투명디스플레이 연구사업

using UnityEngine;

using System;

using System.Collections;

using System.Collections.Generic;

//using System.Runtime.InteropServices;

using System.Text;

/// <summary>

/// Facetracking manager is the component that manages the head and face tracking.

/// </summary>

public class FacetrackingManager : MonoBehaviour 

{

	[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("Whether to poll the HD-face model data or not.")]

	public bool getFaceModelData = false;

	[Tooltip("Whether to display the face rectangle over the color camera feed.")]

	public bool displayFaceRect = false;

	[Tooltip("Time tolerance in seconds, when the face may not to be tracked, without considering it lost.")]

	public float faceTrackingTolerance = 0.5f;

	[Tooltip("Game object that will be used to display the HD-face model mesh in the scene.")]

	public GameObject faceModelMesh = null;

	[Tooltip("Whether the HD-face model mesh should be mirrored or not.")]

	private bool mirroredModelMesh = true;

	//[Tooltip("Whether to skip the continuous updates of the HD-face model mesh, or not.")]

	//public bool dontUpdateModelMesh = false;

	[Tooltip("Whether to pause the updates of the HD-face model mesh.")]

	public bool pauseModelMeshUpdates = false;

	public enum TextureType : int { None, ColorMap, FaceRectangle }

	[Tooltip("How the HD-face model mesh should be textured.")]

	public TextureType texturedModelMesh = TextureType.ColorMap;

	[Tooltip("Whether to move the face model mesh, to be the same as user's head position.")]

	public bool moveModelMesh = false;

	[Tooltip("Camera that may be used to overlay face mesh over the color background.")]

	public Camera foregroundCamera;

	[Tooltip("Scale factor for the face mesh.")]

	[Range(0.1f, 2.0f)]

	public float modelMeshScale = 1f;

	[Tooltip("Vertical offset of the mesh above the head (in meters).")]

	[Range(-0.5f, 0.5f)]

	public float verticalMeshOffset = 0f;

	[Tooltip("GUI-Text to display the FT-manager debug messages.")]

	public GUIText debugText;

//	// nose and head transforms

//	public Transform noseTransform;

//	public Transform headTransform;

//	public GUIText debugText2;

	// Is currently tracking user's face

	private bool isTrackingFace = false;

	private float lastFaceTrackedTime = 0f;

	// Skeleton ID of the tracked face

	//private long faceTrackingID = 0;

	// Animation units

	private Dictionary<KinectInterop.FaceShapeAnimations, float> dictAU = new Dictionary<KinectInterop.FaceShapeAnimations, float>();

	private bool bGotAU = false;

	// Shape units

	private Dictionary<KinectInterop.FaceShapeDeformations, float> dictSU = new Dictionary<KinectInterop.FaceShapeDeformations, float>();

	private bool bGotSU = false;

	// whether the face model mesh was initialized

	private bool bFaceModelMeshInited = false;

	private Vector3[] vMeshVertices = null;

	// Vertices, UV and triangles of the face model

	private Vector3[] avModelVertices = null;

	private Vector2[] avModelUV = null;

	private bool bGotModelVertices = false;

	//private bool bGotModelVerticesFromDC = false;

	private int[] avModelTriangles = null;

	private bool bGotModelTriangles = false;

	private bool bGotModelTrianglesFromDC = false;

	// Head position and rotation

	private Vector3 headPos = Vector3.zero;

	private bool bGotHeadPos = false;

	private Quaternion headRot = Quaternion.identity;

	private bool bGotHeadRot = false;

	// offset vector from head to face center

	private Vector3 faceHeadOffset = Vector3.zero;

	// Tracked face rectangle

	private Rect faceRect = new Rect();

	//private bool bGotFaceRect;

	// primary user ID, as reported by KinectManager

	private long primaryUserID = 0;

	private long lastUserID = 0;

	// primary sensor data structure

	private KinectInterop.SensorData sensorData = null;

	// Bool to keep track of whether face-tracking system has been initialized

	private bool isFacetrackingInitialized = false;

	private bool wasFacetrackingActive = false;

	// The single instance of FacetrackingManager

	private static FacetrackingManager instance;

	// update times

	private float facePosUpdateTime = 0f;

	private float faceMeshUpdateTime = 0f;

	// used when dontUpdateModelMesh is true

	//private bool faceMeshGotOnce = false;

	// whether UpdateFaceModelMesh() is running

	private bool updateFaceMeshStarted = false;

	private RenderTexture faceMeshTexture = null;

	private Vector3 nosePos = Vector3.zero;

	/// <summary>

	/// Gets the single FacetrackingManager instance.

	/// </summary>

	/// <value>The FacetrackingManager instance.</value>

    public static FacetrackingManager Instance

    {

        get

        {

            return instance;

        }

    }

	/// <summary>

	/// Determines the facetracking system was successfully initialized, false otherwise.

	/// </summary>

	/// <returns><c>true</c> if the facetracking system was successfully initialized; otherwise, <c>false</c>.</returns>

	public bool IsFaceTrackingInitialized()

	{

		return isFacetrackingInitialized;

	}

	/// <summary>

	/// Determines whether this the sensor is currently tracking a face.

	/// </summary>

	/// <returns><c>true</c> if the sensor is tracking a face; otherwise, <c>false</c>.</returns>

	public bool IsTrackingFace()

	{

		return isTrackingFace;

	}

	/// <summary>

	/// Gets the current user ID, or 0 if no user is currently tracked.

	/// </summary>

	/// <returns>The face tracking I.</returns>

	public long GetFaceTrackingID()

	{

		return isTrackingFace ? primaryUserID : 0;

	}

	/// <summary>

	/// Determines whether the sensor is currently tracking the face of the specified user.

	/// </summary>

	/// <returns><c>true</c> if the sensor is currently tracking the face of the specified user; otherwise, <c>false</c>.</returns>

	/// <param name="userId">User ID</param>

	public bool IsTrackingFace(long userId)

	{

		if(sensorData != null && sensorData.sensorInterface != null)

		{

			return sensorData.sensorInterface.IsFaceTracked(userId);

		}

		return false;

	}

	/// <summary>

	/// Gets the last face position & rotation update time, in seconds since game start.

