unity手势控制、放大缩小、拖拽、滑动。单击

using UnityEngine;using System.Collections;using UnityEngine.EventSystems;using System.Collections.Generic;public class TouchManager_Template : MonoBehaviour{    private TouchManager_Template() { }    private static TouchManager_Template _instance = null;    public static TouchManager_Template Instance    {        get { return _instance; }        set { _instance = value; }    }    private GameObject _curModel;    private Vector3 _ModelScreenPos;    private Vector3 _ModelWorldPos;    private Vector3 _MouseScreenPos;    private Vector3 _Offset;    private bool _Moved;    private bool _Selected;    private float _Scale = 5.0f;    private float _ZoomDifference = 0;    private float _ZoomSpeed = 100f;    private float _ZoomMin = 1.0f;    private float _ZoomMax = 2.0f;    private float _StartAngle;    private float _LastAngle;    private Quaternion _curModelRotation;    private Quaternion q = Quaternion.identity;    private float _TurnAngle;    private float _xMove;    private float _yMove;    public float _UpdateRotate = 220.00f;    private Vector2 _TouchBegan = Vector2.zero;    private Vector2 _TouchEnd = Vector2.zero;    [Header("滑动误差")][Range(0,10)]    public float _DragTolerance = 10.0f;#if UNITY_EDITOR    private float _MoveSpeed = 1.0f;#elif UNITY_ANDROID        private float _MoveSpeed = 2.0f;#elif UNITY_IPHONE            private float _MoveSpeed = 1.0f;#endif    public bool OneFingerRotate = true;    void Awake()    {        _instance = this;    }    void Start()    {        _TurnAngle = 0;        subscribeEvent();        Input.gyro.enabled = true;    }    public static void subscribeEvent()    {    }    public static void UnsubscribeEvent()    {    }    void OnDestroy()    {        UnsubscribeEvent();        Input.gyro.enabled = false;    }    GameObject getClosestObject(Vector3 _MousePos)    {        GameObject _go = null;        List<GameObject> OnCardModelList = new List<GameObject>();        if (OnCardModelList.Count > 0)        {            float _dis = 0;            Vector3 p0 = new Vector3(_MousePos.x, _MousePos.y, 0f);            foreach (var dic in OnCardModelList)            {                GameObject _tempGo = dic;                Vector3 p1 = Camera.main.WorldToScreenPoint(_tempGo.transform.position);                p0.z = p1.z;                float _tempDis = Vector3.Distance(p0, p1);                if (_dis == 0 || _dis > _tempDis)                {                    _dis = _tempDis;                    _go = _tempGo;                }            }        }        else        {        }        return _go;    }    void EXLateUpdate_AR_Touch_Controller()    {#if UNITY_EDITOR        if (Input.GetMouseButtonDown(0))        {            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);            RaycastHit hit;            if (Physics.Raycast(ray, out hit, 10000))            {                _curModel = hit.collider.gameObject;                _ModelScreenPos = Camera.main.WorldToScreenPoint(_curModel.transform.position);                _MouseScreenPos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, _ModelScreenPos.z);                _Offset = _curModel.transform.position - Camera.main.ScreenToWorldPoint(_MouseScreenPos);                _Selected = true;                _Moved = false;                Debug.DrawLine(ray.origin, hit.point, Color.red);            }        }#endif        switch (Input.touchCount)        {            case 1:                {                    Touch touch = Input.GetTouch(0);                    switch (touch.phase)                    {                        case TouchPhase.Began:                            {                                _TouchBegan = touch.position;                                Ray ray = Camera.main.ScreenPointToRay(touch.position);                                RaycastHit hit;                                //Physics.Raycast(ray, out hit, 10000);                                //Debug.DrawLine(ray.origin, hit.point, Color.red);                                if (Physics.Raycast(ray, out hit, 10000))                                {                                    _curModel = hit.collider.gameObject;                                    _ModelScreenPos = Camera.main.WorldToScreenPoint(_curModel.transform.position);                                    _MouseScreenPos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, _ModelScreenPos.z);                                    _Offset = _curModel.transform.position - Camera.main.ScreenToWorldPoint(_MouseScreenPos);                                    _Selected = true;                                    _Moved = false;                                    Debug.DrawLine(ray.origin, hit.point, Color.red);                                }                                else if (OneFingerRotate && !_Selected)                                {                                    _Selected = false;                                    _curModel = getClosestObject(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0));                                    _curModelRotation = _curModel.transform.localRotation;                                    _xMove = 0;                                    _yMove = 0;                                }                            }                            break;                        case TouchPhase.Ended:                            {                                if (_Selected)                                {                                    _TouchEnd = touch.position;                                                                        if (!