OpenGL SuperBible: Comprehensive Tutorial and Reference (4th Edition)

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9780321498823: OpenGL SuperBible: Comprehensive Tutorial and Reference (4th Edition)

OpenGL ® SuperBible, Fourth Edition , begins by illuminating the core techniques of “classic” OpenGL graphics programming, from drawing in space to geometric transformations, from lighting to texture mapping. The authors cover newer OpenGL capabilities, including OpenGL 2.1’s powerful programmable pipeline, vertex and fragment shaders, and advanced buffers. They also present thorough, up-to-date introductions to OpenGL implementations on multiple platforms, including Windows, Mac OS X, GNU/Linux, UNIX, and embedded systems.


Coverage includes


·         An entirely new chapter on OpenGL ES programming for handhelds

·         Completely rewritten chapters on OpenGL for Mac OS X and GNU/Linux

·         Up-to-the-minute coverage of OpenGL on Windows Vista

·         New material on floating-point color buffers and off-screen rendering

·         In-depth introductions to 3D modeling and object composition

·         Expert techniques for utilizing OpenGL’s programmable shading language

·         Thorough coverage of curves, surfaces, interactive graphics, textures, shadows, and much more

·         A fully updated API reference, and an all-new section of full-color images


You’ll rely on this book constantly–whether you’re learning OpenGL for the first time, deepening your graphics programming expertise, upgrading from older versions of OpenGL, or porting applications from other environments.


Now part of the OpenGL Technical Library–The official knowledge resource for OpenGL developers

The OpenGL Technical Library provides tutorial and reference books for OpenGL. The Library enables programmers to gain a practical understanding of OpenGL and shows them how to unlock its full potential. Originally developed by SGI, the Library continues to evolve under the auspices of the OpenGL Architecture Review Board (ARB) Steering Group (now part of the Khronos Group), an industry consortium responsible for guiding the evolution of OpenGL and related technologies.



Preface  xxvii

About the Authors  xxxv

Introduction  1


Part I: The Old Testament

Chapter 1     Introduction to 3D Graphics and OpenGL  9

Chapter 2     Using OpenGL  33

Chapter 3     Drawing in Space: Geometric Primitives and Buffers  73

Chapter 4     Geometric Transformations: The Pipeline  127

Chapter 5     Color, Materials, and Lighting: The Basics 173

Chapter 6     More on Colors and Materials  229

Chapter 7     Imaging with OpenGL  251

Chapter 8     Texture Mapping: The Basics  303

Chapter 9     Texture Mapping: Beyond the Basics  341

Chapter 10   Curves and Surfaces  377

Chapter 11   It’s All About the Pipeline: Faster Geometry Throughput  421

Chapter 12   Interactive Graphics  457

Chapter 13   Occlusion Queries: Why Do More Work Than You Need To? 481

Chapter 14   Depth Textures and Shadows  495


Part II: The New Testament

Chapter 15   Programmable Pipeline: This Isn’t Your Father’s OpenGL  515

Chapter 16   Vertex Shading: Do-It-Yourself Transform, Lighting, and Texgen  547

Chapter 17   Fragment Shading: Empower Your Pixel Processing  567

Chapter 18   Advanced Buffers  601


Part III: The Apocrypha

Chapter 19   Wiggle: OpenGL on Windows  641

Chapter 20   OpenGL on Mac OS X  685

Chapter 21   OpenGL on Linux  713

Chapter 22   OpenGL ES — OpenGL on the Small  735


Appendix A    Further Reading/References  773

Appendix B    Glossary  777

Appendix C   API Reference  783

Index  1141


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About the Author:

Richard S. Wright, Jr.has been using OpenGL for more than 12 years, since it first became available on the Windows platform, and teaches OpenGL programming in the game design degree program at Full Sail in Orlando, Florida. Currently, Richard is the president of Starstone Software Systems, Inc., where he develops third-party multimedia simulation software for the PC and Macintosh platforms using OpenGL.

