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.
Table of Contents (15 chapters)
Cocos2d for iPhone 1 Game Development Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Using positional audio in a game


To increase the realism of the sounds we use in a game, we can modify audio properties based on in-game factors. In this example, we use source distance, audible range, and object size to determine gain, pitch, and pan. We'll demonstrate this by adding sounds to the TopDownIsometric demo from Chapter 4 ,Physics.

Getting ready

Please refer to the project RecipeCollection02 for full working code of this recipe.

How to do it...

Execute the following code:

#import "Ch4_TopDownIsometric.h"
#import "SimpleAudioEngine.h"

enum {
  CGROUP_NON_INTERRUPTIBLE = 0
};

@interface Ch6_PositionalAudio : Ch4_TopDownIsometric
/* CODE OMITTED */
@end

@implementation Ch6_PositionalAudio

-(CCLayer*) runRecipe {
  //Run our top-down isometric game recipe
  [super runRecipe];

  //Initialize max audible range
  audibleRange = 20.0f;

  //Initialize the audio engine
  sae = [SimpleAudioEngine sharedEngine];

  //Background music is stopped on resign and resumed on becoming active...