public static extern void gluTessCallback( /* GLUtesselator* */IntPtr tess, GLenum which, GLUCallbackProc fn);
public static extern void gluQuadricCallback( /* GLUquadric* */IntPtr qobj, GLenum which, GLUCallbackProc fn);
public static extern void gluNurbsCallback( /* GLUnurbs* */IntPtr nobj, GLenum which, GLUCallbackProc fn);
public static extern void gluNurbsCallback( /* GLUnurbs* */ IntPtr nobj, GLenum which, GLUCallbackProc fn);
public static extern void gluTessCallback( /* GLUtesselator* */ IntPtr tess, GLenum which, GLUCallbackProc fn);
public static extern void gluQuadricCallback( /* GLUquadric* */ IntPtr qobj, GLenum which, GLUCallbackProc fn);