	/// </summary>

	/// <returns>The last face position & rotation update time.</returns>

	public float GetFacePosUpdateTime()

	{

		return facePosUpdateTime;

	}

	/// <summary>

	/// Gets the last face mesh update time, in seconds since game start.

	/// </summary>

	/// <returns>The last face mesh update time.</returns>

	public float GetFaceMeshUpdateTime()

	{

		return faceMeshUpdateTime;

	}

	/// <summary>

	/// Gets the head position of the currently tracked user.

	/// </summary>

	/// <returns>The head position.</returns>

	/// <param name="bMirroredMovement">If set to <c>true</c> returns mirorred head position.</param>

	public Vector3 GetHeadPosition(bool bMirroredMovement)

	{

		Vector3 vHeadPos = headPos; // bGotHeadPos ? headPos : Vector3.zero;

		if(!bMirroredMovement)

		{

			vHeadPos.z = -vHeadPos.z;

		}

		return vHeadPos;

	}

	/// <summary>

	/// Gets the head position of the specified user.

	/// </summary>

	/// <returns>The head position.</returns>

	/// <param name="userId">User ID</param>

	/// <param name="bMirroredMovement">If set to <c>true</c> returns mirorred head position.</param>

	public Vector3 GetHeadPosition(long userId, bool bMirroredMovement)

	{

		Vector3 vHeadPos = Vector3.zero;

		bool bGotPosition = sensorData.sensorInterface.GetHeadPosition(userId, ref vHeadPos);

		if(bGotPosition)

		{

			if(!bMirroredMovement)

			{

				vHeadPos.z = -vHeadPos.z;

			}

			return vHeadPos;

		}

		return Vector3.zero;

	}

	/// <summary>

	/// Gets the head rotation of the currently tracked user.

	/// </summary>

	/// <returns>The head rotation.</returns>

	/// <param name="bMirroredMovement">If set to <c>true</c> returns mirorred head rotation.</param>

	public Quaternion GetHeadRotation(bool bMirroredMovement)

	{

		Vector3 rotAngles = headRot.eulerAngles; // bGotHeadRot ? headRot.eulerAngles : Vector3.zero;

		if(bMirroredMovement)

		{

			rotAngles.x = -rotAngles.x;

			rotAngles.z = -rotAngles.z;

		}

		else

		{

			rotAngles.x = -rotAngles.x;

			rotAngles.y = -rotAngles.y;

		}

		return Quaternion.Euler(rotAngles);

	}

	/// <summary>

	/// Gets the head rotation of the specified user.

	/// </summary>

	/// <returns>The head rotation.</returns>

	/// <param name="userId">User ID</param>

	/// <param name="bMirroredMovement">If set to <c>true</c> returns mirorred head rotation.</param>

	public Quaternion GetHeadRotation(long userId, bool bMirroredMovement)

	{

		Quaternion vHeadRot = Quaternion.identity;

		bool bGotRotation = sensorData.sensorInterface.GetHeadRotation(userId, ref vHeadRot);

		if(bGotRotation)

		{

			Vector3 rotAngles = vHeadRot.eulerAngles;

			if(bMirroredMovement)

			{

				rotAngles.x = -rotAngles.x;

				rotAngles.z = -rotAngles.z;

			}

			else

			{

				rotAngles.x = -rotAngles.x;

				rotAngles.y = -rotAngles.y;

			}

			return Quaternion.Euler(rotAngles);

		}

		return Quaternion.identity;

	}

	/// <summary>

	/// Gets the tracked face rectangle of the specified user in color image coordinates, or zero-rect if the user's face is not tracked.

	/// </summary>

	/// <returns>The face rectangle, in color image coordinates.</returns>

	/// <param name="userId">User ID</param>

	public Rect GetFaceColorRect(long userId)

	{

		Rect faceColorRect = new Rect();

		sensorData.sensorInterface.GetFaceRect(userId, ref faceColorRect);

		return faceColorRect;

	}

	/// <summary>

	/// Determines whether there are valid anim units.

	/// </summary>

	/// <returns><c>true</c> if there are valid anim units; otherwise, <c>false</c>.</returns>

	public bool IsGotAU()

	{

		return bGotAU;

	}

	/// <summary>

	/// Gets the animation unit value at given index, or 0 if the index is invalid.

	/// </summary>

	/// <returns>The animation unit value.</returns>

	/// <param name="faceAnimKey">Face animation unit.</param>

	public float GetAnimUnit(KinectInterop.FaceShapeAnimations faceAnimKey)

	{

		if(dictAU.ContainsKey(faceAnimKey))

		{

			return dictAU[faceAnimKey];

		}

		return 0.0f;

	}

	/// <summary>

	/// Gets all animation units for the specified user.

	/// </summary>

	/// <returns><c>true</c>, if the user's face is tracked, <c>false</c> otherwise.</returns>

	/// <param name="userId">User ID</param>

	/// <param name="dictAnimUnits">Animation units dictionary, to get the results.</param>

	public bool GetUserAnimUnits(long userId, ref Dictionary<KinectInterop.FaceShapeAnimations, float> dictAnimUnits)

	{

		if(sensorData != null && sensorData.sensorInterface != null)

		{

			bool bGotIt = sensorData.sensorInterface.GetAnimUnits(userId, ref dictAnimUnits);

			return bGotIt;

		}

		return false;

	}

	/// <summary>

	/// Determines whether there are valid shape units.

	/// </summary>

	/// <returns><c>true</c> if there are valid shape units; otherwise, <c>false</c>.</returns>

	public bool IsGotSU()

	{

		return bGotSU;

	}

	/// <summary>

	/// Gets the shape unit value at given index, or 0 if the index is invalid.

	/// </summary>

	/// <returns>The shape unit value.</returns>

	/// <param name="faceShapeKey">Face shape unit.</param>

	public float GetShapeUnit(KinectInterop.FaceShapeDeformations faceShapeKey)

	{

		if(dictSU.ContainsKey(faceShapeKey))

		{

			return dictSU[faceShapeKey];

		}

		return 0.0f;

	}

	/// <summary>

	/// Gets all animation units for the specified user.

