public static extern void TrivVectCross3Vecs(TrivV4DType A, TrivV4DType B, TrivV4DType C, TrivV4DType Res);
public static extern TrivTVStruct *TrivTVOfRevAxis(CagdSrfStruct *Srf, TrivP4DType AxisPoint, TrivV4DType AxisVector, int PolyApprox);