feat: 增加Chick角色的远程攻击逻辑，优化攻击方式选择

scripts/Contents/AIPresets/Entity.gd

@@ -8,3 +8,14 @@ static func follow(entity: EntityBase, target: EntityBase, minDistance: float =
 			entity.move(-delta)
 		else:
 			entity.move(delta)
+static func distanceAttack(entity: EntityBase, target: EntityBase, minDistance: float, maxDistance: float, index: int = 0):
+	var distance = (entity.position - target.position).length()
+	if minDistance <= distance and distance <= maxDistance:
+		entity.tryAttack(index)
+static func distanceAction(entity: EntityBase, target: EntityBase, minDistance: float, maxDistance: float, action: Callable):
+	var distance = (entity.position - target.position).length()
+	if minDistance <= distance and distance <= maxDistance:
+		action.call()
+static func weightAttack(entity: EntityBase, indexes: Array[int], weight: Array[int], chargeUp: Callable):
+	var method = MathTool.randc_from_weights(indexes, weight)
+	entity.tryAttack(method, chargeUp.call(method))

scripts/Contents/Characters/Chick.gd

@@ -18,13 +18,12 @@ func spawn():
 
 func ai():
 	PresetEntityAI.follow(self, currentFocusedBoss, 0)
-	if currentFocusedBoss.position.distance_to(position) < 200:
-		tryAttack(2)
-	elif currentFocusedBoss.position.distance_to(position) < 700:
-		tryAttack(1)
-	else:
-		var method = MathTool.randc_from([0, 0, 0, 0, 3])
-		tryAttack(method, method == 3)
+	PresetEntityAI.distanceAttack(self, currentFocusedBoss, 0, 200, 2)
+	PresetEntityAI.distanceAttack(self, currentFocusedBoss, 200, 700, 1)
+	PresetEntityAI.distanceAction(self, currentFocusedBoss, 700, INF,
+		func():
+			PresetEntityAI.weightAttack(self, [0, 3], [5, 1], func(index): return index == 3)
+	)
 func attack(type):
 	if type == 0:
 		var weaponPos = findWeaponAnchor("normal")

scripts/Tools/MathTool.gd

@@ -9,6 +9,12 @@ static func randv2_range(offset: float):
 	)
 static func randc_from(array: Array):
 	return array[randi() % array.size()]
+static func randc_from_weights(indexes: Array, weights: Array[int]):
+	var totals: Array = []
+	for i in indexes:
+		for j in range(weights[i]):
+			totals.append(i)
+	return randc_from(totals)
 static func signBeforeStr(value: float):
 	return ("+" if value > 0 else "-" if value < 0 else "") + str(abs(value))
 static func percent(value: float):