一、背景

60 魔兽经典旧世是最经典的版本，遗憾的是 60 年代时还在大学读书，穷得很，买不起点卡，后来工作了，大概 70 年代开始玩的。

多年以前，玩游戏时，一直非常期望能够自己控制角色的属性级别，得到各种装备。

多年以后，在这款纯粹的开源服务器问世后，终于如愿以偿。

直到如今，都 2020 年，魔兽世界游戏的服务端源码项目在开源界依然非常活跃。

让我们重温经典吧。

二、demo

客户端下载wow-1.12.3版本，只需要修改一处配置文件 realmlist.wtf

SET realmlist wow.whyalive.org

指向上面的服务器地址即可。

测试帐号：
test1/123
wow/123

如果你懒得 DIY 自行编译安装，可以用上面给的 demo 账号和环境，下载客户端，修改配置文件，就可以登录游戏了。

三、服务器端

下面的编译安装过程比较多，但我已经尽可能完整的整理出来。基本上没有疏漏。

1、编译服务端有版本要求

2、升级 cmake

mkdir -p /usr/local/src/wow/cd /usr/local/src/wow/wget --no-check-certificate \https://cmake.org/files/v3.5/cmake-3.5.2.tar.gztar -zxvf cmake-3.5.2.tar.gzcd cmake-3.5.2./configure --prefix=/usr/local/cmake-3.5.2make -j16make install

3、升级 GCC

yum -y install glibc-devel.i686tar -jxvf gcc-4.8.2.tar.bz2cd gcc-4.8.2./contrib/download_prerequisitesmkdir buildcd build../configure --prefix=/usr/local/gcc-4.8.2make -j16make install

4、安装 boost

在 centos6.5 上用 yum 安装的 boost 版本太低，必须重新编译安装。

最好直接安装在默认路径。

wget http://netcologne.dl.sourceforge.net/project/boost/boost/1.60.0/boost_1_60_0.tar.bz2
tar -jxvf boost_1_60_0.tar.bz2
cd boost_1_60_0
./bootstrap.sh
./b2
./b2 install

5、编译安装

先拿到源码，
然后开始编译并安装 (必须要指定环境变量 LD_LIBRARY_PATH 为新版本 g++ 的库)：

cd /usr/local/src/wow/
git clone https://github.com/geektcp/elf-wow.gitexport LD_LIBRARY_PATH=/usr/local/gcc-4.9.3/lib64/
export BASE_DIR=/usr/local/wow_mangos_bot_2017.10.2
mkdir -p /usr/local/src/wow/ClassicWOW/build/  &&
rm -rf /usr/local/src/wow/ClassicWOW/build/*  &&
cd /usr/local/src/wow/ClassicWOW/build &&
/usr/local/cmake-3.5.2/bin/cmake ../ \
-DCMAKE_INSTALL_PREFIX=$BASE_DIR  \
-DCONF_DIR=$BASE_DIR/etc \
-DPCH=1 \
-DDEBUG=0 \
-DCMAKE_C_COMPILER=/usr/local/gcc-4.9.3/bin/gcc \
-DCMAKE_CXX_COMPILER=/usr/local/gcc-4.9.3/bin/g++ &&
time make -j16 &&
make install &&
chown -R wow.wow -R $BASE_DIR

6、地图文件生成

map 文件包括 maps,mmaps,vmaps,dbc 四个部分。，每个文件夹下面有大量地图文件。

这些地图文件是从哪里来的呢？

是从客户端的安装文件里面的抽取出来的。

抽取方式，先从服务器端的源码里面找到如下目录：

ls /usr/local/src/wow/mangos-classic/contrib/extractor_binary

ad.exe

ExtractResources.sh

MoveMapGen.exe

MoveMapGen.sh

offmesh.txt

README.txt

vmap_assembler.exe

vmapExtractor.exe

将上米娜的 exe 文件都拷贝 windows 环境的 wow 客户端下，跟 wow.exe 同一级目录

然后依次直接按如下步骤运行：

1、生成 dbc 和 maps 文件

ad.exe

2、创建 vmaps 空文件夹并生成文件

md vmaps

vmap_assembler.exe Buildings vmaps

3、创建 mmpas 文件夹并生成文件，这一步可能要很久，一两个小时。

md mmaps

MoveMapGen.exe

最后，如过不想一步一步完成，可以使用批处理 (写入到 generateMap.bat 文件中)：

ad.exe

md vmaps

vmap_assembler.exe Buildings vmaps

md mmaps

MoveMapGen.exe

7、数据库初始化

wow mangos classic 经典版本的数据库数据来源于：

/usr/local/src/wow/mangos-classic/sql

另一部分存在于源码目录下：

git clone git://github.com/cmangos/classic-db.git

创建数据库账号：

grant all on *.* to mangos@'%' IDENTIFIED by 'mangos';