_Moved||(_DragTolerance > Vector2.Distance(_TouchBegan, _TouchEnd)))                                    {                                    }                                }                                _Selected = false;                                _curModel = null;                            }                            break;                        case TouchPhase.Moved:                            {                                                                if (_curModel != null)                                {                                    if (_Selected && (touch.deltaPosition.x != 0 || touch.deltaPosition.y != 0))                                    {                                        _Moved = true;                                        _MouseScreenPos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, _ModelScreenPos.z);                                        _ModelWorldPos = Camera.main.ScreenToWorldPoint(_MouseScreenPos) + _Offset;                                        _curModel.transform.position = _ModelWorldPos;                                    }                                    else if (OneFingerRotate && _Selected == false && !EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId))                                    {                                        Vector2 touchDeltaPostion = touch.deltaPosition;                                        _xMove += touchDeltaPostion.x * _MoveSpeed;                                        _yMove += touchDeltaPostion.y * _MoveSpeed;                                           q = Quaternion.AngleAxis(-_xMove, Vector3.up);                                        var rotation = Quaternion.Euler(_yMove, _xMove, 0);                                        _curModel.transform.localRotation = rotation;                                        _curModel.transform.localRotation = _curModelRotation * q;//*******************************【改动】                                    }                                }                            }                            break;                    }                }                break;            //双指            case 2:                {                    Touch touch0 = Input.GetTouch(0);                    Touch touch1 = Input.GetTouch(1);                    float _zoomTempDifference;                    if (touch0.phase == TouchPhase.Began || touch1.phase == TouchPhase.Began)                    {                        _curModel = getClosestObject(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0));                        if (_curModel != null)                        {                            _Scale = _curModel.transform.localScale.x;                            _StartAngle = GetAngle(touch0.position, touch1.position);                            _curModelRotation = _curModel.transform.rotation;                        }                        _Selected = false;                    }                    if ((touch0.phase == TouchPhase.Moved || touch1.phase == TouchPhase.Moved) && _curModel != null)                    {                        //缩放                        _zoomTempDifference = (touch0.position - touch1.position).magnitude;                        if (_ZoomDifference == 0)                            _ZoomDifference = _zoomTempDifference;                        _Scale = _Scale - (_ZoomDifference - _zoomTempDifference) / _ZoomSpeed;                        _ZoomDifference = _zoomTempDifference;                        _Scale = Mathf.Clamp(_Scale, _ZoomMin, _ZoomMax);                        _curModel.transform.localScale = new Vector3(_Scale, _Scale, _Scale);                        if (!OneFingerRotate)                        {                            _TurnAngle = GetAngle(touch0.position, touch1.position);                            _LastAngle = _TurnAngle - _StartAngle;                            _LastAngle = _LastAngle * 2.0f;                            q = Quaternion.AngleAxis(-_LastAngle, Vector3.up);                            _curModel.transform.rotation = _curModelRotation * q;                        }                    }                    if (touch0.phase == TouchPhase.Ended || touch1.phase == TouchPhase.Ended)                    {                        _ZoomDifference = 0;                        _curModel = null;                    }                }                break;        }        //if (CartoonPlot.CurrentModel != null && !DefaultTrackableEventHandlerSZQ.b_OnCard)        //{        //    Vector3 gravity = SystemInfo.supportsGyroscope ? Input.gyro.gravity : Input.acceleration;        //    //CartoonPlot.CurrentModel.transform.rotation = Quaternion.Euler(Vector3.right * (Vector3.Angle(Vector3.back, gyro.gravity) - 90)) * Quaternion.Euler(Vector3.up * 220);        //    CartoonPlot.CurrentModel.transform.rotation = Quaternion.Euler(Vector3.right * (Vector3.Angle(Vector3.back, gravity) - 90)) * Quaternion.Euler(Vector3.up * _UpdateRotate);        //}    }    private float ClampAngle(float angle, float min, float max)    {        if (angle < -360)            angle += 360;        if (angle > 360)            angle -= 360;        return Mathf.Clamp(angle, min, max);    }    private float GetAngle(Vector2 pos1, Vector2 pos2)    {        Vector2 from = pos2 - pos1;        Vector2 to = new Vector2(1, 0);        float _angle = Vector2.Angle(from, to);        Vector3 _cross = Vector3.Cross(from, to);        if (_cross.z > 0)        {            _angle = 360f - _angle;        }        return _angle;    }}