Unity 控制相机绕物体的旋转

鼠标右键控制视角移动，滚轮控制视角远近。

public class FollowPlayer : MonoBehaviour

{
    public float distance = 0;

    private Transform player;
    private Vector3 offset;
    private float scrollSpeed = 5;

    private bool isRotating = false;

    // Use this for initialization
    void Start()
    {
        player = GameObject.FindGameObjectWithTag(Tags.player).transform;
        transform.LookAt(player);
        offset = transform.position - player.position;
    }


    // Update is called once per frame
    void Update()
    {
        transform.position = player.position + offset;
        RotateView();
        ScrollView();
   
    }


    void ScrollView()
    {
        distance = offset.magnitude;
        distance -= Input.GetAxis("Mouse ScrollWheel") * scrollSpeed;
        distance = Mathf.Clamp(distance, 5, 18);
        offset = offset.normalized * distance;
    }


    void RotateView()
    {
        if (Input.GetMouseButtonDown(1))
        {
            isRotating = true;
        }


        if (Input.GetMouseButtonUp(1))
        {
            isRotating = false;
        }


        if (isRotating)
        {
            Vector3 originalPos = transform.position;
            Quaternion originalRotation = transform.rotation;

            transform.RotateAround(player.position, player.up, Input.GetAxis("Mouse X"));
            transform.RotateAround(player.position, transform.right, -Input.GetAxis("Mouse Y"));
            // 影响了position和rotation

   //限制视角上下移动的范围
            float x = transform.eulerAngles.x;
            if (x < 10 || x > 80)
            {
                transform.position = originalPos;
                transform.rotation = originalRotation;
            }
        }

        offset = transform.position - player.position;
    }
}