add package files

2023-06-15 09:52:08 +08:00
parent 06d41412be
commit a0b3b91879
382 changed files with 44971 additions and 0 deletions
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Editor.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Editor.meta
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Editor/HandTrackingFeauterInstaller.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Editor/HandTrackingFeauterInstaller.cs
@@ -0,0 +1,54 @@
+using UnityEditor;
+using UnityEditor.XR.OpenXR.Features;
+using UnityEngine;
+using UnityEngine.XR.OpenXR;
+using System;
+using System.Linq;
+using System.Reflection;
+using System.IO;
+using VIVE.HandTracking;
+using UnityEngine.XR.OpenXR.Features;
+namespace UnityEditor.XR.OpenXR.Samples.HandTracking
+{
+    [InitializeOnLoad]
+    public class HandTrackingFeauterInstaller : Editor
+    {
+#if !UNITY_SAMPLE_DEV
+        private const string k_ScriptPath = "HandTracking Example/Editor/HandTrackingFeauterInstaller.cs";
+        static HandTrackingFeauterInstaller()
+        {
+            FeatureHelpers.RefreshFeatures(BuildTargetGroup.Standalone);
+            var feature = OpenXRSettings.Instance.GetFeature<HandTracking_OpenXR_API>();
+            var HandInteractionfeature = OpenXRSettings.Instance.GetFeature<HtcViveHandInteractionInputFeature>();
+            if (feature != null)
+            {
+                if (feature.enabled != true)
+                {
+                    feature.enabled = true;
+                }
+            }
+            if (HandInteractionfeature != null)
+            {
+                if (HandInteractionfeature.enabled != true)
+                {
+                    HandInteractionfeature.enabled = true;
+                }
+            }
+            Debug.Log(AssetDatabase.FindAssets(Path.GetFileNameWithoutExtension(k_ScriptPath)).Select(AssetDatabase.GUIDToAssetPath));
+            var source = AssetDatabase.FindAssets(Path.GetFileNameWithoutExtension(k_ScriptPath))
+                .Select(AssetDatabase.GUIDToAssetPath)
+                .FirstOrDefault(r => r.Contains(k_ScriptPath));
+
+            if (string.IsNullOrEmpty(source))
+            {
+                Debug.LogError("File Not Exist");
+                return;
+            }
+
+            source = Path.GetDirectoryName(source);
+            Debug.Log(source);
+            AssetDatabase.DeleteAsset(Path.Combine(Path.GetDirectoryName(source), "Editor"));
+        }
+#endif
+    }
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Editor/HandTrackingFeauterInstaller.cs.meta
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/HandInteractions.inputactions
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/HandInteractions.inputactions
@@ -0,0 +1,182 @@
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+    "name": "HandInteractions",
+    "maps": [
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+            "id": "9ef2cbaf-c5ca-4f94-afd3-c13e92ae39b0",
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+    ],
+    "controlSchemes": []
+}
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Prefabs/SkeletonHand.prefab.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Prefabs/SkeletonHand.prefab.meta
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Readme.md
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Readme.md
@@ -0,0 +1,26 @@
+# VIVE OpenXR Hand Tracking Unity Feature
+
+To help software developers create an application for locating hand joints with the OpenXR hand tracking extension [XR_EXT_hand_tracking](https://www.khronos.org/registry/OpenXR/specs/1.0/html/xrspec.html#XR_EXT_hand_tracking).
+
+## Load sample code
+**Window** > **Package Manager** > **VIVE OpenXR Plugin - Windows** > **Samples** > Click to import **HandTracking Example**
+
+## Play the sample scene    
+1. **Edit** > **Project Settings** > **XR Plug-in Management** > Select **OpenXR** , click Exclamation mark next to it then choose **Fix All**.
+2. **Edit** > **Project Settings** > **XR Plug-in Management** > **OpenXR** > Add Interaction profiles for your device.
+3. **Edit** > **Project Settings** > **XR Plug-in Management** > **OpenXR** > Select **Hand Tracking** under **VIVE OpenXR** Feature Groups.
+4. In the Unity Project window, select the sample scene file in **Assets** > **Samples** > **VIVE OpenXR Plugin - Windows** > **1.0.12** > **HandTracking Example** > **Scenes** > **HandTrackingScene.unity** then click Play.
+
+## Use VIVE OpenXR Hand Tracking Unity Feature to draw skeleton hand.
+1. Import VIVE OpenXR Plugin - Windows
+2. Add Hand gameobject to the Unity scene
+    - Refer to functions **StartFrameWork** and **StopFrameWork** in **HandManager.cs** for creating and releasing handle for hand.
+    - Refer to the function **GetJointLocation** in **HandManager.cs** for getting the information to locate hand joints.
+    - Drag "SkeletonHand" prefab into scene hierarchy or Create an empty object and attach **RenderHand.cs**.
+
+## Use VIVE OpenXR Hand Tracking Unity Feature to draw 3D hand.
+1. Import VIVE OpenXR Plugin - Windows
+2. Add Hand gameobject to the Unity scene
+    - Refer to functions **StartFrameWork** and **StopFrameWork** in **HandManager.cs** for creating and releasing handle for hand.
+    - Refer to the function **GetJointLocation** in **HandManager.cs** for getting the information to locate hand joints.
+    - Drag "3DHand" prefab into scene hierarchy or attach **RenderModel.cs** to "ObjModelHandLeft_26.fbx" and "ObjModelHandRight_26.fbx".
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Readme.md.meta
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scenes.meta
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scenes/HandTrackingScene.unity
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scenes/HandTrackingScene.unity
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scenes/HandTrackingScene.unity.meta
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts.meta
@@ -0,0 +1,8 @@
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/ActionAssetEnabler.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/ActionAssetEnabler.cs
@@ -0,0 +1,24 @@
+using UnityEngine.InputSystem;
+
+namespace UnityEngine.XR.OpenXR.Samples.ControllerSample
+{
+    public class ActionAssetEnabler : MonoBehaviour
+    {
+        [SerializeField]
+        InputActionAsset m_ActionAsset;
+        public InputActionAsset actionAsset
+        {
+            get => m_ActionAsset;
+            set => m_ActionAsset = value;
+        }
+
+        private void OnEnable()
+        {
+            if(m_ActionAsset != null)
+            {
+                m_ActionAsset.Enable();
+            }
+        }
+
+    }
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/ActionAssetEnabler.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/ActionAssetEnabler.cs.meta
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--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/Controller.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/Controller.cs
@@ -0,0 +1,83 @@
+using System;
+using UnityEngine.InputSystem;
+using UnityEngine.UI;
+using UnityEngine;
+
+public class Controller : MonoBehaviour
+{
+    [SerializeField]
+    private InputActionReference m_ActionReferenceTrigger;
+    public InputActionReference actionReferenceTrigger { get => m_ActionReferenceTrigger ; set => m_ActionReferenceTrigger=value; }
+
+    public TextMesh pinchValue;
+    //[SerializeField]
+    //private InputActionReference m_ActionReferenceGrip;
+    //public InputActionReference actionReferenceGrip { get => m_ActionReferenceGrip ; set => m_ActionReferenceGrip=value; }
+
+    Type lastActiveType_Trigger = null;
+
+    // Update is called once per frame
+    void Update()
+    {
+        pinchValue.text = "0";
+        if ( actionReferenceTrigger != null && actionReferenceTrigger.action != null 
+            && actionReferenceTrigger.action.enabled && actionReferenceTrigger.action.controls.Count > 0
+            /*&& actionReferenceGrip != null && actionReferenceGrip.action != null
+            && actionReferenceGrip.action.enabled && actionReferenceGrip.action.controls.Count > 0*/)
+        {
+            // Grip
+            //Type typeToUse_Grip = null;
+            //if(actionReferenceGrip.action.activeControl != null)
+            //{
+            //    typeToUse_Grip = actionReferenceGrip.action.activeControl.valueType;
+            //}
+            //else
+            //{
+            //    typeToUse_Grip = lastActiveType_Grip;
+            //}
+
+            //if(typeToUse_Grip == typeof(float))
+            //{
+            //    lastActiveType_Grip = typeof(float);
+            //    float value = actionReferenceGrip.action.ReadValue<float>();
+            //    if(value > 0.5)
+            //    {
+            //        if(!isSwitchedMeshPrefab)
+            //        {
+            //            isSwitchedMeshPrefab = true;
+            //            Debug.Log("Press Button B.");
+            //            //if(MeshSubSystem != null)
+            //            //{
+            //            //    MeshSubSystem.GetComponent<UnityEngine.XR.OpenXR.Samples.MeshingFeature.MeshingBehaviour>().SwitchMeshPrefab(); 
+            //            //}
+            //        }
+            //    }
+            //    else
+            //    {
+            //        isSwitchedMeshPrefab = false;
+            //    }
+            //}
+
+            // Trigger
+            Type typeToUse_Trigger = null;
+            if(actionReferenceTrigger.action.activeControl != null)
+            {
+                typeToUse_Trigger = actionReferenceTrigger.action.activeControl.valueType;
+            }
+            else
+            {
+                typeToUse_Trigger = lastActiveType_Trigger;
+            }
+
+            if(typeToUse_Trigger == typeof(float))
+            {
+                lastActiveType_Trigger = typeof(float);
+                float value = actionReferenceTrigger.action.ReadValue<float>();
+                pinchValue.text = value.ToString();
+
+            }
+
+        }
+    }
+
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/Controller.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/Controller.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 393fd0a40b85a9a4b981076df200a2f7
