A little coding help please?

Hey guys I'm embarrassed a little to ask but I'm really stuck and don't know what else to do. I've just created my first game using Cocos2D. It's completely done except I can't get the background to scroll giving the illusion of depth/movement. It's a very simple game so there isn't much code - it's my first after all.

I've spent a week solid every night after my kids/wife are in bed and I am frustrated beyond belief. I'm hoping there's some kind soul who I can share a stripped down version of my project with who might be able to look at it and let me know what I'm doing wrong.

Thanks in advance to anyone that might offer to help out.

 

Hi Multihead, thanks for the reply.

Basically it's a static 320x480 image that I'm trying to slide down the screen and once it leaves the bottom of the screen to be redrawn and repeat the same movement again from above.

Something like this:
http://www.youtube.com/watch?v=o5tH1P6cv8Q

I initially wanted to add clouds too but I need to get over this hurdle first.

Here's the code I'm trying to get my background to move. A stripped down but completely runnable project is here if that helps more. I'm stuck and even thought about changing my game mechanics to not require any moving background.

Code:

//***********  This is code I'm trying to get the background to move
		

		
		// Background
		backgroundSprite = [CCSprite spriteWithFile:@"Background.png"
											   rect:CGRectMake(0.0f, 0.0f, 
															   320.0f, 480.0f)];
		ccTexParams params = {GL_LINEAR,GL_LINEAR,GL_REPEAT,GL_REPEAT};
		[backgroundSprite.texture setTexParameters:&params];
		backgroundSprite.anchorPoint = CGPointZero;
		[self addChild:backgroundSprite z:-5];

		CGPoint newPosition = ccp(self.position.x, self.position.y - 0.0f);
		[self  runAction:[CCSequence actions:
						  [CCMoveTo actionWithDuration:2.0f position:newPosition],
						  nil]];

		
		CCLOG(@"Moved Layer to X: %f, Y: %f",
			  self.position.x, self.position.y);

 

Thanks guys, I tried changing the -y and it moves down one whole screen but isn't actually on its own layer as it moves everything.

I did try changing my background image to a texture with a multiple of 2 but that didn't change anything.

Thanks for the advice so far guys, I'm close...

 

Thanks Jared! I really appreciate the help. Just for kicks and to get this working, I changed my background sprite to 128x512 to try it to no avail. As for the code I have now changed it to this:

Code:

		// Background
		backgroundSprite = [CCSprite spriteWithFile:@"Background.png"
											   rect:CGRectMake(0.0f, 0.0f, 
															   320.0f, 480.0f)];
		ccTexParams params = {GL_LINEAR,GL_LINEAR,GL_REPEAT,GL_REPEAT};
		[backgroundSprite.texture setTexParameters:&params];
		backgroundSprite.anchorPoint = CGPointZero;
		[self addChild:backgroundSprite z:-5];

		CGPoint newPosition = ccp(self.position.x, self.position.y - 480.0f);
		[backgroundSprite runAction:[CCSequence actions:
						  [CCMoveTo actionWithDuration:2.0f position:newPosition],
						  nil]];

		
		CCLOG(@"Moved Layer to X: %f, Y: %f",
		  self.position.x, self.position.y);

Yet when I reference the backgroundSprite instead of self then no movement happens. I know it's something stupid that I'm not seeing.