	/// </summary>

	/// <returns><c>true</c>, if the user's face is tracked, <c>false</c> otherwise.</returns>

	/// <param name="userId">User ID</param>

	/// <param name="dictShapeUnits">Shape units dictionary, to get the results.</param>

	public bool GetUserShapeUnits(long userId, ref Dictionary<KinectInterop.FaceShapeDeformations, float> dictShapeUnits)

	{

		if(sensorData != null && sensorData.sensorInterface != null)

		{

			bool bGotIt = sensorData.sensorInterface.GetShapeUnits(userId, ref dictShapeUnits);

			return bGotIt;

		}

		return false;

	}

	/// <summary>

	/// Gets the count of face model vertices.

	/// </summary>

	/// <returns>The count of face model vertices.</returns>

	public int GetFaceModelVertexCount()

	{

		if (avModelVertices != null) 

		{

			return avModelVertices.Length;

		} 

		return 0;

	}

	/// <summary>

	/// Gets the face model vertex, if a face model is available and the index is in range; Vector3.zero otherwise.

	/// </summary>

	/// <returns>The face model vertex.</returns>

	/// <param name="index">Vertex index, or Vector3.zero</param>

	public Vector3 GetFaceModelVertex(int index)

	{

		if (avModelVertices != null) 

		{

			if(index >= 0 && index < avModelVertices.Length)

			{

				return avModelVertices[index];

			}

		}

		return Vector3.zero;

	}

	/// <summary>

	/// Gets all face model vertices, if a face model is available; null otherwise.

	/// </summary>

	/// <returns>The face model vertices, or null.</returns>

	public Vector3[] GetFaceModelVertices()

	{

		return avModelVertices;

	}

	/// <summary>

	/// Gets the count of face model vertices for the specified user

	/// </summary>

	/// <returns>The count of face model vertices.</returns>

	/// <param name="userId">User ID</param>

	public int GetUserFaceVertexCount(long userId)

	{

		if(sensorData != null && sensorData.sensorInterface != null)

		{

			int iVertCount = sensorData.sensorInterface.GetFaceModelVerticesCount(userId);

			return iVertCount;

		}

		return 0;

	}

	/// <summary>

	/// Gets all face model vertices for the specified user.

	/// </summary>

	/// <returns><c>true</c>, if the user's face is tracked, <c>false</c> otherwise.</returns>

	/// <param name="userId">User ID</param>

	/// <param name="avVertices">Reference to array of vertices, to get the result.</param>

	public bool GetUserFaceVertices(long userId, ref Vector3[] avVertices)

	{

		if(sensorData != null && sensorData.sensorInterface != null)

		{

			bool bGotIt = sensorData.sensorInterface.GetFaceModelVertices(userId, ref avVertices);

			return bGotIt;

		}

		return false;

	}

	/// <summary>

	/// Gets the count of face model triangles.

	/// </summary>

	/// <returns>The count of face model triangles.</returns>

	public int GetFaceModelTriangleCount()

	{

		if (avModelTriangles != null) 

		{

			return avModelTriangles.Length;

		}

		return 0;

	}

	/// <summary>

	/// Gets the face model triangle indices, if a face model is available; null otherwise.

	/// </summary>

	/// <returns>The face model triangle indices, or null.</returns>

	/// <param name="bMirroredModel">If set to <c>true</c> gets mirorred model indices.</param>

	public int[] GetFaceModelTriangleIndices(bool bMirroredModel)

	{

		if (avModelTriangles != null) 

		{

			return avModelTriangles;

		}

		return null;

	}

	//----------------------------------- end of public functions --------------------------------------//

	void Awake()

	{

		instance = this;

	}

	void Start() 

	{

		try 

		{

			// get sensor data

			KinectManager kinectManager = KinectManager.Instance;

			if(kinectManager && kinectManager.IsInitialized())

			{

				sensorData = kinectManager.GetSensorData();

			}

			if(sensorData == null || sensorData.sensorInterface == null)

			{

				throw new Exception("Face tracking cannot be started, because KinectManager is missing or not initialized.");

			}

			if(debugText != null)

			{

				debugText.text = "Please, wait...";

			}

			// ensure the needed dlls are in place and face tracking is available for this interface

			bool bNeedRestart = false;

			if(sensorData.sensorInterface.IsFaceTrackingAvailable(ref bNeedRestart))

			{

				if(bNeedRestart)

				{

					KinectInterop.RestartLevel(gameObject, "FM");

					return;

				}

			}

			else

			{

				string sInterfaceName = sensorData.sensorInterface.GetType().Name;

				throw new Exception(sInterfaceName + ": Face tracking is not supported!");

			}

			// Initialize the face tracker

			wasFacetrackingActive = sensorData.sensorInterface.IsFaceTrackingActive();

			if(!wasFacetrackingActive)

			{

				if (!sensorData.sensorInterface.InitFaceTracking(getFaceModelData, displayFaceRect))

				{

					throw new Exception("Face tracking could not be initialized.");

				}

			}

			isFacetrackingInitialized = true;

			//DontDestroyOnLoad(gameObject);

			if(debugText != null)

			{

				debugText.text = "Ready.";

			}

		} 

		catch(DllNotFoundException ex)

		{

			Debug.LogError(ex.ToString());

			if(debugText != null)

				debugText.text = "Please check the Kinect and FT-Library installations.";

		}

		catch (Exception ex) 

		{

			Debug.LogError(ex.ToString());

			if(debugText != null)

				debugText.text = ex.Message;

		}

	}

	void OnDestroy()

	{

		if(isFacetrackingInitialized && !wasFacetrackingActive && sensorData != null && sensorData.sensorInterface != null)

		{

			// finish face tracking

			sensorData.sensorInterface.FinishFaceTracking();

		}

		if (faceMeshTexture != null) 

		{

			faceMeshTexture.Release();

			faceMeshTexture = null;

		}

//		// clean up

//		Resources.UnloadUnusedAssets();

//		GC.Collect();

		isFacetrackingInitialized = false;

		instance = null;

	}

	void Update() 

	{

		if(isFacetrackingInitialized)

		{

			KinectManager kinectManager = KinectManager.Instance;

			if(kinectManager && kinectManager.IsInitialized())

