I am trying to write an addon for a videogame which will give the best orientation/heading to intercept a target. The best would mean the fastest route to a moving target. There is no acceleration in the game. I can get the speed/velocity of the target and player, as well as their coordinates and orientation/heading in three dimensions. For the most part I will only need to use the XY plane, but there are some instances where being able to figure in pitch would be handy. -- The problem is I am not very adept with math or physics. I've tried to find a formula, but haven't had much luck. Can anyone help me out?