Learning iOS game programming: a hands-on guide to building your first iphone game

446 Pages·5.859 MB·English

by  Daley, Michael

Praise for
Learning iOS Game Programming
“An excellent introduction into the world of game development explaining every aspect
of game design and implementation for the iPad,iPhone,and iPod touch devices.
A great way for anyone interested in writing games to get started.”
—Tom Bradley,Software Architect,Designer of TBXML
“A great developer and a great game.That’s everything you can find in this book to
learn how to write an awesome game for iPhone.Maybe you’re the next AppStore hit!”
—Sebastien Cardoso
“With Learning iOS Game Programming,you’ll be writing your own games in no time.
The code included is well explained and will save you hours of looking up obscure stuff
in the documentation and online forums.”
—Pablo Gomez Basanta,Founder,Shifting Mind
“I always thought that to teach others one has to be an expert and a person with an
established reputation in the field.Michael Daley proved me wrong.He is teaching oth-
ers while studying himself.Michael’s passion in teaching and studying,ease of solutions
to problems,and a complete game as a resulting project makes this book one of the best
I have ever read.”
—Eugene Snyetilov
“If you’re interested in 2D game programming with the iOS using OpenGL and OpenAL
directly,this book walks you through creating a complete and fun game without getting
bogged down in technical details.”
—Scott D.Yelich
“Michael Daley brings clarity to the haze of iPhone application development.Concrete
examples,thorough explanation,and timesaving tips make this book a must have for the
up and coming iPhone game developer.”
—Brandon Middleton,Creator of Tic Tac Toe Ten
“This is the A-Z guide to iOS game development;Michael’s book takes you from the
basics and terminology to using the techniques in practice on a fully working game.
Before you know it,you will find yourself writing your own game,fueled by a firm
grasp of the principles and techniques learned within.I could not ask for a better refer-
ence in developing our own games.”
—Rod Strougo,Founder Prop Group
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Learning iOS
Game
Programming
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Learning iOS
Game
Programming
Michael Daley
Upper Saddle River, NJ •Boston•Indianapolis•San Francisco
New York •Toronto •Montreal•London•Munich•Paris •Madrid
Cape Town •Sydney •Tokyo •Singapore•Mexico City
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er was aware of a trademark claim,the designations have been printed with initial capital Chuck Toporek
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The author and publisher have taken care in the preparation of this book,but make no
Editor
expressed or implied warranty of any kind and assume no responsibility for errors or omis-
Chris Zahn
sions. No liability is assumed for incidental or consequential damages in connection with or
arising out of the use of the information or programs contained herein. Managing Editor
Kristy Hart
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Copyright © 2011 Pearson Education,Inc. Romny French
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ISBN-13: 978-0-321-69942-8
ISBN-10: 0-321-69942-4
Text printed in the United States on recycled paper at R.R. Donnelley in Crawfordsville,
Indiana.
First printing September 2010
❖
Dedicated to my mum,Jen
❖
Contents at a Glance
Preface xxi
1 Game Design 1
2 The Three Ts: Terminology,Technology,
and Tools 13
3 The Journey Begins 39
4 The Game Loop 73
5 Image Rendering 97
6 Sprite Sheets 137
7 Animation 153
8 Bitmap Fonts 165
9 Tile Maps 183
10 The Particle Emitter 223
11 Sound 249
12 User Input 285
13 The Game Interface 299
14 Game Objects and Entities 325
15 Collision Detection 357
16 Putting It All Together 369
Index 395
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi
1 Game Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
The Game That Started It All (For Me) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
So,What’s the Big Idea? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
A Game That Fits withthe iPhone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
The Storyline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
What’s in a Name? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
The Game’s Objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Game Play Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Lives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Health . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Weapons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Entities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2 The Three Ts: Terminology,Technology,and Tools . . . . . . . . . . . . . . . . . . 13
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Sprite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Sprite Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Animation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Bitmap Fonts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Tile Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Particle System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Collision Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Artificial Intelligence (AI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Game Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Objective-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Cocoa Touch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
OpenGL ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
OpenAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30