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/FrameWork.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/FrameWork.cs
@@ -0,0 +1,290 @@
+using System;
+using UnityEngine;
+using UnityEngine.XR.OpenXR;
+using VIVE.HandTracking;
+[Obsolete("Use HandManager instead")]
+public static class FrameWork
+{
+    private class HandData
+    {
+        public bool isStarted;
+        public XrHandEXT hand;
+        public ulong trackerHandle;
+        public bool isActive;
+        public int jointUpdatedFrame = -1;
+        public XrHandJointLocationEXT[] joints = new XrHandJointLocationEXT[(int)XrHandJointEXT.XR_HAND_JOINT_MAX_ENUM_EXT];
+        public XrHandJointVelocityEXT[] velocities = new XrHandJointVelocityEXT[(int)XrHandJointEXT.XR_HAND_JOINT_MAX_ENUM_EXT];
+
+        public bool isCreated { get { return trackerHandle != default; } }
+
+        public void ClearJoints()
+        {
+            Array.Clear(joints, 0, joints.Length);
+            Array.Clear(velocities, 0, velocities.Length);
+        }
+    }
+
+    private static HandTracking_OpenXR_API feature;
+    private static bool isInitialized;
+    private static bool isSystemSupported;
+    private static ulong refSpace;
+    private static HandData leftHandData = new HandData() { hand = XrHandEXT.XR_HAND_LEFT_EXT };
+    private static HandData rightHandData = new HandData() { hand = XrHandEXT.XR_HAND_RIGHT_EXT };
+
+    private static bool isRefSpaceCreated { get { return refSpace != default; } }
+
+    private static HandData GetHandData(bool isLeft)
+    {
+        return isLeft ? leftHandData : rightHandData;
+    }
+
+    public static bool Initialize()
+    {
+        if (!isInitialized)
+        {
+            if (feature == null)
+            {
+                feature = OpenXRSettings.Instance.GetFeature<HandTracking_OpenXR_API>();
+
+                if (feature != null)
+                {
+                    // FIXME: Assume featuer instance won't be destroied and created to a new one
+                    feature.onSessionCreate += OnFeatureSessionCreate;
+                    feature.onSessionDestroy += OnFeatureSessionDestroy;
+                    feature.onSystemChange += OnFeatureSystemChange;
+                }
+            }
+
+            if (feature != null && feature.IsEnabledAndInitialized)
+            {
+                UpdateSystemSupported();
+                isInitialized = true;
+            }
+        }
+
+        return isInitialized;
+    }
+
+    private static void OnFeatureSessionCreate(ulong xrSession)
+    {
+        TryCreateHandTracker(leftHandData);
+        TryCreateHandTracker(rightHandData);
+    }
+
+    private static void OnFeatureSessionDestroy(ulong xrSession)
+    {
+        DestroyHandTracker(leftHandData);
+        DestroyHandTracker(rightHandData);
+        DestroyRefSpace();
+    }
+
+    private static void OnFeatureSystemChange(ulong systemId)
+    {
+        UpdateSystemSupported();
+    }
+
+    private static void UpdateSystemSupported()
+    {
+        if (feature == null || !feature.IsEnabledAndInitialized)
+        {
+            isSystemSupported = false;
+        }
+        else
+        {
+            isSystemSupported = feature.SystemSupportsHandTracking(out var result);
+
+            if (!isSystemSupported)
+            {
+                if (result != XrResult.XR_SUCCESS)
+                {
+                    Debug.LogWarning("Fail SystemSupportsHandTracking: " + result);
+                }
+                else
+                {
+                    Debug.LogWarning("Hand tracking not supported by the system");
+                }
+            }
+        }
+    }
+
+    private static bool TryCreateHandTracker(HandData handData)
+    {
+        if (!handData.isStarted) { return false; }
+        if (!Initialize()) { return false; }
+        if (!isSystemSupported) { return false; }
+        if (!feature.IsSessionCreated) { return false; }
+
+        if (!handData.isCreated)
+        {
+            if (!feature.TryCreateHandTracker(handData.hand, out handData.trackerHandle, out var result))
+            {
+                handData.trackerHandle = default;
+                Debug.LogWarning("Fail CreateHandTracker: " + result);
+            }
+        }
+
+        return handData.isCreated;
+    }
+
+    private static void DestroyHandTracker(HandData handData)
+    {
+        if (!handData.isCreated) { return; }
+        if (!Initialize()) { return; }
+
+        feature.TryDestroyHandTracker(handData.trackerHandle, out _);
+        handData.trackerHandle = default;
+        handData.ClearJoints();
+    }
+
+    private static bool InitializeRefSpace()
+    {
+        if (!Initialize()) { return false; }
+        if (!isSystemSupported) { return false; }
+        if (!feature.IsSessionCreated) { return false; }
+
+        if (!isRefSpaceCreated)
+        {
+            const XrReferenceSpaceType preferSpaceType = XrReferenceSpaceType.XR_REFERENCE_SPACE_TYPE_STAGE;
+            XrReferenceSpaceType spaceType;
+            if (!feature.TryGetSupportedReferenceSpaceType(preferSpaceType, out spaceType, out var result))
+            {
+                Debug.LogWarning("Fail GetSupportedReferenceSpaceType: " + result);
+            }
+            else
+            {
+                if (!feature.TryCreateReferenceSpace(
+                     spaceType,
+                     new XrVector3f(0f, 0f, 0f),
+                     new XrQuaternionf(0f, 0f, 0f, 1f),
+                     out refSpace,
+                     out result))
+                {
+                    refSpace = default;
+                    Debug.LogWarning("Fail CreateReferenceSpace: " + result);
+                }
+            }
+        }
+
+        return isRefSpaceCreated;
+    }
+
+    private static void DestroyRefSpace()
+    {
+        if (!isRefSpaceCreated) { return; }
+
+        if (Initialize())
+        {
+            if (!feature.TryDestroyReferenceSpace(refSpace, out var result))
+            {
+                Debug.LogWarning("Fail DestroyReferenceSpace: " + result);
+            }
+        }
+
+        refSpace = default;
+    }
+
+    public static void StartFrameWork(bool isLeft)
+    {
+        var handData = GetHandData(isLeft);
+        handData.isStarted = true;
+
+        TryCreateHandTracker(handData);
+    }
+
+    public static void StopFrameWork(bool isLeft)
+    {
+        var handData = GetHandData(isLeft);
+        handData.isStarted = false;
+
+        DestroyHandTracker(handData);
+    }
+
+    public static bool GetJointLocation(bool isleft, out XrHandJointLocationEXT[] joints, bool forceUpdate = false)
+    {
+        var handData = GetHandData(isleft);
+        if (handData.isCreated)
+        {
+            if (forceUpdate || handData.jointUpdatedFrame != Time.frameCount)
+            {
+                handData.jointUpdatedFrame = Time.frameCount;
+
+                if (InitializeRefSpace())
+                {
+                    if (!feature.TryLocateHandJoints(
+                        handData.trackerHandle,
+                        refSpace,
+                        out handData.isActive,
+                        handData.joints,
+                        out var result))
+                    {
+                        handData.isActive = false;
+                        Debug.LogWarning("Fail LocateHandJoints: " + result);
+                    }
+                }
+            }
+        }
+
+        joints = handData.joints;
+        return handData.isActive;
+    }
+
+    public static bool GetJointLocation(bool isleft, out XrHandJointLocationEXT[] joints,ref XrHandJointsMotionRangeEXT type, bool forceUpdate = false)
+    {
+        var handData = GetHandData(isleft);
+        if (handData.isCreated)
+        {
+            if (forceUpdate || handData.jointUpdatedFrame != Time.frameCount)
+            {
+                handData.jointUpdatedFrame = Time.frameCount;
+
+                if (InitializeRefSpace())
+                {
+                    if (!feature.TryLocateHandJoints(
+                        handData.trackerHandle,
+                        refSpace,
+                        ref type,
+                        out handData.isActive,
+                        handData.joints,
+                        out var result))
+                    {
+                        handData.isActive = false;
+                        Debug.LogWarning("Fail LocateHandJoints: " + result);
+                    }
+                }
+            }
+        }
+        joints = handData.joints;
+        return handData.isActive;
+    }
+
+    public static bool GetJointLocation(bool isleft, out XrHandJointLocationEXT[] joints, out XrHandJointVelocityEXT[] velocities, bool forceUpdate = false)
+    {
+        var handData = GetHandData(isleft);
+        if (handData.isCreated)
+        {
+            if (forceUpdate || handData.jointUpdatedFrame != Time.frameCount)
+            {
+                handData.jointUpdatedFrame = Time.frameCount;
+
+                if (InitializeRefSpace())
+                {
+                    if (!feature.TryLocateHandJoints(
+                        handData.trackerHandle,
+                        refSpace,
+                        out handData.isActive,
+                        handData.joints,
+                        handData.velocities,
+                        out var result))
+                    {
+                        handData.isActive = false;
+                        Debug.LogWarning("Fail LocateHandJoints: " + result);
+                    }
+                }
+            }
+        }
+
+        joints = handData.joints;
+        velocities = handData.velocities;
+        return handData.isActive;
+    }
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/FrameWork.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/FrameWork.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 89e4cae3bc180f14c906224f93d20210
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/InputMaster.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/InputMaster.cs
@@ -0,0 +1,152 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was auto-generated by com.unity.inputsystem:InputActionCodeGenerator
