question about lua

[asimov59]

Hello everyone, and long life to FAF (yes this is my first message)

First sorry because my english is bad, so thank you for doing the reading effort.

I have some idea for FA mods and i want to create them, for information i have already using lua for scripting (crysis war on server side) so i'm not totally noob but not so good too

I have find a quick reference here: http://supcom.wikia.com/wiki/LUADOC_1.5.3599

So i want to do some test with GetUnitsInRect()

When i try to call it i have a message error : "access to nonexistent global..."

No problem: i search in all Lua file the GetUnitsInRect déclaration location and next i import the function. But i don't see the declaration anywhere.

In wiki this function is under "Sim.<global>"

My question is pretty simple finally: how to call a function declared under "scope" like Sim.<global> for example ?


I'm sure is quite simple but i'm totally blocked with that.

Best Regard,

asimov59

[Myxir]

Sim.<global> functions can be directly called from anywhere within the Sim, without importing the function
if that does not work for you, you're probably tinkering with UI code, which is unable to use the Sim functions

http://wiki.faforever.com/index.php?tit ... Sim_and_UI

[asimov59]

Exactly, I call this function from _BeatFunction from /lua/ui/game/economy.lua

If I understand, If I want to get some units with UnitInRect and draw informations about these units i must get the data somewhere in Sim and use UserSync to have theses data available from UI.

I think it should take me some time to understand that.

First mod i want to do is an economic helper, so i want access eco data to all of my units, do some stuff on data and draw infos on screen. Are they already available from UI ?

And last it's more an ethic question (probably better ask in other topic),

making a predictive economic graph(how is your eco and how much ressource in the next few minuts based on actual ressource and engies and structure action stack) is a borderline mod you think ? I have some pros and cons in mind

[Myxir]

you can access all selected units from the UI, their focused units, ... in short, it's possible to have a list of all units that you own, their position, health, resource drain etc.
i advise to use the common mod tools mod by Crotalus for this

Code: Select all

local units = import('/mods/common/units.lua')

function getUnitsInRect(x0, z0, x1,z1)
    local inRect = {}
    local pos, x, z = {}, 0, 0
    for _,u in units.Get() do
        pos = u:GetPosition()
        x, z = pos[1], pos[3]
        if (x >= x0) and (x <= x1) and (z >= z0) and (z <= z1) then
            table.insert(inRect, u)
        end
    end
    return inRect
end


do not forget to require the mod for your own though (in your mod info file), to ensure you don't run into import errors

Code: Select all

requires = {"zcbf6277-24e3-437a-b968-Common-v1"}

[asimov59]

Exactly what I need ! now i have just to learn how to use UI and do the stuff

thank you so much for the help Myxir !