			{

				lastUserID = primaryUserID;

				primaryUserID = kinectManager.GetUserIdByIndex(playerIndex);

				if (primaryUserID != lastUserID && primaryUserID != 0) 

				{

					//faceMeshGotOnce = false;

				}

			}

			// update the face tracker

			isTrackingFace = false;

			bool bFacetrackingUpdated = !wasFacetrackingActive ? sensorData.sensorInterface.UpdateFaceTracking() : true;

			if(bFacetrackingUpdated)

			{

				// estimate the tracking state

				isTrackingFace = sensorData.sensorInterface.IsFaceTracked(primaryUserID);

				if(!isTrackingFace && (Time.realtimeSinceStartup - lastFaceTrackedTime) <= faceTrackingTolerance)

				{

					// allow tolerance in tracking

					isTrackingFace = true;

				}

				// get the facetracking parameters

				if(isTrackingFace)

				{

					lastFaceTrackedTime = Time.realtimeSinceStartup;

					facePosUpdateTime = Time.time;

					// get face rectangle

					/**bGotFaceRect =*/ sensorData.sensorInterface.GetFaceRect(primaryUserID, ref faceRect);

					// get head position

					bGotHeadPos = sensorData.sensorInterface.GetHeadPosition(primaryUserID, ref headPos);

					// get head rotation

					bGotHeadRot = sensorData.sensorInterface.GetHeadRotation(primaryUserID, ref headRot);

					// get the animation units

					bGotAU = sensorData.sensorInterface.GetAnimUnits(primaryUserID, ref dictAU);

					// get the shape units

					bGotSU = sensorData.sensorInterface.GetShapeUnits(primaryUserID, ref dictSU);

					//if(faceModelMesh != null && faceModelMesh.activeInHierarchy)

					{

						// apply model vertices to the mesh

						if(!bFaceModelMeshInited)

						{

							bFaceModelMeshInited = CreateFaceModelMesh();

						}

					}

					if (getFaceModelData && bFaceModelMeshInited && primaryUserID != 0) 

					{

						if (!pauseModelMeshUpdates && !updateFaceMeshStarted)

						{

							StartCoroutine(UpdateFaceModelMesh());

						}

					} 

				}

			}

//			// set mesh activity flag

//			bool bFaceMeshActive = isTrackingFace && primaryUserID != 0;

//			if(faceModelMesh != null && bFaceModelMeshInited && faceModelMesh.activeSelf != bFaceMeshActive)

//			{

//				faceModelMesh.SetActive(bFaceMeshActive);

//			}

		}

	}

	void OnGUI()

	{

		if(isFacetrackingInitialized)

		{

			if(debugText != null)

			{

				if(isTrackingFace)

				{

					debugText.text = "Tracking - BodyID: " + primaryUserID;

				}

				else

				{

					debugText.text = "Not tracking...";

				}

			}

		}

	}

	protected bool CreateFaceModelMesh()

	{

//		if(faceModelMesh == null)

//			return false;

		if (avModelVertices == null /**&& !bGotModelVerticesFromDC*/) 

		{

			int iNumVertices = sensorData.sensorInterface.GetFaceModelVerticesCount(0);

			if(iNumVertices <= 0)

				return false;

			avModelVertices = new Vector3[iNumVertices];

			bGotModelVertices = sensorData.sensorInterface.GetFaceModelVertices(0, ref avModelVertices);

			avModelUV = new Vector2[iNumVertices];

			if(!bGotModelVertices)

				return false;

		}

		// estimate face mesh vertices with respect to the head joint

		Vector3[] vMeshVertices = new Vector3[avModelVertices.Length];

		//if (!bGotModelVerticesFromDC) 

		{

			Vector3 vFaceCenter = Vector3.zero;

			for (int i = 0; i < avModelVertices.Length; i++) 

			{

				vFaceCenter += avModelVertices[i];

			}

			vFaceCenter /= (float)avModelVertices.Length;

			faceHeadOffset = Vector3.zero;

			if (vFaceCenter.sqrMagnitude >= 1f) 

			{

				Vector3 vHeadToFace = (vFaceCenter - headPos);

				faceHeadOffset = Quaternion.Inverse(headRot) * vHeadToFace;

				faceHeadOffset.y += verticalMeshOffset;

			}

			vFaceCenter -= headRot * faceHeadOffset;

			for(int i = 0; i < avModelVertices.Length; i++)

			{

				//avModelVertices[i] = kinectToWorld.MultiplyPoint3x4(avModelVertices[i]) - headPosWorld;

				//avModelVertices[i] -= vFaceCenter;

				vMeshVertices[i] = avModelVertices[i] - vFaceCenter;

			}

		}

		if (avModelTriangles == null && !bGotModelTrianglesFromDC) 

		{

			int iNumTriangles = sensorData.sensorInterface.GetFaceModelTrianglesCount();

			if(iNumTriangles <= 0)

				return false;

			avModelTriangles = new int[iNumTriangles];

			bGotModelTriangles = sensorData.sensorInterface.GetFaceModelTriangles(mirroredModelMesh, ref avModelTriangles);

			if(!bGotModelTriangles)

				return false;

		}

		if (faceModelMesh) 

		{

			Mesh mesh = new Mesh();

			mesh.name = "FaceMesh";

			faceModelMesh.GetComponent<MeshFilter>().mesh = mesh;

			mesh.vertices = vMeshVertices; // avModelVertices;

			//mesh.uv = avModelUV;

			mesh.triangles = avModelTriangles;

			mesh.RecalculateNormals();

//			if (moveModelMesh) 

//			{

//				faceModelMesh.transform.position = headPos;

//				//faceModelMesh.transform.rotation = faceModelRot;

//			}

			SetFaceModelMeshTexture();

		}

		//bFaceModelMeshInited = true;

		return true;

	}

	// sets the proper face mesh texture

	protected void SetFaceModelMeshTexture()

	{

		if (texturedModelMesh == TextureType.ColorMap) 

		{

			KinectManager kinectManager = KinectManager.Instance;

			Texture texColorMap = kinectManager ? kinectManager.GetUsersClrTex() : null;

			if (!faceMeshTexture && kinectManager && texColorMap) 

