refactor(追踪系统): 统一使用getTrackingAnchor方法获取追踪目标位置

修改多个子弹脚本和EntityBase，使用统一的getTrackingAnchor方法获取追踪目标位置
在BulletBase中增加目标有效性检查
调整Wave配置和Rooster武器顺序

scripts/Contents/Bullets/Diamond.gd

@@ -9,4 +9,4 @@ func ai():
 	canDamageSelf = !(timeLived() >= traceTime)
 	PresetAIs.forward(self, rotation)
 	if timeLived() < traceTime:
-		PresetAIs.trace(self, launcher.currentFocusedBoss.position, 0.05)
+		PresetAIs.trace(self, launcher.currentFocusedBoss.getTrackingAnchor(), 0.05)

scripts/Contents/Bullets/LGBTBullet.gd

@@ -11,7 +11,7 @@ func ai():
 	speed *= 1.05
 	speed = clamp(speed, 0, 20)
 	if is_instance_valid(tracer) and timeLived() < maxTraceTime:
-		PresetAIs.trace(self, tracer.position, clamp(speed / 50 * tracePower, 0, 1))
+		PresetAIs.trace(self, tracer.getTrackingAnchor(), clamp(speed / 50 * tracePower, 0, 1))
 	PresetAIs.forward(self, rotation)
 func destroy(_b):
 	EffectController.create(preload("res://components/Effects/LGBTBoom.tscn"), position).shot()

scripts/Contents/Bullets/VectorStar.gd

@@ -15,4 +15,4 @@ func ai():
 	else:
 		forwarded = true
 		if is_instance_valid(tracer):
-			rotation = position.angle_to_point(tracer.position)
+			rotation = position.angle_to_point(tracer.getTrackingAnchor())

scripts/Contents/Wave.gd

@@ -11,9 +11,9 @@ var per: int = 0
 static var current: int = 0
 static var data: Array[Wave] = [
 	# entity, minCount, maxCount, isBoss, from, to, per
-	create(preload("res://components/Characters/Hen.tscn"), 1, 5, false, 0, INF, 1),
-	create(preload("res://components/Characters/Chick.tscn"), 0, 0, true, 8, INF, 6),
-	# create(preload("res://components/Characters/Chick.tscn"), 1, 1, true, 0, INF, 1),
+	# create(preload("res://components/Characters/Hen.tscn"), 1, 5, false, 0, INF, 1),
+	# create(preload("res://components/Characters/Chick.tscn"), 0, 0, true, 8, INF, 6),
+	create(preload("res://components/Characters/Chick.tscn"), 1, 1, true, 0, INF, 1),
 ]
 
 static func create(

scripts/Statemachine/BulletBase.gd

@@ -59,15 +59,16 @@ func _physics_process(_delta: float) -> void:
 	if destroying: return
 	if is_instance_valid(launcher) and (launcher.isPlayer() or is_instance_valid(launcher.currentFocusedBoss)):
 		launcher.position -= Vector2.from_angle(rotation) * recoil
-		PresetAIs.trace(
-			self,
-			EntityTool.findClosetEntity(position, get_tree(),
-			!launcher.isPlayer(),
-			launcher.isPlayer(),
-			[launcher]
-			).position,
-			launcher.fields.get(FieldStore.Entity.BULLET_TRACE) / 10
-		)
+		var targetEntity = EntityTool.findClosetEntity(position, get_tree(),
+		!launcher.isPlayer(),
+		launcher.isPlayer(),
+		[launcher]		)
+		if is_instance_valid(targetEntity):
+			PresetAIs.trace(
+				self,
+				targetEntity.getTrackingAnchor(),
+				launcher.fields.get(FieldStore.Entity.BULLET_TRACE) / 10
+			)
 		ai()
 	else:
 		tryDestroy()
@@ -113,7 +114,8 @@ func tryRefract():
 		var value = launcher.fields.get(FieldStore.Entity.BULLET_REFRACTION)
 		var entity = EntityTool.findClosetEntity(position, get_tree(), !launcher.isPlayer(), launcher.isPlayer())
 		for i in range(MathTool.shrimpRate(value)):
-			refract(entity, i, value, value - floor(value))
+			if is_instance_valid(entity):
+				refract(entity, i, value, value - floor(value))
 
 # 抽象方法
 func ai():

scripts/Statemachine/EntityBase.gd

@@ -277,6 +277,9 @@ func playSound(type: String):
 		await cloned.finished
 		cloned.queue_free()
 
+func getTrackingAnchor() -> Vector2:
+	return hurtbox.global_position
+
 # 关于分组
 func isPlayer():
 	return is_in_group("players")