feat: 1. 添加武器击退功能，player 使用weapon_behavior/melee_behavior(hitbox 会调用 setup 初始化) 的 hitbox 击中 enemy_slow，enemy_slow拿到hitbox的knockback_power，以及hitbox指向enemy的方向，然后朝着该方向，使用power击退：调用enemy.gd 的 apply_knockback，然后_process中会对position修改，同时开启定时器，定时器结束的时候，使用 reset_knockback 重置

resources/items/weapons/melee/punch/stats_punch_1.tres

@@ -4,9 +4,5 @@
 
 [resource]
 script = ExtResource("1_b0adc")
-damage = 4.0
+knockback = 1.5
-accurary = 1.0
-cooldown = 1.5
-max_range = 180.0
-knockback = 1.0
 metadata/_custom_type_script = "uid://d3d6rctbb48mk"

scenes/unit/enemy/enemy.gd

@@ -4,9 +4,12 @@ class_name Enemy
 @export var flock_push := 20.0
 
 @onready var vision_area: Area2D = $VisionArea
+@onready var knockback_timer: Timer = $KnockbackTimer
 
 var can_move := true
 
+var knockback_dir: Vector2
+var knockback_power: float
 
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
@@ -21,8 +24,7 @@ func _process(delta: float) -> void:
 	if not can_move_forwards_player():
 		return
 	
-	position += get_move_direction() * stats.speed * delta
+	position += (get_move_direction() + knockback_dir * knockback_power) * stats.speed * delta
-	
 	update_rotate()
 		
 	
@@ -53,5 +55,33 @@ func can_move_forwards_player() -> bool:
 	return is_instance_valid(Global.player) and\
 	global_position.distance_to(Global.player.position) > 60
 	
+func apply_knockback(knock_dir: Vector2, knock_power: float) -> void:
+	knockback_dir = knock_dir
+	knockback_power = knock_power
+	if knockback_timer.time_left > 0:
+		knockback_timer.stop()
+		reset_knockback()
+		
+	knockback_timer.start()
 	
+func reset_knockback() -> void:
+	knockback_dir = Vector2.ZERO
+	knockback_power = 0
+
+
+func _on_knockback_timer_timeout() -> void:
+	reset_knockback()
 	
+func _on_hurtbox_component_on_damaged(hitbox: HitboxComponent) -> void:
+	super._on_hurtbox_component_on_damaged(hitbox)
+	
+	if hitbox.knockback_power > 0:
+		var dir := hitbox.source.global_position.direction_to(global_position)
+		apply_knockback(dir, hitbox.knockback_power)
+		
+		
+		
+		
+		
+		
+		

scenes/unit/enemy/enemy_chaser_slow.tscn

@@ -63,3 +63,9 @@ offset_top = -95.0
 offset_bottom = -75.0
 back_color = Color(0.015686275, 0.05490196, 0.16862746, 1)
 fill_color = Color(0.37254903, 0.5372549, 0.75686276, 1)
+
+[node name="KnockbackTimer" type="Timer" parent="." index="9" unique_id=1031574323]
+wait_time = 0.4
+one_shot = true
+
+[connection signal="timeout" from="KnockbackTimer" to="." method="_on_knockback_timer_timeout"]

scenes/unit/unit.gd

@@ -27,6 +27,8 @@ func _on_hurtbox_component_on_damaged(hitbox: HitboxComponent) -> void:
 		Global.on_create_block_text.emit(self)
 		return
 		
