28                   float x4, float y4)  in curve4_points()
36         cp[6] = x4;  in curve4_points()
42               float x4, float y4)  in init()
50         cp[6] = x4;  in init()
71                float x4, float y4) :  in curve4_div()  argument
74         init(x1, y1, x2, y2, x3, y3, x4, y4);  in curve4_div()
89               float x4, float y4);
127                 float x4, float y4);
131                           float x4, float y4,
145            float x4, float y4)  in curve4()  argument
147         init(x1, y1, x2, y2, x3, y3, x4, y4);  in curve4()
160               float x4, float y4)  in init()  argument
162         m_curve_div.init(x1, y1, x2, y2, x3, y3, x4, y4);  in init()