Table Of ContentMore Python
®
Programming for the
Absolute Beginner
Jonathan S. Harbour
Course Technology PTR
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More Python® Programming for the © 2012 Course Technology, a part of Cengage Learning.
Absolute Beginner: Jonathan S.
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Harbour
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This book is dedicated to lone game developers on forums like
The Game Programming Wiki (www.gpwiki.org) who put
enormous passion into their creative works of interactive
fiction, often without recognition. Do what you love and share
it with the world!
A
CKNOWLEDGMENTS
I
offer my gratitude to those involved in getting this book finished and into
print, especially Mitzi Koontz, Jenny Davidson, Keith Davenport, Mike
Tanamachi, and Michael Beady. I would like to say, I hope it sells a million
copies so I never have to work with any of you again, but that sentiment might be
misunderstood and considered rude! So I will just say thanks!
A A
BOUT THE UTHOR
J
onathan S. Harbour has been programming since the 1980s. His first game
system was an Atari 2600, which he disassembled on the floor of his room
as a kid. He has written on C++, C#, Basic, Java, DirectX, Allegro, Lua, Dark-
Basic, Game Boy Advance, Pocket PC, and game consoles. His other recent books
include Beginning Java SE 6 Game Programming, Third Edition; XNA Game Studio 4.0 for
Xbox 360 Developers; Multi-Threaded Game Engine Design; and an earlier book in this
series, Visual Basic .NET Programming for the Absolute Beginner (2003). He holds a mas-
ter’s degree in information systems. Visit him on the web at www.jharbour.com
and www.facebook.com/jharbourcom.
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Table of Contents
Chapter 1 Python Has Class....................................................... 1
Examining the Geometry Program................................................................................... 2
Getting Started with Python............................................................................................... 2
Python Tools................................................................................................................... 3
Python Language........................................................................................................... 7
Objects in Python................................................................................................................... 7
What Came Before?....................................................................................................... 7
What’s Coming Next?................................................................................................. 11
OOP: The Python Way................................................................................................. 13
Single Inheritance....................................................................................................... 16
Multiple Inheritance.................................................................................................. 17
Summary................................................................................................................................ 19
Chapter 2 Getting Started with Pygame: The Pie Game......... 21
Examining The Pie Game................................................................................................... 22
Using Pygame........................................................................................................................ 22
Printing Text................................................................................................................. 23
Looping........................................................................................................................... 24
Drawing Circles............................................................................................................ 25
Drawing Rectangles.................................................................................................... 27
Drawing Lines............................................................................................................... 28
Drawing Arcs................................................................................................................ 30
The Pie Game......................................................................................................................... 31
Summary................................................................................................................................ 34
Chapter 3 File I/O, Data, and Fonts: The Trivia Game.......... 35
Examining The Trivia Game............................................................................................. 35
Python Data Types............................................................................................................... 36
More Printing............................................................................................................... 37
Getting User Input...................................................................................................... 39
Handling Exceptions.................................................................................................. 40
The Mad Lib Game....................................................................................................... 40
File Input/Output................................................................................................................. 43
Working with Text Files............................................................................................ 43
viii More Python Programming for the Absolute Beginner
Working with Binary Files........................................................................................ 45
The Trivia Game................................................................................................................... 47
Printing Text with Pygame....................................................................................... 48
The Trivia Class............................................................................................................ 48
Loading the Trivia Data............................................................................................. 49
Displaying the Question and Answers................................................................... 50
Responding to User Input......................................................................................... 52
Going to the Next Question...................................................................................... 53
Main Code...................................................................................................................... 54
Summary................................................................................................................................ 55
Chapter 4 User Input: The Bomb Catcher Game..................... 57
Examining The Bomb Catcher Game............................................................................. 58
Pygame Events...................................................................................................................... 58
Real-Time Event Loop................................................................................................. 59
Keyboard Events........................................................................................................... 60
Mouse Events................................................................................................................ 61
Device Polling....................................................................................................................... 61
Polling the Keyboard.................................................................................................. 61
Polling the Mouse........................................................................................................ 65
The Bomb Catcher Game................................................................................................... 67
Summary................................................................................................................................ 71
Chapter 5 Math and Graphics: The Analog Clock Demo..... 73
Examining The Analog Clock Demo............................................................................... 74
Basic Trigonometry............................................................................................................. 74
Circle Theory................................................................................................................. 75
Traversing a Circle’s Perimeter................................................................................ 79
Circle Demo.................................................................................................................. 81
The Analog Clock Demo..................................................................................................... 83
Getting the Time......................................................................................................... 84
Drawing the Clock...................................................................................................... 84
Summary................................................................................................................................ 92
Chapter 6 Bitmap Graphics: The Orbiting Spaceship Demo.. 93
Examining The Orbiting Spaceship Demo.................................................................... 93
Using Bitmaps....................................................................................................................... 94
Loading a Bitmap......................................................................................................... 94
Drawing the Background.......................................................................................... 95
Drawing the Planet..................................................................................................... 97
Contents ix
Drawing the Spaceship.............................................................................................. 98
Orbiting the Planet........................................................................................................... 101
Orbiting........................................................................................................................ 101
Rotating....................................................................................................................... 103
Summary.............................................................................................................................. 107
Chapter 7 Animation with Sprites: The Escape the Dragon
Game......................................................................... 109
Examining The Escape The Dragon Game.................................................................. 109
Using Pygame Sprites....................................................................................................... 110
Custom Animation................................................................................................... 110
Loading a Sprite Sheet............................................................................................. 112
Changing the Frame................................................................................................. 112
Drawing One Frame.................................................................................................. 114
Sprite Groups.............................................................................................................. 115
MySprite Class............................................................................................................ 116
Sprite Animation to the Test.................................................................................. 118
The Escape the Dragon Game......................................................................................... 119
Jumping....................................................................................................................... 120
Colliding...................................................................................................................... 121
Source Code................................................................................................................ 122
Summary.............................................................................................................................. 125
Chapter 8 Sprite Collision Detection: The Zombie Mob
Game......................................................................... 127
Examining The Zombie Mob Game.............................................................................. 127
Collision Detection Techniques..................................................................................... 128
Rectangle Collision Between Two Sprites........................................................... 128
Circle Collision Between Two Sprites.................................................................. 129
Pixel-Perfect Masked Collision Between Two Sprites....................................... 130
Rectangle Collision Between a Sprite and a Group.......................................... 130
Rectangle Collision Between Two Groups.......................................................... 131
The Zombie Mob Game.................................................................................................... 131
Creating Your Own Module.................................................................................... 132
Advanced Directional Animation......................................................................... 135
Colliding with Zombies........................................................................................... 138
Getting Health............................................................................................................ 139
Game Source Code.................................................................................................... 141
Summary.............................................................................................................................. 146
