public static extern int TrivPlaneFrom4Points(TrivP4DType Pt1, TrivP4DType Pt2, TrivP4DType Pt3, TrivP4DType Pt4, TrivPln4DType Plane);
public static extern TrivTVStruct *TrivTVOfRevAxis(CagdSrfStruct *Srf, TrivP4DType AxisPoint, TrivV4DType AxisVector, int PolyApprox);