Adding HTC tracker support

8 files changed, 387 insertions, 4 deletions

diff --git a/modules/openxr/SCsub b/modules/openxr/SCsub
index ff320236a7..8783e061d2 100644
--- a/modules/openxr/SCsub
+++ b/modules/openxr/SCsub
@@ -81,6 +81,8 @@ if env["platform"] == "android":
 if env["vulkan"]:
     env_openxr.add_source_files(module_obj, "extensions/openxr_vulkan_extension.cpp")
 
+env_openxr.add_source_files(module_obj, "extensions/openxr_htc_vive_tracker_extension.cpp")
+
 env.modules_sources += module_obj
 
 if env["tools"]:
diff --git a/modules/openxr/action_map/openxr_action_map.cpp b/modules/openxr/action_map/openxr_action_map.cpp
index 366e131369..0eb5302442 100644
--- a/modules/openxr/action_map/openxr_action_map.cpp
+++ b/modules/openxr/action_map/openxr_action_map.cpp
@@ -182,10 +182,40 @@ void OpenXRActionMap::create_default_action_sets() {
 	Ref<OpenXRAction> ax_touch = action_set->add_new_action("ax_touch", "A/X touching", OpenXRAction::OPENXR_ACTION_BOOL, "/user/hand/left,/user/hand/right");
 	Ref<OpenXRAction> by_button = action_set->add_new_action("by_button", "B/Y button", OpenXRAction::OPENXR_ACTION_BOOL, "/user/hand/left,/user/hand/right");
 	Ref<OpenXRAction> by_touch = action_set->add_new_action("by_touch", "B/Y touching", OpenXRAction::OPENXR_ACTION_BOOL, "/user/hand/left,/user/hand/right");
-	Ref<OpenXRAction> default_pose = action_set->add_new_action("default_pose", "Default pose", OpenXRAction::OPENXR_ACTION_POSE, "/user/hand/left,/user/hand/right");
+	Ref<OpenXRAction> default_pose = action_set->add_new_action("default_pose", "Default pose", OpenXRAction::OPENXR_ACTION_POSE,
+			"/user/hand/left,"
+			"/user/hand/right,"
+			// "/user/vive_tracker_htcx/role/handheld_object," <-- getting errors on this one
+			"/user/vive_tracker_htcx/role/left_foot,"
+			"/user/vive_tracker_htcx/role/right_foot,"
+			"/user/vive_tracker_htcx/role/left_shoulder,"
+			"/user/vive_tracker_htcx/role/right_shoulder,"
+			"/user/vive_tracker_htcx/role/left_elbow,"
+			"/user/vive_tracker_htcx/role/right_elbow,"
+			"/user/vive_tracker_htcx/role/left_knee,"
+			"/user/vive_tracker_htcx/role/right_knee,"
+			"/user/vive_tracker_htcx/role/waist,"
+			"/user/vive_tracker_htcx/role/chest,"
+			"/user/vive_tracker_htcx/role/camera,"
+			"/user/vive_tracker_htcx/role/keyboard");
 	Ref<OpenXRAction> aim_pose = action_set->add_new_action("aim_pose", "Aim pose", OpenXRAction::OPENXR_ACTION_POSE, "/user/hand/left,/user/hand/right");
 	Ref<OpenXRAction> grip_pose = action_set->add_new_action("grip_pose", "Grip pose", OpenXRAction::OPENXR_ACTION_POSE, "/user/hand/left,/user/hand/right");
-	Ref<OpenXRAction> haptic = action_set->add_new_action("haptic", "Haptic", OpenXRAction::OPENXR_ACTION_HAPTIC, "/user/hand/left,/user/hand/right");
+	Ref<OpenXRAction> haptic = action_set->add_new_action("haptic", "Haptic", OpenXRAction::OPENXR_ACTION_HAPTIC,
+			"/user/hand/left,"
+			"/user/hand/right,"
+			// "/user/vive_tracker_htcx/role/handheld_object," <-- getting errors on this one
+			"/user/vive_tracker_htcx/role/left_foot,"
+			"/user/vive_tracker_htcx/role/right_foot,"
+			"/user/vive_tracker_htcx/role/left_shoulder,"
+			"/user/vive_tracker_htcx/role/right_shoulder,"
+			"/user/vive_tracker_htcx/role/left_elbow,"
+			"/user/vive_tracker_htcx/role/right_elbow,"
+			"/user/vive_tracker_htcx/role/left_knee,"
+			"/user/vive_tracker_htcx/role/right_knee,"
+			"/user/vive_tracker_htcx/role/waist,"
+			"/user/vive_tracker_htcx/role/chest,"
+			"/user/vive_tracker_htcx/role/camera,"
+			"/user/vive_tracker_htcx/role/keyboard");
 
