44 lines
1.0 KiB
GDScript
44 lines
1.0 KiB
GDScript
class_name StateMachine extends Node
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@export var starting_state : String = ""
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var states : Dictionary[String, StateNode] = {}
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var curr_state : StateNode = null
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var actor = null
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func _ready() -> void:
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for child in get_children():
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if child is StateNode:
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states[child.name] = child
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child.state_machine = self
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child.completed.connect(_on_state_completed)
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func start() -> void:
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if starting_state != "":
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var state : StateNode = states.get(starting_state)
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if state == null:
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printerr("Starting state not found! Expected %s" % [starting_state])
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else:
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enter_state(state)
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curr_state.execute(actor)
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func exit_state(state : StateNode) -> void:
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curr_state.exit()
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curr_state = null
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pass
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func enter_state(state : StateNode) -> void:
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curr_state = state
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curr_state.enter()
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pass
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func advance_state() -> void:
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pass
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func _on_state_completed(state : StateNode) -> void:
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if state == curr_state:
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advance_state()
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else:
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printerr("Wrong state completed! %s when expecting %s" % [state.name, curr_state])
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