a0008 xna 3 0 game programming recipe morebook vn 8686

XNA 3.0 Game
Programming Recipes
A Problem-Solution Approach

Riemer Grootjans


XNA 3.0 Game Programming Recipes: A Problem-Solution Approach
Copyright © 2009 by Riemer Grootjans
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
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ISBN-13 (electronic): 978-1-4302-1856-2
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Development Editor: Joohn Choe
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To Elisa, the most lovely woman I know.
Without your love and support, this would not have been possible.
To my parents and brothers, for giving me each and every opportunity.
To my friends and coworkers, for their support and laughs.


Contents at a Glance
About the Author. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiii
About the Technical Reviewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxv
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxvii

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxix

CHAPTER 1

Getting Started with XNA 3.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

CHAPTER 2

Setting Up Different Camera Modes in Your 3D World . . . . . . . . . . . . 29

CHAPTER 3

Working with 2D Images/Textures in XNA 3.0 . . . . . . . . . . . . . . . . . . . 173

CHAPTER 4

Working with Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281

CHAPTER 5

Getting the Most Out of Vertices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393

CHAPTER 6

Adding Light to Your Scene in XNA 3.0 . . . . . . . . . . . . . . . . . . . . . . . . . 521

CHAPTER 7

Adding Sounds to Your XNA 3.0 Project. . . . . . . . . . . . . . . . . . . . . . . . . 583

CHAPTER 8

Networking in XNA 3.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 631

v


648

NINDEX

defining TypeWriter capable of serializing object of MapData class, 463
overview, 460–462
overview, 393–394
redundant, removing using indices,
413–417
rendering multiple lines, 401
rendering multiple points, 401
rendering multiple triangles
using TriangleFan, 402
using TriangleList, 399–400
using TriangleStrip, 400–401
rendering triangle to screen, 397–399
sharing normals between, 528–532
storing in DynamicVertexBuffer, 423–425
storing in memory of graphics card,
417–422
IndexBuffer, 421–422

overview, 417–420
VertexBuffer, 420
in VertexBuffer, automatically calculating
normals for, 429–435
GenerateNormalsForTriangleList
Method, 431–432
making method fail-safe, 434
overview, 429–430
starting from VertexBuffer and IndexBuffer, 434–435
for structure rendered as TriangleList,
432–433
for structure rendered as TriangleStrip,
433–434
of triangle, 431
writing custom content importer
calculating collision point between
pointer and terrain, 166
Intermediate class, 168
overview, 166
receiving data in content processor,
169–170
vertices array, 418, 433, 435
view frustum, 30, 32, 37
View matrix, 17, 20, 30, 34, 47, 52, 55, 395
viewAngle variable, 576
viewMatrix node, 98
viewMatrix variable, 45–46
ViewProjection matrix, 244, 275, 565
Visual Studio 2008, installing, 2

W
WakeUp method, 199
walls, collision with, 66
.wav files
playing and controlling, 583–585
through XAct, 586–590

WaveBank method, 589
waves, 587
while loop, 101, 394, 402, 439, 440, 444, 455,
457, 459–460, 468–469, 502
WMV audio files, playing, 585–586
world matrices
ensuring correct lighting when using,
541–542
objects in sight of camera, 60–63
setting different world matrices for different objects, 286–293
combining multiple transformations,
288
order of matrix multiplication, 288–292
overview, 286–288
updating, 99–101
worldMatrix node, 97
worldMatrix property, 93
worldMatrix variable, 92
WorldViewProjection matrix, 272
Wrap method, 410
Wrapping mode, 410
Write method 353, 362, 614
WriteBone method, 314–316

WriteModelMesh method, 314–316
WriteModelStructure method, 314–316

X
.x file, 282
XAct, 586
xAllowedRotDir variable, 244
xAmbient variable, 542
.xap file, 588
xBlurSize variable, 158–159
Xbox 360 console, 6
Xbox 360, deploying games on, 5–8
connecting Xbox 360 and PCs, 6
Creators Club licenses, 6
generating projects from existing XNA 2.0
projects, 7–8
installing XNA Game Studio Connect, 6
overview, 5–6
pairing PCs and Xbox 360, 7
Xbox Live accounts, 6
Xbox Live accounts, setting up, 6
Xbox Live Marketplace, 5
xCamUp parameter, 248
xCamUp variable, 247
xConeAngle variable, 552
xConeDecay variable, 553
xConeDirection variable, 552
.xgs binary file, 588
XImporter method, 215–216
xLightDirection parameter, 546

xLightStrength value, 557


NI N D E X

xLightStrength variable, 556
xMirrorTexture variable, 271–275, 278–279
.xml file, 461
XML file, loading data from, 460–465
creating XNA-compatible XML file from
existing object, 464–465
defining custom MapData class, 462
defining TypeReader capable of serializing
object of MapData class, 463
defining TypeWriter capable of serializing
object of MapData class, 463
overview, 460–462
XmlSerializer class, 23, 27
XNA, 491–492, 503–504
XNA 2.0 Framework files, installing, 10
XNA code, Skybox, 84–86
XNA Framework Redistributable 2.0, 10
XNA Game Studio 3.0, 28
deploying games
on PCs, 10
on Xbox 360, 5–8
on Zune, 8–9
.fx HLSL files, 5
game loop timing, 12–14
Draw method frequency, 14

IsRunningSlowly variable, 13
overview, 12
Update method frequency, 13
GameComponent class, 14–23
changing updating order of, 22–23
DrawableGameComponent class, 15–16
making subscribe to interfaces, 20
overview, 14–20
subscribing to ICameraInterface
service, 20–21
using GameComponent class, 17–18
using multiple, 21–22
installing, 1–2
overview, 1
predefined methods, 3–4
Draw method, 4–13
Game1 constructor, 4

Initialize method, 4
LoadContent method, 4
overview, 3
UnloadContent method, 4
Update method, 4
saving/loading data, 23–28
creating StorageDevice method
asynchronously, 24–25
loading data from disks, 27–28
overview, 23–24
saving data to disks, 26–27
starting, 3

starting new projects, 3
XNA Game Studio Connect program, 6–8
XNA Game Studio Device Center 7, 9
XNA project, accessing data in, 363–364
XNA-compatible XML file, creating from
existing object, 464–465
<XNAContent> tag, 460
XNA-to-HLSL variables, 478, 487–488,
495–496
XNAUtils class, 102
XNAUtils file, 301
xnb binary file, 214–215
xnb file, 215–216, 224
xPreviousShadingMapContents variable, 578
xRelative value, 450
xTexStretch variable, 487
xTexture variable, 335, 577
xTime variable, 151, 257–258, 260, 498
xWaveHeights variable, 495, 497, 499,
504–505
xWaveLengths variable, 495, 497, 499,
504–505
xWaveSpeeds variable, 497

Z
z-buffer (or depth buffer), 36–37, 78, 263
zRelative value, 450
Zune, deploying games on, 8–9

649