A fast, easy to use, free, and community supported 2D game engine
geraldtjy
Member
Hi,
I was wondering if there was a simple way to make the sprites flash repeatedly? Something like what running the action CCBlink does but with instead of disappearing, it should 'light up' instead.
I don't see such an action available, but I do think it would be useful feature for the future. I doubt the implementation would be very different from CCBlink.
Anyway, I'm new to this but I'm really liking cocos2d so far, so thanks for that! :)
I'm pretty new as well so this may be the hard way, but I think you can animate something like that using CCAnimation. Have a spritesheet with the regular image and the alternative blink/strobe version of that image. Then you can animate the blinking sequence. There is a very good example of this in the sprite_test that came with Cocos2d. The flying dragon one.
bradparks
Member
while not an action, this post seems to post a solution to making a sprite "flash".
http://www.cocos2d-iphone.org/forum/topic/4363#post-26192
this post as well:
http://www.cocos2d-iphone.org/forum/topic/5192#post-34152
should be pretty easy to put that into a CCFlash type action
geraldtjy
Member
Thanks guys! Yeah, I figured that a 'flashing' version of the spritesheet would be the manual way of doing it, but would probably be a lot more effort than necessary.
After reading the other posts, the quick and dirty way I did it was to:
-Create and place the same sprite above the one that is supposed to flash
-Call setBlendFunc:(ccBlendFunc){GL_SRC_ALPHA, GL_ONE} on the sprite
-Run action CCBlink on the sprite
That way, the sprite that is 'lit-up' will blink, giving the impression that the sprite below is flashing. It's not exactly ideal but it'll suit my purpose just fine.
Thanks again!
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