+//     version 1.4.1
+//     from Assets/Samples/VIVE OpenXR Plugin - Windows/1.0.12/HandTracking Example/Scripts/InputMaster.inputactions
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine.InputSystem;
+using UnityEngine.InputSystem.Utilities;
+
+public partial class @InputMaster : IInputActionCollection2, IDisposable
+{
+    public InputActionAsset asset { get; }
+    public @InputMaster()
+    {
+        asset = InputActionAsset.FromJson(@"{
+    ""name"": ""InputMaster"",
+    ""maps"": [
+        {
+            ""name"": ""Keyboard"",
+            ""id"": ""94ee31f8-c9ac-4138-b5b9-ad5ecec1870d"",
+            ""actions"": [
+                {
+                    ""name"": ""SpacePress"",
+                    ""type"": ""Button"",
+                    ""id"": ""2a246a3d-969f-4d95-8e12-9e0000e5b19c"",
+                    ""expectedControlType"": ""Button"",
+                    ""processors"": """",
+                    ""interactions"": """",
+                    ""initialStateCheck"": false
+                }
+            ],
+            ""bindings"": [
+                {
+                    ""name"": """",
+                    ""id"": ""d6ea233e-905c-4913-a644-8a84098fea9f"",
+                    ""path"": ""<Keyboard>/space"",
+                    ""interactions"": """",
+                    ""processors"": """",
+                    ""groups"": """",
+                    ""action"": ""SpacePress"",
+                    ""isComposite"": false,
+                    ""isPartOfComposite"": false
+                }
+            ]
+        }
+    ],
+    ""controlSchemes"": []
+}");
+        // Keyboard
+        m_Keyboard = asset.FindActionMap("Keyboard", throwIfNotFound: true);
+        m_Keyboard_SpacePress = m_Keyboard.FindAction("SpacePress", throwIfNotFound: true);
+    }
+
+    public void Dispose()
+    {
+        UnityEngine.Object.Destroy(asset);
+    }
+
+    public InputBinding? bindingMask
+    {
+        get => asset.bindingMask;
+        set => asset.bindingMask = value;
+    }
+
+    public ReadOnlyArray<InputDevice>? devices
+    {
+        get => asset.devices;
+        set => asset.devices = value;
+    }
+
+    public ReadOnlyArray<InputControlScheme> controlSchemes => asset.controlSchemes;
+
+    public bool Contains(InputAction action)
+    {
+        return asset.Contains(action);
+    }
+
+    public IEnumerator<InputAction> GetEnumerator()
+    {
+        return asset.GetEnumerator();
+    }
+
+    IEnumerator IEnumerable.GetEnumerator()
+    {
+        return GetEnumerator();
+    }
+
+    public void Enable()
+    {
+        asset.Enable();
+    }
+
+    public void Disable()
+    {
+        asset.Disable();
+    }
+    public IEnumerable<InputBinding> bindings => asset.bindings;
+
+    public InputAction FindAction(string actionNameOrId, bool throwIfNotFound = false)
+    {
+        return asset.FindAction(actionNameOrId, throwIfNotFound);
+    }
+    public int FindBinding(InputBinding bindingMask, out InputAction action)
+    {
+        return asset.FindBinding(bindingMask, out action);
+    }
+
+    // Keyboard
+    private readonly InputActionMap m_Keyboard;
+    private IKeyboardActions m_KeyboardActionsCallbackInterface;
+    private readonly InputAction m_Keyboard_SpacePress;
+    public struct KeyboardActions
+    {
+        private @InputMaster m_Wrapper;
+        public KeyboardActions(@InputMaster wrapper) { m_Wrapper = wrapper; }
+        public InputAction @SpacePress => m_Wrapper.m_Keyboard_SpacePress;
+        public InputActionMap Get() { return m_Wrapper.m_Keyboard; }
+        public void Enable() { Get().Enable(); }
+        public void Disable() { Get().Disable(); }
+        public bool enabled => Get().enabled;
+        public static implicit operator InputActionMap(KeyboardActions set) { return set.Get(); }
+        public void SetCallbacks(IKeyboardActions instance)
+        {
+            if (m_Wrapper.m_KeyboardActionsCallbackInterface != null)
+            {
+                @SpacePress.started -= m_Wrapper.m_KeyboardActionsCallbackInterface.OnSpacePress;
+                @SpacePress.performed -= m_Wrapper.m_KeyboardActionsCallbackInterface.OnSpacePress;
+                @SpacePress.canceled -= m_Wrapper.m_KeyboardActionsCallbackInterface.OnSpacePress;
+            }
+            m_Wrapper.m_KeyboardActionsCallbackInterface = instance;
+            if (instance != null)
+            {
+                @SpacePress.started += instance.OnSpacePress;
+                @SpacePress.performed += instance.OnSpacePress;
+                @SpacePress.canceled += instance.OnSpacePress;
+            }
+        }
+    }
+    public KeyboardActions @Keyboard => new KeyboardActions(this);
+    public interface IKeyboardActions
+    {
+        void OnSpacePress(InputAction.CallbackContext context);
+    }
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/InputMaster.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/InputMaster.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 00c2bfc723925654087046942f18ab09
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/InputMaster.inputactions
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/InputMaster.inputactions
@@ -0,0 +1,34 @@
+{
+    "name": "InputMaster",
+    "maps": [
+        {
+            "name": "Keyboard",
+            "id": "94ee31f8-c9ac-4138-b5b9-ad5ecec1870d",
+            "actions": [
+                {
+                    "name": "SpacePress",
+                    "type": "Button",
+                    "id": "2a246a3d-969f-4d95-8e12-9e0000e5b19c",
+                    "expectedControlType": "Button",
+                    "processors": "",
+                    "interactions": "",
+                    "initialStateCheck": false
+                }
+            ],
+            "bindings": [
+                {
+                    "name": "",
+                    "id": "d6ea233e-905c-4913-a644-8a84098fea9f",
+                    "path": "<Keyboard>/space",
+                    "interactions": "",
+                    "processors": "",
+                    "groups": "",
+                    "action": "SpacePress",
+                    "isComposite": false,
+                    "isPartOfComposite": false
+                }
+            ]
+        }
+    ],
+    "controlSchemes": []
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/InputMaster.inputactions.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/InputMaster.inputactions.meta
@@ -0,0 +1,14 @@
+fileFormatVersion: 2
+guid: d8c42cba5f401b94db94490595c0f4df
+ScriptedImporter:
+  internalIDToNameTable: []
+  externalObjects: {}
+  serializedVersion: 2
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 11500000, guid: 8404be70184654265930450def6a9037, type: 3}
+  generateWrapperCode: 1
+  wrapperCodePath: 
+  wrapperClassName: 
+  wrapperCodeNamespace: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/LineRender.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/LineRender.cs
@@ -0,0 +1,39 @@
+using System;
+using UnityEngine.InputSystem;
+using UnityEngine.UI;
+using UnityEngine;
+
+
+public class LineRender : MonoBehaviour
+{
+    [Tooltip("Root object of Line mesh")]
+    public GameObject Line = null;
+    [SerializeField] private LineRenderer GazeRayRenderer;
+
+    [SerializeField]
+    private InputActionReference m_ActionReferencePose;
+    public InputActionReference actionReferencePose { get => m_ActionReferencePose; set => m_ActionReferencePose = value; }
+
+    // Update is called once per frame
+    void Update()
+    {
+        Vector3 DirectionCombinedLocal;
+        if (actionReferencePose != null && actionReferencePose.action != null
+            && actionReferencePose.action.enabled && actionReferencePose.action.controls.Count > 0)
+        {
+            //GazeRayRenderer.SetActive(true);
+            UnityEngine.XR.OpenXR.Input.Pose poseval = actionReferencePose.action.ReadValue<UnityEngine.XR.OpenXR.Input.Pose>();
+            Quaternion gazeRotation = poseval.rotation;
+            Quaternion orientation = new Quaternion(
+                1 * (gazeRotation.x),
+                1 * (gazeRotation.y),
+                1 * gazeRotation.z,
+                1 * gazeRotation.w);
+            DirectionCombinedLocal = orientation * Vector3.forward;
+            Vector3 DirectionCombined = Camera.main.transform.TransformDirection(DirectionCombinedLocal);
+            GazeRayRenderer.SetPosition(0, poseval.position);
+            GazeRayRenderer.SetPosition(1, poseval.position + DirectionCombinedLocal * 4);
+        }
+    }
+
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/LineRender.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/LineRender.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 1f20223b10be10d478250a03bb7ae27f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/ReadOnlyDrawer.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/ReadOnlyDrawer.cs
@@ -0,0 +1,28 @@
+using UnityEditor;
+using UnityEngine;
+
+namespace VIVE.HandTracking.Sample
+{
+    public class ReadOnlyAttribute : PropertyAttribute
+    {
+
+    }
+
+#if UNITY_EDITOR
+    [CustomPropertyDrawer(typeof(ReadOnlyAttribute))]
+    public class ReadOnlyDrawer : PropertyDrawer
+    {
+        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
+        {
+            return EditorGUI.GetPropertyHeight(property, label, true);
+        }
+
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            GUI.enabled = false;
+            EditorGUI.PropertyField(position, property, label, true);
+            GUI.enabled = true;
+        }
+    }
+#endif
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/ReadOnlyDrawer.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/ReadOnlyDrawer.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a85838490cd239847a9f06ea17789601
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/RenderHand.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/RenderHand.cs
@@ -0,0 +1,190 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using VIVE.HandTracking;
+
+namespace VIVE.HandTracking.Sample
+{
+    public class RenderHand : MonoBehaviour
+    {
+        // Links between keypoints, 2*i & 2*i+1 forms a link.
