UNITY 旋转查看物体

PC端：

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using UnityEngine; using System.Collections;    public class DragRound : MonoBehaviour {        public Transform obj;     public float speed = 2;           private bool _mouseDown = false;           void Update ()     {         if (Input.GetMouseButtonDown(0))             _mouseDown = true;         else if (Input.GetMouseButtonUp(0))             _mouseDown = false;           if (_mouseDown)         {             float fMouseX = Input.GetAxis("Mouse X");             float fMouseY = Input.GetAxis("Mouse Y");             obj.Rotate(Vector3.up, -fMouseX * speed, Space.World);             obj.Rotate(Vector3.right, fMouseY * speed, Space.World);         }     } }

手机端：

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using UnityEngine; using System.Collections;    public class DragRoundPhone : MonoBehaviour {        private Vector3 startFingerPos;     private Vector3 nowFingerPos;     private float xMoveDistance;     private float yMoveDistance;     private int backValue = 0;     public GameObject obj;     void Update()     {         if (Input.touchCount <= 0)         {             return;         }            if (Input.GetTouch(0).phase == TouchPhase.Began)         {             //Debug.Log("======开始触摸=====");              startFingerPos = Input.GetTouch(0).position;         }            nowFingerPos = Input.GetTouch(0).position;            if ((Input.GetTouch(0).phase == TouchPhase.Stationary) || (Input.GetTouch(0).phase == TouchPhase.Ended))         {             startFingerPos = nowFingerPos;             //Debug.Log("======释放触摸=====");              return;         }         //          if (Input.GetTouch(0).phase == TouchPhase.Ended) {          //                        //          }          if (startFingerPos == nowFingerPos)         {             return;         }         xMoveDistance = Mathf.Abs(nowFingerPos.x - startFingerPos.x);         yMoveDistance = Mathf.Abs(nowFingerPos.y - startFingerPos.y);            if (xMoveDistance > yMoveDistance)         {             if (nowFingerPos.x - startFingerPos.x > 0)             {                 //Debug.Log("=======沿着X轴负方向移动=====");                  backValue = -1; //沿着X轴负方向移动              }             else             {                 //Debug.Log("=======沿着X轴正方向移动=====");                  backValue = 1; //沿着X轴正方向移动              }         }         else         {             if (nowFingerPos.y - startFingerPos.y > 0)             {                 //Debug.Log("=======沿着Y轴正方向移动=====");                  backValue = 2; //沿着Y轴正方向移动              }             else             {                 //Debug.Log("=======沿着Y轴负方向移动=====");                  backValue = -2; //沿着Y轴负方向移动              }            }         if (backValue == -1)         {             obj.transform.Rotate(Vector3.up * -1 * Time.deltaTime * 50, Space.World);         }         else if (backValue == 1)         {             obj.transform.Rotate(Vector3.up * Time.deltaTime * 50, Space.World);         }         else if (backValue == 2)         {             obj.transform.Rotate(Vector3.right * Time.deltaTime * 50, Space.World);         }         else if (backValue == -2)         {             obj.transform.Rotate(Vector3.right * -1 * Time.deltaTime * 50, Space.World);         }         }  }