Fix broken gesture event actions raised by SimulatedGestureHand. (#4024)

The Awake function was never called (controllers are not MonoBehaviours).
There doesn't seem to be a good non-ctor init function, so use lazy init.

The currentPosition update was also redundant and broke the manipulation/
navigation events.

Added logging in the GestureTester example component for completeness.

Author: Lukas Tönne

Assets/MixedRealityToolkit.Examples/Demos/HandTracking/Script/GestureTester.cs

@@ -58,6 +58,8 @@ public void OnGestureUpdated(InputEventData eventData)
 
     public void OnGestureUpdated(InputEventData<Vector3> eventData)
     {
+        Debug.Log($"OnGestureUpdated [{Time.frameCount}]: {eventData.MixedRealityInputAction.Description}");
+
         var action = eventData.MixedRealityInputAction.Description;
         if (action == "Manipulate Action")
         {
@@ -83,6 +85,8 @@ public void OnGestureCompleted(InputEventData eventData)
 
     public void OnGestureCompleted(InputEventData<Vector3> eventData)
     {
+        Debug.Log($"OnGestureCompleted [{Time.frameCount}]: {eventData.MixedRealityInputAction.Description}");
+
         var action = eventData.MixedRealityInputAction.Description;
         if (action == "Manipulate Action")
         {

Assets/MixedRealityToolkit.Services/InputSimulation/SimulatedGestureHand.cs

@@ -13,6 +13,7 @@ public class SimulatedGestureHand : SimulatedHand
     {
         public override HandSimulationMode SimulationMode => HandSimulationMode.Gestures;
 
+        private bool initializedFromProfile = false;
         private MixedRealityInputAction holdAction = MixedRealityInputAction.None;
         private MixedRealityInputAction navigationAction = MixedRealityInputAction.None;
         private MixedRealityInputAction manipulationAction = MixedRealityInputAction.None;
@@ -25,7 +26,6 @@ public class SimulatedGestureHand : SimulatedHand
         private bool holdInProgress = false;
         private Vector3 currentRailsUsed = Vector3.one;
         private Vector3 currentPosition = Vector3.zero;
-        private Vector3 lastPosition = Vector3.zero;
         private Vector3 cumulativeDelta = Vector3.zero;
         private MixedRealityPose currentGripPose = MixedRealityPose.ZeroIdentity;
 
@@ -50,8 +50,16 @@ public SimulatedGestureHand(
         {
         }
 
-        void Awake()
-        { 
+        /// Lazy-init settings based on profile.
+        /// This cannot happen in the constructor because the profile may not exist yet.
+        private void EnsureProfileSettings()
+        {
+            if (initializedFromProfile)
+            {
+                return;
+            }
+            initializedFromProfile = true;
+
             var gestureProfile = MixedRealityToolkit.Instance.ActiveProfile.InputSystemProfile.GesturesProfile;
             if (gestureProfile != null)
             {
@@ -100,9 +108,13 @@ public override void SetupDefaultInteractions(Handedness controllerHandedness)
 
         protected override void UpdateInteractions(SimulatedHandData handData)
         {
-            lastPosition = currentPosition;
+            EnsureProfileSettings();
+
+            Vector3 lastPosition = currentPosition;
             currentPosition = jointPositions[(int)TrackedHandJoint.IndexTip];
+            cumulativeDelta += currentPosition - lastPosition;
             currentGripPose.Position = currentPosition;
+
             if (lastPosition != currentPosition)
             {
                 MixedRealityToolkit.InputSystem?.RaiseSourcePositionChanged(InputSource, this, currentPosition);
@@ -143,12 +155,6 @@ protected override void UpdateInteractions(SimulatedHandData handData)
                         }
                         else if (Interactions[i].BoolData)
                         {
-                            // For convenience of simulating in Unity Editor, make the ray use the index
-                            // finger position instead of knuckle, since the index finger doesn't move when we press.
-                            Vector3 newPosition = jointPositions[(int)TrackedHandJoint.IndexTip];
-                            cumulativeDelta += newPosition - currentPosition;
-                            currentPosition = newPosition;
-
                             if (!manipulationInProgress)
                             {
                                 if (cumulativeDelta.magnitude > manipulationStartThreshold)