Add hand mesh manager

Author: keveleigh

org.mixedrealitytoolkit.input/Visualizers/HandMeshVisualizer.cs

@@ -34,6 +34,11 @@ public bool ShowHandsOnTransparentDisplays
             set => showHandsOnTransparentDisplays = value;
         }
 
+        /// <summary>
+        /// Whether this visualizer currently has a loaded and visible hand mesh or not.
+        /// </summary>
+        public abstract bool IsRendering { get; }
+
         // Scratch list for checking for the presence of display subsystems.
         private readonly List<XRDisplaySubsystem> displaySubsystems = new List<XRDisplaySubsystem>();
 

org.mixedrealitytoolkit.input/Visualizers/HandMeshVisualizerManager.cs

@@ -0,0 +1,49 @@
+// Copyright (c) Mixed Reality Toolkit Contributors
+// Licensed under the BSD 3-Clause
+
+using UnityEngine;
+
+namespace MixedReality.Toolkit.Input
+{
+    /// <summary>
+    /// Manages the visibility of a set of hand mesh visualizers, all representing possible
+    /// visualization modes for a single hand (like platform-provided vs the built-in rigged hand mesh).
+    /// </summary>
+    public class HandMeshVisualizerManager : MonoBehaviour
+    {
+        [SerializeField, Tooltip("A priority-ordered visualizer list.")]
+        private HandMeshVisualizer[] visualizers;
+
+        protected void Update()
+        {
+            int renderingVisualizer = -1;
+
+            for (int i = 0; i < visualizers.Length; i++)
+            {
+                // If we've already found a rendering visualizer, we want to turn off the rest
+                if (renderingVisualizer > -1)
+                {
+                    visualizers[i].enabled = false;
+                }
+                else if (visualizers[i].IsRendering)
+                {
+                    renderingVisualizer = i;
+                }
+            }
+
+            // Ensure any visualizers that preceded the rendering one are turned off
+            for (int i = 0; i < renderingVisualizer; i++)
+            {
+                visualizers[i].enabled = false;
+            }
+
+            if (renderingVisualizer == -1)
+            {
+                for (int i = 0; i < visualizers.Length; i++)
+                {
+                    visualizers[i].enabled = true;
+                }
+            }
+        }
+    }
+}

org.mixedrealitytoolkit.input/Visualizers/HandMeshVisualizerManager.cs.meta

@@ -37,6 +37,9 @@ public class PlatformHandMeshVisualizer : HandMeshVisualizer
         // The XRController that is used to determine the pinch strength (i.e., select value!)
         private XRBaseController controller;
 
+        /// <inheritdoc/>
+        public override bool IsRendering => handRenderer != null && handRenderer.enabled && ShouldRenderHand();
+
         /// <inheritdoc/>
         protected override void OnEnable()
         {

org.mixedrealitytoolkit.input/Visualizers/PlatformHandVisualizer/PlatformHandMeshVisualizer.cs

@@ -5,6 +5,7 @@ PrefabInstance:
   m_ObjectHideFlags: 0
   serializedVersion: 2
   m_Modification:
+    serializedVersion: 3
     m_TransformParent: {fileID: 0}
     m_Modifications:
     - target: {fileID: -7366846053233975685, guid: da93d751ddc0f64468dfc02f18d02d00, type: 3}
@@ -99,6 +100,18 @@ PrefabInstance:
       propertyPath: controllerDetectedAction.m_Action.m_SingletonActionBindings.Array.data[0].m_Action
       value: Controller Detected
       objectReference: {fileID: 0}
+    - target: {fileID: 1493009138236857671, guid: da93d751ddc0f64468dfc02f18d02d00, type: 3}
+      propertyPath: m_LocalScale.x
+      value: -1
+      objectReference: {fileID: 0}
+    - target: {fileID: 1800205545854781715, guid: da93d751ddc0f64468dfc02f18d02d00, type: 3}
+      propertyPath: handNode
+      value: 4
+      objectReference: {fileID: 0}
+    - target: {fileID: 2263138549649042646, guid: da93d751ddc0f64468dfc02f18d02d00, type: 3}
+      propertyPath: handNode
+      value: 4
+      objectReference: {fileID: 0}
     - target: {fileID: 3507431783398283103, guid: da93d751ddc0f64468dfc02f18d02d00, type: 3}
       propertyPath: handNode
       value: 4
@@ -111,10 +124,6 @@ PrefabInstance:
       propertyPath: m_RootOrder
       value: 0
       objectReference: {fileID: 0}
-    - target: {fileID: 3973969148631863464, guid: da93d751ddc0f64468dfc02f18d02d00, type: 3}
-      propertyPath: m_LocalScale.x
-      value: -1
-      objectReference: {fileID: 0}
     - target: {fileID: 3973969148631863464, guid: da93d751ddc0f64468dfc02f18d02d00, type: 3}
       propertyPath: m_LocalPosition.x
       value: 0
@@ -160,4 +169,7 @@ PrefabInstance:
       value: openxr_left_hand
       objectReference: {fileID: 0}
     m_RemovedComponents: []
+    m_RemovedGameObjects: []
+    m_AddedGameObjects: []
+    m_AddedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: da93d751ddc0f64468dfc02f18d02d00, type: 3}