unity游戏相机跟随效果

public class CameraFollow : MonoBehaviour     {         public Transform target;            // The position that that camera will be following.         public float smoothing = 5f;        // The speed with which the camera will be following.         Vector3 offset;                     // The initial offset from the target.         void Start ()         {             // Calculate the initial offset.             offset = transform.position - target.position;         }         void FixedUpdate ()         {             // Create a postion the camera is aiming for based on the offset from the target.             Vector3 targetCamPos = target.position + offset;             // Smoothly interpolate between the camera's current position and it's target position.             transform.position = Vector3.Lerp (transform.position, targetCamPos, smoothing * Time.deltaTime);         }     }