63 lines
2.0 KiB
GDScript3
63 lines
2.0 KiB
GDScript3
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extends Control
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class_name card_arrow
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##用于贝塞尔曲线选择目标的线图片
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@export var texture_circle:Texture2D
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##用于贝塞尔曲线选择目标的箭头图片
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@export var texture_arrow:Texture2D
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##贝塞尔曲线选择目标的线密度
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@export var texture_num:int=5
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##贝塞尔箭头初始旋转因子(弧度制度)
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@export var arrowImageRotate:float=PI/2
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##箭头图片容器场景
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@export var arrowImageScene:PackedScene
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##是否开启
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@export var is_start:bool=false
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@export_group("缩放")
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##用来决定arrow节点缩放曲线的curve
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@export var curve:Curve
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##缩放最大系数
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@export var max_scale:float=2
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##图片节点队列
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var texture_array:Array[arrowImage]=[]
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func _ready():
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curve.bake()
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for i in range(texture_num):
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var new_texture=arrowImageScene.instantiate()
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self.add_child(new_texture)
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texture_array.append(new_texture)
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new_texture.set_image(texture_circle,2)
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new_texture.hide()
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texture_array[texture_num-1].set_image(texture_arrow,2)
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func replace_texture():
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var mouse_pos=(get_viewport().get_mouse_position()-self.global_position)
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texture_array[0].rotation=texture_array[1].rotation
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for i in range(1,texture_array.size()):
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var t=logWithBase(float(i)/(texture_array.size()-1)+1,2)
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var res=get_bezier_position(self.position,mouse_pos,t)
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texture_array[i].position=res[0]-self.position
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texture_array[i].rotation=res[1]-self.rotation+arrowImageRotate
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var scal=curve.sample(float(i+1)/texture_array.size())*max_scale
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texture_array[i].scale=Vector2(scal,scal)
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func _process(delta):
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if is_start:
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replace_texture()
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##贝塞尔曲线
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func get_bezier_position(p:Vector2,q:Vector2,scale:float):
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var p1=p+(q-p)*Vector2(-0.3,0.8)
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var p2=p+(q-p)*Vector2(0.1,1.4)
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return [(1-scale)**3*p+3*(1-scale)**2*scale*p1+3*(1-scale)*scale**2*p2+scale**3*q,
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((3*q-9*p2+9*p1-3*p)*scale**2+(6*p2-12*p1+6*p)*scale+3*p1-3*p).angle()]
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pass
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func logWithBase(value, base)->float:
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return log(value) / log(base)
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func start():
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for i in texture_array:
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i.show()
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is_start=true
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func stop():
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for i in texture_array:
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i.hide()
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is_start=false
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