创建 wow 数据库：

CREATE DATABASE `mangos` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
CREATE DATABASE `characters` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
CREATE DATABASE `realmd` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

导入对应的 sql 到对应的数据库：

git clone

ls cmangos/mangos-classic/tree/master/sql/base

characters.sql mangos.sql realmd.sql

8、配置文件

mangosd.conf 的关键配置项如下：

# 监听端口
WorldServerPort = 8085# 监听网卡IP
BindIP = "0.0.0.0"# 是否启用控制台
Console.Enable = 0# 日志级别
LogLevel = 1

另外还有数据库连接方式的参数：

LoginDatabaseInfo     = "10.10.10.10;3310;mangos;mangos;realmd"
WorldDatabaseInfo     = "10.10.10.10;3310;mangos;mangos;mangos"
CharacterDatabaseInfo = "10.10.10.10;3310;mangos;mangos;characters"

标准可用的配置文件如下：

cat /usr/local/wow_mangos/etc/mangosd.conf |grep -v ^# |grep -v ^$

[MangosdConf]ConfVersion=2015090801RealmID = 1DataDir = "/usr/local/wow_mangos/data/"LogsDir = "/usr/local/wow_mangos/logs/"LoginDatabaseInfo     = "10.10.10.10;3310;mangos;mangos;realmd"WorldDatabaseInfo     = "10.10.10.10;3310;mangos;mangos;mangos"CharacterDatabaseInfo = "10.10.10.10;3310;mangos;mangos;characters"LoginDatabaseConnections = 1WorldDatabaseConnections = 1CharacterDatabaseConnections = 1MaxPingTime = 30WorldServerPort = 8085BindIP = "0.0.0.0"SD2ErrorLogFile = "SD2Errors.log"UseProcessors = 0ProcessPriority = 1Compression = 1PlayerLimit = 100SaveRespawnTimeImmediately = 1MaxOverspeedPings = 2GridUnload = 1LoadAllGridsOnMaps = ""GridCleanUpDelay = 300000MapUpdateInterval = 100ChangeWeatherInterval = 600000PlayerSave.Interval = 900000PlayerSave.Stats.MinLevel = 0PlayerSave.Stats.SaveOnlyOnLogout = 1vmap.enableLOS = 1vmap.enableHeight = 1vmap.ignoreSpellIds = "7720"vmap.enableIndoorCheck = 1DetectPosCollision = 1TargetPosRecalculateRange = 1.5mmap.enabled = 1mmap.ignoreMapIds = ""UpdateUptimeInterval = 10MaxCoreStuckTime = 0AddonChannel = 1CleanCharacterDB = 1LogSQL = 1PidFile = ""LogLevel = 1LogTime = 0LogFile = "Server.log"LogTimestamp = 0LogFileLevel = 0LogFilter_TransportMoves = 1LogFilter_CreatureMoves = 1LogFilter_VisibilityChanges = 1LogFilter_Weather = 1LogFilter_DbStrictedCheck = 1LogFilter_Pathfinding = 1LogFilter_MapsLoading = 1LogFilter_EventAiDev = 1LogFilter_PeriodicAffects = 0LogFilter_PlayerMoves = 1LogFilter_SQLText = 1LogFilter_AIAndMovegens = 0LogFilter_PlayerStats = 0LogFilter_Damage = 0LogFilter_Combat = 0LogFilter_SpellCast = 0WorldLogFile = ""WorldLogTimestamp = 0DBErrorLogFile = "DBErrors.log"EventAIErrorLogFile = "EventAIErrors.log"CharLogFile = "Char.log"CharLogTimestamp = 0CharLogDump = 0GmLogFile = ""GmLogTimestamp = 0GmLogPerAccount = 0RaLogFile = ""LogColors = ""GameType = 1RealmZone = 1DBC.Locale = 255DeclinedNames = 0StrictPlayerNames = 0StrictCharterNames = 0StrictPetNames = 0MinPlayerName = 2MinCharterName = 2MinPetName = 2CharactersCreatingDisabled = 0CharactersPerAccount = 50CharactersPerRealm = 10SkipCinematics = 0MaxPlayerLevel = 60StartPlayerLevel = 1StartPlayerMoney = 0MaxHonorPoints = 75000StartHonorPoints = 0MinHonorKills = 15MaintenanceDay = 3InstantLogout = 1AllFlightPaths = 0AlwaysMaxSkillForLevel = 0ActivateWeather = 1CastUnstuck = 1MaxSpellCastsInChain = 20RabbitDay = 0Instance.IgnoreLevel = 0Instance.IgnoreRaid = 0Instance.ResetTimeHour = 4Instance.UnloadDelay = 1800000Quests.LowLevelHideDiff = 4Quests.HighLevelHideDiff = 7Quests.IgnoreRaid = 0Guild.EventLogRecordsCount = 100TimerBar.Fatigue.GMLevel = 4TimerBar.Fatigue.Max = 60TimerBar.Breath.GMLevel = 4TimerBar.Breath.Max = 60TimerBar.Fire.GMLevel = 4TimerBar.Fire.Max = 1MaxPrimaryTradeSkill = 2TradeSkill.GMIgnore.MaxPrimarySkillsCount = 4TradeSkill.GMIgnore.Level = 4TradeSkill.GMIgnore.Skill = 4MinPetitionSigns = 9MaxGroupXPDistance = 74MailDeliveryDelay = 3600MassMailer.SendPerTick = 10PetUnsummonAtMount = 0Event.Announce = 0BeepAtStart = 1ShowProgressBars = 0WaitAtStartupError = 0Motd = "Welcome to the Continued Massive Network Game Object Server."PlayerCommands = 1AllowTwoSide.Accounts = 0AllowTwoSide.Interaction.Chat = 0AllowTwoSide.Interaction.Channel = 0AllowTwoSide.Interaction.Group = 0AllowTwoSide.Interaction.Guild = 0AllowTwoSide.Interaction.Trade = 0AllowTwoSide.Interaction.Auction = 0AllowTwoSide.Interaction.Mail = 0AllowTwoSide.WhoList = 0AllowTwoSide.AddFriend = 0TalentsInspecting = 1ThreatRadius = 100Rate.Creature.Aggro = 1CreatureRespawnAggroDelay = 5000CreatureFamilyFleeAssistanceRadius = 30CreatureFamilyAssistanceRadius = 10CreatureFamilyAssistanceDelay = 1500CreatureFamilyFleeDelay = 7000WorldBossLevelDiff = 3Corpse.EmptyLootShow = 1Corpse.Decay.NORMAL = 300Corpse.Decay.RARE = 900Corpse.Decay.ELITE = 600Corpse.Decay.RAREELITE = 1200Corpse.Decay.WORLDBOSS = 3600Rate.Corpse.Decay.Looted = 0.0Rate.Creature.Normal.Damage = 1Rate.Creature.Elite.Elite.Damage = 1Rate.Creature.Elite.RAREELITE.Damage = 1Rate.Creature.Elite.WORLDBOSS.Damage = 1Rate.Creature.Elite.RARE.Damage = 1Rate.Creature.Normal.SpellDamage = 1Rate.Creature.Elite.Elite.SpellDamage = 1Rate.Creature.Elite.RAREELITE.SpellDamage = 1Rate.Creature.Elite.WORLDBOSS.SpellDamage = 1Rate.Creature.Elite.RARE.SpellDamage = 1Rate.Creature.Normal.HP = 1Rate.Creature.Elite.Elite.HP = 1Rate.Creature.Elite.RAREELITE.HP = 1Rate.Creature.Elite.WORLDBOSS.HP = 1Rate.Creature.Elite.RARE.HP = 1ListenRange.Say = 40ListenRange.TextEmote = 40ListenRange.Yell = 300GuidReserveSize.Creature = 100GuidReserveSize.GameObject = 100ChatFakeMessagePreventing = 0ChatStrictLinkChecking.Severity = 0ChatStrictLinkChecking.Kick = 0ChatFlood.MessageCount = 10ChatFlood.MessageDelay = 1ChatFlood.MuteTime = 10Channel.SilentlyGMJoin = 0GM.LoginState            = 2GM.Visible               = 2GM.AcceptTickets         = 2GM.Chat                  = 2GM.WhisperingTo          = 2GM.InGMList.Level        = 3GM.InWhoList.Level       = 3GM.LogTrade              = 1GM.StartLevel            = 1GM.LowerSecurity         = 0GM.InvisibleAura         = 31748Visibility.GroupMode = 0Visibility.Distance.Continents    = 90Visibility.Distance.Instances     = 120Visibility.Distance.BG            = 180Visibility.Distance.InFlight      = 100Visibility.Distance.Grey.Unit   = 1Visibility.Distance.Grey.Object = 10Visibility.RelocationLowerLimit    = 10Visibility.AIRelocationNotifyDelay = 1000Rate.Health = 1Rate.Mana = 1Rate.Rage.Income = 1Rate.Rage.Loss = 1Rate.Focus = 1Rate.Loyalty = 1Rate.Energy = 1Rate.Skill.Discovery = 1Rate.Drop.Item.Poor = 1Rate.Drop.Item.Normal = 1Rate.Drop.Item.Uncommon = 1Rate.Drop.Item.Rare = 1Rate.Drop.Item.Epic = 1Rate.Drop.Item.Legendary = 1Rate.Drop.Item.Artifact = 1Rate.Drop.Item.Referenced = 1Rate.Drop.Money = 1Rate.XP.Kill    = 1Rate.XP.Quest   = 1Rate.XP.Explore = 1Rate.Rest.InGame = 1Rate.Rest.Offline.InTavernOrCity = 1Rate.Rest.Offline.InWilderness = 1Rate.Damage.Fall = 1Rate.Auction.Time = 1Rate.Auction.Deposit = 1Rate.Auction.Cut = 1Auction.Deposit.Min = 0Rate.Honor = 1Rate.Mining.Amount = 1Rate.Mining.Next   = 1Rate.Talent = 1Rate.Reputation.Gain = 1Rate.Reputation.LowLevel.Kill    = 0.2Rate.Reputation.LowLevel.Quest   = 1Rate.InstanceResetTime = 1SkillGain.Crafting = 1SkillGain.Defense = 1SkillGain.Gathering = 1SkillGain.Weapon = 1SkillChance.Orange = 100SkillChance.Yellow = 75SkillChance.Green  = 25SkillChance.Grey   = 0SkillChance.MiningSteps   = 0SkillChance.SkinningSteps = 0SkillFail.Loot.Fishing = 0SkillFail.Gain.Fishing = 0SkillFail.Possible.FishingPool = 1DurabilityLossChance.Damage = 0.5DurabilityLossChance.Absorb = 0.5DurabilityLossChance.Parry  = 0.05DurabilityLossChance.Block  = 0.05Death.SicknessLevel = 11Death.CorpseReclaimDelay.PvP = 1Death.CorpseReclaimDelay.PvE = 1Death.Bones.World = 1Death.Bones.Battleground = 1Death.Ghost.RunSpeed.World = 1.0Death.Ghost.RunSpeed.Battleground = 1.0Battleground.CastDeserter = 1Battleground.QueueAnnouncer.Join = 0Battleground.QueueAnnouncer.Start = 0Battleground.ScoreStatistics = 0Battleground.InvitationType = 0BattleGround.PrematureFinishTimer = 300000BattleGround.PremadeGroupWaitForMatch = 0OutdoorPvp.SIEnabled = 1OutdoorPvp.EPEnabled = 1Network.Threads = 1Network.OutKBuff = -1Network.OutUBuff = 65536Network.TcpNodelay = 1Network.KickOnBadPacket = 0Console.Enable = 0Ra.Enable = 0Ra.IP = 0.0.0.0Ra.Port = 3443Ra.MinLevel = 3Ra.Secure = 1Ra.Stricted = 1SOAP.Enabled = 0SOAP.IP = 10.10.10.10SOAP.Port = 7878CharDelete.Method = 0CharDelete.MinLevel = 0CharDelete.KeepDays = 30cat /usr/local/wow_mangos/etc/realmd.conf |grep -v ^# |grep -v ^$ [RealmdConf]ConfVersion=2010062001LoginDatabaseInfo = "10.10.10.10;3310;mangos;mangos;realmd"LogsDir = ""MaxPingTime = 30RealmServerPort = 3724BindIP = "0.0.0.0"PidFile = ""LogLevel = 0LogTime = 0LogFile = "Realmd.log"LogTimestamp = 0LogFileLevel = 0LogColors = ""UseProcessors = 0ProcessPriority = 1WaitAtStartupError = 0RealmsStateUpdateDelay = 20WrongPass.MaxCount = 0WrongPass.BanTime = 600WrongPass.BanType = 0

