Remove priority backref

behaviours/priority.gd

@@ -9,12 +9,9 @@ class_name Priority
 ## Emitted when the priority is changed.
 signal priority_changed(new: int, old: int)
 
-## Emitted when the priority is changed. No args are provided to work around a Godot bug.
-signal priority_changed_no_args
-
-
 @export var default_priority: int = 0
 @export var alternative_priority: int = 1
+@export var setup_signals_on_ready: bool = true
 
 var priority: int = 0:
 	get:
@@ -61,9 +58,9 @@ func get_ref() -> Node:
 func log_priority() -> void:
 	Log.p(self, "Priority: %d" % priority)
 
-
-func _on_priority_changed(_new: int, _old: int) -> void:
-	priority_changed_no_args.emit()
-
 func _ready() -> void:
 	priority = default_priority
+
+func link(parent: SamplerPriority) -> void:
+	if setup_signals_on_ready:
+		priority_changed.connect(func(_old, _new): parent.on_priority_changed(self))

behaviours/sampler.gd

@@ -9,6 +9,8 @@ class_name Sampler
 ## [Array] of [Node]s that can be [func sample]d by this [Sampler].
 @export var possibilities: Array[Node] = []
 
+var selected: Node = null;
+
 
 ## Get a reference.
 func sample() -> Node:
@@ -16,11 +18,19 @@ func sample() -> Node:
 	return null
 
 ## Set the [field enabled] property to true on a [method sample]d node, and to false on all others. 
-func enable() -> void:
-	var selected = sample()
-	for possibility in get_all_refs():
-		possibility.enabled = (selected == possibility)
+func sample_and_enable() -> void:
+	set_enabled(sample())
 
+func set_enabled(node: Node) -> void:
+	if node == selected:
+		return
+	selected = node
+	var selected_ref = get_ref(selected)
+	for possibility in get_all_refs():
+		possibility.enabled = (selected_ref == possibility)
+
+func get_ref(node: Node) -> Node:
+	return node
 
 ## Get all possible nodes referenced by [field possibilities].
 ##

behaviours/sampler_priority.gd

@@ -3,7 +3,11 @@ class_name SamplerPriority
 
 
 ## Always sample the object with the highest priority in the queue.
+var selected_priority = 0;
 
+func _ready():
+	for possibility in possibilities:
+		possibility.link(self)
 
 ## Get a reference.
 func sample() -> Priority:
@@ -19,10 +23,25 @@ func sample() -> Priority:
 	if highest_possibility == null:
 		return null
 	
-	return highest_possibility.get_ref()
+	selected_priority = highest_possibility.priority
+
+	return highest_possibility
+
+func on_priority_changed(node: Node):
+	if node == selected:
+		if node.priority > selected_priority:
+			selected_priority = node.priority
+		else:
+			sample_and_enable()
+	else:
+		if selected == null or node.priority > selected.priority:
+			set_enabled(node)
 
 func get_all_refs() -> Array[Node]:
 	var refs: Array[Node] = []
 	for possibility in possibilities:
 		refs.append(possibility.get_ref())
 	return refs
+
+func get_ref(node: Node) -> Node:
+	return node.get_ref()

entities/imp.tscn

@@ -124,11 +124,9 @@ stream = ExtResource("19_7la6c")
 [connection signal="ready" from="MovementSampler" to="MovementSampler" method="enable"]
 [connection signal="changed_direction" from="MovementWander" to="MovementWander/WanderPriority" method="priority_conditional"]
 [connection signal="move" from="MovementWander" to="." method="_on_move"]
-[connection signal="priority_changed_no_args" from="MovementWander/WanderPriority" to="MovementSampler" method="enable"]
 [connection signal="timeout" from="MovementWander/ChangeDirectionTimer" to="MovementWander" method="randomize_direction"]
 [connection signal="changed_target" from="MovementHunt" to="MovementHunt/HuntPriority" method="priority_conditional"]
 [connection signal="move" from="MovementHunt" to="." method="_on_move"]
-[connection signal="priority_changed_no_args" from="MovementHunt/HuntPriority" to="MovementSampler" method="enable"]
 [connection signal="tracked" from="MovementHunt/TrackerMeat" to="MovementHunt/TrackerMeat/TargetPicker" method="sample_target_if_null" unbinds=1]
 [connection signal="untracked" from="MovementHunt/TrackerMeat" to="MovementHunt/TrackerMeat/TargetPicker" method="clear_if_target"]
 [connection signal="target_changed" from="MovementHunt/TrackerMeat/TargetPicker" to="MovementHunt" method="set_target" unbinds=1]
@@ -140,7 +138,6 @@ stream = ExtResource("19_7la6c")
 [connection signal="fallen" from="MovementDrag" to="MovementDrag/DragPriority" method="priority_default"]
 [connection signal="fallen" from="MovementDrag" to="MovementDrag/FallSound" method="play"]
 [connection signal="move" from="MovementDrag" to="." method="_on_move"]
-[connection signal="priority_changed_no_args" from="MovementDrag/DragPriority" to="MovementSampler" method="enable"]
 [connection signal="dragged" from="MovementDrag/Draggable" to="MovementDrag" method="drag"]
 [connection signal="dropped" from="MovementDrag/Draggable" to="MovementDrag" method="drop"]
 [connection signal="eaten" from="Eater" to="." method="_on_eater_eaten"]

