feat: Add weapon system and attack functionality to Rooster character

- Introduced a weapons node in EntityBase for weapon management.
- Updated Rooster to include cooldown for attacks and weapon anchoring.
- Implemented attack method in Rooster to generate bullets.
- Enhanced BulletBase with life distance and lifetime properties.
- Created Chick character with animations and integrated into the world.
- Updated PurpleCrystal bullet behavior to move forward based on rotation.
- Refactored EntityBase to use a fields dictionary for attributes.
- Added FieldStore for managing entity-related constants.
- Adjusted GameRule to include bullet speed multiplier.

scripts/Statemachine/BulletBase.gd

@@ -3,11 +3,26 @@ class_name BulletBase
 
 @export var speed: float = 1
 @export var damage: float = 10
+@export var lifeDistance: float = -1 # -1表示无限距离
+@export var lifeTime: float = -1 # -1表示无限时间
 
 var launcher: EntityBase = null
+var spawnInWhen: float = 0
+var spawnInWhere: Vector2 = Vector2.ZERO
 
 func _ready():
 	area_entered.connect(hit)
+	spawnInWhen = Time.get_ticks_msec()
+	spawnInWhere = position
+func _process(_delta: float) -> void:
+	if lifeTime > 0:
+		if Time.get_ticks_msec() - spawnInWhen >= lifeTime:
+			destroy()
+	if lifeDistance > 0:
+		if position.distance_to(spawnInWhere) >= lifeDistance:
+			destroy()
+func _physics_process(_delta: float) -> void:
+	ai()
 
 func hit(target: Node):
 	var entity: EntityBase = EntityTool.fromHurtbox(target)
@@ -16,6 +31,13 @@ func hit(target: Node):
 	if GameRule.allowFriendlyFire:
 		if entity.isPlayer() == launcher.isPlayer(): return
 	entity.takeDamage(self)
+func forward(direction: Vector2):
+	position += direction.normalized() * speed * GameRule.bulletSpeedMultiplier
+
+func ai():
+	pass
+func destroy():
+	queue_free()
 
 static func generate(
 		bullet: PackedScene,

scripts/Statemachine/EntityBase.gd

@@ -1,10 +1,16 @@
 extends CharacterBody2D
 class_name EntityBase # 这是个抽象类
 
-@export var maxHealth: float = 100
-@export var movementSpeed: float = 1
+@export var fields: Dictionary = {
+	FieldStore.Entity.MAX_HEALTH: 100,
+	FieldStore.Entity.DAMAGE_MULTIPILER: 1,
+	FieldStore.Entity.MOVEMENT_SPEED: 1,
+	FieldStore.Entity.ATTACK_SPEED: 1,
+	FieldStore.Entity.CRIT_RATE: 0.05, # 0.05 = 5%
+	FieldStore.Entity.CRIT_DAMAGE: 2 # 2 = 200%
+} # 存一下词条
 @export var isBoss: bool = false
-@export var weapons: Array[Node2D] = []
+@export var cooldownUnit: float = 100 # 100毫秒每次攻击
 
 @onready var animatree: AnimationTree = $"%animatree"
 @onready var texture: AnimatedSprite2D = $"%texture"
@@ -13,11 +19,12 @@ class_name EntityBase # 这是个抽象类
 var health: float = 0
 
 var lastDirection: int = 1
+var lastAttack: int = 0
 
 func _ready():
-	health = maxHealth
+	health = fields.get(FieldStore.Entity.MAX_HEALTH)
 func _process(_delta):
-	health = clamp(health, 0, maxHealth)
+	health = clamp(health, 0, fields.get(FieldStore.Entity.MAX_HEALTH))
 	animatree.set("parameters/blend_position", lerpf(animatree.get("parameters/blend_position"), lastDirection, 0.1))
 func _physics_process(_delta: float) -> void:
 	velocity = Vector2.ZERO
@@ -26,7 +33,7 @@ func _physics_process(_delta: float) -> void:
 
 # 通用方法
 func move(direction: Vector2):
-	velocity = direction.normalized() * movementSpeed * 150 * abs(animatree.get("parameters/blend_position"))
+	velocity = direction.normalized() * fields.get(FieldStore.Entity.MOVEMENT_SPEED) * 200 * abs(animatree.get("parameters/blend_position"))
 	var currentDirection = sign(direction.x)
 	if currentDirection != 0:
 		lastDirection = currentDirection
@@ -34,6 +41,22 @@ func takeDamage(bullet: BulletBase):
 	health -= bullet.damage
 	if health <= 0:
 		die()
+func isCooldowned():
+	return Time.get_ticks_msec() - lastAttack >= cooldownUnit
+func startCooldown():
+	var state = isCooldowned()
+	if state:
+		lastAttack = Time.get_ticks_msec()
+	return state
+func tryAttack(type: int):
+	if startCooldown():
+		attack(type)
+func findWeaponAnchor(weaponName: String):
+	var anchor = $"%weapons".get_node(weaponName)
+	if anchor is Node2D:
+		return (anchor.position + texture.position) * Vector2(animatree.get("parameters/blend_position"), 1) + position
+	else:
+		return Vector2.ZERO
 
 # 关于分组
 func isPlayer():
@@ -51,11 +74,14 @@ static func generate(
 	entity: PackedScene,
 	spawnPosition: Vector2,
 	spawnRotation: float,
+	isMob: bool = true,
 	addtoWorld: bool = true
 ):
-	var instance = entity.instance()
+	var instance: EntityBase = entity.instance()
 	instance.position = spawnPosition
 	instance.rotation = spawnRotation
+	if isMob:
+		instance.add_to_group("mobs")
 	if addtoWorld:
 		WorldTool.rootNode.add_child(instance)
 	return instance