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POCocos2D vertically scrolling background
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5474300
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6231489
AnswerCount
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CreationDate
2011-03-29T14:38:12.500
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2013-04-26T18:41:23.413
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text
Body
I have three images (320x480) that I'm trying to scroll vertically in my Cocos2D application. In my initialization method, I have the following: <pre><code>//adding background sprites background = [CCSprite spriteWithFile:@"BG1.png"]; background2 = [CCSprite spriteWithFile:@"BG2.png"]; //position background sprites background.position = ccp(size.width, size.height/2); background2.position = ccp(size.width, size.height*2); //schedule to move background sprites [self schedule:@selector(scroll:)]; //adding them to the main layer [self addChild:background z:0]; [self addChild:background2 z:0]; </code></pre> And here's my scroll method: <pre><code>-(void) scroll:(ccTime)dt { //move 30*dt px vertically background.position = ccp(background.position.x, background.position.y - 30*dt); background2.position = ccp(background2.position.x, background.position.y - 30*dt); //reset offscreen position if (background.position.y < 290) { background.position = ccp(480/2, 480); }else if (background2.position.y < 290) { background2.position = ccp(480/2,480); } } </code></pre> Currently what's happening is my first background image is offset by about a quarter of the screen (horizontally), and it starts a quarter of the way up from the bottom of the screen, but it scrolls down. My second background image doesn't actually spawn, the first image just loops over and over while being offset. Is there any way to make the two images smoothly loop continuously in the background, and how would I incorporate a third image? Also, just a quick side question, is it bad to name objects (I think they're objects) with numbers in their name (ie background2/background3)?
Tags
<xcode><background><scroll><cocos2d-iphone>
Title
Cocos2D vertically scrolling background
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1. PO
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1. PTQuestion
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1. This table or related slice is empty.
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1. USJohn
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1. COLooks to me like background2's y coordinate is too high, so it starts off screen and stays there.
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 POCocos2D vertically scrolling background
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 USlins314159

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