CAN_SEE = {
//_a -кто следит
//_b - за кем следит
    _result = false;
    _a = _this select 0;  
    _b = _this select 1;  
    _dist = _this select 2;
    _eyedv = eyedirection _a;
     _eyed = ((_eyedv select 0) atan2 (_eyedv select 1));   
    _dirto = ([_b, _a] call bis_fnc_dirto);  
    _ang = abs (_dirto - _eyed);
    _eyepa = eyepos _a;
    _eyepb = eyepos _b;
    _tint = terrainintersectasl [_eyepa, _eyepb];
    _lint = lineintersects [_eyepa, _eyepb];
    if (((_ang > 120) && (_ang < 240)) && !(_lint) && !(_tint) and ((_a distance _b) < _dist) and (alive _a)) then
        {_result = true};

_result