Atan2 problem

BlitzMax Forums/BlitzMax Programming/Atan2 problem

Hi,

I have up to 200 enemies who need to rotate to point in the direction they are travelling.

This game is targetted to run on a P2-450 and above, therefore would Atan2 be very expensive?

Are there alternatives to finding the rotation based on 2 coordinates, or failing that, I am able to provide a movement vector vx,vy.