Need help getting Enemy AI to follow player about apecs HOT 2 OPEN

There's nothing apecs-specific. And it is much cleaner with vector types. Get a direction vector between your two points and scale it by desired velocity. Add to the original position:

move velocity current target = current + normalize (current - target) ^* velocity

from apecs.

@dpwiz is right, you're doing a lot of vector math manually that a library like linear will allow you to express as vector math directly. That part isn't really apecs-specific.

Where apecs comes in is when you express that operation as a cmap over enemy positions.
The easiest thing is just to have a global step function that's called once per frame, and part of that step function is the logic above.
Some ECS libraries want you to get fancy with it and model each of these behaviors as if they ran on a separate dedicated thread, but for now that's completely unnecessary.

from apecs.