-- File:	Plate_D2.cdl
-- Created:	Thu Oct 19 18:01:25 1995
-- Author:	Andre LIEUTIER
--		<ds@sgi63>
---Copyright:	 Matra Datavision 1995

class D2 from Plate
---Purpose : define an order 2 derivatives of a 3d valued
--          function of a 2d variable
--         

uses XYZ from gp

is
    Create(duu,duv,dvv : XYZ from gp) returns D2;
    Create(ref  :  D2  from  Plate) returns D2;

fields
    
    Duu, Duv,Dvv : XYZ from gp;

friends
    class GtoCConstraint from Plate,
    class FreeGtoCConstraint from Plate    
end;