Previously with Real 3D/Lockheed Martin, Richard was a regular OpenGL ARB attendee and contributed to the OpenGL 1.2 specification and conformance tests. Since then, Richard has worked in multidimensional database visualization, game development, medical diagnostic visualization, and astronomical space simulation.

Richard first learned to program in the eighth grade in 1978 on a paper terminal. At age 16, his parents let him buy a computer with his grass-cutting money instead of a car, and he sold his first computer program less than a year later (and it was a graphics program!). When he graduated from high school, his first job was teaching programming and computer literacy for a local consumer education company. He studied electrical engineering and computer science at the University of Louisville’s Speed Scientific School and made it half way through his senior year before his career got the best of him and took him to Florida. A native of Louisville, Kentucky, he now lives with his wife and three children in Lake Mary, Florida. When not programming or dodging hurricanes, Richard is an avid amateur astronomer and an Adult Sunday School teacher.


Benjamin Lipchak graduated from Worcester Polytechnic Institute with a double major in technical writing and computer science. “Why would anyone with a CS degree want to become a writer?” That was the question asked of him one fateful morning when Benj was interviewing for a tech writing job at Digital Equipment Corporation. Benj’s interview took longer than scheduled, and he left that day with job offer in hand to work on the software team responsible for DEC’s AlphaStation OpenGL drivers.

Benj’s participation in the OpenGL Architecture Review Board began when he chaired the working group that generated the GL_ARB_fragment_program extension spec. While chairing the Khronos OpenGL Ecosystem Technical SubGroup, he established the OpenGL SDK and created the OpenGL Pipeline newsletter, of which he remains editor.

Benj will now participate in the Khronos OpenGL ES Working Group. After 12 years of OpenGL driver development and driver team management at DEC, Compaq, and ATI, he is headed for smaller pastures. Benj recently became manager of AMD’s handheld software team. Although the API is familiar, the new challenges of size and power consumption make for a great change of scenery. In his fleeting spare time, Benj tries to get outdoors for some hiking or kayaking. He also operates an independent record label, Wachusett Records, specializing in solo piano music.


Nicholas Haemel, developer at AMD in the Graphics Products Group, was technical reviewer for OpenGL SuperBible, Third Edition, and contributed the chapters on GLX and OpenGL ES.


Excerpt. © Reprinted by permission. All rights reserved.:

OpenGL SuperBible: Preface

My career has been built on a long history of making "stupid" choices and accidentally being right. First, I went to Microsoft's DOS, instead of the wildly popular CP/M. Later, I recall, friends counseled me that Windows was dead, and too hard to program for, and that OS/2 was the future (you couldn't lose by sticking with IBM, they'd say).

Just got lucky, I guess.

There were a few other minor wrong turns that just happened to fortunately have me pointed away from some other collapsing industry segment, but my next really big stupid decision was writing the first edition of this book. I had already built a nice comfortable career out of fixing SQL database problems, and was making the transition to large-scale enterprise IT solutions in the healthcare industry. A book on OpenGL? I had no idea what I was doing. The first time I read the official OpenGL specification, I had to all but breathe in a paper bag, my first co-author quit in disgust, and the whole project was very nearly canceled before the book was half-finished.

As soon as the book came out, I had some meager credibility outside my normal field of expertise. I was offered a job at Lockheed-Martin/Real3D doing "real" OpenGL work. My then-current boss (God bless you, David, wherever you are!) tried really hard to talk me out of throwing my career away. Everybody knows, he insisted, that whatever Microsoft does is going to be the way the industry goes, and Microsoft's Taligent (no, not the operating system, but a 3D standard predating Direct 3D) graphics platform was going to bury OpenGL into obscurity. Besides, there was only one other book on OpenGL in existence; how big a thing could it possibly be?