entities/sheep.tscn

@@ -188,24 +188,20 @@ stream = ExtResource("17_8kst2")
 [connection signal="move" from="MovementIdle" to="." method="_on_move"]
 [connection signal="move_disabled" from="MovementIdle" to="MovementIdle/BoredTimer" method="stop"]
 [connection signal="move_enabled" from="MovementIdle" to="MovementIdle/BoredTimer" method="start"]
-[connection signal="priority_changed_no_args" from="MovementIdle/IdlePriority" to="MovementSampler" method="enable"]
 [connection signal="timeout" from="MovementIdle/BoredTimer" to="MovementWander" method="randomize_direction"]
 [connection signal="changed_direction" from="MovementWander" to="MovementWander/WanderPriority" method="priority_conditional"]
 [connection signal="move" from="MovementWander" to="." method="_on_move"]
 [connection signal="move_disabled" from="MovementWander" to="MovementWander/TiredTimer" method="stop"]
 [connection signal="move_enabled" from="MovementWander" to="MovementWander/TiredTimer" method="start"]
-[connection signal="priority_changed_no_args" from="MovementWander/WanderPriority" to="MovementSampler" method="enable"]
 [connection signal="timeout" from="MovementWander/TiredTimer" to="MovementWander" method="clear_direction"]
 [connection signal="changed_target" from="MovementRunFromMouse" to="MovementRunFromMouse/RunFromMousePriority" method="priority_conditional"]
 [connection signal="move" from="MovementRunFromMouse" to="." method="_on_move"]
 [connection signal="move_enabled" from="MovementRunFromMouse" to="MovementWander" method="clear_direction"]
-[connection signal="priority_changed_no_args" from="MovementRunFromMouse/RunFromMousePriority" to="MovementSampler" method="enable"]
 [connection signal="cursor_entered" from="MovementRunFromMouse/CursorSense" to="MovementRunFromMouse" method="set_target"]
 [connection signal="cursor_exited" from="MovementRunFromMouse/CursorSense" to="MovementRunFromMouse" method="clear_target" unbinds=1]
 [connection signal="changed_target" from="MovementRunFromHunter" to="MovementRunFromHunter/RunFromHunterPriority" method="priority_conditional"]
 [connection signal="move" from="MovementRunFromHunter" to="." method="_on_move"]
 [connection signal="move_disabled" from="MovementRunFromHunter" to="MovementWander" method="clear_direction"]
-[connection signal="priority_changed_no_args" from="MovementRunFromHunter/RunFromHunterPriority" to="MovementSampler" method="enable"]
 [connection signal="tracked" from="MovementRunFromHunter/HunterSense" to="MovementRunFromHunter/HunterSense/TargetPicker" method="set_target_if_null"]
 [connection signal="untracked" from="MovementRunFromHunter/HunterSense" to="MovementRunFromHunter/HunterSense/TargetPicker" method="clear_if_target"]
 [connection signal="target_changed" from="MovementRunFromHunter/HunterSense/TargetPicker" to="MovementRunFromHunter" method="set_target" unbinds=1]
@@ -217,6 +213,5 @@ stream = ExtResource("17_8kst2")
 [connection signal="fallen" from="MovementDrag" to="MovementDrag/FallSound" method="play"]
 [connection signal="move" from="MovementDrag" to="." method="_on_move"]
 [connection signal="move_enabled" from="MovementDrag" to="MovementWander" method="clear_direction"]
-[connection signal="priority_changed_no_args" from="MovementDrag/DragPriority" to="MovementSampler" method="enable"]
 [connection signal="dragged" from="MovementDrag/Draggable" to="MovementDrag" method="drag"]
 [connection signal="dropped" from="MovementDrag/Draggable" to="MovementDrag" method="drop"]