+        // keypoint index: 1: palm, 2-5: thumb, 6-10: index, 11-15: middle, 16-20: ring, 21-25: pinky
+        // fingers are counted from bottom to top
+        private static int[] Connections = new int[] {
+    1,  2,  1,  6,  1,  11, 1,  16, 1, 21,  // palm and finger starts
+    2,  6,  6,  11, 11, 16, 16, 21,         // finger starts
+    2,  3,  3,  4,  4,  5,                  // thumb
+    6,  7,  7,  8,  8,  9,  9,  10,                  // index
+    11, 12, 12, 13, 13, 14, 14, 15,                 // middle
+    16, 17, 17, 18, 18, 19, 19, 20,                // ring
+    21, 22, 22, 23, 23, 24, 24, 25                 // pinky
+  };
+        [Tooltip("Draw left hand if true, right hand otherwise")]
+        public bool isLeft = false;
+        [Tooltip("Use inferred or last-known posed when hand loses tracking if true.")]
+        public bool allowUntrackedPose = false;
+        [Tooltip("Default color of hand points")]
+        public Color pointColor = Color.green;
+        [Tooltip("Default color of links between keypoints in skeleton mode")]
+        public Color linkColor = Color.white;
+        [Tooltip("Material for hand points and links")]
+        [SerializeField]
+        private Material material = null;
+        private XrHandJointsMotionRangeEXT MotionType = XrHandJointsMotionRangeEXT.XR_HAND_JOINTS_MOTION_RANGE_MAX_ENUM_EXT;
+        [Tooltip("Type of hand joints range of motion")]
+        [ReadOnly] public string HandJointsMotionRange;
+
+        private List<GameObject> points = new List<GameObject>();
+        // list of links created (only for skeleton)
+        private List<GameObject> links = new List<GameObject>();
+        // Start is called before the first frame update
+        private XrHandJointLocationEXT[] HandjointLocations = new
+            XrHandJointLocationEXT[(int)XrHandJointEXT.XR_HAND_JOINT_MAX_ENUM_EXT];
+        // shared material for all point objects
+        private Material pointMat = null;
+        // shared material for all link objects
+        private Material linkMat = null;
+        private void Start()
+        {
+            HandManager.StartFrameWork(isLeft);
+            pointMat = new Material(material);
+            if (isLeft)
+            {
+                pointColor = Color.blue;
+            }
+            else
+            {
+                pointColor = Color.red;
+            }
+            pointMat.color = pointColor;
+            linkMat = new Material(material);
+            linkMat.color = linkColor;
+
+            for (int i = 0; i < (int)XrHandJointEXT.XR_HAND_JOINT_MAX_ENUM_EXT; i++)
+            {
+                var go = GameObject.CreatePrimitive(PrimitiveType.Sphere);
+                go.name = ((XrHandJointEXT)i).ToString();
+                go.transform.parent = transform;
+                go.transform.localScale = Vector3.one * 0.012f;
+                go.SetActive(false);
+                points.Add(go);
+                go.transform.position = new Vector3((float)i * 0.1f, 0, 0);
+                // handle layer
+                go.layer = gameObject.layer;
+                // handle material
+                go.GetComponent<Renderer>().sharedMaterial = pointMat;
+            }
+
+            // create game objects for links between keypoints, only used in skeleton mode
+            for (int i = 0; i < Connections.Length; i += 2)
+            {
+                var go = GameObject.CreatePrimitive(PrimitiveType.Cylinder);
+                go.name = "link" + i;
+                go.transform.parent = transform;
+                go.transform.localScale = Vector3.one * 0.005f;
+                go.SetActive(false);
+                links.Add(go);
+                // handle layer
+                go.layer = gameObject.layer;
+                // handle material
+                go.GetComponent<Renderer>().sharedMaterial = linkMat;
+            }
+        }
+        // Update is called once per frame
+        private void Update()
+        {
+            if (HandManager.GetJointLocation(isLeft, out HandjointLocations, ref MotionType))
+            {
+                UpdateJointLocation();
+                switch (MotionType)
+                {
+                    case XrHandJointsMotionRangeEXT.XR_HAND_JOINTS_MOTION_RANGE_UNOBSTRUCTED_EXT:
+                        HandJointsMotionRange = "UNOBSTRUCTED";
+                        break;
+                    case XrHandJointsMotionRangeEXT.XR_HAND_JOINTS_MOTION_RANGE_CONFORMING_TO_CONTROLLER_EXT:
+                        HandJointsMotionRange = "CONTROLLER";
+                        break;
+                    default:
+                        HandJointsMotionRange = "";
+                        break;
+                }
+            }
+            else
+            {
+                for (int i = 0; i < points.Count; i++)
+                {
+                    var go = points[i];
+                    go.SetActive(false);
+                }
+
+                for (int i = 0; i < links.Count; i++)
+                {
+                    var link = links[i];
+                    link.SetActive(false);
+                }
+            }
+        }
+
+        private void UpdateJointLocation()
+        {
+            for (int i = 0; i < points.Count; i++)
+            {
+                var go = points[i];
+                XrQuaternionf orientation;
+                XrVector3f position;
+                float radius = HandjointLocations[i].radius;
+                if (allowUntrackedPose) //Use inferred or last-known pose when lost tracking 
+                {
+                    orientation = HandjointLocations[i].pose.orientation;
+                    position = HandjointLocations[i].pose.position;
+                    go.transform.localPosition = new Vector3(position.x, position.y, -position.z);
+                    go.SetActive(true);
+                }
+                else
+                {
+                    if ((HandjointLocations[i].locationFlags & (ulong)XrSpaceLocationFlags.XR_SPACE_LOCATION_ORIENTATION_TRACKED_BIT) != 0)
+                    {
+                        orientation = HandjointLocations[i].pose.orientation;
+                    }
+                    if ((HandjointLocations[i].locationFlags & (ulong)XrSpaceLocationFlags.XR_SPACE_LOCATION_POSITION_TRACKED_BIT) != 0)
+                    {
+                        position = HandjointLocations[i].pose.position;
+                        go.transform.localPosition = new Vector3(position.x, position.y, -position.z);
+                        go.SetActive(true);
+                    }
+                    else
+                    {
+                        UnityEngine.Debug.Log("Lost tracking");
+                        go.SetActive(false);
+                    }
+                }
+            }
+
+            for (int i = 0; i < links.Count; i++)
+            {
+                var link = links[i];
+                var pose1 = points[Connections[i * 2]].transform.position;
+                var pose2 = points[Connections[i * 2 + 1]].transform.position;
+
+                // calculate link position and rotation based on points on both end
+                link.SetActive(true);
+                link.transform.position = (pose1 + pose2) / 2;
+                var direction = pose2 - pose1;
+                link.transform.rotation = Quaternion.FromToRotation(Vector3.up, direction);
+                link.transform.localScale = new Vector3(0.006f, direction.magnitude / 2f - 0.0051f, 0.006f);
+            }
+
+        }
+        private void OnDestroy()
+        {
+            HandManager.StopFrameWork(isLeft);
+            UnityEngine.Debug.Log("OnDestroy");
+        }
+
+        //public void setHandVisible(bool isVisible)
+        //{
+        //    Hand.SetActive(isVisible);
+        //}
+    }
+
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/RenderHand.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/RenderHand.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8c57cc3ae07bcce42ba395c288cba794
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/RenderModel.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/RenderModel.cs
@@ -0,0 +1,78 @@
+using UnityEngine;
+using VIVE.HandTracking;
+
+namespace VIVE.HandTracking.Sample
+{
+    public class RenderModel : MonoBehaviour
+    {
+        private readonly Quaternion zBackModelRotFix = Quaternion.AngleAxis(180f, Vector3.up);
+
+        public Transform[] nodes = new Transform[(int)XrHandJointEXT.XR_HAND_JOINT_MAX_ENUM_EXT];
+        [Tooltip("Draw left hand if true, right hand otherwise")]
+        public bool isLeft = false;
+        [Tooltip("Use inferred or last-known posed when hand loses tracking if true.")]