 	// Create our interaction profiles
 	Ref<OpenXRInteractionProfile> profile = OpenXRInteractionProfile::new_profile("/interaction_profiles/khr/simple_controller");
@@ -399,6 +429,37 @@ void OpenXRActionMap::create_default_action_sets() {
 	profile->add_new_binding(primary_click, "/user/hand/left/input/trackpad/click,/user/hand/right/input/trackpad/click");
 	profile->add_new_binding(primary_touch, "/user/hand/left/input/trackpad/touch,/user/hand/right/input/trackpad/touch");
 	profile->add_new_binding(haptic, "/user/hand/left/output/haptic,/user/hand/right/output/haptic");
+
+	// Create our HTC Vive tracker profile
+	profile = OpenXRInteractionProfile::new_profile("/interaction_profiles/htc/vive_tracker_htcx");
+	profile->add_new_binding(default_pose,
+			// "/user/vive_tracker_htcx/role/handheld_object/input/grip/pose," <-- getting errors on this one
+			"/user/vive_tracker_htcx/role/left_foot/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/right_foot/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/left_shoulder/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/right_shoulder/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/left_elbow/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/right_elbow/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/left_knee/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/right_knee/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/waist/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/chest/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/camera/input/grip/pose,"
+			"/user/vive_tracker_htcx/role/keyboard/input/grip/pose");
+	profile->add_new_binding(haptic,
+			// "/user/vive_tracker_htcx/role/handheld_object/output/haptic," <-- getting errors on this one
+			"/user/vive_tracker_htcx/role/left_foot/output/haptic,"
+			"/user/vive_tracker_htcx/role/right_foot/output/haptic,"
+			"/user/vive_tracker_htcx/role/left_shoulder/output/haptic,"
+			"/user/vive_tracker_htcx/role/right_shoulder/output/haptic,"
+			"/user/vive_tracker_htcx/role/left_elbow/output/haptic,"
+			"/user/vive_tracker_htcx/role/right_elbow/output/haptic,"
+			"/user/vive_tracker_htcx/role/left_knee/output/haptic,"
+			"/user/vive_tracker_htcx/role/right_knee/output/haptic,"
+			"/user/vive_tracker_htcx/role/waist/output/haptic,"
+			"/user/vive_tracker_htcx/role/chest/output/haptic,"
+			"/user/vive_tracker_htcx/role/camera/output/haptic,"
+			"/user/vive_tracker_htcx/role/keyboard/output/haptic");
 	add_interaction_profile(profile);
 }
 
diff --git a/modules/openxr/action_map/openxr_defs.cpp b/modules/openxr/action_map/openxr_defs.cpp
index e10326449c..89860199be 100644
--- a/modules/openxr/action_map/openxr_defs.cpp
+++ b/modules/openxr/action_map/openxr_defs.cpp
@@ -32,8 +32,28 @@
 
