网娱乐时代。《Flash10 Multiplayer Game Essentials》是一本专为开发者打造的教程，由Prashanth Hirematada撰写，旨在帮助读者创建引人入胜的实时多人互动游戏。该书针对Flash 10版本，充分利用了其强大的网络通信功能，如ActionScript 3.0的Socket API和Security模型，以支持跨平台的多人游戏体验。书中内容涵盖了从基础到进阶的主题，包括但不限于以下几点： 1. 入门基础知识：介绍了Flash多玩家游戏开发的基本概念和原理，让读者对实时网络通信、用户认证、同步数据传输等核心要素有深刻理解。 2. 网络编程：详细讲解如何在Flash中创建TCP/IP连接，管理套接字，处理客户端与服务器之间的数据交互，以及错误处理和数据包解析。 3. 安全性考虑：强调了在多人游戏中保障用户隐私和防止作弊的重要性，讨论了如何实现安全措施，如加密通信和访问控制。 4. 实时协作与同步：探讨了如何实现实时同步，比如在游戏中保持角色位置、动作和状态的一致性，确保所有玩家的游戏体验流畅无延迟。 5. 用户体验设计：提供了如何设计吸引人的用户界面和交互机制，包括图形界面、动画效果和用户输入处理，以增强游戏的沉浸感。 6. 案例分析与项目实战：通过实际项目演示，让读者了解如何将理论知识应用到实际开发中，包括创建一个小型的多人竞技游戏或合作游戏。 7. 最佳实践与性能优化：讨论了如何避免常见问题，如内存泄漏、网络延迟和带宽管理，以提升游戏的稳定性和效率。 8. 版权与法律注意事项：提醒读者尊重版权，确保在开发过程中遵守相关法律法规，避免潜在的法律风险。《Flash10 Multiplayer Game Essentials》不仅是一本技术指南，也是一部实用的参考手册，适合希望进入或者深化Flash多人游戏开发领域的开发人员，无论是经验丰富的老手还是初出茅庐的新手都能从中获益匪浅。通过阅读这本书，读者可以建立起坚实的Flash网络编程基础，并掌握创建高质量在线游戏的关键技巧。

Preface

There are plenty of Flash games on the web, but what about multiplayer Flash games

and moreover real-time multiplayer games? Not that many!

The Pulse SDK presented in this book abstracts the standard set of features required

for any multiplayer game, which is leveraged throughout the book. As you will

see, writing multiplayer becomes quite straightforward with all the standard set of

features such as room and lobby management, friends, top ten, registration, among

others, all taken care of, allowing the developer to focus only on the game.

What this book covers

The reason that one does not see that many real-time multiplayer games is due to

the fact that development and deployment requires a great deal of knowledge about

networking and server programming. The developer must also be well aware of

the performance bottlenecks along the way when the game is played by several

thousands of players at the same time. There is also the issue of dealing with the

database in order to save the scores, achievements, friends, and other attributes

of a player.

All of these present a high barrier for the developer attempting to write a

multiplayer game.

This book presents all the features required for any multiplayer game, their design

and implementation. All of the implementation presented in this book is based

on the Pulse SDK framework.

Preface

[ 2 ]

Chapter 1, Getting Started, sets up all the required software, namely, Flash Builder

4 and Pulse SDK. We will also re up the game server and test drive a few

multiplayer game samples. The server and the client may be run all on one machine

and on separate physical machines. We will go through the high-level design and

architecture of a game server and its modules that must be implemented in order to

support any typical multiplayer game. We will also see an enterprise architecture

that is capable of serving thousands of concurrent players.

We will also touch upon the communication paradigms between game clients,

namely peer-to-peer and the client-server architectures. The book follows the

client server exclusively.

Throughout the book, we will work at a higher level of abstraction in developing

our games. To make things even simpler, we will use a paradigm and a set of APIs

provided by Pulse SDK that does not require us to write a single line of code on the

server and yet we will implement, turn-based and non turn-based games, puzzle

games as well as fast action racing games.

Chapter 2, Game Interface Design, mainly deals with the game UI required by a typical

multiplayer game. The UI is leveraged by the Pulse UI framework bundled along

with Pulse SDK. From Login screen, lobby screen for creating a new game room,

game screen itself. The UI also involves friends display, players display within the

game room, chat, and more. The chapter is presented with the Hello World sample

in the backdrop. The complete source code for Hello World sample comes with

the Pulse package, so you can modify the sample and experiment as you progress

through the chapter.

