Lua 中使用Finger Touch 处理手势识别_语言综合

概述Finger Touch 是一种处理手势识别的插件，在游戏开发中经常会用到，这里我先简单介绍一下Finger Touch（如有错误欢迎指正） : #region Event // Fired when a finger begins touching the screen (LeanFinger = The current finger) public static System.Action<

Finger touch 是一种处理手势识别的插件，在游戏开发中经常会用到，这里我先简单介绍一下Finger touch（如有错误欢迎指正） :

#region Event
// Fired when a finger begins touching the screen (LeanFinger = The current finger)
public static System.Action<CheapFinger> OnFingerDown;
// Fired when a finger stops touching the screen (LeanFinger = The current finger)
public static System.Action<CheapFinger> OnFingerUp;
// Fired when a finger taps the screen (this is when a finger begins and stops touching the screen within the ‘TapThreshold‘ time) (LeanFinger = The current finger)
public static System.Action<CheapFinger> OnFingerTap;
// Fired when a finger swipes the screen (this is when a finger begins and stops touching the screen within the ‘TapThreshold‘ time,and also moves more than the ‘SwipeThreshold‘ distance) (LeanFinger = The current finger)
public static System.Action<CheapFinger> OnFingerSwipe;
// Fired when a finger begins being held on the screen (this is when a finger has been set for longer than the ‘HeldThreshold‘ time) (LeanFinger = The current finger)
public static System.Action<CheapFinger> OnFingerHeldDown;

// Fired when at least one finger taps the screen (int = Highest Finger Count)
public static System.Action<int> OnMultiTap;

// add: pinch/drag start/end event
public static System.Action OnPinchStart;
public static System.Action OnPinchEnd;
public static System.Action<CheapFinger> OnDragStart;
public static System.Action OnDragEnd;
#endregion

Finger touch 中事件有以上按下、抬起、敲击、扭转、长按、多指敲击、拖拽等

其次介绍一下：touchScreen (自定义类)

touchScreen 中在做 4件事

第一：监测手势触发点

第二: 将屏幕触发点转化为射线

第三：通过射线检测是否触发到某个obj

第四：将射线传递给Lua

简要代码如下：

public voID Tick(float deltaTime)
{
if (input.touchCount > 0 && (input.Gettouch(0).phase == touchPhase.Moved || input.Gettouch(0).phase == touchPhase.Stationary))
{
_currenttouchTime += deltaTime;
if (_currenttouchTime > MIN_TIME)
{
_currenttouchTime = 0.0f;
CallLuaFunction(ON_touch_MOVE);
}
}
#if UNITY_STANDALONE_WIN
else if(input.GetMousebutton(0))
{
_currenttouchTime += deltaTime;
if (_currenttouchTime > MIN_TIME)
{
_currenttouchTime = 0.0f;
CallLuaFunction(ON_touch_MOVE);
}
}
#endif
else
{
_currenttouchTime = 0.0f;
}
}

private voID CallLuaFunction(string functionname)
{
if (string.IsNullOrEmpty(functionname))
{
return;
}
var ray = rayCamera.ScreenPointToRay(input.mouseposition);

var hitInfo = GetRayCastHit ();
if (hitInfo != null && hitInfo.Length > 0)
{
if (!HitUI(input.mouseposition))
{
LuaScriptMgr.Instance.CallLuaFunction("touchAgent." + functionname,hitInfo);
}
}
}

Cheaptouch 继承MonoBehavior,Cheaptouch 实现OnEnable、Update方法；

我们要在OnEnable 和 update 里做什么处理呢？这个就是需要和Lua 逻辑关联起来

OnEnable 中设置当前实例，也就是当Cheaptouch 挂到游戏某个对象上时实例化该脚本。

Update 中做二件事：

1.touchScreen 实例传给Lua

2.更新各种 *** 作和事件如：

UpdateFingers();
UpdateMultiTap();
UpdateGestures();
UpdateEvents();

UpdateEvent();处理事件包括点击拖拽扭转等等并调用Lua

例如点击事件：

private voID RaiseFingerDownEvent(CheapFinger finger)
{
finger.SetCurUIGameObject();
fingerType = FINGER_DOWN;
CallLuaEventMethod(finger);

if (OnFingerDown != null) { OnFingerDown(finger); } }

总结