-- File:	GeomFill_Boundary.cdl
-- Created:	Tue Oct 17 14:45:36 1995
-- Author:	Laurent BOURESCHE
--		<lbo@phylox>
---Copyright:	 Matra Datavision 1995


deferred class Boundary from GeomFill inherits TShared from MMgt

	---Purpose: Root class to define a boundary  which will form part of a
    	-- contour around a gap requiring filling.
    	-- The GeomFill package provides two classes to define constrained boundaries:
    	-- -   GeomFill_SimpleBound to define an unattached boundary
    	-- -   GeomFill_BoundWithSurf to define a boundary attached to a surface.
    	--   These objects are used to define the boundaries for a
    	-- GeomFill_ConstrainedFilling framework.
    	    	    
uses
    Pnt from gp,
    Vec from gp
    
is

    Initialize(Tol3d  : Real from Standard;
    	       Tolang : Real from Standard);
    
    Value(me; 
          U : Real from Standard) 
    returns Pnt from gp
    is deferred;

    D1(me; 
       U : Real from Standard; 
       P : out Pnt from gp; 
       V : out Vec from gp) 
    is deferred;

    HasNormals(me)
    returns Boolean from Standard
    is virtual;

    -- the methods giving informations  about normals  are implemented
    -- with a raise.
    -- use a call to HasNormals before calling Norm or D1Norm.
    Norm(me; 
         U : Real from Standard)
    returns Vec from gp
    is virtual;
    
    D1Norm(me; 
           U  : Real from Standard;
	   N  : out Vec from gp;
	   DN : out Vec from gp)
    is virtual;
    
    Reparametrize(me           : mutable;
    	    	  First, Last  : Real from Standard;
                  HasDF, HasDL : Boolean from Standard;
                  DF, DL       : Real from Standard;
    	          Rev          : Boolean from Standard)
    is deferred;
		  
    Points(me; PFirst, PLast : out Pnt from gp);

    Bounds(me; First, Last : out Real from Standard)
    is deferred;

    IsDegenerated(me) 
    returns Boolean from Standard
    is deferred;

    Tol3d(me) returns Real from Standard;

    Tol3d(me  : mutable; 
    	  Tol : Real from Standard);

    Tolang(me) returns Real from Standard;

    Tolang(me  : mutable; 
    	   Tol : Real from Standard);

fields

    myT3d  : Real from Standard;
    myTang : Real from Standard;

end Boundary;