-- File:	HLRBRep_SLPropsATool.cdl
-- Created:	Fri Apr 23 13:56:45 1993
-- Author:	Modelistation
--		<model@phylox>
---Copyright:	 Matra Datavision 1993

class SLPropsATool from HLRBRep

uses
    Address from Standard,
    Pnt     from gp,
    Vec     from gp

is

    Value(myclass; A    :     Address from Standard; 
    	    	   U, V :     Real    from Standard;
                   P    : out Pnt     from gp);
    	---Purpose: Computes the point  <P> of 	parameter <U> and <V>
    	--          on the Surface <A>.
    	--
    	---C++: inline

    D1   (myclass; A        : Address from Standard;
                   U, V     : Real    from Standard;
                   P        : out Pnt from gp;
                   D1U, D1V : out Vec from gp);
    	---Purpose: Computes the point <P>  and first derivative <D1*>
    	--          of parameter <U> and <V> on the Surface <A>.
    	--          
    	---C++: inline

    D2   (myclass; A    : Address from Standard;
                   U, V : Real    from Standard; 
              P : out Pnt; D1U, D1V, D2U, D2V, DUV : out Vec);
    	---Purpose: Computes the point <P>, the first derivative <D1*>
    	--          and second  derivative <D2*> of parameter  <U> and
    	--          <V> on the Surface <A>.
    	--          
       	---C++: inline

    DN   (myclass; A      : Address from Standard;
                   U, V   : Real    from Standard;
		   Nu, Nv : Integer from Standard)
    returns Vec from gp;

    Continuity(myclass; A : Address from Standard)
    returns Integer from Standard;
    	---Purpose: returns the order of   continuity of the   Surface
    	--          <A>.  returns  1   :  first  derivative    only is
    	--          computable returns 2 : first and second derivative
    	--          only are computable.
    	--          
       	---C++: inline

    Bounds(myclass; A              :     Address from Standard;
                    U1, V1, U2, V2 : out Real    from Standard);
    	---Purpose: returns the bounds of the Surface.
    	--          
    	---C++: inline

end SLPropsATool;