I tried this all, didn't work. I also tried while(1). No success as I thought. You see, the hitbox WORKS (therefore aligning to the head) when turning or moving. However, somehow, the same thing doesn't work for animation - the hitbox remains at the head's normal location while the enemy dies.

do you remove the model somewhere? maybe it jumps out of the "while(you)" function.

Hmmm... As part of debugging, I tried it with another model. It turns out the problem is not with my coding (as usual ). Instead it is with the "enemy" model which somehow plays the animation but doesn't update the vertexes. Well, thanks for trying to help at least.

Edit: Silly me. I created the vertexes myself, and therefore they don't change naturally during an animation.

Yeah as I said,they were probably not attached to the main body
Lets make a game where players have to snipe one vertice