45 lines
957 B
GDScript3
45 lines
957 B
GDScript3
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extends Node
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class_name StateMachine
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@export var initial_state: State
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signal state_changed(new_state: State)
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var current_state: State
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var states: Dictionary[String, State] = {}
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func _ready() -> void:
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for child in get_children():
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if child is State:
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states[child.name.to_lower()] = child
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child.transitioned.connect(_handle_child_transition)
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if initial_state:
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initial_state._enter()
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current_state = initial_state
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func _process(delta) -> void:
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if current_state:
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current_state._update(delta)
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func _physics_process(delta: float) -> void:
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if current_state:
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current_state._physics_update(delta)
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func _handle_child_transition(state: State, new_state_name: String) -> void:
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if state != current_state:
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return
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var new_state: State = states.get(new_state_name.to_lower(), null)
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if not new_state:
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return
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if current_state:
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current_state._exit()
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new_state._enter()
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current_state = new_state
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state_changed.emit(new_state)
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