Chapter 3, Avatar and Chat, starts to model our game objects starting with avatar

for the game. We will explore what it means to model the game entities. We will

learn how to design the avatar in this chapter. We will explore the different kinds of

objects (entities) that may be modelled within the Pulse Modeller, also the property

types that may be dened within each class (entity). We will also explore the game

UI in greater detail as related to the friends display and player display. We will also

see how we can customize them from the default behaviour as offered by the Pulse

UI framework. You will learn the Pulse APIs that deal with customizing the avatar

for the player, making friends, and chat.

Chapter 4, Lobby and Room Management, discusses the central feature to any

multiplayer games, lobby and room management. You will continue to use the Pulse

Modeller to design the rooms that is required for the game. We will learn about the

different room properties and their status during its existence. We will also see how

players may join, leave, or kick a player out of a room. Again we will leverage the

Pulse API to manage all these features within our game.

Preface

[ 3 ]

Chapter 5, Game Logic, is the heart of the game—the game itself! We will review all

the different Pulse game state APIs that deal with implementing the game logic. We

will learn how we can design the game states required for the game via the Pulse

Modeller and use them through an innovative set of Pulse APIs. We will see how we

can use the unique set of APIs that makes any game logic implementation possible

without writing a single line of server code.

Chapter 6, Multiplayer Game Example: Tic-Tac-Toe, has the complete source for

Tic-Tac-Toe included in the Pulse package; in this chapter, we will do a complete

walk-through of the code. Tic-tac-toe is of course a real-time multiplayer game.

Multiple clients may connect to the server, create a room or join a room, and play the

game. We will go through the different screens such as login screen, lobby, top-ten,

and registration. The game is implemented in completeness, and includes

friend-making and chat.

Chapter 7, Multiplayer Game Example: Jigsaw walks through a non-turn-based game,

a multiplayer jigsaw (unlike tic-tac-toe, which is a turn-based game), where multiple

players collaborate to solve the same jigsaw puzzle. The player matching the most

pieces wins. The chapter will walk you through in detail to rst make the client part

work, leaving the multiplayer implementation to the latter part of the chapter.

The walk-through includes cutting any given picture into jigsaw pieces and then

managing them during game play. We will learn how to detect the correct matching

pieces when they are next to each other. We will also see how all the matched pieces

are kept synchronized among all the players that are currently playing

the game.

Chapter 8, Card-based Racing Game Tutorial: Jump Jump Frog, is a fun card-based racing

game. The chapter will teach you a commonly occurring game implementation,

namely card distribution. Here we make heavy use of unique game state concept

available in Pulse SDK. Similar to other game implementation tutorials in this book,

we will rst start with the design of the schema for the game and then

we will learn the graphics part of the game client and nally explore the

multiplayer implementation.

Chapter 9, Real-time Racing Game Tutorial: AstroRace, teaches to implement the

most exciting game genre, a racing game. We will see what we need to design in

the schema for the game. The exciting game to play has its challenges set for the

developers. In this game, the players will race against one another in a spaceship.

Along the racetrack the players will have avoid items that may work against them

or pickup items that will help them get faster to the nish line.

Preface

[ 4 ]

Appendix A: This part of the book introduces Flash Builder and coding in AS3. It

is a great start for those programmers who are novice AS3 programmers. Here the

basic AS3 syntax is presented in a relatively few number of pages, letting starters get

procient in ash programming in a short amount of time. For those of you getting

into object oriented programming for the rst time, this appendix is a great start.

Appendix B: Having a good handle on the AS3 syntax, this appendix presents the

basics of ash graphics programming. It starts with the basic building block, sprite.

Readers will also learn to draw and move them around on stage. In depth discussions

of essential techniques to any ash game development such as events, timers, event

listeners, mouse and keyboard handling are also presented. Interesting things like

transparency, added cool effects to sprites are also part of this exciting appendix.

Plenty of examples with complete code that will jump start you into your next

game development.

Who this book is for

This book is written for game developers that are either starting out with game

development in Flash or professional game developers wanting to write the

next hot real-time multiplayer game.

If you are starting out new in Flash, you will nd the appendix very useful as

they teach working with Flash Builder 4, learning to program in AS3, and lots of

programming examples required for game programming, including sprite basics,

keyboard and mouse handling, and a lot more.

Professional game developers, who are comfortable writing single player games,

nd it challenging when it comes to multiplayer games, a lot of distracting tasks to

take care of before a line of code for the game is written. Armature multiplayer game

developers would appreciate the challenges that befall when writing their rst game.

The book discusses each of the challenges.

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 two environment variables that all

of Pulse SDK depends on are

GAMANTRA and GNET_JAVA.

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