void CreateArcs(const gp_Pnt &p_start, const gp_Vec &v_start, double t_start, double t_end, gp_Pnt &p_end, gp_Vec &v_end)
{
    spline_for_CreateArcs->D1(t_end, p_end, v_end);


    gp_Pnt p1, p2, p3;



    bool can_do_spline_whole = calculate_biarc_points(p_start, v_start, p_end, v_end, p1, p2, p3);



    HeeksObj* arc_object1 = NULL;

    HeeksObj* arc_object2 = NULL;



    if(can_do_spline_whole)

    {

        CTangentialArc arc1(p_start, v_start, p2);

        CTangentialArc arc2(p2, gp_Vec(p3.XYZ() - p2.XYZ()), p_end);



        gp_Pnt p_middle1, p_middle2;

        spline_for_CreateArcs->D0(t_start + ((t_end - t_start) * 0.25), p_middle1);

        spline_for_CreateArcs->D0(t_start + ((t_end - t_start) * 0.75), p_middle2);



        if(!arc1.radius_equal(p_middle1, tolerance_for_CreateArcs) || !arc2.radius_equal(p_middle2, tolerance_for_CreateArcs))

            can_do_spline_whole = false;

        else

        {

            arc_object1 = arc1.MakeHArc();

            arc_object2 = arc2.MakeHArc();

        }

    }

    else

    {

        // calculate_biarc_points failed, just add a line

        new_spans_for_CreateArcs->push_back(new HLine(p_start, p_end, &(wxGetApp().current_color)));

        return;

    }



    if(can_do_spline_whole)

    {

        new_spans_for_CreateArcs->push_back(arc_object1);

        new_spans_for_CreateArcs->push_back(arc_object2);

    }

    else

    {

        double t_middle = t_start + ((t_end - t_start) * 0.5);

        gp_Pnt p_middle;

        gp_Vec v_middle;

        CreateArcs(p_start, v_start, t_start, t_middle, p_middle, v_middle);// recursive

        gp_Pnt new_p_end;

        gp_Vec new_v_end;

        CreateArcs(p_middle, v_middle, t_middle, t_end, new_p_end, new_v_end);

    }

}