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//attack -> add damage event -> function


function damaging takes nothing returns nothing
    local integer i = 0
    local integer h = GetHandleId(GetExpiredTimer())
    local unit damager = LoadUnitHandle(udg_data, h, 0)
    local unit damaged = LoadUnitHandle(udg_data, h, 1)
    local real radius = GetRandomReal(udg_minradius, udg_maxradius) 
    local location tmp = PolarProjectionBJ(GetUnitLoc(damaged), radius, GetRandomReal(0, 360))      
    local unit u = CreateUnit(GetOwningPlayer(damager), 'h000', GetLocationX(tmp), GetLocationY(tmp), 0 )  
    call SetUnitInvulnerable( damaged, false )
    call DestroyEffect(AddSpecialEffectLoc( udg_effect_name, tmp ))
    call UnitDamagePointLoc( u, 0, udg_damage_radius, tmp, udg_damage, ATTACK_TYPE_PIERCE, DAMAGE_TYPE_NORMAL ) 
    call RemoveUnit(u)
    set u = null
endfunction

function get_damage takes nothing returns nothing
    local timer t = CreateTimer()
    local integer h = GetHandleId(GetTriggeringTrigger())
    local unit damager = LoadUnitHandle(udg_data, h, 0)
    local unit damaged = LoadUnitHandle(udg_data, h, 1)
    local integer h = GetHandleId(t)                                     
    call SaveUnitHandle(udg_data, h, 0, damager)
    call SaveUnitHandle(udg_data, h, 1, damaged)
    call SetUnitInvulnerable( GetTriggerUnit(), true )
    call TimerStart(t, 0.0, false, function damaging)
    call DestroyTrigger(GetTriggeringTrigger())
endfunction

function Trig_attacking_Conditions takes nothing returns boolean
    return GetUnitTypeId(GetAttacker()) == 'hrif'
endfunction

function Trig_attacking_Actions takes nothing returns nothing
    local trigger t = CreateTrigger()
    local integer h = GetHandleId(t)
    call TriggerRegisterUnitEvent( t, GetTriggerUnit(), EVENT_UNIT_DAMAGED )            
    call TriggerAddAction(t, function get_damage)
    call SaveUnitHandle(udg_data, h, 0, GetAttacker())
    call SaveUnitHandle(udg_data, h, 1, GetTriggerUnit())
endfunction

function InitTrig_attacking takes nothing returns nothing
    set gg_trg_attacking = CreateTrigger(  )
    call TriggerRegisterAnyUnitEventBJ( gg_trg_attacking, EVENT_PLAYER_UNIT_ATTACKED )
    call TriggerAddCondition( gg_trg_attacking, Condition( function Trig_attacking_Conditions ) )
    call TriggerAddAction( gg_trg_attacking, function Trig_attacking_Actions )
endfunction