Behavior Tree addon

addons/beehave/nodes/beehave_root.gd

@@ -0,0 +1,84 @@
+extends BeehaveTree
+
+class_name BeehaveRoot, "../icons/tree.svg"
+
+const Blackboard = preload("../blackboard.gd")
+const SUCCESS = 0
+const FAILURE = 1
+const RUNNING = 2
+
+enum ProcessMode {
+	PHYSICS_PROCESS,
+	IDLE,
+	MANUAL
+}
+
+export (ProcessMode) var process_mode = ProcessMode.PHYSICS_PROCESS setget set_process_mode
+export (bool) var enabled = true
+
+export (NodePath) var actor_node_path
+
+var actor : Node
+
+onready var blackboard = Blackboard.new()
+
+func _ready():
+	if self.get_child_count() != 1:
+		push_error("Beehave error: Root %s should have one child (NodePath: %s)" % [self.name, self.get_path()])
+		disable()
+		return
+
+	actor = get_parent()
+	if actor_node_path:
+		actor = get_node(actor_node_path)
+
+	set_process_mode(self.process_mode)
+
+func _process(delta):
+	tick(delta)
+  
+func _physics_process(delta):
+	tick(delta)
+
+func tick(delta):
+	blackboard.set("delta", delta)
+
+	var status = self.get_child(0).tick(actor, blackboard)
+	
+	if status != RUNNING:
+		blackboard.set("running_action", null)
+
+func get_running_action():
+	if blackboard.has("running_action"):
+		return blackboard.get("running_action")
+	return null
+
+func get_last_condition():
+	if blackboard.has("last_condition"):
+		return blackboard.get("last_condition")
+	return null
+
+func get_last_condition_status():
+	if blackboard.has("last_condition_status"):
+		var status = blackboard.get("last_condition_status")
+		if status == SUCCESS:
+			return "SUCCESS"
+		elif status == FAILURE:
+			return "FAILURE"
+		else:
+			return "RUNNING"
+	return ""
+
+func enable():
+	self.enabled = true
+	set_process_mode(self.process_mode)
+
+func disable():
+	self.enabled = false
+	set_process(self.enabled)
+	set_physics_process(self.enabled)
+
+func set_process_mode(value):
+	process_mode = value
+	set_process(process_mode == ProcessMode.IDLE)
+	set_physics_process(process_mode == ProcessMode.PHYSICS_PROCESS)