typedef struct {
Xgl_usgn32order_u;
Xgl_usgn32order_v;
Xgl_usgn32num_knots_u;
float∗knot_vector_u;
Xgl_usgn32num_knots_v;
float∗knot_vector_v;
Xgl_spline_data∗data;
} Xgl_surf_data_spline;

SunOS