show allmission objects

sao.sqf

if (!isNil "eh") then {removeMissionEventHandler ["Draw3D", eh];};
eh = addMissionEventHandler["Draw3D", {
    {
        private _pos = position _x;
        
        drawLine3D [[(_pos select 0) - 1, (_pos select 1) - 1, (_pos select 2) - 1], [(_pos select 0) - 1, (_pos select 1) + 1, (_pos select 2) - 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) - 1, (_pos select 1) - 1, (_pos select 2) - 1], [(_pos select 0) - 1, (_pos select 1) - 1, (_pos select 2) + 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) - 1, (_pos select 1) - 1, (_pos select 2) - 1], [(_pos select 0) + 1, (_pos select 1) - 1, (_pos select 2) - 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) + 1, (_pos select 1) + 1, (_pos select 2) + 1], [(_pos select 0) + 1, (_pos select 1) - 1, (_pos select 2) + 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) + 1, (_pos select 1) + 1, (_pos select 2) + 1], [(_pos select 0) - 1, (_pos select 1) + 1, (_pos select 2) + 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) + 1, (_pos select 1) + 1, (_pos select 2) + 1], [(_pos select 0) + 1, (_pos select 1) + 1, (_pos select 2) - 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) + 1, (_pos select 1) - 1, (_pos select 2) + 1], [(_pos select 0) + 1, (_pos select 1) + 1, (_pos select 2) - 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) - 1, (_pos select 1) + 1, (_pos select 2) - 1], [(_pos select 0) + 1, (_pos select 1) + 1, (_pos select 2) - 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) + 1, (_pos select 1) - 1, (_pos select 2) + 1], [(_pos select 0) - 1, (_pos select 1) - 1, (_pos select 2) + 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) - 1, (_pos select 1) + 1, (_pos select 2) + 1], [(_pos select 0) - 1, (_pos select 1) - 1, (_pos select 2) + 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) - 1, (_pos select 1) + 1, (_pos select 2) + 1], [(_pos select 0) - 1, (_pos select 1) + 1, (_pos select 2) - 1], [1, 0, 0, 1]];
        drawLine3D [[(_pos select 0) + 1, (_pos select 1) - 1, (_pos select 2) - 1], [(_pos select 0) + 1, (_pos select 1) - 1, (_pos select 2) + 1], [1, 0, 0, 1]];
        false
    } count allMissionObjects "EmptyDetector";
}];