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setOpacity on parent doesn't affect the opacity on children #628

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fleet-studio opened this Issue Nov 10, 2012 · 2 comments

3 participants

@fleet-studio

For example, if you have this scenario:

var child = cc.Sprite.create("res/child_texture.png");
child.setOpacity( 0.5 * 255)
child.setPosition( cc.p( 100, 100 ) );

var parent = cc.Sprite.create("res/parent_texture.png");
parent.setOpacity( 0.5 * 255 );
parent.addChild( child );

You got both the parent and his child with its texture at 50% alpha, is this an expected behaviour?
Shouldn't be parent at 50% alpha and his child at 25% alpha? Isn't opacity relative to ancestors?

@fleet-studio

If your run this code it looks like a bug:

parent.runAction( cc.FadeOut.create( 1 ) );

You'll see the parent disappearing and the child visible, with his opacity untouched...

@dingpinglv

No, opacity of child sprite is standalone to his parent.

Only position property is relative to parent sprite in cocos2d.

@linshun linshun closed this Feb 25, 2013
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