Hi all,
I created an example showing how to use “pixel perfect collision detect”, which was implemented only with object-c version.
The source code can be reached via [[https://github.com/seetime/PixelPerfectCollision]] and the original discussions on the “Pixel perfect collision detection” can be founded here [[http://www.cocos2d-iphone.org/forum/topic/18522/page/4]].