Professionalize your game by adding sounds and text for menus and labels throughout your game. SOUND To play sounds you need the Sound Engine, which you import into your layer like so: #import “SimpleAudioEngine.h” Then you can just code a method to handle some background music playing: -(void)loadAudio { // Loading Sounds Synchronously [CDSoundEngine setMixerSampleRate:CD_SAMPLE_RATE_MID]; [[CDAudioManager sharedManager] setResignBehavior:kAMRBStopPlay autoHandle:YES]; soundEngine = [SimpleAudioEngine sharedEngine]; [soundEngine preloadBackgroundMusic:BACKGROUND_MUSIC]; [soundEngine playBackgroundMusic:BACKGROUND_MUSIC]; } You can see immediately that you can preload the audio in one place and then play it in another. This is great for game performance. This means you can preload audio in the main menu, for example, and then play it when… Read More
Continue ReadingCocos2d Tips: Design Game Objects for your game
Keep your game classes organized and logically ordered. Create a GameObject class, a GameCharacter class and then subclass these. Its important to keep your Game Objects ordered as well as your code. The more you order your objects, the cleaner your code will be as well. A GameObject is anything used in a game from labels to sprites to power ups. Its important to create a base class for all objects because, as a simple example, you want to be able to constrain all game objects to your screen. Its not unthinkable to believe that at some point you might inadvertently cause a game object to be pushed off screen.… Read More
Continue ReadingCocos2d Tips: Scrolling, Parallax and wider levels
Wider Levels & Scrolling When you create a game in Cocos2d, your screen measures 960 pixels wide on iPhone4+ and 2048 on iPad. If we want him to move farther to the right then we need to make the level bigger. Normally we set: levelSize = screenSize; But now we basically wish to make: levelSize = CGSizeMake(screenSize.width * 2.0f, screenSize.height); // levelSize code What we are doing is changing our scene levelSize to 2x the screenSize. Our level is now twice as big and we have a GameScene, which contains a GameplayLayer & a BackgroundLayer with some background image. We want to add a layer that will scroll in the opposite… Read More
Continue ReadingCocos2d Tips: Transitioning between game screens
Let’s learn how to create menu for a cocos2d game and how to move between a menu, the game scene, a level complete scene etc. Eventually your game will grow and you will have to create a clear structure to keep everything organized. As you can see, as with any app, the AppDelegate is the first object called. As such, it is the entry point to your game and will call the very first scene of your game. This means the first scene should probably the main menu which welcomes the user to the game and presents him with options. As you can see from the Cocos2d tips “Creating a… Read More
Continue ReadingCocos2d Tips: Connect Layers
Games have many layers. The most common example is the main action layer (where the players and enemies are) having to communicate with the HUD layer (which presents score, health and other info) to the gamer. Let’s see how we can communicate between layers. Typically you create a Scene and then a Layer in order to add that Layer as a child to the Scene. Let’s say our Scene.h looks like this: #import <Foundation/Foundation.h> #import “cocos2d.h” @interface Scene1 : CCScene { } @end And our Scene.m looks like this: -(id)init { if ((self = [super init])) { Scene1ActionLayer * actionLayer = [[[Scene1ActionLayer alloc] init] autorelease]; [self addChild:actionLayer z:0 tag:kActionLayer]; }… Read More
Continue Reading2012 in review
The WordPress.com stats helper monkeys prepared a 2012 annual report for this blog. Here’s an excerpt: 4,329 films were submitted to the 2012 Cannes Film Festival. This blog had 17,000 views in 2012. If each view were a film, this blog would power 4 Film Festivals Click here to see the complete report.
Continue ReadingiOS App or Cocos2d Game Design – Grand Scheme
A lot of programmers that are entering the iOS application or Cocos2d game arena are somewhat confused about the overall scheme of things. They can’t see the forest for the trees. I’m a very visual learner myself, which actually makes me a rather bad programmer. Actually it makes me a bad programmer because I’m slow to pick stuff up. I need to see the big picture and then dive into the details, not the other way around. So I put together a simple image, for visual learners like myself, to understand how things operate. At this moment its a very simple image. I intend to update it constantly in order… Read More
Continue ReadingTexurePacker 3.0.1 is the best tool for sprite sheets
Spritesheets are a must these days, what with having to include so much eyecandy now that games for iOS are getting so sophisticated. Even if not for performance issues, spritesheets are great for simply keeping assets organized in a game. Add to that the easy to use AutoSD option which makes your HD or Retina Display assets as well as the non-Retina assets easy to manage, TP is by far the best tool for the job. Whether you are a newbie or advanced developer, we highly recommend you pick it up asap. You’ll see how easy it is to manage your assets and export them. This is a tool… Read More
Continue ReadingCocos2d Tips: Creating a Menu
You can create a menu by creating label items or image items and passing them to a CCMenu object. A typical MainMenuScene.m file might look like this: -(void)playScene:(CCMenuItemFont*)itemPassedIn { if ([itemPassedIn tag] == 1) { [[GameManager sharedGameManager] runSceneWithID:kIntroScene]; } else if ([itemPassedIn tag] == 2) { [[GameManager sharedGameManager] runSceneWithID:kSecondScene]; } else if ([itemPassedIn tag] == 3) { [[GameManager sharedGameManager] runSceneWithID:kThirdScene]; } else { CCLOG(@”Unexpected item. Tag was: %d”, [itemPassedIn tag]); } } -(void)displayMainMenu { CGSize screenSize = [CCDirector sharedDirector].winSize; if (sceneSelectMenu != nil) { [sceneSelectMenu removeFromParentAndCleanup:YES]; } // Main Menu CCMenuItemImage *playGameButton = [CCMenuItemImage itemWithNormalImage:@”TapMeToPlay.png” selectedImage:@”TapMeToPlay.png” disabledImage:nil target:self selector:@selector(displaySceneSelection)]; CCMenuItemImage *optionsButton = [CCMenuItemImage itemFromNormalImage:@”someImage.png” selectedImage:@”someImage.png” disabledImage:nil target:self selector:@selector(showOptions)]; mainMenu =… Read More
Continue ReadingCocos2d Tips: Animations and image sizing
So you have some art but don’t know how to properly size it for the iPad or iPhone in their 2 versions (retina and non-retina display)! Let’s learn about image sizing and how to use these images in animations for your game objects (player, enemies, power ups or simple eye candy). Before we even get into creating animations, we need to clear up the sizing issue. Currently there are 4 screen sizes: iPhone NonRetina = 480 x320 iPhone Retina = 960 x 640 iPad NonRetina = 1024 x 768 iPad Retina = 2048 x 1536 This means that when creating art for a game, you will go bonkers sizing images… Read More
Continue ReadingCocos2d Tips: How to design a game coding strategy
Know you know quite a bit, enough to make a game. Do you know how and where to start? Let’s look at how to start coding your action layer, what code to put in what methods and how to keep your update method clean and tidy. When I started coding, and unfortunately most of my current projects are still coded that way, I simply opened up Xcode and started coding. iOS apps are a bit better because you can use the “hooks” methods they come with such as viewDidLoad and cellForRowAtIndexPath etc. Games are a bit more confusing because you are given an empty slate. At least in Cocos2d you… Read More
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