 // Our top level paths to which devices can be bound
 OpenXRDefs::TopLevelPath OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_TOP_LEVEL_PATH_MAX] = {
+	// Core OpenXR paths
 	{ "Left hand controller", "/user/hand/left" },
 	{ "Right hand controller", "/user/hand/right" },
+	{ "Head", "/user/head" },
+	{ "Gamepad", "/user/gamepad" },
+	{ "Treadmill", "/user/treadmill" },
+
+	// Specific to HTC tracker extension
+	// { "Handheld object tracker", "/user/vive_tracker_htcx/role/handheld_object" },
+	{ "Left foot tracker", "/user/vive_tracker_htcx/role/left_foot" },
+	{ "Right foot tracker", "/user/vive_tracker_htcx/role/right_foot" },
+	{ "Left shoulder tracker", "/user/vive_tracker_htcx/role/left_shoulder" },
+	{ "Right shoulder tracker", "/user/vive_tracker_htcx/role/right_shoulder" },
+	{ "Left elbow tracker", "/user/vive_tracker_htcx/role/left_elbow" },
+	{ "Right elbow tracker", "/user/vive_tracker_htcx/role/right_elbow" },
+	{ "Left knee tracker", "/user/vive_tracker_htcx/role/left_knee" },
+	{ "Right knee tracker", "/user/vive_tracker_htcx/role/right_knee" },
+	{ "Waist tracker", "/user/vive_tracker_htcx/role/waist" },
+	{ "Chest tracker", "/user/vive_tracker_htcx/role/chest" },
+	{ "Camera tracker", "/user/vive_tracker_htcx/role/camera" },
+	{ "Keyboard tracker", "/user/vive_tracker_htcx/role/keyboard" },
+
 };
 
 // Fallback Khronos simple controller
@@ -378,6 +398,137 @@ OpenXRDefs::IOPath OpenXRDefs::huawei_controller_paths[] = {
 	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_RIGHT_HAND], "/user/hand/right/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
 };
 
+// HTC Vive tracker
+// Interestingly enough trackers don't have buttons or inputs, yet these are defined in the spec.
+// I think this can be supported through attachments on the trackers.
+OpenXRDefs::IOPath OpenXRDefs::vive_tracker_controller_paths[] = {
+	// { "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Menu click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/input/menu/click", OpenXRAction::OPENXR_ACTION_BOOL },
+
+	// { "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+	{ "Trigger", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/input/trigger/value", OpenXRAction::OPENXR_ACTION_FLOAT },
+
+	// { "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trigger click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/input/trigger/click", OpenXRAction::OPENXR_ACTION_BOOL },
+
+	// { "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Squeeze click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/input/squeeze/click", OpenXRAction::OPENXR_ACTION_BOOL },
+
+	// { "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+	{ "Trackpad", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/input/trackpad", OpenXRAction::OPENXR_ACTION_VECTOR2 },
+
+	// { "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad click", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/input/trackpad/click", OpenXRAction::OPENXR_ACTION_BOOL },
+
+	// { "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+	{ "Trackpad touch", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/input/trackpad/touch", OpenXRAction::OPENXR_ACTION_BOOL },
+
+	// { "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+	{ "Grip pose", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/input/grip/pose", OpenXRAction::OPENXR_ACTION_POSE },
+
+	// { "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_HANDHELD_TRACKER], "/user/vive_tracker_htcx/role/handheld_object/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/left_foot/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_FOOT_TRACKER], "/user/vive_tracker_htcx/role/right_foot/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/left_shoulder/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_SHOULDER_TRACKER], "/user/vive_tracker_htcx/role/right_shoulder/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/left_elbow/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_ELBOW_TRACKER], "/user/vive_tracker_htcx/role/right_elbow/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_LEFT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/left_knee/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_RIGHT_KNEE_TRACKER], "/user/vive_tracker_htcx/role/right_knee/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_WAIST_TRACKER], "/user/vive_tracker_htcx/role/waist/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CHEST_TRACKER], "/user/vive_tracker_htcx/role/chest/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_CAMERA_TRACKER], "/user/vive_tracker_htcx/role/camera/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+	{ "Haptic output", &OpenXRDefs::available_top_level_paths[OpenXRDefs::OPENXR_HTC_KEYBOARD_TRACKER], "/user/vive_tracker_htcx/role/keyboard/output/haptic", OpenXRAction::OPENXR_ACTION_HAPTIC },
+};
+
 OpenXRDefs::InteractionProfile OpenXRDefs::available_interaction_profiles[] = {
 	{
 			"Simple controller", // display_name
@@ -439,6 +590,13 @@ OpenXRDefs::InteractionProfile OpenXRDefs::available_interaction_profiles[] = {
 			huawei_controller_paths, // io_paths
 			sizeof(huawei_controller_paths) / sizeof(OpenXRDefs::IOPath) // io_path_count
 	},
+
+	{
+			"HTC Vive tracker", // display_name
+			"/interaction_profiles/htc/vive_tracker_htcx", // openxr_path
+			vive_tracker_controller_paths, // io_paths
+			sizeof(vive_tracker_controller_paths) / sizeof(OpenXRDefs::IOPath) // io_path_count
+	},
 };
 
