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This section describes functions and statements that will be used in Lua but are specific to Aardwolf and are considered "additions" to Lua for the purposes of integrating with the MUD.

There are two main aspects to using Lua for MUD scripts - accessing object properties and calling MUD functions to do something in the game.

Lua Global Variables

The following Lua objects are always defined wherever their use is appropriate:

self (type ch):
The mob the program is currently running on. For example, if a guard triggers a program from a 'greet' trigger, 'self' will always refer to that guard. On a program attached to a mob, 'self' will always be defined. This may not be true on programs attached to rooms and objects.
ch: (type ch):
When a program is triggered by another character, 'ch' will be the character that triggered the prog. On a greet trigger it will be the character that entered the room. If an object has a wield trigger, it will be the character that wielded the item. On random/timed progs that fire without needing a character to trigger them, 'ch' may not be defined.
obj (type obj):
Type (OBJ) : If a prog is attached to an object, or is a character trigger that involves an item (a give trigger for example), obj will always be the object that triggered the program.
room (type room):
If a program is attached to a room, room will always be the room the program is running on.
mud (type mud)
MUD refers to the game itself and is used to access global mud properties such as the time of day, the current season, number online, etc.

It is important to know these variables and the properties they expose (below) as 99% of the time these are the only variables you will need to work with. Some MUD functions will return new variables of type CH, ROOM or OBJ and all properties available to the global variables will be available to these new values. For example, when you call the mud function to return a random character from the room, you will receive back a variable of type (CH).

The next step is to learn about the exposed Lua/MUD Object Properties.

Then move on to learn about using the Lua/MUD Functions.