1: Right-Click the Doom 3 short cut and select "Copy" then "Paste" it in the same place (so you get "Copy of Shortcut to Doom" or something similar).

2: Rename this shortcut to "DOOMEdit"

3: Right-click the new shortcut and select "Properties". Specify the following for "Target":
"C:\Doom3\Doom3.exe" +set r_fullscreen 0 +editor +set com_allowConsole 1
(This of course assumes you have Doom 3 installed in C:\Doom3\)

The editor does not work with antialiasing turned on, so you may need to add:
+set r_multiSamples 0

The first time you open DOOMEdit, you will want to click File->Project Settings and change all the paths to point to wherever you have Doom 3 installed (by default they are set to where the level designers here at id have Doom 3 installed). There is a small bug in that dialog box, after you click OK, you will need to copy the "doom.qe4" into the "base" folder.

它们之间的关系是：CallableCaller被Callable包含，Signal与Callable或CallableCaller链接（Signal<...>::Connect(...)）,Connection和ScopedConnection是Signal做链接时，需要做管理用的小对象，相当于句柄类型，同时Connection是常规版本，而ScopedConnection是在作用域内自动释放连接。

eg:

Functions::Callable cv(function1);

Functions::Callable ci(function1_1);

cv();

int r = ci();

Functions::Callable callr(function3_int);

r = callr(23,23);

Functions::Callable call(function3);

call(3,4);

Functions::Signal sign1;

Functions::Signal sign2;

Functions::Connection con = sign1.Connect(callr);

Functions::Connection con2 = sign2.Connect(call);

r = sign1(3,4);

sign2(8,3);

con2.Disconnect();

con.Disconnect();

限制：暂时支持此最多4个参数的函数，暂时不支持成组的信号连接，未考虑线程安全性。

优势: 支持成员函数绑定，由于已经做了适当的代码展开，编译速度比起Loki和Boost中对应的仿函数之类快好多，由此也看出Id Software的Ph.D们务实的作风。在理解所组织的代码后，很容易向更多的参数扩充。控制在有限的代码量内，所以够小。

本人看懂后，对原来代码稍作了些改进。改进后非常统一，而且语义清晰，但发现Signal类的operator (...)与原来稍有不同了，原因在于这个重载的操作符的返回值上。~ ^^!

这里附上header \ *.lib http://code.google.com/p/us-engine/downloads/list