			{

				faceMeshTexture = new RenderTexture (texColorMap.width, texColorMap.height, 0);

				faceModelMesh.GetComponent<MeshRenderer>().material.mainTexture = faceMeshTexture;  // kinectManager.GetUsersClrTex();

			}

			if (faceMeshTexture && texColorMap) 

			{

				// update the color texture

				Graphics.Blit(texColorMap, faceMeshTexture);

			}

		}

		else if (texturedModelMesh == TextureType.FaceRectangle) 

		{

			if (faceMeshTexture != null) 

			{

				faceMeshTexture = null;

			}

		}

		else if(texturedModelMesh == TextureType.None)

		{

			if (faceModelMesh.GetComponent<MeshRenderer>().material.mainTexture != null) 

			{

				faceMeshTexture = null;

				faceModelMesh.GetComponent<MeshRenderer>().material.mainTexture = null;

			}

		}

	}

	protected IEnumerator UpdateFaceModelMesh()

	{

		updateFaceMeshStarted = true;

		//if (!dontUpdateModelMesh || !faceMeshGotOnce /**&& !bGotModelVerticesFromDC*/) 

		{

			// init the vertices array if needed

			if(avModelVertices == null)

			{

				int iNumVertices = sensorData.sensorInterface.GetFaceModelVerticesCount(primaryUserID);

				avModelVertices = new Vector3[iNumVertices];

			}

			// get face model vertices

			bGotModelVertices = sensorData.sensorInterface.GetFaceModelVertices(primaryUserID, ref avModelVertices);

		}

		if(bGotModelVertices && faceModelMesh != null)

		{

			//Quaternion faceModelRot = faceModelMesh.transform.rotation;

			//faceModelMesh.transform.rotation = Quaternion.identity;

			bool bFaceMeshUpdated = false;

			//if (!dontUpdateModelMesh || !faceMeshGotOnce) 

			{

				AsyncTask<bool> task = new AsyncTask<bool>(() => {

					// estimate face mesh vertices with respect to the head joint

					vMeshVertices = null;

					KinectManager kinectManager = KinectManager.Instance;

					Matrix4x4 kinectToWorld = kinectManager ? kinectManager.GetKinectToWorldMatrix() : Matrix4x4.identity;

					Vector3 headPosWorld = kinectToWorld.MultiplyPoint3x4(headPos);

					Vector3 lastNosePos = nosePos;

					//if (!bGotModelVerticesFromDC) 

					{

//						Vector3 vFaceCenter = Vector3.zero;

//						for (int i = 0; i < avModelVertices.Length; i++) 

//						{

//							vFaceCenter += avModelVertices[i];

//						}

//

//						vFaceCenter /= (float)avModelVertices.Length;

//

//						Vector3 vHeadToFace = (vFaceCenter - headPos);

//						if (vHeadToFace.sqrMagnitude < 0.015f) // max 0.12 x 0.12

//						{

//							faceHeadOffset = Quaternion.Inverse(headRot) * vHeadToFace;

//							faceHeadOffset.y += verticalMeshOffset;

//						}

						nosePos = GetFaceModelNosePos();

						Vector3 vHeadToNose = Quaternion.Inverse(headRot) * (nosePos - headPos);

						float headToNoseLen = vHeadToNose.magnitude;

//						string sHeadToNose = string.Format("({0:F2}, {0:F2}, {0:F2})", vHeadToNose.x, vHeadToNose.y, vHeadToNose.z);

//						Debug.Log("U-Face nosePos: " + nosePos + ", headPos: " + headPos + "\noffset: " + sHeadToNose + ", len: " + headToNoseLen);

						if(headToNoseLen >= 0.08f && headToNoseLen <= 0.18f)

						{

							//vFaceCenter -= headRot * faceHeadOffset;

							vMeshVertices = new Vector3[avModelVertices.Length];

							for(int i = 0; i < avModelVertices.Length; i++)

							{

								//avModelVertices[i] = kinectToWorld.MultiplyPoint3x4(avModelVertices[i]) - headPosWorld;

								//avModelVertices[i] -= vFaceCenter;

								//vMeshVertices[i] = avModelVertices[i] - vFaceCenter;

								vMeshVertices[i] = kinectToWorld.MultiplyPoint3x4(avModelVertices[i]) - headPosWorld; // avModelVertices[i] - headPos;

							}

						}	

					}

					if(vMeshVertices == null || lastNosePos == nosePos)

					{

						return false;

					}

					//if (!bGotModelVerticesFromDC) 

					{

						if(texturedModelMesh != TextureType.None)

						{

							float colorWidth = (float)kinectManager.GetColorImageWidth();

							float colorHeight = (float)kinectManager.GetColorImageHeight();

							//bool bGotFaceRect = sensorData.sensorInterface.GetFaceRect(userId, ref faceRect);

							bool faceRectValid = /**bGotFaceRect &&*/ faceRect.width > 0 && faceRect.height > 0;

							for(int i = 0; i < avModelVertices.Length; i++)

							{

								Vector2 posDepth = kinectManager.MapSpacePointToDepthCoords(avModelVertices[i]);

								bool bUvSet = false;

								if(posDepth != Vector2.zero)

								{

									ushort depth = kinectManager.GetDepthForPixel((int)posDepth.x, (int)posDepth.y);

									Vector2 posColor = kinectManager.MapDepthPointToColorCoords(posDepth, depth);

									if(posColor != Vector2.zero && !float.IsInfinity(posColor.x) && !float.IsInfinity(posColor.y))

									{

										if(texturedModelMesh == TextureType.ColorMap)

										{

											avModelUV[i] = new Vector2(posColor.x / colorWidth, posColor.y / colorHeight);

											bUvSet = true;

										}

										else if(texturedModelMesh == TextureType.FaceRectangle && faceRectValid)

										{

											avModelUV[i] = new Vector2(Mathf.Clamp01((posColor.x - faceRect.x) / faceRect.width), 

												-Mathf.Clamp01((posColor.y - faceRect.y) / faceRect.height));

											bUvSet = true;

										}

									}

								}

								if(!bUvSet)

								{

									avModelUV[i] = Vector2.zero;