+        public bool allowUntrackedPose = false;
+        [Tooltip("Root object of skinned mesh")]
+        public GameObject Hand = null;
+        private XrHandJointsMotionRangeEXT MotionType = XrHandJointsMotionRangeEXT.XR_HAND_JOINTS_MOTION_RANGE_MAX_ENUM_EXT;
+        [Tooltip("Type of hand joints range of motion")]
+        [ReadOnly]public string HandJointsMotionRange;
+
+
+        // Start is called before the first frame update
+        private void Start()
+        {
+            HandManager.StartFrameWork(isLeft);
+        }
+
+        // Update is called once per frame
+        private void Update()
+        {
+            if (HandManager.GetJointLocation(isLeft, out var joints, ref MotionType))
+            {
+                setHandVisible(true);
+
+                for (int i = (int)XrHandJointEXT.XR_HAND_JOINT_PALM_EXT; i < (int)XrHandJointEXT.XR_HAND_JOINT_MAX_ENUM_EXT; i++)
+                {
+                    var posValid = (joints[i].locationFlags & (ulong)XrSpaceLocationFlags.XR_SPACE_LOCATION_POSITION_VALID_BIT) != 0;
+                    var posTracked = (joints[i].locationFlags & (ulong)XrSpaceLocationFlags.XR_SPACE_LOCATION_POSITION_TRACKED_BIT) != 0;
+                    var rotValid = (joints[i].locationFlags & (ulong)XrSpaceLocationFlags.XR_SPACE_LOCATION_ORIENTATION_VALID_BIT) != 0;
+                    var rotTracked = (joints[i].locationFlags & (ulong)XrSpaceLocationFlags.XR_SPACE_LOCATION_ORIENTATION_TRACKED_BIT) != 0;
+
+                    var pos = new Vector3(joints[i].pose.position.x, joints[i].pose.position.y, -joints[i].pose.position.z);
+                    var rot = new Quaternion(-joints[i].pose.orientation.x, -joints[i].pose.orientation.y, joints[i].pose.orientation.z, joints[i].pose.orientation.w) * zBackModelRotFix;
+
+                    if (posValid && (allowUntrackedPose || posTracked)) { nodes[i].position = transform.TransformPoint(pos); }
+                    if (rotValid && (allowUntrackedPose || rotTracked)) { nodes[i].rotation = transform.rotation * rot; }
+                }
+                switch (MotionType)
+                {
+                    case XrHandJointsMotionRangeEXT.XR_HAND_JOINTS_MOTION_RANGE_UNOBSTRUCTED_EXT:
+                        HandJointsMotionRange = "UNOBSTRUCTED";
+                        break;
+                    case XrHandJointsMotionRangeEXT.XR_HAND_JOINTS_MOTION_RANGE_CONFORMING_TO_CONTROLLER_EXT:
+                        HandJointsMotionRange = "CONTROLLER";
+                        break;
+                    default:
+                        HandJointsMotionRange = "";
+                        break;
+                }
+            }
+            else
+            {
+                setHandVisible(false);
+            }
+        }
+
+        private void OnDestroy()
+        {
+            HandManager.StopFrameWork(isLeft);
+        }
+
+        public void setHandVisible(bool isVisible)
+        {
+            Hand.SetActive(isVisible);
+        }
+    }
+
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/RenderModel.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/RenderModel.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: c19189c6a6028a74ab475048ebd154c8
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/SwitchHand.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/SwitchHand.cs
@@ -0,0 +1,46 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace VIVE.HandTracking.Sample
+{
+    public class SwitchHand : MonoBehaviour
+    {
+        public InputMaster inputMaster;
+        public GameObject hand3D;
+        public GameObject handSkeleton;
+        private bool isSwitch = false;
+        private void Awake()
+        {
+            inputMaster = new InputMaster();
+            inputMaster.Enable();
+        }
+        // Start is called before the first frame update
+        void Start()
+        {
+
+        }
+
+        // Update is called once per frame
+        void Update()
+        {
+            float ispressed = inputMaster.Keyboard.SpacePress.ReadValue<float>();
+            if (ispressed > 0.5)
+            {
+                if(!isSwitch)
+                {
+                    UnityEngine.Debug.Log("press space");
+                    hand3D.SetActive(!hand3D.activeSelf);
+                    handSkeleton.SetActive(!handSkeleton.activeSelf);
+                    isSwitch = true;
+                }
+            }
+            else
+            {
+                isSwitch = false;
+            }
+
+        }
+    }
+
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/SwitchHand.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Samples~/Scripts/SwitchHand.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 2642121393e03fd46ba257307ca9cb51
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Script.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Script.meta
@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 98067af793989634da2aed490cf3f25b
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Script/HandManager.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Script/HandManager.cs
@@ -0,0 +1,293 @@
+using System;
+using UnityEngine;
+using UnityEngine.XR.OpenXR;
+
+namespace VIVE.HandTracking
+{
+    public static class HandManager
+    {
+        private class HandData
+        {
+            public bool isStarted;
+            public XrHandEXT hand;
+            public ulong trackerHandle;
+            public bool isActive;
+            public int jointUpdatedFrame = -1;
+            public XrHandJointLocationEXT[] joints = new XrHandJointLocationEXT[(int)XrHandJointEXT.XR_HAND_JOINT_MAX_ENUM_EXT];
+            public XrHandJointVelocityEXT[] velocities = new XrHandJointVelocityEXT[(int)XrHandJointEXT.XR_HAND_JOINT_MAX_ENUM_EXT];
+
+            public bool isCreated { get { return trackerHandle != default; } }
+
+            public void ClearJoints()
+            {
+                Array.Clear(joints, 0, joints.Length);
+                Array.Clear(velocities, 0, velocities.Length);
+            }
+        }
+
+        private static HandTracking_OpenXR_API feature;
+        private static bool isInitialized;
+        private static bool isSystemSupported;
+        private static ulong refSpace;
+        private static HandData leftHandData = new HandData() { hand = XrHandEXT.XR_HAND_LEFT_EXT };
+        private static HandData rightHandData = new HandData() { hand = XrHandEXT.XR_HAND_RIGHT_EXT };
+
+        private static bool isRefSpaceCreated { get { return refSpace != default; } }
+
+        private static HandData GetHandData(bool isLeft)
+        {
+            return isLeft ? leftHandData : rightHandData;
+        }
+
+        public static bool Initialize()
+        {
+            if (!isInitialized)
+            {
+                if (feature == null)
+                {
+                    feature = OpenXRSettings.Instance.GetFeature<HandTracking_OpenXR_API>();
+
+                    if (feature != null)
+                    {
+                        // FIXME: Assume featuer instance won't be destroied and created to a new one
+                        feature.onSessionCreate += OnFeatureSessionCreate;
+                        feature.onSessionDestroy += OnFeatureSessionDestroy;
+                        feature.onSystemChange += OnFeatureSystemChange;
+                    }
+                }
+
+                if (feature != null && feature.IsEnabledAndInitialized)
+                {
+                    UpdateSystemSupported();
+                    isInitialized = true;
+                }
+            }
+
+            return isInitialized;
+        }
+
+        private static void OnFeatureSessionCreate(ulong xrSession)
+        {
+            TryCreateHandTracker(leftHandData);
+            TryCreateHandTracker(rightHandData);
+        }
+
+        private static void OnFeatureSessionDestroy(ulong xrSession)
+        {
+            DestroyHandTracker(leftHandData);
+            DestroyHandTracker(rightHandData);
+            DestroyRefSpace();
+        }
+
+        private static void OnFeatureSystemChange(ulong systemId)
+        {
+            UpdateSystemSupported();
+        }
+
+        private static void UpdateSystemSupported()
+        {
+            if (feature == null || !feature.IsEnabledAndInitialized)
+            {
+                isSystemSupported = false;
+            }
+            else
+            {
+                isSystemSupported = feature.SystemSupportsHandTracking(out var result);
+
+                if (!isSystemSupported)
+                {
+                    if (result != XrResult.XR_SUCCESS)
+                    {
+                        Debug.LogWarning("Fail SystemSupportsHandTracking: " + result);
+                    }
+                    else
+                    {
+                        Debug.LogWarning("Hand tracking not supported by the system");
+                    }
+                }
+            }
+        }
+
+        private static bool TryCreateHandTracker(HandData handData)
+        {
+            if (!handData.isStarted) { return false; }
+            if (!Initialize()) { return false; }
+            if (!isSystemSupported) { return false; }
+            if (!feature.IsSessionCreated) { return false; }
+
+            if (!handData.isCreated)
+            {
+                if (!feature.TryCreateHandTracker(handData.hand, out handData.trackerHandle, out var result))
+                {
+                    handData.trackerHandle = default;
+                    Debug.LogWarning("Fail CreateHandTracker: " + result);
+                }
+            }
+
+            return handData.isCreated;
+        }
+
+        private static void DestroyHandTracker(HandData handData)
+        {
+            if (!handData.isCreated) { return; }
+            if (!Initialize()) { return; }
+
+            feature.TryDestroyHandTracker(handData.trackerHandle, out _);
+            handData.trackerHandle = default;
+            handData.ClearJoints();
+        }
+
+        private static bool InitializeRefSpace()
