-- File:	BRepToIGES_BRShell.cdl
-- Created:	Fri Jan 27 11:28:57 1995
-- Author:	Marie Jose MARTZ
--		<mjm@pronox>
---Copyright:	 Matra Datavision 1995


class BRShell from BRepToIGES inherits BREntity from BRepToIGES

    ---Purpose: This class implements the transfer of Shape Entities from Geom
    --          To IGES. These can be :
    --            . Vertex
    --            . Edge
    --            . Wire
  

uses

    Shape                from TopoDS,
    Face                 from TopoDS,
    Shell                from TopoDS,
    IGESEntity           from IGESData,
    BREntity             from BRepToIGES    
    
is 
    
    Create 
    	returns BRShell from BRepToIGES;
    
    Create (BR : BREntity from BRepToIGES)
    	returns BRShell from BRepToIGES;    


    TransferShell (me    : in out;
                   start : Shape from TopoDS)
    	returns mutable IGESEntity from IGESData;
    ---Purpose :  Transfert an Shape entity from TopoDS to IGES
    --            This entity must be a Face or a Shell.
    --            If this Entity could not be converted, this member returns a NullEntity.


    TransferShell (me    : in out;
                   start : Shell from TopoDS)
    	returns mutable IGESEntity from IGESData;
    ---Purpose :  Transfert an Shell entity from TopoDS to IGES
    --            If this Entity could not be converted, this member returns a NullEntity.


    TransferFace (me    : in out;
                  start : Face from TopoDS)
    	returns mutable IGESEntity from IGESData;
    ---Purpose :  Transfert a Face entity from TopoDS to IGES
    --            If this Entity could not be converted, this member returns a NullEntity.


end BRShell;