55 lines
1.5 KiB
GDScript
55 lines
1.5 KiB
GDScript
extends Node2D
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@export var binded_rock: Rock
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@export var binded_volumn: PlayerTriggerVolumn
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var _rock : Rock
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var _volumn : PlayerTriggerVolumn
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func _ready() -> void:
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_rock = binded_rock if binded_rock != null else _find_first_rock(self)
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_volumn = binded_volumn if binded_volumn != null else _find_first_volumn(self)
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if not _volumn or not _rock: return
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_volumn.player_entered.connect(_on_rock_start_shake,CONNECT_ONE_SHOT)
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func _on_rock_start_shake(player: Player) -> void:
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if not _rock: return
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_rock.start_shaking()
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$Timer.start()
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$Timer.timeout.connect(_on_rock_falling)
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func _on_rock_falling() -> void:
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_rock.stop_shaking()
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_rock.start_falling()
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## ================================
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## 查找工具函数（强类型）
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## ================================
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func _find_first_rock(root: Node) -> Rock:
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var found: Node = _find_first_child_matching(root, func(n: Node) -> bool: return n is Rock)
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return found as Rock
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func _find_first_volumn(root: Node) -> PlayerTriggerVolumn:
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var found: Node = _find_first_child_matching(root, func(n: Node) -> bool: return n is PlayerTriggerVolumn)
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return found as PlayerTriggerVolumn
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func _find_first_child_matching(root: Node, predicate: Callable) -> Node:
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for child: Node in root.get_children():
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# predicate.call() 返回值在类型系统里可能是 Variant，所以别用 := 推断
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var ok: bool = bool(predicate.call(child))
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if ok:
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return child
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var deeper: Node = _find_first_child_matching(child, predicate)
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if deeper != null:
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return deeper
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return null
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