refactor: scope active world targets

world/activity/ActivitySite.gd

@@ -7,11 +7,13 @@ static var _all: Array = []
 @export var action_id: StringName = SimulationIds.ACTION_REST
 @export var display_name := "Activity Site"
 @export_range(1, 12, 1) var capacity := 1
+@export_range(0.1, 100.0, 0.1, "or_greater") var interaction_range := 3.0
 @export var debug_label_enabled := true
 
 @onready var interaction_point: Marker3D = $InteractionPoint
 
 var _last_label_text := ""
+var _active_world_adapter: ActiveWorldAdapter
 
 
 func _ready() -> void:
@@ -19,7 +21,12 @@ func _ready() -> void:
 		push_error("ActivitySite at %s has empty site_id" % get_path())
 		_update_presentation()
 		return
-	var existing: ActivitySite = get_by_id(site_id) as ActivitySite
+	if not is_interaction_range_valid():
+		push_error("ActivitySite '%s' must have a positive finite interaction_range" % site_id)
+		_update_presentation()
+		return
+	_active_world_adapter = ActiveWorldAdapter.find_for_node(self)
+	var existing: ActivitySite = get_by_id_in_context(site_id, _active_world_adapter)
 	if existing != null:
 		push_error(
 			(
@@ -31,11 +38,14 @@ func _ready() -> void:
 		return
 	_all.append(self)
 	add_to_group("activity_sites")
+	set_notify_transform(true)
+	_notify_world_adapter()
 	_update_presentation()
 	set_process(false)
 
 
 func _exit_tree() -> void:
+	_unregister_from_world_adapter()
 	_all.erase(self)
 
 
@@ -52,6 +62,41 @@ func supports_action(candidate_action_id: StringName) -> bool:
 	)
 
 
+func is_interaction_range_valid() -> bool:
+	return is_finite(interaction_range) and interaction_range > 0.0
+
+
+func _notification(what: int) -> void:
+	if what == NOTIFICATION_TRANSFORM_CHANGED and is_node_ready():
+		if is_instance_valid(_active_world_adapter):
+			_active_world_adapter.refresh_world_target_position(self)
+
+
+func _notify_world_adapter() -> void:
+	if not is_inside_tree():
+		return
+	if (
+		not is_instance_valid(_active_world_adapter)
+		or not _active_world_adapter.owns_target_node(self)
+	):
+		_active_world_adapter = ActiveWorldAdapter.find_for_node(self)
+	if _active_world_adapter != null:
+		_active_world_adapter.register_world_target(self)
+
+
+func _bind_active_world_adapter(adapter: ActiveWorldAdapter) -> void:
+	if adapter != null and adapter.owns_target_node(self):
+		_active_world_adapter = adapter
+
+
+func _unregister_from_world_adapter() -> void:
+	if not is_instance_valid(_active_world_adapter):
+		_active_world_adapter = ActiveWorldAdapter.find_for_node(self)
+	if is_instance_valid(_active_world_adapter):
+		_active_world_adapter.unregister_world_target(self)
+	_active_world_adapter = null
+
+
 func _update_presentation() -> void:
 	if not has_node("DebugLabel"):
 		return
@@ -78,5 +123,14 @@ static func get_by_id(search_id: StringName):
 	return null
 
 
+static func get_by_id_in_context(
+	search_id: StringName, adapter: ActiveWorldAdapter
+) -> ActivitySite:
+	for node in _all:
+		if node.site_id == search_id and ActiveWorldAdapter.find_for_node(node) == adapter:
+			return node as ActivitySite
+	return null
+
+
 static func get_all() -> Array:
 	return _all.duplicate()