how can I use more "Unit"s in one LUA file

[Gix85]

Hello!
I've a problem with LUA scripting...I'll explain it with an example

npc A (ID: 1)
npc B (ID: 2)

now....I'm working in A.lua and I want that ,when B's health is < 10%, then A has to begin "phase 2".. (I can work only in A.lua)
so...

function A_OnCombat(Unit (which is A's ID) , Unit1 (which is B's ID....theoretically), event)
if Unit1:GetHealthPct() < 10 then
Unit:RegisterEvent("A_phase2",500,0)
end
end

RegisterUnitEvent(1,1,"A_OnCombat") <---- here I say that Unit is npc A

but B???? how can I say that Unit1 is npc B??

I thought to write a "local variable" on the top of the LUA file......but I don't know how use it...... "local Unit1 = NPCID(2)" ??............ I suppose that it's wrong (obviously)....So how I can solve this problem?

I hope someone helps me!
waiting for your answer!

bye

[stoneharry]

local Unit1 = nil
^
At top of script.

function bla bla
if health < 10 then
register event

Unit1 = pUnit:GetCreatureNearestCoords(x,y,z,id) -- fill this in, x,y,z of the npc you want to target and his entry ID

end

[Gix85]

so...should be
"
local Unit1 = nil

function A_OnCombat(Unit, Unit1, event)
Unit1 = Unit:GetCreatureNearestCoords(x,y,z,2)
if Unit1:GetHealthPct() < 10 then
Unit:RegisterEvent("A_phase2",500,0)
end
end "

?

still not works

[stoneharry]

you need to change the x,y,z of where the "Unit1" is. You've set his NPC ID to 2, which I doubt it is.

[Gix85]

XD of course! in the real LUA, I've put the real coordinates x,y,z and the real ID of the creature! ......in the previous post,I've put 2 because it is B's ID in the example!
anyway....still not works
In the log, there's write that Unit1 is a nil value....

[stoneharry]

Basically it's trying to find the creature and it can't, because it hasn't found the creature there.

This method only checks within a small amount of X, Y and Z of the specified location, so the creature has to be more or less on it.

Alternately, you can do this:

local Unit1 = nil

function A_OnCombat(Unit, Unit1, event)
if Unit1:GetHealthPct() < 10 then
Unit:RegisterEvent("A_phase2",500,0)
end
end

--- script stuff

function Unit1_Spawns_SoWeDefine(pUnit, Event)
Unit1 = pUnit
end

RegisterUnitEvent(npcid, 18, "Unit1_Spawns_SoWeDefine")