function check takes nothing returns nothing
    local destructable d = GetEnumDestructable()
    local location loc = PolarProjectionBJ(GetDestructableLoc(d), 50, 90)
    if(IsUnitInRangeLoc(udg_hero, loc, 50)==true) then
        call ShowDestructableBJ(false, d)
    else
        call ShowDestructableBJ(true, d)
    endif
    call RemoveLocation(loc)
    set d = null
endfunction

function Trig_check_trees_Actions takes nothing returns nothing
    call EnumDestructablesInRectAll(GetEntireMapRect(), function check )
endfunction

//===========================================================================
function InitTrig_check_trees takes nothing returns nothing
    set gg_trg_check_trees = CreateTrigger(  )
    call TriggerRegisterTimerEventPeriodic(gg_trg_check_trees, 0.10) //Но можно ждать и побольше
    call TriggerAddAction( gg_trg_check_trees, function Trig_check_trees_Actions )
endfunction