Book Image

Cocos2d for iPhone 1 Game Development Cookbook

By : Nathan Burba
Book Image

Cocos2d for iPhone 1 Game Development Cookbook

By: Nathan Burba

Overview of this book

Cocos2d for iPhone is a robust but simple-to-use 2D game framework for iPhone. It is easy to use, fast, flexible, free, and Appstore approved. More than 2500 AppStore games already use it, including many best-seller games. Do you want to take your cocos2d game development skills to the next level and become more professional in cocos2d game design? Cocos2d for iPhone 1 Game Development Cookbook will help you reach that next level. You will find over 100 recipes here that explain everything from the drawing of a single sprite to AI pathfinding and advanced networking. Full working examples are emphasized. Starting with the first chapter, Graphics, you will be taken through every major topic of game development. You will find both simple and complex recipes in the book. Each recipe is either a solution to a common problem (playing video files, accelerometer steering) or a cool advanced technique (3D rendering, textured polygons). This cookbook will have you creating professional quality iOS games quickly with its breadth of working example code.

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Cocos2d for iPhone 1 Game Development Cookbook
Nathan Burba
Dec, 2011 | 446 pages
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Table of Contents (15 chapters)
Cocos2d for iPhone 1 Game Development Cookbook
Cocos2d for iPhone 1 Game Development Cookbook
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Graphics
Graphics
Introduction
Drawing sprites
Coloring sprites
Animating sprites
Drawing OpenGL primitives
Playing video files
Grid, particle, and motion streak effects
Using Retina Display mode
1D and 2D Ease Actions
Rendering and texturing 3D shapes
Rendering a texture-filled polygon
Animating a texture-filled polygon
Swapping palettes using layers
Swapping palettes using CCTexture2DMutable
Using AWTextureFilter for blur and font shadows
Taking and using screenshots
Using CCParallaxNode
Lighting using glColorMask
2
User Input
User Input
Introduction
Tap, hold, and drag input
Depth testing input
Creating buttons
Creating a directional pad
Creating an analog stick
Using the accelerometer for steering
Using the accelerometer for 3D rotation
Pinch zooming
Performing gestures
3
Files and Data
Files and Data
Introduction
Reading PLIST data files
Reading JSON data files
Reading XML data files
Saving simple data using NSUserDefaults
Archiving objects into archive files
Mutating nested metadata
Saving data into a PLIST file
Saving data into an SQLite database
Saving data using Core Data
4
Physics
Physics
Introduction
Box2D setup and debug drawing
Creating collision response routines
Using different shapes
Dragging and collision filtering
Manipulating physical properties
Applying impulses
Applying forces
Asynchronous body destruction
Using joints
Creating a vehicle
Character movement
Simulating bullets
Simulating and rendering a rope
Creating a top-down isometric game engine
5
Scenes and Menus
Scenes and Menus
Introduction
Switching scenes
Transitioning between scenes
Using CCLayerMultiplex
Using CCLabel
Using CCMenu
Creating shadowed menu labels
UIKit alert dialogs
Wrapping UIKit
Creating draggable menu windows
Creating a horizontal scrollable menu
Creating a vertical sliding menu grid
Creating a loading screen with an indicator
Creating a minimap
6
Audio
Audio
Introduction
Playing sounds and music
Modifying audio properties
Fading sounds and music
Using audio in a game
Using positional audio in a game
Metering background music
Metering dialogue for animation
Streaming audio
Recording audio
Using the iPod music library
Creating a MIDI synthesizer
Speech recognition and text-to-speech
7
AI and Logic
AI and Logic
Introduction
Processing AI waypoints
Firing projectiles at moving targets
AI line of sight
AI flocking using Boids
A* pathfinding on a grid
A* pathfinding in a Box2D world
A* pathfinding on a TMX tilemap
A* pathfinding in a side-scroller
Running a Lua script
Dynamically loading Lua scripts
Using Lua for dialogue trees
8
Tips, Tools, and Ports
Tips, Tools, and Ports
Introduction
Accessing the Cocos2d-iPhone testbed
Packing textures using Zwoptex
Creating levels using Tiled
Creating levels using JSONWorldBuilder
Creating scenes with CocosBuilder
Using Cocos2d-X
Using Cocos3d
Releasing your app
Index
Index

Packing textures using Zwoptex

Creating sprite sheets by hand can be a tedious process. To solve this problem, we use Zwoptex Texture Packer to pack individual sprites into the smallest area possible. In this recipe, we walk through this process.

Getting ready

First we must download and install the Zwoptex application. Go to http://zwoptexapp.com/ and click on the Download link. Drag the application to your Applications folder.

How to do it...

Once you've started Zwoptex, click File | New. You should see a blank canvas. Here are some attributes of the canvas:

  • Canvas size:

    As you can see inside Zwoptex, the width and height of the Canvas can only go up to 2048 pixels. Also, they can only be a power of 2. On the iPhone 3G and older devices, uncompressed textures can have a maximum size of 1024x1024. On newer devices that support OpenGL ES 2.0, starting with the iPhone 3GS, uncompressed textures can be up to 2048x2048 pixels. Textures are only loaded into memory in powers of 2. Taking all of this...

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