feat(武器): 为乾坤剑添加弹反机制和伤害比例

增加子弹弹反概率和伤害比例属性
修改武器描述以反映新机制
更新子弹碰撞逻辑实现弹反或格挡

scripts/Contents/Bullets/Parrier.gd

@@ -7,6 +7,7 @@ var parryiedTimes: int = 0
 var maxParryTimes: int = 1
 var maxBallCount: int = 3
 var atk: float = 0
+var reflectRate: float = 0.25
 
 func spawn():
 	var varians = randi_range(0, 2)
@@ -30,10 +31,15 @@ func hitBullet(bullet: BulletBase): # 当前子弹与其他子弹相撞
 			eff.shot()
 			CameraManager.shake(250, 300)
 			launcher.impluse((position - bullet.position).normalized() * (bullet.speed * bullet.getDamage()) ** (1.0 / 3) * 250)
-			# 弹反
-			bullet.look_at(bullet.launcher.position)
-			bullet.launcher = launcher
-			bullet.baseDamage *= atk
+			# 弹反 还是 格挡？
+			if MathTool.rate(reflectRate):
+				bullet.look_at(bullet.launcher.position)
+				bullet.launcher = launcher
+				bullet.baseDamage *= atk
+				bullet.baseDamage *= reflectRate
+				bullet.lifeTime *= 2
+			else:
+				bullet.tryDestroy()
 			var cycler = launcher.getOrCreateCycleTimer("parry", 2000, 100)
 			if len(cycler.bullets) < maxBallCount: # 玩家最多只能拥有多少气
 				for b in BulletBase.generate(