Eleven years have passed, and as I finish yet the fourth edition of this book (and looking at a shelf full of OpenGL books), the number of people reading this who remember the short-lived hype of Taligent would probably fit in the back of my minivan. An OpenGL engineer I used to know at IBM had in her e-mail signature: "OpenGL. It's everywhere. Do the math." This has never been truer than it is today.

OpenGL today is the industry-leading standard graphics API on nearly every conceivable platform. This includes not only desktop Windows PCs and Macs, but UNIX workstations, location-based entertainment systems, major game consoles (all but one), hand-held gaming devices, cellphones, and a myriad of other embedded systems such as avionic and vehicle instrumentation.

Across platforms, OpenGL is the undisputed champion of 3D content creation applications, 3D games, visualization, simulation, scientific modeling, and even 2D image and video editing. OpenGL's widespread success can be attributed to its elegance and ease of use, its power and flexibility, and the overwhelming support it has received from the developer and IHV communities. OpenGL can be extended as well, providing all the benefits of an open standard, as well as giving vendors the ability to add their own proprietary added value to implementations.

You have probably heard that programmable hardware is the future of 3D graphics programming, and of graphics APIs. This is no longer true. Programmable hardware is no longer in the future; it is here now, today, even on the lowest cost motherboard embedded 3D chipsets. It is not a fluke that this edition follows the last at the closest interval of the series. The pace of evolving graphics technology is simply staggering, and this edition brings you up-to-date on the now-latest OpenGL version 2.1.

We have reinforced the chapters on fixed-pipeline programming, which is not going away anytime soon, and have affectionately deemed them "The Old Testament."; still relevant, illustrative, and the foundation on which the "New Testament" of programmable hardware is based. I find the analogy quite appropriate, and I would refute anyone who thinks the fixed pipeline is completely dead and irrelevant. The rank and file of application developers (not necessarily cutting-edge game developers) would, I'm sure, agree.

That said, we have still trimmed some dead weight. Color Index mode is ignored as much as possible, some old paletted rendering material from the Windows chapter has been pruned, and we have eliminated all the old low-level assembly-style shader material to make room for updated and expanded coverage of the high-level shading language (GLSL). You'll also find a whole new chapter on OpenGL on hand-held systems, totally rewritten Mac OS X and Linux chapters, and a really great new chapter on advanced buffer techniques such as offscreen rendering, and floating-point textures.

Another big change some readers will notice is that the OpenGL SuperBible has been acquired and adopted into the Addison-Wesley Professional OpenGL series. I can't begin to express how grateful I am and humbled I feel by this honor. I myself have worn out the covers on at least one edition of every volume in this series.

One of the reasons, I think, for the longevity of this book has been the unique approach it takes among OpenGL books. As much as possible, we look at things through the eyes of someone who is excited by 3D graphics but knows very little about the topic. The purpose of a tutorial is to get you started, not teach you everything you will ever need to know. Every professional knows that you never reach this place. I do occasionally get some criticism for glossing over things too much, or not explaining things according to the strictest engineering accuracy. These almost never come from those for whom this book was intended. We hope for a great many of you that this will be your first book on OpenGL and 3D graphics. We hope for none of you that it will be your last.

Well, I did make one really "smart" decision about my career once. Once upon a time in the early 1980s, I was a student looking at a computer in an electronics store. The salesman approached and began making his pitch. I told him I was just learning to program and was considering an Amiga over his model. I was briskly informed that I needed to get serious with a computer that the rest of the world was using. An Amiga, he told me, was not good for anything but "making pretty pictures." No one, he assured me, could make a living making pretty pictures on his computer. Unfortunately, I listened to this "smart" advice and regretted it for over ten years. Thank God I finally got stupid.

As for making a living "making pretty pictures"? Do the math.

Oh, and my latest stupid decision? I've left Windows and switched to the Mac. Time will tell if my luck holds out.

Richard S. Wright Jr.

