a0002 beginning xna 3 0 game programming from novice to professiona morebook vn 9514

Beginning XNA 3.0
Game Programming
From Novice to Professional

■■■

Alexandre Santos Lobão,
Bruno Evangelista,
José Antonio Leal de Farias,
and Riemer Grootjans


Beginning XNA 3.0 Game Programming: From Novice to Professional
Copyright © 2009 by Alexandre Santos Lobão, Bruno Evangelista, José Antonio Leal de Farias,
Riemer Grootjans
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Contents at a Glance
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
About the Authors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
About the Technical Reviewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi

■CHAPTER 1

Game Planning and Programming Basics . . . . . . . . . . . . . . . . . . . . . . 1

■CHAPTER 2

2D Graphics, Audio, and Input Basics . . . . . . . . . . . . . . . . . . . . . . . . . 15

■CHAPTER 3

Creating Your First 2D Game . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

■CHAPTER 4

Improving Your First 2D Game . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

■CHAPTER 5

Basics of Game Networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

■CHAPTER 6

Rock Rain Live! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

■CHAPTER 7

Rock Rain Zune . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

■CHAPTER 8

3D Game Programming Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

■CHAPTER 9

Rendering Pipeline, Shaders, and Effects . . . . . . . . . . . . . . . . . . . . 227

■CHAPTER 10

Lights, Camera, Transformations! . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

■CHAPTER 11

Generating a Terrain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261

■CHAPTER 12

Skeletal Animation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

■CHAPTER 13

Creating a Third-Person Shooter Game . . . . . . . . . . . . . . . . . . . . . . 337

■CHAPTER 14

Closing Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395

■INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399

iii

Contents
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
About the Authors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
About the Technical Reviewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi

■CHAPTER 1

Game Planning and Programming Basics . . . . . . . . . . . . . . . . . 1
Planning the Game . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Target Market . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Game Genre. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
The Game Team . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Game Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
XNA Game Programming Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
General Game Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Game Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Game Finalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Game Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

■CHAPTER 2

2D Graphics, Audio, and Input Basics

. . . . . . . . . . . . . . . . . . . . 15

2D Graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Common Gaming Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2D and Screen Coordinate Systems . . . . . . . . . . . . . . . . . . . . . . . . . 16
Drawing a Sprite Using XNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Moving the Sprite on the Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Coding for Collision Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Game Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Using the Xbox 360 Gamepad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Using the Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Using the Mouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Game Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Creating Audio Content with XACT . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Using Audio in Games . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

v


■I N D E X

user input

vertices

keyboard, 31

3-D games, 201–205

mouse, 31

coding for 3-D axis, 211–215

overview of, 29

mesh, 266, 324–325

Xbox 360 gamepad, 30–31

moving triangle up Y axis and, 206

using statement, creating object in, 8

normalizing weights of, 325

■V

representing as matrices, 207

varying input data, 231

terrains
generating position and texture
coordinate, 269–272

Vector2 class, 18
Vector3 class

normal vector, 272–273

Cross method, 243, 245

Lerp method, 249
Vector3 data type
methods of, 205
shortcuts of, 206
vertices and, 201
vectors

tangent and binormal vectors, 273–275
vibration effect, adding to Rock Rain, 56–57
view matrix, 209, 243–244
viewport, aspect ratio and, 209
Visual C# Express Edition, downloading, 5

■W

3-D games, 205–206

walking character, animating, 299

camera coordinate system, 244–246

Wander method (Enemy class), 376–377

velocity property (clsSprite class), 24–25

Wandering state (Enemy class), 375–376

vertex buffer, coding for 3-D axis, 211–215

wave bank operations (XACT), 33

vertex grid, 6x6, created over x,z plane, 261

WaveBank object, 36

vertex processing

web sites

AnimatedModel class, 331–333

Apress, 396

for normal mapping, 290

Augusto, Carlos, 366

vertex shaders

Entertainment Software Association, 2

See also techniques

image editors, 19

description of, 228

Microsoft Developer Network

semantics, 231

for terrain effect, 280–281

Platformer Starter Kit example, 16
Psionic, 372

vertex structures, predefined, 266

recommended, 396–397

VertexBuffer for terrain mesh, 267

Sharp Games community sites, 396

VertexPositionNormalTangentBinormalText
ure, defining, 266–267

SpriteLIB GPL, 43
Xbox LIVE Community Games, 126
XNA Creators Club, 5, 397

421


422

■I N D E X

weights of vertex, normalizing, 325

XNA Game Studio, downloading, 5

window size, changing, 23
world matrix, 209

XNA Game Studio Device Center with Zune
added, 196

World property (BasicEffect class), 222

■Z

world transformation, 258

Zune platform

writing custom user data
(AnimatedModelProcessor class),
316–318

deploying game on, 196–198

■X

modifying classes for Rock Rain
version for

X (DirectX File) format, 301

menu changes for Rock Rain version
for, 187

XACT (Microsoft Cross-Platform Audio
Creation Tool), 32–34

ActionScene class, 195–196

Xbox 360

HelpScene class, 186–187

Game1 class, 193–195

gamepad, user input from, 30–31

Meteor class, 188–190

modifying and deploying Rock Rain to,
57–59

MeteorsManager class, 192

skeletal animation and, 307

PowerSource class, 187–188

Xbox LIVE (Microsoft)

Player class, 190–192
StartScene class, 192–193

Community Games, 126

organizing Rock Rain version for, 184–185

profile, creating, 127–131

planning Rock Rain version for, 183–184

XNA 3.0 Game Programming Recipes
(Grootjans), 396
XNA Creators Club
Billboards sample, 16
web site, 5, 397