cocos2d for iPhone

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

1. 

   indy2005
   Member

   Hi,

   How would you swap the main sprite image after an animation has completed. In certain instances I want the end frame of the animation action to stay in place, and in other instances I want to completely swap out the image behind the sprite after the animation has completed.

   Any advice greatly appreciated....

   Also, any idea how to set a sprites registration point ;-)

   Thanks all

   i

   Posted 2 years ago #
2. 

   ripp
   Member

   The way I do it in my app is to have the sprite I want to swap with off the screen, and when the animation ends I set new coordinates for the off-screen sprite.

   Posted 2 years ago #
3. 

   indy2005
   Member

   Thanks,

   Would this work with 100s of sprites? I was hoping you could call a function at the end of the animation and replace the underlying image in the same sprite...or even go to a specific frame in the animation perhaps which has the image required?

   i

   Posted 2 years ago #
4. 

   badawe
   Member

   You can do this with AtlasSpriteFrame!

   When your animation is over you can send the animation to desired frame you want.

   Posted 2 years ago #
5. 

   indy2005
   Member

   Hi,

   I will investigate..! Thanks for the pointers.

   Regards

   i

   Posted 2 years ago #
6. 

   indy2005
   Member

   ...OK,

   I investigated, but there isn't much documentation on AtlasSpriteFrame I could find, or many examples? Any link to some boilerplate code I can learn from?

   Thanks

   i

   Posted 2 years ago #
7. 

   badawe
   Member

   @indy2005 have many examples of using atlassprite in the cocos2d base. But using AtlasSpriteFrame i didn't noticied yet.

   but is quite simple.

   AtlasSpriteFrame *frame = CGRectMake(0.0, 0.0, 220.0, 130.0)
   [MyAtlasSprite setFrame:frame]

   ;

   i didn't know if is setFrame, but is something like that!

   Posted 2 years ago #
8. 

   indy2005
   Member

   Hi,

   Thanks

   I am using this example code, using an AtlasAnimation to create the frames, and then an animation action. How do I use this method, do I not use actions any more - or use both approaches. i.e. add the frames I want to manually switch to using AtlasSpriteFrames, run my animation action and then use a call back to advance to a specific AtlasSpriteFrame?

   AtlasSpriteManager *mgr = [AtlasSpriteManager spriteManagerWithFile:@"grossini_dance_atlas.png" capacity:50];
   		[self addChild:mgr z:0 tag:kTagSpriteManager];		
   
   		AtlasSprite *sprite = [AtlasSprite spriteWithRect:CGRectMake(0, 0, 85, 121) spriteManager: mgr];
   		AtlasSprite *sprite2 = [AtlasSprite spriteWithRect:CGRectMake(0, 0, 85, 121) spriteManager: mgr];
   		AtlasSprite *sprite3 = [AtlasSprite spriteWithRect:CGRectMake(0, 0, 85, 121) spriteManager: mgr];
   
   		AtlasAnimation *animation = [AtlasAnimation animationWithName:@"dance" delay:0.2f];
   		for(int i=0;i< 14;i++) { // there are 14 images in this sprite sheet, each sprite is in a box 85 pixels wide and 121 pixels tall
   			int x= i % 5;
   			int y= i / 5;
   			[animation addFrameWithRect: CGRectMake(x*85, y*121, 85, 121) ];
   
   		}
   
   		[mgr addChild:sprite];
   		[mgr addChild:sprite2];
   		[mgr addChild:sprite3];
   
   		CGSize s = [[Director sharedDirector] winSize];
   		sprite.position = ccp( s.width /2, s.height/2);
   		sprite2.position = ccp( s.width /2 - 100, s.height/2);
   		sprite3.position = ccp( s.width /2 + 100, s.height/2);
   
   		id action = [Animate actionWithAnimation: animation];
   		id action2 = [[action copy] autorelease];
   		id action3 = [[action copy] autorelease];
   
   		sprite.scale = 0.5f;
   		sprite2.scale = 1.0f;
   		sprite3.scale = 1.5f;
   
   		[sprite runAction:action];
   		[sprite2 runAction:action2];
   		[sprite3 runAction:action3];

   Posted 2 years ago #
9. 

   badawe
   Member

   If you want swap you image at the end of your Action, you have to completly remove the AtlasSprite at callback of your sprite.

   like:
   

   AtlasSprite *newAtlasSprite = [AtlasSprite spriteWithRect:CGRectMake(0, 0, 85, 121) spriteManager: mgr];
   [newAtlasSprite setPosition:sprite.position];
   [mgr addChild:newAtlasSprite];
   [[mgr removeChild:sprite]];

   if you wanna send the AtlasSprite to some frame:
   

   AtlasSpriteFrame *frame = CGRectMake(0.0, 0.0, 220.0, 130.0)
   [MyAtlasSprite setFrame:frame];

   i without MacOS here to post the right answer, but look the documentation for:
   Action Callback
   AtlasSpriteFrame

   Posted 2 years ago #
10. 

    PhilM
    Member

    I think you can do it without removing the sprite.

    something like

    [sprite setTextureRect:CGRectMake(0, 0, 85, 121)].... (or similar, not on my mac so can't check right now)

    Posted 2 years ago #
11. 

    indy2005
    Member

    Hi,

    Thanks. I did it like this:

    -(void) openWindow
    {
    	if ([self.windowState isEqualToString:  @"WindowClosed"])
    	{
    
    		self.windowState =  @"WindowOpening";
    		Action *actionCallFunc = [CallFunc actionWithTarget:self selector:@selector(setWindowStateToOpen)];
    
                   //getActionOpen returns an animation action - once the animation is finished - update the state using the callback and change the animation frame
    		Sequence *actions = [Sequence actions: [self getActionOpen], actionCallFunc, nil];
    
    		[self runAction: actions];
    
    		//[actionCallFunc release];  Cant release...not sure how or if I should as it is being scheduled I imagine
    		//[actions release];  Cant release...not sure how or if I should
    
    	}
    }
    
    -(void) setWindowStateToOpen
    {
    	NSLog(@"CallFunc at end of action setting window state to open");
    	self.windowState = @"WindowOpen";
    
    	[self setDisplayFrame: openFrame];
    
    	}

    Posted 2 years ago #
12. 

    indy2005
    Member

    ...not sure if you can answer my question in the code..how do you handle the release of Sequence *actions and Action *actionCallFunc objects created as local instance variables to the openWindow method. I imagine they live beyond the instance method as they are needed beyond the methods execution (releasing them crashes!)

    thanks

    i

    Posted 2 years ago #

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