Add addons

Sprout/addons/beehave/nodes/composites/selector.gd

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+## Selector nodes will attempt to execute each of its children until one of
+## them return `SUCCESS`. If all children return `FAILURE`, this node will also
+## return `FAILURE`. This node will attempt to process all its children every
+## single tick, even if one of them is currently `RUNNING` already.
+@tool
+class_name SelectorComposite extends Composite
+@icon("../../icons/selector.svg")
+
+func tick(actor: Node, blackboard: Blackboard) -> int:
+	for c in get_children():
+		var response = c.tick(actor, blackboard)
+		
+		if c is ConditionLeaf:
+			blackboard.set_value("last_condition", c)
+			blackboard.set_value("last_condition_status", response)
+
+		if response != FAILURE:
+			if response == SUCCESS:
+				# Interrupt any child that was RUNNING before.
+				interrupt(actor, blackboard)
+			else: # RUNNING
+				running_child = c
+			return response
+
+	return FAILURE