文档介绍：For your convenience Apress has placed some of the front
matter material after the index. Please use the Bookmarks
and Contents at a Glance links to access them.
Contents at a Glance
Contents ...................................................................................................................... vi
About the Author ....................................................................................................... xv
About the Technical Reviewers ............................................................................... xvi
About the the Cover Image Artist ........................................................................... xvii
Acknowledgments .................................................................................................. xviii
Introduction ............................................................................................................... xix
Part I:JavaScript Animation Basics
Chapter 1 :Basic Animation Concepts ....................................................................... 3
Chapter 2: Basics of JavaScript for Animation ......................................................... 9
Chapter 3: Trigonometry for Animation ................................................................... 35
Chapter 4: Trigonometry for Animation ................................................................... 69
Part II:Basic Motion
Chapter 5: Velocity and Acceleration .................................................................... 105
Chapter 6: Boundaries and Friction ....................................................................... 131
Chapter 7: User Interaction: Moving Objects Around .......................................... 153
Part III: Advanced Motion
Chapter 8: Easing and Springing ........................................................................... 169
Chapter 9:Collision Detection ..............................................................