no setOpacity on CC3Billboard ? « cocos2d for iPhone

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no setOpacity on CC3Billboard ?

(3 posts) (2 voices)

Started 1 year ago by horseshoe7
Latest reply from horseshoe7

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horseshoe7
Member
I looked into the code and noticed that setting opacity on a CC3Billboard node won't set the opacity of its CCNode *billboard object.

I even implemented that method in CC3Billboard like this:
```
-(void) setOpacity: (GLubyte) opacity {

	if ([billboard isKindOfClass:[CCSprite class]]) {
		[billboard setOpacity: opacity];
	}
	[super setOpacity:opacity];
}
```
being sure that when I create my CC3Billboard object, I use a CCSprite. In my case I use a sprite with a 1x1 transparent pixel, and use that as a root node, then add children (CCSprite or CCLabelTTF) to it.

The problem is, nothing happens. The opacity is not changed! Any ideas ?
Posted 1 year ago #
Bill Hollings
Moderator
@horseshoe7

Thanks for pointing out the missing functionality. We'll add that for the next release.

I don't know why your implementation is not working. In CC3DemoMashUp, if I add the following line to the addProjectedLabel method:
```
bbLabel.opacity = 100;
```
The text label does in fact appear translucent.

Have you tried tracing your code to make sure that the isKindOfClass: is doing what you expect? And does your sprite class really do something with the setOpacity: method? What happens when you try setting the opacity of your sprite directly and then adding it to the CC3Billboard (as I did above)?

...Bill
Posted 1 year ago #
horseshoe7
Member

Very strange. I did a trace, the CCSprite object gets its opacity set to 100, and yet it doesn't appear that way. the CCSprite object I'm using is a CCLabelTTF.

So your suggestion was good. set it directly and then add it. That didn't work.

I thought setting opacity of a CCSprite (CCRGBAProtocol object) will also set the opacity of all the children. Can anyone confirm? The API docs don't say much.

It's the children I'm trying to change on the fly...

Posted 1 year ago #

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