+        {
+            if (!Initialize()) { return false; }
+            if (!isSystemSupported) { return false; }
+            if (!feature.IsSessionCreated) { return false; }
+
+            if (!isRefSpaceCreated)
+            {
+                const XrReferenceSpaceType preferSpaceType = XrReferenceSpaceType.XR_REFERENCE_SPACE_TYPE_STAGE;
+                XrReferenceSpaceType spaceType;
+                if (!feature.TryGetSupportedReferenceSpaceType(preferSpaceType, out spaceType, out var result))
+                {
+                    Debug.LogWarning("Fail GetSupportedReferenceSpaceType: " + result);
+                }
+                else
+                {
+                    if (!feature.TryCreateReferenceSpace(
+                         spaceType,
+                         new XrVector3f(0f, 0f, 0f),
+                         new XrQuaternionf(0f, 0f, 0f, 1f),
+                         out refSpace,
+                         out result))
+                    {
+                        refSpace = default;
+                        Debug.LogWarning("Fail CreateReferenceSpace: " + result);
+                    }
+                }
+            }
+
+            return isRefSpaceCreated;
+        }
+
+        private static void DestroyRefSpace()
+        {
+            if (!isRefSpaceCreated) { return; }
+
+            if (Initialize())
+            {
+                if (!feature.TryDestroyReferenceSpace(refSpace, out var result))
+                {
+                    Debug.LogWarning("Fail DestroyReferenceSpace: " + result);
+                }
+            }
+
+            refSpace = default;
+        }
+
+        public static void StartFrameWork(bool isLeft)
+        {
+            var handData = GetHandData(isLeft);
+            handData.isStarted = true;
+
+            TryCreateHandTracker(handData);
+        }
+
+        public static void StopFrameWork(bool isLeft)
+        {
+            var handData = GetHandData(isLeft);
+            handData.isStarted = false;
+
+            DestroyHandTracker(handData);
+        }
+
+        public static bool GetJointLocation(bool isleft, out XrHandJointLocationEXT[] joints, bool forceUpdate = false)
+        {
+            var handData = GetHandData(isleft);
+            if (handData.isCreated)
+            {
+                if (forceUpdate || handData.jointUpdatedFrame != Time.frameCount)
+                {
+                    handData.jointUpdatedFrame = Time.frameCount;
+
+                    if (InitializeRefSpace())
+                    {
+                        if (!feature.TryLocateHandJoints(
+                            handData.trackerHandle,
+                            refSpace,
+                            out handData.isActive,
+                            handData.joints,
+                            out var result))
+                        {
+                            handData.isActive = false;
+                            Debug.LogWarning("Fail LocateHandJoints: " + result);
+                        }
+                    }
+                }
+            }
+
+            joints = handData.joints;
+            return handData.isActive;
+        }
+
+        public static bool GetJointLocation(bool isleft, out XrHandJointLocationEXT[] joints, ref XrHandJointsMotionRangeEXT type, bool forceUpdate = false)
+        {
+            var handData = GetHandData(isleft);
+            if (handData.isCreated)
+            {
+                if (forceUpdate || handData.jointUpdatedFrame != Time.frameCount)
+                {
+                    handData.jointUpdatedFrame = Time.frameCount;
+
+                    if (InitializeRefSpace())
+                    {
+                        if (!feature.TryLocateHandJoints(
+                            handData.trackerHandle,
+                            refSpace,
+                            ref type,
+                            out handData.isActive,
+                            handData.joints,
+                            out var result))
+                        {
+                            handData.isActive = false;
+                            Debug.LogWarning("Fail LocateHandJoints: " + result);
+                        }
+                    }
+                }
+            }
+            joints = handData.joints;
+            return handData.isActive;
+        }
+
+        public static bool GetJointLocation(bool isleft, out XrHandJointLocationEXT[] joints, out XrHandJointVelocityEXT[] velocities, bool forceUpdate = false)
+        {
+            var handData = GetHandData(isleft);
+            if (handData.isCreated)
+            {
+                if (forceUpdate || handData.jointUpdatedFrame != Time.frameCount)
+                {
+                    handData.jointUpdatedFrame = Time.frameCount;
+
+                    if (InitializeRefSpace())
+                    {
+                        if (!feature.TryLocateHandJoints(
+                            handData.trackerHandle,
+                            refSpace,
+                            out handData.isActive,
+                            handData.joints,
+                            handData.velocities,
+                            out var result))
+                        {
+                            handData.isActive = false;
+                            Debug.LogWarning("Fail LocateHandJoints: " + result);
+                        }
+                    }
+                }
+            }
+
+            joints = handData.joints;
+            velocities = handData.velocities;
+            return handData.isActive;
+        }
+    }
+
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Script/HandManager.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Script/HandManager.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: ffbd7154b240117469bbc995d51d58a1
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Script/HandTracking_OpenXR_API.cs
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Script/HandTracking_OpenXR_API.cs
@@ -0,0 +1,429 @@
+using System;
+using System.Runtime.InteropServices;
+using UnityEditor;
+using UnityEngine.XR.OpenXR.Features;
+#if UNITY_EDITOR
+using UnityEditor.XR.OpenXR.Features;
+#endif
+
+namespace VIVE
+{
+    namespace HandTracking
+    {
+
+#if UNITY_EDITOR
+        [OpenXRFeature(UiName = "Hand Tracking",
+            BuildTargetGroups = new[] { BuildTargetGroup.Standalone },
+            Company = "HTC",
+            Desc = "Hand Tracking OpenXR Feature",
+            DocumentationLink = "https://developer.vive.com/resources/openxr/openxr-pcvr/tutorials/unity/how-integrate-hand-tracking-data-your-hand-model/",
+            OpenxrExtensionStrings = "XR_EXT_hand_tracking",
+            Version = "0.0.1",
+            FeatureId = featureId)]
+#endif
+        public class HandTracking_OpenXR_API : OpenXRFeature
+        {
+            /// <summary>
+            /// The feature id string. This is used to give the feature a well known id for reference.
+            /// </summary>
+            public const string featureId = "com.company.openxr.handtracking.feature";
+            private IntPtr oldxrGetInstanceProcAddr;
+            private IntPtr oldWaitFrame;
+            private ulong m_xrInstance;
+            private ulong m_xrSession;
+            private ulong m_systemId;
+            private XrFrameWaitInfo m_frameWaitInfo;
+            private XrFrameState m_frameState;
+
+            [Obsolete] public ulong m_space;
+            [Obsolete] public XrSystemProperties systemProperties;
+            [Obsolete] public ulong m_leftHandle;
+            [Obsolete] public ulong m_rightHandle;
+
+            public bool IsInitialized { get { return m_xrGetSystemProperties != null; } }
+            public bool IsEnabledAndInitialized { get { return enabled && IsInitialized; } }
+            public bool IsSessionCreated { get { return XrSession != default; } }
+            public ulong XrInstance { get { return m_xrInstance; } }
+            public ulong XrSession { get { return m_xrSession; } }
+            public ulong SystemId { get { return m_systemId; } }
+
+            public event Action<ulong> onSessionCreate;
+            public event Action<ulong> onSessionDestroy;
+            public event Action<ulong> onSystemChange;
+            protected override IntPtr HookGetInstanceProcAddr(IntPtr func)
+            {
+                UnityEngine.Debug.Log("EXT: registering our own xrGetInstanceProcAddr");
+                oldxrGetInstanceProcAddr = func;
+                m_intercept_xrWaitFrame_xrGetInstanceProcAddr = intercept_xrWaitFrame_xrGetInstanceProcAddr;
+                return Marshal.GetFunctionPointerForDelegate(m_intercept_xrWaitFrame_xrGetInstanceProcAddr);
+            }
+
+
+            private int intercept_xrWaitFrame_xrGetInstanceProcAddr(ulong instance, string name, out IntPtr function)
+            {
+                if (oldxrGetInstanceProcAddr == null || oldxrGetInstanceProcAddr == IntPtr.Zero)
+                {
+                    UnityEngine.Debug.LogError("oldxrGetInstanceProcAddr is null");
+                    function = IntPtr.Zero;
+                    return -1;
+                }
+
+                // Get delegate of old xrGetInstanceProcAddr.
+                var xrGetProc = Marshal.GetDelegateForFunctionPointer<xrGetInstanceProcDelegate>(oldxrGetInstanceProcAddr);
+
+                int result = xrGetProc(instance, name,out function);
+                if(name == "xrWaitFrame")
+                {
+                    oldWaitFrame = function;
+                    m_intercept_xrWaitFrame = intercepted_xrWaitFrame;
+                    function = Marshal.GetFunctionPointerForDelegate(m_intercept_xrWaitFrame); ;
+                    UnityEngine.Debug.Log("Getting xrWaitFrame func");
+                }
+                return result;
+
+            }
+
+            private int intercepted_xrWaitFrame(ulong session,ref XrFrameWaitInfo frameWaitInfo, ref XrFrameState frameState)
+            {
+                // Get delegate of old xrWaitFrame.