+	
+		
 	set_flash_material()
 	health_component.take_damage(hitbox.damage)
 	Global.on_create_damage_text.emit(self, hitbox)

scenes/weapons/melee/melee_behavior.gd

@@ -0,0 +1,26 @@
+extends WeaponBehavior
+class_name MeleeBehavior
+
+@export var hitbox: HitboxComponent
+
+func execute_attack() -> void:
+	weapon.is_attacking = true
+	
+	var tween := create_tween()
+	
+	var recoil_pos := Vector2(weapon.atk_start_pos.x - weapon.data.stats.recoil, weapon.atk_start_pos.y)
+	tween.tween_property(weapon.sprite_2d, "position", recoil_pos, weapon.data.stats.recoil_duration)
+	
+	hitbox.enable()
+	hitbox.setup(get_damage(), critical, weapon.data.stats.knockback, weapon.get_parent())
+	
+	var attack_pos := Vector2(weapon.atk_start_pos.x + weapon.data.stats.max_range, weapon.atk_start_pos.y)
+	tween.tween_property(weapon.sprite_2d, "position", attack_pos, weapon.data.stats.attack_duration)
+	
+	tween.tween_property(weapon.sprite_2d, "position", weapon.atk_start_pos, weapon.data.stats.back_duration)
+	
+	tween.finished.connect(func():
+		hitbox.disable()
+		weapon.is_attacking = false
+		critical = false
+	)

scenes/weapons/melee/melee_behavior.gd.uid

@@ -0,0 +1 @@
+uid://bbqq80eq8fqwn

scenes/weapons/melee/weapon_behavior.gd

@@ -0,0 +1,27 @@
+extends Node2D
+class_name WeaponBehavior
+
+@export var weapon: Weapon
+
+var critical := false
+
+func execute_attack() -> void:
+	pass
+	
+func get_damage() -> float:
+	var damage := weapon.data.stats.damage + Global.player.stats.damage
+	var crit_chance := weapon.data.stats.crit_chance
+	if Global.get_chance_success(crit_chance):
+		crit_chance = true
+		damage = ceil(damage * weapon.data.stats.crit_damage)
+	
+	return damage
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass

scenes/weapons/melee/weapon_behavior.gd.uid

@@ -0,0 +1 @@
+uid://ww04x180xsa3

scenes/weapons/melee/weapon_punch.tscn

@@ -2,6 +2,7 @@
 
 [ext_resource type="PackedScene" uid="uid://dcc7rsdy4j8v6" path="res://scenes/weapons/weapon_base.tscn" id="1_soyvn"]
 [ext_resource type="PackedScene" uid="uid://c0fyx8gj5uexl" path="res://scenes/components/hitbox_component.tscn" id="2_gq287"]
+[ext_resource type="Script" uid="uid://bbqq80eq8fqwn" path="res://scenes/weapons/melee/melee_behavior.gd" id="3_sv013"]
 
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_gq287"]
 size = Vector2(52, 42)
@@ -22,3 +23,8 @@ monitorable = false
 z_index = 1
 shape = SubResource("RectangleShape2D_gq287")
 debug_color = Color(0.9556908, 0.042769283, 0.5218647, 0.41960785)
+
+[node name="WeaponBehavior" parent="." index="3" unique_id=1507497844 node_paths=PackedStringArray("hitbox", "weapon")]
+script = ExtResource("3_sv013")
+hitbox = NodePath("../Sprite2D/HitboxComponent")
+weapon = NodePath("..")

scenes/weapons/weapon.gd

@@ -5,6 +5,7 @@ class_name Weapon
 @onready var sprite_2d: Sprite2D = $Sprite2D
 @onready var collision: CollisionShape2D = %CollisionShape2D
 @onready var cooldown_timer: Timer = $CooldownTimer
+@onready var weapon_behavior: WeaponBehavior = $WeaponBehavior
 
 var data: ItemWeapon
 var is_attacking := false
@@ -25,6 +26,9 @@ func _process(delta: float) -> void:
 	
 	rotate_to_target()
 	
+	if can_use_weapon():
+		use_weapon()
+	
 
 func setup_weapon(_data: ItemWeapon) -> void:
 	self.data = _data
@@ -32,6 +36,10 @@ func setup_weapon(_data: ItemWeapon) -> void:
 	
 func use_weapon() -> void:
 	calculate_spread()
+	weapon_behavior.execute_attack()
+	cooldown_timer.wait_time = data.stats.cooldown
+	cooldown_timer.start()
+	
 	
 func rotate_to_target() -> void:
 	if is_attacking: