SmoothF

using UnityEngine;
using System.Collections;

public class SmoothFollow : MonoBehaviour {

	public Transform target;
	public float distance;
	public float height;
	public float damping;
	public bool smoothRotation;
	public float rotationDamping;
	public Vector3 cameraOffset;

	void  LateUpdate (){
	    Vector3 wantedPosition = target.TransformPoint (0, height, -distance);
	    transform.position = Vector3.Lerp (transform.position, wantedPosition, Time.deltaTime * damping);

	    if (smoothRotation) {
	        Quaternion wantedRotation = Quaternion.LookRotation(target.position - transform.position, target.up);
	        transform.rotation = Quaternion.Slerp (transform.rotation, wantedRotation, Time.deltaTime * rotationDamping);
	    }

	    else transform.LookAt (target, target.up);
	}

	void Reset () {
		distance = 3.0f;
		height = 3.0f;
		damping = 5.0f;
		smoothRotation = true;
		rotationDamping = 10.0f;
	}
}