Book Image

Creating Games with cocos2d for iPhone 2

By : Paul Nygard
Book Image

Creating Games with cocos2d for iPhone 2

By: Paul Nygard

Overview of this book

Cocos2d for iPhone is a simple (but powerful) 2D framework that makes it easy to create games for the iPhone. There are thousands of games in the App Store already using cocos2d. Game development has never been this approachable and easy to get started. "Creating Games with cocos2d for iPhone 2" takes you through the entire process of designing and building nine complete games for the iPhone, iPod Touch, or iPad using cocos2d 2.0. The projects start simply and gradually increase in complexity, building on the lessons learned in previous chapters. Good design practices are emphasized throughout. From a simple match game to an endless runner, you will learn how to build a wide variety of game styles. You will learn how to implement animation, actions, create "artificial randomness", use the Box2D physics engine, create tile maps, and even use Bluetooth to play between two devices. "Creating games with cocos2d for iPhone 2" will take your game building skills to the next level.
Table of Contents (16 chapters)
Creating Games with cocos2d for iPhone 2
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Building the enemy


Now we have a world to run around in and bullets to shoot, but nobody to stop us from reaching our goals. We need to add some enemies to spice it up. As we go through the enemy handling code, keep in mind how we set up the hero. You will see a lot of similarities, and we could have compressed them into a single base class, but opted not to do so for clarity's sake.

Filename: TDEnemy.m

+(id) enemyAtPos:(CGPoint)pos onLayer:(TDPlayfieldLayer*)layer {
    return [[[self alloc] initForEnemyAtPos:pos onLayer:layer]
                                                autorelease];
}

-(id) initForEnemyAtPos:(CGPoint)pos
                   onLayer:(TDPlayfieldLayer*)layer  {
    if((self = [super init])) {
        // Keep a reference to the layer
        parentLayer = layer;

        // Build the sprite
        [self buildEnemySpriteAtPos:pos];
 
        // Add the sprite to the layer
        [parentLayer addChild:sprite z:2];
    
        // Set the max shooting speed
     ...