Unity3D实现控制摄像机移动

using System.Collections;using System.Collections.Generic;using UnityEngine; //巡游模式摄像机控制public class CameraMove : MonoBehaviour{  public static CameraMove Instance = null;  private Vector3 dirVector3; private Vector3 rotaVector3; private float paramater = 0.1f; //旋转参数 private float xspeed = -0.05f; private float yspeed = 0.1f;  private float dis;  void Awake () {  Instance = this; }  private void Start() {  rotaVector3 = transform.localEulerAngles; dis = UIFuc.Instance.Dis; }  // Update is called once per frame void FixedUpdate () {  //旋转  if (Input.GetMouseButton(1))  {   rotaVector3.y += Input.GetAxis("Horizontal") * yspeed;   rotaVector3.x += Input.GetAxis("Vertical") * xspeed;   transform.rotation = Quaternion.Euler(rotaVector3);  }   //移动  dirVector3 =Vector3.zero;   if (Input.GetKey(KeyCode.W))  {   if(Input.GetKey(KeyCode.LeftShift)) dirVector3.z = 3;   else dirVector3.z = 1;  }  if (Input.GetKey(KeyCode.S))  {   if (Input.GetKey(KeyCode.LeftShift)) dirVector3.z = -3;   else dirVector3.z = -1;  }  if (Input.GetKey(KeyCode.A))  {   if (Input.GetKey(KeyCode.LeftShift)) dirVector3.x = -3;   else dirVector3.x = -1;  }  if (Input.GetKey(KeyCode.D))  {   if (Input.GetKey(KeyCode.LeftShift)) dirVector3.x = 3;   else dirVector3.x = 1;  }  if (Input.GetKey(KeyCode.Q))  {   if (Input.GetKey(KeyCode.LeftShift)) dirVector3.y = -3;   else dirVector3.y = -1;  }  if (Input.GetKey(KeyCode.E))  {   if (Input.GetKey(KeyCode.LeftShift)) dirVector3.y = 3;   else dirVector3.y = 1;  }  transform.Translate(dirVector3 * paramater,Space.Self);  //限制摄像机范围 transform.position = Vector3.ClampMagnitude(transform.position, dis); }}