public static extern TrivTVStruct *TrivTrilinearSrf(CagdPtStruct *Pt000, CagdPtStruct *Pt001, CagdPtStruct *Pt010, CagdPtStruct *Pt011, CagdPtStruct *Pt100, CagdPtStruct *Pt101, CagdPtStruct *Pt110, CagdPtStruct *Pt111);
public static extern MdlTrimSegStruct *MdlDivideTrimCrv(MdlTrimSegStruct *Seg, CagdPtStruct *Pts, int Idx, double Eps, int *Proximity);
public static extern int MdlSplitTrimCrv(MdlTrimSegStruct *Seg, CagdPtStruct *Pts, int Idx, double Eps, int *Proximity);