LeapMotion第2代 Unity示范代码（桌面开发）

一、官方地址：

官网：https://www.ultraleap.com/
驱动下载：https://leap2.ultraleap.com/downloads/leap-motion-controller-2/
docs地址：https://docs.ultraleap.com/xr-and-tabletop/tabletop/unity/getting-started/index.html
unity开发地址（Demo下载）：https://docs.ultraleap.com/xr-and-tabletop/tabletop/unity/getting-started/index.html
unity开发代码：https://docs.ultraleap.com/xr-and-tabletop/xr/unity/plugin/features/scripting-fundamentals.html

二、安装驱动

地址：https://www.sogou.com/tx?ie=utf-8&query=<%2Fb>&hdq=sogou-addr-cc9657884708170e&sourceid=6_01_03

在这里插入图片描述

这样说明已经安装成功

三、安装TouchFree

Ultraleap的TouchFree软件使用手部跟踪数据来生成屏幕光标，用户可以无接触地控制该光标。这种非接触式手势控制允许与信息亭和数字显示器进行简单、直观和卫生的交互。

下载
安装完成后，进行配置
根据设备安放情况，选择
接着，把手指悬空点在绿色的圈圈上，并按下空格，这里需要2次这样操作
配置完成，看到手指已经有光标跟随了，手指往前戳下，代表点击
在小图标上，点击Start TouchFree，这样功能就永久启动起来了

touchfree模式，不用要开发，就可实验手势点击功能，由官方直接提供

四、Unity安装LeapMotion插件

https://docs.ultraleap.com/xr-and-tabletop/tabletop/unity/getting-started/index.html

安装包（能科学上网，速度更快）
打开Capsule Hands场景进行测试
测试出来手掌就成功了

五、Unity安装LeapMotion最基础开发

1. 识别哪只手进入

新建一个场景 LeapMotion
建立一个Service Provider Desktop
建立一个LeapMotion的cs脚本

using UnityEngine;
using Leap;public class LeapMotion : MonoBehaviour
{public LeapProvider leapProvider;private void OnEnable(){leapProvider.OnHandFound += OnHandFound;leapProvider.OnHandLost += OnHandLost;leapProvider.OnUpdateFrame += OnUpdateFrame;}private void OnDisable(){leapProvider.OnHandFound -= OnHandFound;leapProvider.OnHandLost -= OnHandLost;leapProvider.OnUpdateFrame -= OnUpdateFrame;}private void OnHandFound(Chirality hand){if (hand == Chirality.Left){Debug.Log("发现左手");}else if (hand == Chirality.Right) {Debug.Log("发现右手");}}private void OnHandLost(Chirality hand){if (hand == Chirality.Left){Debug.Log("左手消失");}else if (hand == Chirality.Right){Debug.Log("右手消失");}}void OnUpdateFrame(Frame frame){foreach (var hand in frame.Hands){if (hand.IsLeft){//获取左手Hand _leftHand = frame.GetHand(Chirality.Left);OnUpdateHand(_leftHand);}else if (hand.IsRight) {// 获取右手Hand _rightHand = frame.GetHand(Chirality.Right);OnUpdateHand(_rightHand);}}}void OnUpdateHand(Hand _hand){if (_hand.IsLeft){Debug.Log("左手");}else if (_hand.IsRight) {Debug.Log("右手");}}
}

建立一个LeapMotion对象，把脚本拖入场景，运行测试

该脚本识别出了哪只手进入或离开，并实时获取那只手，后面需要进一步获取手的更多信息

2. 获取手的位置与角度

五个指头的英文，Thumb大拇指，Index食指，Middle中指，Ring无名指，Pinky小指

Frames API：https://docs.ultraleap.com/api-reference/unity-api/class/class_leap_1_1_frame.html#class-Leap.Frame
Hand API：https://docs.ultraleap.com/api-reference/unity-api/class/class_leap_1_1_hand.html#class-Leap.Hand
Finger API：https://docs.ultraleap.com/api-reference/unity-api/class/class_leap_1_1_finger.html#class-Leap.Finger

获取代码

    void OnUpdateFrame(Frame frame){foreach (var hand in frame.Hands){if (hand.IsLeft){//获取左手Hand _leftHand = frame.GetHand(Chirality.Left);OnUpdateHand(_leftHand);}else if (hand.IsRight) {// 获取右手Hand _rightHand = frame.GetHand(Chirality.Right);OnUpdateHand(_rightHand);}}}void OnUpdateHand(Hand _hand){Finger _index = _hand.GetFinger(Finger.FingerType.INDEX);if (_hand.IsLeft){Debug.Log("左手");}else if (_hand.IsRight) {Debug.Log("右手");}Debug.Log("手掌位置" + _hand.PalmPosition.ToString());Debug.Log("手掌角度" + _hand.PalmVelocity.ToString());Debug.Log("手指位置" + _index.TipPosition.ToString());Debug.Log("手指方向-向量" + _index.Direction.ToString());}

