-- File:	Extrema_Curve2dTool.cdl
-- Created:	Tue Jul 18 14:54:37 1995
-- Author:	Modelistation
--		<model@metrox>
---Copyright:	 Matra Datavision 1995


class Curve2dTool from Extrema

uses
     Curve2d         from Adaptor2d,
     Array1OfReal    from TColStd,
     Shape           from GeomAbs,
     CurveType       from GeomAbs,
     Vec2d           from gp,
     Pnt2d           from gp,
     Circ2d          from gp,
     Elips2d         from gp,
     Hypr2d          from gp,
     Parab2d         from gp,
     Lin2d           from gp,
     BezierCurve     from Geom2d,
     BSplineCurve    from Geom2d,
     HCurve2d        from Adaptor2d

is

    FirstParameter(myclass; C : Curve2d from Adaptor2d) returns Real
    	---C++: inline
    ;

    LastParameter(myclass; C : Curve2d from Adaptor2d) returns Real
    	---C++: inline
    ;
    
    Continuity(myclass; C : Curve2d from Adaptor2d) returns Shape from GeomAbs
    	---C++: inline
    ;
    
    NbIntervals(myclass; C : Curve2d from Adaptor2d; S : Shape from GeomAbs) returns Integer
	---Purpose: If necessary,   breaks the curve  in  intervals of
	--          continuity <S>.     And   returns  the  number  of
	--          intervals.
    	---C++: inline
    ;
    
    Intervals(myclass; C : Curve2d               from Adaptor2d;
    	    	       T : in out Array1OfReal from TColStd; 
    	               S : Shape               from GeomAbs);
	---Purpose: Stores in <T> the  parameters bounding the intervals
	--          of continuity <S>.
    	---C++: inline


    IsClosed(myclass; C : Curve2d from Adaptor2d) returns Boolean
    	---C++: inline
    ;
     
    IsPeriodic(myclass; C : Curve2d from Adaptor2d) returns Boolean
    	---C++: inline
    ;
    
    Period(myclass; C : Curve2d from Adaptor2d) returns Real
    	---C++: inline
    ;
     
    Value(myclass; C : Curve2d from Adaptor2d; U : Real) returns Pnt2d from gp
         --- Purpose : Computes the point of parameter U on the curve.
    	---C++: inline
    ;
    
    D0 (myclass; C : Curve2d from Adaptor2d; U : Real; P : out Pnt2d from gp)
         --- Purpose : Computes the point of parameter U on the curve.
    	---C++: inline
    ;
    
    D1 (myclass; C : Curve2d from Adaptor2d; U : Real; P : out Pnt2d from gp ; V : out Vec2d from gp)
         --- Purpose : Computes the point of parameter U on the curve with its
         --  first derivative.
    	---C++: inline
    ;
    
    D2 (myclass; C : Curve2d from Adaptor2d; U : Real; P : out Pnt2d from gp; V1, V2 : out Vec2d from gp)
        --- Purpose :
        --  Returns the point P of parameter U, the first and second
        --  derivatives V1 and V2.
     	---C++: inline
    ;

    D3 (myclass; C : Curve2d from Adaptor2d; U : Real; P : out Pnt2d from gp; V1, V2, V3 : out Vec2d from gp)
        --- Purpose :
        --  Returns the point P of parameter U, the first, the second 
        --  and the third derivative.
     	---C++: inline
    ;
        
    DN (myclass; C : Curve2d from Adaptor2d; U : Real; N : Integer)   returns Vec2d from gp
        --- Purpose :
        --  The returned vector gives the value of the derivative for the 
        --  order of derivation N.
     	---C++: inline
    ;

    Resolution(myclass; C : Curve2d from Adaptor2d ; R3d : Real) returns Real
         ---Purpose :  Returns the parametric  resolution corresponding
         --         to the real space resolution <R3d>.
    	---C++: inline
    ;   
        
    GetType(myclass; C : Curve2d from Adaptor2d) returns CurveType from GeomAbs
	---Purpose: Returns  the  type of the   curve  in the  current
	--          interval :   Line,   Circle,   Ellipse, Hyperbola,
	--          Parabola, BezierCurve, BSplineCurve, OtherCurve.
    	---C++: inline
    ;


     Line(myclass; C : Curve2d from Adaptor2d) returns Lin2d from gp
     	---C++: inline
    ;
     
     Circle(myclass; C : Curve2d from Adaptor2d) returns Circ2d from gp
     	---C++: inline
    ;
     
     Ellipse(myclass; C : Curve2d from Adaptor2d) returns Elips2d from gp
     	---C++: inline
    ;
     
     Hyperbola(myclass; C : Curve2d from Adaptor2d) returns  Hypr2d from gp
     	---C++: inline
    ;
     
     Parabola(myclass; C : Curve2d from Adaptor2d) returns Parab2d from gp
     	---C++: inline
    ;
     
     Degree(myclass; C : Curve2d from Adaptor2d) returns Integer
     	---C++: inline
    ;
     
     IsRational(myclass; C : Curve2d from Adaptor2d) returns Boolean
     	---C++: inline
    ;
     
     NbPoles(myclass; C : Curve2d from Adaptor2d) returns Integer
     	---C++: inline
    ;
     
     NbKnots(myclass; C : Curve2d from Adaptor2d) returns Integer
     	---C++: inline
    ;
     
     Bezier(myclass; C : Curve2d from Adaptor2d) returns BezierCurve from  Geom2d
     	---C++: inline
    ;
     
     BSpline(myclass; C : Curve2d from Adaptor2d) returns BSplineCurve from  Geom2d
     	---C++: inline
    ;


end Curve2dTool;