feat: 添加掉落物功能，更新饲料和物品显示，重构相关UI组件

scripts/Statemachine/EntityBase.gd

@@ -20,6 +20,8 @@ var fields = {
 	ItemStore.ItemType.BASEBALL: 0,
 	ItemStore.ItemType.BASKETBALL: 0
 }
+@export var drops: Array[ItemStore.ItemType] = []
+@export var dropCounts: Array[Vector2] = []
 
 @onready var animatree: AnimationTree = $"%animatree"
 @onready var texture: AnimatedSprite2D = $"%texture"
@@ -38,7 +40,15 @@ var sprinting: bool = false
 func _ready():
 	health = fields.get(FieldStore.Entity.MAX_HEALTH)
 	statebar.visible = !isBoss
-	if !isPlayer():
+	if isPlayer():
+		UIState.player = self
+		hurtbox.body_entered.connect(
+			func(body):
+				if body is ItemDropped:
+					inventory[body.item] += body.stackCount
+					body.queue_free()
+		)
+	else:
 		currentFocusedBoss = get_tree().get_nodes_in_group("players")[0]
 func _process(_delta):
 	health = clamp(health, 0, fields.get(FieldStore.Entity.MAX_HEALTH))
@@ -78,7 +88,7 @@ func takeDamage(bullet: BulletBase, crit: bool):
 	if health <= 0:
 		if isBoss:
 			bullet.launcher.setBoss(null)
-		die()
+		tryDie()
 func isCooldowned():
 	return Time.get_ticks_msec() - lastAttack >= cooldownUnit / fields.get(FieldStore.Entity.ATTACK_SPEED)
 func startCooldown():
@@ -96,6 +106,13 @@ func trySprint():
 	playSound("sprint")
 	sprint()
 	sprinting = true
+func tryDie():
+	for drop in range(min(len(drops), len(dropCounts))):
+		var item = drops[drop]
+		var count = ceil(randf_range(dropCounts[drop].x, dropCounts[drop].y))
+		for i in range(count):
+			ItemDropped.generate(item, count, position + MathTool.randv2_range(GameRule.itemDroppedSpawnOffset))
+	die()
 func findWeaponAnchor(weaponName: String):
 	var anchor = $"%weapons".get_node(weaponName)
 	if anchor is Node2D:

scripts/Statemachine/FieldShow.gd

@@ -8,7 +8,7 @@ class_name FieldShow
 @onready var nameLabel: Label = $"%name"
 @onready var valueLabel: Label = $"%value"
 
-func _ready():
+func _physics_process(_delta):
 	nameLabel.text = FieldStore.entityMap[field]
 	var formattedValue: String
 	var dataType = FieldStore.entityMapType[field]

scripts/Statemachine/FullscreenPanelBase.gd

@@ -0,0 +1 @@
+extends Control

scripts/Statemachine/ItemDropped.gd

@@ -0,0 +1,39 @@
+extends RigidBody2D
+class_name ItemDropped
+
+var item: ItemStore.ItemType = ItemStore.ItemType.BASEBALL
+var stackCount: int = 1
+var targetPlayer: EntityBase = null
+
+@onready var texture: Sprite2D = $"%texture"
+
+func _process(_delta):
+	texture.texture = ItemStore.getTexture(item)
+func _physics_process(_delta):
+	if !is_instance_valid(targetPlayer):
+		targetPlayer = findPlayer()
+	if is_instance_valid(targetPlayer):
+		apply_central_force((targetPlayer.position - position).normalized() * 1000)
+func findPlayer() -> EntityBase:
+	var result = null
+	var lastDistance = INF
+	for player in get_tree().get_nodes_in_group("players"):
+		if player is EntityBase:
+			if position.distance_to(player.position) < lastDistance:
+				lastDistance = position.distance_to(player.position)
+				result = player
+	return result
+
+static func generate(
+		itemType: ItemStore.ItemType,
+		count: int,
+		spawnPosition: Vector2,
+		addToWorld: bool = true
+	):
+	var instance: ItemDropped = preload("res://components/UI/ItemDropped.tscn").instantiate()
+	instance.item = itemType
+	instance.stackCount = count
+	instance.position = spawnPosition
+	if addToWorld:
+		WorldManager.rootNode.call_deferred("add_child", instance)
+	return instance

scripts/Statemachine/ItemShow.gd

@@ -8,6 +8,6 @@ class_name ItemShow
 @onready var avatarTexture: TextureRect = $"%avatar"
 @onready var countLabel: Label = $"%count"
 
-func _ready():
-	avatarTexture.texture = load("res://resources/items/%s.svg" % ItemStore.idMap[type])
+func _physics_process(_delta: float):
+	avatarTexture.texture = ItemStore.getTexture(type)
 	countLabel.text = str(count)

scripts/Statemachine/UIState.gd

@@ -1,9 +1,17 @@
 extends CanvasLayer
 class_name UIState
 
+@onready var baseball = $"%baseball"
+@onready var basketball = $"%basketball"
+
+static var player: EntityBase = null
 static var bossbar: EntityStateBar
 
 func _ready():
 	bossbar = $"%bossbar"
 func _process(_delta):
 	bossbar.visible = !!bossbar.entity
+func _physics_process(_delta):
+	if is_instance_valid(player):
+		baseball.count = player.inventory[ItemStore.ItemType.BASEBALL]
+		basketball.count = player.inventory[ItemStore.ItemType.BASKETBALL]