seg/line/ray in plane collision math GML

gistfile1.txt

function sd_seg_in_plane(_r0, _r1, _plane)
{
    var _ab = vec3_subtract(_r0, _r1);
    var _pn = sd_plane_get_normal(_plane);
    var _pd = sd_plane_get_distance(_plane);
    var _t = (_pd - vec3_dot(_pn, _r0)) / vec3_dot(_pn, _ab);
    if(_t >= 0 and _t <= 1)
    {
        var _q = vec3_add(_r0, vec3_scale(_ab, _t));
        return sd_collision_return(true, _plane, _q);
    }
    else
    {
        return sd_collision_return(false);
    }
}