简单手势判断(二)

在移动设备上经常会有手势操作:方向滑动判断,缩放,乃至稍微复杂的一些,画圈,S移动等;当然目前有很多手势插件可以用,不过能自己弄出来还是不错的,先前有一个简单的方向滑动,这里新增一个简单的缩放判断,希望对你有帮助

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说明:需要开启多点触碰,放在初始化执行就可以了,中间注释的那一块是得到滑动的增量,需要的的可以自行打开;

        //开启多点触屏
        Input.multiTouchEnabled = true;

 #region---------------------手势判断----------------------

    enum FingerTouchType
    {
        type_LeftMove,
        type_RightMove,
        type_UpMove,
        type_DownMove,
        type_ScaleMin,
        type_ScaleMax
    }

    //记录单个触屏位置
    Vector2 screenPos = new Vector2();
    //手指位置
    Vector2 finger1 = new Vector2(), finger2 = new Vector2();
    //手指移动距离
    Vector2 mov1 = new Vector2(), mov2 = new Vector2();
    //距离
    float distance1 = 0, distance2 = 0;

    /// <summary>
    /// 判断函数,放在update里执行
    /// </summary>
    void FingerTouch()
    {
        if (Input.touchCount <= 0)
            return;
        if (Input.touchCount == 1)
        {
            if (Input.touches[0].phase == TouchPhase.Began)
            {
                //记录位置
                screenPos = Input.touches[0].position;

            }
            else if (Input.touches[0].phase == TouchPhase.Moved)
            {

            }

            if (Input.touches[0].phase == TouchPhase.Ended && Input.touches[0].phase != TouchPhase.Canceled)
            {
                Vector2 pos = Input.touches[0].position;
                switch (CheckTouchMove(screenPos, pos))
                {
                    case FingerTouchType.type_LeftMove:
                        {
                            touchEnd.text = "左滑";
                            break;
                        }
                    case FingerTouchType.type_RightMove:
                        {
                            touchEnd.text = "右滑";
                            break;
                        }
                    case FingerTouchType.type_UpMove:
                        {
                            touchEnd.text = "上滑";
                            break;
                        }
                    case FingerTouchType.type_DownMove:
                        {
                            touchEnd.text = "下滑";
                            break;
                        }
                }
            }
        }
        else if (Input.touchCount > 1)
        {
            for (int i = 0; i < Input.touchCount; ++i)
            {
                Touch touch = Input.touches[i];
                if (touch.phase == TouchPhase.Ended)
                    break;
                if (touch.phase == TouchPhase.Began)
                {
                    if (i == 0)
                        finger1 = touch.position;
                    else
                        finger2 = touch.position;
                    
                    distance1 = Vector2.Distance(finger1, finger2);
                  
                }

                #region--------------------滑动检测-----------------------
                /*if (touch.phase == TouchPhase.Moved)
                {
                    float mov = 0;
                    if (i == 0)
                    {
                        finger1 = touch.position;
                        mov1 = touch.deltaPosition;
                    }
                    else
                    {
                        finger2 = touch.position;
                        mov2 = touch.deltaPosition;
                        if (finger1.x > finger2.x)
                        {
                            mov = mov1.x;
                        }
                        else
                        {
                            mov = mov2.x;
                        }

                        if (finger1.y > finger2.y)
                        {
                            mov += mov1.y;
                        }
                        else
                        {
                            mov += mov2.y;
                        }
                    }
                }*/
                #endregion


                if (touch.phase == TouchPhase.Moved)
                {
                    if (i == 0)
                        finger1 = touch.position;
                    else
                        finger2 = touch.position;
                       
                    distance2 = Vector2.Distance(finger1, finger2);
                   
                    if (CheckTouchScale(distance1, distance2) == FingerTouchType.type_ScaleMax)
                    {
                        touchEnd.text = "放大";
                        Debug.Log("max");
                    }
                    else
                    {
                        touchEnd.text = "缩小";
                        Debug.Log("min");
                    }

                }
            }
        }
    }

    FingerTouchType CheckTouchMove(Vector2 start, Vector2 end)
    {
        if (Mathf.Abs(start.x - end.x) > Mathf.Abs(start.y - end.y))
        {
            if (start.x > end.x)
            {
                //左滑
                return FingerTouchType.type_LeftMove;
            }
            else
            {
                //右滑
                return FingerTouchType.type_RightMove;
            }
        }
        else//垂直滑动
        {
            if (start.y > end.y)
            {
                //下滑
                return FingerTouchType.type_DownMove;
            }
            else
            {
                //上滑
                return FingerTouchType.type_UpMove;
            }
        }
    }

    


    FingerTouchType CheckTouchScale(float dis1, float dis2)
    {
        return Mathf.Abs(dis1) - Mathf.Abs(dis2) >= 0 ? FingerTouchType.type_ScaleMin : FingerTouchType.type_ScaleMax;
    }


    #endregion

 #region---------------------鼠标判断----------------------

    void CheckMouseControl()
    {
        if (Input.GetMouseButtonDown(0))
        {
            //记录位置
            screenPos = Input.mousePosition;
        }

        if (Input.GetMouseButtonUp(0))
        {
            Vector2 pos = Input.mousePosition;
            float angle = GetAngleByTwoVector(screenPos, pos);
            Debug.Log("角度;" + angle);
            switch (CheckTouchMove(screenPos, pos))
            {
                case FingerTouchType.type_LeftMove:
                    {
                        touchEnd.text = "左滑";
                        break;
                    }
                case FingerTouchType.type_RightMove:
                    {
                        touchEnd.text = "右滑";
                        break;
                    }
                case FingerTouchType.type_UpMove:
                    {
                        touchEnd.text = "上滑";
                        break;
                    }
                case FingerTouchType.type_DownMove:
                    {
                        touchEnd.text = "下滑";
                        break;
                    }
            }
        }
    }

    #endregion

   

//角度

float GetAngleByTwoVector(Vector2 fromVector, Vector2 toVector)
    {
        Vector2 pos = new Vector2(fromVector.x, toVector.y);
        float angle = 0;
        Vector2 dic1 = fromVector - toVector;
        Vector2 dic2 = fromVector - pos;
        angle = Vector2.Dot(dic2.normalized, dic1.normalized);//点乘得到cos值
        angle = Mathf.Acos(angle) * 180 / 3.1416926f;
       
        return angle;
    }