extern int otb_6s_roujbrdf_(
  otb_6s_doublereal *k0,
  otb_6s_doublereal *k1,
  otb_6s_doublereal *k2,
  otb_6s_integer *mu,
  otb_6s_integer *np,
  otb_6s_doublereal *rm,
  otb_6s_doublereal *rp,
  otb_6s_doublereal *brdfint
  );
