Introducing steering behaviors

Steering behaviors are a force-based approach to navigation toward, or away from, specific points while avoiding obstacles. It was originally discussed in a presentation by Craig Reynolds (the Boids guy) at the Game Developer's Conference (GDC) in 1999, and the original paper discussing steering behaviors can be found online at https://www.red3d.com/cwr/steer/gdc99/. Unlike pathfinding algorithms such as the A* or Dijkstra's algorithms, steering behaviors are tactical in nature. They involve a goal position and forces drawing the autonomous agent toward its goal, while simultaneously pushing the agent away from obstacles you would like it to avoid. In the case of our game, the enemy spaceship is our autonomous agent that will be using the steering behaviors. It will be in pursuit of the player spaceship while avoiding obstacles including...