-- File:	HLRBRep_CLPropsATool.cdl
-- Created:	Tue Apr 20 18:34:23 1993
-- Author:	Modelistation
--		<model@phylox>
---Copyright:	 Matra Datavision 1993

class CLPropsATool from HLRBRep

uses
    Curve from HLRBRep,
    Pnt2d from gp,
    Vec2d from gp

is
    Value(myclass; A :     Address from Standard;
                   U :     Real    from Standard;
                   P : out Pnt2d   from gp);
    	---Purpose: Computes the  point <P> of  parameter <U>   on the
    	--          Curve from HLRBRep <C>.
    	--
    	---C++: inline          
         	
    D1   (myclass; A  :     Address from Standard;
                   U  :     Real    from Standard;
                   P  : out Pnt2d   from gp;
                   V1 : out Vec2d   from gp);
    	---Purpose: Computes the point <P>  and  first derivative <V1>
    	--          of parameter <U> on the curve <C>.
    	--
    	---C++: inline          

    D2   (myclass; A      :     Address from Standard;
                   U      :     Real    from Standard;
                   P      : out Pnt2d   from gp;
                   V1, V2 : out Vec2d from gp);
    	---Purpose: Computes the point <P>,  the first derivative <V1>
    	--          and second derivative <V2> of parameter <U> on the
    	--          curve <C>.
    	--
    	---C++: inline          
    
    D3   (myclass; A          :     Address from Standard;
                   U          :     Real    from Standard; 
                   P          : out Pnt2d   from gp;
                   V1, V2, V3 : out Vec2d   from gp);
    	---Purpose: Computes the point <P>, the first derivative <V1>,
    	--          the second derivative  <V2>   and third derivative
    	--          <V3> of parameter <U> on the curve <C>.
    	--
    	---C++: inline          

    Continuity(myclass; A : Address from Standard)
    returns Integer from Standard;
     	---Purpose: returns the order  of continuity of the curve <C>.
     	--          returns 1 :  first  derivative only is  computable
     	--          returns 2  : first and  second derivative only are
     	--          computable.  returns  3 : first,  second and third
     	--          are computable.
    	--
    	---C++: inline          

    FirstParameter(myclass; A : Address from Standard)
    returns Real from Standard;
     	---Purpose: returns the first parameter bound of the curve.
     	--          
    	---C++: inline          
     
    LastParameter(myclass; A : Address from Standard)
    returns Real from Standard;
	---Purpose: returns the  last  parameter bound  of  the curve.
	--          FirstParameter must be less than LastParamenter.
    	--
    	---C++: inline          

end CLPropsATool;