View source for Zh/Source 2013

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{{src13|4}}引擎分支（又称 '''SteamPipe''' 分支）是{{orangebox|3.1|nt=0}}分支的最终迭代。它由 Valve 于 2013 年推出，旨在用{{l4dbranch|3.1}}引擎分支中引入的 {{L|VPK}} 格式取代过时的 {{L|GCF}} 文件格式。<br>
内容发生了重大变化，所有使用 {{src09|3.1}}和{{srcmp|3.1}}分支的 Valve 游戏都升级到了该分支。{{hls|3.1}} 从{{src06|4}}引擎分支升级为该引擎分支。<br>
{{path|custom}}文件夹是为了让修改更容易，并作为每个起源游戏的安装路径而添加的。
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SteamPipe 因简化了起源引擎挂载内容的方式并包含了之前未发布的{{tf2|4}}代码而备受赞誉，但它也破坏了无数的mod，并使{{src09|3.1}}分支中已经存在的问题更加严重，此外还导致了{{hls|3.1}}出现了更多的{{L|Half-Life: Source Bugs|bug}}。它也没有{{l4dbranch|3.1}}分支的大部分功能。不过，随着时间的推移，引擎分支不断完善，现在已成为使用的主要分支。
{{src13|4}} 分为两个子分支， {{src13sp|4}} 和 {{src13mp|4}}，它们分别取代了 {{src09|3.1}} 和 {{srcmp|3.1}} 分支。这两个子分支基本上是可互换的，但它们使用单独的代码库，并且多人分支具有单人分支中不可用的一些[[#Features|功能]]。
{{tip|尽管名称不同，'''但这两个分支都可以用于单人游戏'''。<br>由于多人游戏分支的附加功能所带来的好处（静态道具 lightmaps 和 BSP 压缩），只有在使用{{mapbase|3.1}}等基础mod或制作不修改游戏代码的单人mod时，才应使用单人分支。}}

== 功能 ==
来自 {{Src09|4}} 引擎分支的新功能：
; {{L|VPK}} files and {{path|custom}} folder
: First introduced on {{l4dbranch|4}} and onwards, it was later available on {{src13|4}}, which replaced the old {{L|GCF}} format. This also adds support for reading any files from "custom" folder.
; {{Linux|4}} support
: The engine can now run on Linux. However, Linux support outside of official games may be spotty.
; [[prop_static#Keyvalues|Static prop lightmaps]] {{src13mp|only}}{{gmod|also}}
: Static props without {{L|bump map}}s can now use {{L|lightmap}}s. 
; [[$color#Additional_Model_Parameters|Per-texel color tint masking for models]]
: <code>$blendtintbybasealpha</code> is ported from the {{l4dbranch|2}}. {{src13|2}} includes an exclusive additional parameter, <code>$blendtintcoloroverbase</code>.
; {{L|$treeSway|Swaying trees}} {{only|{{tf2}}{{bms}}{{gmod}}{{mapbase}}}}
: A material parameter that gives the effect of trees swaying in the wind.
; [[BSPZIP#Compression|BSP 压缩]] {{src13mp|only}}
: {{L|.bsp (Source)|BSP}} maps and packed files can be losslessly compressed on both server and client.
; {{L|VScript}} {{only|{{tf2}}{{gmod}}{{mapbase}}}}
: A powerful new scripting system primarily using {{L|Squirrel}} (if {{tf2}}{{mapbase}}), Lua (if {{gmod}}).

== 可用性 ==
Source 2013 多人游戏和单人游戏分支的游戏代码都包含在 Valve 的 [https://github.com/ValveSoftware/source-sdk-2013 Source SDK 2013 repository] 存储库。
{{warning|By default, some of the gamecode for the SDK 2013 are massively out of date, and does not contain many updates and bug fixes (such as {{L|Dropship}} gun fix) that was introduced in {{hl2|3.1}} and {{portal|3.1}} (since the new {{steamdeck|3.1}} update) respectively, nor the "'''upcoming'''" builds on Steam, along with the rest of {{src13|3.1}} games. Furthermore, the MP builds (on Steam) are more up to date than the SP builds.}}

===<span style="color:#9bf442">Source 2013 Singleplayer</span>===
Deprecates {{Src09|4}}

* {{src13sp|4|nt=0}}
* {{hl2|4}}
* {{hl2lc|4}}
* {{hl2ep1|4}}
* {{hl2ep2|4}}
* {{hls|4}}
* {{portal|4}}

====第三方====
* {{mapbase|4}}
* {{hl2u|4}} (earlier version)
* {{LCategory|Source_2013_SP_engine_branch_games|More...}}

===<span style="color:#d3f442">Source 2013 Multiplayer</span>===
Deprecates {{Srcmp|4}}

* {{src13mp|4|nt=0}}
* {{css|4}}
* {{dods|4}}
* {{hldms|4}}
* {{hl2dm|4}}
* {{tf2|4}}
====第三方====
* {{bb2|4}}
* {{fof|4}}
* {{Empires|4}}
* {{hdtf|4}}
* {{zps|4}}
* {{LCategory|Source_2013_MP_engine_branch_games|More...}}

===第三方使用 Source 2013 分支===
The following games use neither {{src13sp}} nor {{src13mp}}, but rather use custom (heavily modified) branches forked earlier versions from both Source 2013 branches, with newer features added on. As such, they may or may not include all features from newer first-party versions of Source 2013, such as [[BSPZIP#Compression|LZMA-compressed BSPs]] or {{L|$lightmap|lightmapped MDLs}}.
* {{bms|4}} (branch also known as "Xengine")
* {{gmod|4}} (which also support some features from Alien Swarm, Portal 2 engine branch and onwards, such as partial VTF 7.5 support). Also have 64-bit executable.

== 另见 ==
* {{L|Source SDK 2013 community repos}}

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{{ACategory|Official Engine Branches}}