								}

							}

						}

					}

					return true;

				});

				task.Start();

				while (task.State == AsyncTaskState.Running)

				{

					yield return null;

				}

//				// show nose & head positions

//				Matrix4x4 kinectToWorld2 = KinectManager.Instance.GetKinectToWorldMatrix();

//				if (noseTransform)

//					noseTransform.position = kinectToWorld2.MultiplyPoint3x4(nosePos);

//				if(headTransform)

//					headTransform.position = kinectToWorld2.MultiplyPoint3x4(headPos);

//

//				Vector3 vHeadToNose2 = Quaternion.Inverse(headRot) * (nosePos - headPos);

//				string sHeadToNose2 = string.Format("({0:F2}, {0:F2}, {0:F2})", vHeadToNose2.x, vHeadToNose2.y, vHeadToNose2.z);

//				if(debugText2)

//					debugText2.text = "h2n: " + sHeadToNose2 + ", len: " + vHeadToNose2.magnitude;

				bFaceMeshUpdated = task.Result;

				if(bFaceMeshUpdated) 

				{

					Mesh mesh = faceModelMesh.GetComponent<MeshFilter>().mesh;

					mesh.vertices = vMeshVertices; // avModelVertices;

					vMeshVertices = null;

					if(texturedModelMesh != TextureType.None && avModelUV != null)

					{

						mesh.uv = avModelUV;

					}

					faceMeshUpdateTime = Time.time;

					//faceMeshGotOnce = true;

					mesh.RecalculateNormals();

					mesh.RecalculateBounds();

					// set the face mesh texture

					SetFaceModelMeshTexture();

				}

			}

			if (moveModelMesh) 

			{

				KinectManager kinectManager = KinectManager.Instance;

				Matrix4x4 kinectToWorld = kinectManager ? kinectManager.GetKinectToWorldMatrix() : Matrix4x4.identity;

				Vector3 newHeadPos = kinectToWorld.MultiplyPoint3x4(headPos);

				// check for head pos overlay

				if(foregroundCamera)

				{

					// get the background rectangle (use the portrait background, if available)

					Rect backgroundRect = foregroundCamera.pixelRect;

					PortraitBackground portraitBack = PortraitBackground.Instance;

					if(portraitBack && portraitBack.enabled)

					{

						backgroundRect = portraitBack.GetBackgroundRect();

					}

					if(kinectManager)

					{

						Vector3 posColorOverlay = kinectManager.GetJointPosColorOverlay(primaryUserID, (int)KinectInterop.JointType.Head, foregroundCamera, backgroundRect);

						if(posColorOverlay != Vector3.zero)

						{

							newHeadPos = posColorOverlay;

						}

					}

				}

				faceModelMesh.transform.position = newHeadPos; // Vector3.Lerp(faceModelMesh.transform.position, newHeadPos, 20f * Time.deltaTime);

				//faceModelMesh.transform.rotation = faceModelRot;

			}

			// don't rotate the transform - mesh follows the head rotation

			if (faceModelMesh.transform.rotation != Quaternion.identity) 

			{

				faceModelMesh.transform.rotation = Quaternion.identity;

			}

			// apply scale factor

			if(faceModelMesh.transform.localScale.x != modelMeshScale)

			{

				faceModelMesh.transform.localScale = new Vector3(modelMeshScale, modelMeshScale, modelMeshScale);

			}

			if(!faceModelMesh.activeSelf)

			{

				faceModelMesh.SetActive(true);

			}

		}

		else

		{

			if(faceModelMesh && faceModelMesh.activeSelf)

			{

				faceModelMesh.SetActive(false);

			}

		}

		updateFaceMeshStarted = false;

	}

	// returns the nose tip position, or Vector3.zero if not found

	private Vector3 GetFaceModelNosePos()

	{

		if (avModelVertices != null) 

		{

			int iNoseIndex = -1;

			if (sensorData.sensorIntPlatform == KinectInterop.DepthSensorPlatform.KinectSDKv2 ||

			    sensorData.sensorIntPlatform == KinectInterop.DepthSensorPlatform.KinectUWPv2 ||

			    sensorData.sensorIntPlatform == KinectInterop.DepthSensorPlatform.DummyK2) 

			{

				iNoseIndex = 18; // Microsoft.Kinect.Face.HighDetailFacePoints.NoseTip

			} 

			else if (sensorData.sensorIntPlatform == KinectInterop.DepthSensorPlatform.KinectSDKv1 ||

			        sensorData.sensorIntPlatform == KinectInterop.DepthSensorPlatform.DummyK1) 

			{

				iNoseIndex = 89; // 

			}

			if (iNoseIndex >= 0 && iNoseIndex < avModelVertices.Length) 

			{

				return avModelVertices[iNoseIndex];

			}

		}

		return Vector3.zero;

	}

	// gets face basic parameters as csv line

	public string GetFaceParamsAsCsv()

	{

		// create the output string

		StringBuilder sbBuf = new StringBuilder();

		const char delimiter = ',';

		if (bGotHeadPos || bGotHeadRot)

		{

			sbBuf.Append("fp").Append(delimiter);

			// head pos

			sbBuf.Append (bGotHeadPos ? "1" : "0").Append(delimiter);

			if (bGotHeadPos) 

			{

				sbBuf.AppendFormat ("{0:F3}", headPos.x).Append (delimiter);

				sbBuf.AppendFormat ("{0:F3}", headPos.y).Append (delimiter);

				sbBuf.AppendFormat ("{0:F3}", headPos.z).Append (delimiter);

			}

			// head rot

			sbBuf.Append (bGotHeadRot ? "1" : "0").Append(delimiter);

			Vector3 vheadRot = headRot.eulerAngles;

			if (bGotHeadRot) 

			{

				sbBuf.AppendFormat ("{0:F3}", vheadRot.x).Append (delimiter);

				sbBuf.AppendFormat ("{0:F3}", vheadRot.y).Append (delimiter);

				sbBuf.AppendFormat ("{0:F3}", vheadRot.z).Append (delimiter);

