cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   vhalik
   Member

   I created an enemy class that handles the animation, chipmunk and any other information that I would need. I can create a sprite from the layer and use the enemy class for all other information, but when I want to create the sprite form within the class AND animate it, I get an error. The error fails when I try to add the AtlasSpriteManager as a child from within the class. If I comment that line of code everything works minus the sprites being displayed of course.

   If it is any help I created my enemy class using http://juanmunozar.blogspot.com/ as a guide.

   So my two questions are

   1. Should the enemy class inherit from NSObject, AtlasSprite, Sprite or CocosNode?
   2. How can I handle animation from within the enemy class without adding AtlasSpriteManager as a child.

   I would rather the enemy class handle the sprite creation and animation than the layer for obvious reasons.

   I appreciate all the help!

   Posted 2 years ago #
2. 

   Dan
   Member

   AtlasSpriteManager should be a child to your scene or layer. Your enemy class should be an AtlasSprite if you are going to use the AtlasSpriteManager, or a Sprite if you are not. Your animation should be added to the sprite, and called via an Action. You can override the init function if you want to encapsulate everything in your enemy class.

   Without posting your failure code, its hard to know what you are doing. The above is just my guideline.

   -Dan

   Posted 2 years ago #
3. 

   vhalik
   Member

   So I should be doing this:
   @interface Enemy : AtlasSprite {

   - (id) initWithObject: (AtlasSpriteManager *) _SpriteMGR {
   self = [super init];
   if (self != nil) {
   self = [AtlasSprite spriteWithRect:CGRectMake(0, 0, 40, 40) spriteManager: _SpriteMGR];
   _animation = [AtlasAnimation animationWithName:@"bob" delay:0.1f];

   for(int i = 0; i < 3; i++) { //total number of animated frames
   int x = i % 3; //number of total horizontal frames
   int y = i / 3; //number of total vertical frames
   [_animation addFrameWithRect: CGRectMake(x * 40, y * 40, 40, 40) ];
   }

   and in my GameLayer I should be doing this:

   - (id)init {
   self = [super init];
   if (self != nil) {
   isTouchEnabled = YES;
   _enemy = [[[Enemy alloc] initWithObject:@"shroomatlas.png"] autorelease];
   _mgr = [AtlasSpriteManager spriteManagerWithFile:texturepath capacity:9];
   [_mgr setPosition:CGPointMake(120,60)];
   [_mgr addChild: _enemy];
   [self addChild:_mgr z:5];

   Posted 2 years ago #
4. 

   Dan
   Member

   You're passing a string to your enemy class when you should be passing the AtlasSpriteManager (as you have in your Enemy initWithObject method).

   In your GameLayer code you're calling setPosition on the manager, when I believe you want to call it on your enemy. Also, since the whole point of the encapsulation I believe was to try to hide some of the manager calls within the class, you should call [_mgr addChild: self]; in your initWithObject of the Enemy class.

   You also want to call [self addAnimation:_animation]; in your Enemy class after the frames are added.

   -Dan

   Posted 2 years ago #
5. 

   vhalik
   Member

   Thanks Dan, that worked perfectly.

   Posted 2 years ago #

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