unity中实现Edge浏览器鼠标手势的功能思路详解

 	private static bool MouseDown()
    {
        if (Application.isMobilePlatform)
        {
            if (Input.touchCount == 1 && Input.touches[0].phase == TouchPhase.Began)
            {
                MouseId = 0;
                return true;
            }
            return false;
        }
        if (Input.GetMouseButtonDown(1))
        {
            return true;
        }
        return false;
    }

 	private static bool MousePress()
    {
        if (Application.isMobilePlatform)
        {
            return Input.touches[0].phase == TouchPhase.Moved || Input.touches[0].phase == TouchPhase.Stationary;
        }
        if (Input.GetMouseButton(1))
        {
            return true;
        }
        return false;
    }

 	private static bool MouseUp()
    {
        if (Application.isMobilePlatform)
        {
            return Input.touches[0].phase == TouchPhase.Ended || Input.touches[0].phase == TouchPhase.Canceled;
        }
        if (Input.GetMouseButtonUp(1))
        {
            return true;
        }
        return false;
    }

  	private Vector2 GetDragDirection()
    {
        var v = (Vector2)Input.mousePosition - _preMousePoint;
        return v.normalized;
    }

 private Direction GetDirection()
    {
        var dir = GetDragDirection();
        var dotH = Vector2.Dot(Vector2.right, dir);
        var dorV = Vector2.Dot(Vector2.up, dir);
        //更趋向于横向滑动
        if (Mathf.Abs(dotH) > Mathf.Abs(dorV))
        {
            return dotH > 0 ? Direction.Right : Direction.Left;
        }
		//更趋向于纵向滑动
        if (Mathf.Abs(dotH) < Mathf.Abs(dorV))
        {
            return dorV > 0 ? Direction.Up : Direction.Down;
        }
        return _preDirection;
    }

private void UpdateGestures()
    {
        var dir = GetDirection();
        if (_preDirection != dir)
        {
            _preDirection = dir;
            _curDirections.Add(dir);
        }
    }

  public static Dictionary<GestureState, List<Direction>> Gestures = new()
    {
    { GestureState.Down , new() { Direction.Down }},
    { GestureState.Up , new(){ Direction.Up }},
    { GestureState.Left , new() { Direction.Left }},
    { GestureState.Right , new() { Direction.Right }},
    { GestureState.DownLeft , new() { Direction.Down, Direction.Left}},
    { GestureState.DownRight , new() { Direction.Down,Direction.Right }},
    { GestureState.UpLeft , new() { Direction.Up,Direction.Left }},
    { GestureState.UpRight , new() { Direction.Up,Direction.Right }},
    { GestureState.LeftDown , new() { Direction.Left, Direction.Down }},
    { GestureState.LeftUp , new() { Direction.Left, Direction.Up }},
    { GestureState.RightDown , new() {Direction.Right, Direction.Down }},
    { GestureState.RightUp , new(){Direction.Right, Direction.Up }},
    };

private GestureState MatchGesture()
    {
        var state = GestureState.Invalid;
        foreach (var gesture in Gestures)
        {
            if (gesture.Value.SequenceEqual(_curDirections))
            {
                state = gesture.Key;
                break;
            }
        }
        return state;
    }