			}

			// face rect

			sbBuf.Append ("1").Append(delimiter);  

			sbBuf.AppendFormat ("{0:F0}", faceRect.x).Append (delimiter);

			sbBuf.AppendFormat ("{0:F0}", faceRect.y).Append (delimiter);

			sbBuf.AppendFormat ("{0:F0}", faceRect.width).Append (delimiter);

			sbBuf.AppendFormat ("{0:F0}", faceRect.height).Append (delimiter);

			// animation units

			sbBuf.Append (bGotAU ? "1" : "0").Append(delimiter);

			if (bGotAU) 

			{

				int enumCount = Enum.GetNames (typeof(KinectInterop.FaceShapeAnimations)).Length;

				sbBuf.Append (enumCount).Append(delimiter);

				for (int i = 0; i < enumCount; i++) 

				{

					float dictValue = dictAU [(KinectInterop.FaceShapeAnimations)i];

					sbBuf.AppendFormat ("{0:F3}", dictValue).Append (delimiter);

				}

			}

			// shape units

			sbBuf.Append (bGotSU ? "1" : "0").Append(delimiter);

			if (bGotSU) 

			{

				int enumCount = Enum.GetNames (typeof(KinectInterop.FaceShapeDeformations)).Length;

				sbBuf.Append (enumCount).Append(delimiter);

				for (int i = 0; i < enumCount; i++) 

				{

					float dictValue = dictSU [(KinectInterop.FaceShapeDeformations)i];

					sbBuf.AppendFormat ("{0:F3}", dictValue).Append (delimiter);

				}

			}

			// any other parameters...

		}

		// remove the last delimiter

		if(sbBuf.Length > 0 && sbBuf[sbBuf.Length - 1] == delimiter)

		{

			sbBuf.Remove(sbBuf.Length - 1, 1);

		}

		return sbBuf.ToString();

	}

	// sets basic face parameters from a csv line

	public bool SetFaceParamsFromCsv(string sCsvLine)

	{

		if(sCsvLine.Length == 0)

			return false;

		// split the csv line in parts

		char[] delimiters = { ',' };

		string[] alCsvParts = sCsvLine.Split(delimiters);

		if(alCsvParts.Length < 1 || alCsvParts[0] != "fp")

			return false;

		int iIndex = 1;

		int iLength = alCsvParts.Length;

		if (iLength < (iIndex + 1))

			return false;

		// head pos

		bGotHeadPos = (alCsvParts[iIndex] == "1");

		iIndex++;

		if (bGotHeadPos && iLength >= (iIndex + 3)) 

		{

			float x = 0f, y = 0f, z = 0f;

			float.TryParse(alCsvParts[iIndex], out x);

			float.TryParse(alCsvParts[iIndex + 1], out y);

			float.TryParse(alCsvParts[iIndex + 2], out z);

			iIndex += 3;

			headPos = new Vector3(x, y, z);

		}

		// head rot

		bGotHeadRot = (alCsvParts[iIndex] == "1");

		iIndex++;

		if (bGotHeadRot && iLength >= (iIndex + 3)) 

		{

			float x = 0f, y = 0f, z = 0f;

			float.TryParse(alCsvParts[iIndex], out x);

			float.TryParse(alCsvParts[iIndex + 1], out y);

			float.TryParse(alCsvParts[iIndex + 2], out z);

			iIndex += 3;

			headRot = Quaternion.Euler(x, y, z);

		}

		// face rect

		bool bGotFaceRect = (alCsvParts[iIndex] == "1");

		iIndex++;

		if (bGotFaceRect && iLength >= (iIndex + 4)) 

		{

			float x = 0f, y = 0f, w = 0f, h = 0f;

			float.TryParse(alCsvParts[iIndex], out x);

			float.TryParse(alCsvParts[iIndex + 1], out y);

			float.TryParse(alCsvParts[iIndex + 2], out w);

			float.TryParse(alCsvParts[iIndex + 3], out h);

			iIndex += 4;

			faceRect.x = x; faceRect.y = y;

			faceRect.width = w; faceRect.height = h;

		}

		// animation units

		bGotAU = (alCsvParts[iIndex] == "1");

		iIndex++;

		if (bGotAU && iLength >= (iIndex + 1)) 

		{

			int count = 0;

			int.TryParse(alCsvParts[iIndex], out count);

			iIndex++;

			for (int i = 0; i < count && iLength >= (iIndex + 1); i++) 

			{

				float v = 0;

				float.TryParse(alCsvParts[iIndex], out v);

				iIndex++;

				dictAU [(KinectInterop.FaceShapeAnimations)i] = v;

			}

		}

		// shape units

		bGotSU = (alCsvParts[iIndex] == "1");

		iIndex++;

		if (bGotSU && iLength >= (iIndex + 1)) 

		{

			int count = 0;

			int.TryParse(alCsvParts[iIndex], out count);

			iIndex++;

			for (int i = 0; i < count && iLength >= (iIndex + 1); i++) 

			{

				float v = 0;

				float.TryParse(alCsvParts[iIndex], out v);

				iIndex++;

				dictSU [(KinectInterop.FaceShapeDeformations)i] = v;

			}

		}

		// any other parameters here...

		// emulate face tracking

		lastFaceTrackedTime = Time.realtimeSinceStartup;

		facePosUpdateTime = Time.time;

		return true;

	}

	// gets face model vertices as csv line

	public string GetFaceVerticesAsCsv()

	{

		// create the output string

		StringBuilder sbBuf = new StringBuilder();

		const char delimiter = ',';

		if (bGotModelVertices && avModelVertices != null)

		{

			sbBuf.Append("fv").Append(delimiter);

			// model vertices

			int vertCount = avModelVertices.Length;

			sbBuf.Append (vertCount).Append(delimiter);

			for (int i = 0; i < vertCount; i++) 

			{

				sbBuf.AppendFormat ("{0:F3}", avModelVertices[i].x).Append (delimiter);

				sbBuf.AppendFormat ("{0:F3}", avModelVertices[i].y).Append (delimiter);

				sbBuf.AppendFormat ("{0:F3}", avModelVertices[i].z).Append (delimiter);

			}

		}

		// remove the last delimiter

		if(sbBuf.Length > 0 && sbBuf[sbBuf.Length - 1] == delimiter)

		{

			sbBuf.Remove(sbBuf.Length - 1, 1);