9、启动服务器

cat /usr/local/wow_mangos/bin/startup.sh

启动脚本内容如下：

#!/bin/sh
# usage : sh shutdown.sh
# author : nagle
# date   : Sat Jan 21 16:10:11 CST 2017
# website:  https://github.com/geektcpbase_dir=`dirname $0`/..cd $base_dir/bin/export LD_LIBRARY_PATH=/usr/local/gcc-4.9.3/lib64/:$base_dir/libnohup $base_dir/bin/realmd 2>&1 >> $base_dir/logs/nohup_realmd.out &$base_dir/bin/mangosd

cat /usr/local/wow_mangos/bin/shutdown.sh

关闭脚本内容：

#!/bin/sh
# usage : sh shutdown.sh
# author : nagle
# date   : Sat Jan 21 16:10:11 CST 2017
# website: https://github.com/geektcpps -ef |grep wow_mangos |grep wow|grep -v grep |grep -v local|awk '{print $2}' |xargs -t -i kill -9 {}

alais 环境变量 (方便启动，可以忽略)：

cat ~/.bash_profile

alias startmangos='screen -S thy -X screen su - wow -c /usr/local/wow_mangos/bin/startup.sh'alias stopmanos='screen -S thy -X screen su - wow -c /usr/local/wow_mangos/bin/shutdown.sh'

10、创建账号

如果启动 mangosd 服务端时，配置文件指定了启用控制台，那么可以在控制台输入命令：

account create nagle 123

即可创建一个帐号为 nagle，密码为 123 的帐号了。

另外通过数据库也可以创建账号，对应的 sql 语句是：

SET
@username = "test1",
@password = "123",
@email = "test@163.com",
@expansion = 0,  -- 0表示经典旧时， 1表示70年代，一次类推
@gmlevel = 0,   -- 0 = player, 1=GM, 2=Moderator, 3=Admin, 4=Console
@realmid = 1;INSERT INTO account
(username, sha_pass_hash, gmlevel, email, expansion, active_realm_id)
VALUES (
UPPER(@username),
(SHA1(CONCAT(UPPER(@username),
':', UPPER (@password))) ),
@gmlevel,
@email,
@expansion,
@realmid
);INSERT INTO `realmd`.`realmcharacters` (`realmid`, `acctid`) VALUES ('1', '5');

查看全文

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.dgrt.cn/a/2083771.html

如若内容造成侵权/违法违规/事实不符，请联系一条长河网进行投诉反馈，一经查实，立即删除！

魔兽世界60级1.12私服搭建架设教程

一、背景
60 魔兽经典旧世是最经典的版本，遗憾的是 60 年代时还在大学读书，穷得很，买不起点卡，后来工作了，大概 70 年代开始玩的。
多年以前，玩游戏时，一直非常期望能够自己控制角色的属性级别……

编程日记2023/3/28 17:39:30

web测试6:selenium实现web自动化

selenium支持web浏览器的自动化，主要由三个工具构成，WebDriver，IDE，Grid https://selenium-python.readthedocs.io/ (selenium官方使用文档)…

编程日记2023/3/28 17:39:21

深度剖析Linux进程的内部机制：一探/proc/pid的奥秘

一探/proc/pid的奥秘I. 介绍/proc目录/proc目录的作用/proc目录结构II. /proc/pid目录/proc/pid目录的作用/proc/pid目录结构III. 常见的/proc/pid信息/proc/pid/attr:安全相关的选项/proc/pid/autogroup：该目录包含了进程的自动分组信息。/proc/pid/auxv&#xff1……

