Many triggers in one

[Garfield1337]

I'm learning JASS so i've got 2 questions.
-I saw few times that several triggers are squeezed inside single trigger,but i don't know how to do it because i can't add multiple events for different actions inside single trigger =/
Shortly,how to add functions of multiple triggers into one trigger?

-Why doesn't this work:

function Drone_Bomb_Cast takes nothing returns nothing
    local location Loc1
    local location Loc2
    set Loc1 = GetUnitLoc(GetTriggerUnit())
    set Loc2 = GetSpellTargetLoc()
    call CreateUnitAtLoc(GetPlayerId(GetOwningPlayer(GetTriggerUnit())),'h002',Loc1,AngleBetweenPoints(Loc1,Loc2))
endfunction

It says invalid argument type for last line.

 

[Pharaoh_]

Ok, first off: More than one trigger events into a single trigger.
You will firstly need a trigger with the main event. Let's say that we want a passive skill, which, when you take damage, it will heal you for 3* damage taken. Here:

function Trig_On_Conditions takes nothing returns boolean
    return GetLearnedSkill() == 'AHbn'
endfunction

function NewTrigger takes nothing returns nothing
    local unit u = GetTriggerUnit()
    local real r = GetEventDamage()
    local real r2 = r * 3
    call SetWidgetLife (u, r2)
    set u = null
endfunction

function Trig_On_Actions takes nothing returns nothing
    local unit u = GetTriggerUnit()
    local trigger t = CreateTrigger()
    call TriggerRegisterUnitEvent (t, u, EVENT_UNIT_DAMAGED)
    call TriggerAddAction (t, function NewTrigger)
    set u = null
endfunction

//===========================================================================
function InitTrig_On takes nothing returns nothing
    local trigger t = CreateTrigger(  )
    call TriggerRegisterAnyUnitEventBJ( t, EVENT_PLAYER_HERO_SKILL )
    call TriggerAddCondition( t, Condition( function Trig_On_Conditions ) )
    call TriggerAddAction( t, function Trig_On_Actions )
endfunction

Second, should be:

call CreateUnitAtLoc(GetOwningPlayer(GetTriggerUnit()),'h002',Loc1,AngleBetweenPoints(Loc1,Loc2))

 

[Garfield1337]

Thanks,just one more question. Can i,for example,create a trigger that will execute at the start of map which will create all map's triggers so all triggers are actually put in one.
Also,do i have to null local variable 't'?

EDIT: can't give you +repz0rz cuz i must spread first,sry =/