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Learning Game Physics with Bullet Physics and OpenGL.pdf

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    Cover
    Copyright
    Credits
    About the Author
    About the Reviewers
    www.PacktPub.com
    Table of Contents
    Preface
    Chapter 1: Building a Game Application
    Application components
    Exploring the Bullet and FreeGLUT projects
    Exploring Bullet's built-in demo applications
    Starting a new project
    Building the application layer
    Configuring FreeGLUT
    glutKeyboardFunc/glutKeyboardUpFunc
    glutSpecialFunc/glutSpecialUpFunc
    glutMouseFunc
    glutMotionFunc/glutPassiveMotionFunc
    glutReshapeFunc
    glutDisplayFunc
    glutIdleFunc
    Initializing FreeGLUT
    glutInit
    glutInitDisplayMode
    glutInitWindowPosition/glutInitWindowSize
    glutCreateWindow
    glutSetOption
    Launching FreeGLUT
    Summary
    Chapter 2 : Rendering and User Input
    Rendering the scene
    Introducing double-buffering
    Understanding the basics of camera
    glIdentity
    glFrustum
    gluLookAt
    glViewport
    Basic rendering and lighting
    Creating a simple box
    Let there be light!
    Normals
    Creating ambient, diffuse, and specular lighting
    Understanding depth testing
    glLightfv
    glEnable
    glMaterialfv/glMateriali
    glShadeModel
    glDepthFunc
    Coloring your box
    Understanding rendering pipelines
    User input and camera control
    Implementing camera control
    Gathering user input
    Summary
    Chapter 3 : Physics Initialization
    The core bullet objects
    The world object
    The broad phase
    The collision configuration
    The collision dispatcher
    The constraint solver
    Creating the Bullet components
    Creating our first physics object
    The collision shape
    The motion state
    The collision object
    Building a custom motion state
    Creating a box
    Rendering from transform data
    Stepping the simulation
    Summary
    Chapter 4 : Object Management and Debug Rendering
    Handling multiple objects
    Designing our objects
    Rendering our objects
    Storing our objects
    Creating our objects
    Debug rendering
    Building the debug drawer
    Introducing activation states
    The domino effect
    Summary
    Chapter 5 : Raycasting and Constraints
    The power of raycasting
    Picking rays
    Destroying objects
    Constraints
    Understanding constraints
    Picking up the objects
    Building a constraint
    Summary
    Chapter 6 : Events, Triggers, and Explosions
    Building a collision event system
    Explaining the persistent manifolds
    Managing the collision event
    Building trigger volumes
    Disabling contact response
    Force, torque, and impulse
    Understanding the object motion
    Applying forces
    Applying impulses
    Summary
    Chapter 7 : Collision Shapes
    Spheres and cylinders
    Convex hulls
    Creating convex hulls from mesh data
    Compound shapes
    Summary
    Chapter 8 : Collision Filtering
    Groups and masks
    Defining linear and angular freedom
    Summary
    Chapter 9 : Soft Body Dynamics
    Soft body requirements
    Initialization
    Creating soft bodies
    Rendering soft bodies
    Summary
    Index
    www.allitebooks.com
    Learning Game Physics with Bullet Physics and OpenGL Practical 3D physics simulation experience with modern feature-rich graphics and physics APIs Chris Dickinson BIRMINGHAM - MUMBAI
    Learning Game Physics with Bullet Physics and OpenGL Copyright © 2013 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. First published: October 2013 Production Reference: 1181013 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78328-187-9 www.packtpub.com Cover Image by Abhishek Pandey (abhishek.pandey1210@gmail.com) www.allitebooks.com
    Credits Author Chris Dickinson Proofreader Lesley Harrison Reviewers Marco Altomonte Ian Voyce Acquisition Editor Vinay Argekar Commissioning Editor Poonam Jain Technical Editor Shali Sasidharan Project Coordinator Amigya Khurana Indexer Monica Ajmera Mehta Graphics Ronak Dhruv Yuvraj Mannari Abhinash Sahu Production Coordinator Nitesh Thakur Cover Work Nitesh Thakur www.allitebooks.com
