Facing objects

public float maxSpeed;
public float maxAccel;
public float maxRotation;
public float maxAngularAccel;

public float MapToRange (float rotation) {
    rotation %= 360.0f;
    if (Mathf.Abs(rotation) > 180.0f) {
        if (rotation < 0.0f)
            rotation += 360.0f;
        else
            rotation -= 360.0f;
    }
    return rotation;
}

using UnityEngine;
using System.Collections;

public class Align : AgentBehaviour
{
    public float targetRadius;
    public float slowRadius;
    public float timeToTarget = 0.1f;

    public override Steering GetSteering()
    {
        Steering steering = new Steering();
        float targetOrientation = target.GetComponent<Agent>().orientation;
        float rotation = targetOrientation - agent.orientation;
        rotation = MapToRange(rotation);
        float rotationSize = Mathf.Abs(rotation);
        if (rotationSize < targetRadius)
            return steering;
        float targetRotation;
        if (rotationSize > slowRadius)
            targetRotation = agent.maxRotation;
        else
            targetRotation = agent.maxRotation * rotationSize / slowRadius;
        targetRotation *= rotation / rotationSize;
        steering.angular = targetRotation - agent.rotation;
        steering.angular /= timeToTarget;
        float angularAccel = Mathf.Abs(steering.angular);
        if (angularAccel > agent.maxAngularAccel)
        {
            steering.angular /= angularAccel;
            steering.angular *= agent.maxAngularAccel;
        }
        return steering;
    }
}

using UnityEngine;
using System.Collections;

public class Face : Align
{
    protected GameObject targetAux;
}

public override void Awake()
{
    base.Awake();
    targetAux = target;
    target = new GameObject();
    target.AddComponent<Agent>();
}

void OnDestroy ()
{
    Destroy(target);
}

public override Steering GetSteering()
{
    Vector3 direction = targetAux.transform.position - transform.position;
    if (direction.magnitude > 0.0f)
    {
        float targetOrientation = Mathf.Atan2(direction.x, direction.z);
        targetOrientation *= Mathf.Rad2Deg;
        target.GetComponent<Agent>().orientation = targetOrientation;
    }
    return base.GetSteering();
}