feat: 添加新武器彩虹旗和紫水晶簇，调整饲料属性和数值

refactor: 重构子弹生成逻辑，支持分裂和折射效果

fix: 修复掉落物拾取范围和碰撞检测问题

style: 优化UI显示，添加武器品质和类型标签

docs: 更新字段描述，调整部分饲料名称和分类

perf: 优化数学工具函数，添加随机数处理工具

test: 调整波次生成逻辑，添加新敌人类型

build: 添加新资源文件和相关导入配置

scripts/Tools/EntityTool.gd

@@ -7,4 +7,20 @@ static func fromHurtbox(node: Node) -> EntityBase:
 			var entity = texture.get_parent()
 			if entity is EntityBase:
 				return entity as EntityBase
-	return null
+	return null
+static func findClosetEntity(to: Vector2, fromTree: SceneTree, player: bool = false, mob: bool = false, excludes: Array[EntityBase] = []) -> EntityBase:
+	var result = null
+	var lastDistance = INF
+	var nodes = []
+	if player:
+		nodes += fromTree.get_nodes_in_group("players")
+	if mob:
+		nodes += fromTree.get_nodes_in_group("mobs")
+	for entity in nodes:
+		if entity is EntityBase and entity not in excludes:
+			if to.distance_to(entity.position) < lastDistance:
+				lastDistance = to.distance_to(entity.position)
+				result = entity
+	return result
+static func findClosetPlayer(to: Vector2, fromTree: SceneTree, excludes: Array[EntityBase] = []) -> EntityBase:
+	return findClosetEntity(to, fromTree, true, false, excludes)

scripts/Tools/FieldStore.gd

@@ -28,7 +28,9 @@ enum Entity {
 	LUCK_VALUE,
 	SAVE_ENERGY,
 	ENERGY_REGENERATION,
-	DROPPED_ITEM_COLLECT_RADIUS
+	DROPPED_ITEM_COLLECT_RADIUS,
+	BULLET_SPLIT,
+	BULLET_REFRACTION
 }
 static var entityMap = {
 	Entity.MAX_HEALTH: "生命上限",
@@ -44,7 +46,7 @@ static var entityMap = {
 	Entity.ENERGY_MULTIPILER: "储能倍率",
 	Entity.PENARATION_RESISTANCE: "穿透抗性",
 	Entity.PRICE_REDUCTION: "饲料降价",
-	Entity.EXTRA_BULLET_COUNT: "额外子弹",
+	Entity.EXTRA_BULLET_COUNT: "多重射击",
 	Entity.DROP_APPLE_RATE: "苹果掉落率",
 	Entity.FEED_COUNT_SHOW: "饲料列表",
 	Entity.FEED_COUNT_CAN_MADE: "可制作饲料",
@@ -53,6 +55,8 @@ static var entityMap = {
 	Entity.SAVE_ENERGY: "节能",
 	Entity.ENERGY_REGENERATION: "能量再生效率",
 	Entity.DROPPED_ITEM_COLLECT_RADIUS: "掉落物拾取距离",
+	Entity.BULLET_SPLIT: "分裂",
+	Entity.BULLET_REFRACTION: "折射",
 }
 static var entityMapType = {
 	Entity.MAX_HEALTH: DataType.VALUE,
@@ -77,6 +81,8 @@ static var entityMapType = {
 	Entity.SAVE_ENERGY: DataType.PERCENT,
 	Entity.ENERGY_REGENERATION: DataType.PERCENT,
 	Entity.DROPPED_ITEM_COLLECT_RADIUS: DataType.VALUE,
+	Entity.BULLET_SPLIT: DataType.VALUE,
+	Entity.BULLET_REFRACTION: DataType.VALUE,
 }
 static var entityMaxValueMap = {
 	Entity.CRIT_RATE: 0.8,
@@ -96,7 +102,7 @@ static var entityApplier = {
 		return true
 		,
 	Entity.EXTRA_BULLET_COUNT: func(entity, value):
-		entity.fields[Entity.OFFSET_SHOOT] += value * 5
+		entity.fields[Entity.OFFSET_SHOOT] += value * 3
 		return true
 		,
 }

scripts/Tools/MathTool.gd

@@ -1,6 +1,6 @@
 class_name MathTool
 
-static func rate(value: float):
+static func rate(value: float) -> bool:
 	return randf() < value
 static func randv2_range(offset: float):
 	return Vector2(
@@ -13,3 +13,5 @@ static func signBeforeStr(value: float):
 	return ("+" if value > 0 else "-" if value < 0 else "") + str(abs(value))
 static func percent(value: float):
 	return value / 100
+static func shrimpRate(value: float):
+	return floor(value) + int(rate(value - floor(value)))

scripts/Tools/QuickUI.gd

@@ -7,3 +7,12 @@ static func smallText(text: String, center: bool = true):
 	if center:
 		label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 	return label
+static func graySmallText(text: String, center: bool = true):
+	var label = Label.new()
+	label.text = text
+	label.label_settings = LabelSettings.new()
+	label.label_settings.font_size = 12
+	label.label_settings.font_color = Color(0.6, 0.6, 0.6, 1)
+	if center:
+		label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	return label