Undertale Yellow script viewer

function lines_intersect(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7)

{

    var _x1 = arg0;

    var _y1 = arg1;

    var _x2 = arg2;

    var _y2 = arg3;

    var _x3 = arg4;

    var _y3 = arg5;

    var _x4 = arg6;

    var _y4 = arg7;

    var _dir1 = point_direction(_x1, _y1, _x2, _y2);

    var _dir2 = point_direction(_x1, _y1, _x3, _y3);

    var _dir3 = point_direction(_x1, _y1, _x4, _y4);

    var _dir4 = point_direction(_x3, _y3, _x4, _y4);

    var _dir5 = point_direction(_x3, _y3, _x1, _y1);

    var _dir6 = point_direction(_x3, _y3, _x2, _y2);

    var _diff1 = sign(angle_difference(_dir1, _dir2));

    var _diff2 = sign(angle_difference(_dir1, _dir3));

    if (abs(_diff1 + _diff2) > 1)

        return -1;

    _diff1 = sign(angle_difference(_dir4, _dir5));

    _diff2 = sign(angle_difference(_dir4, _dir6));

    if (abs(_diff1 + _diff2) > 1)

        return -1;

    var _C = 90;

    var _A = _dir2 - _dir1;

    var _B = 180 - _A - _C;

    var _c = point_distance(_x1, _y1, _x3, _y3);

    _a = (_c / dsin(_C)) * dsin(_A);

    var _b = (_c / dsin(_C)) * dsin(_B);

    var _l = _b;

    _B = _dir4 - _dir1 - 90;

    _A = 180 - _B - _C;

    if (dsin(_A) == 0)

    {

        var _x = mean(max(min(_x1, _x2), min(_x3, _x4)), min(max(_x1, _x2), max(_x3, _x4)));

        var _y = mean(max(min(_y1, _y2), min(_y3, _y4)), min(max(_y1, _y2), max(_y3, _y4)));

        _l = point_distance(_x1, _y1, _x, _y);

        return _l / point_distance(_x1, _y1, _x2, _y2);

    }

    _b = (_a / dsin(_A)) * dsin(_B);

    _l += _b;

    var _sc = _l / point_distance(_x1, _y1, _x2, _y2);

    return _sc;

}