更新EntityBase和Rooster类，添加动画支持并修复变量命名

scripts/Statemachine/EntityBase.gd

@@ -4,12 +4,19 @@ class_name EntityBase # 这是个抽象类
 @export var maxHealth: float = 100
 @export var movementSpeed: float = 100
 
+@onready var animatree = $"%animatree"
+@onready var texture = $"%texture"
+@onready var hurtbox = $"%hurtbox"
+
 var health: float = 0
 
+var lastDirection: int = 1
+
 func _ready():
 	health = maxHealth
 func _process(_delta):
 	health = clamp(health, 0, maxHealth)
+	animatree.set("parameters/blend_position", lerpf(animatree.get("parameters/blend_position"), lastDirection, 0.1))
 func _physics_process(_delta: float) -> void:
 	velocity = Vector2.ZERO
 	ai()
@@ -18,6 +25,9 @@ func _physics_process(_delta: float) -> void:
 # 通用方法
 func move(direction: Vector2):
 	velocity = direction.normalized() * movementSpeed
+	var currentDirection = sign(direction.x)
+	if currentDirection != 0:
+		lastDirection = currentDirection
 
 # 抽象方法
 func ai():