    About the Author Chris Dickinson grew up in England with a strong passion for science, mathematics, and, in particular, video games. He received his Master's degree in Physics with Electronics from the University of Leeds in 2005, and then left for California to work in scientific research in the heart of Silicon Valley. Finding that career path unsuitable, he began working in software testing and automation. For years, he attempted to unravel the magic behind video games and 3D worlds through modding and level design, and was mostly self taught in software development and design. But, realizing that he needed proper tutelage and a stronger grasp of the fundamentals, if he ever wanted to build these complex applications himself, he decided to undertake a Bachelor's in Game and Simulation Programming while simultaneously working full time. He earned his second degree in early 2013 and continues his career in software development/test automation while simultaneously developing independent game projects in his spare time. I would like to thank my wonderful wife and best friend, Jamie, for always being supportive, and eager to help; not to mention, for putting up with me and my never-ending list of projects and erratic work schedule. I'd also like to extend a warm thanks to the good folks at Blizzard Entertainment for bringing us together through a shared addiction to World of Warcraft. Also, my friends, for their constant pestering and high expectations of me to get things done, and, of course, my family for unleashing me on the world and giving me all of the possibilities I was able to explore. To have learned, lived, and loved so much in such a short space of time is only thanks to the opportunities and motivation given to me by all of you. www.allitebooks.com
    About the Reviewers Marco Altomonte is working for Milestone S.r.l. on the graphics engine used in multiplatform video games, such as MotoGP, World Rally Championship, and SBK. He developed the XNA game, RC Racing 360, published on Microsoft Live Marketplace for Xbox 360. He worked for ALTAIR Robotics Lab in Robotics and Physics Simulation department. He developed a GPGPU (General-purpose computing on graphics processing units) soft body simulator with haptic feedback for a surgeon training software. He authored Simulation of deformable environment with haptic feedback on GPU, published in Proceedings 3959-3964, IROS 2008: International Conference on Intelligent Robots and Systems. Ian Voyce is a developer with a broad range of experience gained over many years in the software industry. He has worked for a variety of clients from advertising agencies to investment banks, as well as made several independent releases to the Apple AppStore. He has a background in creative computing and user experience with in-depth technical knowledge and a professional specialism in quantitative development. He tries to find the time to combine his favorite pursuits of blogging (at www.voyce.com), creating and playing games, and spending quality of time with his two daughters. www.allitebooks.com
    www.PacktPub.com Support files, eBooks, discount offers and more You might want to visit www.PacktPub.com for support files and downloads related to your book. Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub.com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at service@packtpub.com for more details. At www.PacktPub.com, you can also read a collection of free technical articles, sign up for a range of free newsletters and receive exclusive discounts and offers on Packt books and eBooks. http://PacktLib.PacktPub.com Do you need instant solutions to your IT questions? PacktLib is Packt's online digital book library. Here, you can access, read and search across Packt's entire library of books. Why Subscribe? • Fully searchable across every book published by Packt • Copy and paste, print and bookmark content • On demand and accessible via web browser Free Access for Packt account holders If you have an account with Packt at www.PacktPub.com, you can use this to access PacktLib today and view nine entirely free books. Simply use your login credentials for immediate access. www.allitebooks.com
    Table of Contents 1 7 7 8 9 10 11 11 13 13 13 13 14 14 14 14 15 15 15 15 15 16 17 19 19 20 22 23 23 24 24 Preface Chapter 1: Building a Game Application Application components Exploring the Bullet and FreeGLUT projects Exploring Bullet's built-in demo applications Starting a new project Building the application layer Configuring FreeGLUT glutKeyboardFunc/glutKeyboardUpFunc glutSpecialFunc/glutSpecialUpFunc glutMouseFunc glutMotionFunc/glutPassiveMotionFunc glutReshapeFunc glutDisplayFunc glutIdleFunc Initializing FreeGLUT glutInit glutInitDisplayMode glutInitWindowPosition/glutInitWindowSize glutCreateWindow glutSetOption Launching FreeGLUT Summary Chapter 2: Rendering and User Input Rendering the scene Introducing double-buffering Understanding the basics of a camera glIdentity glFrustum gluLookAt glViewport www.allitebooks.com
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