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class_name StateMachine
extends Node
# Emitted when transitioning to a new state.
signal transitioned(state_name)
# Path to the initial active state. We export it to be able to pick the initial state in the inspector.
export var initial_state := NodePath()
# The current active state. At the start of the game, we get the `initial_state`.
onready var state: State = get_node(initial_state)
func _ready() -> void:
yield(owner, "ready")
# The state machine assigns itself to the State objects' state_machine property.
for child in get_children():
child.state_machine = self
state.enter()
func _process(delta: float) -> void:
state.update(delta)
func _physics_process(delta: float) -> void:
state.physics_update(delta)
func transition_to(target_state_name: String, msg: Dictionary = {}) -> void:
if not has_node(target_state_name):
print("no state")
return
state.exit()
state = get_node(target_state_name)
state.enter(msg)
emit_signal("transitioned", state.name)
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