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engine/scripts/world/player/state/state.gd

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+#*****************************************************************************
+# @author  MakerYang
+# @site    mir2.makeryang.com
+#*****************************************************************************
+
+class_name StateMachine extends Node2D
+
+# 默认状态
+@export var current_action:StateAction
+
+func _ready() -> void:
+	# 设置节点中所有子节点的状态机
+	for child in get_children():
+		if child is StateAction:
+			child.state_machine = self
+	# 等待父节点就绪
+	await get_parent().ready
+	# 默认进入第一个状态
+	current_action = get_child(0)
+	current_action.enter()
+
+# 渲染帧更新
+func _process(_delta: float) -> void:
+	current_action.process_update(_delta)
+
+# 物理帧更新
+func _physics_process(_delta: float) -> void:
+	current_action.physics_process_update(_delta)
+
+# 切换状态
+func change_action(target_action_name: String) -> void:
+	# 获取目标状态节点
+	var target_action = get_node_or_null(target_action_name)
+	if target_action == null:
+		return
+	# 切换更新目标状态
+	# current_action.exit()
+	current_action = target_action
+	current_action.enter()