Smooth 2 axis look at?

Unity Engine
1

I have a turret object which is made of several parts, one rotates left and right, the other rotates up and down and is also a child of the left/right object. The turrets are attached to objects that move around, this is the only script I found that allows them to look at a target correctly without being completely misaligned:

public Transform horizontalAxis;
public Transform verticalAxis;
private Transform currentTarget;

private void RotateTurret(){
    Vector3 targetDir = verticalAxis.InverseTransformPoint (currentTarget.position);
    targetDir.y = 0;
    targetDir = verticalAxis.TransformPoint (targetDir);
    verticalAxis.LookAt (targetDir, verticalAxis.up);
    horizontalAxis.LookAt (currentTarget, horizontalAxis.up);
}

The only issue is that they snap to the target immediately, my goal here is to make the turret smoothly turn towards the target using Quaternion.Slerp for example. I tried implementing a Slerp/Lerp into the rotate method but it seemed to break everything.

Any ideas how I can smoothly turn towards the turrets target?

2

You shoud use Lerp or Slerp function for calculating rotation, and then you neec to assing cxalculated value to transform object.
Look at similar post here - transform.LookAt or Quaternion.LookRotation on 1 axis only? - Unity Engine - Unity Discussions