Question

I am newbie programmer in cocos2D…. I wanted to create the Endless Background using the Parallax Scrolling.. I am trying to learn the Parallax but it doesn’t update with the time and sprites doesn’t keep on rotating from top to bottom! The snippet i tried is as below

-(id) init 
{
    if((self = [super init])) 
    {        
        CGSize wSize = [CCDirector sharedDirector].winSize;
        self.isTouchEnabled = YES;
        CGPoint topOffset = CGPointMake(wSize.width, 0); 
        CGPoint midOffset = CGPointMake(wSize.width/2,0);
        CGPoint downOffset = CGPointZero;        
        CCSprite *para1 = [CCSprite spriteWithFile:@"Default.png"];
        CCSprite *para2 = [CCSprite spriteWithFile:@"Icon.png"];
        CCSprite *para3 = [CCSprite spriteWithFile:@"Default.png"];
        CCSprite *para4 = [CCSprite spriteWithFile:@"Icon.png"];

        paraNode = [CCParallaxNode node];
        [paraNode addChild:para1 z:1 parallaxRatio:CGPointMake(0.5f, 0)
        positionOffset:topOffset];
        [paraNode addChild:para2 z:2 parallaxRatio:CGPointMake(1, 0) positionOffset:topOffset];
        [paraNode addChild:para3 z:4 parallaxRatio:CGPointMake(2, 0) positionOffset:midOffset];
        [paraNode addChild:para4 z:3 parallaxRatio:CGPointMake(3, 0) positionOffset:downOffset];
        [self addChild:paraNode z:0 ];
        [self scheduleUpdate];
     }
     return self;
}

-(void) update : (ccTime) dt
{   
//Need to move the Parallax Node with the repetition of the background
}

This is the Implementation file… I am stuck here for moving the contiunous moving of the background in the Horizontal or Portrait mode.

Thanks for the Help in Advance

Answer 1

CCParallaxNode doesn’t support endless scrolling, unless you modify its code. I have an example for endless parallax scrolling in my Learn Cocos2D book. From that link you can also download the book’s source code where you’ll find the parallax class in chapters 6 to 8.