		}

		return sbBuf.ToString();

	}

	// sets face model vertices from a csv line

	public bool SetFaceVerticesFromCsv(string sCsvLine)

	{

		if(sCsvLine.Length == 0)

			return false;

		// split the csv line in parts

		char[] delimiters = { ',' };

		string[] alCsvParts = sCsvLine.Split(delimiters);

		if(alCsvParts.Length < 1 || alCsvParts[0] != "fv")

			return false;

		int iIndex = 1;

		int iLength = alCsvParts.Length;

		if (iLength < (iIndex + 1))

			return false;

		// model vertices

		int vertCount = 0;

		int.TryParse(alCsvParts[iIndex], out vertCount);

		iIndex++;

		if (vertCount > 0) 

		{

			if (avModelVertices == null || avModelVertices.Length != vertCount) 

			{

				avModelVertices = new Vector3[vertCount];

			}

			for (int i = 0; i < vertCount && iLength >= (iIndex + 3); i++) 

			{

				float x = 0f, y = 0f, z = 0f;

				float.TryParse(alCsvParts[iIndex], out x);

				float.TryParse(alCsvParts[iIndex + 1], out y);

				float.TryParse(alCsvParts[iIndex + 2], out z);

				iIndex += 3;

				avModelVertices[i] = new Vector3(x, y, z);

			}

			bGotModelVertices = true;

			//bGotModelVerticesFromDC = true;

		}

		faceMeshUpdateTime = Time.time;

		return true;

	}

	// gets face model UVs as csv line

	public string GetFaceUvsAsCsv()

	{

		// create the output string

		StringBuilder sbBuf = new StringBuilder();

		const char delimiter = ',';

		if (bGotModelVertices && avModelUV != null)

		{

			sbBuf.Append("fu").Append(delimiter);

			// face rect width & height

			sbBuf.AppendFormat ("{0:F0}", faceRect.width).Append (delimiter);

			sbBuf.AppendFormat ("{0:F0}", faceRect.height).Append (delimiter);

			// model UVs

			int uvCount = avModelUV.Length;

			sbBuf.Append (uvCount).Append(delimiter);

			for (int i = 0; i < uvCount; i++) 

			{

				sbBuf.AppendFormat ("{0:F3}", avModelUV[i].x).Append (delimiter);

				sbBuf.AppendFormat ("{0:F3}", avModelUV[i].y).Append (delimiter);

			}

		}

		// remove the last delimiter

		if(sbBuf.Length > 0 && sbBuf[sbBuf.Length - 1] == delimiter)

		{

			sbBuf.Remove(sbBuf.Length - 1, 1);

		}

		return sbBuf.ToString();

	}

	// sets face model UVs from a csv line

	public bool SetFaceUvsFromCsv(string sCsvLine)

	{

		if(sCsvLine.Length == 0)

			return false;

		// split the csv line in parts

		char[] delimiters = { ',' };

		string[] alCsvParts = sCsvLine.Split(delimiters);

		if(alCsvParts.Length < 1 || alCsvParts[0] != "fu")

			return false;

		int iIndex = 1;

		int iLength = alCsvParts.Length;

		if (iLength < (iIndex + 2))

			return false;

		// face width & height

		float w = 0f, h = 0f;

		float.TryParse(alCsvParts[iIndex], out w);

		float.TryParse(alCsvParts[iIndex + 1], out h);

		iIndex += 2;

		faceRect.width = w; faceRect.height = h;

		// model UVs

		int uvCount = 0;

		if (iLength >= (iIndex + 1)) 

		{

			int.TryParse(alCsvParts[iIndex], out uvCount);

			iIndex++;

		}

		if (uvCount > 0) 

		{

			if (avModelUV == null || avModelUV.Length != uvCount) 

			{

				avModelUV = new Vector2[uvCount];

			}

			for (int i = 0; i < uvCount && iLength >= (iIndex + 2); i++) 

			{

				float x = 0f, y = 0f;

				float.TryParse(alCsvParts[iIndex], out x);

				float.TryParse(alCsvParts[iIndex + 1], out y);

				iIndex += 2;

				avModelUV[i] = new Vector2(x, y);

			}

		}

		return true;

	}

	// gets face model triangles as csv line

	public string GetFaceTrianglesAsCsv()

	{

		// create the output string

		StringBuilder sbBuf = new StringBuilder();

		const char delimiter = ',';

		if (avModelTriangles != null)

		{

			sbBuf.Append("ft").Append(delimiter);

			// model triangles

			int triCount = avModelTriangles.Length;

			sbBuf.Append (triCount).Append(delimiter);

			for (int i = 0; i < triCount; i++) 

			{

				sbBuf.Append(avModelTriangles[i]).Append (delimiter);

			}

		}

		// remove the last delimiter

		if(sbBuf.Length > 0 && sbBuf[sbBuf.Length - 1] == delimiter)

		{

			sbBuf.Remove(sbBuf.Length - 1, 1);

		}

		return sbBuf.ToString();

	}

	// sets face model model from a csv line

	public bool SetFaceTrianglesFromCsv(string sCsvLine)

	{

		if(sCsvLine.Length == 0)

			return false;

		// split the csv line in parts

		char[] delimiters = { ',' };

		string[] alCsvParts = sCsvLine.Split(delimiters);

		if(alCsvParts.Length < 1 || alCsvParts[0] != "ft")

			return false;

		int iIndex = 1;

		int iLength = alCsvParts.Length;

		if (iLength < (iIndex + 1))

			return false;

		// model triangles

		int triCount = 0;

		int.TryParse(alCsvParts[iIndex], out triCount);

		iIndex++;

		if (triCount > 0) 

		{

			if (avModelTriangles == null || avModelTriangles.Length != triCount) 

			{

				avModelTriangles = new int[triCount];

			}

			for (int i = 0; i < triCount && iLength >= (iIndex + 1); i++) 

			{

				int v = 0;

				int.TryParse(alCsvParts[iIndex], out v);

				iIndex++;

				avModelTriangles[i] = v;

			}

			bGotModelTriangles = true;

			bGotModelTrianglesFromDC = true;

		}

		return true;

	}

}