apply fallbacks when tracker unavailable, cleanup

ovr-utils/addons/openvr_overlay/overlay_init.gd

@@ -3,8 +3,12 @@ extends Node
 var ovr_interface: ARVRInterface
 var ovr_config := preload("res://addons/godot-openvr/OpenVRConfig.gdns").new()
 
-var left_id = 0
-var right_id = 0
+var trackers = {
+	"head": 0,
+	"left": -1,
+	"right": -1,
+	"world": 63,
+}
 
 func _init() -> void:
 	ovr_config = preload("res://addons/godot-openvr/OpenVRConfig.gdns").new()
@@ -14,24 +18,39 @@ func _init() -> void:
 	# Find the OpenVR interface and initialise it
 	ovr_interface = ARVRServer.find_interface("OpenVR")
 	if ovr_interface and ovr_interface.initialize():
-		pass
+		print("OpenVR Initialized.")
 
 
 func _ready() -> void:
-	ARVRServer.connect("tracker_added", self, "_tracker_changed")
-	ARVRServer.connect("tracker_removed", self, "_tracker_changed")
+	ARVRServer.connect("tracker_added", self, "_tracker_added")
+	ARVRServer.connect("tracker_removed", self, "_tracker_removed")
 	update_hand_ids()
 
-func _tracker_changed(tracker_name: String, type: int, id: int):
+
+func _tracker_added(tracker_name: String, type: int, id: int):
 	update_hand_ids()
 
+
+func _tracker_removed(tracker_name: String, type: int, id: int):
+	match id:
+		1:
+			trackers.left = -1
+		2:
+			trackers.right = -1
+
+
 func update_hand_ids():
+	trackers.left = -1
+	trackers.right = -1
 	for i in ARVRServer.get_tracker_count():
-		var tracker = ARVRServer.get_tracker(i)
-#		print(tracker.get_name(), ": hand ", tracker.get_hand())
+		var t = ARVRServer.get_tracker(i)
+		var tracking_id = get_id(t)
+		match t.get_hand():
+			1:
+				trackers.left = tracking_id
+			2:
+				trackers.right = tracking_id
 
-		var tracking_id = tracker.get_name().split("_")[-1]
-		if tracker.get_hand() == 1:
-			left_id = tracking_id
-		elif tracker.get_hand() == 2:
-			right_id = tracking_id
+
+static func get_id(tracker) -> int:
+	return int(tracker.get_name().split("_")[-1])

ovr-utils/addons/openvr_overlay/overlay_instance.gd

@@ -22,6 +22,7 @@ var offsets:Dictionary = {
 
 # what's actually tracking
 var current_target: String = "world" setget _set_current_target# most of the time the actual target, but will fall back
+var fallback = ["left", "right", "head"]
 
 var _tracker_id: int = 0
 
@@ -49,17 +50,19 @@ func _ready() -> void:
 
 func load_settings():
 	if Settings.s.overlays.has(name):
-		target = Settings.s.overlays[name].target
-		# TODO target fallback
-		update_current_target()
+		if Settings.s.overlays[name].has("fallback"):
+			fallback = Settings.s.overlays[name].fallback
+		set_target(Settings.s.overlays[name].target)
+
 		set_width_in_meters(Settings.s.overlays[name].width)
+
 		for t_key in Settings.s.overlays[name].offsets:
 			var t_offset = Settings.s.overlays[name].offsets[t_key]
 			offsets[t_key].pos = t_offset.pos
 			offsets[t_key].rot = t_offset.rot
 		update_offset()
 	else:
-		#TEMP defaults
+		#TEMP defaults (remove when dragging any overlay is possible)
 		offsets[current_target].pos = translation
 		offsets[current_target].rot = transform.basis.get_rotation_quat()
 		update_offset()
@@ -72,6 +75,7 @@ func load_settings():
 func save_settings():
 	Settings.s.overlays[name].target = target
 	Settings.s.overlays[name].width = width_meters
+	Settings.s.overlays[name].fallback = fallback
 
 	if not Settings.s.overlays[name].has("offsets"):
 		Settings.s.overlays[name]["offsets"] = {}
@@ -87,16 +91,17 @@ func save_settings():
 
 func update_tracker_id() -> void:
 	_tracker_id = -1
-	if current_target in ["left", "right"]: # target is a controller
-		var target_id = TARGETS.find(current_target)
-
-		for i in ARVRServer.get_tracker_count():
-			var tracker = ARVRServer.get_tracker(i)
-			if tracker.get_hand() == target_id:
-				_tracker_id = int(tracker.get_name().split("_")[-1])
+	match current_target:
+		"left":
+			_tracker_id = OverlayInit.trackers.left
+		"right":
+			_tracker_id = OverlayInit.trackers.right
+		_:
+			return
 
 	if _tracker_id == -1:
-			# could not find controller, overlay will revert to fallback
+		# could not find controller, fallback
+		print("Missing controller ", current_target, " ", target, " ", fallback, " - ", name)
 		_tracker_id = 63 # highest tracker id (unused, at origin)
 
 
@@ -114,22 +119,24 @@ func update_offset() -> void:
 
 
 func update_current_target():
+	if OverlayInit.trackers[target] != -1:
 		_set_current_target(target)
-	# TODO fallback if not found
+	else: # fallback if not found
+		for f in fallback:
+			if OverlayInit.trackers[f] != -1:
+				_set_current_target(f)
+				break
+	update_tracker_id()
+
 
 
 func _tracker_changed(tracker_name: String, type: int, id: int):
-	update_tracker_id()
+	update_current_target()
 	update_offset()
 
 
-func get_tracker_id() -> int:
-	return _tracker_id
-
-
 func set_target(new: String):
 	target = new
-	update_tracker_id()
 	call_deferred("update_offset")
 	update_current_target()
 

ovr-utils/overlays/battery.gd

@@ -14,16 +14,16 @@ func update_text():
 	var l = "??"
 	var r = "??"
 
-	if OverlayInit.left_id:
-		l = OverlayInit.ovr_config.get_device_battery_percentage(OverlayInit.left_id)
+	if OverlayInit.trackers.left != -1:
+		l = OverlayInit.ovr_config.get_device_battery_percentage(OverlayInit.trackers.left)
 		l = str(int(l * 100))
-		if OverlayInit.ovr_config.is_device_charging(OverlayInit.left_id):
+		if OverlayInit.ovr_config.is_device_charging(OverlayInit.trackers.left):
 			l += "+"
 
-	if OverlayInit.right_id:
-		r = OverlayInit.ovr_config.get_device_battery_percentage(OverlayInit.right_id)
+	if OverlayInit.trackers.right != -1:
+		r = OverlayInit.ovr_config.get_device_battery_percentage(OverlayInit.trackers.right)
 		r = str(int(r * 100))
-		if OverlayInit.ovr_config.is_device_charging(OverlayInit.right_id):
+		if OverlayInit.ovr_config.is_device_charging(OverlayInit.trackers.right):
 			r += "+"
 
 	text = "L: " + l + "% R: " + r + "%"