Beginning OpenGL Game Programming

337 Pages·2004·6.116 MB·English

by  Dave Astle, Kevin Hawkins

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For my family and friends
—Kevin
For my crash of rhinos
—Dave
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Acknowledgments
F
irst and foremost,I want to thank my wife Melissa and my kids,Rebi,Evan,Ellie,
Tyler,and Nate,for all of your support throughout this project,and for dragging
me away from the computer just often enough for me to retain most ofmy sanity.
I love you all.
I’d also like to thank Kevin, my partner and collaborator, without whom I never would
have done this.I can’t imagine finding a better teammate.
Big thanks to everyone at Premier Press/Course Technology.You’re a great group of peo-
ple to work with,and I genuinely appreciate the confidence you place in me.
Ben Woodhouse deserves special mention for his efforts as technical editor.He provided
valuable feedback that helped make this book much better than it would have been oth-
erwise.Thanks also to The Mighty Pete for allowing us to use his skybox images in many
of the example programs,and to Jeff Royle from ATI Technologies for providing us with
graphics hardware for testing purposes.
Finally, I want to thank everyone who has taught me in some way, including Chuck
Hansen,Robert Kessler and my other professors at the University of Utah,my coworkers
at Avalanche Software and Qualcomm, the denizens of the GameDev.net forums, and
everyone else who has taken the time to share their knowledge and experience via a Web
site or book.
—Dave Astle
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Acknowledgments vii
I’d like to thank Dave,for his work as a good teammate,motivator,and friend.Chances
are you would not be holding this book in your hands if he had not used a little friendly
coercion on me.I’m amazed at what we were able to accomplish with this project,and a
good deal of its success is due to our ability to work together as a team. I also want to
thank my family for their constant support for me in everything I do. Oftentimes they
don’t get as much credit as they should be getting.
Myfriends and coworkers also deserve a share ofthe thanks.Whether they know it or not,
I’ve learned from all ofthem in some form or another and value their friendships:Tucker,
Tom, Christie, Mike, Rael, Kristin,Vivian, JP,Andy, Greg R., Greg S., Bill, Kyle, Randall,
Jordan,Hack,Justin,Nate,Luke M.,Mike M.,Johnny Y.,Nick M.,and so many others that
wedon’t have the space for here.Also,thank you to the Premier Press group for the oppor-
tunity to do this project and for maintaining a high degree of support and confidence in
both Dave and me,and in GameDev.net.
And finally, I want to thank everyone who has provided me with the ability and talent,
directly or indirectly,that has allowed me to create this book,including the professors at
Embry-Riddle,my baseball coaches and teammates,Chris Hargrove,Seth Robinson,Jeff
Molofee,Rich Benson,and a host of software engineering colleagues.
—Kevin Hawkins
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About the Authors
DAVE ASTLE has been programming games professionally for several years, working on
titles for the Xbox,PlayStation 2,GameCube,PC,and various wireless devices.Currently,
he is a lead engineer in the Gaming and Graphics group at Qualcomm, Inc. He is the
cofounder and executive producer of GameDev.net, the leading online community for
game developers.He has authored or contributed to several game development books and
has spoken at industry conferences, including the Game Developers’ Conference. He
received his bachelor’s degree in Computer Science from the University ofUtah,where he
specialized in graphics,artificial intelligence,networking,software engineering,and com-
piler theory and design.
KEVINHAWKINSis a lead software engineer at Raydon Corporation where he designs and
develops training simulations for a variety of customers, including the U.S. military. In
addition,Kevin is the cofounder and CEO of GameDev.net,the leading online commu-
nity for game developers.He holds a master’s degree in Software Engineering and a bach-
elor’s degree in Computer Science from Embry-Riddle University, where he also played
intercollegiate baseball and was drafted by the Cleveland Indians in the 2002 amateur
baseball draft.
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Contents at a Glance
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvii
Part I OpenGL Basics . . . . . . . . . . . . . . . . . . . . . . . .1
Chapter 1 The Exploration Begins . . . Again . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chapter 2 Creating a Simple OpenGL Application . . . . . . . . . . . . . . . . . . . . .13
Chapter 3 OpenGL States and Primitives . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Chapter 4 Transformations and Matrices . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Chapter 5 Colors, Lighting, Blending, and Fog . . . . . . . . . . . . . . . . . . . . . . .99
Chapter 6 Bitmaps and Images with OpenGL . . . . . . . . . . . . . . . . . . . . . . .133
Chapter 7 Texture Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149
Part II Beyond the Basics . . . . . . . . . . . . . . . . . . .183
Chapter 8 OpenGL Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185
Chapter 9 More on Texture Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197
Chapter 10 Up Your Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221
Chapter 11 Displaying Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .249
Chapter 12 OpenGL Buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261
Chapter 13 The Endgame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .277
Part III Appendices . . . . . . . . . . . . . . . . . . . . . . . . .283
Appendix A Answers to Review Questions and Exercises . . . . . . . . . . . . . . . .285
Appendix B Further Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295
Appendix C What’s on the CD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .299
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301 ix
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