feat: 1. 武器自动根据最近的敌人旋转

2. 流程：player 初始化调用 add_weapon，更新weapon_container，weapon_punch在_process每一帧中监听，更新update_closest_target最近的敌人，然后rotate_to_target旋转到最近的敌人

scenes/weapons/melee/weapon_punch.tscn

@@ -15,6 +15,8 @@ position = Vector2(21, 1)
 scale = Vector2(2, 2)
 collision_layer = 16
 collision_mask = 8
+monitoring = false
+monitorable = false
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="Sprite2D/HitboxComponent" index="0" unique_id=1064980236]
 z_index = 1

scenes/weapons/weapon.gd

@@ -16,11 +16,83 @@ var weapon_spread: float
 func _ready() -> void:
 	atk_start_pos = sprite_2d.position
 	
+func _process(delta: float) -> void:
+	if not is_attacking:
+		if targets.size() > 0:
+			update_closest_target()
+		else:
+			closest_target = null
+	
+	rotate_to_target()
+	
 
 func setup_weapon(_data: ItemWeapon) -> void:
 	self.data = _data
 	collision.shape.radius = data.stats.max_range
 	
+func use_weapon() -> void:
+	calculate_spread()
+	
+func rotate_to_target() -> void:
+	if is_attacking:
+		rotation = get_custom_rotation_to_target()
+	else: 
+		rotation = get_rotation_target()
+
+
+func get_custom_rotation_to_target() -> float:
+	if not closest_target or not is_instance_valid(closest_target):
+		return rotation
+	
+	var rot := global_position.direction_to(closest_target.global_position).angle()
+	
+	return rot + weapon_spread
+	
+	
+func get_rotation_target() -> float:
+	if targets.size() == 0:
+		return get_idle_rotation()
+	
+	var rot := global_position.direction_to(closest_target.global_position).angle()
+	
+	return rot
+
+
+	
+func get_idle_rotation() -> float:
+	if Global.player.is_facing_right():
+		return 0
+	else:
+		return PI
+
+
+func calculate_spread() -> void:
+	weapon_spread += randf_range(-1 + data.stats.accurary, 1- data.stats.accurary)
+	rotation += weapon_spread
+	
+func update_closest_target() -> void:
+	closest_target = get_closest_target()
+	
+func get_closest_target() -> Node2D:
+	# 没有敌人在攻击范围
+	if targets.size() == 0:
+		return
+		
+	var closest_enemy := targets[0]
+	
+	var closest_distance := global_position.distance_to(closest_enemy.global_position)
+	
+	for i in range(1, targets.size()):
+		var target: Enemy = targets[i]
+		var distance := global_position.distance_to(target.global_position)
+		
+		if distance < closest_distance:
+			closest_enemy = target
+			closest_distance = distance
+	
+	return closest_enemy
+	
+	
 
 func can_use_weapon() -> bool:
 	return cooldown_timer.is_stopped() and closest_target