Triggers

function Trig_Swap_Conditions takes nothing returns boolean
    return GetSpellAbilityId() == 'A002'
endfunction

function Trig_Swap_Actions takes nothing returns nothing
    local unit caster = GetTriggerUnit()
    local unit target = GetSpellTargetUnit()
    local real cx = GetUnitX(caster)
    local real cy = GetUnitY(caster)
    local real tx = GetUnitX(target)
    local real ty = GetUnitY(target)

    call SetUnitX(caster, tx) //this set the X of caster to target X
    call SetUnitY(caster, ty) //same as above but for Y
    call SetUnitX(target, cx) //this set X of target to caster X
    call SetUnitY(target, cy) //same as above but for Y
    set caster = null
    set target = null
endfunction

//===========================================================================
function InitTrig_Swap takes nothing returns nothing
    set gg_trg_Swap = CreateTrigger()
    call TriggerRegisterAnyUnitEventBJ(gg_trg_Swap, EVENT_PLAYER_UNIT_SPELL_EFFECT)
    call TriggerAddCondition(gg_trg_Swap, Condition(function Trig_Swap_Conditions))
    call TriggerAddAction(gg_trg_Swap, function Trig_Swap_Actions)
endfunction