static Offset <FRB> build_body_observation(FlatBufferBuilder b, Vector3 vel, Vector3 ang) { FRB.StartFRB(b); FRB.AddBody(b, FBody.CreateFBody(b, vel.x, vel.y, vel.z, ang.x, ang.y, ang.z)); return(FRB.EndFRB(b)); }