+                var xrWaitFrame = Marshal.GetDelegateForFunctionPointer<xrWaitFrameDelegate>(oldWaitFrame);
+                int res = xrWaitFrame(session, ref frameWaitInfo, ref  frameState);
+                m_frameWaitInfo = frameWaitInfo;
+                m_frameState = frameState;
+                return res;
+            }
+
+            /// <inheritdoc />
+            protected override bool OnInstanceCreate(ulong xrInstance)
+            {
+                UnityEngine.Debug.Log($"OnInstanceCreate({xrInstance:X})");
+                m_xrInstance = xrInstance;
+                return GetXrFunctionDelegates(xrInstance);
+            }
+
+            /// <inheritdoc />
+            protected override void OnInstanceDestroy(ulong xrInstance)
+            {
+                UnityEngine.Debug.Log($"OnInstanceDestroy({xrInstance:X})");
+                m_xrInstance = default;
+                //ClearXrFunctionDelegates();
+            }
+
+            /// <inheritdoc />
+            protected override void OnSessionCreate(ulong xrSession)
+            {
+                UnityEngine.Debug.Log($"OnSessionCreate({xrSession:X})");
+                m_xrSession = xrSession;
+
+                try { onSessionCreate?.Invoke(xrSession); }
+                catch (Exception e) { UnityEngine.Debug.LogError(e); }
+            }
+
+            /// <inheritdoc />
+            protected override void OnSystemChange(ulong xrSystem)
+            {
+                UnityEngine.Debug.Log($"OnSystemChange({xrSystem:X})");
+                m_systemId = xrSystem;
+
+                try { onSystemChange?.Invoke(xrSystem); }
+                catch (Exception e) { UnityEngine.Debug.LogError(e); }
+            }
+
+            /// <inheritdoc />
+            protected override void OnSessionDestroy(ulong xrSession)
+            {
+                UnityEngine.Debug.Log($"OnSessionDestroy({xrSession:X})");
+                m_xrSession = default;
+
+                try { onSessionDestroy?.Invoke(xrSession); }
+                catch (Exception e) { UnityEngine.Debug.LogError(e); }
+            }
+
+            /// <summary>Return true if the result equals zero. </summary>
+            private bool GetXrFunctionDelegates(ulong xrInstance)
+            {
+                if (xrGetInstanceProcAddr == null || xrGetInstanceProcAddr == IntPtr.Zero)
+                {
+                    UnityEngine.Debug.LogError("xrGetInstanceProcAddr is null");
+                    return false;
+                }
+
+                // Get delegate of xrGetInstanceProcAddr.
+                var xrGetProc = Marshal.GetDelegateForFunctionPointer<xrGetInstanceProcDelegate>(xrGetInstanceProcAddr);
+
+                if (!MarshelFunc(xrInstance, xrGetProc, "xrGetSystemProperties", ref m_xrGetSystemProperties)) { return false; }
+                if (!MarshelFunc(xrInstance, xrGetProc, "xrEnumerateReferenceSpaces", ref m_xrEnumerateReferenceSpaces)) { return false; }
+                if (!MarshelFunc(xrInstance, xrGetProc, "xrEnumerateReferenceSpaces", ref m_xrEnumerateReferenceSpaces2)) { return false; }
+                if (!MarshelFunc(xrInstance, xrGetProc, "xrCreateReferenceSpace", ref m_xrCreateReferenceSpace)) { return false; }
+                if (!MarshelFunc(xrInstance, xrGetProc, "xrDestroySpace", ref m_xrDestroySpace)) { return false; }
+                if (!MarshelFunc(xrInstance, xrGetProc, "xrCreateHandTrackerEXT", ref m_xrCreateHandTrackerEXT)) { return false; }
+                if (!MarshelFunc(xrInstance, xrGetProc, "xrDestroyHandTrackerEXT", ref m_xrDestroyHandTrackerEXT)) { return false; }
+                if (!MarshelFunc(xrInstance, xrGetProc, "xrLocateHandJointsEXT", ref m_xrLocateHandJointsEXT)) { return false; }
+                return true;
+            }
+
+            private void ClearXrFunctionDelegates()
+            {
+                m_xrGetSystemProperties = null;
+                m_xrEnumerateReferenceSpaces = null;
+                m_xrEnumerateReferenceSpaces2 = null;
+                m_xrCreateReferenceSpace = null;
+                m_xrDestroySpace = null;
+                m_xrCreateHandTrackerEXT = null;
+                m_xrDestroyHandTrackerEXT = null;
+                m_xrLocateHandJointsEXT = null;
+            }
+
+            private static bool MarshelFunc<T>(ulong instance, xrGetInstanceProcDelegate instanceProc, string funcName, ref T func, bool verbose = true)
+                where T : Delegate
+            {
+                if (instanceProc(instance, funcName, out var fp) != 0)
+                {
+                    if (verbose)
+                    {
+                        UnityEngine.Debug.LogError("Fail getting function " + funcName);
+                    }
+                    return false;
+                }
+
+                func = Marshal.GetDelegateForFunctionPointer<T>(fp);
+                return true;
+            }
+
+            private xrGetInstanceProcDelegate m_intercept_xrWaitFrame_xrGetInstanceProcAddr;
+
+            private delegate int xrGetSystemPropertiesDelegate(ulong instance, ulong systemId, ref XrSystemProperties properties);
+            private xrGetSystemPropertiesDelegate m_xrGetSystemProperties;
+            public int xrGetSystemProperties(ref XrSystemProperties properties) =>
+                m_xrGetSystemProperties(XrInstance, SystemId, ref properties);
+            public int xrGetSystemProperties(ulong instance, ulong systemId, ref XrSystemProperties properties) =>
+                m_xrGetSystemProperties(instance, systemId, ref properties);
+
+            private delegate int xrWaitFrameDelegate(ulong session,ref XrFrameWaitInfo frameWaitInfo, ref XrFrameState frameState);
+            private xrWaitFrameDelegate m_intercept_xrWaitFrame;
+            #region space
+            private delegate int xrEnumerateReferenceSpacesDelegate(ulong session, int spaceCapacityInput, out int spaceCountOutput, out XrReferenceSpaceType spaces);
+            private xrEnumerateReferenceSpacesDelegate m_xrEnumerateReferenceSpaces;
+            public int xrEnumerateReferenceSpaces(int spaceCapacityInput, out int spaceCountOutput, out XrReferenceSpaceType spaces) =>
+                m_xrEnumerateReferenceSpaces(XrSession, spaceCapacityInput, out spaceCountOutput, out spaces);
+
+            private delegate int xrEnumerateReferenceSpacesDelegate2(ulong session, int spaceCapacityInput, out int spaceCountOutput, IntPtr spaces);
+            private xrEnumerateReferenceSpacesDelegate2 m_xrEnumerateReferenceSpaces2;
+            public int xrEnumerateReferenceSpaces(ulong session, int spaceCapacityInput, out int spaceCountOutput, IntPtr spaces) =>
+                m_xrEnumerateReferenceSpaces2(session, spaceCapacityInput, out spaceCountOutput, spaces);
+
+            private delegate int xrCreateReferenceSpaceDelegate(ulong session, ref XrReferenceSpaceCreateInfo createInfo, out ulong space);
+            private xrCreateReferenceSpaceDelegate m_xrCreateReferenceSpace;
+            public int xrCreateReferenceSpace(ref XrReferenceSpaceCreateInfo createInfo, out ulong space) =>
+                m_xrCreateReferenceSpace(XrSession, ref createInfo, out space);
+            public int xrCreateReferenceSpace(ulong session, ref XrReferenceSpaceCreateInfo createInfo, out ulong space) =>
+                m_xrCreateReferenceSpace(session, ref createInfo, out space);
+
+            private delegate int xrDestroySpaceDelegate(ulong space);
+            private xrDestroySpaceDelegate m_xrDestroySpace;
+            public int xrDestroySpace(ulong space) =>
+                m_xrDestroySpace(space);
+            #endregion
+
+            private delegate int xrCreateHandTrackerEXTDelegate(ulong session, XrHandTrackerCreateInfoEXT createInfo, out ulong handTracker);
+            private xrCreateHandTrackerEXTDelegate m_xrCreateHandTrackerEXT;
+            public int xrCreateHandTrackerEXT(XrHandTrackerCreateInfoEXT createInfo, out ulong handle) =>
+                m_xrCreateHandTrackerEXT(XrSession, createInfo, out handle);
+            public int xrCreateHandTrackerEXT(ulong session, XrHandTrackerCreateInfoEXT createInfo, out ulong handle) =>
+                m_xrCreateHandTrackerEXT(session, createInfo, out handle);
+
+            private delegate int xrDestroyHandTrackerEXTDelegate(ulong handTracker);
+            private xrDestroyHandTrackerEXTDelegate m_xrDestroyHandTrackerEXT;
+            public int xrDestroyHandTrackerEXT(ulong handle) =>
+                m_xrDestroyHandTrackerEXT(handle);
+
+            private delegate int xrLocateHandJointsEXTDelegate(ulong handTracker,ref XrHandJointsLocateInfoEXT locateInfo, ref XrHandJointLocationsEXT locations);
+            private xrLocateHandJointsEXTDelegate m_xrLocateHandJointsEXT;
+            public int xrLocateHandJointsEXT(ulong handTracker,ref XrHandJointsLocateInfoEXT locateInfo, ref XrHandJointLocationsEXT locations) =>
+                m_xrLocateHandJointsEXT(handTracker,ref locateInfo, ref locations);
+
+            public unsafe bool SystemSupportsHandTracking(out XrResult result)
+            {
+                var handTrackingSystemProp = new XrSystemHandTrackingPropertiesEXT()
+                {
+                    type = XrStructureType.XR_TYPE_SYSTEM_HAND_TRACKING_PROPERTIES_EXT,
+                    next = IntPtr.Zero,
+                };
+
+                var systemProp = new XrSystemProperties()
+                {
+                    type = XrStructureType.XR_TYPE_SYSTEM_PROPERTIES,
+                    next = (IntPtr)(&handTrackingSystemProp),
+                };
+
+                result = (XrResult)xrGetSystemProperties(XrInstance, SystemId, ref systemProp);
+                return result == XrResult.XR_SUCCESS && handTrackingSystemProp.supportsHandTracking != 0u;
+            }
+
+            public bool TryGetSupportedReferenceSpaceTypeCount(out int count, out XrResult result)
+            {
+                result = (XrResult)m_xrEnumerateReferenceSpaces2(XrSession, 0, out count, IntPtr.Zero);
+                return result == XrResult.XR_SUCCESS;
+            }
+
+            public bool TryGetSupportedReferenceSpaceTypes(XrReferenceSpaceType[] spaces, out XrResult result)
+            {
+                if (spaces == null || spaces.Length == 0)
+                {
+                    result = default;
+                    return true;
+                }
+
+                result = (XrResult)m_xrEnumerateReferenceSpaces2(XrSession, spaces.Length, out _, ArrayPtr(spaces));
+                return result == XrResult.XR_SUCCESS;
+            }
+
+            public bool TryGetSupportedReferenceSpaceType(XrReferenceSpaceType preferType, out XrReferenceSpaceType supportedType, out XrResult result)
+            {
+                supportedType = default;
+                if (!TryGetSupportedReferenceSpaceTypeCount(out var count, out result)) { return false; }
+                if (count == 0) { return false; } // FIXME: error code?
