Game Physics Hardcover – Dec 8 2003
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"I keep at most a dozen reference texts within easy reach of my workstation computer. This book will replace two of them."-Ian Ashdown, President, byHeart Consultants Limited
"Implementing physical simulations for real-time games is a complex task that requires a solid understanding of a wide range of concepts from the fields of mathematics and physics. Previously, the relevant information could only be gleaned through obscure research papers. Thanks to Game Physics, all this information is now available in a single, easily accessible volume. Dave has yet again produced a must-have book for game technology programmers everywhere." -Christer Ericson, Technology Lead, Sony Computer Entertainment
"Game Physics is a comprehensive reference of physical simulation techniques relevant to games and also contains a clear presentation of the mathematical background concepts fundamental to most types of game programming. I wish I had this book years ago." -Naty Hoffman, Senior Software Engineer, Naughty Dog, Inc.
"Eppur si muove . . . and yet it moves. From Galileo to game development, this book will surely become a standard reference for modeling movement." -Ian Ashdown, President, byHeart Consultants Limited
"This is an excellent companion volume to Dave's earlier 3D Game Engine Design. It shares the approach and strengths of his previous book. He doesn't try to pare down to the minimum necessary information that would allow you to build something with no more than basic functionality. Instead, he gives you all you need to begin working on a professional-caliber system. He puts the concepts firmly in context with current, ongoing research, so you have plenty of guidance on where to go if you are inclined to add even more features on your own. This is not a cookbook-it's a concise presentation of all the basic concepts needed to understand and use physics in a modern game engine. It gives you a firm foundation you can use either to build a complete engine of your own or to understand what's going on inside the new powerful middleware physics engines available today. This book, especially when coupled with Dave's 3D Game Engine Design, provides the most complete resource of the mathematics relevant to modern 3D games that I can imagine. Along with clear descriptions of the mathematics and algorithms needed to create a powerful physics engine are sections covering pretty much all of the math you will encounter anywhere in the game-quaternions, linear algebra, and calculus." -Peter Lipson, Senior Programmer, Toys For Bob
"This comprehensive introduction to the field of game physics will be invaluable to anyone interested in the increasingly more important aspect of video game production, namely, striving to achieve realism. Drawing from areas such as robotics, dynamic simulation, mathematical modeling, and control theory, this book succeeds in presenting the material in a concise and cohesive way. As a matter of fact, it can be recommended not only to video game professionals but also to students and practitioners of the above-mentioned disciplines." -Pål-Kristian Engstad, Senior Software Engineer, Naughty Dog, Inc.
"Increases in processor power now make it feasible to run complex physical simulations in real time, which greatly increases their practical importance. Thus there is an increasing need for books like David Eberly's Game Physics that can give graphics programmers a grounding in the physical principles that underlie realistic computer animation." - W.Lewis Johnson --Physics Today
Dave Eberly's much anticipated sequel to his international bestseller on game engines.See all Product Description
Top Customer Reviews
The main problem with this book is the treatment is incomplete, superficial, or just wrong (from a physics/math point of view), and the typical programmer/computer scientist is not likely to know it. I am reminded of the great fluid dynamicist von Karmen's definition of an engineer as that person who perpetuates the mistakes made by the previous generation. The REASON a game programmer can get away with this is that he is not testing his results by real experiment...his world is a computer generated simulation with arbitrary approximations to physical laws that the programmer deems to impose.
The other problem is that there are usually a multitude of techniques that one can pick to solve a given mechanics problem...and what would have been really valuable is if the author had shown why a particular method is better (for example, Newton's Laws vs. Lagrange's Equations) when the time comes to code the algorithm. We are not looking for Eberly primarily to teach us physics (but if he makes the attempt, it should be correct!)-that is always going to be the job of physics courses. Instead, he needs to tell us which method is useful for coding and why-this, sadly, he has not done.
As an illustration of what I mean...look at how Petzold in 'Programming Windows with C#' discuss the elementary process of using GDI+ to draw a curve. There are two approaches, using rectangular coordinates, or using parametric equations (polar coordinates). Petzold explains WHY the parametric approach is superior from a programming point of view.
Any advanced sophomore or junior physics student will know most of the physics presented here (classical mechanics)...Read more ›
But as computers get more powerful, and players might find themselves driving cars, for example, then having these vehicles respond accurately when driven became the next logical step in simulation.
The book covers Newtonian mechanics, because that is what we are typically familiar with. If you are a physicist, you should recall that historically there were 2 great advances within this - Hamiltonian and Lagrangian methods. (Cf. Goldstein's "Classical Mechanics".) A little ironic, wouldn't you say, that now some jobs in applying these are for games?! Who would have thought it, some twenty years ago.
The book is good for helping you focus on what objects in the system you should be modelling. Part of your experience comes in deciding this level of detail. Actually, this is not restricted to games, but to any physical system that you are analysing.
The graphics in this book are really a secondary consideration. Stay focused. Model the system FIRST. Then attend to the views. Even though the views are what the player sees.
To this end, you should be pleased to know that the author sticks to graphics standards like OpenGL, which can be ported to most current computers. So you don't have to invest your time in learning some restricted graphics language.
5 stars for math but forget buying this book to implement games. Putting the word "game" in the title is just a way to attract buyers.
This book can be compared with Coutinho's "Dynamic Simulations of Multibody Systems". I believe the latter covers more materials, but Eberly's is easier to read. The book would be almost sufficient if you also have his previous book "3D Game Engine Design".
I am not sure why the author wrote chapter 4 and 6. I suppose these can be left out. It would have been more compact.
No es un libro que explique las cosas "con manzanitas".
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