【Unity/Kinect】手势识别Gesture
在Unity的AssetStore官方商店下载Kinect v2 Examples案例包，参考KinectDemos/GestureDemo这个文件夹下的例子。
自定义一个类，实现KinectGestures.GestureListenerInterface接口。参考案例中的CubeGestureListener中的用法。下面演示监听SwipeLeft向左划，SwipeRight向右划，SwipeUp向上划的手势Gesture。其中包含了一些修改界面UI显示当前手势状态等功能，如不需要可以去掉（主要是用来调试）。
using UnityEngine; using System.Collections; using System; //using Windows.Kinect; public class PeopleGestureListener : MonoBehaviour, KinectGestures.GestureListenerInterface { [Tooltip("Index of the player, tracked by this component. 0 means the 1st player, 1 - the 2nd one, 2 - the 3rd one, etc.")] public int playerIndex = 0; [Tooltip("GUI-Text to display gesture-listener messages and gesture information.")] public GUIText gestureInfo; // singleton instance of the class private static PeopleGestureListener instance = null; // internal variables to track if progress message has been displayed private bool progressDisplayed; private float progressGestureTime; // whether the needed gesture has been detected or not private bool swipeLeft; private bool swipeRight; private bool swipeUp; /// <summary> /// Gets the singleton CubeGestureListener instance. /// </summary> /// <value>The CubeGestureListener instance.</value> public static PeopleGestureListener Instance { get { return instance; } } /// <summary> /// Determines whether swipe left is detected. /// </summary> /// <returns><c>true</c> if swipe left is detected; otherwise, <c>false</c>.</returns> public bool IsSwipeLeft() { if(swipeLeft) { swipeLeft = false; return true; } return false; } /// <summary> /// Determines whether swipe right is detected. /// </summary> /// <returns><c>true</c> if swipe right is detected; otherwise, <c>false</c>.</returns> public bool IsSwipeRight() { if(swipeRight) { swipeRight = false; return true; } return false; } /// <summary> /// Determines whether swipe up is detected. /// </summary> /// <returns><c>true</c> if swipe up is detected; otherwise, <c>false</c>.</returns> public bool IsSwipeUp() { if(swipeUp) { swipeUp = false; return true; } return false; } /// <summary> /// Invoked when a new user is detected. Here you can start gesture tracking by invoking KinectManager.DetectGesture()-function. /// </summary> /// <param name="userId">User ID</param> /// <param name="userIndex">User index</param> public void UserDetected(long userId, int userIndex) { // the gestures are allowed for the primary user only KinectManager manager = KinectManager.Instance; if(!manager || (userIndex != playerIndex)) return; // detect these user specific gestures manager.DetectGesture(userId, KinectGestures.Gestures.SwipeLeft); manager.DetectGesture(userId, KinectGestures.Gestures.SwipeRight); manager.DetectGesture(userId, KinectGestures.Gestures.SwipeUp); if(gestureInfo != null) { gestureInfo.text = "Swipe left, right or up to change the slides."; } } /// <summary> /// Invoked when a user gets lost. All tracked gestures for this user are cleared automatically. /// </summary> /// <param name="userId">User ID</param> /// <param name="userIndex">User index</param> public void UserLost(long userId, int userIndex) { // the gestures are allowed for the primary user only if(userIndex != playerIndex) return; if(gestureInfo != null) { gestureInfo.text = string.Empty; } } /// <summary> /// Invoked when a gesture is in progress. /// </summary> /// <param name="userId">User ID</param> /// <param name="userIndex">User index</param> /// <param name="gesture">Gesture type</param> /// <param name="progress">Gesture progress [0..1]</param> /// <param name="joint">Joint type</param> /// <param name="screenPos">Normalized viewport position</param> public void GestureInProgress(long userId, int userIndex, KinectGestures.Gestures gesture, float progress, KinectInterop.JointType joint, Vector3 screenPos) { // the gestures are allowed for the primary user only if(userIndex != playerIndex) return; if((gesture == KinectGestures.Gestures.ZoomOut || gesture == KinectGestures.Gestures.ZoomIn) && progress > 0.5f) { if(gestureInfo != null) { string sGestureText = string.Format ("{0} - {1:F0}%", gesture, screenPos.z * 100f); gestureInfo.text = sGestureText; progressDisplayed = true; progressGestureTime = Time.realtimeSinceStartup; } } else if((gesture == KinectGestures.Gestures.Wheel || gesture == KinectGestures.Gestures.LeanLeft || gesture == KinectGestures.Gestures.LeanRight) && progress > 0.5f) { if(gestureInfo != null) { string sGestureText = string.Format ("{0} - {1:F0} degrees", gesture, screenPos.z); gestureInfo.text = sGestureText; progressDisplayed = true; progressGestureTime = Time.realtimeSinceStartup; } } else if(gesture == KinectGestures.Gestures.Run && progress > 0.5f) { if(gestureInfo != null) { string sGestureText = string.Format ("{0} - progress: {1:F0}%", gesture, progress * 100); gestureInfo.text = sGestureText; progressDisplayed = true; progressGestureTime = Time.realtimeSinceStartup; } } } /// <summary> /// Invoked if a gesture is completed. /// </summary> /// <returns>true</returns> /// <c>false</c> /// <param name="userId">User ID</param> /// <param name="userIndex">User index</param> /// <param name="gesture">Gesture type</param> /// <param name="joint">Joint type</param> /// <param name="screenPos">Normalized viewport position</param> public bool GestureCompleted (long userId, int userIndex, KinectGestures.Gestures gesture, KinectInterop.JointType joint, Vector3 screenPos) { // the gestures are allowed for the primary user only if(userIndex != playerIndex) return false; if(gestureInfo != null) { string sGestureText = gesture + " detected"; gestureInfo.text = sGestureText; } if(gesture == KinectGestures.Gestures.SwipeLeft) swipeLeft = true; else if(gesture == KinectGestures.Gestures.SwipeRight) swipeRight = true; else if(gesture == KinectGestures.Gestures.SwipeUp) swipeUp = true; return true; } /// <summary> /// Invoked if a gesture is cancelled. /// </summary> /// <returns>true</returns> /// <c>false</c> /// <param name="userId">User ID</param> /// <param name="userIndex">User index</param> /// <param name="gesture">Gesture type</param> /// <param name="joint">Joint type</param> public bool GestureCancelled (long userId, int userIndex, KinectGestures.Gestures gesture, KinectInterop.JointType joint) { // the gestures are allowed for the primary user only if(userIndex != playerIndex) return false; if(progressDisplayed) { progressDisplayed = false; if(gestureInfo != null) { gestureInfo.text = String.Empty; } } return true; } void Awake() { instance = this; } void Update() { if(progressDisplayed && ((Time.realtimeSinceStartup - progressGestureTime) > 2f)) { progressDisplayed = false; gestureInfo.text = String.Empty; Debug.Log("Forced progress to end."); } } }
调用方法：其他脚本获取该脚本的实例，然后通过IsSwipeLeft()等方法获取手势识别结果即可。
PeopleGestureListener gestureListener = PeopleGestureListener.Instance; if (gestureListener.IsSwipeLeft()) { // do something }
坑点：该脚本需要被挂在Kienct Manager脚本所在的游戏物体身上!
新手建议：如果自己写的GestureListener类 （实现KinectGestures.GestureListenerInterface接口）无论怎么测都不能识别出手势的话，可以复制KinectDemos/GestureDemo下面的例子场景（如KinectGesturesDemo1.unity），先实现能识别出手势了再根据自己的需求删改一下代码!
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