title: Moving a sprite using a complex mathematical path in AndEngine
body: <p>I'm new to AndEngine programming. I want to move a sprite recreating a complex animation before the user can interact with it.
  The initial movement of the sprite is not so linear and not so simple. I want to apply a complex Mathematical algorithm to the coordinates of the moving sprite.
  How can I achieve this ? Which existing functions can I use in AndEngine ?</p>