+
+                var spaces = new XrReferenceSpaceType[count];
+                if (!TryGetSupportedReferenceSpaceTypes(spaces, out result)) { return false; }
+
+                for (int i = 0; i < count; ++i)
+                {
+                    supportedType = spaces[i];
+                    if (supportedType == preferType) { break; }
+                }
+
+                return true;
+            }
+
+            public bool TryCreateReferenceSpace(XrReferenceSpaceType refSpaceType, XrVector3f position, XrQuaternionf orientation, out ulong handle, out XrResult result)
+            {
+                var createInfo = new XrReferenceSpaceCreateInfo()
+                {
+                    type = XrStructureType.XR_TYPE_REFERENCE_SPACE_CREATE_INFO,
+                    next = IntPtr.Zero,
+                    referencespacetype = refSpaceType,
+                    poseInReferenceSpace = new XrPosef()
+                    {
+                        position = position,
+                        orientation = orientation,
+                    },
+                };
+
+                result = (XrResult)xrCreateReferenceSpace(XrSession, ref createInfo, out handle);
+                return result == XrResult.XR_SUCCESS;
+            }
+
+            public bool TryDestroyReferenceSpace(ulong handle, out XrResult result)
+            {
+                result = (XrResult)xrDestroySpace(handle);
+                return result == XrResult.XR_SUCCESS;
+            }
+
+            public bool TryCreateHandTracker(XrHandEXT hand, out ulong handle, out XrResult result, XrHandJointSetEXT jointSet = XrHandJointSetEXT.XR_HAND_JOINT_SET_DEFAULT_EXT)
+            {
+                var createInfo = new XrHandTrackerCreateInfoEXT()
+                {
+                    type = XrStructureType.XR_TYPE_HAND_TRACKER_CREATE_INFO_EXT,
+                    next = IntPtr.Zero,
+                    hand = hand,
+                    handJointSet = XrHandJointSetEXT.XR_HAND_JOINT_SET_DEFAULT_EXT,
+                };
+
+                result = (XrResult)xrCreateHandTrackerEXT(XrSession, createInfo, out handle);
+                return result == XrResult.XR_SUCCESS;
+            }
+
+            public bool TryDestroyHandTracker(ulong handle, out XrResult result)
+            {
+                result = (XrResult)xrDestroyHandTrackerEXT(handle);
+                return result == XrResult.XR_SUCCESS;
+            }
+
+            public bool TryLocateHandJoints(ulong handle, ulong space, out bool isActive, XrHandJointLocationEXT[] locationArray, out XrResult result)
+            {
+                return TryLocateHandJoints(handle, space, out isActive, locationArray, null, out result);
+            }
+
+            public bool TryLocateHandJoints(ulong handle, ulong space, out bool isActive, XrHandJointLocationEXT[] locationArray, XrHandJointVelocityEXT[] velocityArray, out XrResult result)
+            {
+                return TryLocateHandJoints(handle, space, IntPtr.Zero, out isActive, locationArray, velocityArray, out result);
+            }
+
+            public bool TryLocateHandJoints(ulong handle, ulong space, ref XrHandJointsMotionRangeEXT motionRange, out bool isActive, XrHandJointLocationEXT[] locationArray, out XrResult result)
+            {
+                return TryLocateHandJoints(handle, space, ref motionRange, out isActive, locationArray, null, out result);
+            }
+
+            public unsafe bool TryLocateHandJoints(ulong handle, ulong space, ref XrHandJointsMotionRangeEXT motionRange, out bool isActive, XrHandJointLocationEXT[] locationArray, XrHandJointVelocityEXT[] velocityArray, out XrResult result)
+            {
+                var motionRangeInfo = new XrHandJointsMotionRangeInfoEXT()
+                {
+                    type = XrStructureType.XR_TYPE_HAND_JOINTS_MOTION_RANGE_INFO_EXT,
+                    next = IntPtr.Zero,
+                    handJointsMotionRange = motionRange,
+                };
+                
+                bool res = TryLocateHandJoints(handle, space, (IntPtr)(&motionRangeInfo), out isActive, locationArray, velocityArray, out result);
+                motionRange = motionRangeInfo.handJointsMotionRange;
+                return res;
+            }
+
+            private unsafe bool TryLocateHandJoints(ulong handle, ulong space, IntPtr motionRangeInfo, out bool isActive, XrHandJointLocationEXT[] locationArray, XrHandJointVelocityEXT[] velocityArray, out XrResult result)
+            {
+                var locateInfo = new XrHandJointsLocateInfoEXT()
+                {
+                    type = XrStructureType.XR_TYPE_HAND_JOINTS_LOCATE_INFO_EXT,
+                    next = motionRangeInfo,
+                    baseSpace = space,
+                    time = m_frameState.predictedDisplayTime, //An arbitrary number greater than 0
+                };
+
+                var locVelocitiesPtr = IntPtr.Zero;
+                if (velocityArray != null)
+                {
+                    var locVelocities = new XrHandJointVelocitiesEXT()
+                    {
+                        type = XrStructureType.XR_TYPE_HAND_JOINT_VELOCITIES_EXT,
+                        next = IntPtr.Zero,
+                        jointCount = (uint)velocityArray.Length,
+                        jointVelocities = ArrayPtr(velocityArray)
+                    };
+
+                    locVelocitiesPtr = (IntPtr)(&locVelocities);
+                }
+
+                var locations = new XrHandJointLocationsEXT()
+                {
+                    type = XrStructureType.XR_TYPE_HAND_JOINT_LOCATIONS_EXT,
+                    next = locVelocitiesPtr,
+                    jointCount = locationArray == null ? 0 : locationArray.Length,
+                    jointLocations = ArrayPtr(locationArray),
+                };
+
+                result = (XrResult)xrLocateHandJointsEXT(handle,ref locateInfo, ref locations);
+                isActive = locations.isActive != 0u;
+                return result == XrResult.XR_SUCCESS;
+            }
+
+            private unsafe static IntPtr ArrayPtr(XrReferenceSpaceType[] array)
+            {
+                if (array == null) { return IntPtr.Zero; }
+                fixed (XrReferenceSpaceType* p = array) { return (IntPtr)p; }
+            }
+
+            private unsafe static IntPtr ArrayPtr(XrHandJointLocationEXT[] array)
+            {
+                if (array == null) { return IntPtr.Zero; }
+                fixed (XrHandJointLocationEXT* p = array) { return (IntPtr)p; }
+            }
+
+            private unsafe static IntPtr ArrayPtr(XrHandJointVelocityEXT[] array)
+            {
+                if (array == null) { return IntPtr.Zero; }
+                fixed (XrHandJointVelocityEXT* p = array) { return (IntPtr)p; }
+            }
+
+        }
+    }
+}
--- a/com.htc.upm.vive.openxr/OpenXRHandTracking/Script/HandTracking_OpenXR_API.cs.meta
+++ b/com.htc.upm.vive.openxr/OpenXRHandTracking/Script/HandTracking_OpenXR_API.cs.meta
@@ -0,0 +1,11 @@
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+guid: 38169f0e301608a469f311ebb2233162
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
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