 int OpenXRDefs::available_interaction_profile_count = sizeof(OpenXRDefs::available_interaction_profiles) / sizeof(OpenXRDefs::InteractionProfile);
diff --git a/modules/openxr/action_map/openxr_defs.h b/modules/openxr/action_map/openxr_defs.h
index dbda4757f1..9bdd9a6ded 100644
--- a/modules/openxr/action_map/openxr_defs.h
+++ b/modules/openxr/action_map/openxr_defs.h
@@ -51,8 +51,28 @@
 class OpenXRDefs {
 public:
 	enum TOP_LEVEL_PATH {
+		// Core OpenXR toplevel paths
 		OPENXR_LEFT_HAND,
 		OPENXR_RIGHT_HAND,
+		OPENXR_HEAD,
+		OPENXR_GAMEPAD,
+		OPENXR_TREADMILL,
+
+		// HTC tracker extension toplevel paths
+		// OPENXR_HTC_HANDHELD_TRACKER,
+		OPENXR_HTC_LEFT_FOOT_TRACKER,
+		OPENXR_HTC_RIGHT_FOOT_TRACKER,
+		OPENXR_HTC_LEFT_SHOULDER_TRACKER,
+		OPENXR_HTC_RIGHT_SHOULDER_TRACKER,
+		OPENXR_HTC_LEFT_ELBOW_TRACKER,
+		OPENXR_HTC_RIGHT_ELBOW_TRACKER,
+		OPENXR_HTC_LEFT_KNEE_TRACKER,
+		OPENXR_HTC_RIGHT_KNEE_TRACKER,
+		OPENXR_HTC_WAIST_TRACKER,
+		OPENXR_HTC_CHEST_TRACKER,
+		OPENXR_HTC_CAMERA_TRACKER,
+		OPENXR_HTC_KEYBOARD_TRACKER,
+
 		OPENXR_TOP_LEVEL_PATH_MAX
 	};
 
@@ -89,6 +109,7 @@ private:
 	static IOPath vive_cosmos_paths[];
 	static IOPath vive_focus3_paths[];
 	static IOPath huawei_controller_paths[];
+	static IOPath vive_tracker_controller_paths[];
 	static InteractionProfile available_interaction_profiles[];
 	static int available_interaction_profile_count;
 
