Updated OpenXR hand tracking demo based on Godot changes in PR 95153

xr/openxr_hand_tracking_demo/assets/gltf/LeftHandHumanoid.gltf.import

@@ -32,8 +32,5 @@ animation/remove_immutable_tracks=true
 animation/import_rest_as_RESET=false
 import_script/path=""
 _subresources={}
-fbx/importer=0
-fbx/allow_geometry_helper_nodes=false
-fbx/embedded_image_handling=1
 gltf/naming_version=1
 gltf/embedded_image_handling=1

xr/openxr_hand_tracking_demo/assets/gltf/RightHandHumanoid.gltf.import

@@ -32,8 +32,5 @@ animation/remove_immutable_tracks=true
 animation/import_rest_as_RESET=false
 import_script/path=""
 _subresources={}
-fbx/importer=0
-fbx/allow_geometry_helper_nodes=false
-fbx/embedded_image_handling=1
 gltf/naming_version=1
 gltf/embedded_image_handling=1

xr/openxr_hand_tracking_demo/hand_info.gd

@@ -2,6 +2,7 @@ extends Node3D
 
 @export_enum("Left", "Right") var hand : int = 0
 
+@export var fallback_mesh : Node3D
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta):
@@ -36,17 +37,23 @@ func _process(delta):
 	if hand_tracker:
 		text += "\nHand tracker found\n"
 
-		if hand_tracker.has_tracking_data:
-			if hand_tracker.hand_tracking_source == XRHandTracker.HAND_TRACKING_SOURCE_UNKNOWN:
-				text += "- Source: unknown\n"
-			elif hand_tracker.hand_tracking_source == XRHandTracker.HAND_TRACKING_SOURCE_UNOBSTRUCTED:
-				text += "- Source: optical hand tracking\n"
-			elif hand_tracker.hand_tracking_source == XRHandTracker.HAND_TRACKING_SOURCE_CONTROLLER:
-				text += "- Source: inferred from controller\n"
-			else:
-				text += "- Source: %d\n" % [ hand_tracker.hand_tracking_source ]
+		# Report data source specified
+		if hand_tracker.hand_tracking_source == XRHandTracker.HAND_TRACKING_SOURCE_UNKNOWN:
+			text += "- Source: unknown\n"
+		elif hand_tracker.hand_tracking_source == XRHandTracker.HAND_TRACKING_SOURCE_UNOBSTRUCTED:
+			text += "- Source: optical hand tracking\n"
+		elif hand_tracker.hand_tracking_source == XRHandTracker.HAND_TRACKING_SOURCE_CONTROLLER:
+			text += "- Source: inferred from controller\n"
+		elif hand_tracker.hand_tracking_source == XRHandTracker.HAND_TRACKING_SOURCE_NOT_TRACKED:
+			text += "- Source: no source\n"
 		else:
-			text += "- No tracking data\n"
+			text += "- Source: %d\n" % [ hand_tracker.hand_tracking_source ]
+
+		# If we're not tracking, show our fallback mesh on our controller tracking.
+		# If we're also not controller tracking, we can't show anything.
+		# Note: this is only a sphere in this example.
+		if fallback_mesh:
+			fallback_mesh.visible = not hand_tracker.has_tracking_data
 	else:
 		text += "\nNo hand tracker found!\n"
 

xr/openxr_hand_tracking_demo/main.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=14 format=3 uid="uid://br3bss6kac8pa"]
+[gd_scene load_steps=15 format=3 uid="uid://br3bss6kac8pa"]
 
 [ext_resource type="PackedScene" uid="uid://d22k0sp2hinew" path="res://assets/gltf/LeftHandHumanoid.gltf" id="2_3hxem"]
 [ext_resource type="Script" path="res://start_vr.gd" id="2_5rtkn"]
@@ -32,6 +32,10 @@ size = Vector2(1000, 1000)
 subdivide_width = 10
 subdivide_depth = 10
 
+[sub_resource type="SphereMesh" id="SphereMesh_d5x0p"]
+radius = 0.01
+height = 0.02
+
 [node name="Main" type="Node3D"]
 
 [node name="StartVR" type="Node3D" parent="."]
@@ -73,12 +77,14 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0.13752, 0.941084, 0)
 [node name="Box03" parent="Table" instance=ExtResource("7_6sqt7")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0.0746718, 1.06282, 0)
 
-[node name="LeftHandInfo" parent="Table" instance=ExtResource("5_wlhtu")]
+[node name="LeftHandInfo" parent="Table" node_paths=PackedStringArray("fallback_mesh") instance=ExtResource("5_wlhtu")]
 transform = Transform3D(0.939693, -0.085635, 0.331126, 0, 0.968147, 0.25038, -0.34202, -0.23528, 0.909761, -0.713026, 0.8718, -0.309953)
+fallback_mesh = NodePath("../../XROrigin3D/LeftHandController/FullbackMesh")
 
-[node name="RightHandInfo" parent="Table" instance=ExtResource("5_wlhtu")]
+[node name="RightHandInfo" parent="Table" node_paths=PackedStringArray("fallback_mesh") instance=ExtResource("5_wlhtu")]
 transform = Transform3D(0.939693, 0.085635, -0.331126, 0, 0.968147, 0.25038, 0.34202, -0.23528, 0.909761, 0.278022, 0.8718, -0.381943)
 hand = 1
+fallback_mesh = NodePath("../../XROrigin3D/RightHandController/FullbackMesh")
 
 [node name="XROrigin3D" type="XROrigin3D" parent="."]
 
@@ -91,6 +97,9 @@ tracker = &"left_hand"
 pose = &"pose"
 show_when_tracked = true
 
+[node name="FullbackMesh" type="MeshInstance3D" parent="XROrigin3D/LeftHandController"]
+mesh = SubResource("SphereMesh_d5x0p")
+
 [node name="PickupHandler" parent="XROrigin3D/LeftHandController" instance=ExtResource("3_sg1io")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0.05, 0, 0)
 pickup_action = "pickup"
@@ -101,6 +110,10 @@ tracker = &"right_hand"
 pose = &"pose"
 show_when_tracked = true
 
+[node name="FullbackMesh" type="MeshInstance3D" parent="XROrigin3D/RightHandController"]
+mesh = SubResource("SphereMesh_d5x0p")
+skeleton = NodePath("../../LeftHandController")
+
 [node name="PickupHandler" parent="XROrigin3D/RightHandController" instance=ExtResource("3_sg1io")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.05, 0, 0)
 pickup_action = "pickup"

xr/openxr_hand_tracking_demo/project.godot

@@ -35,5 +35,8 @@ openxr/enabled=true
 openxr/reference_space=2
 openxr/foveation_level=2
 openxr/foveation_dynamic=true
+openxr/extensions/hand_tracking=true
+openxr/extensions/hand_tracking_unobstructed_data_source=true
+openxr/extensions/hand_tracking_controller_data_source=true
 openxr/extensions/hand_interaction_profile=true
 shaders/enabled=true