title: Flight game AI algorithm?
body: <p>Greetings all,</p>
  
  <p>I am in the designing phase of one of my hobby project.I am going to develop an 3D air-combat game . (inspired by HAWX).
  But I am wondering how the AI works for enemy crafts ? I guess ,they do not move along a path (path finding on a graph)as in FPS games .
  What kind of algorithms can I use for enemy craft movement?
  Are there any AI libraries I can use for this?</p>
  
  <p>Note: I use irrlicht engine,C++ as my  development environment.</p>