typedef struct {
Xgl_usgn32order_u;/∗ Order of surface in u ∗/
Xgl_usgn32order_v;/∗ Order of surface in v ∗/
Xgl_usgn32num_knots_u;/∗ Number of knots in u ∗/
float∗knot_vector_u;/∗ Knot vector in u ∗/
Xgl_usgn32num_knots_v;/∗ Number of knots in v ∗/
float∗knot_vector_v;/∗ Knot vector in v ∗/
Xgl_pt_listctrl_pts;/∗ Row-ordered list of control
     points (index changes faster
     in u direction than v). ∗/
} Xgl_nurbs_surf;

SunOS