Accessing data found in another object/script

To my knowledge, there are no global variables, and you can't create public object properties. But you're not out of luck.

You can get and set an object's property using .getVar/.getTable and .setVar/.setTable. Docs.

For example,

Object aaaaaa

function onChat(message, player)
    local o = getObjectFromGUID("bbbbbb")
    local x = o.getVar("x")
    x = x + 1
    o.setVar("x", x)
    print(x)
end

Object bbbbbb

x = 0

You can also use Global.getVar(...), etc.

Alternatively, you can create a method, and call using .call. This provides better encapsulation.

For example,

Object aaaaaa

function onChat(message, player)
    local o = getObjectFromGUID("82fbcf")
    local x = o.call("getX")
    x = x + 1
    o.call("setX", { value = x })
    print(x)
end

Object bbbbbb

x = 0

function getX(args)
    return x
end

function setX(args)
    x = args["value"]
end

The argument can only be a table.

You can also use Global.call(...).