feat:star wrath leave animation update

scenes/weapons/star_wrath/star_wrath.gd

@@ -1,12 +1,11 @@
 extends StarWrath
 
 @export var star_wrath_origin: PackedScene
+var operation_idx = 0
+var operations = [func(): self.fall_star_process(), func(): self.leave()]
 @onready var animation_player = $AnimationPlayer
 @onready var star_wrath = $StarWrath
 
-var operations = [func(): self.fall_star_process(), func(): self.leave()]
-var operation_idx = 0
-
 
 func next_operation():
 	if operation_idx >= operations.size():
@@ -28,6 +27,7 @@ func leave():
 	await self.get_tree().create_timer(0.3).timeout
 	var tween = create_tween()
 	tween.tween_property(star_wrath, "global_position", Vector2(-100.0, -100), 2)
+	tween.tween_callback($"..".general_hide.bind())
 	next_operation()
 
 

scenes/weapons/star_wrath/star_wrath.tscn

@@ -10,6 +10,7 @@
 shader = ExtResource("2_xksic")
 shader_parameter/color_end = Vector4(0.5, 0, 0.5, 0.1)
 shader_parameter/color_start = Vector4(0.5, 0, 0.5, 0.5)
+shader_parameter/alpha_bias = 0.0
 
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_qm46a"]
 size = Vector2(28.6936, 31.8029)

scenes/weapons/star_wrath/star_wrath_root.gd

@@ -1,6 +1,7 @@
 extends Node
 
 signal attack_finished
+var tween
 @onready var star_wrath = $StarWrath
 @onready var bg = $Bg
 
@@ -23,6 +24,20 @@ func show():
 	bg.show()
 
 
+func general_hide():
+	tween = create_tween().set_loops()
+	tween.tween_callback(self.general_hide_interal.bind()).set_delay(0.01)
+
+
+func general_hide_interal():
+	var tmp = bg.material.get_shader_parameter("alpha_bias")
+	if tmp >= 0.9:
+		tween.kill()
+		bg.hide()
+		star_wrath.hide()
+	bg.material.set_shader_parameter("alpha_bias", tmp + 0.01)
+
+
 func start():
 	show()
 	star_wrath.start()

shaders/virtual.gdshader

@@ -2,6 +2,7 @@ shader_type canvas_item;
 
 uniform vec4 color_end;
 uniform vec4 color_start;
+uniform float alpha_bias = 0;
 
 void vertex() {
 	// Called for every vertex the material is visible on.
@@ -15,6 +16,7 @@ void fragment() {
 	vec4 gradient_color = color_start + (color_end - color_start) * screen_coords.y * 3.6;
 	// 设置最终颜色
 	COLOR = gradient_color;
+	COLOR.a -= alpha_bias;
 }
 
 //void light() {