title: cocos2d sprite collision
body: <p>I have an Array of CCSprites that being displayed all at once.
  Every sprite has a movement path, a movement path is a random point on screen.</p>
  
  <p>All the sprites are moving all at once to random points on screen.</p>
  
  <p>What I want to do is to detect collision between the sprites and then change their movement path.</p>
  
  <p>Is it possible? </p>