Running code when a unit is created

[EntropyWins]

I'd like a way to run lua code when a unit gets created. In a map script. Something like this function:

oncreated.png (2.65 KiB) Viewed 3091 times

I've been looking through quite a lot of the FA/FAF lua code and have not found anything providing such functionality. Is there really no way of doing this?

Of course there is one way... which is what I did here https://pastebin.com/KBM72wBv . Having to loop through all units and seeing if there is a new one every tick is quite stupid though, especially if the game already provides a more sane way of reacting to the unit creation event.

[speed2]

Hooking this function https://github.com/FAForever/fa/blob/de ... t.lua#L155

[EntropyWins]

Hooking that function is not possible in a map script. So I am still looking for a way to do this.

The lua script I linked in my post also has a number of issues, with one of them maybe not fixable. Hence all the more reason to have a sane existing way to react to unit creation.

[speed2]

Cause it's not something that the map script should be able to do.

[EntropyWins]

I'm going to assume you are saying that hooking that function is not something a map script should be able to do. If on the other hand you are saying that a map script should not be able to react to an "unit created" even, then my reaction is WHY THE FIRGATE NOT?!!! Since this is super useful for many things. For instance to apply health buffs, to bind expiry timers, to remove wreckages, etc.

[Uveso]

its no question if you should, you can't.

Unitblueprints are initalized inside blueprint.lua and will be registered inside the c-engine there.

if you now change the blueprint in your mapscript, it will not be registered inside the c-engine.

And woops desync...

[Edit]
(all c-engine commands will get the old unit data, but if you read the blueprint itself you will get the new data.
And this is only working local, not in multiplayer)

[EntropyWins]

Yeah sure, so forget about hooking the that function. That is not what I am asking about. I'm asking if there is a way to run code when a unit gets created. Is there seriously no event of sorts for that?

[Uveso]

No, you must hook that function. This function is the event.

[DDDX]

I use this for my "is Paragon built" script:

Code: Select all

for x, army in ListArmies() do                               
                 if (army == "ARMY_1" or army == "ARMY_2" or army == "ARMY_3" or army == "ARMY_4" or army == "ARMY_5" or army == "ARMY_6") then
                     List = GetArmyBrain(army):GetListOfUnits(categories.xab1401, false, true)
                         for k, unit in List do      
                           if (unit:GetUnitId() == 'xab1401') then
                               if not (unit:GetFractionComplete() ~= 1) then

the last segment is to let the map know the unit is completed and not merely being built

[EntropyWins]

Thanks for sharing DDDX! I did not know GetListOfUnits and have some good uses for it.

Looks like you have a double negation in your inner if predicate. And is the one above really needed given you already filter on categories.xab1401? Finally, if you do not use the key in a for loop, I believe it is convention to name it _.