Look At Monobehaviour for camera in cinematic or cut scene

SC_PlayerCameraCutScene.cs

using UnityEngine;
using System.Collections;

public class SC_PlayerCameraCutScene : MonoBehaviour
{
	#region Static
	
	// CONST
	private const float lerpLookAtSpeedOn = 1f;
	private const float lerpLookAtSpeedOff = 1f;
	
	private const float lerpPositionSpeedOn = 4f;
	private const float lerpPositionSpeedOff = 4f;
	
	// SINGLETON
	private static SC_PlayerCameraCutScene _instance;
	
	// target look at
	private static Transform _T_targetLookAt;
	private static Vector3 _V3_smoothTargetLookAt = Vector3.forward;
	
	// target position
	private static Transform _T_targetPosition;
	private static Vector3 _V3_smoothTargetPosition = Vector3.zero;
	
	public static bool IS_ACTIVE{get{return (IS_ACTIVE_LOOK_AT || IS_ACTIVE_POSITION);}}
	
	public static bool IS_ACTIVE_LOOK_AT{get{return _T_targetLookAt != null;}}
	
	public static bool IS_ACTIVE_POSITION{get{return _T_targetPosition != null;}}
	
	public static void Reset(){SetLookAt(null);}
	
	public static void SetLookAt(Transform _T_newTarget)
	{
		if(_T_newTarget != _T_targetLookAt)
		{
			// set new target
			_T_targetLookAt = _T_newTarget;
			
			// reset position look at
			_V3_smoothTargetLookAt = _instance.transform.TransformPoint(Vector3.forward * 10f);
		}
		
	}// SetLookAt()
	
	public static void SetTargetPosition(Transform _T_newTarget)
	{
		if(_T_newTarget != _T_targetPosition)
		{
			// set target
			_T_targetPosition = _T_newTarget;
			
			// save current position
			_V3_smoothTargetPosition = _instance.transform.position;
		}
		
	}// SetTargetPosition()
	
	#endregion
	
	#region Dynamic
	
	
	private void Awake()
	{
		_instance = this;
		
	}// Awake()
	
	
	private void LateUpdate()
	{
		// look at ?
		if(IS_ACTIVE_LOOK_AT)
		{
			// lerp
			_V3_smoothTargetLookAt = Vector3.Lerp(_V3_smoothTargetLookAt, _T_targetLookAt.position, TimeManager.DELTA_TIME * lerpLookAtSpeedOn);
			
			// apply
			transform.LookAt(_V3_smoothTargetLookAt);
		}
		else
		{
			//Reset rotation
			transform.localRotation = Quaternion.Slerp(transform.localRotation, Quaternion.identity, TimeManager.DELTA_TIME * lerpLookAtSpeedOff);
		}
		
		// move at ?
		if(IS_ACTIVE_POSITION)
		{
			// lerp
			_V3_smoothTargetPosition = Vector3.Lerp(_V3_smoothTargetPosition, _T_targetPosition.position, TimeManager.DELTA_TIME * lerpPositionSpeedOn);
			
			// apply
			transform.position = _V3_smoothTargetPosition;
		}
		else
		{
			// reset position
			transform.localPosition = Vector3.Lerp(transform.localPosition, Vector3.zero, TimeManager.DELTA_TIME * lerpPositionSpeedOff);
		}
		
	}// LateUpdate
	
	#endregion
	
}// SC_PlayerCameraCutScene : MonoBehaviour