diff --git a/modules/openxr/extensions/openxr_htc_vive_tracker_extension.cpp b/modules/openxr/extensions/openxr_htc_vive_tracker_extension.cpp
new file mode 100644
index 0000000000..302acf4e30
--- /dev/null
+++ b/modules/openxr/extensions/openxr_htc_vive_tracker_extension.cpp
@@ -0,0 +1,67 @@
+/*************************************************************************/
+/*  openxr_htc_vive_tracker_extension.cpp                                */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "openxr_htc_vive_tracker_extension.h"
+#include "core/string/print_string.h"
+
+OpenXRHTCViveTrackerExtension *OpenXRHTCViveTrackerExtension::singleton = nullptr;
+
+OpenXRHTCViveTrackerExtension *OpenXRHTCViveTrackerExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRHTCViveTrackerExtension::OpenXRHTCViveTrackerExtension(OpenXRAPI *p_openxr_api) :
+		OpenXRExtensionWrapper(p_openxr_api) {
+	singleton = this;
+
+	request_extensions[XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME] = &available;
+}
+
+OpenXRHTCViveTrackerExtension::~OpenXRHTCViveTrackerExtension() {
+	singleton = nullptr;
+}
+
+bool OpenXRHTCViveTrackerExtension::is_available() {
+	return available;
+}
+
+bool OpenXRHTCViveTrackerExtension::on_event_polled(const XrEventDataBuffer &event) {
+	switch (event.type) {
+		case XR_TYPE_EVENT_DATA_VIVE_TRACKER_CONNECTED_HTCX: {
+			// Investigate if we need to do more here
+			print_verbose("OpenXR EVENT: VIVE tracker connected");
+
+			return true;
+		} break;
+		default: {
+			return false;
+		} break;
+	}
+}
diff --git a/modules/openxr/extensions/openxr_htc_vive_tracker_extension.h b/modules/openxr/extensions/openxr_htc_vive_tracker_extension.h
new file mode 100644
index 0000000000..7670bc074b
--- /dev/null
+++ b/modules/openxr/extensions/openxr_htc_vive_tracker_extension.h
@@ -0,0 +1,52 @@
+/*************************************************************************/
+/*  openxr_htc_vive_tracker_extension.h                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef OPENXR_HTC_VIVE_TRACKER_EXTENSION_H
+#define OPENXR_HTC_VIVE_TRACKER_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRHTCViveTrackerExtension : public OpenXRExtensionWrapper {
+public:
+	static OpenXRHTCViveTrackerExtension *get_singleton();
+
+	OpenXRHTCViveTrackerExtension(OpenXRAPI *p_openxr_api);
+	virtual ~OpenXRHTCViveTrackerExtension() override;
+
+	bool is_available();
+	virtual bool on_event_polled(const XrEventDataBuffer &event) override;
+
+private:
+	static OpenXRHTCViveTrackerExtension *singleton;
+
+	bool available = false;
+};
+
+#endif // !OPENXR_HTC_VIVE_TRACKER_EXTENSION_H
diff --git a/modules/openxr/openxr_api.cpp b/modules/openxr/openxr_api.cpp
index d8d3bacb19..5e35942012 100644
--- a/modules/openxr/openxr_api.cpp
+++ b/modules/openxr/openxr_api.cpp
@@ -48,7 +48,9 @@
 #include "extensions/openxr_vulkan_extension.h"
 #endif
 
-#include "openxr_interface.h"
+#include "extensions/openxr_htc_vive_tracker_extension.h"
+
+#include "modules/openxr/openxr_interface.h"
 
 OpenXRAPI *OpenXRAPI::singleton = nullptr;
 
@@ -1644,6 +1646,9 @@ OpenXRAPI::OpenXRAPI() {
 	// our android wrapper will initialize our android loader at this point
 	register_extension_wrapper(memnew(OpenXRAndroidExtension(this)));
 #endif
+
+	// register our other extensions
+	register_extension_wrapper(memnew(OpenXRHTCViveTrackerExtension(this)));
 }
 
 OpenXRAPI::~OpenXRAPI() {
diff --git a/modules/openxr/openxr_interface.cpp b/modules/openxr/openxr_interface.cpp
index ab06583932..9dfa005600 100644
--- a/modules/openxr/openxr_interface.cpp
+++ b/modules/openxr/openxr_interface.cpp
@@ -57,7 +57,24 @@ PackedStringArray OpenXRInterface::get_suggested_tracker_names() const {
 	PackedStringArray arr = {
 		"left_hand", // /user/hand/left is mapped to our defaults
 		"right_hand", // /user/hand/right is mapped to our defaults
-		"/user/treadmill"
+		"/user/treadmill",
+
+		// Even though these are only available if you have the tracker extension,
+		// we add these as we may be deploying on a different platform than our
+		// editor is running on.
+		"/user/vive_tracker_htcx/role/handheld_object",
+		"/user/vive_tracker_htcx/role/left_foot",
+		"/user/vive_tracker_htcx/role/right_foot",
+		"/user/vive_tracker_htcx/role/left_shoulder",
+		"/user/vive_tracker_htcx/role/right_shoulder",
+		"/user/vive_tracker_htcx/role/left_elbow",
+		"/user/vive_tracker_htcx/role/right_elbow",
+		"/user/vive_tracker_htcx/role/left_knee",
+		"/user/vive_tracker_htcx/role/right_knee",
+		"/user/vive_tracker_htcx/role/waist",
+		"/user/vive_tracker_htcx/role/chest",
+		"/user/vive_tracker_htcx/role/camera",
+		"/user/vive_tracker_htcx/role/keyboard"
 	};
 
 	return arr;