typedef struct {
Xgl_pt_flag_f3dcenter;/∗ center point ∗/
Xgl_pt_f3ddir[3];/∗ dir. vectors and normal vector ∗/
Xgl_booleandir_normalized;/∗ TRUE when dir[] are unit vectors ∗/
Xgl_booleandir_normal;/∗ TRUE if dir[2] is a valid vector ∗/
floatradius;/∗ radius of curvature ∗/
floatstart_angle,/∗ start and stop angles ∗/
stop_angle;
} Xgl_arc_f3d;

SunOS