编程日记2023/3/28 17:39:10

PMP项目管理认证第一节（备考阶段准备）

前言：PMP是什么： PMP指的是项目管理专业人士资格认证。它是由美国项目管理协会（Project Management Institute，简称PMI）发起的，严格评估项目管理人员知识技能是否具有高品质的资格认证考试为什么要考pmp&a……

编程日记2023/3/28 17:38:57

Autosar标准

AUTOSAR（Automotive Open System Architecture）是一种标准化的汽车软件体系结构，由全球主要汽车制造商、电子制造商和软件供应商联合开发。 AUTOSAR致力于创建一种开放的、标准化的软件体系结构，以便各种汽车设备的软件可以更轻松……

编程日记2023/3/28 17:38:42

clion配置Linux远程开发环境–开发QT桌面软件

clion配置Linux远程开发环境–开发QT桌面软件
环境准备首先准备一台windows 电脑准备一台ubuntu电脑 win11使用WSL2配置Ubuntu 环境_turbolove的博客-CSDN博客ubuntu需要有正常的开发环境，需要有QT环境保证两台电脑可以正常通信 CLion windows 使用MobaXter……

编程日记2023/3/28 17:38:09

集合遍历元素并删除的正确姿势

Alibaba Java开发手册中指出，不要在 foreach 循环里进行元素的 remove/add 操作，那么进行这些操作到底会产生什么样的结果呢？
我们先来写个实例看看。
public class TestForeach {public static void main(String[] args) {List<Integer……

编程日记2023/3/28 17:37:59

Pandas对Excel文件进行读取、增删、打开、保存等操作的代码实现

文章目录前言一、Pandas 的主要函数包括二、使用步骤1.简单示例2.保存Excel操作3.删除和添加数据4.添加新的表单总结前言
Pandas 是一种基于 NumPy 的开源数据分析工具，用于处理和分析大量数据。Pandas 模块提供了一组高效的工具，可以轻松地读取、处理和……

编程日记2023/3/28 17:37:45

【DockerCE】使用Docker安装运行性能测试工具-RunnerGo

一、安装环境
CentOS-7.9 / Docker-CE-23.0.1 / Docker-compose-2.17.2
二、资源配置
4核8G（官方建议8核16GB）
三、安装运行
从Github下载安装所需的文件包（版本1.0.3），这里选择的是tar.gz包将压缩包里面的runne……

编程日记2023/3/28 17:37:32

Leveldb源码解读——Memtable(跳表)详解

在leveldb中的memtable实际上是对核心数据结构skipList做了一个包装，并对外提供了接口。
使用让我们一起来研究一下跳表
为什么使用跳表
因为memtable为了更快的查询，是一个sortmap要求。一般会采用红黑树，不过LevelDB采用的是Skiplist。S……

编程日记2023/3/28 17:37:21

English Learning – L2 第 14 次小组纠音复习元音 [ɔɪ ] [aʊ] [əʊ] [ɪə] 弱读 2023.4.12 周三

English Learning – L2 第 14 次小组纠音复习元音 [ɔɪ ] [aʊ] [əʊ] [ɪə] 弱读 2023.4.12 周三共性问题coin voice /kɔɪn/ /vɔɪs/ 中 ɔɪvowel pounds /ˈvaʊəl/ /paʊndz/ 中的 aʊshow /ʃəʊ/beer nearly /bɪə/ /ˈnɪəlɪ/ 中的 ɪəbest bed ten /best/……

编程日记2023/4/16 14:59:59

LC-1157. 子数组中占绝大多数的元素（二分查找+随即猜，摩尔投票+线段树，upper_bound和lower_bound函数）

文章目录[1157. 子数组中占绝大多数的元素](https://leetcode.cn/problems/online-majority-element-in-subarray/)统计每个元素的索引-超时二分查找随机猜摩尔投票线段树[剑指 Offer 39. 数组中出现次数超过一半的数字](https://leetcode.cn/problems/shu-zu-zhong-chu-xi……

编程日记2023/4/16 14:59:45