This seems like it should be simple, but I've been struggling with it for a while.
I have a starship that has an associated ODE body. I'm trying to get the starship to follow a path. So I calculate the desired heading as a vector.
The problem is I need to find the angular force to apply (as a vector) to rotate the ship from its current heading (forward vector) to face the desired heading.
Could someone explain how to calculate that angular force?