Preface to the Previous, Third Edition

I have a confession to make. The first time I ever heard of OpenGL was at the 1992 Win32 Developers Conference in San Francisco. Windows NT 3.1 was in early beta (or late alpha), and many vendors were present, pledging their future support for this exciting new graphics technology. Among them was a company called Silicon Graphics, Inc. (SGI). The SGI representatives were showing off their graphics workstations and playing video demos of special effects from some popular movies. Their primary purpose in this booth, however, was to promote a new 3D graphics standard called OpenGL. It was based on SGI's proprietary IRIS GL and was fresh out of the box as a graphics standard. Significantly, Microsoft was pledging future support for OpenGL in Windows NT.

I had to wait until the beta release of NT 3.5 before I got my first personal taste of OpenGL. Those first OpenGL-based screensavers only scratched the surface of what was possible with this graphics API. Like many other people, I struggled through the Microsoft help files and bought a copy of the OpenGL Programming Guide (now called simply "The Red Book" by most). The Red Book was not a primer, however, and it assumed a lot of knowledge that I just didn't have.

Now for that confession I promised. How did I learn OpenGL? I learned it by writing a book about it. That's right, the first edition of the OpenGL SuperBible was me learning how to do 3D graphics myself...with a deadline! Somehow I pulled it off, and in 1996 the first edition of the book you are holding was born. Teaching myself OpenGL from scratch enabled me somehow to better explain the API to others in a manner that a lot of people seemed to like. The whole project was nearly canceled when Waite Group Press was acquired by another publisher halfway through the publishing process. Mitchell Waite stuck to his guns and insisted that OpenGL was going to be "the next big thing" in computer graphics. Vindication arrived when an emergency reprint was required because the first run of the book sold out before ever making it to the warehouse.

That was a long time ago, and in what seems like a galaxy far, far away...

Only three years later 3D accelerated graphics were a staple for even the most stripped-down PCs. The "API Wars," a political battle between Microsoft and SGI, had come and gone; OpenGL was firmly established in the PC world; and 3D hardware acceleration was as common as CD-ROMs and sound cards. I had even managed to turn my career more toward an OpenGL orientation and had the privilege of contributing in some small ways to the OpenGL specification for version 1.2 while working at Lockheed Martin/Real 3D. The second edition of this book, released at the end of 1999, was significantly expanded and corrected. We even made some modest initial attempts to ensure that all the sample programs were more friendly in non-Windows platforms by using the GLUT framework.

Now, nearly five years later (eight since the first edition!), we bring you yet again another edition, the third, of this book. OpenGL is now without question the premier cross-platform real-time 3D graphics API. Excellent OpenGL stability and performance are available on even the most stripped-down bargain PC today. OpenGL is also the standard for UNIX and Linux operating systems, and Apple has made OpenGL a core fundamental technology for the new Mac OS X operating system. OpenGL is even making inroads via a new specification, OpenGL ES, into embedded and mobile spaces. Who would have thought five years ago that we would see Quake running on a cellphone?

It is exciting that, today, even laptops have 3D acceleration, and OpenGL is truly everywhere and on every mainstream computing platform. Even more exciting, however, is the continuing evolution of computer graphics hardware. Today, most graphics hardware is programmable, and OpenGL even has its own shading language, which can produce stunningly realistic graphics that were undreamed of on commodity hardware back in the last century (I just had to squeeze that in someplace!).

With this third edition, I am pleased that we have added Benjamin Lipchak as a coauthor. Benj is primarily responsible for the chapters that deal with OpenGL shader programs; and coming from the ARB groups responsible for this aspect of OpenGL, he is one of the most qualified authors on this topic in the world.

We have also fully left behind the "Microsoft Specific" characteristics of the first edition and have embraced a more multiplatform approach. All the programming examples in this book have been tested on Windows, Mac OS X, and at least one version of Linux. There is even one chapter apiece on these operating systems, with information about using OpenGL with native applications.

Richard S. Wright Jr.

© Copyright Pearson Education. All rights reserved.

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