cmd_focus

command: /focus

quick ref:

/focus [@playername]

description:

 focus on a given player. if no player, the current player is used. 
/focus			: default to current player. 
/focus  @man	: focus on a player called man

焦点于一个指定的角色。如果没有角色,则使用在默认的操控角色中。