cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   plugisto
   Member

   hello,
   layer and opacity are not good friends. is this right?
   isn't it possible to set opacity for a layer to e.g. 50, 60. (the same way i do with a sprite.)?

   when i try this:
   id go = [FadeOut actionWithDuration:.5];
   [introLayer runAction: go];

   i get this message:
   *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[IntroLayer setOpacity:]: unrecognized selector sent to instance 0xe8d2d0'

   i am using version 0.8.

   thanks.
   eugen

   Posted 2 years ago #
2. 

   Codemattic
   Moderator

   It looks like you will have to subclass Layer and add the opacity protocol and make a method -setOpacity: that sets the opacity of its children.

   Posted 2 years ago #
3. 

   plugisto
   Member

   ok, thanks.

   layer is a subclass of cocosnode. cocosnode has opacity built in.
   so i thought layer could be able to be semi-transparent.

   best,
   eugen

   Posted 2 years ago #
4. 

   friken
   Member

   I'm trying to do the same to fadeout an AtlasSpriteManager or the whole layer it is attached to and get the same error. Any idea why this doesn't work since a layer does have opacity built in?

   Posted 2 years ago #
5. 

   riq
   Key Master

   Layer and CocosNode don't support the CocosNodeRGBA protocol.
   But ColorLayer does.

   http://www.cocos2d-iphone.org/api-ref/0.8/protocol_cocos_node_r_g_b_a-p.html

   Posted 2 years ago #
6. 

   friken
   Member

   Thanks. I'll use ColorLayer. As a workaround before I read this I am doing a fadeout on 5 sprites then moving the sprites, then doing a setopacity on all. I'm seeing a very strange result. Of 5 sprites all getting setopacity called a seemingly random # of them every time I run it never show up again after setopacity:255

   here is the code, seems simple enough:

   
[as runAction: [Sequence actions: [FadeIn actionWithDuration:0.5], [CallFuncND actionWithTarget:self selector:@selector(DoorDoneOpen:data:) data:as], nil]];

   //Fade Klunk
[k.asHead runAction:[FadeOut actionWithDuration:0.5]];
[k.asArm runAction:[FadeOut actionWithDuration:0.5]];
[k.asBody runAction:[FadeOut actionWithDuration:0.5]];
[k.asFFoot runAction:[FadeOut actionWithDuration:0.5]];
[k.asBFoot runAction:[FadeOut actionWithDuration:0.5]];


   Then the callback func:
   
//Fade Klunk Back In
[klunkTouched.asHead setOpacity:255];
[klunkTouched.asArm setOpacity:255];
[klunkTouched.asBody setOpacity:255];
[klunkTouched.asFFoot setOpacity:255];
[klunkTouched.asBFoot setOpacity:255];


   Posted 2 years ago #
7. 

   friken
   Member

   hmmm.. I fixed the issue by ensuring the character Fadeout has a duration lower than the callbackfunc. I guess the callback was getting hit slightly before the character fadeout was completed.

   Posted 2 years ago #
8. 

   Tough Guy
   Member

   @riq If you could please put some sample code to insert a colorlayer and add a sprite into it. I've been searching it for a while. Thanks in advance.

   Posted 6 days ago #

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