3. 获取手是否捏了下，拇指与食指触碰和获取是否握拳

LeapMotion对于捏和握拳有特别的检测器，分别是PinchDetector 捏检测器，GrabDetector 握拳检测器

建立一个检测器的对象，里面有左右手对象
在左右手里，分别加入检测器
代码：

using UnityEngine;
using Leap;public class LeapMotion : MonoBehaviour
{public LeapProvider leapProvider;public PinchDetector leftPinchDetector;public PinchDetector rightPinchDetector;public GrabDetector leftGrabDetector;public GrabDetector rightGrabDetector;private void OnEnable(){leapProvider.OnHandFound += OnHandFound;leapProvider.OnHandLost += OnHandLost;leapProvider.OnUpdateFrame += OnUpdateFrame;leftPinchDetector.onActionStart += LeftHandPinchStart;leftPinchDetector.onAction += LeftHandPinching;leftPinchDetector.onActionEnd += LeftHandPinchEnd;rightPinchDetector.onActionStart += RightHandPinchStart;rightPinchDetector.onAction += RightHandPinching;rightPinchDetector.onActionEnd += RightHandPinchEnd;leftGrabDetector.onActionStart += LeftHandGrapStart;leftGrabDetector.onActionEnd += LeftHandGrabEnd;rightGrabDetector.onActionStart += RightHandGrabStart;rightGrabDetector.onActionEnd += RightHandGrabEnd;}private void OnDisable(){leapProvider.OnHandFound -= OnHandFound;leapProvider.OnHandLost -= OnHandLost;leapProvider.OnUpdateFrame -= OnUpdateFrame;leftPinchDetector.onActionStart -= LeftHandPinchStart;leftPinchDetector.onAction -= LeftHandPinching;leftPinchDetector.onActionEnd -= LeftHandPinchEnd;rightPinchDetector.onActionStart -= RightHandPinchStart;rightPinchDetector.onAction -= RightHandPinching;rightPinchDetector.onActionEnd -= RightHandPinchEnd;leftGrabDetector.onActionStart -= LeftHandGrapStart;leftGrabDetector.onActionEnd -= LeftHandGrabEnd;rightGrabDetector.onActionStart -= RightHandGrabStart;rightGrabDetector.onActionEnd -= RightHandGrabEnd;}private void OnHandFound(Chirality hand){if (hand == Chirality.Left){Debug.Log("发现左手");}else if (hand == Chirality.Right){Debug.Log("发现右手");}}private void OnHandLost(Chirality hand){if (hand == Chirality.Left){Debug.Log("左手消失");}else if (hand == Chirality.Right){Debug.Log("右手消失");}}void OnUpdateFrame(Frame frame){foreach (var hand in frame.Hands){if (hand.IsLeft){//获取左手Hand _leftHand = frame.GetHand(Chirality.Left);OnUpdateHand(_leftHand);}else if (hand.IsRight) {// 获取右手Hand _rightHand = frame.GetHand(Chirality.Right);OnUpdateHand(_rightHand);}}}void OnUpdateHand(Hand _hand){Finger _index = _hand.GetFinger(Finger.FingerType.INDEX);if (_hand.IsLeft){Debug.Log("左手");}else if (_hand.IsRight){Debug.Log("右手");}Debug.Log("手掌位置" + _hand.PalmPosition.ToString());Debug.Log("手掌角度" + _hand.PalmVelocity.ToString());Debug.Log("手指位置" + _index.TipPosition.ToString());Debug.Log("手指方向-向量" + _index.Direction.ToString());}private void RightHandGrabEnd(Hand hand){Debug.Log("Right 抓拳");}private void RightHandGrabStart(Hand hand){Debug.Log("Right 抓拳放开");}private void LeftHandGrabEnd(Hand hand){Debug.Log("Left 抓拳");}private void LeftHandGrapStart(Hand hand){Debug.Log("Left 抓拳放开");}private void RightHandPinchEnd(Hand hand){Debug.Log("Right 捏放开");}private void RightHandPinching(Hand hand){Debug.Log("Right 捏住移动中");}private void RightHandPinchStart(Hand hand){Debug.Log("Righ 捏住");}private void LeftHandPinchEnd(Hand hand){Debug.Log("Left 捏放开");}private void LeftHandPinching(Hand hand){Debug.Log("Left 捏住移动中");}private void LeftHandPinchStart(Hand hand){Debug.Log("Left 捏住");}
}