Undertale Yellow script viewer

function lines_intersect(argument0, argument1, argument2, argument3, argument4, argument5, argument6, argument7) //gml_Script_lines_intersect

{

    var _x1 = argument0

    var _y1 = argument1

    var _x2 = argument2

    var _y2 = argument3

    var _x3 = argument4

    var _y3 = argument5

    var _x4 = argument6

    var _y4 = argument7

    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;

}