Change ParallaxRatio and PositionOffset ?

(4 posts) (4 voices)

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parsa28
Member

Hello there, is it possible to modify a node's ParallaxRatio and PositionOffset after it's added to a ParallaxNode?
Thanks in advance

Posted 2 years ago #
Lam
Member

The best approach is to remove the child and re-add it with the new ratio/offset

Posted 2 years ago #
adik
Member

ParallaxNode has a property called parallaxArray. It contains all objects (with their offsets and ratios) that were added to parallaxNode. You can retrieve object you want from that array and modify its ratio/offset values.

-- from ParallaxNode.h --
/** array that holds the offset / ratio of the children */
@property (nonatomic,readwrite) ccArray * parallaxArray;

Posted 2 years ago #
onedayitwillmake
Member
I created a wrapper function that went like this:
```
-(void) modifyChildRatio:(CocosNode*)child newRatio:(CGPoint)newRatio;
{
	for(unsigned int i=0; i < parallaxArray_->num; i++ ) {

		CGPointObject *point = parallaxArray_->arr[i];
		//NSLog(@"Checking %@", point.child);

		// Found it, modify its ratio
		if(point.child == child)
		{
			point.ratio = newRatio;
		}
	}
}
```
However when it was called, it messed up all the positions - I ended up discarding this function, and just working around it some other way, but just a heads up.
I think you'd have to modify the offset once the ratio is modified, but like I said i gave up this route and went another way.
Posted 2 years ago #

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