godot-plateformer/addons/reedcomponent/grap_hook/spawn_hook_component.gd

class_name SpawnHookComponet extends ComponentBase

##SpawnHookComponent必须绑定一个相关的RayCast2D，用来控制射线想要检测的位置。
@export var binded_hook_ray_cast_2d : RayCast2D
##可以通過在這裏添加一個ComponentOwner默認的字段名來讀取輸入方向，默認是為空的。
@export var binded_hook_move_input_property_name: StringName

##用於Grapping Hook的基本Instance
const GRAPPING_HOOK = preload("uid://ddwoxlqluxiq5")

var _ray_direction: Vector2
var _ray_reference: RayCast2D
var _ray_length: float = 100

##當前的Graphook的實例
var _current_grap_hook_inst: Hook

##钩爪伸长达到动画位置
signal hook_reach_finished(reach_limit: float, anchor: Node2D)

##生成一个Grap Hook
func spawn_grap_hook_inst(dir: Vector2) -> Hook:
	
	var i = GRAPPING_HOOK.instantiate() as Hook
	i.init(self,true)
	get_tree().current_scene.add_child(i)
	i.start_stretching(dir)
	_current_grap_hook_inst = i
	
	i.stretching_finished.connect(_on_hook_stretching_end)
	return _current_grap_hook_inst

##尝试关闭hook的延长
func suspend_hook_stretching(force_suspend: bool = false) -> bool:
	if not _current_grap_hook_inst: return false
	return _current_grap_hook_inst.end_stretching(force_suspend)

##当Hook stretching 关闭的时候，触发。
func _on_hook_stretching_end(reach_limit,anchor:Node2D) -> void:
	hook_reach_finished.emit(reach_limit,anchor)

##从当前的hook获取到hook的anchor
func get_current_hook_anchor() -> Node2D:
	return _current_grap_hook_inst._anchor

#func grap_reach_target(duration: float) -> bool:
	#if not _ray_reference or not _current_grap_hook_inst:return false
	#
	###重置所有Points的坐标点位置。
	#_current_grap_hook_inst.reset_line_points_to_target(component_owner.global_position)
	#
	#var start_pos: Vector2 = component_owner.global_position
	#var target_pos: Vector2 = _ray_reference.get_collision_point()
	#
	#var t := get_tree().create_tween()
	#t.set_trans(Tween.TRANS_SINE)
	#t.set_ease(Tween.EASE_OUT)
	#
	#t.tween_method(
		#_current_grap_hook_inst.update_line_anchor_pos,
		#start_pos,
		#target_pos,
		#duration
	#)
	#
	###结束时会发送广播
	#t.finished.connect(_on_hook_reach_finished)
	#
	#return true
#
###更新GrapHook的物理
#func update_grap_physics(input: Vector2,delta: float) -> void:
	#if input.is_zero_approx(): return
	#if not _current_grap_hook_inst: return
	#
	#var i = input.normalized()
	#_current_grap_hook_inst.move_hook(input,delta)
#
###此函數默認為Vector.Zeor,子類可以重寫以得到一個全新的結果，也可以通過綁定的方式獲得一個結果。
#func get_grap_move_input() -> Vector2:
	#
	##如果我們在組件裏綁定了Component上的一個字段，也可以直接獲取。
	#if binded_hook_move_input_property_name in component_owner:
		#return component_owner.get(binded_hook_move_input_property_name)
	#
	#return Vector2.ZERO
#
#func _on_hook_reach_finished() -> void:
	#_current_grap_hook_inst.m_update_rope_with_nodes = true
	#hook_reach_finished.emit()
#

func _init_component() -> void:
	pass